Migrating to new directory structure adopted from the RealVNC's source tree. More changes will follow.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@589 3789f03b-4d11-0410-bbf8-ca57d06f2519

314 files changed, 69330 insertions, 0 deletions

diff --git a/common/Xregion/Makefile.in b/common/Xregion/Makefile.in
new file mode 100644
index 00000000..878a29b6
--- /dev/null
+++ b/common/Xregion/Makefile.in
@@ -0,0 +1,15 @@
+
+SRCS = Region.c
+
+OBJS = $(SRCS:.c=.o)
+
+library = libXregion.a
+
+all:: $(library)
+
+$(library): $(OBJS)
+	rm -f $(library)
+	$(AR) $(library) $(OBJS)
+	$(RANLIB) $(library)
+
+# followed by boilerplate.mk
diff --git a/common/Xregion/Region.c b/common/Xregion/Region.c
new file mode 100644
index 00000000..c0b1e5a2
--- /dev/null
+++ b/common/Xregion/Region.c
@@ -0,0 +1,1694 @@
+/* $Xorg: Region.c,v 1.6 2001/02/09 02:03:35 xorgcvs Exp $ */
+/************************************************************************
+
+Copyright 1987, 1988, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+************************************************************************/
+/* $XFree86: xc/lib/X11/Region.c,v 1.8 2001/12/14 19:54:05 dawes Exp $ */
+/*
+ * The functions in this file implement the Region abstraction, similar to one
+ * used in the X11 sample server. A Region is simply an area, as the name
+ * implies, and is implemented as a "y-x-banded" array of rectangles. To
+ * explain: Each Region is made up of a certain number of rectangles sorted
+ * by y coordinate first, and then by x coordinate.
+ *
+ * Furthermore, the rectangles are banded such that every rectangle with a
+ * given upper-left y coordinate (y1) will have the same lower-right y
+ * coordinate (y2) and vice versa. If a rectangle has scanlines in a band, it
+ * will span the entire vertical distance of the band. This means that some
+ * areas that could be merged into a taller rectangle will be represented as
+ * several shorter rectangles to account for shorter rectangles to its left
+ * or right but within its "vertical scope".
+ *
+ * An added constraint on the rectangles is that they must cover as much
+ * horizontal area as possible. E.g. no two rectangles in a band are allowed
+ * to touch.
+ *
+ * Whenever possible, bands will be merged together to cover a greater vertical
+ * distance (and thus reduce the number of rectangles). Two bands can be merged
+ * only if the bottom of one touches the top of the other and they have
+ * rectangles in the same places (of the same width, of course). This maintains
+ * the y-x-banding that's so nice to have...
+ */
+
+#include "Xregion.h"
+//#include "Xlibint.h"
+//#include "Xutil.h"
+#include "region.h"
+//#include "poly.h"
+
+#ifndef min
+#define min(a,b)            (((a) < (b)) ? (a) : (b))
+#endif
+#ifndef max
+#define max(a,b)            (((a) > (b)) ? (a) : (b))
+#endif
+
+#ifdef DEBUG
+#include <stdio.h>
+#define assert(expr) {if (!(expr)) fprintf(stderr,\
+"Assertion failed file %s, line %d: expr\n", __FILE__, __LINE__); }
+#else
+#define assert(expr)
+#endif
+
+typedef void (*voidProcp)();
+
+static void miRegionOp();
+/*	Create a new empty region	*/
+Region
+XCreateRegion()
+{
+    Region temp;
+
+    if (! (temp = ( Region )Xmalloc( (unsigned) sizeof( REGION ))))
+	return (Region) NULL;
+    if (! (temp->rects = ( BOX * )Xmalloc( (unsigned) sizeof( BOX )))) {
+	Xfree((char *) temp);
+	return (Region) NULL;
+    }
+    temp->numRects = 0;
+    temp->extents.x1 = 0;
+    temp->extents.y1 = 0;
+    temp->extents.x2 = 0;
+    temp->extents.y2 = 0;
+    temp->size = 1;
+    return( temp );
+}
+
+int
+XClipBox( r, rect )
+    Region r;
+    XRectangle *rect;
+{
+    rect->x = r->extents.x1;
+    rect->y = r->extents.y1;
+    rect->width = r->extents.x2 - r->extents.x1;
+    rect->height = r->extents.y2 - r->extents.y1;
+    return 1;
+}
+
+int
+XUnionRectWithRegion(rect, source, dest)
+    register XRectangle *rect;
+    Region source, dest;
+{
+    REGION region;
+
+    if (!rect->width || !rect->height)
+	return 0;
+    region.rects = &region.extents;
+    region.numRects = 1;
+    region.extents.x1 = rect->x;
+    region.extents.y1 = rect->y;
+    region.extents.x2 = rect->x + rect->width;
+    region.extents.y2 = rect->y + rect->height;
+    region.size = 1;
+
+    return XUnionRegion(&region, source, dest);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miSetExtents --
+ *	Reset the extents of a region to what they should be. Called by
+ *	miSubtract and miIntersect b/c they can't figure it out along the
+ *	way or do so easily, as miUnion can.
+ *
+ * Results:
+ *	None.
+ *
+ * Side Effects:
+ *	The region's 'extents' structure is overwritten.
+ *
+ *-----------------------------------------------------------------------
+ */
+static void
+miSetExtents (pReg)
+    Region	  	pReg;
+{
+    register BoxPtr	pBox,
+			pBoxEnd,
+			pExtents;
+
+    if (pReg->numRects == 0)
+    {
+	pReg->extents.x1 = 0;
+	pReg->extents.y1 = 0;
+	pReg->extents.x2 = 0;
+	pReg->extents.y2 = 0;
+	return;
+    }
+
+    pExtents = &pReg->extents;
+    pBox = pReg->rects;
+    pBoxEnd = &pBox[pReg->numRects - 1];
+
+    /*
+     * Since pBox is the first rectangle in the region, it must have the
+     * smallest y1 and since pBoxEnd is the last rectangle in the region,
+     * it must have the largest y2, because of banding. Initialize x1 and
+     * x2 from  pBox and pBoxEnd, resp., as good things to initialize them
+     * to...
+     */
+    pExtents->x1 = pBox->x1;
+    pExtents->y1 = pBox->y1;
+    pExtents->x2 = pBoxEnd->x2;
+    pExtents->y2 = pBoxEnd->y2;
+
+    assert(pExtents->y1 < pExtents->y2);
+    while (pBox <= pBoxEnd)
+    {
+	if (pBox->x1 < pExtents->x1)
+	{
+	    pExtents->x1 = pBox->x1;
+	}
+	if (pBox->x2 > pExtents->x2)
+	{
+	    pExtents->x2 = pBox->x2;
+	}
+	pBox++;
+    }
+    assert(pExtents->x1 < pExtents->x2);
+}
+
+extern void _XSetClipRectangles();
+
+#if 0
+int
+XSetRegion( dpy, gc, r )
+    Display *dpy;
+    GC gc;
+    register Region r;
+{
+    register int i;
+    register XRectangle *xr, *pr;
+    register BOX *pb;
+    unsigned long total;
+
+    LockDisplay (dpy);
+    total = r->numRects * sizeof (XRectangle);
+    if ((xr = (XRectangle *) _XAllocTemp(dpy, total))) {
+	for (pr = xr, pb = r->rects, i = r->numRects; --i >= 0; pr++, pb++) {
+	    pr->x = pb->x1;
+	    pr->y = pb->y1;
+	    pr->width = pb->x2 - pb->x1;
+	    pr->height = pb->y2 - pb->y1;
+	}
+    }
+    if (xr || !r->numRects)
+	_XSetClipRectangles(dpy, gc, 0, 0, xr, r->numRects, YXBanded);
+    if (xr)
+	_XFreeTemp(dpy, (char *)xr, total);
+    UnlockDisplay(dpy);
+    SyncHandle();
+    return 1;
+}
+#endif
+
+int
+XDestroyRegion( r )
+    Region r;
+{
+    Xfree( (char *) r->rects );
+    Xfree( (char *) r );
+    return 1;
+}
+
+
+/* TranslateRegion(pRegion, x, y)
+   translates in place
+   added by raymond
+*/
+
+int
+XOffsetRegion(pRegion, x, y)
+    register Region pRegion;
+    register int x;
+    register int y;
+{
+    register int nbox;
+    register BOX *pbox;
+
+    pbox = pRegion->rects;
+    nbox = pRegion->numRects;
+
+    while(nbox--)
+    {
+	pbox->x1 += x;
+	pbox->x2 += x;
+	pbox->y1 += y;
+	pbox->y2 += y;
+	pbox++;
+    }
+    pRegion->extents.x1 += x;
+    pRegion->extents.x2 += x;
+    pRegion->extents.y1 += y;
+    pRegion->extents.y2 += y;
+    return 1;
+}
+
+/* 
+   Utility procedure Compress:
+   Replace r by the region r', where 
+     p in r' iff (Quantifer m <= dx) (p + m in r), and
+     Quantifier is Exists if grow is TRUE, For all if grow is FALSE, and
+     (x,y) + m = (x+m,y) if xdir is TRUE; (x,y+m) if xdir is FALSE.
+
+   Thus, if xdir is TRUE and grow is FALSE, r is replaced by the region
+   of all points p such that p and the next dx points on the same
+   horizontal scan line are all in r.  We do this using by noting
+   that p is the head of a run of length 2^i + k iff p is the head
+   of a run of length 2^i and p+2^i is the head of a run of length
+   k. Thus, the loop invariant: s contains the region corresponding
+   to the runs of length shift.  r contains the region corresponding
+   to the runs of length 1 + dxo & (shift-1), where dxo is the original
+   value of dx.  dx = dxo & ~(shift-1).  As parameters, s and t are
+   scratch regions, so that we don't have to allocate them on every
+   call.
+*/
+
+#define ZOpRegion(a,b,c) if (grow) XUnionRegion(a,b,c); \
+			 else XIntersectRegion(a,b,c)
+#define ZShiftRegion(a,b) if (xdir) XOffsetRegion(a,b,0); \
+			  else XOffsetRegion(a,0,b)
+#define ZCopyRegion(a,b) XUnionRegion(a,a,b)
+
+static void
+Compress(r, s, t, dx, xdir, grow)
+    Region r, s, t;
+    register unsigned dx;
+    register int xdir, grow;
+{
+    register unsigned shift = 1;
+
+    ZCopyRegion(r, s);
+    while (dx) {
+        if (dx & shift) {
+            ZShiftRegion(r, -(int)shift);
+            ZOpRegion(r, s, r);
+            dx -= shift;
+            if (!dx) break;
+        }
+        ZCopyRegion(s, t);
+        ZShiftRegion(s, -(int)shift);
+        ZOpRegion(s, t, s);
+        shift <<= 1;
+    }
+}
+
+#undef ZOpRegion
+#undef ZShiftRegion
+#undef ZCopyRegion
+
+int
+XShrinkRegion(r, dx, dy)
+    Region r;
+    int dx, dy;
+{
+    Region s, t;
+    int grow;
+
+    if (!dx && !dy) return 0;
+    if ((! (s = XCreateRegion()))  || (! (t = XCreateRegion()))) return 0;
+    if ((grow = (dx < 0))) dx = -dx;
+    if (dx) Compress(r, s, t, (unsigned) 2*dx, TRUE, grow);
+    if ((grow = (dy < 0))) dy = -dy;
+    if (dy) Compress(r, s, t, (unsigned) 2*dy, FALSE, grow);
+    XOffsetRegion(r, dx, dy);
+    XDestroyRegion(s);
+    XDestroyRegion(t);
+    return 0;
+}
+
+#ifdef notdef
+/***********************************************************
+ *     Bop down the array of rects until we have passed
+ *     scanline y.  numRects is the size of the array.
+ ***********************************************************/
+
+static BOX 
+*IndexRects(rects, numRects, y)
+    register BOX *rects;
+    register int numRects;
+    register int y;
+{
+     while ((numRects--) && (rects->y2 <= y))
+        rects++;
+     return(rects);
+}
+#endif
+
+/*======================================================================
+ *	    Region Intersection
+ *====================================================================*/
+/*-
+ *-----------------------------------------------------------------------
+ * miIntersectO --
+ *	Handle an overlapping band for miIntersect.
+ *
+ * Results:
+ *	None.
+ *
+ * Side Effects:
+ *	Rectangles may be added to the region.
+ *
+ *-----------------------------------------------------------------------
+ */
+/* static void*/
+static int
+miIntersectO (pReg, r1, r1End, r2, r2End, y1, y2)
+    register Region	pReg;
+    register BoxPtr	r1;
+    BoxPtr  	  	r1End;
+    register BoxPtr	r2;
+    BoxPtr  	  	r2End;
+    short    	  	y1;
+    short    	  	y2;
+{
+    register short  	x1;
+    register short  	x2;
+    register BoxPtr	pNextRect;
+
+    pNextRect = &pReg->rects[pReg->numRects];
+
+    while ((r1 != r1End) && (r2 != r2End))
+    {
+	x1 = max(r1->x1,r2->x1);
+	x2 = min(r1->x2,r2->x2);
+
+	/*
+	 * If there's any overlap between the two rectangles, add that
+	 * overlap to the new region.
+	 * There's no need to check for subsumption because the only way
+	 * such a need could arise is if some region has two rectangles
+	 * right next to each other. Since that should never happen...
+	 */
+	if (x1 < x2)
+	{
+	    assert(y1<y2);
+
+	    MEMCHECK(pReg, pNextRect, pReg->rects);
+	    pNextRect->x1 = x1;
+	    pNextRect->y1 = y1;
+	    pNextRect->x2 = x2;
+	    pNextRect->y2 = y2;
+	    pReg->numRects += 1;
+	    pNextRect++;
+	    assert(pReg->numRects <= pReg->size);
+	}
+
+	/*
+	 * Need to advance the pointers. Shift the one that extends
+	 * to the right the least, since the other still has a chance to
+	 * overlap with that region's next rectangle, if you see what I mean.
+	 */
+	if (r1->x2 < r2->x2)
+	{
+	    r1++;
+	}
+	else if (r2->x2 < r1->x2)
+	{
+	    r2++;
+	}
+	else
+	{
+	    r1++;
+	    r2++;
+	}
+    }
+    return 0;	/* lint */
+}
+
+int
+XIntersectRegion(reg1, reg2, newReg)
+    Region 	  	reg1;
+    Region	  	reg2;          /* source regions     */
+    register Region 	newReg;               /* destination Region */
+{
+   /* check for trivial reject */
+    if ( (!(reg1->numRects)) || (!(reg2->numRects))  ||
+	(!EXTENTCHECK(&reg1->extents, &reg2->extents)))
+        newReg->numRects = 0;
+    else
+	miRegionOp (newReg, reg1, reg2, 
+    		(voidProcp) miIntersectO, (voidProcp) NULL, (voidProcp) NULL);
+    
+    /*
+     * Can't alter newReg's extents before we call miRegionOp because
+     * it might be one of the source regions and miRegionOp depends
+     * on the extents of those regions being the same. Besides, this
+     * way there's no checking against rectangles that will be nuked
+     * due to coalescing, so we have to examine fewer rectangles.
+     */
+    miSetExtents(newReg);
+    return 1;
+}
+
+static void
+miRegionCopy(dstrgn, rgn)
+    register Region dstrgn;
+    register Region rgn;
+
+{
+    if (dstrgn != rgn) /*  don't want to copy to itself */
+    {  
+        if (dstrgn->size < rgn->numRects)
+        {
+            if (dstrgn->rects)
+            {
+		BOX *prevRects = dstrgn->rects;
+		
+                if (! (dstrgn->rects = (BOX *)
+		       Xrealloc((char *) dstrgn->rects,
+				(unsigned) rgn->numRects * (sizeof(BOX))))) {
+		    Xfree(prevRects);
+		    return;
+		}
+            }
+            dstrgn->size = rgn->numRects;
+	}
+        dstrgn->numRects = rgn->numRects;
+        dstrgn->extents.x1 = rgn->extents.x1;
+        dstrgn->extents.y1 = rgn->extents.y1;
+        dstrgn->extents.x2 = rgn->extents.x2;
+        dstrgn->extents.y2 = rgn->extents.y2;
+
+	memcpy((char *) dstrgn->rects, (char *) rgn->rects,
+	       (int) (rgn->numRects * sizeof(BOX)));
+    }
+}
+
+#ifdef notdef
+
+/*
+ *  combinRegs(newReg, reg1, reg2)
+ *    if one region is above or below the other.
+*/ 
+
+static void
+combineRegs(newReg, reg1, reg2)
+    register Region newReg;
+    Region reg1;
+    Region reg2;
+{
+    register Region tempReg;
+    register BOX *rects;
+    register BOX *rects1;
+    register BOX *rects2;
+    register int total;
+
+    rects1 = reg1->rects;
+    rects2 = reg2->rects;
+
+    total = reg1->numRects + reg2->numRects;
+    if (! (tempReg = XCreateRegion()))
+	return;
+    tempReg->size = total;
+    /*  region 1 is below region 2  */
+    if (reg1->extents.y1 > reg2->extents.y1)
+    {
+        miRegionCopy(tempReg, reg2);
+        rects = &tempReg->rects[tempReg->numRects];
+        total -= tempReg->numRects;
+        while (total--)
+            *rects++ = *rects1++;
+    }
+    else
+    {
+        miRegionCopy(tempReg, reg1);
+        rects = &tempReg->rects[tempReg->numRects];
+        total -= tempReg->numRects;
+        while (total--)
+            *rects++ = *rects2++;
+    }
+    tempReg->extents = reg1->extents;
+    tempReg->numRects = reg1->numRects + reg2->numRects;
+    EXTENTS(&reg2->extents, tempReg);  
+    miRegionCopy(newReg, tempReg);
+    Xfree((char *)tempReg);
+}
+
+/*
+ *  QuickCheck checks to see if it does not have to go through all the
+ *  the ugly code for the region call.  It returns 1 if it did all
+ *  the work for Union, otherwise 0 - still work to be done.
+*/ 
+
+static int
+QuickCheck(newReg, reg1, reg2)
+    Region newReg, reg1, reg2;
+{
+
+    /*  if unioning with itself or no rects to union with  */
+    if ( (reg1 == reg2) || (!(reg1->numRects)) )
+    {
+        miRegionCopy(newReg, reg2);
+        return TRUE;
+    }
+
+    /*   if nothing to union   */
+    if (!(reg2->numRects))
+    {
+        miRegionCopy(newReg, reg1);
+        return TRUE;
+    }
+
+    /*   could put an extent check to see if add above or below */
+
+    if ((reg1->extents.y1 >= reg2->extents.y2) ||
+        (reg2->extents.y1 >= reg1->extents.y2) )
+    {
+        combineRegs(newReg, reg1, reg2);
+        return TRUE;
+    }
+    return FALSE;
+}
+
+/*   TopRects(rects, reg1, reg2)
+ * N.B. We now assume that reg1 and reg2 intersect.  Therefore we are
+ * NOT checking in the two while loops for stepping off the end of the
+ * region.  
+ */ 
+
+static int
+TopRects(newReg, rects, reg1, reg2, FirstRect)
+    register Region newReg;
+    register BOX *rects;
+    register Region reg1;
+    register Region reg2; 
+    BOX *FirstRect;
+{
+    register BOX *tempRects;
+
+    /*  need to add some rects from region 1 */
+    if (reg1->extents.y1 < reg2->extents.y1)
+    {
+        tempRects = reg1->rects;
+        while(tempRects->y1 < reg2->extents.y1)
+	{
+	    MEMCHECK(newReg, rects, FirstRect);
+            ADDRECTNOX(newReg,rects, tempRects->x1, tempRects->y1, 
+		       tempRects->x2, MIN(tempRects->y2, reg2->extents.y1));
+            tempRects++;
+	}
+    }
+    /*  need to add some rects from region 2 */
+    if (reg2->extents.y1 < reg1->extents.y1)
+    {
+        tempRects = reg2->rects;
+        while (tempRects->y1 < reg1->extents.y1)
+        {
+            MEMCHECK(newReg, rects, FirstRect);
+            ADDRECTNOX(newReg, rects, tempRects->x1,tempRects->y1, 
+		       tempRects->x2, MIN(tempRects->y2, reg1->extents.y1));
+            tempRects++;
+	}
+    }
+    return 1;
+}
+#endif
+
+/*======================================================================
+ *	    Generic Region Operator
+ *====================================================================*/
+
+/*-
+ *-----------------------------------------------------------------------
+ * miCoalesce --
+ *	Attempt to merge the boxes in the current band with those in the
+ *	previous one. Used only by miRegionOp.
+ *
+ * Results:
+ *	The new index for the previous band.
+ *
+ * Side Effects:
+ *	If coalescing takes place:
+ *	    - rectangles in the previous band will have their y2 fields
+ *	      altered.
+ *	    - pReg->numRects will be decreased.
+ *
+ *-----------------------------------------------------------------------
+ */
+/* static int*/
+static int
+miCoalesce (pReg, prevStart, curStart)
+    register Region	pReg;	    	/* Region to coalesce */
+    int	    	  	prevStart;  	/* Index of start of previous band */
+    int	    	  	curStart;   	/* Index of start of current band */
+{
+    register BoxPtr	pPrevBox;   	/* Current box in previous band */
+    register BoxPtr	pCurBox;    	/* Current box in current band */
+    register BoxPtr	pRegEnd;    	/* End of region */
+    int	    	  	curNumRects;	/* Number of rectangles in current
+					 * band */
+    int	    	  	prevNumRects;	/* Number of rectangles in previous
+					 * band */
+    int	    	  	bandY1;	    	/* Y1 coordinate for current band */
+
+    pRegEnd = &pReg->rects[pReg->numRects];
+
+    pPrevBox = &pReg->rects[prevStart];
+    prevNumRects = curStart - prevStart;
+
+    /*
+     * Figure out how many rectangles are in the current band. Have to do
+     * this because multiple bands could have been added in miRegionOp
+     * at the end when one region has been exhausted.
+     */
+    pCurBox = &pReg->rects[curStart];
+    bandY1 = pCurBox->y1;
+    for (curNumRects = 0;
+	 (pCurBox != pRegEnd) && (pCurBox->y1 == bandY1);
+	 curNumRects++)
+    {
+	pCurBox++;
+    }
+    
+    if (pCurBox != pRegEnd)
+    {
+	/*
+	 * If more than one band was added, we have to find the start
+	 * of the last band added so the next coalescing job can start
+	 * at the right place... (given when multiple bands are added,
+	 * this may be pointless -- see above).
+	 */
+	pRegEnd--;
+	while (pRegEnd[-1].y1 == pRegEnd->y1)
+	{
+	    pRegEnd--;
+	}
+	curStart = pRegEnd - pReg->rects;
+	pRegEnd = pReg->rects + pReg->numRects;
+    }
+	
+    if ((curNumRects == prevNumRects) && (curNumRects != 0)) {
+	pCurBox -= curNumRects;
+	/*
+	 * The bands may only be coalesced if the bottom of the previous
+	 * matches the top scanline of the current.
+	 */
+	if (pPrevBox->y2 == pCurBox->y1)
+	{
+	    /*
+	     * Make sure the bands have boxes in the same places. This
+	     * assumes that boxes have been added in such a way that they
+	     * cover the most area possible. I.e. two boxes in a band must
+	     * have some horizontal space between them.
+	     */
+	    do
+	    {
+		if ((pPrevBox->x1 != pCurBox->x1) ||
+		    (pPrevBox->x2 != pCurBox->x2))
+		{
+		    /*
+		     * The bands don't line up so they can't be coalesced.
+		     */
+		    return (curStart);
+		}
+		pPrevBox++;
+		pCurBox++;
+		prevNumRects -= 1;
+	    } while (prevNumRects != 0);
+
+	    pReg->numRects -= curNumRects;
+	    pCurBox -= curNumRects;
+	    pPrevBox -= curNumRects;
+
+	    /*
+	     * The bands may be merged, so set the bottom y of each box
+	     * in the previous band to that of the corresponding box in
+	     * the current band.
+	     */
+	    do
+	    {
+		pPrevBox->y2 = pCurBox->y2;
+		pPrevBox++;
+		pCurBox++;
+		curNumRects -= 1;
+	    } while (curNumRects != 0);
+
+	    /*
+	     * If only one band was added to the region, we have to backup
+	     * curStart to the start of the previous band.
+	     *
+	     * If more than one band was added to the region, copy the
+	     * other bands down. The assumption here is that the other bands
+	     * came from the same region as the current one and no further
+	     * coalescing can be done on them since it's all been done
+	     * already... curStart is already in the right place.
+	     */
+	    if (pCurBox == pRegEnd)
+	    {
+		curStart = prevStart;
+	    }
+	    else
+	    {
+		do
+		{
+		    *pPrevBox++ = *pCurBox++;
+		} while (pCurBox != pRegEnd);
+	    }
+	    
+	}
+    }
+    return (curStart);
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miRegionOp --
+ *	Apply an operation to two regions. Called by miUnion, miInverse,
+ *	miSubtract, miIntersect...
+ *
+ * Results:
+ *	None.
+ *
+ * Side Effects:
+ *	The new region is overwritten.
+ *
+ * Notes:
+ *	The idea behind this function is to view the two regions as sets.
+ *	Together they cover a rectangle of area that this function divides
+ *	into horizontal bands where points are covered only by one region
+ *	or by both. For the first case, the nonOverlapFunc is called with
+ *	each the band and the band's upper and lower extents. For the
+ *	second, the overlapFunc is called to process the entire band. It
+ *	is responsible for clipping the rectangles in the band, though
+ *	this function provides the boundaries.
+ *	At the end of each band, the new region is coalesced, if possible,
+ *	to reduce the number of rectangles in the region.
+ *
+ *-----------------------------------------------------------------------
+ */
+/* static void*/
+static void
+miRegionOp(newReg, reg1, reg2, overlapFunc,  nonOverlap1Func, nonOverlap2Func)
+    register Region 	newReg;	    	    	/* Place to store result */
+    Region	  	reg1;	    	    	/* First region in operation */
+    Region	  	reg2;	    	    	/* 2d region in operation */
+    void    	  	(*overlapFunc)();   	/* Function to call for over-
+						 * lapping bands */
+    void    	  	(*nonOverlap1Func)();	/* Function to call for non-
+						 * overlapping bands in region
+						 * 1 */
+    void    	  	(*nonOverlap2Func)();	/* Function to call for non-
+						 * overlapping bands in region
+						 * 2 */
+{
+    register BoxPtr	r1; 	    	    	/* Pointer into first region */
+    register BoxPtr	r2; 	    	    	/* Pointer into 2d region */
+    BoxPtr  	  	r1End;	    	    	/* End of 1st region */
+    BoxPtr  	  	r2End;	    	    	/* End of 2d region */
+    register short  	ybot;	    	    	/* Bottom of intersection */
+    register short  	ytop;	    	    	/* Top of intersection */
+    BoxPtr  	  	oldRects;   	    	/* Old rects for newReg */
+    int	    	  	prevBand;   	    	/* Index of start of
+						 * previous band in newReg */
+    int	    	  	curBand;    	    	/* Index of start of current
+						 * band in newReg */
+    register BoxPtr 	r1BandEnd;  	    	/* End of current band in r1 */
+    register BoxPtr 	r2BandEnd;  	    	/* End of current band in r2 */
+    short     	  	top;	    	    	/* Top of non-overlapping
+						 * band */
+    short     	  	bot;	    	    	/* Bottom of non-overlapping
+						 * band */
+    
+    /*
+     * Initialization:
+     *	set r1, r2, r1End and r2End appropriately, preserve the important
+     * parts of the destination region until the end in case it's one of
+     * the two source regions, then mark the "new" region empty, allocating
+     * another array of rectangles for it to use.
+     */
+    r1 = reg1->rects;
+    r2 = reg2->rects;
+    r1End = r1 + reg1->numRects;
+    r2End = r2 + reg2->numRects;
+    
+    oldRects = newReg->rects;
+    
+    EMPTY_REGION(newReg);
+
+    /*
+     * Allocate a reasonable number of rectangles for the new region. The idea
+     * is to allocate enough so the individual functions don't need to
+     * reallocate and copy the array, which is time consuming, yet we don't
+     * have to worry about using too much memory. I hope to be able to
+     * nuke the Xrealloc() at the end of this function eventually.
+     */
+    newReg->size = max(reg1->numRects,reg2->numRects) * 2;
+
+    if (! (newReg->rects = (BoxPtr)
+	   Xmalloc ((unsigned) (sizeof(BoxRec) * newReg->size)))) {
+	newReg->size = 0;
+	return;
+    }
+    
+    /*
+     * Initialize ybot and ytop.
+     * In the upcoming loop, ybot and ytop serve different functions depending
+     * on whether the band being handled is an overlapping or non-overlapping
+     * band.
+     * 	In the case of a non-overlapping band (only one of the regions
+     * has points in the band), ybot is the bottom of the most recent
+     * intersection and thus clips the top of the rectangles in that band.
+     * ytop is the top of the next intersection between the two regions and
+     * serves to clip the bottom of the rectangles in the current band.
+     *	For an overlapping band (where the two regions intersect), ytop clips
+     * the top of the rectangles of both regions and ybot clips the bottoms.
+     */
+    if (reg1->extents.y1 < reg2->extents.y1)
+	ybot = reg1->extents.y1;
+    else
+	ybot = reg2->extents.y1;
+    
+    /*
+     * prevBand serves to mark the start of the previous band so rectangles
+     * can be coalesced into larger rectangles. qv. miCoalesce, above.
+     * In the beginning, there is no previous band, so prevBand == curBand
+     * (curBand is set later on, of course, but the first band will always
+     * start at index 0). prevBand and curBand must be indices because of
+     * the possible expansion, and resultant moving, of the new region's
+     * array of rectangles.
+     */
+    prevBand = 0;
+    
+    do
+    {
+	curBand = newReg->numRects;
+
+	/*
+	 * This algorithm proceeds one source-band (as opposed to a
+	 * destination band, which is determined by where the two regions
+	 * intersect) at a time. r1BandEnd and r2BandEnd serve to mark the
+	 * rectangle after the last one in the current band for their
+	 * respective regions.
+	 */
+	r1BandEnd = r1;
+	while ((r1BandEnd != r1End) && (r1BandEnd->y1 == r1->y1))
+	{
+	    r1BandEnd++;
+	}
+	
+	r2BandEnd = r2;
+	while ((r2BandEnd != r2End) && (r2BandEnd->y1 == r2->y1))
+	{
+	    r2BandEnd++;
+	}
+	
+	/*
+	 * First handle the band that doesn't intersect, if any.
+	 *
+	 * Note that attention is restricted to one band in the
+	 * non-intersecting region at once, so if a region has n
+	 * bands between the current position and the next place it overlaps
+	 * the other, this entire loop will be passed through n times.
+	 */
+	if (r1->y1 < r2->y1)
+	{
+	    top = max(r1->y1,ybot);
+	    bot = min(r1->y2,r2->y1);
+
+	    if ((top != bot) && (nonOverlap1Func != (void (*)())NULL))
+	    {
+		(* nonOverlap1Func) (newReg, r1, r1BandEnd, top, bot);
+	    }
+
+	    ytop = r2->y1;
+	}
+	else if (r2->y1 < r1->y1)
+	{
+	    top = max(r2->y1,ybot);
+	    bot = min(r2->y2,r1->y1);
+
+	    if ((top != bot) && (nonOverlap2Func != (void (*)())NULL))
+	    {
+		(* nonOverlap2Func) (newReg, r2, r2BandEnd, top, bot);
+	    }
+
+	    ytop = r1->y1;
+	}
+	else
+	{
+	    ytop = r1->y1;
+	}
+
+	/*
+	 * If any rectangles got added to the region, try and coalesce them
+	 * with rectangles from the previous band. Note we could just do
+	 * this test in miCoalesce, but some machines incur a not
+	 * inconsiderable cost for function calls, so...
+	 */
+	if (newReg->numRects != curBand)
+	{
+	    prevBand = miCoalesce (newReg, prevBand, curBand);
+	}
+
+	/*
+	 * Now see if we've hit an intersecting band. The two bands only
+	 * intersect if ybot > ytop
+	 */
+	ybot = min(r1->y2, r2->y2);
+	curBand = newReg->numRects;
+	if (ybot > ytop)
+	{
+	    (* overlapFunc) (newReg, r1, r1BandEnd, r2, r2BandEnd, ytop, ybot);
+
+	}
+	
+	if (newReg->numRects != curBand)
+	{
+	    prevBand = miCoalesce (newReg, prevBand, curBand);
+	}
+
+	/*
+	 * If we've finished with a band (y2 == ybot) we skip forward
+	 * in the region to the next band.
+	 */
+	if (r1->y2 == ybot)
+	{
+	    r1 = r1BandEnd;
+	}
+	if (r2->y2 == ybot)
+	{
+	    r2 = r2BandEnd;
+	}
+    } while ((r1 != r1End) && (r2 != r2End));
+
+    /*
+     * Deal with whichever region still has rectangles left.
+     */
+    curBand = newReg->numRects;
+    if (r1 != r1End)
+    {
+	if (nonOverlap1Func != (void (*)())NULL)
+	{
+	    do
+	    {
+		r1BandEnd = r1;
+		while ((r1BandEnd < r1End) && (r1BandEnd->y1 == r1->y1))
+		{
+		    r1BandEnd++;
+		}
+		(* nonOverlap1Func) (newReg, r1, r1BandEnd,
+				     max(r1->y1,ybot), r1->y2);
+		r1 = r1BandEnd;
+	    } while (r1 != r1End);
+	}
+    }
+    else if ((r2 != r2End) && (nonOverlap2Func != (void (*)())NULL))
+    {
+	do
+	{
+	    r2BandEnd = r2;
+	    while ((r2BandEnd < r2End) && (r2BandEnd->y1 == r2->y1))
+	    {
+		 r2BandEnd++;
+	    }
+	    (* nonOverlap2Func) (newReg, r2, r2BandEnd,
+				max(r2->y1,ybot), r2->y2);
+	    r2 = r2BandEnd;
+	} while (r2 != r2End);
+    }
+
+    if (newReg->numRects != curBand)
+    {
+	(void) miCoalesce (newReg, prevBand, curBand);
+    }
+
+    /*
+     * A bit of cleanup. To keep regions from growing without bound,
+     * we shrink the array of rectangles to match the new number of
+     * rectangles in the region. This never goes to 0, however...
+     *
+     * Only do this stuff if the number of rectangles allocated is more than
+     * twice the number of rectangles in the region (a simple optimization...).
+     */
+    if (newReg->numRects < (newReg->size >> 1))
+    {
+	if (REGION_NOT_EMPTY(newReg))
+	{
+	    BoxPtr prev_rects = newReg->rects;
+	    newReg->size = newReg->numRects;
+	    newReg->rects = (BoxPtr) Xrealloc ((char *) newReg->rects,
+				   (unsigned) (sizeof(BoxRec) * newReg->size));
+	    if (! newReg->rects)
+		newReg->rects = prev_rects;
+	}
+	else
+	{
+	    /*
+	     * No point in doing the extra work involved in an Xrealloc if
+	     * the region is empty
+	     */
+	    newReg->size = 1;
+	    Xfree((char *) newReg->rects);
+	    newReg->rects = (BoxPtr) Xmalloc(sizeof(BoxRec));
+	}
+    }
+    Xfree ((char *) oldRects);
+    return;
+}
+
+
+/*======================================================================
+ *	    Region Union
+ *====================================================================*/
+
+/*-
+ *-----------------------------------------------------------------------
+ * miUnionNonO --
+ *	Handle a non-overlapping band for the union operation. Just
+ *	Adds the rectangles into the region. Doesn't have to check for
+ *	subsumption or anything.
+ *
+ * Results:
+ *	None.
+ *
+ * Side Effects:
+ *	pReg->numRects is incremented and the final rectangles overwritten
+ *	with the rectangles we're passed.
+ *
+ *-----------------------------------------------------------------------
+ */
+/* static void*/
+static int
+miUnionNonO (pReg, r, rEnd, y1, y2)
+    register Region	pReg;
+    register BoxPtr	r;
+    BoxPtr  	  	rEnd;
+    register short  	y1;
+    register short  	y2;
+{
+    register BoxPtr	pNextRect;
+
+    pNextRect = &pReg->rects[pReg->numRects];
+
+    assert(y1 < y2);
+
+    while (r != rEnd)
+    {
+	assert(r->x1 < r->x2);
+	MEMCHECK(pReg, pNextRect, pReg->rects);
+	pNextRect->x1 = r->x1;
+	pNextRect->y1 = y1;
+	pNextRect->x2 = r->x2;
+	pNextRect->y2 = y2;
+	pReg->numRects += 1;
+	pNextRect++;
+
+	assert(pReg->numRects<=pReg->size);
+	r++;
+    }
+    return 0;	/* lint */
+}
+
+
+/*-
+ *-----------------------------------------------------------------------
+ * miUnionO --
+ *	Handle an overlapping band for the union operation. Picks the
+ *	left-most rectangle each time and merges it into the region.
+ *
+ * Results:
+ *	None.
+ *
+ * Side Effects:
+ *	Rectangles are overwritten in pReg->rects and pReg->numRects will
+ *	be changed.
+ *
+ *-----------------------------------------------------------------------
+ */
+
+/* static void*/
+static int
+miUnionO (pReg, r1, r1End, r2, r2End, y1, y2)
+    register Region	pReg;
+    register BoxPtr	r1;
+    BoxPtr  	  	r1End;
+    register BoxPtr	r2;
+    BoxPtr  	  	r2End;
+    register short	y1;
+    register short	y2;
+{
+    register BoxPtr	pNextRect;
+    
+    pNextRect = &pReg->rects[pReg->numRects];
+
+#define MERGERECT(r) \
+    if ((pReg->numRects != 0) &&  \
+	(pNextRect[-1].y1 == y1) &&  \
+	(pNextRect[-1].y2 == y2) &&  \
+	(pNextRect[-1].x2 >= r->x1))  \
+    {  \
+	if (pNextRect[-1].x2 < r->x2)  \
+	{  \
+	    pNextRect[-1].x2 = r->x2;  \
+	    assert(pNextRect[-1].x1<pNextRect[-1].x2); \
+	}  \
+    }  \
+    else  \
+    {  \
+	MEMCHECK(pReg, pNextRect, pReg->rects);  \
+	pNextRect->y1 = y1;  \
+	pNextRect->y2 = y2;  \
+	pNextRect->x1 = r->x1;  \
+	pNextRect->x2 = r->x2;  \
+	pReg->numRects += 1;  \
+        pNextRect += 1;  \
+    }  \
+    assert(pReg->numRects<=pReg->size);\
+    r++;
+    
+    assert (y1<y2);
+    while ((r1 != r1End) && (r2 != r2End))
+    {
+	if (r1->x1 < r2->x1)
+	{
+	    MERGERECT(r1);
+	}
+	else
+	{
+	    MERGERECT(r2);
+	}
+    }
+    
+    if (r1 != r1End)
+    {
+	do
+	{
+	    MERGERECT(r1);
+	} while (r1 != r1End);
+    }
+    else while (r2 != r2End)
+    {
+	MERGERECT(r2);
+    }
+    return 0;	/* lint */
+}
+
+int
+XUnionRegion(reg1, reg2, newReg)
+    Region 	  reg1;
+    Region	  reg2;             /* source regions     */
+    Region 	  newReg;                  /* destination Region */
+{
+    /*  checks all the simple cases */
+
+    /*
+     * Region 1 and 2 are the same or region 1 is empty
+     */
+    if ( (reg1 == reg2) || (!(reg1->numRects)) )
+    {
+        if (newReg != reg2)
+            miRegionCopy(newReg, reg2);
+        return 1;
+    }
+
+    /*
+     * if nothing to union (region 2 empty)
+     */
+    if (!(reg2->numRects))
+    {
+        if (newReg != reg1)
+            miRegionCopy(newReg, reg1);
+        return 1;
+    }
+
+    /*
+     * Region 1 completely subsumes region 2
+     */
+    if ((reg1->numRects == 1) && 
+	(reg1->extents.x1 <= reg2->extents.x1) &&
+	(reg1->extents.y1 <= reg2->extents.y1) &&
+	(reg1->extents.x2 >= reg2->extents.x2) &&
+	(reg1->extents.y2 >= reg2->extents.y2))
+    {
+        if (newReg != reg1)
+            miRegionCopy(newReg, reg1);
+        return 1;
+    }
+
+    /*
+     * Region 2 completely subsumes region 1
+     */
+    if ((reg2->numRects == 1) && 
+	(reg2->extents.x1 <= reg1->extents.x1) &&
+	(reg2->extents.y1 <= reg1->extents.y1) &&
+	(reg2->extents.x2 >= reg1->extents.x2) &&
+	(reg2->extents.y2 >= reg1->extents.y2))
+    {
+        if (newReg != reg2)
+            miRegionCopy(newReg, reg2);
+        return 1;
+    }
+
+    miRegionOp (newReg, reg1, reg2, (voidProcp) miUnionO, 
+    		(voidProcp) miUnionNonO, (voidProcp) miUnionNonO);
+
+    newReg->extents.x1 = min(reg1->extents.x1, reg2->extents.x1);
+    newReg->extents.y1 = min(reg1->extents.y1, reg2->extents.y1);
+    newReg->extents.x2 = max(reg1->extents.x2, reg2->extents.x2);
+    newReg->extents.y2 = max(reg1->extents.y2, reg2->extents.y2);
+
+    return 1;
+}
+
+
+/*======================================================================
+ * 	    	  Region Subtraction
+ *====================================================================*/
+
+/*-
+ *-----------------------------------------------------------------------
+ * miSubtractNonO --
+ *	Deal with non-overlapping band for subtraction. Any parts from
+ *	region 2 we discard. Anything from region 1 we add to the region.
+ *
+ * Results:
+ *	None.
+ *
+ * Side Effects:
+ *	pReg may be affected.
+ *
+ *-----------------------------------------------------------------------
+ */
+/* static void*/
+static int
+miSubtractNonO1 (pReg, r, rEnd, y1, y2)
+    register Region	pReg;
+    register BoxPtr	r;
+    BoxPtr  	  	rEnd;
+    register short  	y1;
+    register short   	y2;
+{
+    register BoxPtr	pNextRect;
+	
+    pNextRect = &pReg->rects[pReg->numRects];
+	
+    assert(y1<y2);
+
+    while (r != rEnd)
+    {
+	assert(r->x1<r->x2);
+	MEMCHECK(pReg, pNextRect, pReg->rects);
+	pNextRect->x1 = r->x1;
+	pNextRect->y1 = y1;
+	pNextRect->x2 = r->x2;
+	pNextRect->y2 = y2;
+	pReg->numRects += 1;
+	pNextRect++;
+
+	assert(pReg->numRects <= pReg->size);
+
+	r++;
+    }
+    return 0;	/* lint */
+}
+
+/*-
+ *-----------------------------------------------------------------------
+ * miSubtractO --
+ *	Overlapping band subtraction. x1 is the left-most point not yet
+ *	checked.
+ *
+ * Results:
+ *	None.
+ *
+ * Side Effects:
+ *	pReg may have rectangles added to it.
+ *
+ *-----------------------------------------------------------------------
+ */
+/* static void*/
+static int
+miSubtractO (pReg, r1, r1End, r2, r2End, y1, y2)
+    register Region	pReg;
+    register BoxPtr	r1;
+    BoxPtr  	  	r1End;
+    register BoxPtr	r2;
+    BoxPtr  	  	r2End;
+    register short  	y1;
+    register short  	y2;
+{
+    register BoxPtr	pNextRect;
+    register int  	x1;
+    
+    x1 = r1->x1;
+    
+    assert(y1<y2);
+    pNextRect = &pReg->rects[pReg->numRects];
+
+    while ((r1 != r1End) && (r2 != r2End))
+    {
+	if (r2->x2 <= x1)
+	{
+	    /*
+	     * Subtrahend missed the boat: go to next subtrahend.
+	     */
+	    r2++;
+	}
+	else if (r2->x1 <= x1)
+	{
+	    /*
+	     * Subtrahend preceeds minuend: nuke left edge of minuend.
+	     */
+	    x1 = r2->x2;
+	    if (x1 >= r1->x2)
+	    {
+		/*
+		 * Minuend completely covered: advance to next minuend and
+		 * reset left fence to edge of new minuend.
+		 */
+		r1++;
+		if (r1 != r1End)
+		    x1 = r1->x1;
+	    }
+	    else
+	    {
+		/*
+		 * Subtrahend now used up since it doesn't extend beyond
+		 * minuend
+		 */
+		r2++;
+	    }
+	}
+	else if (r2->x1 < r1->x2)
+	{
+	    /*
+	     * Left part of subtrahend covers part of minuend: add uncovered
+	     * part of minuend to region and skip to next subtrahend.
+	     */
+	    assert(x1<r2->x1);
+	    MEMCHECK(pReg, pNextRect, pReg->rects);
+	    pNextRect->x1 = x1;
+	    pNextRect->y1 = y1;
+	    pNextRect->x2 = r2->x1;
+	    pNextRect->y2 = y2;
+	    pReg->numRects += 1;
+	    pNextRect++;
+
+	    assert(pReg->numRects<=pReg->size);
+
+	    x1 = r2->x2;
+	    if (x1 >= r1->x2)
+	    {
+		/*
+		 * Minuend used up: advance to new...
+		 */
+		r1++;
+		if (r1 != r1End)
+		    x1 = r1->x1;
+	    }
+	    else
+	    {
+		/*
+		 * Subtrahend used up
+		 */
+		r2++;
+	    }
+	}
+	else
+	{
+	    /*
+	     * Minuend used up: add any remaining piece before advancing.
+	     */
+	    if (r1->x2 > x1)
+	    {
+		MEMCHECK(pReg, pNextRect, pReg->rects);
+		pNextRect->x1 = x1;
+		pNextRect->y1 = y1;
+		pNextRect->x2 = r1->x2;
+		pNextRect->y2 = y2;
+		pReg->numRects += 1;
+		pNextRect++;
+		assert(pReg->numRects<=pReg->size);
+	    }
+	    r1++;
+            if (r1 != r1End)
+              x1 = r1->x1;
+	}
+    }
+
+    /*
+     * Add remaining minuend rectangles to region.
+     */
+    while (r1 != r1End)
+    {
+	assert(x1<r1->x2);
+	MEMCHECK(pReg, pNextRect, pReg->rects);
+	pNextRect->x1 = x1;
+	pNextRect->y1 = y1;
+	pNextRect->x2 = r1->x2;
+	pNextRect->y2 = y2;
+	pReg->numRects += 1;
+	pNextRect++;
+
+	assert(pReg->numRects<=pReg->size);
+
+	r1++;
+	if (r1 != r1End)
+	{
+	    x1 = r1->x1;
+	}
+    }
+    return 0;	/* lint */
+}
+	
+/*-
+ *-----------------------------------------------------------------------
+ * miSubtract --
+ *	Subtract regS from regM and leave the result in regD.
+ *	S stands for subtrahend, M for minuend and D for difference.
+ *
+ * Results:
+ *	TRUE.
+ *
+ * Side Effects:
+ *	regD is overwritten.
+ *
+ *-----------------------------------------------------------------------
+ */
+
+int
+XSubtractRegion(regM, regS, regD)
+    Region 	  	regM;
+    Region	  	regS;          
+    register Region	regD;
+{
+   /* check for trivial reject */
+    if ( (!(regM->numRects)) || (!(regS->numRects))  ||
+	(!EXTENTCHECK(&regM->extents, &regS->extents)) )
+    {
+	miRegionCopy(regD, regM);
+        return 1;
+    }
+ 
+    miRegionOp (regD, regM, regS, (voidProcp) miSubtractO, 
+    		(voidProcp) miSubtractNonO1, (voidProcp) NULL);
+
+    /*
+     * Can't alter newReg's extents before we call miRegionOp because
+     * it might be one of the source regions and miRegionOp depends
+     * on the extents of those regions being the unaltered. Besides, this
+     * way there's no checking against rectangles that will be nuked
+     * due to coalescing, so we have to examine fewer rectangles.
+     */
+    miSetExtents (regD);
+    return 1;
+}
+
+int
+XXorRegion( sra, srb, dr )
+    Region sra, srb, dr;
+{
+    Region tra, trb;
+
+    if ((! (tra = XCreateRegion())) || (! (trb = XCreateRegion())))
+	return 0;
+    (void) XSubtractRegion(sra,srb,tra);
+    (void) XSubtractRegion(srb,sra,trb);
+    (void) XUnionRegion(tra,trb,dr);
+    XDestroyRegion(tra);
+    XDestroyRegion(trb);
+    return 0;
+}
+
+/*
+ * Check to see if the region is empty.  Assumes a region is passed 
+ * as a parameter
+ */
+int 
+XEmptyRegion( r )
+    Region r;
+{
+    if( r->numRects == 0 ) return TRUE;
+    else  return FALSE;
+}
+
+/*
+ *	Check to see if two regions are equal	
+ */
+int 
+XEqualRegion( r1, r2 )
+    Region r1, r2;
+{
+    int i;
+
+    if( r1->numRects != r2->numRects ) return FALSE;
+    else if( r1->numRects == 0 ) return TRUE;
+    else if ( r1->extents.x1 != r2->extents.x1 ) return FALSE;
+    else if ( r1->extents.x2 != r2->extents.x2 ) return FALSE;
+    else if ( r1->extents.y1 != r2->extents.y1 ) return FALSE;
+    else if ( r1->extents.y2 != r2->extents.y2 ) return FALSE;
+    else for( i=0; i < r1->numRects; i++ ) {
+    	if ( r1->rects[i].x1 != r2->rects[i].x1 ) return FALSE;
+    	else if ( r1->rects[i].x2 != r2->rects[i].x2 ) return FALSE;
+    	else if ( r1->rects[i].y1 != r2->rects[i].y1 ) return FALSE;
+    	else if ( r1->rects[i].y2 != r2->rects[i].y2 ) return FALSE;
+    }
+    return TRUE;
+}
+
+int 
+XPointInRegion( pRegion, x, y )
+    Region pRegion;
+    int x, y;
+{
+    int i;
+
+    if (pRegion->numRects == 0)
+        return FALSE;
+    if (!INBOX(pRegion->extents, x, y))
+        return FALSE;
+    for (i=0; i<pRegion->numRects; i++)
+    {
+        if (INBOX (pRegion->rects[i], x, y))
+	    return TRUE;
+    }
+    return FALSE;
+}
+
+int 
+XRectInRegion(region, rx, ry, rwidth, rheight)
+    register Region	region;
+    int rx, ry;
+    unsigned int rwidth, rheight;
+{
+    register BoxPtr pbox;
+    register BoxPtr pboxEnd;
+    Box rect;
+    register BoxPtr prect = &rect;
+    int      partIn, partOut;
+
+    prect->x1 = rx;
+    prect->y1 = ry;
+    prect->x2 = rwidth + rx;
+    prect->y2 = rheight + ry;
+    
+    /* this is (just) a useful optimization */
+    if ((region->numRects == 0) || !EXTENTCHECK(&region->extents, prect))
+        return(RectangleOut);
+
+    partOut = FALSE;
+    partIn = FALSE;
+
+    /* can stop when both partOut and partIn are TRUE, or we reach prect->y2 */
+    for (pbox = region->rects, pboxEnd = pbox + region->numRects;
+	 pbox < pboxEnd;
+	 pbox++)
+    {
+
+	if (pbox->y2 <= ry)
+	   continue;	/* getting up to speed or skipping remainder of band */
+
+	if (pbox->y1 > ry)
+	{
+	   partOut = TRUE;	/* missed part of rectangle above */
+	   if (partIn || (pbox->y1 >= prect->y2))
+	      break;
+	   ry = pbox->y1;	/* x guaranteed to be == prect->x1 */
+	}
+
+	if (pbox->x2 <= rx)
+	   continue;		/* not far enough over yet */
+
+	if (pbox->x1 > rx)
+	{
+	   partOut = TRUE;	/* missed part of rectangle to left */
+	   if (partIn)
+	      break;
+	}
+
+	if (pbox->x1 < prect->x2)
+	{
+	    partIn = TRUE;	/* definitely overlap */
+	    if (partOut)
+	       break;
+	}
+
+	if (pbox->x2 >= prect->x2)
+	{
+	   ry = pbox->y2;	/* finished with this band */
+	   if (ry >= prect->y2)
+	      break;
+	   rx = prect->x1;	/* reset x out to left again */
+	} else
+	{
+	    /*
+	     * Because boxes in a band are maximal width, if the first box
+	     * to overlap the rectangle doesn't completely cover it in that
+	     * band, the rectangle must be partially out, since some of it
+	     * will be uncovered in that band. partIn will have been set true
+	     * by now...
+	     */
+	    break;
+	}
+
+    }
+
+    return(partIn ? ((ry < prect->y2) ? RectanglePart : RectangleIn) : 
+		RectangleOut);
+}
diff --git a/common/Xregion/Xregion.dsp b/common/Xregion/Xregion.dsp
new file mode 100644
index 00000000..e30b5180
--- /dev/null
+++ b/common/Xregion/Xregion.dsp
@@ -0,0 +1,132 @@
+# Microsoft Developer Studio Project File - Name="Xregion" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Static Library" 0x0104

+

+CFG=Xregion - Win32 Debug Unicode

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "Xregion.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "Xregion.mak" CFG="Xregion - Win32 Debug Unicode"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "Xregion - Win32 Release" (based on "Win32 (x86) Static Library")

+!MESSAGE "Xregion - Win32 Debug" (based on "Win32 (x86) Static Library")

+!MESSAGE "Xregion - Win32 Debug Unicode" (based on "Win32 (x86) Static Library")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "Xregion - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "..\Release"

+# PROP Intermediate_Dir "..\Release\Xregion"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_MBCS" /D "_LIB" /YX /FD /c

+# ADD CPP /nologo /MT /W3 /GX /O2 /I ".." /D "NDEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x809 /d "NDEBUG"

+# ADD RSC /l 0x809 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ELSEIF  "$(CFG)" == "Xregion - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "..\Debug"

+# PROP Intermediate_Dir "..\Debug\Xregion"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "_LIB" /YX /FD /GZ /c

+# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I ".." /D "_DEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /FD /GZ /c

+# SUBTRACT CPP /YX

+# ADD BASE RSC /l 0x809 /d "_DEBUG"

+# ADD RSC /l 0x809 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ELSEIF  "$(CFG)" == "Xregion - Win32 Debug Unicode"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Xregion___Win32_Debug_Unicode"

+# PROP BASE Intermediate_Dir "Xregion___Win32_Debug_Unicode"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "..\Debug_Unicode"

+# PROP Intermediate_Dir "..\Debug_Unicode\Xregion"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I ".." /D "_DEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /FD /GZ /c

+# SUBTRACT BASE CPP /YX

+# ADD CPP /nologo /MTd /W3 /Gm /GX /ZI /Od /I ".." /D "_LIB" /D "_DEBUG" /D "WIN32" /D "_UNICODE" /D "UNICODE" /FD /GZ /c

+# SUBTRACT CPP /YX

+# ADD BASE RSC /l 0x809 /d "_DEBUG"

+# ADD RSC /l 0x809 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ENDIF 

+

+# Begin Target

+

+# Name "Xregion - Win32 Release"

+# Name "Xregion - Win32 Debug"

+# Name "Xregion - Win32 Debug Unicode"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=.\Region.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# Begin Source File

+

+SOURCE=.\region.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\Xregion.h

+# End Source File

+# End Group

+# End Target

+# End Project

diff --git a/common/Xregion/Xregion.h b/common/Xregion/Xregion.h
new file mode 100644
index 00000000..e8c9a4f9
--- /dev/null
+++ b/common/Xregion/Xregion.h
@@ -0,0 +1,212 @@
+/* $Xorg: Xutil.h,v 1.8 2001/02/09 02:03:39 xorgcvs Exp $ */
+
+/***********************************************************
+
+Copyright 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+/* $XFree86: xc/lib/X11/Xutil.h,v 3.4 2001/12/14 19:54:10 dawes Exp $ */
+
+#ifndef _XREGION_H_
+#define _XREGION_H_
+
+// - Faked defines to fool the X11 region code
+
+#include <stdlib.h>
+#include <string.h>
+
+#define Bool int
+#define Xmalloc malloc
+#define Xfree free
+#define Xrealloc realloc
+
+#define NeedFunctionPrototypes 1
+
+// - Cribbed from Xlib.h
+
+typedef struct {
+    short x, y;
+} XPoint;
+
+typedef struct {
+    short x, y;
+    unsigned short width, height;
+} XRectangle;
+
+/*
+ * opaque reference to Region data type 
+ */
+typedef struct _XRegion *Region; 
+
+/* Return values from XRectInRegion() */
+ 
+#define RectangleOut 0
+#define RectangleIn  1
+#define RectanglePart 2
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int XClipBox(
+#if NeedFunctionPrototypes
+    Region		/* r */,
+    XRectangle*		/* rect_return */
+#endif
+);
+
+extern Region XCreateRegion(
+#if NeedFunctionPrototypes
+    void
+#endif
+);
+
+extern const char *XDefaultString (void);
+
+extern int XDestroyRegion(
+#if NeedFunctionPrototypes
+    Region		/* r */
+#endif
+);
+
+extern int XEmptyRegion(
+#if NeedFunctionPrototypes
+    Region		/* r */
+#endif
+);
+
+extern int XEqualRegion(
+#if NeedFunctionPrototypes
+    Region		/* r1 */,
+    Region		/* r2 */
+#endif
+);
+
+extern int XIntersectRegion(
+#if NeedFunctionPrototypes
+    Region		/* sra */,
+    Region		/* srb */,
+    Region		/* dr_return */
+#endif
+);
+
+extern int XOffsetRegion(
+#if NeedFunctionPrototypes
+    Region		/* r */,
+    int			/* dx */,
+    int			/* dy */
+#endif
+);
+
+extern Bool XPointInRegion(
+#if NeedFunctionPrototypes
+    Region		/* r */,
+    int			/* x */,
+    int			/* y */
+#endif
+);
+
+extern Region XPolygonRegion(
+#if NeedFunctionPrototypes
+    XPoint*		/* points */,
+    int			/* n */,
+    int			/* fill_rule */
+#endif
+);
+
+extern int XRectInRegion(
+#if NeedFunctionPrototypes
+    Region		/* r */,
+    int			/* x */,
+    int			/* y */,
+    unsigned int	/* width */,
+    unsigned int	/* height */
+#endif
+);
+
+extern int XShrinkRegion(
+#if NeedFunctionPrototypes
+    Region		/* r */,
+    int			/* dx */,
+    int			/* dy */
+#endif
+);
+
+extern int XSubtractRegion(
+#if NeedFunctionPrototypes
+    Region		/* sra */,
+    Region		/* srb */,
+    Region		/* dr_return */
+#endif
+);
+
+extern int XUnionRectWithRegion(
+#if NeedFunctionPrototypes
+    XRectangle*		/* rectangle */,
+    Region		/* src_region */,
+    Region		/* dest_region_return */
+#endif
+);
+
+extern int XUnionRegion(
+#if NeedFunctionPrototypes
+    Region		/* sra */,
+    Region		/* srb */,
+    Region		/* dr_return */
+#endif
+);
+
+extern int XXorRegion(
+#if NeedFunctionPrototypes
+    Region		/* sra */,
+    Region		/* srb */,
+    Region		/* dr_return */
+#endif
+);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif /* _XUTIL_H_ */
diff --git a/common/Xregion/region.h b/common/Xregion/region.h
new file mode 100644
index 00000000..2ddf12ca
--- /dev/null
+++ b/common/Xregion/region.h
@@ -0,0 +1,190 @@
+/* $Xorg: region.h,v 1.4 2001/02/09 02:03:40 xorgcvs Exp $ */
+/************************************************************************
+
+Copyright 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+************************************************************************/
+
+#ifndef _XREGION_H
+#define _XREGION_H
+
+typedef struct {
+    short x1, x2, y1, y2;
+} Box, BOX, BoxRec, *BoxPtr;
+
+typedef struct {
+    short x, y, width, height;
+}RECTANGLE, RectangleRec, *RectanglePtr;
+
+#define TRUE 1
+#define FALSE 0
+#define MAXSHORT 32767
+#define MINSHORT -MAXSHORT
+#ifndef MAX
+#define MAX(a,b) (((a) > (b)) ? (a) : (b))
+#endif
+#ifndef MIN
+#define MIN(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
+
+/* 
+ *   clip region
+ */
+
+typedef struct _XRegion {
+    long size;
+    long numRects;
+    BOX *rects;
+    BOX extents;
+} REGION;
+
+/* Xutil.h contains the declaration: 
+ * typedef struct _XRegion *Region; 
+ */   
+
+/*  1 if two BOXs overlap.
+ *  0 if two BOXs do not overlap.
+ *  Remember, x2 and y2 are not in the region 
+ */
+#define EXTENTCHECK(r1, r2) \
+	((r1)->x2 > (r2)->x1 && \
+	 (r1)->x1 < (r2)->x2 && \
+	 (r1)->y2 > (r2)->y1 && \
+	 (r1)->y1 < (r2)->y2)
+
+/*
+ *  update region extents
+ */
+#define EXTENTS(r,idRect){\
+            if((r)->x1 < (idRect)->extents.x1)\
+              (idRect)->extents.x1 = (r)->x1;\
+            if((r)->y1 < (idRect)->extents.y1)\
+              (idRect)->extents.y1 = (r)->y1;\
+            if((r)->x2 > (idRect)->extents.x2)\
+              (idRect)->extents.x2 = (r)->x2;\
+            if((r)->y2 > (idRect)->extents.y2)\
+              (idRect)->extents.y2 = (r)->y2;\
+        }
+
+/*
+ *   Check to see if there is enough memory in the present region.
+ */
+#define MEMCHECK(reg, rect, firstrect){\
+        if ((reg)->numRects >= ((reg)->size - 1)){\
+          (firstrect) = (BOX *) Xrealloc \
+          ((char *)(firstrect), (unsigned) (2 * (sizeof(BOX)) * ((reg)->size)));\
+          if ((firstrect) == 0)\
+            return(0);\
+          (reg)->size *= 2;\
+          (rect) = &(firstrect)[(reg)->numRects];\
+         }\
+       }
+
+/*  this routine checks to see if the previous rectangle is the same
+ *  or subsumes the new rectangle to add.
+ */
+
+#define CHECK_PREVIOUS(Reg, R, Rx1, Ry1, Rx2, Ry2)\
+               (!(((Reg)->numRects > 0)&&\
+                  ((R-1)->y1 == (Ry1)) &&\
+                  ((R-1)->y2 == (Ry2)) &&\
+                  ((R-1)->x1 <= (Rx1)) &&\
+                  ((R-1)->x2 >= (Rx2))))
+
+/*  add a rectangle to the given Region */
+#define ADDRECT(reg, r, rx1, ry1, rx2, ry2){\
+    if (((rx1) < (rx2)) && ((ry1) < (ry2)) &&\
+        CHECK_PREVIOUS((reg), (r), (rx1), (ry1), (rx2), (ry2))){\
+              (r)->x1 = (rx1);\
+              (r)->y1 = (ry1);\
+              (r)->x2 = (rx2);\
+              (r)->y2 = (ry2);\
+              EXTENTS((r), (reg));\
+              (reg)->numRects++;\
+              (r)++;\
+            }\
+        }
+
+
+
+/*  add a rectangle to the given Region */
+#define ADDRECTNOX(reg, r, rx1, ry1, rx2, ry2){\
+            if ((rx1 < rx2) && (ry1 < ry2) &&\
+                CHECK_PREVIOUS((reg), (r), (rx1), (ry1), (rx2), (ry2))){\
+              (r)->x1 = (rx1);\
+              (r)->y1 = (ry1);\
+              (r)->x2 = (rx2);\
+              (r)->y2 = (ry2);\
+              (reg)->numRects++;\
+              (r)++;\
+            }\
+        }
+
+#define EMPTY_REGION(pReg) pReg->numRects = 0
+
+#define REGION_NOT_EMPTY(pReg) pReg->numRects
+
+#define INBOX(r, x, y) \
+      ( ( ((r).x2 >  x)) && \
+        ( ((r).x1 <= x)) && \
+        ( ((r).y2 >  y)) && \
+        ( ((r).y1 <= y)) )
+
+/*
+ * number of points to buffer before sending them off
+ * to scanlines() :  Must be an even number
+ */
+#define NUMPTSTOBUFFER 200
+
+/*
+ * used to allocate buffers for points and link
+ * the buffers together
+ */
+typedef struct _POINTBLOCK {
+    XPoint pts[NUMPTSTOBUFFER];
+    struct _POINTBLOCK *next;
+} POINTBLOCK;
+
+#endif
diff --git a/common/javabin/index.vnc b/common/javabin/index.vnc
new file mode 100644
index 00000000..aecb6131
--- /dev/null
+++ b/common/javabin/index.vnc
@@ -0,0 +1,13 @@
+<HTML>
+<HEAD>
+<TITLE>
+VNC viewer for Java
+</TITLE>
+</HEAD>
+<BODY>
+<APPLET CODE=vncviewer/VNCViewer.class ARCHIVE=vncviewer.jar
+        WIDTH=400 HEIGHT=250>
+<PARAM name="port" value="$PORT">
+</APPLET>
+</BODY>
+</HTML>
diff --git a/common/javabin/logo150x150.gif b/common/javabin/logo150x150.gif
new file mode 100644
index 00000000..f1699ba5
--- /dev/null
+++ b/common/javabin/logo150x150.gif
diff --git a/common/javabin/vncviewer.jar b/common/javabin/vncviewer.jar
new file mode 100644
index 00000000..3c92b5bb
--- /dev/null
+++ b/common/javabin/vncviewer.jar
diff --git a/common/jpeg/README b/common/jpeg/README
new file mode 100644
index 00000000..86cc2066
--- /dev/null
+++ b/common/jpeg/README
@@ -0,0 +1,385 @@
+The Independent JPEG Group's JPEG software
+==========================================
+
+README for release 6b of 27-Mar-1998
+====================================
+
+This distribution contains the sixth public release of the Independent JPEG
+Group's free JPEG software.  You are welcome to redistribute this software and
+to use it for any purpose, subject to the conditions under LEGAL ISSUES, below.
+
+Serious users of this software (particularly those incorporating it into
+larger programs) should contact IJG at jpeg-info@uunet.uu.net to be added to
+our electronic mailing list.  Mailing list members are notified of updates
+and have a chance to participate in technical discussions, etc.
+
+This software is the work of Tom Lane, Philip Gladstone, Jim Boucher,
+Lee Crocker, Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi,
+Guido Vollbeding, Ge' Weijers, and other members of the Independent JPEG
+Group.
+
+IJG is not affiliated with the official ISO JPEG standards committee.
+
+
+DOCUMENTATION ROADMAP
+=====================
+
+This file contains the following sections:
+
+OVERVIEW            General description of JPEG and the IJG software.
+LEGAL ISSUES        Copyright, lack of warranty, terms of distribution.
+REFERENCES          Where to learn more about JPEG.
+ARCHIVE LOCATIONS   Where to find newer versions of this software.
+RELATED SOFTWARE    Other stuff you should get.
+FILE FORMAT WARS    Software *not* to get.
+TO DO               Plans for future IJG releases.
+
+Other documentation files in the distribution are:
+
+User documentation:
+  install.doc       How to configure and install the IJG software.
+  usage.doc         Usage instructions for cjpeg, djpeg, jpegtran,
+                    rdjpgcom, and wrjpgcom.
+  *.1               Unix-style man pages for programs (same info as usage.doc).
+  wizard.doc        Advanced usage instructions for JPEG wizards only.
+  change.log        Version-to-version change highlights.
+Programmer and internal documentation:
+  libjpeg.doc       How to use the JPEG library in your own programs.
+  example.c         Sample code for calling the JPEG library.
+  structure.doc     Overview of the JPEG library's internal structure.
+  filelist.doc      Road map of IJG files.
+  coderules.doc     Coding style rules --- please read if you contribute code.
+
+Please read at least the files install.doc and usage.doc.  Useful information
+can also be found in the JPEG FAQ (Frequently Asked Questions) article.  See
+ARCHIVE LOCATIONS below to find out where to obtain the FAQ article.
+
+If you want to understand how the JPEG code works, we suggest reading one or
+more of the REFERENCES, then looking at the documentation files (in roughly
+the order listed) before diving into the code.
+
+
+OVERVIEW
+========
+
+This package contains C software to implement JPEG image compression and
+decompression.  JPEG (pronounced "jay-peg") is a standardized compression
+method for full-color and gray-scale images.  JPEG is intended for compressing
+"real-world" scenes; line drawings, cartoons and other non-realistic images
+are not its strong suit.  JPEG is lossy, meaning that the output image is not
+exactly identical to the input image.  Hence you must not use JPEG if you
+have to have identical output bits.  However, on typical photographic images,
+very good compression levels can be obtained with no visible change, and
+remarkably high compression levels are possible if you can tolerate a
+low-quality image.  For more details, see the references, or just experiment
+with various compression settings.
+
+This software implements JPEG baseline, extended-sequential, and progressive
+compression processes.  Provision is made for supporting all variants of these
+processes, although some uncommon parameter settings aren't implemented yet.
+For legal reasons, we are not distributing code for the arithmetic-coding
+variants of JPEG; see LEGAL ISSUES.  We have made no provision for supporting
+the hierarchical or lossless processes defined in the standard.
+
+We provide a set of library routines for reading and writing JPEG image files,
+plus two sample applications "cjpeg" and "djpeg", which use the library to
+perform conversion between JPEG and some other popular image file formats.
+The library is intended to be reused in other applications.
+
+In order to support file conversion and viewing software, we have included
+considerable functionality beyond the bare JPEG coding/decoding capability;
+for example, the color quantization modules are not strictly part of JPEG
+decoding, but they are essential for output to colormapped file formats or
+colormapped displays.  These extra functions can be compiled out of the
+library if not required for a particular application.  We have also included
+"jpegtran", a utility for lossless transcoding between different JPEG
+processes, and "rdjpgcom" and "wrjpgcom", two simple applications for
+inserting and extracting textual comments in JFIF files.
+
+The emphasis in designing this software has been on achieving portability and
+flexibility, while also making it fast enough to be useful.  In particular,
+the software is not intended to be read as a tutorial on JPEG.  (See the
+REFERENCES section for introductory material.)  Rather, it is intended to
+be reliable, portable, industrial-strength code.  We do not claim to have
+achieved that goal in every aspect of the software, but we strive for it.
+
+We welcome the use of this software as a component of commercial products.
+No royalty is required, but we do ask for an acknowledgement in product
+documentation, as described under LEGAL ISSUES.
+
+
+LEGAL ISSUES
+============
+
+In plain English:
+
+1. We don't promise that this software works.  (But if you find any bugs,
+   please let us know!)
+2. You can use this software for whatever you want.  You don't have to pay us.
+3. You may not pretend that you wrote this software.  If you use it in a
+   program, you must acknowledge somewhere in your documentation that
+   you've used the IJG code.
+
+In legalese:
+
+The authors make NO WARRANTY or representation, either express or implied,
+with respect to this software, its quality, accuracy, merchantability, or
+fitness for a particular purpose.  This software is provided "AS IS", and you,
+its user, assume the entire risk as to its quality and accuracy.
+
+This software is copyright (C) 1991-1998, Thomas G. Lane.
+All Rights Reserved except as specified below.
+
+Permission is hereby granted to use, copy, modify, and distribute this
+software (or portions thereof) for any purpose, without fee, subject to these
+conditions:
+(1) If any part of the source code for this software is distributed, then this
+README file must be included, with this copyright and no-warranty notice
+unaltered; and any additions, deletions, or changes to the original files
+must be clearly indicated in accompanying documentation.
+(2) If only executable code is distributed, then the accompanying
+documentation must state that "this software is based in part on the work of
+the Independent JPEG Group".
+(3) Permission for use of this software is granted only if the user accepts
+full responsibility for any undesirable consequences; the authors accept
+NO LIABILITY for damages of any kind.
+
+These conditions apply to any software derived from or based on the IJG code,
+not just to the unmodified library.  If you use our work, you ought to
+acknowledge us.
+
+Permission is NOT granted for the use of any IJG author's name or company name
+in advertising or publicity relating to this software or products derived from
+it.  This software may be referred to only as "the Independent JPEG Group's
+software".
+
+We specifically permit and encourage the use of this software as the basis of
+commercial products, provided that all warranty or liability claims are
+assumed by the product vendor.
+
+
+ansi2knr.c is included in this distribution by permission of L. Peter Deutsch,
+sole proprietor of its copyright holder, Aladdin Enterprises of Menlo Park, CA.
+ansi2knr.c is NOT covered by the above copyright and conditions, but instead
+by the usual distribution terms of the Free Software Foundation; principally,
+that you must include source code if you redistribute it.  (See the file
+ansi2knr.c for full details.)  However, since ansi2knr.c is not needed as part
+of any program generated from the IJG code, this does not limit you more than
+the foregoing paragraphs do.
+
+The Unix configuration script "configure" was produced with GNU Autoconf.
+It is copyright by the Free Software Foundation but is freely distributable.
+The same holds for its supporting scripts (config.guess, config.sub,
+ltconfig, ltmain.sh).  Another support script, install-sh, is copyright
+by M.I.T. but is also freely distributable.
+
+It appears that the arithmetic coding option of the JPEG spec is covered by
+patents owned by IBM, AT&T, and Mitsubishi.  Hence arithmetic coding cannot
+legally be used without obtaining one or more licenses.  For this reason,
+support for arithmetic coding has been removed from the free JPEG software.
+(Since arithmetic coding provides only a marginal gain over the unpatented
+Huffman mode, it is unlikely that very many implementations will support it.)
+So far as we are aware, there are no patent restrictions on the remaining
+code.
+
+The IJG distribution formerly included code to read and write GIF files.
+To avoid entanglement with the Unisys LZW patent, GIF reading support has
+been removed altogether, and the GIF writer has been simplified to produce
+"uncompressed GIFs".  This technique does not use the LZW algorithm; the
+resulting GIF files are larger than usual, but are readable by all standard
+GIF decoders.
+
+We are required to state that
+    "The Graphics Interchange Format(c) is the Copyright property of
+    CompuServe Incorporated.  GIF(sm) is a Service Mark property of
+    CompuServe Incorporated."
+
+
+REFERENCES
+==========
+
+We highly recommend reading one or more of these references before trying to
+understand the innards of the JPEG software.
+
+The best short technical introduction to the JPEG compression algorithm is
+	Wallace, Gregory K.  "The JPEG Still Picture Compression Standard",
+	Communications of the ACM, April 1991 (vol. 34 no. 4), pp. 30-44.
+(Adjacent articles in that issue discuss MPEG motion picture compression,
+applications of JPEG, and related topics.)  If you don't have the CACM issue
+handy, a PostScript file containing a revised version of Wallace's article is
+available at ftp://ftp.uu.net/graphics/jpeg/wallace.ps.gz.  The file (actually
+a preprint for an article that appeared in IEEE Trans. Consumer Electronics)
+omits the sample images that appeared in CACM, but it includes corrections
+and some added material.  Note: the Wallace article is copyright ACM and IEEE,
+and it may not be used for commercial purposes.
+
+A somewhat less technical, more leisurely introduction to JPEG can be found in
+"The Data Compression Book" by Mark Nelson and Jean-loup Gailly, published by
+M&T Books (New York), 2nd ed. 1996, ISBN 1-55851-434-1.  This book provides
+good explanations and example C code for a multitude of compression methods
+including JPEG.  It is an excellent source if you are comfortable reading C
+code but don't know much about data compression in general.  The book's JPEG
+sample code is far from industrial-strength, but when you are ready to look
+at a full implementation, you've got one here...
+
+The best full description of JPEG is the textbook "JPEG Still Image Data
+Compression Standard" by William B. Pennebaker and Joan L. Mitchell, published
+by Van Nostrand Reinhold, 1993, ISBN 0-442-01272-1.  Price US$59.95, 638 pp.
+The book includes the complete text of the ISO JPEG standards (DIS 10918-1
+and draft DIS 10918-2).  This is by far the most complete exposition of JPEG
+in existence, and we highly recommend it.
+
+The JPEG standard itself is not available electronically; you must order a
+paper copy through ISO or ITU.  (Unless you feel a need to own a certified
+official copy, we recommend buying the Pennebaker and Mitchell book instead;
+it's much cheaper and includes a great deal of useful explanatory material.)
+In the USA, copies of the standard may be ordered from ANSI Sales at (212)
+642-4900, or from Global Engineering Documents at (800) 854-7179.  (ANSI
+doesn't take credit card orders, but Global does.)  It's not cheap: as of
+1992, ANSI was charging $95 for Part 1 and $47 for Part 2, plus 7%
+shipping/handling.  The standard is divided into two parts, Part 1 being the
+actual specification, while Part 2 covers compliance testing methods.  Part 1
+is titled "Digital Compression and Coding of Continuous-tone Still Images,
+Part 1: Requirements and guidelines" and has document numbers ISO/IEC IS
+10918-1, ITU-T T.81.  Part 2 is titled "Digital Compression and Coding of
+Continuous-tone Still Images, Part 2: Compliance testing" and has document
+numbers ISO/IEC IS 10918-2, ITU-T T.83.
+
+Some extensions to the original JPEG standard are defined in JPEG Part 3,
+a newer ISO standard numbered ISO/IEC IS 10918-3 and ITU-T T.84.  IJG
+currently does not support any Part 3 extensions.
+
+The JPEG standard does not specify all details of an interchangeable file
+format.  For the omitted details we follow the "JFIF" conventions, revision
+1.02.  A copy of the JFIF spec is available from:
+	Literature Department
+	C-Cube Microsystems, Inc.
+	1778 McCarthy Blvd.
+	Milpitas, CA 95035
+	phone (408) 944-6300,  fax (408) 944-6314
+A PostScript version of this document is available by FTP at
+ftp://ftp.uu.net/graphics/jpeg/jfif.ps.gz.  There is also a plain text
+version at ftp://ftp.uu.net/graphics/jpeg/jfif.txt.gz, but it is missing
+the figures.
+
+The TIFF 6.0 file format specification can be obtained by FTP from
+ftp://ftp.sgi.com/graphics/tiff/TIFF6.ps.gz.  The JPEG incorporation scheme
+found in the TIFF 6.0 spec of 3-June-92 has a number of serious problems.
+IJG does not recommend use of the TIFF 6.0 design (TIFF Compression tag 6).
+Instead, we recommend the JPEG design proposed by TIFF Technical Note #2
+(Compression tag 7).  Copies of this Note can be obtained from ftp.sgi.com or
+from ftp://ftp.uu.net/graphics/jpeg/.  It is expected that the next revision
+of the TIFF spec will replace the 6.0 JPEG design with the Note's design.
+Although IJG's own code does not support TIFF/JPEG, the free libtiff library
+uses our library to implement TIFF/JPEG per the Note.  libtiff is available
+from ftp://ftp.sgi.com/graphics/tiff/.
+
+
+ARCHIVE LOCATIONS
+=================
+
+The "official" archive site for this software is ftp.uu.net (Internet
+address 192.48.96.9).  The most recent released version can always be found
+there in directory graphics/jpeg.  This particular version will be archived
+as ftp://ftp.uu.net/graphics/jpeg/jpegsrc.v6b.tar.gz.  If you don't have
+direct Internet access, UUNET's archives are also available via UUCP; contact
+help@uunet.uu.net for information on retrieving files that way.
+
+Numerous Internet sites maintain copies of the UUNET files.  However, only
+ftp.uu.net is guaranteed to have the latest official version.
+
+You can also obtain this software in DOS-compatible "zip" archive format from
+the SimTel archives (ftp://ftp.simtel.net/pub/simtelnet/msdos/graphics/), or
+on CompuServe in the Graphics Support forum (GO CIS:GRAPHSUP), library 12
+"JPEG Tools".  Again, these versions may sometimes lag behind the ftp.uu.net
+release.
+
+The JPEG FAQ (Frequently Asked Questions) article is a useful source of
+general information about JPEG.  It is updated constantly and therefore is
+not included in this distribution.  The FAQ is posted every two weeks to
+Usenet newsgroups comp.graphics.misc, news.answers, and other groups.
+It is available on the World Wide Web at http://www.faqs.org/faqs/jpeg-faq/
+and other news.answers archive sites, including the official news.answers
+archive at rtfm.mit.edu: ftp://rtfm.mit.edu/pub/usenet/news.answers/jpeg-faq/.
+If you don't have Web or FTP access, send e-mail to mail-server@rtfm.mit.edu
+with body
+	send usenet/news.answers/jpeg-faq/part1
+	send usenet/news.answers/jpeg-faq/part2
+
+
+RELATED SOFTWARE
+================
+
+Numerous viewing and image manipulation programs now support JPEG.  (Quite a
+few of them use this library to do so.)  The JPEG FAQ described above lists
+some of the more popular free and shareware viewers, and tells where to
+obtain them on Internet.
+
+If you are on a Unix machine, we highly recommend Jef Poskanzer's free
+PBMPLUS software, which provides many useful operations on PPM-format image
+files.  In particular, it can convert PPM images to and from a wide range of
+other formats, thus making cjpeg/djpeg considerably more useful.  The latest
+version is distributed by the NetPBM group, and is available from numerous
+sites, notably ftp://wuarchive.wustl.edu/graphics/graphics/packages/NetPBM/.
+Unfortunately PBMPLUS/NETPBM is not nearly as portable as the IJG software is;
+you are likely to have difficulty making it work on any non-Unix machine.
+
+A different free JPEG implementation, written by the PVRG group at Stanford,
+is available from ftp://havefun.stanford.edu/pub/jpeg/.  This program
+is designed for research and experimentation rather than production use;
+it is slower, harder to use, and less portable than the IJG code, but it
+is easier to read and modify.  Also, the PVRG code supports lossless JPEG,
+which we do not.  (On the other hand, it doesn't do progressive JPEG.)
+
+
+FILE FORMAT WARS
+================
+
+Some JPEG programs produce files that are not compatible with our library.
+The root of the problem is that the ISO JPEG committee failed to specify a
+concrete file format.  Some vendors "filled in the blanks" on their own,
+creating proprietary formats that no one else could read.  (For example, none
+of the early commercial JPEG implementations for the Macintosh were able to
+exchange compressed files.)
+
+The file format we have adopted is called JFIF (see REFERENCES).  This format
+has been agreed to by a number of major commercial JPEG vendors, and it has
+become the de facto standard.  JFIF is a minimal or "low end" representation.
+We recommend the use of TIFF/JPEG (TIFF revision 6.0 as modified by TIFF
+Technical Note #2) for "high end" applications that need to record a lot of
+additional data about an image.  TIFF/JPEG is fairly new and not yet widely
+supported, unfortunately.
+
+The upcoming JPEG Part 3 standard defines a file format called SPIFF.
+SPIFF is interoperable with JFIF, in the sense that most JFIF decoders should
+be able to read the most common variant of SPIFF.  SPIFF has some technical
+advantages over JFIF, but its major claim to fame is simply that it is an
+official standard rather than an informal one.  At this point it is unclear
+whether SPIFF will supersede JFIF or whether JFIF will remain the de-facto
+standard.  IJG intends to support SPIFF once the standard is frozen, but we
+have not decided whether it should become our default output format or not.
+(In any case, our decoder will remain capable of reading JFIF indefinitely.)
+
+Various proprietary file formats incorporating JPEG compression also exist.
+We have little or no sympathy for the existence of these formats.  Indeed,
+one of the original reasons for developing this free software was to help
+force convergence on common, open format standards for JPEG files.  Don't
+use a proprietary file format!
+
+
+TO DO
+=====
+
+The major thrust for v7 will probably be improvement of visual quality.
+The current method for scaling the quantization tables is known not to be
+very good at low Q values.  We also intend to investigate block boundary
+smoothing, "poor man's variable quantization", and other means of improving
+quality-vs-file-size performance without sacrificing compatibility.
+
+In future versions, we are considering supporting some of the upcoming JPEG
+Part 3 extensions --- principally, variable quantization and the SPIFF file
+format.
+
+As always, speeding things up is of great interest.
+
+Please send bug reports, offers of help, etc. to jpeg-info@uunet.uu.net.
diff --git a/common/jpeg/README_TightVNC.txt b/common/jpeg/README_TightVNC.txt
new file mode 100644
index 00000000..72d502dc
--- /dev/null
+++ b/common/jpeg/README_TightVNC.txt
@@ -0,0 +1,5 @@
+This directory includes a copy of the Independent JPEG Group's JPEG
+library (see the README file for more information). Not all the files
+from the original distribution have been included into the TightVNC
+codebase. To obtain the original library, please see the README file,
+section "ARCHIVE LOCATIONS".
diff --git a/common/jpeg/config.guess b/common/jpeg/config.guess
new file mode 100755
index 00000000..413ed41c
--- /dev/null
+++ b/common/jpeg/config.guess
@@ -0,0 +1,883 @@
+#! /bin/sh
+# Attempt to guess a canonical system name.
+#   Copyright (C) 1992, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
+#
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Written by Per Bothner <bothner@cygnus.com>.
+# The master version of this file is at the FSF in /home/gd/gnu/lib.
+#
+# This script attempts to guess a canonical system name similar to
+# config.sub.  If it succeeds, it prints the system name on stdout, and
+# exits with 0.  Otherwise, it exits with 1.
+#
+# The plan is that this can be called by configure scripts if you
+# don't specify an explicit system type (host/target name).
+#
+# Only a few systems have been added to this list; please add others
+# (but try to keep the structure clean).
+#
+
+# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
+# (ghazi@noc.rutgers.edu 8/24/94.)
+if (test -f /.attbin/uname) >/dev/null 2>&1 ; then
+	PATH=$PATH:/.attbin ; export PATH
+fi
+
+UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
+UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
+UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown
+UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
+
+trap 'rm -f dummy.c dummy.o dummy; exit 1' 1 2 15
+
+# Note: order is significant - the case branches are not exclusive.
+
+case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
+    alpha:OSF1:*:*)
+	if test $UNAME_RELEASE = "V4.0"; then
+		UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
+	fi
+	# A Vn.n version is a released version.
+	# A Tn.n version is a released field test version.
+	# A Xn.n version is an unreleased experimental baselevel.
+	# 1.2 uses "1.2" for uname -r.
+	cat <<EOF >dummy.s
+	.globl main
+	.ent main
+main:
+	.frame \$30,0,\$26,0
+	.prologue 0
+	.long 0x47e03d80 # implver $0
+	lda \$2,259
+	.long 0x47e20c21 # amask $2,$1
+	srl \$1,8,\$2
+	sll \$2,2,\$2
+	sll \$0,3,\$0
+	addl \$1,\$0,\$0
+	addl \$2,\$0,\$0
+	ret \$31,(\$26),1
+	.end main
+EOF
+	${CC-cc} dummy.s -o dummy 2>/dev/null
+	if test "$?" = 0 ; then
+		./dummy
+		case "$?" in
+			7)
+				UNAME_MACHINE="alpha"
+				;;
+			15)
+				UNAME_MACHINE="alphaev5"
+				;;
+			14)
+				UNAME_MACHINE="alphaev56"
+				;;
+			10)
+				UNAME_MACHINE="alphapca56"
+				;;
+			16)
+				UNAME_MACHINE="alphaev6"
+				;;
+		esac
+	fi
+	rm -f dummy.s dummy
+	echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[VTX]//' | tr [[A-Z]] [[a-z]]`
+	exit 0 ;;
+    21064:Windows_NT:50:3)
+	echo alpha-dec-winnt3.5
+	exit 0 ;;
+    Amiga*:UNIX_System_V:4.0:*)
+	echo m68k-cbm-sysv4
+	exit 0;;
+    amiga:NetBSD:*:*)
+      echo m68k-cbm-netbsd${UNAME_RELEASE}
+      exit 0 ;;
+    amiga:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    arc64:OpenBSD:*:*)
+	echo mips64el-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    arc:OpenBSD:*:*)
+	echo mipsel-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    hkmips:OpenBSD:*:*)
+	echo mips-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    pmax:OpenBSD:*:*)
+	echo mipsel-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    sgi:OpenBSD:*:*)
+	echo mips-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    wgrisc:OpenBSD:*:*)
+	echo mipsel-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
+	echo arm-acorn-riscix${UNAME_RELEASE}
+	exit 0;;
+    arm32:NetBSD:*:*)
+	echo arm-unknown-netbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
+	exit 0 ;;
+    SR2?01:HI-UX/MPP:*:*)
+	echo hppa1.1-hitachi-hiuxmpp
+	exit 0;;
+    Pyramid*:OSx*:*:*|MIS*:OSx*:*:*)
+	# akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
+	if test "`(/bin/universe) 2>/dev/null`" = att ; then
+		echo pyramid-pyramid-sysv3
+	else
+		echo pyramid-pyramid-bsd
+	fi
+	exit 0 ;;
+    NILE:*:*:dcosx)
+	echo pyramid-pyramid-svr4
+	exit 0 ;;
+    sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
+	echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    i86pc:SunOS:5.*:*)
+	echo i386-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    sun4*:SunOS:6*:*)
+	# According to config.sub, this is the proper way to canonicalize
+	# SunOS6.  Hard to guess exactly what SunOS6 will be like, but
+	# it's likely to be more like Solaris than SunOS4.
+	echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    sun4*:SunOS:*:*)
+	case "`/usr/bin/arch -k`" in
+	    Series*|S4*)
+		UNAME_RELEASE=`uname -v`
+		;;
+	esac
+	# Japanese Language versions have a version number like `4.1.3-JL'.
+	echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'`
+	exit 0 ;;
+    sun3*:SunOS:*:*)
+	echo m68k-sun-sunos${UNAME_RELEASE}
+	exit 0 ;;
+    sun*:*:4.2BSD:*)
+	UNAME_RELEASE=`(head -1 /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
+	test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3
+	case "`/bin/arch`" in
+	    sun3)
+		echo m68k-sun-sunos${UNAME_RELEASE}
+		;;
+	    sun4)
+		echo sparc-sun-sunos${UNAME_RELEASE}
+		;;
+	esac
+	exit 0 ;;
+    aushp:SunOS:*:*)
+	echo sparc-auspex-sunos${UNAME_RELEASE}
+	exit 0 ;;
+    atari*:NetBSD:*:*)
+	echo m68k-atari-netbsd${UNAME_RELEASE}
+	exit 0 ;;
+    atari*:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    sun3*:NetBSD:*:*)
+	echo m68k-sun-netbsd${UNAME_RELEASE}
+	exit 0 ;;
+    sun3*:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    mac68k:NetBSD:*:*)
+	echo m68k-apple-netbsd${UNAME_RELEASE}
+	exit 0 ;;
+    mac68k:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    mvme68k:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    mvme88k:OpenBSD:*:*)
+	echo m88k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    powerpc:machten:*:*)
+	echo powerpc-apple-machten${UNAME_RELEASE}
+	exit 0 ;;
+    RISC*:Mach:*:*)
+	echo mips-dec-mach_bsd4.3
+	exit 0 ;;
+    RISC*:ULTRIX:*:*)
+	echo mips-dec-ultrix${UNAME_RELEASE}
+	exit 0 ;;
+    VAX*:ULTRIX*:*:*)
+	echo vax-dec-ultrix${UNAME_RELEASE}
+	exit 0 ;;
+    2020:CLIX:*:*)
+	echo clipper-intergraph-clix${UNAME_RELEASE}
+	exit 0 ;;
+    mips:*:*:UMIPS | mips:*:*:RISCos)
+	sed 's/^	//' << EOF >dummy.c
+	int main (argc, argv) int argc; char **argv; {
+	#if defined (host_mips) && defined (MIPSEB)
+	#if defined (SYSTYPE_SYSV)
+	  printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_SVR4)
+	  printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0);
+	#endif
+	#if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
+	  printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0);
+	#endif
+	#endif
+	  exit (-1);
+	}
+EOF
+	${CC-cc} dummy.c -o dummy \
+	  && ./dummy `echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` \
+	  && rm dummy.c dummy && exit 0
+	rm -f dummy.c dummy
+	echo mips-mips-riscos${UNAME_RELEASE}
+	exit 0 ;;
+    Night_Hawk:Power_UNIX:*:*)
+	echo powerpc-harris-powerunix
+	exit 0 ;;
+    m88k:CX/UX:7*:*)
+	echo m88k-harris-cxux7
+	exit 0 ;;
+    m88k:*:4*:R4*)
+	echo m88k-motorola-sysv4
+	exit 0 ;;
+    m88k:*:3*:R3*)
+	echo m88k-motorola-sysv3
+	exit 0 ;;
+    AViiON:dgux:*:*)
+        # DG/UX returns AViiON for all architectures
+        UNAME_PROCESSOR=`/usr/bin/uname -p`
+        if [ $UNAME_PROCESSOR = mc88100 -o $UNAME_PROCESSOR = mc88110 ] ; then
+	if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx \
+	     -o ${TARGET_BINARY_INTERFACE}x = x ] ; then
+		echo m88k-dg-dgux${UNAME_RELEASE}
+	else
+		echo m88k-dg-dguxbcs${UNAME_RELEASE}
+	fi
+        else echo i586-dg-dgux${UNAME_RELEASE}
+        fi
+ 	exit 0 ;;
+    M88*:DolphinOS:*:*)	# DolphinOS (SVR3)
+	echo m88k-dolphin-sysv3
+	exit 0 ;;
+    M88*:*:R3*:*)
+	# Delta 88k system running SVR3
+	echo m88k-motorola-sysv3
+	exit 0 ;;
+    XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
+	echo m88k-tektronix-sysv3
+	exit 0 ;;
+    Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
+	echo m68k-tektronix-bsd
+	exit 0 ;;
+    *:IRIX*:*:*)
+	echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'`
+	exit 0 ;;
+    ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
+	echo romp-ibm-aix      # uname -m gives an 8 hex-code CPU id
+	exit 0 ;;              # Note that: echo "'`uname -s`'" gives 'AIX '
+    i?86:AIX:*:*)
+	echo i386-ibm-aix
+	exit 0 ;;
+    *:AIX:2:3)
+	if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
+		sed 's/^		//' << EOF >dummy.c
+		#include <sys/systemcfg.h>
+
+		main()
+			{
+			if (!__power_pc())
+				exit(1);
+			puts("powerpc-ibm-aix3.2.5");
+			exit(0);
+			}
+EOF
+		${CC-cc} dummy.c -o dummy && ./dummy && rm dummy.c dummy && exit 0
+		rm -f dummy.c dummy
+		echo rs6000-ibm-aix3.2.5
+	elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
+		echo rs6000-ibm-aix3.2.4
+	else
+		echo rs6000-ibm-aix3.2
+	fi
+	exit 0 ;;
+    *:AIX:*:4)
+	if /usr/sbin/lsattr -EHl proc0 | grep POWER >/dev/null 2>&1; then
+		IBM_ARCH=rs6000
+	else
+		IBM_ARCH=powerpc
+	fi
+	if [ -x /usr/bin/oslevel ] ; then
+		IBM_REV=`/usr/bin/oslevel`
+	else
+		IBM_REV=4.${UNAME_RELEASE}
+	fi
+	echo ${IBM_ARCH}-ibm-aix${IBM_REV}
+	exit 0 ;;
+    *:AIX:*:*)
+	echo rs6000-ibm-aix
+	exit 0 ;;
+    ibmrt:4.4BSD:*|romp-ibm:BSD:*)
+	echo romp-ibm-bsd4.4
+	exit 0 ;;
+    ibmrt:*BSD:*|romp-ibm:BSD:*)            # covers RT/PC NetBSD and
+	echo romp-ibm-bsd${UNAME_RELEASE}   # 4.3 with uname added to
+	exit 0 ;;                           # report: romp-ibm BSD 4.3
+    *:BOSX:*:*)
+	echo rs6000-bull-bosx
+	exit 0 ;;
+    DPX/2?00:B.O.S.:*:*)
+	echo m68k-bull-sysv3
+	exit 0 ;;
+    9000/[34]??:4.3bsd:1.*:*)
+	echo m68k-hp-bsd
+	exit 0 ;;
+    hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
+	echo m68k-hp-bsd4.4
+	exit 0 ;;
+    9000/[3478]??:HP-UX:*:*)
+	case "${UNAME_MACHINE}" in
+	    9000/31? )            HP_ARCH=m68000 ;;
+	    9000/[34]?? )         HP_ARCH=m68k ;;
+	    9000/7?? | 9000/8?[1679] ) HP_ARCH=hppa1.1 ;;
+	    9000/8?? )            HP_ARCH=hppa1.0 ;;
+	esac
+	HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
+	echo ${HP_ARCH}-hp-hpux${HPUX_REV}
+	exit 0 ;;
+    3050*:HI-UX:*:*)
+	sed 's/^	//' << EOF >dummy.c
+	#include <unistd.h>
+	int
+	main ()
+	{
+	  long cpu = sysconf (_SC_CPU_VERSION);
+	  /* The order matters, because CPU_IS_HP_MC68K erroneously returns
+	     true for CPU_PA_RISC1_0.  CPU_IS_PA_RISC returns correct
+	     results, however.  */
+	  if (CPU_IS_PA_RISC (cpu))
+	    {
+	      switch (cpu)
+		{
+		  case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break;
+		  case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break;
+		  default: puts ("hppa-hitachi-hiuxwe2"); break;
+		}
+	    }
+	  else if (CPU_IS_HP_MC68K (cpu))
+	    puts ("m68k-hitachi-hiuxwe2");
+	  else puts ("unknown-hitachi-hiuxwe2");
+	  exit (0);
+	}
+EOF
+	${CC-cc} dummy.c -o dummy && ./dummy && rm dummy.c dummy && exit 0
+	rm -f dummy.c dummy
+	echo unknown-hitachi-hiuxwe2
+	exit 0 ;;
+    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* )
+	echo hppa1.1-hp-bsd
+	exit 0 ;;
+    9000/8??:4.3bsd:*:*)
+	echo hppa1.0-hp-bsd
+	exit 0 ;;
+    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* )
+	echo hppa1.1-hp-osf
+	exit 0 ;;
+    hp8??:OSF1:*:*)
+	echo hppa1.0-hp-osf
+	exit 0 ;;
+    i?86:OSF1:*:*)
+	if [ -x /usr/sbin/sysversion ] ; then
+	    echo ${UNAME_MACHINE}-unknown-osf1mk
+	else
+	    echo ${UNAME_MACHINE}-unknown-osf1
+	fi
+	exit 0 ;;
+    parisc*:Lites*:*:*)
+	echo hppa1.1-hp-lites
+	exit 0 ;;
+    C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
+	echo c1-convex-bsd
+        exit 0 ;;
+    C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
+	if getsysinfo -f scalar_acc
+	then echo c32-convex-bsd
+	else echo c2-convex-bsd
+	fi
+        exit 0 ;;
+    C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
+	echo c34-convex-bsd
+        exit 0 ;;
+    C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
+	echo c38-convex-bsd
+        exit 0 ;;
+    C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
+	echo c4-convex-bsd
+        exit 0 ;;
+    CRAY*X-MP:*:*:*)
+	echo xmp-cray-unicos
+        exit 0 ;;
+    CRAY*Y-MP:*:*:*)
+	echo ymp-cray-unicos${UNAME_RELEASE}
+	exit 0 ;;
+    CRAY*[A-Z]90:*:*:*)
+	echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \
+	| sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
+	      -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/
+	exit 0 ;;
+    CRAY*TS:*:*:*)
+	echo t90-cray-unicos${UNAME_RELEASE}
+	exit 0 ;;
+    CRAY-2:*:*:*)
+	echo cray2-cray-unicos
+        exit 0 ;;
+    F300:UNIX_System_V:*:*)
+        FUJITSU_SYS=`uname -p | tr [A-Z] [a-z] | sed -e 's/\///'`
+        FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'`
+        echo "f300-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
+        exit 0 ;;
+    F301:UNIX_System_V:*:*)
+       echo f301-fujitsu-uxpv`echo $UNAME_RELEASE | sed 's/ .*//'`
+       exit 0 ;;
+    hp3[0-9][05]:NetBSD:*:*)
+	echo m68k-hp-netbsd${UNAME_RELEASE}
+	exit 0 ;;
+    hp300:OpenBSD:*:*)
+	echo m68k-unknown-openbsd${UNAME_RELEASE}
+	exit 0 ;;
+    i?86:BSD/386:*:* | *:BSD/OS:*:*)
+	echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE}
+	exit 0 ;;
+    *:FreeBSD:*:*)
+	echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`
+	exit 0 ;;
+    *:NetBSD:*:*)
+	echo ${UNAME_MACHINE}-unknown-netbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
+	exit 0 ;;
+    *:OpenBSD:*:*)
+	echo ${UNAME_MACHINE}-unknown-openbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
+	exit 0 ;;
+    i*:CYGWIN*:*)
+	echo i386-pc-cygwin32
+	exit 0 ;;
+    i*:MINGW*:*)
+	echo i386-pc-mingw32
+	exit 0 ;;
+    p*:CYGWIN*:*)
+	echo powerpcle-unknown-cygwin32
+	exit 0 ;;
+    prep*:SunOS:5.*:*)
+	echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
+	exit 0 ;;
+    *:GNU:*:*)
+	echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'`
+	exit 0 ;;
+    *:Linux:*:*)
+	# The BFD linker knows what the default object file format is, so
+	# first see if it will tell us.
+	ld_help_string=`ld --help 2>&1`
+	ld_supported_emulations=`echo $ld_help_string \
+			 | sed -ne '/supported emulations:/!d
+				    s/[ 	][ 	]*/ /g
+				    s/.*supported emulations: *//
+				    s/ .*//
+				    p'`
+        case "$ld_supported_emulations" in
+	  i?86linux)  echo "${UNAME_MACHINE}-pc-linux-gnuaout"      ; exit 0 ;;
+	  i?86coff)   echo "${UNAME_MACHINE}-pc-linux-gnucoff"      ; exit 0 ;;
+	  sparclinux) echo "${UNAME_MACHINE}-unknown-linux-gnuaout" ; exit 0 ;;
+	  m68klinux)  echo "${UNAME_MACHINE}-unknown-linux-gnuaout" ; exit 0 ;;
+	  elf32ppc)   echo "powerpc-unknown-linux-gnu"              ; exit 0 ;;
+	esac
+
+	if test "${UNAME_MACHINE}" = "alpha" ; then
+		sed 's/^	//'  <<EOF >dummy.s
+		.globl main
+		.ent main
+	main:
+		.frame \$30,0,\$26,0
+		.prologue 0
+		.long 0x47e03d80 # implver $0
+		lda \$2,259
+		.long 0x47e20c21 # amask $2,$1
+		srl \$1,8,\$2
+		sll \$2,2,\$2
+		sll \$0,3,\$0
+		addl \$1,\$0,\$0
+		addl \$2,\$0,\$0
+		ret \$31,(\$26),1
+		.end main
+EOF
+		LIBC=""
+		${CC-cc} dummy.s -o dummy 2>/dev/null
+		if test "$?" = 0 ; then
+			./dummy
+			case "$?" in
+			7)
+				UNAME_MACHINE="alpha"
+				;;
+			15)
+				UNAME_MACHINE="alphaev5"
+				;;
+			14)
+				UNAME_MACHINE="alphaev56"
+				;;
+			10)
+				UNAME_MACHINE="alphapca56"
+				;;
+			16)
+				UNAME_MACHINE="alphaev6"
+				;;
+			esac	
+
+			objdump --private-headers dummy | \
+			  grep ld.so.1 > /dev/null
+			if test "$?" = 0 ; then
+				LIBC="libc1"
+			fi
+		fi	
+		rm -f dummy.s dummy
+		echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC} ; exit 0
+	elif test "${UNAME_MACHINE}" = "mips" ; then
+	  cat >dummy.c <<EOF
+main(argc, argv)
+     int argc;
+     char *argv[];
+{
+#ifdef __MIPSEB__
+  printf ("%s-unknown-linux-gnu\n", argv[1]);
+#endif
+#ifdef __MIPSEL__
+  printf ("%sel-unknown-linux-gnu\n", argv[1]);
+#endif
+  return 0;
+}
+EOF
+	  ${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy "${UNAME_MACHINE}" && rm dummy.c dummy && exit 0
+	  rm -f dummy.c dummy
+	else
+	  # Either a pre-BFD a.out linker (linux-gnuoldld)
+	  # or one that does not give us useful --help.
+	  # GCC wants to distinguish between linux-gnuoldld and linux-gnuaout.
+	  # If ld does not provide *any* "supported emulations:"
+	  # that means it is gnuoldld.
+	  echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations:"
+	  test $? != 0 && echo "${UNAME_MACHINE}-pc-linux-gnuoldld" && exit 0
+
+	  case "${UNAME_MACHINE}" in
+	  i?86)
+	    VENDOR=pc;
+	    ;;
+	  *)
+	    VENDOR=unknown;
+	    ;;
+	  esac
+	  # Determine whether the default compiler is a.out or elf
+	  cat >dummy.c <<EOF
+#include <features.h>
+main(argc, argv)
+     int argc;
+     char *argv[];
+{
+#ifdef __ELF__
+# ifdef __GLIBC__
+#  if __GLIBC__ >= 2
+    printf ("%s-${VENDOR}-linux-gnu\n", argv[1]);
+#  else
+    printf ("%s-${VENDOR}-linux-gnulibc1\n", argv[1]);
+#  endif
+# else
+   printf ("%s-${VENDOR}-linux-gnulibc1\n", argv[1]);
+# endif
+#else
+  printf ("%s-${VENDOR}-linux-gnuaout\n", argv[1]);
+#endif
+  return 0;
+}
+EOF
+	  ${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy "${UNAME_MACHINE}" && rm dummy.c dummy && exit 0
+	  rm -f dummy.c dummy
+	fi ;;
+# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.  earlier versions
+# are messed up and put the nodename in both sysname and nodename.
+    i?86:DYNIX/ptx:4*:*)
+	echo i386-sequent-sysv4
+	exit 0 ;;
+    i?86:UNIX_SV:4.2MP:2.*)
+        # Unixware is an offshoot of SVR4, but it has its own version
+        # number series starting with 2...
+        # I am not positive that other SVR4 systems won't match this,
+	# I just have to hope.  -- rms.
+        # Use sysv4.2uw... so that sysv4* matches it.
+	echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION}
+	exit 0 ;;
+    i?86:*:4.*:* | i?86:SYSTEM_V:4.*:*)
+	if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
+		echo ${UNAME_MACHINE}-univel-sysv${UNAME_RELEASE}
+	else
+		echo ${UNAME_MACHINE}-pc-sysv${UNAME_RELEASE}
+	fi
+	exit 0 ;;
+    i?86:*:3.2:*)
+	if test -f /usr/options/cb.name; then
+		UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
+		echo ${UNAME_MACHINE}-pc-isc$UNAME_REL
+	elif /bin/uname -X 2>/dev/null >/dev/null ; then
+		UNAME_REL=`(/bin/uname -X|egrep Release|sed -e 's/.*= //')`
+		(/bin/uname -X|egrep i80486 >/dev/null) && UNAME_MACHINE=i486
+		(/bin/uname -X|egrep '^Machine.*Pentium' >/dev/null) \
+			&& UNAME_MACHINE=i586
+		echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
+	else
+		echo ${UNAME_MACHINE}-pc-sysv32
+	fi
+	exit 0 ;;
+    pc:*:*:*)
+        # uname -m prints for DJGPP always 'pc', but it prints nothing about
+        # the processor, so we play safe by assuming i386.
+	echo i386-pc-msdosdjgpp
+        exit 0 ;;
+    Intel:Mach:3*:*)
+	echo i386-pc-mach3
+	exit 0 ;;
+    paragon:*:*:*)
+	echo i860-intel-osf1
+	exit 0 ;;
+    i860:*:4.*:*) # i860-SVR4
+	if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
+	  echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4
+	else # Add other i860-SVR4 vendors below as they are discovered.
+	  echo i860-unknown-sysv${UNAME_RELEASE}  # Unknown i860-SVR4
+	fi
+	exit 0 ;;
+    mini*:CTIX:SYS*5:*)
+	# "miniframe"
+	echo m68010-convergent-sysv
+	exit 0 ;;
+    M68*:*:R3V[567]*:*)
+	test -r /sysV68 && echo 'm68k-motorola-sysv' && exit 0 ;;
+    3[34]??:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 4850:*:4.0:3.0)
+	OS_REL=''
+	test -r /etc/.relid \
+	&& OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+	/bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+	  && echo i486-ncr-sysv4.3${OS_REL} && exit 0
+	/bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
+	  && echo i586-ncr-sysv4.3${OS_REL} && exit 0 ;;
+    3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
+        /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
+          && echo i486-ncr-sysv4 && exit 0 ;;
+    m68*:LynxOS:2.*:*)
+	echo m68k-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    mc68030:UNIX_System_V:4.*:*)
+	echo m68k-atari-sysv4
+	exit 0 ;;
+    i?86:LynxOS:2.*:*)
+	echo i386-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    TSUNAMI:LynxOS:2.*:*)
+	echo sparc-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    rs6000:LynxOS:2.*:* | PowerPC:LynxOS:2.*:*)
+	echo rs6000-unknown-lynxos${UNAME_RELEASE}
+	exit 0 ;;
+    SM[BE]S:UNIX_SV:*:*)
+	echo mips-dde-sysv${UNAME_RELEASE}
+	exit 0 ;;
+    RM*:SINIX-*:*:*)
+	echo mips-sni-sysv4
+	exit 0 ;;
+    *:SINIX-*:*:*)
+	if uname -p 2>/dev/null >/dev/null ; then
+		UNAME_MACHINE=`(uname -p) 2>/dev/null`
+		echo ${UNAME_MACHINE}-sni-sysv4
+	else
+		echo ns32k-sni-sysv
+	fi
+	exit 0 ;;
+    PENTIUM:CPunix:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort
+                           # says <Richard.M.Bartel@ccMail.Census.GOV>
+        echo i586-unisys-sysv4
+        exit 0 ;;
+    *:UNIX_System_V:4*:FTX*)
+	# From Gerald Hewes <hewes@openmarket.com>.
+	# How about differentiating between stratus architectures? -djm
+	echo hppa1.1-stratus-sysv4
+	exit 0 ;;
+    *:*:*:FTX*)
+	# From seanf@swdc.stratus.com.
+	echo i860-stratus-sysv4
+	exit 0 ;;
+    mc68*:A/UX:*:*)
+	echo m68k-apple-aux${UNAME_RELEASE}
+	exit 0 ;;
+    news*:NEWS-OS:*:6*)
+	echo mips-sony-newsos6
+	exit 0 ;;
+    R3000:*System_V*:*:* | R4000:UNIX_SYSV:*:*)
+	if [ -d /usr/nec ]; then
+	        echo mips-nec-sysv${UNAME_RELEASE}
+	else
+	        echo mips-unknown-sysv${UNAME_RELEASE}
+	fi
+        exit 0 ;;
+esac
+
+#echo '(No uname command or uname output not recognized.)' 1>&2
+#echo "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" 1>&2
+
+cat >dummy.c <<EOF
+#ifdef _SEQUENT_
+# include <sys/types.h>
+# include <sys/utsname.h>
+#endif
+main ()
+{
+#if defined (sony)
+#if defined (MIPSEB)
+  /* BFD wants "bsd" instead of "newsos".  Perhaps BFD should be changed,
+     I don't know....  */
+  printf ("mips-sony-bsd\n"); exit (0);
+#else
+#include <sys/param.h>
+  printf ("m68k-sony-newsos%s\n",
+#ifdef NEWSOS4
+          "4"
+#else
+	  ""
+#endif
+         ); exit (0);
+#endif
+#endif
+
+#if defined (__arm) && defined (__acorn) && defined (__unix)
+  printf ("arm-acorn-riscix"); exit (0);
+#endif
+
+#if defined (hp300) && !defined (hpux)
+  printf ("m68k-hp-bsd\n"); exit (0);
+#endif
+
+#if defined (NeXT)
+#if !defined (__ARCHITECTURE__)
+#define __ARCHITECTURE__ "m68k"
+#endif
+  int version;
+  version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
+  printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
+  exit (0);
+#endif
+
+#if defined (MULTIMAX) || defined (n16)
+#if defined (UMAXV)
+  printf ("ns32k-encore-sysv\n"); exit (0);
+#else
+#if defined (CMU)
+  printf ("ns32k-encore-mach\n"); exit (0);
+#else
+  printf ("ns32k-encore-bsd\n"); exit (0);
+#endif
+#endif
+#endif
+
+#if defined (__386BSD__)
+  printf ("i386-pc-bsd\n"); exit (0);
+#endif
+
+#if defined (sequent)
+#if defined (i386)
+  printf ("i386-sequent-dynix\n"); exit (0);
+#endif
+#if defined (ns32000)
+  printf ("ns32k-sequent-dynix\n"); exit (0);
+#endif
+#endif
+
+#if defined (_SEQUENT_)
+    struct utsname un;
+
+    uname(&un);
+
+    if (strncmp(un.version, "V2", 2) == 0) {
+	printf ("i386-sequent-ptx2\n"); exit (0);
+    }
+    if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */
+	printf ("i386-sequent-ptx1\n"); exit (0);
+    }
+    printf ("i386-sequent-ptx\n"); exit (0);
+
+#endif
+
+#if defined (vax)
+#if !defined (ultrix)
+  printf ("vax-dec-bsd\n"); exit (0);
+#else
+  printf ("vax-dec-ultrix\n"); exit (0);
+#endif
+#endif
+
+#if defined (alliant) && defined (i860)
+  printf ("i860-alliant-bsd\n"); exit (0);
+#endif
+
+  exit (1);
+}
+EOF
+
+${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy && rm dummy.c dummy && exit 0
+rm -f dummy.c dummy
+
+# Apollos put the system type in the environment.
+
+test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit 0; }
+
+# Convex versions that predate uname can use getsysinfo(1)
+
+if [ -x /usr/convex/getsysinfo ]
+then
+    case `getsysinfo -f cpu_type` in
+    c1*)
+	echo c1-convex-bsd
+	exit 0 ;;
+    c2*)
+	if getsysinfo -f scalar_acc
+	then echo c32-convex-bsd
+	else echo c2-convex-bsd
+	fi
+	exit 0 ;;
+    c34*)
+	echo c34-convex-bsd
+	exit 0 ;;
+    c38*)
+	echo c38-convex-bsd
+	exit 0 ;;
+    c4*)
+	echo c4-convex-bsd
+	exit 0 ;;
+    esac
+fi
+
+#echo '(Unable to guess system type)' 1>&2
+
+exit 1
diff --git a/common/jpeg/config.sub b/common/jpeg/config.sub
new file mode 100755
index 00000000..213a6d47
--- /dev/null
+++ b/common/jpeg/config.sub
@@ -0,0 +1,954 @@
+#! /bin/sh
+# Configuration validation subroutine script, version 1.1.
+#   Copyright (C) 1991, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
+# This file is (in principle) common to ALL GNU software.
+# The presence of a machine in this file suggests that SOME GNU software
+# can handle that machine.  It does not imply ALL GNU software can.
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Configuration subroutine to validate and canonicalize a configuration type.
+# Supply the specified configuration type as an argument.
+# If it is invalid, we print an error message on stderr and exit with code 1.
+# Otherwise, we print the canonical config type on stdout and succeed.
+
+# This file is supposed to be the same for all GNU packages
+# and recognize all the CPU types, system types and aliases
+# that are meaningful with *any* GNU software.
+# Each package is responsible for reporting which valid configurations
+# it does not support.  The user should be able to distinguish
+# a failure to support a valid configuration from a meaningless
+# configuration.
+
+# The goal of this file is to map all the various variations of a given
+# machine specification into a single specification in the form:
+#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
+# or in some cases, the newer four-part form:
+#	CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
+# It is wrong to echo any other type of specification.
+
+if [ x$1 = x ]
+then
+	echo Configuration name missing. 1>&2
+	echo "Usage: $0 CPU-MFR-OPSYS" 1>&2
+	echo "or     $0 ALIAS" 1>&2
+	echo where ALIAS is a recognized configuration type. 1>&2
+	exit 1
+fi
+
+# First pass through any local machine types.
+case $1 in
+	*local*)
+		echo $1
+		exit 0
+		;;
+	*)
+	;;
+esac
+
+# Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any).
+# Here we must recognize all the valid KERNEL-OS combinations.
+maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
+case $maybe_os in
+  linux-gnu*)
+    os=-$maybe_os
+    basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
+    ;;
+  *)
+    basic_machine=`echo $1 | sed 's/-[^-]*$//'`
+    if [ $basic_machine != $1 ]
+    then os=`echo $1 | sed 's/.*-/-/'`
+    else os=; fi
+    ;;
+esac
+
+### Let's recognize common machines as not being operating systems so
+### that things like config.sub decstation-3100 work.  We also
+### recognize some manufacturers as not being operating systems, so we
+### can provide default operating systems below.
+case $os in
+	-sun*os*)
+		# Prevent following clause from handling this invalid input.
+		;;
+	-dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \
+	-att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \
+	-unicom* | -ibm* | -next | -hp | -isi* | -apollo | -altos* | \
+	-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
+	-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
+	-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \
+	-apple)
+		os=
+		basic_machine=$1
+		;;
+	-hiux*)
+		os=-hiuxwe2
+		;;
+	-sco5)
+		os=sco3.2v5
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco4)
+		os=-sco3.2v4
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco3.2.[4-9]*)
+		os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco3.2v[4-9]*)
+		# Don't forget version if it is 3.2v4 or newer.
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-sco*)
+		os=-sco3.2v2
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-isc)
+		os=-isc2.2
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-clix*)
+		basic_machine=clipper-intergraph
+		;;
+	-isc*)
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
+		;;
+	-lynx*)
+		os=-lynxos
+		;;
+	-ptx*)
+		basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'`
+		;;
+	-windowsnt*)
+		os=`echo $os | sed -e 's/windowsnt/winnt/'`
+		;;
+	-psos*)
+		os=-psos
+		;;
+esac
+
+# Decode aliases for certain CPU-COMPANY combinations.
+case $basic_machine in
+	# Recognize the basic CPU types without company name.
+	# Some are omitted here because they have special meanings below.
+	tahoe | i860 | m32r | m68k | m68000 | m88k | ns32k | arc | arm \
+		| arme[lb] | pyramid | mn10200 | mn10300 \
+		| tron | a29k | 580 | i960 | h8300 | hppa | hppa1.0 | hppa1.1 \
+		| alpha | alphaev5 | alphaev56 | we32k | ns16k | clipper \
+		| i370 | sh | powerpc | powerpcle | 1750a | dsp16xx | pdp11 \
+		| mips64 | mipsel | mips64el | mips64orion | mips64orionel \
+		| mipstx39 | mipstx39el \
+		| sparc | sparclet | sparclite | sparc64 | v850)
+		basic_machine=$basic_machine-unknown
+		;;
+	# We use `pc' rather than `unknown'
+	# because (1) that's what they normally are, and
+	# (2) the word "unknown" tends to confuse beginning users.
+	i[3456]86)
+	  basic_machine=$basic_machine-pc
+	  ;;
+	# Object if more than one company name word.
+	*-*-*)
+		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
+		exit 1
+		;;
+	# Recognize the basic CPU types with company name.
+	vax-* | tahoe-* | i[3456]86-* | i860-* | m32r-* | m68k-* | m68000-* \
+	      | m88k-* | sparc-* | ns32k-* | fx80-* | arc-* | arm-* | c[123]* \
+	      | mips-* | pyramid-* | tron-* | a29k-* | romp-* | rs6000-* \
+	      | power-* | none-* | 580-* | cray2-* | h8300-* | i960-* \
+	      | xmp-* | ymp-* | hppa-* | hppa1.0-* | hppa1.1-* \
+	      | alpha-* | alphaev5-* | alphaev56-* | we32k-* | cydra-* \
+	      | ns16k-* | pn-* | np1-* | xps100-* | clipper-* | orion-* \
+	      | sparclite-* | pdp11-* | sh-* | powerpc-* | powerpcle-* \
+	      | sparc64-* | mips64-* | mipsel-* \
+	      | mips64el-* | mips64orion-* | mips64orionel-*  \
+	      | mipstx39-* | mipstx39el-* \
+	      | f301-*)
+		;;
+	# Recognize the various machine names and aliases which stand
+	# for a CPU type and a company and sometimes even an OS.
+	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
+		basic_machine=m68000-att
+		;;
+	3b*)
+		basic_machine=we32k-att
+		;;
+	alliant | fx80)
+		basic_machine=fx80-alliant
+		;;
+	altos | altos3068)
+		basic_machine=m68k-altos
+		;;
+	am29k)
+		basic_machine=a29k-none
+		os=-bsd
+		;;
+	amdahl)
+		basic_machine=580-amdahl
+		os=-sysv
+		;;
+	amiga | amiga-*)
+		basic_machine=m68k-cbm
+		;;
+	amigaos | amigados)
+		basic_machine=m68k-cbm
+		os=-amigaos
+		;;
+	amigaunix | amix)
+		basic_machine=m68k-cbm
+		os=-sysv4
+		;;
+	apollo68)
+		basic_machine=m68k-apollo
+		os=-sysv
+		;;
+	aux)
+		basic_machine=m68k-apple
+		os=-aux
+		;;
+	balance)
+		basic_machine=ns32k-sequent
+		os=-dynix
+		;;
+	convex-c1)
+		basic_machine=c1-convex
+		os=-bsd
+		;;
+	convex-c2)
+		basic_machine=c2-convex
+		os=-bsd
+		;;
+	convex-c32)
+		basic_machine=c32-convex
+		os=-bsd
+		;;
+	convex-c34)
+		basic_machine=c34-convex
+		os=-bsd
+		;;
+	convex-c38)
+		basic_machine=c38-convex
+		os=-bsd
+		;;
+	cray | ymp)
+		basic_machine=ymp-cray
+		os=-unicos
+		;;
+	cray2)
+		basic_machine=cray2-cray
+		os=-unicos
+		;;
+	[ctj]90-cray)
+		basic_machine=c90-cray
+		os=-unicos
+		;;
+	crds | unos)
+		basic_machine=m68k-crds
+		;;
+	da30 | da30-*)
+		basic_machine=m68k-da30
+		;;
+	decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn)
+		basic_machine=mips-dec
+		;;
+	delta | 3300 | motorola-3300 | motorola-delta \
+	      | 3300-motorola | delta-motorola)
+		basic_machine=m68k-motorola
+		;;
+	delta88)
+		basic_machine=m88k-motorola
+		os=-sysv3
+		;;
+	dpx20 | dpx20-*)
+		basic_machine=rs6000-bull
+		os=-bosx
+		;;
+	dpx2* | dpx2*-bull)
+		basic_machine=m68k-bull
+		os=-sysv3
+		;;
+	ebmon29k)
+		basic_machine=a29k-amd
+		os=-ebmon
+		;;
+	elxsi)
+		basic_machine=elxsi-elxsi
+		os=-bsd
+		;;
+	encore | umax | mmax)
+		basic_machine=ns32k-encore
+		;;
+	fx2800)
+		basic_machine=i860-alliant
+		;;
+	genix)
+		basic_machine=ns32k-ns
+		;;
+	gmicro)
+		basic_machine=tron-gmicro
+		os=-sysv
+		;;
+	h3050r* | hiux*)
+		basic_machine=hppa1.1-hitachi
+		os=-hiuxwe2
+		;;
+	h8300hms)
+		basic_machine=h8300-hitachi
+		os=-hms
+		;;
+	harris)
+		basic_machine=m88k-harris
+		os=-sysv3
+		;;
+	hp300-*)
+		basic_machine=m68k-hp
+		;;
+	hp300bsd)
+		basic_machine=m68k-hp
+		os=-bsd
+		;;
+	hp300hpux)
+		basic_machine=m68k-hp
+		os=-hpux
+		;;
+	hp9k2[0-9][0-9] | hp9k31[0-9])
+		basic_machine=m68000-hp
+		;;
+	hp9k3[2-9][0-9])
+		basic_machine=m68k-hp
+		;;
+	hp9k7[0-9][0-9] | hp7[0-9][0-9] | hp9k8[0-9]7 | hp8[0-9]7)
+		basic_machine=hppa1.1-hp
+		;;
+	hp9k8[0-9][0-9] | hp8[0-9][0-9])
+		basic_machine=hppa1.0-hp
+		;;
+	hppa-next)
+		os=-nextstep3
+		;;
+	i370-ibm* | ibm*)
+		basic_machine=i370-ibm
+		os=-mvs
+		;;
+# I'm not sure what "Sysv32" means.  Should this be sysv3.2?
+	i[3456]86v32)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv32
+		;;
+	i[3456]86v4*)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv4
+		;;
+	i[3456]86v)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-sysv
+		;;
+	i[3456]86sol2)
+		basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
+		os=-solaris2
+		;;
+	iris | iris4d)
+		basic_machine=mips-sgi
+		case $os in
+		    -irix*)
+			;;
+		    *)
+			os=-irix4
+			;;
+		esac
+		;;
+	isi68 | isi)
+		basic_machine=m68k-isi
+		os=-sysv
+		;;
+	m88k-omron*)
+		basic_machine=m88k-omron
+		;;
+	magnum | m3230)
+		basic_machine=mips-mips
+		os=-sysv
+		;;
+	merlin)
+		basic_machine=ns32k-utek
+		os=-sysv
+		;;
+	miniframe)
+		basic_machine=m68000-convergent
+		;;
+	mipsel*-linux*)
+		basic_machine=mipsel-unknown
+		os=-linux-gnu
+		;;
+	mips*-linux*)
+		basic_machine=mips-unknown
+		os=-linux-gnu
+		;;
+	mips3*-*)
+		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`
+		;;
+	mips3*)
+		basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
+		;;
+	ncr3000)
+		basic_machine=i486-ncr
+		os=-sysv4
+		;;
+	news | news700 | news800 | news900)
+		basic_machine=m68k-sony
+		os=-newsos
+		;;
+	news1000)
+		basic_machine=m68030-sony
+		os=-newsos
+		;;
+	news-3600 | risc-news)
+		basic_machine=mips-sony
+		os=-newsos
+		;;
+	next | m*-next )
+		basic_machine=m68k-next
+		case $os in
+		    -nextstep* )
+			;;
+		    -ns2*)
+		      os=-nextstep2
+			;;
+		    *)
+		      os=-nextstep3
+			;;
+		esac
+		;;
+	nh3000)
+		basic_machine=m68k-harris
+		os=-cxux
+		;;
+	nh[45]000)
+		basic_machine=m88k-harris
+		os=-cxux
+		;;
+	nindy960)
+		basic_machine=i960-intel
+		os=-nindy
+		;;
+	np1)
+		basic_machine=np1-gould
+		;;
+	pa-hitachi)
+		basic_machine=hppa1.1-hitachi
+		os=-hiuxwe2
+		;;
+	paragon)
+		basic_machine=i860-intel
+		os=-osf
+		;;
+	pbd)
+		basic_machine=sparc-tti
+		;;
+	pbb)
+		basic_machine=m68k-tti
+		;;
+        pc532 | pc532-*)
+		basic_machine=ns32k-pc532
+		;;
+	pentium | p5)
+		basic_machine=i586-intel
+		;;
+	pentiumpro | p6)
+		basic_machine=i686-intel
+		;;
+	pentium-* | p5-*)
+		basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	pentiumpro-* | p6-*)
+		basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	k5)
+		# We don't have specific support for AMD's K5 yet, so just call it a Pentium
+		basic_machine=i586-amd
+		;;
+	nexen)
+		# We don't have specific support for Nexgen yet, so just call it a Pentium
+		basic_machine=i586-nexgen
+		;;
+	pn)
+		basic_machine=pn-gould
+		;;
+	power)	basic_machine=rs6000-ibm
+		;;
+	ppc)	basic_machine=powerpc-unknown
+	        ;;
+	ppc-*)	basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ppcle | powerpclittle | ppc-le | powerpc-little)
+		basic_machine=powerpcle-unknown
+	        ;;
+	ppcle-* | powerpclittle-*)
+		basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'`
+		;;
+	ps2)
+		basic_machine=i386-ibm
+		;;
+	rm[46]00)
+		basic_machine=mips-siemens
+		;;
+	rtpc | rtpc-*)
+		basic_machine=romp-ibm
+		;;
+	sequent)
+		basic_machine=i386-sequent
+		;;
+	sh)
+		basic_machine=sh-hitachi
+		os=-hms
+		;;
+	sps7)
+		basic_machine=m68k-bull
+		os=-sysv2
+		;;
+	spur)
+		basic_machine=spur-unknown
+		;;
+	sun2)
+		basic_machine=m68000-sun
+		;;
+	sun2os3)
+		basic_machine=m68000-sun
+		os=-sunos3
+		;;
+	sun2os4)
+		basic_machine=m68000-sun
+		os=-sunos4
+		;;
+	sun3os3)
+		basic_machine=m68k-sun
+		os=-sunos3
+		;;
+	sun3os4)
+		basic_machine=m68k-sun
+		os=-sunos4
+		;;
+	sun4os3)
+		basic_machine=sparc-sun
+		os=-sunos3
+		;;
+	sun4os4)
+		basic_machine=sparc-sun
+		os=-sunos4
+		;;
+	sun4sol2)
+		basic_machine=sparc-sun
+		os=-solaris2
+		;;
+	sun3 | sun3-*)
+		basic_machine=m68k-sun
+		;;
+	sun4)
+		basic_machine=sparc-sun
+		;;
+	sun386 | sun386i | roadrunner)
+		basic_machine=i386-sun
+		;;
+	symmetry)
+		basic_machine=i386-sequent
+		os=-dynix
+		;;
+	tx39)
+		basic_machine=mipstx39-unknown
+		;;
+	tx39el)
+		basic_machine=mipstx39el-unknown
+		;;
+	tower | tower-32)
+		basic_machine=m68k-ncr
+		;;
+	udi29k)
+		basic_machine=a29k-amd
+		os=-udi
+		;;
+	ultra3)
+		basic_machine=a29k-nyu
+		os=-sym1
+		;;
+	vaxv)
+		basic_machine=vax-dec
+		os=-sysv
+		;;
+	vms)
+		basic_machine=vax-dec
+		os=-vms
+		;;
+	vpp*|vx|vx-*)
+               basic_machine=f301-fujitsu
+               ;;
+	vxworks960)
+		basic_machine=i960-wrs
+		os=-vxworks
+		;;
+	vxworks68)
+		basic_machine=m68k-wrs
+		os=-vxworks
+		;;
+	vxworks29k)
+		basic_machine=a29k-wrs
+		os=-vxworks
+		;;
+	xmp)
+		basic_machine=xmp-cray
+		os=-unicos
+		;;
+        xps | xps100)
+		basic_machine=xps100-honeywell
+		;;
+	none)
+		basic_machine=none-none
+		os=-none
+		;;
+
+# Here we handle the default manufacturer of certain CPU types.  It is in
+# some cases the only manufacturer, in others, it is the most popular.
+	mips)
+		if [ x$os = x-linux-gnu ]; then
+			basic_machine=mips-unknown
+		else
+			basic_machine=mips-mips
+		fi
+		;;
+	romp)
+		basic_machine=romp-ibm
+		;;
+	rs6000)
+		basic_machine=rs6000-ibm
+		;;
+	vax)
+		basic_machine=vax-dec
+		;;
+	pdp11)
+		basic_machine=pdp11-dec
+		;;
+	we32k)
+		basic_machine=we32k-att
+		;;
+	sparc)
+		basic_machine=sparc-sun
+		;;
+        cydra)
+		basic_machine=cydra-cydrome
+		;;
+	orion)
+		basic_machine=orion-highlevel
+		;;
+	orion105)
+		basic_machine=clipper-highlevel
+		;;
+	*)
+		echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
+		exit 1
+		;;
+esac
+
+# Here we canonicalize certain aliases for manufacturers.
+case $basic_machine in
+	*-digital*)
+		basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
+		;;
+	*-commodore*)
+		basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
+		;;
+	*)
+		;;
+esac
+
+# Decode manufacturer-specific aliases for certain operating systems.
+
+if [ x"$os" != x"" ]
+then
+case $os in
+        # First match some system type aliases
+        # that might get confused with valid system types.
+	# -solaris* is a basic system type, with this one exception.
+	-solaris1 | -solaris1.*)
+		os=`echo $os | sed -e 's|solaris1|sunos4|'`
+		;;
+	-solaris)
+		os=-solaris2
+		;;
+	-svr4*)
+		os=-sysv4
+		;;
+	-unixware*)
+		os=-sysv4.2uw
+		;;
+	-gnu/linux*)
+		os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'`
+		;;
+	# First accept the basic system types.
+	# The portable systems comes first.
+	# Each alternative MUST END IN A *, to match a version number.
+	# -sysv* is not here because it comes later, after sysvr4.
+	-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
+	      | -*vms* | -sco* | -esix* | -isc* | -aix* | -sunos | -sunos[34]*\
+	      | -hpux* | -unos* | -osf* | -luna* | -dgux* | -solaris* | -sym* \
+	      | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
+	      | -aos* \
+	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
+	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
+	      | -hiux* | -386bsd* | -netbsd* | -openbsd* | -freebsd* | -riscix* \
+	      | -lynxos* | -bosx* | -nextstep* | -cxux* | -aout* | -elf* \
+	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
+	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
+	      | -cygwin32* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
+	      | -mingw32* | -linux-gnu* | -uxpv*)
+	# Remember, each alternative MUST END IN *, to match a version number.
+		;;
+	-linux*)
+		os=`echo $os | sed -e 's|linux|linux-gnu|'`
+		;;
+	-sunos5*)
+		os=`echo $os | sed -e 's|sunos5|solaris2|'`
+		;;
+	-sunos6*)
+		os=`echo $os | sed -e 's|sunos6|solaris3|'`
+		;;
+	-osfrose*)
+		os=-osfrose
+		;;
+	-osf*)
+		os=-osf
+		;;
+	-utek*)
+		os=-bsd
+		;;
+	-dynix*)
+		os=-bsd
+		;;
+	-acis*)
+		os=-aos
+		;;
+	-ctix* | -uts*)
+		os=-sysv
+		;;
+	-ns2 )
+	        os=-nextstep2
+		;;
+	# Preserve the version number of sinix5.
+	-sinix5.*)
+		os=`echo $os | sed -e 's|sinix|sysv|'`
+		;;
+	-sinix*)
+		os=-sysv4
+		;;
+	-triton*)
+		os=-sysv3
+		;;
+	-oss*)
+		os=-sysv3
+		;;
+	-svr4)
+		os=-sysv4
+		;;
+	-svr3)
+		os=-sysv3
+		;;
+	-sysvr4)
+		os=-sysv4
+		;;
+	# This must come after -sysvr4.
+	-sysv*)
+		;;
+	-xenix)
+		os=-xenix
+		;;
+	-none)
+		;;
+	*)
+		# Get rid of the `-' at the beginning of $os.
+		os=`echo $os | sed 's/[^-]*-//'`
+		echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
+		exit 1
+		;;
+esac
+else
+
+# Here we handle the default operating systems that come with various machines.
+# The value should be what the vendor currently ships out the door with their
+# machine or put another way, the most popular os provided with the machine.
+
+# Note that if you're going to try to match "-MANUFACTURER" here (say,
+# "-sun"), then you have to tell the case statement up towards the top
+# that MANUFACTURER isn't an operating system.  Otherwise, code above
+# will signal an error saying that MANUFACTURER isn't an operating
+# system, and we'll never get to this point.
+
+case $basic_machine in
+	*-acorn)
+		os=-riscix1.2
+		;;
+	arm*-semi)
+		os=-aout
+		;;
+        pdp11-*)
+		os=-none
+		;;
+	*-dec | vax-*)
+		os=-ultrix4.2
+		;;
+	m68*-apollo)
+		os=-domain
+		;;
+	i386-sun)
+		os=-sunos4.0.2
+		;;
+	m68000-sun)
+		os=-sunos3
+		# This also exists in the configure program, but was not the
+		# default.
+		# os=-sunos4
+		;;
+	*-tti)	# must be before sparc entry or we get the wrong os.
+		os=-sysv3
+		;;
+	sparc-* | *-sun)
+		os=-sunos4.1.1
+		;;
+	*-ibm)
+		os=-aix
+		;;
+	*-hp)
+		os=-hpux
+		;;
+	*-hitachi)
+		os=-hiux
+		;;
+	i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
+		os=-sysv
+		;;
+	*-cbm)
+		os=-amigaos
+		;;
+	*-dg)
+		os=-dgux
+		;;
+	*-dolphin)
+		os=-sysv3
+		;;
+	m68k-ccur)
+		os=-rtu
+		;;
+	m88k-omron*)
+		os=-luna
+		;;
+	*-next )
+		os=-nextstep
+		;;
+	*-sequent)
+		os=-ptx
+		;;
+	*-crds)
+		os=-unos
+		;;
+	*-ns)
+		os=-genix
+		;;
+	i370-*)
+		os=-mvs
+		;;
+	*-next)
+		os=-nextstep3
+		;;
+        *-gould)
+		os=-sysv
+		;;
+        *-highlevel)
+		os=-bsd
+		;;
+	*-encore)
+		os=-bsd
+		;;
+        *-sgi)
+		os=-irix
+		;;
+        *-siemens)
+		os=-sysv4
+		;;
+	*-masscomp)
+		os=-rtu
+		;;
+	f301-fujitsu)
+		os=-uxpv
+		;;
+	*)
+		os=-none
+		;;
+esac
+fi
+
+# Here we handle the case where we know the os, and the CPU type, but not the
+# manufacturer.  We pick the logical manufacturer.
+vendor=unknown
+case $basic_machine in
+	*-unknown)
+		case $os in
+			-riscix*)
+				vendor=acorn
+				;;
+			-sunos*)
+				vendor=sun
+				;;
+			-aix*)
+				vendor=ibm
+				;;
+			-hpux*)
+				vendor=hp
+				;;
+			-hiux*)
+				vendor=hitachi
+				;;
+			-unos*)
+				vendor=crds
+				;;
+			-dgux*)
+				vendor=dg
+				;;
+			-luna*)
+				vendor=omron
+				;;
+			-genix*)
+				vendor=ns
+				;;
+			-mvs*)
+				vendor=ibm
+				;;
+			-ptx*)
+				vendor=sequent
+				;;
+			-vxsim* | -vxworks*)
+				vendor=wrs
+				;;
+			-aux*)
+				vendor=apple
+				;;
+		esac
+		basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
+		;;
+esac
+
+echo $basic_machine$os
diff --git a/common/jpeg/configure b/common/jpeg/configure
new file mode 100755
index 00000000..35c9db5c
--- /dev/null
+++ b/common/jpeg/configure
@@ -0,0 +1,2011 @@
+#! /bin/sh
+
+# Guess values for system-dependent variables and create Makefiles.
+# Generated automatically using autoconf version 2.12 
+# Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc.
+#
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+
+# Defaults:
+ac_help=
+ac_default_prefix=/usr/local
+# Any additions from configure.in:
+ac_help="$ac_help
+  --enable-shared         build shared library using GNU libtool"
+ac_help="$ac_help
+  --enable-static         build static library using GNU libtool"
+ac_help="$ac_help
+  --enable-maxmem[=N]     enable use of temp files, set max mem usage to N MB"
+ac_help="$ac_help
+"
+
+# Initialize some variables set by options.
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+build=NONE
+cache_file=./config.cache
+exec_prefix=NONE
+host=NONE
+no_create=
+nonopt=NONE
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+target=NONE
+verbose=
+x_includes=NONE
+x_libraries=NONE
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datadir='${prefix}/share'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+libdir='${exec_prefix}/lib'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+infodir='${prefix}/info'
+mandir='${prefix}/man'
+
+# Initialize some other variables.
+subdirs=
+MFLAGS= MAKEFLAGS=
+# Maximum number of lines to put in a shell here document.
+ac_max_here_lines=12
+
+ac_prev=
+for ac_option
+do
+
+  # If the previous option needs an argument, assign it.
+  if test -n "$ac_prev"; then
+    eval "$ac_prev=\$ac_option"
+    ac_prev=
+    continue
+  fi
+
+  case "$ac_option" in
+  -*=*) ac_optarg=`echo "$ac_option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
+  *) ac_optarg= ;;
+  esac
+
+  # Accept the important Cygnus configure options, so we can diagnose typos.
+
+  case "$ac_option" in
+
+  -bindir | --bindir | --bindi | --bind | --bin | --bi)
+    ac_prev=bindir ;;
+  -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+    bindir="$ac_optarg" ;;
+
+  -build | --build | --buil | --bui | --bu)
+    ac_prev=build ;;
+  -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+    build="$ac_optarg" ;;
+
+  -cache-file | --cache-file | --cache-fil | --cache-fi \
+  | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+    ac_prev=cache_file ;;
+  -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+  | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+    cache_file="$ac_optarg" ;;
+
+  -datadir | --datadir | --datadi | --datad | --data | --dat | --da)
+    ac_prev=datadir ;;
+  -datadir=* | --datadir=* | --datadi=* | --datad=* | --data=* | --dat=* \
+  | --da=*)
+    datadir="$ac_optarg" ;;
+
+  -disable-* | --disable-*)
+    ac_feature=`echo $ac_option|sed -e 's/-*disable-//'`
+    # Reject names that are not valid shell variable names.
+    if test -n "`echo $ac_feature| sed 's/[-a-zA-Z0-9_]//g'`"; then
+      { echo "configure: error: $ac_feature: invalid feature name" 1>&2; exit 1; }
+    fi
+    ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+    eval "enable_${ac_feature}=no" ;;
+
+  -enable-* | --enable-*)
+    ac_feature=`echo $ac_option|sed -e 's/-*enable-//' -e 's/=.*//'`
+    # Reject names that are not valid shell variable names.
+    if test -n "`echo $ac_feature| sed 's/[-_a-zA-Z0-9]//g'`"; then
+      { echo "configure: error: $ac_feature: invalid feature name" 1>&2; exit 1; }
+    fi
+    ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+    case "$ac_option" in
+      *=*) ;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "enable_${ac_feature}='$ac_optarg'" ;;
+
+  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+  | --exec | --exe | --ex)
+    ac_prev=exec_prefix ;;
+  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+  | --exec=* | --exe=* | --ex=*)
+    exec_prefix="$ac_optarg" ;;
+
+  -gas | --gas | --ga | --g)
+    # Obsolete; use --with-gas.
+    with_gas=yes ;;
+
+  -help | --help | --hel | --he)
+    # Omit some internal or obsolete options to make the list less imposing.
+    # This message is too long to be a string in the A/UX 3.1 sh.
+    cat << EOF
+Usage: configure [options] [host]
+Options: [defaults in brackets after descriptions]
+Configuration:
+  --cache-file=FILE       cache test results in FILE
+  --help                  print this message
+  --no-create             do not create output files
+  --quiet, --silent       do not print \`checking...' messages
+  --version               print the version of autoconf that created configure
+Directory and file names:
+  --prefix=PREFIX         install architecture-independent files in PREFIX
+                          [$ac_default_prefix]
+  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
+                          [same as prefix]
+  --bindir=DIR            user executables in DIR [EPREFIX/bin]
+  --sbindir=DIR           system admin executables in DIR [EPREFIX/sbin]
+  --libexecdir=DIR        program executables in DIR [EPREFIX/libexec]
+  --datadir=DIR           read-only architecture-independent data in DIR
+                          [PREFIX/share]
+  --sysconfdir=DIR        read-only single-machine data in DIR [PREFIX/etc]
+  --sharedstatedir=DIR    modifiable architecture-independent data in DIR
+                          [PREFIX/com]
+  --localstatedir=DIR     modifiable single-machine data in DIR [PREFIX/var]
+  --libdir=DIR            object code libraries in DIR [EPREFIX/lib]
+  --includedir=DIR        C header files in DIR [PREFIX/include]
+  --oldincludedir=DIR     C header files for non-gcc in DIR [/usr/include]
+  --infodir=DIR           info documentation in DIR [PREFIX/info]
+  --mandir=DIR            man documentation in DIR [PREFIX/man]
+  --srcdir=DIR            find the sources in DIR [configure dir or ..]
+  --program-prefix=PREFIX prepend PREFIX to installed program names
+  --program-suffix=SUFFIX append SUFFIX to installed program names
+  --program-transform-name=PROGRAM
+                          run sed PROGRAM on installed program names
+EOF
+    cat << EOF
+Host type:
+  --build=BUILD           configure for building on BUILD [BUILD=HOST]
+  --host=HOST             configure for HOST [guessed]
+  --target=TARGET         configure for TARGET [TARGET=HOST]
+Features and packages:
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
+  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --x-includes=DIR        X include files are in DIR
+  --x-libraries=DIR       X library files are in DIR
+EOF
+    if test -n "$ac_help"; then
+      echo "--enable and --with options recognized:$ac_help"
+    fi
+    exit 0 ;;
+
+  -host | --host | --hos | --ho)
+    ac_prev=host ;;
+  -host=* | --host=* | --hos=* | --ho=*)
+    host="$ac_optarg" ;;
+
+  -includedir | --includedir | --includedi | --included | --include \
+  | --includ | --inclu | --incl | --inc)
+    ac_prev=includedir ;;
+  -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
+  | --includ=* | --inclu=* | --incl=* | --inc=*)
+    includedir="$ac_optarg" ;;
+
+  -infodir | --infodir | --infodi | --infod | --info | --inf)
+    ac_prev=infodir ;;
+  -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
+    infodir="$ac_optarg" ;;
+
+  -libdir | --libdir | --libdi | --libd)
+    ac_prev=libdir ;;
+  -libdir=* | --libdir=* | --libdi=* | --libd=*)
+    libdir="$ac_optarg" ;;
+
+  -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
+  | --libexe | --libex | --libe)
+    ac_prev=libexecdir ;;
+  -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
+  | --libexe=* | --libex=* | --libe=*)
+    libexecdir="$ac_optarg" ;;
+
+  -localstatedir | --localstatedir | --localstatedi | --localstated \
+  | --localstate | --localstat | --localsta | --localst \
+  | --locals | --local | --loca | --loc | --lo)
+    ac_prev=localstatedir ;;
+  -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+  | --localstate=* | --localstat=* | --localsta=* | --localst=* \
+  | --locals=* | --local=* | --loca=* | --loc=* | --lo=*)
+    localstatedir="$ac_optarg" ;;
+
+  -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+    ac_prev=mandir ;;
+  -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+    mandir="$ac_optarg" ;;
+
+  -nfp | --nfp | --nf)
+    # Obsolete; use --without-fp.
+    with_fp=no ;;
+
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c)
+    no_create=yes ;;
+
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+    no_recursion=yes ;;
+
+  -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+  | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+  | --oldin | --oldi | --old | --ol | --o)
+    ac_prev=oldincludedir ;;
+  -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+  | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+  | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+    oldincludedir="$ac_optarg" ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix="$ac_optarg" ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix="$ac_optarg" ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix="$ac_optarg" ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name="$ac_optarg" ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+    ac_prev=sbindir ;;
+  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+  | --sbi=* | --sb=*)
+    sbindir="$ac_optarg" ;;
+
+  -sharedstatedir | --sharedstatedir | --sharedstatedi \
+  | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+  | --sharedst | --shareds | --shared | --share | --shar \
+  | --sha | --sh)
+    ac_prev=sharedstatedir ;;
+  -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+  | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+  | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+  | --sha=* | --sh=*)
+    sharedstatedir="$ac_optarg" ;;
+
+  -site | --site | --sit)
+    ac_prev=site ;;
+  -site=* | --site=* | --sit=*)
+    site="$ac_optarg" ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir="$ac_optarg" ;;
+
+  -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+  | --syscon | --sysco | --sysc | --sys | --sy)
+    ac_prev=sysconfdir ;;
+  -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+  | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+    sysconfdir="$ac_optarg" ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target="$ac_optarg" ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers)
+    echo "configure generated by autoconf version 2.12"
+    exit 0 ;;
+
+  -with-* | --with-*)
+    ac_package=`echo $ac_option|sed -e 's/-*with-//' -e 's/=.*//'`
+    # Reject names that are not valid shell variable names.
+    if test -n "`echo $ac_package| sed 's/[-_a-zA-Z0-9]//g'`"; then
+      { echo "configure: error: $ac_package: invalid package name" 1>&2; exit 1; }
+    fi
+    ac_package=`echo $ac_package| sed 's/-/_/g'`
+    case "$ac_option" in
+      *=*) ;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "with_${ac_package}='$ac_optarg'" ;;
+
+  -without-* | --without-*)
+    ac_package=`echo $ac_option|sed -e 's/-*without-//'`
+    # Reject names that are not valid shell variable names.
+    if test -n "`echo $ac_package| sed 's/[-a-zA-Z0-9_]//g'`"; then
+      { echo "configure: error: $ac_package: invalid package name" 1>&2; exit 1; }
+    fi
+    ac_package=`echo $ac_package| sed 's/-/_/g'`
+    eval "with_${ac_package}=no" ;;
+
+  --x)
+    # Obsolete; use --with-x.
+    with_x=yes ;;
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes="$ac_optarg" ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries="$ac_optarg" ;;
+
+  -*) { echo "configure: error: $ac_option: invalid option; use --help to show usage" 1>&2; exit 1; }
+    ;;
+
+  *=*)
+    varname=`echo "$ac_option"|sed -e 's/=.*//'`
+    # Reject names that aren't valid shell variable names.
+    if test -n "`echo $varname| sed 's/[a-zA-Z0-9_]//g'`"; then
+      { echo "configure: error: $varname: invalid shell variable name" 1>&2; exit 1; }
+    fi
+    val="`echo "$ac_option"|sed 's/[^=]*=//'`"
+    test -n "$verbose" && echo "	setting shell variable $varname to $val"
+    eval "$varname='$val'"
+    eval "export $varname" ;;
+
+  *)
+    if test -n "`echo $ac_option| sed 's/[-a-z0-9.]//g'`"; then
+      echo "configure: warning: $ac_option: invalid host type" 1>&2
+    fi
+    if test "x$nonopt" != xNONE; then
+      { echo "configure: error: can only configure for one host and one target at a time" 1>&2; exit 1; }
+    fi
+    nonopt="$ac_option"
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  { echo "configure: error: missing argument to --`echo $ac_prev | sed 's/_/-/g'`" 1>&2; exit 1; }
+fi
+
+trap 'rm -fr conftest* confdefs* core core.* *.core $ac_clean_files; exit 1' 1 2 15
+
+# File descriptor usage:
+# 0 standard input
+# 1 file creation
+# 2 errors and warnings
+# 3 some systems may open it to /dev/tty
+# 4 used on the Kubota Titan
+# 6 checking for... messages and results
+# 5 compiler messages saved in config.log
+if test "$silent" = yes; then
+  exec 6>/dev/null
+else
+  exec 6>&1
+fi
+exec 5>./config.log
+
+echo "\
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+" 1>&5
+
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Also quote any args containing shell metacharacters.
+ac_configure_args=
+for ac_arg
+do
+  case "$ac_arg" in
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c) ;;
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r) ;;
+  *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?]*)
+  ac_configure_args="$ac_configure_args '$ac_arg'" ;;
+  *) ac_configure_args="$ac_configure_args $ac_arg" ;;
+  esac
+done
+
+# NLS nuisances.
+# Only set these to C if already set.  These must not be set unconditionally
+# because not all systems understand e.g. LANG=C (notably SCO).
+# Fixing LC_MESSAGES prevents Solaris sh from translating var values in `set'!
+# Non-C LC_CTYPE values break the ctype check.
+if test "${LANG+set}"   = set; then LANG=C;   export LANG;   fi
+if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
+if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
+if test "${LC_CTYPE+set}"    = set; then LC_CTYPE=C;    export LC_CTYPE;    fi
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -rf conftest* confdefs.h
+# AIX cpp loses on an empty file, so make sure it contains at least a newline.
+echo > confdefs.h
+
+# A filename unique to this package, relative to the directory that
+# configure is in, which we can look for to find out if srcdir is correct.
+ac_unique_file=jcmaster.c
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then its parent.
+  ac_prog=$0
+  ac_confdir=`echo $ac_prog|sed 's%/[^/][^/]*$%%'`
+  test "x$ac_confdir" = "x$ac_prog" && ac_confdir=.
+  srcdir=$ac_confdir
+  if test ! -r $srcdir/$ac_unique_file; then
+    srcdir=..
+  fi
+else
+  ac_srcdir_defaulted=no
+fi
+if test ! -r $srcdir/$ac_unique_file; then
+  if test "$ac_srcdir_defaulted" = yes; then
+    { echo "configure: error: can not find sources in $ac_confdir or .." 1>&2; exit 1; }
+  else
+    { echo "configure: error: can not find sources in $srcdir" 1>&2; exit 1; }
+  fi
+fi
+srcdir=`echo "${srcdir}" | sed 's%\([^/]\)/*$%\1%'`
+
+# Prefer explicitly selected file to automatically selected ones.
+if test -z "$CONFIG_SITE"; then
+  if test "x$prefix" != xNONE; then
+    CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
+  else
+    CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+  fi
+fi
+for ac_site_file in $CONFIG_SITE; do
+  if test -r "$ac_site_file"; then
+    echo "loading site script $ac_site_file"
+    . "$ac_site_file"
+  fi
+done
+
+
+ac_ext=c
+# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+cross_compiling=$ac_cv_prog_cc_cross
+
+if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
+  # Stardent Vistra SVR4 grep lacks -e, says ghazi@caip.rutgers.edu.
+  if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
+    ac_n= ac_c='
+' ac_t='	'
+  else
+    ac_n=-n ac_c= ac_t=
+  fi
+else
+  ac_n= ac_c='\c' ac_t=
+fi
+
+
+
+# Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
+echo "configure:538: checking for $ac_word" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/$ac_word; then
+      ac_cv_prog_CC="gcc"
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+fi
+fi
+CC="$ac_cv_prog_CC"
+if test -n "$CC"; then
+  echo "$ac_t""$CC" 1>&6
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
+echo "configure:567: checking for $ac_word" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+  ac_prog_rejected=no
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/$ac_word; then
+      if test "$ac_dir/$ac_word" = "/usr/ucb/cc"; then
+        ac_prog_rejected=yes
+	continue
+      fi
+      ac_cv_prog_CC="cc"
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# -gt 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    set dummy "$ac_dir/$ac_word" "$@"
+    shift
+    ac_cv_prog_CC="$@"
+  fi
+fi
+fi
+fi
+CC="$ac_cv_prog_CC"
+if test -n "$CC"; then
+  echo "$ac_t""$CC" 1>&6
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+  test -z "$CC" && { echo "configure: error: no acceptable cc found in \$PATH" 1>&2; exit 1; }
+fi
+
+echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
+echo "configure:615: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+
+ac_ext=c
+# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+cross_compiling=$ac_cv_prog_cc_cross
+
+cat > conftest.$ac_ext <<EOF
+#line 625 "configure"
+#include "confdefs.h"
+main(){return(0);}
+EOF
+if { (eval echo configure:629: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  ac_cv_prog_cc_works=yes
+  # If we can't run a trivial program, we are probably using a cross compiler.
+  if (./conftest; exit) 2>/dev/null; then
+    ac_cv_prog_cc_cross=no
+  else
+    ac_cv_prog_cc_cross=yes
+  fi
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  ac_cv_prog_cc_works=no
+fi
+rm -fr conftest*
+
+echo "$ac_t""$ac_cv_prog_cc_works" 1>&6
+if test $ac_cv_prog_cc_works = no; then
+  { echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
+fi
+echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
+echo "configure:649: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
+cross_compiling=$ac_cv_prog_cc_cross
+
+echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
+echo "configure:654: checking whether we are using GNU C" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.c <<EOF
+#ifdef __GNUC__
+  yes;
+#endif
+EOF
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:663: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+  ac_cv_prog_gcc=yes
+else
+  ac_cv_prog_gcc=no
+fi
+fi
+
+echo "$ac_t""$ac_cv_prog_gcc" 1>&6
+
+if test $ac_cv_prog_gcc = yes; then
+  GCC=yes
+  test "${CFLAGS+set}" = set || CFLAGS="-O2"
+else
+  GCC=
+  test "${CFLAGS+set}" = set || CFLAGS="-O"
+fi
+
+echo $ac_n "checking how to run the C preprocessor""... $ac_c" 1>&6
+echo "configure:681: checking how to run the C preprocessor" >&5
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+  CPP=
+fi
+if test -z "$CPP"; then
+if eval "test \"`echo '$''{'ac_cv_prog_CPP'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+    # This must be in double quotes, not single quotes, because CPP may get
+  # substituted into the Makefile and "${CC-cc}" will confuse make.
+  CPP="${CC-cc} -E"
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp.
+  cat > conftest.$ac_ext <<EOF
+#line 696 "configure"
+#include "confdefs.h"
+#include <assert.h>
+Syntax Error
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:702: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+  :
+else
+  echo "$ac_err" >&5
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  CPP="${CC-cc} -E -traditional-cpp"
+  cat > conftest.$ac_ext <<EOF
+#line 713 "configure"
+#include "confdefs.h"
+#include <assert.h>
+Syntax Error
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:719: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+  :
+else
+  echo "$ac_err" >&5
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  CPP=/lib/cpp
+fi
+rm -f conftest*
+fi
+rm -f conftest*
+  ac_cv_prog_CPP="$CPP"
+fi
+  CPP="$ac_cv_prog_CPP"
+else
+  ac_cv_prog_CPP="$CPP"
+fi
+echo "$ac_t""$CPP" 1>&6
+
+echo $ac_n "checking for function prototypes""... $ac_c" 1>&6
+echo "configure:742: checking for function prototypes" >&5
+if eval "test \"`echo '$''{'ijg_cv_have_prototypes'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 747 "configure"
+#include "confdefs.h"
+
+int testfunction (int arg1, int * arg2); /* check prototypes */
+struct methods_struct {		/* check method-pointer declarations */
+  int (*error_exit) (char *msgtext);
+  int (*trace_message) (char *msgtext);
+  int (*another_method) (void);
+};
+int testfunction (int arg1, int * arg2) /* check definitions */
+{ return arg2[arg1]; }
+int test2function (void)	/* check void arg list */
+{ return 0; }
+
+int main() {
+ 
+; return 0; }
+EOF
+if { (eval echo configure:765: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ijg_cv_have_prototypes=yes
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  ijg_cv_have_prototypes=no
+fi
+rm -f conftest*
+fi
+
+echo "$ac_t""$ijg_cv_have_prototypes" 1>&6
+if test $ijg_cv_have_prototypes = yes; then
+  cat >> confdefs.h <<\EOF
+#define HAVE_PROTOTYPES 
+EOF
+
+else
+  echo Your compiler does not seem to know about function prototypes.
+  echo Perhaps it needs a special switch to enable ANSI C mode.
+  echo If so, we recommend running configure like this:
+  echo "   ./configure  CC='cc -switch'"
+  echo where -switch is the proper switch.
+fi
+ac_safe=`echo "stddef.h" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for stddef.h""... $ac_c" 1>&6
+echo "configure:792: checking for stddef.h" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 797 "configure"
+#include "confdefs.h"
+#include <stddef.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:802: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=yes"
+else
+  echo "$ac_err" >&5
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+  cat >> confdefs.h <<\EOF
+#define HAVE_STDDEF_H 
+EOF
+
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+ac_safe=`echo "stdlib.h" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for stdlib.h""... $ac_c" 1>&6
+echo "configure:828: checking for stdlib.h" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 833 "configure"
+#include "confdefs.h"
+#include <stdlib.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:838: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=yes"
+else
+  echo "$ac_err" >&5
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+  cat >> confdefs.h <<\EOF
+#define HAVE_STDLIB_H 
+EOF
+
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+ac_safe=`echo "string.h" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for string.h""... $ac_c" 1>&6
+echo "configure:864: checking for string.h" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 869 "configure"
+#include "confdefs.h"
+#include <string.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:874: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=yes"
+else
+  echo "$ac_err" >&5
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+  :
+else
+  echo "$ac_t""no" 1>&6
+cat >> confdefs.h <<\EOF
+#define NEED_BSD_STRINGS 
+EOF
+
+fi
+
+echo $ac_n "checking for size_t""... $ac_c" 1>&6
+echo "configure:900: checking for size_t" >&5
+cat > conftest.$ac_ext <<EOF
+#line 902 "configure"
+#include "confdefs.h"
+
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#include <stdio.h>
+#ifdef NEED_BSD_STRINGS
+#include <strings.h>
+#else
+#include <string.h>
+#endif
+typedef size_t my_size_t;
+
+int main() {
+ my_size_t foovar; 
+; return 0; }
+EOF
+if { (eval echo configure:923: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ijg_size_t_ok=yes
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  ijg_size_t_ok="not ANSI, perhaps it is in sys/types.h"
+fi
+rm -f conftest*
+echo "$ac_t""$ijg_size_t_ok" 1>&6
+if test "$ijg_size_t_ok" != yes; then
+ac_safe=`echo "sys/types.h" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for sys/types.h""... $ac_c" 1>&6
+echo "configure:937: checking for sys/types.h" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 942 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:947: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=yes"
+else
+  echo "$ac_err" >&5
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_header_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+  cat >> confdefs.h <<\EOF
+#define NEED_SYS_TYPES_H 
+EOF
+
+cat > conftest.$ac_ext <<EOF
+#line 968 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+EOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  egrep "size_t" >/dev/null 2>&1; then
+  rm -rf conftest*
+  ijg_size_t_ok="size_t is in sys/types.h"
+else
+  rm -rf conftest*
+  ijg_size_t_ok=no
+fi
+rm -f conftest*
+
+else
+  echo "$ac_t""no" 1>&6
+ijg_size_t_ok=no
+fi
+
+echo "$ac_t""$ijg_size_t_ok" 1>&6
+if test "$ijg_size_t_ok" = no; then
+  echo Type size_t is not defined in any of the usual places.
+  echo Try putting '"typedef unsigned int size_t;"' in jconfig.h.
+fi
+fi
+echo $ac_n "checking for type unsigned char""... $ac_c" 1>&6
+echo "configure:994: checking for type unsigned char" >&5
+cat > conftest.$ac_ext <<EOF
+#line 996 "configure"
+#include "confdefs.h"
+
+int main() {
+ unsigned char un_char; 
+; return 0; }
+EOF
+if { (eval echo configure:1003: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  echo "$ac_t""yes" 1>&6
+cat >> confdefs.h <<\EOF
+#define HAVE_UNSIGNED_CHAR 
+EOF
+
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  echo "$ac_t""no" 1>&6
+fi
+rm -f conftest*
+echo $ac_n "checking for type unsigned short""... $ac_c" 1>&6
+echo "configure:1018: checking for type unsigned short" >&5
+cat > conftest.$ac_ext <<EOF
+#line 1020 "configure"
+#include "confdefs.h"
+
+int main() {
+ unsigned short un_short; 
+; return 0; }
+EOF
+if { (eval echo configure:1027: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  echo "$ac_t""yes" 1>&6
+cat >> confdefs.h <<\EOF
+#define HAVE_UNSIGNED_SHORT 
+EOF
+
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  echo "$ac_t""no" 1>&6
+fi
+rm -f conftest*
+echo $ac_n "checking for type void""... $ac_c" 1>&6
+echo "configure:1042: checking for type void" >&5
+cat > conftest.$ac_ext <<EOF
+#line 1044 "configure"
+#include "confdefs.h"
+
+/* Caution: a C++ compiler will insist on valid prototypes */
+typedef void * void_ptr;	/* check void * */
+#ifdef HAVE_PROTOTYPES		/* check ptr to function returning void */
+typedef void (*void_func) (int a, int b);
+#else
+typedef void (*void_func) ();
+#endif
+
+#ifdef HAVE_PROTOTYPES		/* check void function result */
+void test3function (void_ptr arg1, void_func arg2)
+#else
+void test3function (arg1, arg2)
+     void_ptr arg1;
+     void_func arg2;
+#endif
+{
+  char * locptr = (char *) arg1; /* check casting to and from void * */
+  arg1 = (void *) locptr;
+  (*arg2) (1, 2);		/* check call of fcn returning void */
+}
+
+int main() {
+ 
+; return 0; }
+EOF
+if { (eval echo configure:1072: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  echo "$ac_t""yes" 1>&6
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  echo "$ac_t""no" 1>&6
+cat >> confdefs.h <<\EOF
+#define void char
+EOF
+
+fi
+rm -f conftest*
+
+echo $ac_n "checking for working const""... $ac_c" 1>&6
+echo "configure:1088: checking for working const" >&5
+if eval "test \"`echo '$''{'ac_cv_c_const'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1093 "configure"
+#include "confdefs.h"
+
+int main() {
+
+/* Ultrix mips cc rejects this.  */
+typedef int charset[2]; const charset x;
+/* SunOS 4.1.1 cc rejects this.  */
+char const *const *ccp;
+char **p;
+/* NEC SVR4.0.2 mips cc rejects this.  */
+struct point {int x, y;};
+static struct point const zero = {0,0};
+/* AIX XL C 1.02.0.0 rejects this.
+   It does not let you subtract one const X* pointer from another in an arm
+   of an if-expression whose if-part is not a constant expression */
+const char *g = "string";
+ccp = &g + (g ? g-g : 0);
+/* HPUX 7.0 cc rejects these. */
+++ccp;
+p = (char**) ccp;
+ccp = (char const *const *) p;
+{ /* SCO 3.2v4 cc rejects this.  */
+  char *t;
+  char const *s = 0 ? (char *) 0 : (char const *) 0;
+
+  *t++ = 0;
+}
+{ /* Someone thinks the Sun supposedly-ANSI compiler will reject this.  */
+  int x[] = {25, 17};
+  const int *foo = &x[0];
+  ++foo;
+}
+{ /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
+  typedef const int *iptr;
+  iptr p = 0;
+  ++p;
+}
+{ /* AIX XL C 1.02.0.0 rejects this saying
+     "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
+  struct s { int j; const int *ap[3]; };
+  struct s *b; b->j = 5;
+}
+{ /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
+  const int foo = 10;
+}
+
+; return 0; }
+EOF
+if { (eval echo configure:1142: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ac_cv_c_const=yes
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  ac_cv_c_const=no
+fi
+rm -f conftest*
+fi
+
+echo "$ac_t""$ac_cv_c_const" 1>&6
+if test $ac_cv_c_const = no; then
+  cat >> confdefs.h <<\EOF
+#define const 
+EOF
+
+fi
+
+echo $ac_n "checking for inline""... $ac_c" 1>&6
+echo "configure:1163: checking for inline" >&5
+ijg_cv_inline=""
+cat > conftest.$ac_ext <<EOF
+#line 1166 "configure"
+#include "confdefs.h"
+
+int main() {
+} __inline__ int foo() { return 0; }
+int bar() { return foo();
+; return 0; }
+EOF
+if { (eval echo configure:1174: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ijg_cv_inline="__inline__"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  cat > conftest.$ac_ext <<EOF
+#line 1182 "configure"
+#include "confdefs.h"
+
+int main() {
+} __inline int foo() { return 0; }
+int bar() { return foo();
+; return 0; }
+EOF
+if { (eval echo configure:1190: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ijg_cv_inline="__inline"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  cat > conftest.$ac_ext <<EOF
+#line 1198 "configure"
+#include "confdefs.h"
+
+int main() {
+} inline int foo() { return 0; }
+int bar() { return foo();
+; return 0; }
+EOF
+if { (eval echo configure:1206: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  ijg_cv_inline="inline"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+fi
+rm -f conftest*
+fi
+rm -f conftest*
+fi
+rm -f conftest*
+echo "$ac_t""$ijg_cv_inline" 1>&6
+cat >> confdefs.h <<EOF
+#define INLINE $ijg_cv_inline
+EOF
+
+echo $ac_n "checking for broken incomplete types""... $ac_c" 1>&6
+echo "configure:1224: checking for broken incomplete types" >&5
+cat > conftest.$ac_ext <<EOF
+#line 1226 "configure"
+#include "confdefs.h"
+ typedef struct undefined_structure * undef_struct_ptr; 
+int main() {
+
+; return 0; }
+EOF
+if { (eval echo configure:1233: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  echo "$ac_t""ok" 1>&6
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  echo "$ac_t""broken" 1>&6
+cat >> confdefs.h <<\EOF
+#define INCOMPLETE_TYPES_BROKEN 
+EOF
+
+fi
+rm -f conftest*
+echo $ac_n "checking for short external names""... $ac_c" 1>&6
+echo "configure:1248: checking for short external names" >&5
+cat > conftest.$ac_ext <<EOF
+#line 1250 "configure"
+#include "confdefs.h"
+
+int possibly_duplicate_function () { return 0; }
+int possibly_dupli_function () { return 1; }
+
+int main() {
+ 
+; return 0; }
+EOF
+if { (eval echo configure:1260: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  rm -rf conftest*
+  echo "$ac_t""ok" 1>&6
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  echo "$ac_t""short" 1>&6
+cat >> confdefs.h <<\EOF
+#define NEED_SHORT_EXTERNAL_NAMES 
+EOF
+
+fi
+rm -f conftest*
+echo $ac_n "checking to see if char is signed""... $ac_c" 1>&6
+echo "configure:1275: checking to see if char is signed" >&5
+if test "$cross_compiling" = yes; then
+  echo Assuming that char is signed on target machine.
+echo If it is unsigned, this will be a little bit inefficient.
+
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1282 "configure"
+#include "confdefs.h"
+
+#ifdef HAVE_PROTOTYPES
+int is_char_signed (int arg)
+#else
+int is_char_signed (arg)
+     int arg;
+#endif
+{
+  if (arg == 189) {		/* expected result for unsigned char */
+    return 0;			/* type char is unsigned */
+  }
+  else if (arg != -67) {	/* expected result for signed char */
+    printf("Hmm, it seems 'char' is not eight bits wide on your machine.\n");
+    printf("I fear the JPEG software will not work at all.\n\n");
+  }
+  return 1;			/* assume char is signed otherwise */
+}
+char signed_char_check = (char) (-67);
+main() {
+  exit(is_char_signed((int) signed_char_check));
+}
+EOF
+if { (eval echo configure:1306: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+then
+  echo "$ac_t""no" 1>&6
+cat >> confdefs.h <<\EOF
+#define CHAR_IS_UNSIGNED 
+EOF
+
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -fr conftest*
+  echo "$ac_t""yes" 1>&6
+fi
+rm -fr conftest*
+fi
+
+echo $ac_n "checking to see if right shift is signed""... $ac_c" 1>&6
+echo "configure:1323: checking to see if right shift is signed" >&5
+if test "$cross_compiling" = yes; then
+  echo "$ac_t""Assuming that right shift is signed on target machine." 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1328 "configure"
+#include "confdefs.h"
+
+#ifdef HAVE_PROTOTYPES
+int is_shifting_signed (long arg)
+#else
+int is_shifting_signed (arg)
+     long arg;
+#endif
+/* See whether right-shift on a long is signed or not. */
+{
+  long res = arg >> 4;
+
+  if (res == -0x7F7E80CL) {	/* expected result for signed shift */
+    return 1;			/* right shift is signed */
+  }
+  /* see if unsigned-shift hack will fix it. */
+  /* we can't just test exact value since it depends on width of long... */
+  res |= (~0L) << (32-4);
+  if (res == -0x7F7E80CL) {	/* expected result now? */
+    return 0;			/* right shift is unsigned */
+  }
+  printf("Right shift isn't acting as I expect it to.\n");
+  printf("I fear the JPEG software will not work at all.\n\n");
+  return 0;			/* try it with unsigned anyway */
+}
+main() {
+  exit(is_shifting_signed(-0x7F7E80B1L));
+}
+EOF
+if { (eval echo configure:1358: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+then
+  echo "$ac_t""no" 1>&6
+cat >> confdefs.h <<\EOF
+#define RIGHT_SHIFT_IS_UNSIGNED 
+EOF
+
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -fr conftest*
+  echo "$ac_t""yes" 1>&6
+fi
+rm -fr conftest*
+fi
+
+echo $ac_n "checking to see if fopen accepts b spec""... $ac_c" 1>&6
+echo "configure:1375: checking to see if fopen accepts b spec" >&5
+if test "$cross_compiling" = yes; then
+  echo "$ac_t""Assuming that it does." 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1380 "configure"
+#include "confdefs.h"
+
+#include <stdio.h>
+main() {
+  if (fopen("conftestdata", "wb") != NULL)
+    exit(0);
+  exit(1);
+}
+EOF
+if { (eval echo configure:1390: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+then
+  echo "$ac_t""yes" 1>&6
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -fr conftest*
+  echo "$ac_t""no" 1>&6
+cat >> confdefs.h <<\EOF
+#define DONT_USE_B_MODE 
+EOF
+
+fi
+rm -fr conftest*
+fi
+
+ac_aux_dir=
+for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do
+  if test -f $ac_dir/install-sh; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install-sh -c"
+    break
+  elif test -f $ac_dir/install.sh; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install.sh -c"
+    break
+  fi
+done
+if test -z "$ac_aux_dir"; then
+  { echo "configure: error: can not find install-sh or install.sh in $srcdir $srcdir/.. $srcdir/../.." 1>&2; exit 1; }
+fi
+ac_config_guess=$ac_aux_dir/config.guess
+ac_config_sub=$ac_aux_dir/config.sub
+ac_configure=$ac_aux_dir/configure # This should be Cygnus configure.
+
+# Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# ./install, which can be erroneously created by make from ./install.sh.
+echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
+echo "configure:1436: checking for a BSD compatible install" >&5
+if test -z "$INSTALL"; then
+if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+    IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS="${IFS}:"
+  for ac_dir in $PATH; do
+    # Account for people who put trailing slashes in PATH elements.
+    case "$ac_dir/" in
+    /|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;;
+    *)
+      # OSF1 and SCO ODT 3.0 have their own names for install.
+      for ac_prog in ginstall installbsd scoinst install; do
+        if test -f $ac_dir/$ac_prog; then
+	  if test $ac_prog = install &&
+            grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    # OSF/1 installbsd also uses dspmsg, but is usable.
+	    :
+	  else
+	    ac_cv_path_install="$ac_dir/$ac_prog -c"
+	    break 2
+	  fi
+	fi
+      done
+      ;;
+    esac
+  done
+  IFS="$ac_save_IFS"
+
+fi
+  if test "${ac_cv_path_install+set}" = set; then
+    INSTALL="$ac_cv_path_install"
+  else
+    # As a last resort, use the slow shell script.  We don't cache a
+    # path for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the path is relative.
+    INSTALL="$ac_install_sh"
+  fi
+fi
+echo "$ac_t""$INSTALL" 1>&6
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+# Extract the first word of "ranlib", so it can be a program name with args.
+set dummy ranlib; ac_word=$2
+echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
+echo "configure:1488: checking for $ac_word" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  if test -n "$RANLIB"; then
+  ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
+else
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/$ac_word; then
+      ac_cv_prog_RANLIB="ranlib"
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+  test -z "$ac_cv_prog_RANLIB" && ac_cv_prog_RANLIB=":"
+fi
+fi
+RANLIB="$ac_cv_prog_RANLIB"
+if test -n "$RANLIB"; then
+  echo "$ac_t""$RANLIB" 1>&6
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+
+# Decide whether to use libtool,
+# and if so whether to build shared, static, or both flavors of library.
+LTSHARED="no"
+# Check whether --enable-shared or --disable-shared was given.
+if test "${enable_shared+set}" = set; then
+  enableval="$enable_shared"
+  LTSHARED="$enableval"
+fi
+
+LTSTATIC="no"
+# Check whether --enable-static or --disable-static was given.
+if test "${enable_static+set}" = set; then
+  enableval="$enable_static"
+  LTSTATIC="$enableval"
+fi
+
+if test "x$LTSHARED" != xno  -o  "x$LTSTATIC" != xno; then
+  USELIBTOOL="yes"
+  LIBTOOL="./libtool"
+  O="lo"
+  A="la"
+  LN='$(LIBTOOL) --mode=link $(CC)'
+  INSTALL_LIB='$(LIBTOOL) --mode=install ${INSTALL}'
+  INSTALL_PROGRAM="\$(LIBTOOL) --mode=install $INSTALL_PROGRAM"
+else
+  USELIBTOOL="no"
+  LIBTOOL=""
+  O="o"
+  A="a"
+  LN='$(CC)'
+  INSTALL_LIB="$INSTALL_DATA"
+fi
+
+
+
+
+
+
+# Configure libtool if needed.
+if test $USELIBTOOL = yes; then
+  disable_shared=
+  disable_static=
+  if test "x$LTSHARED" = xno; then
+    disable_shared="--disable-shared"
+  fi
+  if test "x$LTSTATIC" = xno; then
+    disable_static="--disable-static"
+  fi
+  $srcdir/ltconfig $disable_shared $disable_static $srcdir/ltmain.sh
+fi
+
+# Select memory manager depending on user input.
+# If no "-enable-maxmem", use jmemnobs
+MEMORYMGR='jmemnobs.$(O)'
+MAXMEM="no"
+# Check whether --enable-maxmem or --disable-maxmem was given.
+if test "${enable_maxmem+set}" = set; then
+  enableval="$enable_maxmem"
+  MAXMEM="$enableval"
+fi
+
+# support --with-maxmem for backwards compatibility with IJG V5.
+# Check whether --with-maxmem or --without-maxmem was given.
+if test "${with_maxmem+set}" = set; then
+  withval="$with_maxmem"
+  MAXMEM="$withval"
+fi
+
+if test "x$MAXMEM" = xyes; then
+  MAXMEM=1
+fi
+if test "x$MAXMEM" != xno; then
+  if test -n "`echo $MAXMEM | sed 's/[0-9]//g'`"; then
+    { echo "configure: error: non-numeric argument to --enable-maxmem" 1>&2; exit 1; }
+  fi
+  DEFAULTMAXMEM=`expr $MAXMEM \* 1048576`
+cat >> confdefs.h <<EOF
+#define DEFAULT_MAX_MEM ${DEFAULTMAXMEM}
+EOF
+
+echo $ac_n "checking for 'tmpfile()'""... $ac_c" 1>&6
+echo "configure:1596: checking for 'tmpfile()'" >&5
+cat > conftest.$ac_ext <<EOF
+#line 1598 "configure"
+#include "confdefs.h"
+#include <stdio.h>
+int main() {
+ FILE * tfile = tmpfile(); 
+; return 0; }
+EOF
+if { (eval echo configure:1605: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  rm -rf conftest*
+  echo "$ac_t""yes" 1>&6
+MEMORYMGR='jmemansi.$(O)'
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  echo "$ac_t""no" 1>&6
+MEMORYMGR='jmemname.$(O)'
+cat >> confdefs.h <<\EOF
+#define NEED_SIGNAL_CATCHER 
+EOF
+
+echo $ac_n "checking for 'mktemp()'""... $ac_c" 1>&6
+echo "configure:1620: checking for 'mktemp()'" >&5
+cat > conftest.$ac_ext <<EOF
+#line 1622 "configure"
+#include "confdefs.h"
+
+int main() {
+ char fname[80]; mktemp(fname); 
+; return 0; }
+EOF
+if { (eval echo configure:1629: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  rm -rf conftest*
+  echo "$ac_t""yes" 1>&6
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  echo "$ac_t""no" 1>&6
+cat >> confdefs.h <<\EOF
+#define NO_MKTEMP 
+EOF
+
+fi
+rm -f conftest*
+fi
+rm -f conftest*
+fi
+
+
+# Extract the library version ID from jpeglib.h.
+echo $ac_n "checking libjpeg version number""... $ac_c" 1>&6
+echo "configure:1650: checking libjpeg version number" >&5
+JPEG_LIB_VERSION=`sed -e '/^#define JPEG_LIB_VERSION/!d' -e 's/^[^0-9]*\([0-9][0-9]*\).*$/\1/' $srcdir/jpeglib.h`
+echo "$ac_t""$JPEG_LIB_VERSION" 1>&6
+
+
+# Prepare to massage makefile.cfg correctly.
+if test $ijg_cv_have_prototypes = yes; then
+  A2K_DEPS=""
+  COM_A2K="# "
+else
+  A2K_DEPS="ansi2knr"
+  COM_A2K=""
+fi
+
+
+# ansi2knr needs -DBSD if string.h is missing
+if test $ac_cv_header_string_h = no; then
+  ANSI2KNRFLAGS="-DBSD"
+else
+  ANSI2KNRFLAGS=""
+fi
+
+# Substitutions to enable or disable libtool-related stuff
+if test $USELIBTOOL = yes -a $ijg_cv_have_prototypes = yes; then
+  COM_LT=""
+else
+  COM_LT="# "
+fi
+
+if test "x$LTSHARED" != xno; then
+  FORCE_INSTALL_LIB="install-lib"
+else
+  FORCE_INSTALL_LIB=""
+fi
+
+# Set up -I directives
+if test "x$srcdir" = x.; then
+  INCLUDEFLAGS='-I$(srcdir)'
+else
+  INCLUDEFLAGS='-I. -I$(srcdir)'
+fi
+
+trap '' 1 2 15
+
+trap 'rm -fr conftest* confdefs* core core.* *.core $ac_clean_files; exit 1' 1 2 15
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+# Any assignment to VPATH causes Sun make to only execute
+# the first set of double-colon rules, so remove it if not needed.
+# If there is a colon in the path, we need to keep it.
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[ 	]*VPATH[ 	]*=[^:]*$/d'
+fi
+
+trap 'rm -f $CONFIG_STATUS conftest*; exit 1' 1 2 15
+
+DEFS=-DHAVE_CONFIG_H
+
+# Without the "./", some shells look in PATH for config.status.
+: ${CONFIG_STATUS=./config.status}
+
+echo creating $CONFIG_STATUS
+rm -f $CONFIG_STATUS
+cat > $CONFIG_STATUS <<EOF
+#! /bin/sh
+# Generated automatically by configure.
+# Run this file to recreate the current configuration.
+# This directory was configured as follows,
+# on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
+#
+# $0 $ac_configure_args
+#
+# Compiler output produced by configure, useful for debugging
+# configure, is in ./config.log if it exists.
+
+ac_cs_usage="Usage: $CONFIG_STATUS [--recheck] [--version] [--help]"
+for ac_option
+do
+  case "\$ac_option" in
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    echo "running \${CONFIG_SHELL-/bin/sh} $0 $ac_configure_args --no-create --no-recursion"
+    exec \${CONFIG_SHELL-/bin/sh} $0 $ac_configure_args --no-create --no-recursion ;;
+  -version | --version | --versio | --versi | --vers | --ver | --ve | --v)
+    echo "$CONFIG_STATUS generated by autoconf version 2.12"
+    exit 0 ;;
+  -help | --help | --hel | --he | --h)
+    echo "\$ac_cs_usage"; exit 0 ;;
+  *) echo "\$ac_cs_usage"; exit 1 ;;
+  esac
+done
+
+ac_given_srcdir=$srcdir
+ac_given_INSTALL="$INSTALL"
+
+trap 'rm -fr `echo "Makefile:makefile.cfg jconfig.h:jconfig.cfg" | sed "s/:[^ ]*//g"` conftest*; exit 1' 1 2 15
+EOF
+cat >> $CONFIG_STATUS <<EOF
+
+# Protect against being on the right side of a sed subst in config.status.
+sed 's/%@/@@/; s/@%/@@/; s/%g\$/@g/; /@g\$/s/[\\\\&%]/\\\\&/g;
+ s/@@/%@/; s/@@/@%/; s/@g\$/%g/' > conftest.subs <<\\CEOF
+$ac_vpsub
+$extrasub
+s%@CFLAGS@%$CFLAGS%g
+s%@CPPFLAGS@%$CPPFLAGS%g
+s%@CXXFLAGS@%$CXXFLAGS%g
+s%@DEFS@%$DEFS%g
+s%@LDFLAGS@%$LDFLAGS%g
+s%@LIBS@%$LIBS%g
+s%@exec_prefix@%$exec_prefix%g
+s%@prefix@%$prefix%g
+s%@program_transform_name@%$program_transform_name%g
+s%@bindir@%$bindir%g
+s%@sbindir@%$sbindir%g
+s%@libexecdir@%$libexecdir%g
+s%@datadir@%$datadir%g
+s%@sysconfdir@%$sysconfdir%g
+s%@sharedstatedir@%$sharedstatedir%g
+s%@localstatedir@%$localstatedir%g
+s%@libdir@%$libdir%g
+s%@includedir@%$includedir%g
+s%@oldincludedir@%$oldincludedir%g
+s%@infodir@%$infodir%g
+s%@mandir@%$mandir%g
+s%@CC@%$CC%g
+s%@CPP@%$CPP%g
+s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g
+s%@INSTALL_DATA@%$INSTALL_DATA%g
+s%@RANLIB@%$RANLIB%g
+s%@LIBTOOL@%$LIBTOOL%g
+s%@O@%$O%g
+s%@A@%$A%g
+s%@LN@%$LN%g
+s%@INSTALL_LIB@%$INSTALL_LIB%g
+s%@MEMORYMGR@%$MEMORYMGR%g
+s%@JPEG_LIB_VERSION@%$JPEG_LIB_VERSION%g
+s%@A2K_DEPS@%$A2K_DEPS%g
+s%@COM_A2K@%$COM_A2K%g
+s%@ANSI2KNRFLAGS@%$ANSI2KNRFLAGS%g
+s%@COM_LT@%$COM_LT%g
+s%@FORCE_INSTALL_LIB@%$FORCE_INSTALL_LIB%g
+s%@INCLUDEFLAGS@%$INCLUDEFLAGS%g
+
+CEOF
+EOF
+
+cat >> $CONFIG_STATUS <<\EOF
+
+# Split the substitutions into bite-sized pieces for seds with
+# small command number limits, like on Digital OSF/1 and HP-UX.
+ac_max_sed_cmds=90 # Maximum number of lines to put in a sed script.
+ac_file=1 # Number of current file.
+ac_beg=1 # First line for current file.
+ac_end=$ac_max_sed_cmds # Line after last line for current file.
+ac_more_lines=:
+ac_sed_cmds=""
+while $ac_more_lines; do
+  if test $ac_beg -gt 1; then
+    sed "1,${ac_beg}d; ${ac_end}q" conftest.subs > conftest.s$ac_file
+  else
+    sed "${ac_end}q" conftest.subs > conftest.s$ac_file
+  fi
+  if test ! -s conftest.s$ac_file; then
+    ac_more_lines=false
+    rm -f conftest.s$ac_file
+  else
+    if test -z "$ac_sed_cmds"; then
+      ac_sed_cmds="sed -f conftest.s$ac_file"
+    else
+      ac_sed_cmds="$ac_sed_cmds | sed -f conftest.s$ac_file"
+    fi
+    ac_file=`expr $ac_file + 1`
+    ac_beg=$ac_end
+    ac_end=`expr $ac_end + $ac_max_sed_cmds`
+  fi
+done
+if test -z "$ac_sed_cmds"; then
+  ac_sed_cmds=cat
+fi
+EOF
+
+cat >> $CONFIG_STATUS <<EOF
+
+CONFIG_FILES=\${CONFIG_FILES-"Makefile:makefile.cfg"}
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+for ac_file in .. $CONFIG_FILES; do if test "x$ac_file" != x..; then
+  # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+  case "$ac_file" in
+  *:*) ac_file_in=`echo "$ac_file"|sed 's%[^:]*:%%'`
+       ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+  *) ac_file_in="${ac_file}.in" ;;
+  esac
+
+  # Adjust a relative srcdir, top_srcdir, and INSTALL for subdirectories.
+
+  # Remove last slash and all that follows it.  Not all systems have dirname.
+  ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
+  if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then
+    # The file is in a subdirectory.
+    test ! -d "$ac_dir" && mkdir "$ac_dir"
+    ac_dir_suffix="/`echo $ac_dir|sed 's%^\./%%'`"
+    # A "../" for each directory in $ac_dir_suffix.
+    ac_dots=`echo $ac_dir_suffix|sed 's%/[^/]*%../%g'`
+  else
+    ac_dir_suffix= ac_dots=
+  fi
+
+  case "$ac_given_srcdir" in
+  .)  srcdir=.
+      if test -z "$ac_dots"; then top_srcdir=.
+      else top_srcdir=`echo $ac_dots|sed 's%/$%%'`; fi ;;
+  /*) srcdir="$ac_given_srcdir$ac_dir_suffix"; top_srcdir="$ac_given_srcdir" ;;
+  *) # Relative path.
+    srcdir="$ac_dots$ac_given_srcdir$ac_dir_suffix"
+    top_srcdir="$ac_dots$ac_given_srcdir" ;;
+  esac
+
+  case "$ac_given_INSTALL" in
+  [/$]*) INSTALL="$ac_given_INSTALL" ;;
+  *) INSTALL="$ac_dots$ac_given_INSTALL" ;;
+  esac
+
+  echo creating "$ac_file"
+  rm -f "$ac_file"
+  configure_input="Generated automatically from `echo $ac_file_in|sed 's%.*/%%'` by configure."
+  case "$ac_file" in
+  *Makefile*) ac_comsub="1i\\
+# $configure_input" ;;
+  *) ac_comsub= ;;
+  esac
+
+  ac_file_inputs=`echo $ac_file_in|sed -e "s%^%$ac_given_srcdir/%" -e "s%:% $ac_given_srcdir/%g"`
+  sed -e "$ac_comsub
+s%@configure_input@%$configure_input%g
+s%@srcdir@%$srcdir%g
+s%@top_srcdir@%$top_srcdir%g
+s%@INSTALL@%$INSTALL%g
+" $ac_file_inputs | (eval "$ac_sed_cmds") > $ac_file
+fi; done
+rm -f conftest.s*
+
+# These sed commands are passed to sed as "A NAME B NAME C VALUE D", where
+# NAME is the cpp macro being defined and VALUE is the value it is being given.
+#
+# ac_d sets the value in "#define NAME VALUE" lines.
+ac_dA='s%^\([ 	]*\)#\([ 	]*define[ 	][ 	]*\)'
+ac_dB='\([ 	][ 	]*\)[^ 	]*%\1#\2'
+ac_dC='\3'
+ac_dD='%g'
+# ac_u turns "#undef NAME" with trailing blanks into "#define NAME VALUE".
+ac_uA='s%^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
+ac_uB='\([ 	]\)%\1#\2define\3'
+ac_uC=' '
+ac_uD='\4%g'
+# ac_e turns "#undef NAME" without trailing blanks into "#define NAME VALUE".
+ac_eA='s%^\([ 	]*\)#\([ 	]*\)undef\([ 	][ 	]*\)'
+ac_eB='$%\1#\2define\3'
+ac_eC=' '
+ac_eD='%g'
+
+if test "${CONFIG_HEADERS+set}" != set; then
+EOF
+cat >> $CONFIG_STATUS <<EOF
+  CONFIG_HEADERS="jconfig.h:jconfig.cfg"
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+fi
+for ac_file in .. $CONFIG_HEADERS; do if test "x$ac_file" != x..; then
+  # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+  case "$ac_file" in
+  *:*) ac_file_in=`echo "$ac_file"|sed 's%[^:]*:%%'`
+       ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+  *) ac_file_in="${ac_file}.in" ;;
+  esac
+
+  echo creating $ac_file
+
+  rm -f conftest.frag conftest.in conftest.out
+  ac_file_inputs=`echo $ac_file_in|sed -e "s%^%$ac_given_srcdir/%" -e "s%:% $ac_given_srcdir/%g"`
+  cat $ac_file_inputs > conftest.in
+
+EOF
+
+# Transform confdefs.h into a sed script conftest.vals that substitutes
+# the proper values into config.h.in to produce config.h.  And first:
+# Protect against being on the right side of a sed subst in config.status.
+# Protect against being in an unquoted here document in config.status.
+rm -f conftest.vals
+cat > conftest.hdr <<\EOF
+s/[\\&%]/\\&/g
+s%[\\$`]%\\&%g
+s%#define \([A-Za-z_][A-Za-z0-9_]*\) *\(.*\)%${ac_dA}\1${ac_dB}\1${ac_dC}\2${ac_dD}%gp
+s%ac_d%ac_u%gp
+s%ac_u%ac_e%gp
+EOF
+sed -n -f conftest.hdr confdefs.h > conftest.vals
+rm -f conftest.hdr
+
+# This sed command replaces #undef with comments.  This is necessary, for
+# example, in the case of _POSIX_SOURCE, which is predefined and required
+# on some systems where configure will not decide to define it.
+cat >> conftest.vals <<\EOF
+EOF
+
+# Break up conftest.vals because some shells have a limit on
+# the size of here documents, and old seds have small limits too.
+
+rm -f conftest.tail
+while :
+do
+  ac_lines=`grep -c . conftest.vals`
+  # grep -c gives empty output for an empty file on some AIX systems.
+  if test -z "$ac_lines" || test "$ac_lines" -eq 0; then break; fi
+  # Write a limited-size here document to conftest.frag.
+  echo '  cat > conftest.frag <<CEOF' >> $CONFIG_STATUS
+  sed ${ac_max_here_lines}q conftest.vals >> $CONFIG_STATUS
+  echo 'CEOF
+  sed -f conftest.frag conftest.in > conftest.out
+  rm -f conftest.in
+  mv conftest.out conftest.in
+' >> $CONFIG_STATUS
+  sed 1,${ac_max_here_lines}d conftest.vals > conftest.tail
+  rm -f conftest.vals
+  mv conftest.tail conftest.vals
+done
+rm -f conftest.vals
+
+cat >> $CONFIG_STATUS <<\EOF
+  rm -f conftest.frag conftest.h
+  echo "/* $ac_file.  Generated automatically by configure.  */" > conftest.h
+  cat conftest.in >> conftest.h
+  rm -f conftest.in
+  if cmp -s $ac_file conftest.h 2>/dev/null; then
+    echo "$ac_file is unchanged"
+    rm -f conftest.h
+  else
+    # Remove last slash and all that follows it.  Not all systems have dirname.
+      ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
+      if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then
+      # The file is in a subdirectory.
+      test ! -d "$ac_dir" && mkdir "$ac_dir"
+    fi
+    rm -f $ac_file
+    mv conftest.h $ac_file
+  fi
+fi; done
+
+EOF
+cat >> $CONFIG_STATUS <<EOF
+
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+
+exit 0
+EOF
+chmod +x $CONFIG_STATUS
+rm -fr confdefs* $ac_clean_files
+test "$no_create" = yes || ${CONFIG_SHELL-/bin/sh} $CONFIG_STATUS || exit 1
+
diff --git a/common/jpeg/install-sh b/common/jpeg/install-sh
new file mode 100755
index 00000000..e8436696
--- /dev/null
+++ b/common/jpeg/install-sh
@@ -0,0 +1,250 @@
+#!/bin/sh
+#
+# install - install a program, script, or datafile
+# This comes from X11R5 (mit/util/scripts/install.sh).
+#
+# Copyright 1991 by the Massachusetts Institute of Technology
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation, and that the name of M.I.T. not be used in advertising or
+# publicity pertaining to distribution of the software without specific,
+# written prior permission.  M.I.T. makes no representations about the
+# suitability of this software for any purpose.  It is provided "as is"
+# without express or implied warranty.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# `make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.  It can only install one file at a time, a restriction
+# shared with many OS's install programs.
+
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit="${DOITPROG-}"
+
+
+# put in absolute paths if you don't have them in your path; or use env. vars.
+
+mvprog="${MVPROG-mv}"
+cpprog="${CPPROG-cp}"
+chmodprog="${CHMODPROG-chmod}"
+chownprog="${CHOWNPROG-chown}"
+chgrpprog="${CHGRPPROG-chgrp}"
+stripprog="${STRIPPROG-strip}"
+rmprog="${RMPROG-rm}"
+mkdirprog="${MKDIRPROG-mkdir}"
+
+transformbasename=""
+transform_arg=""
+instcmd="$mvprog"
+chmodcmd="$chmodprog 0755"
+chowncmd=""
+chgrpcmd=""
+stripcmd=""
+rmcmd="$rmprog -f"
+mvcmd="$mvprog"
+src=""
+dst=""
+dir_arg=""
+
+while [ x"$1" != x ]; do
+    case $1 in
+	-c) instcmd="$cpprog"
+	    shift
+	    continue;;
+
+	-d) dir_arg=true
+	    shift
+	    continue;;
+
+	-m) chmodcmd="$chmodprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-o) chowncmd="$chownprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-g) chgrpcmd="$chgrpprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-s) stripcmd="$stripprog"
+	    shift
+	    continue;;
+
+	-t=*) transformarg=`echo $1 | sed 's/-t=//'`
+	    shift
+	    continue;;
+
+	-b=*) transformbasename=`echo $1 | sed 's/-b=//'`
+	    shift
+	    continue;;
+
+	*)  if [ x"$src" = x ]
+	    then
+		src=$1
+	    else
+		# this colon is to work around a 386BSD /bin/sh bug
+		:
+		dst=$1
+	    fi
+	    shift
+	    continue;;
+    esac
+done
+
+if [ x"$src" = x ]
+then
+	echo "install:	no input file specified"
+	exit 1
+else
+	true
+fi
+
+if [ x"$dir_arg" != x ]; then
+	dst=$src
+	src=""
+	
+	if [ -d $dst ]; then
+		instcmd=:
+	else
+		instcmd=mkdir
+	fi
+else
+
+# Waiting for this to be detected by the "$instcmd $src $dsttmp" command
+# might cause directories to be created, which would be especially bad 
+# if $src (and thus $dsttmp) contains '*'.
+
+	if [ -f $src -o -d $src ]
+	then
+		true
+	else
+		echo "install:  $src does not exist"
+		exit 1
+	fi
+	
+	if [ x"$dst" = x ]
+	then
+		echo "install:	no destination specified"
+		exit 1
+	else
+		true
+	fi
+
+# If destination is a directory, append the input filename; if your system
+# does not like double slashes in filenames, you may need to add some logic
+
+	if [ -d $dst ]
+	then
+		dst="$dst"/`basename $src`
+	else
+		true
+	fi
+fi
+
+## this sed command emulates the dirname command
+dstdir=`echo $dst | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
+
+# Make sure that the destination directory exists.
+#  this part is taken from Noah Friedman's mkinstalldirs script
+
+# Skip lots of stat calls in the usual case.
+if [ ! -d "$dstdir" ]; then
+defaultIFS='	
+'
+IFS="${IFS-${defaultIFS}}"
+
+oIFS="${IFS}"
+# Some sh's can't handle IFS=/ for some reason.
+IFS='%'
+set - `echo ${dstdir} | sed -e 's@/@%@g' -e 's@^%@/@'`
+IFS="${oIFS}"
+
+pathcomp=''
+
+while [ $# -ne 0 ] ; do
+	pathcomp="${pathcomp}${1}"
+	shift
+
+	if [ ! -d "${pathcomp}" ] ;
+        then
+		$mkdirprog "${pathcomp}"
+	else
+		true
+	fi
+
+	pathcomp="${pathcomp}/"
+done
+fi
+
+if [ x"$dir_arg" != x ]
+then
+	$doit $instcmd $dst &&
+
+	if [ x"$chowncmd" != x ]; then $doit $chowncmd $dst; else true ; fi &&
+	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi &&
+	if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi &&
+	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi
+else
+
+# If we're going to rename the final executable, determine the name now.
+
+	if [ x"$transformarg" = x ] 
+	then
+		dstfile=`basename $dst`
+	else
+		dstfile=`basename $dst $transformbasename | 
+			sed $transformarg`$transformbasename
+	fi
+
+# don't allow the sed command to completely eliminate the filename
+
+	if [ x"$dstfile" = x ] 
+	then
+		dstfile=`basename $dst`
+	else
+		true
+	fi
+
+# Make a temp file name in the proper directory.
+
+	dsttmp=$dstdir/#inst.$$#
+
+# Move or copy the file name to the temp name
+
+	$doit $instcmd $src $dsttmp &&
+
+	trap "rm -f ${dsttmp}" 0 &&
+
+# and set any options; do chmod last to preserve setuid bits
+
+# If any of these fail, we abort the whole thing.  If we want to
+# ignore errors from any of these, just make sure not to ignore
+# errors from the above "$doit $instcmd $src $dsttmp" command.
+
+	if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi &&
+	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi &&
+	if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi &&
+	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi &&
+
+# Now rename the file to the real destination.
+
+	$doit $rmcmd -f $dstdir/$dstfile &&
+	$doit $mvcmd $dsttmp $dstdir/$dstfile 
+
+fi &&
+
+
+exit 0
diff --git a/common/jpeg/jcapimin.c b/common/jpeg/jcapimin.c
new file mode 100644
index 00000000..54fb8c58
--- /dev/null
+++ b/common/jpeg/jcapimin.c
@@ -0,0 +1,280 @@
+/*
+ * jcapimin.c
+ *
+ * Copyright (C) 1994-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains application interface code for the compression half
+ * of the JPEG library.  These are the "minimum" API routines that may be
+ * needed in either the normal full-compression case or the transcoding-only
+ * case.
+ *
+ * Most of the routines intended to be called directly by an application
+ * are in this file or in jcapistd.c.  But also see jcparam.c for
+ * parameter-setup helper routines, jcomapi.c for routines shared by
+ * compression and decompression, and jctrans.c for the transcoding case.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * Initialization of a JPEG compression object.
+ * The error manager must already be set up (in case memory manager fails).
+ */
+
+GLOBAL(void)
+jpeg_CreateCompress (j_compress_ptr cinfo, int version, size_t structsize)
+{
+  int i;
+
+  /* Guard against version mismatches between library and caller. */
+  cinfo->mem = NULL;		/* so jpeg_destroy knows mem mgr not called */
+  if (version != JPEG_LIB_VERSION)
+    ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
+  if (structsize != SIZEOF(struct jpeg_compress_struct))
+    ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE, 
+	     (int) SIZEOF(struct jpeg_compress_struct), (int) structsize);
+
+  /* For debugging purposes, we zero the whole master structure.
+   * But the application has already set the err pointer, and may have set
+   * client_data, so we have to save and restore those fields.
+   * Note: if application hasn't set client_data, tools like Purify may
+   * complain here.
+   */
+  {
+    struct jpeg_error_mgr * err = cinfo->err;
+    void * client_data = cinfo->client_data; /* ignore Purify complaint here */
+    MEMZERO(cinfo, SIZEOF(struct jpeg_compress_struct));
+    cinfo->err = err;
+    cinfo->client_data = client_data;
+  }
+  cinfo->is_decompressor = FALSE;
+
+  /* Initialize a memory manager instance for this object */
+  jinit_memory_mgr((j_common_ptr) cinfo);
+
+  /* Zero out pointers to permanent structures. */
+  cinfo->progress = NULL;
+  cinfo->dest = NULL;
+
+  cinfo->comp_info = NULL;
+
+  for (i = 0; i < NUM_QUANT_TBLS; i++)
+    cinfo->quant_tbl_ptrs[i] = NULL;
+
+  for (i = 0; i < NUM_HUFF_TBLS; i++) {
+    cinfo->dc_huff_tbl_ptrs[i] = NULL;
+    cinfo->ac_huff_tbl_ptrs[i] = NULL;
+  }
+
+  cinfo->script_space = NULL;
+
+  cinfo->input_gamma = 1.0;	/* in case application forgets */
+
+  /* OK, I'm ready */
+  cinfo->global_state = CSTATE_START;
+}
+
+
+/*
+ * Destruction of a JPEG compression object
+ */
+
+GLOBAL(void)
+jpeg_destroy_compress (j_compress_ptr cinfo)
+{
+  jpeg_destroy((j_common_ptr) cinfo); /* use common routine */
+}
+
+
+/*
+ * Abort processing of a JPEG compression operation,
+ * but don't destroy the object itself.
+ */
+
+GLOBAL(void)
+jpeg_abort_compress (j_compress_ptr cinfo)
+{
+  jpeg_abort((j_common_ptr) cinfo); /* use common routine */
+}
+
+
+/*
+ * Forcibly suppress or un-suppress all quantization and Huffman tables.
+ * Marks all currently defined tables as already written (if suppress)
+ * or not written (if !suppress).  This will control whether they get emitted
+ * by a subsequent jpeg_start_compress call.
+ *
+ * This routine is exported for use by applications that want to produce
+ * abbreviated JPEG datastreams.  It logically belongs in jcparam.c, but
+ * since it is called by jpeg_start_compress, we put it here --- otherwise
+ * jcparam.o would be linked whether the application used it or not.
+ */
+
+GLOBAL(void)
+jpeg_suppress_tables (j_compress_ptr cinfo, boolean suppress)
+{
+  int i;
+  JQUANT_TBL * qtbl;
+  JHUFF_TBL * htbl;
+
+  for (i = 0; i < NUM_QUANT_TBLS; i++) {
+    if ((qtbl = cinfo->quant_tbl_ptrs[i]) != NULL)
+      qtbl->sent_table = suppress;
+  }
+
+  for (i = 0; i < NUM_HUFF_TBLS; i++) {
+    if ((htbl = cinfo->dc_huff_tbl_ptrs[i]) != NULL)
+      htbl->sent_table = suppress;
+    if ((htbl = cinfo->ac_huff_tbl_ptrs[i]) != NULL)
+      htbl->sent_table = suppress;
+  }
+}
+
+
+/*
+ * Finish JPEG compression.
+ *
+ * If a multipass operating mode was selected, this may do a great deal of
+ * work including most of the actual output.
+ */
+
+GLOBAL(void)
+jpeg_finish_compress (j_compress_ptr cinfo)
+{
+  JDIMENSION iMCU_row;
+
+  if (cinfo->global_state == CSTATE_SCANNING ||
+      cinfo->global_state == CSTATE_RAW_OK) {
+    /* Terminate first pass */
+    if (cinfo->next_scanline < cinfo->image_height)
+      ERREXIT(cinfo, JERR_TOO_LITTLE_DATA);
+    (*cinfo->master->finish_pass) (cinfo);
+  } else if (cinfo->global_state != CSTATE_WRCOEFS)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  /* Perform any remaining passes */
+  while (! cinfo->master->is_last_pass) {
+    (*cinfo->master->prepare_for_pass) (cinfo);
+    for (iMCU_row = 0; iMCU_row < cinfo->total_iMCU_rows; iMCU_row++) {
+      if (cinfo->progress != NULL) {
+	cinfo->progress->pass_counter = (long) iMCU_row;
+	cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows;
+	(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+      }
+      /* We bypass the main controller and invoke coef controller directly;
+       * all work is being done from the coefficient buffer.
+       */
+      if (! (*cinfo->coef->compress_data) (cinfo, (JSAMPIMAGE) NULL))
+	ERREXIT(cinfo, JERR_CANT_SUSPEND);
+    }
+    (*cinfo->master->finish_pass) (cinfo);
+  }
+  /* Write EOI, do final cleanup */
+  (*cinfo->marker->write_file_trailer) (cinfo);
+  (*cinfo->dest->term_destination) (cinfo);
+  /* We can use jpeg_abort to release memory and reset global_state */
+  jpeg_abort((j_common_ptr) cinfo);
+}
+
+
+/*
+ * Write a special marker.
+ * This is only recommended for writing COM or APPn markers.
+ * Must be called after jpeg_start_compress() and before
+ * first call to jpeg_write_scanlines() or jpeg_write_raw_data().
+ */
+
+GLOBAL(void)
+jpeg_write_marker (j_compress_ptr cinfo, int marker,
+		   const JOCTET *dataptr, unsigned int datalen)
+{
+  JMETHOD(void, write_marker_byte, (j_compress_ptr info, int val));
+
+  if (cinfo->next_scanline != 0 ||
+      (cinfo->global_state != CSTATE_SCANNING &&
+       cinfo->global_state != CSTATE_RAW_OK &&
+       cinfo->global_state != CSTATE_WRCOEFS))
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  (*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
+  write_marker_byte = cinfo->marker->write_marker_byte;	/* copy for speed */
+  while (datalen--) {
+    (*write_marker_byte) (cinfo, *dataptr);
+    dataptr++;
+  }
+}
+
+/* Same, but piecemeal. */
+
+GLOBAL(void)
+jpeg_write_m_header (j_compress_ptr cinfo, int marker, unsigned int datalen)
+{
+  if (cinfo->next_scanline != 0 ||
+      (cinfo->global_state != CSTATE_SCANNING &&
+       cinfo->global_state != CSTATE_RAW_OK &&
+       cinfo->global_state != CSTATE_WRCOEFS))
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  (*cinfo->marker->write_marker_header) (cinfo, marker, datalen);
+}
+
+GLOBAL(void)
+jpeg_write_m_byte (j_compress_ptr cinfo, int val)
+{
+  (*cinfo->marker->write_marker_byte) (cinfo, val);
+}
+
+
+/*
+ * Alternate compression function: just write an abbreviated table file.
+ * Before calling this, all parameters and a data destination must be set up.
+ *
+ * To produce a pair of files containing abbreviated tables and abbreviated
+ * image data, one would proceed as follows:
+ *
+ *		initialize JPEG object
+ *		set JPEG parameters
+ *		set destination to table file
+ *		jpeg_write_tables(cinfo);
+ *		set destination to image file
+ *		jpeg_start_compress(cinfo, FALSE);
+ *		write data...
+ *		jpeg_finish_compress(cinfo);
+ *
+ * jpeg_write_tables has the side effect of marking all tables written
+ * (same as jpeg_suppress_tables(..., TRUE)).  Thus a subsequent start_compress
+ * will not re-emit the tables unless it is passed write_all_tables=TRUE.
+ */
+
+GLOBAL(void)
+jpeg_write_tables (j_compress_ptr cinfo)
+{
+  if (cinfo->global_state != CSTATE_START)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  /* (Re)initialize error mgr and destination modules */
+  (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
+  (*cinfo->dest->init_destination) (cinfo);
+  /* Initialize the marker writer ... bit of a crock to do it here. */
+  jinit_marker_writer(cinfo);
+  /* Write them tables! */
+  (*cinfo->marker->write_tables_only) (cinfo);
+  /* And clean up. */
+  (*cinfo->dest->term_destination) (cinfo);
+  /*
+   * In library releases up through v6a, we called jpeg_abort() here to free
+   * any working memory allocated by the destination manager and marker
+   * writer.  Some applications had a problem with that: they allocated space
+   * of their own from the library memory manager, and didn't want it to go
+   * away during write_tables.  So now we do nothing.  This will cause a
+   * memory leak if an app calls write_tables repeatedly without doing a full
+   * compression cycle or otherwise resetting the JPEG object.  However, that
+   * seems less bad than unexpectedly freeing memory in the normal case.
+   * An app that prefers the old behavior can call jpeg_abort for itself after
+   * each call to jpeg_write_tables().
+   */
+}
diff --git a/common/jpeg/jcapistd.c b/common/jpeg/jcapistd.c
new file mode 100644
index 00000000..c0320b1b
--- /dev/null
+++ b/common/jpeg/jcapistd.c
@@ -0,0 +1,161 @@
+/*
+ * jcapistd.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains application interface code for the compression half
+ * of the JPEG library.  These are the "standard" API routines that are
+ * used in the normal full-compression case.  They are not used by a
+ * transcoding-only application.  Note that if an application links in
+ * jpeg_start_compress, it will end up linking in the entire compressor.
+ * We thus must separate this file from jcapimin.c to avoid linking the
+ * whole compression library into a transcoder.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * Compression initialization.
+ * Before calling this, all parameters and a data destination must be set up.
+ *
+ * We require a write_all_tables parameter as a failsafe check when writing
+ * multiple datastreams from the same compression object.  Since prior runs
+ * will have left all the tables marked sent_table=TRUE, a subsequent run
+ * would emit an abbreviated stream (no tables) by default.  This may be what
+ * is wanted, but for safety's sake it should not be the default behavior:
+ * programmers should have to make a deliberate choice to emit abbreviated
+ * images.  Therefore the documentation and examples should encourage people
+ * to pass write_all_tables=TRUE; then it will take active thought to do the
+ * wrong thing.
+ */
+
+GLOBAL(void)
+jpeg_start_compress (j_compress_ptr cinfo, boolean write_all_tables)
+{
+  if (cinfo->global_state != CSTATE_START)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  if (write_all_tables)
+    jpeg_suppress_tables(cinfo, FALSE);	/* mark all tables to be written */
+
+  /* (Re)initialize error mgr and destination modules */
+  (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
+  (*cinfo->dest->init_destination) (cinfo);
+  /* Perform master selection of active modules */
+  jinit_compress_master(cinfo);
+  /* Set up for the first pass */
+  (*cinfo->master->prepare_for_pass) (cinfo);
+  /* Ready for application to drive first pass through jpeg_write_scanlines
+   * or jpeg_write_raw_data.
+   */
+  cinfo->next_scanline = 0;
+  cinfo->global_state = (cinfo->raw_data_in ? CSTATE_RAW_OK : CSTATE_SCANNING);
+}
+
+
+/*
+ * Write some scanlines of data to the JPEG compressor.
+ *
+ * The return value will be the number of lines actually written.
+ * This should be less than the supplied num_lines only in case that
+ * the data destination module has requested suspension of the compressor,
+ * or if more than image_height scanlines are passed in.
+ *
+ * Note: we warn about excess calls to jpeg_write_scanlines() since
+ * this likely signals an application programmer error.  However,
+ * excess scanlines passed in the last valid call are *silently* ignored,
+ * so that the application need not adjust num_lines for end-of-image
+ * when using a multiple-scanline buffer.
+ */
+
+GLOBAL(JDIMENSION)
+jpeg_write_scanlines (j_compress_ptr cinfo, JSAMPARRAY scanlines,
+		      JDIMENSION num_lines)
+{
+  JDIMENSION row_ctr, rows_left;
+
+  if (cinfo->global_state != CSTATE_SCANNING)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  if (cinfo->next_scanline >= cinfo->image_height)
+    WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
+
+  /* Call progress monitor hook if present */
+  if (cinfo->progress != NULL) {
+    cinfo->progress->pass_counter = (long) cinfo->next_scanline;
+    cinfo->progress->pass_limit = (long) cinfo->image_height;
+    (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+  }
+
+  /* Give master control module another chance if this is first call to
+   * jpeg_write_scanlines.  This lets output of the frame/scan headers be
+   * delayed so that application can write COM, etc, markers between
+   * jpeg_start_compress and jpeg_write_scanlines.
+   */
+  if (cinfo->master->call_pass_startup)
+    (*cinfo->master->pass_startup) (cinfo);
+
+  /* Ignore any extra scanlines at bottom of image. */
+  rows_left = cinfo->image_height - cinfo->next_scanline;
+  if (num_lines > rows_left)
+    num_lines = rows_left;
+
+  row_ctr = 0;
+  (*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, num_lines);
+  cinfo->next_scanline += row_ctr;
+  return row_ctr;
+}
+
+
+/*
+ * Alternate entry point to write raw data.
+ * Processes exactly one iMCU row per call, unless suspended.
+ */
+
+GLOBAL(JDIMENSION)
+jpeg_write_raw_data (j_compress_ptr cinfo, JSAMPIMAGE data,
+		     JDIMENSION num_lines)
+{
+  JDIMENSION lines_per_iMCU_row;
+
+  if (cinfo->global_state != CSTATE_RAW_OK)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  if (cinfo->next_scanline >= cinfo->image_height) {
+    WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
+    return 0;
+  }
+
+  /* Call progress monitor hook if present */
+  if (cinfo->progress != NULL) {
+    cinfo->progress->pass_counter = (long) cinfo->next_scanline;
+    cinfo->progress->pass_limit = (long) cinfo->image_height;
+    (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+  }
+
+  /* Give master control module another chance if this is first call to
+   * jpeg_write_raw_data.  This lets output of the frame/scan headers be
+   * delayed so that application can write COM, etc, markers between
+   * jpeg_start_compress and jpeg_write_raw_data.
+   */
+  if (cinfo->master->call_pass_startup)
+    (*cinfo->master->pass_startup) (cinfo);
+
+  /* Verify that at least one iMCU row has been passed. */
+  lines_per_iMCU_row = cinfo->max_v_samp_factor * DCTSIZE;
+  if (num_lines < lines_per_iMCU_row)
+    ERREXIT(cinfo, JERR_BUFFER_SIZE);
+
+  /* Directly compress the row. */
+  if (! (*cinfo->coef->compress_data) (cinfo, data)) {
+    /* If compressor did not consume the whole row, suspend processing. */
+    return 0;
+  }
+
+  /* OK, we processed one iMCU row. */
+  cinfo->next_scanline += lines_per_iMCU_row;
+  return lines_per_iMCU_row;
+}
diff --git a/common/jpeg/jccoefct.c b/common/jpeg/jccoefct.c
new file mode 100644
index 00000000..1963ddb6
--- /dev/null
+++ b/common/jpeg/jccoefct.c
@@ -0,0 +1,449 @@
+/*
+ * jccoefct.c
+ *
+ * Copyright (C) 1994-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the coefficient buffer controller for compression.
+ * This controller is the top level of the JPEG compressor proper.
+ * The coefficient buffer lies between forward-DCT and entropy encoding steps.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* We use a full-image coefficient buffer when doing Huffman optimization,
+ * and also for writing multiple-scan JPEG files.  In all cases, the DCT
+ * step is run during the first pass, and subsequent passes need only read
+ * the buffered coefficients.
+ */
+#ifdef ENTROPY_OPT_SUPPORTED
+#define FULL_COEF_BUFFER_SUPPORTED
+#else
+#ifdef C_MULTISCAN_FILES_SUPPORTED
+#define FULL_COEF_BUFFER_SUPPORTED
+#endif
+#endif
+
+
+/* Private buffer controller object */
+
+typedef struct {
+  struct jpeg_c_coef_controller pub; /* public fields */
+
+  JDIMENSION iMCU_row_num;	/* iMCU row # within image */
+  JDIMENSION mcu_ctr;		/* counts MCUs processed in current row */
+  int MCU_vert_offset;		/* counts MCU rows within iMCU row */
+  int MCU_rows_per_iMCU_row;	/* number of such rows needed */
+
+  /* For single-pass compression, it's sufficient to buffer just one MCU
+   * (although this may prove a bit slow in practice).  We allocate a
+   * workspace of C_MAX_BLOCKS_IN_MCU coefficient blocks, and reuse it for each
+   * MCU constructed and sent.  (On 80x86, the workspace is FAR even though
+   * it's not really very big; this is to keep the module interfaces unchanged
+   * when a large coefficient buffer is necessary.)
+   * In multi-pass modes, this array points to the current MCU's blocks
+   * within the virtual arrays.
+   */
+  JBLOCKROW MCU_buffer[C_MAX_BLOCKS_IN_MCU];
+
+  /* In multi-pass modes, we need a virtual block array for each component. */
+  jvirt_barray_ptr whole_image[MAX_COMPONENTS];
+} my_coef_controller;
+
+typedef my_coef_controller * my_coef_ptr;
+
+
+/* Forward declarations */
+METHODDEF(boolean) compress_data
+    JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
+#ifdef FULL_COEF_BUFFER_SUPPORTED
+METHODDEF(boolean) compress_first_pass
+    JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
+METHODDEF(boolean) compress_output
+    JPP((j_compress_ptr cinfo, JSAMPIMAGE input_buf));
+#endif
+
+
+LOCAL(void)
+start_iMCU_row (j_compress_ptr cinfo)
+/* Reset within-iMCU-row counters for a new row */
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+
+  /* In an interleaved scan, an MCU row is the same as an iMCU row.
+   * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
+   * But at the bottom of the image, process only what's left.
+   */
+  if (cinfo->comps_in_scan > 1) {
+    coef->MCU_rows_per_iMCU_row = 1;
+  } else {
+    if (coef->iMCU_row_num < (cinfo->total_iMCU_rows-1))
+      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
+    else
+      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
+  }
+
+  coef->mcu_ctr = 0;
+  coef->MCU_vert_offset = 0;
+}
+
+
+/*
+ * Initialize for a processing pass.
+ */
+
+METHODDEF(void)
+start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+
+  coef->iMCU_row_num = 0;
+  start_iMCU_row(cinfo);
+
+  switch (pass_mode) {
+  case JBUF_PASS_THRU:
+    if (coef->whole_image[0] != NULL)
+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    coef->pub.compress_data = compress_data;
+    break;
+#ifdef FULL_COEF_BUFFER_SUPPORTED
+  case JBUF_SAVE_AND_PASS:
+    if (coef->whole_image[0] == NULL)
+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    coef->pub.compress_data = compress_first_pass;
+    break;
+  case JBUF_CRANK_DEST:
+    if (coef->whole_image[0] == NULL)
+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    coef->pub.compress_data = compress_output;
+    break;
+#endif
+  default:
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    break;
+  }
+}
+
+
+/*
+ * Process some data in the single-pass case.
+ * We process the equivalent of one fully interleaved MCU row ("iMCU" row)
+ * per call, ie, v_samp_factor block rows for each component in the image.
+ * Returns TRUE if the iMCU row is completed, FALSE if suspended.
+ *
+ * NB: input_buf contains a plane for each component in image,
+ * which we index according to the component's SOF position.
+ */
+
+METHODDEF(boolean)
+compress_data (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  JDIMENSION MCU_col_num;	/* index of current MCU within row */
+  JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1;
+  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
+  int blkn, bi, ci, yindex, yoffset, blockcnt;
+  JDIMENSION ypos, xpos;
+  jpeg_component_info *compptr;
+
+  /* Loop to write as much as one whole iMCU row */
+  for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
+       yoffset++) {
+    for (MCU_col_num = coef->mcu_ctr; MCU_col_num <= last_MCU_col;
+	 MCU_col_num++) {
+      /* Determine where data comes from in input_buf and do the DCT thing.
+       * Each call on forward_DCT processes a horizontal row of DCT blocks
+       * as wide as an MCU; we rely on having allocated the MCU_buffer[] blocks
+       * sequentially.  Dummy blocks at the right or bottom edge are filled in
+       * specially.  The data in them does not matter for image reconstruction,
+       * so we fill them with values that will encode to the smallest amount of
+       * data, viz: all zeroes in the AC entries, DC entries equal to previous
+       * block's DC value.  (Thanks to Thomas Kinsman for this idea.)
+       */
+      blkn = 0;
+      for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+	compptr = cinfo->cur_comp_info[ci];
+	blockcnt = (MCU_col_num < last_MCU_col) ? compptr->MCU_width
+						: compptr->last_col_width;
+	xpos = MCU_col_num * compptr->MCU_sample_width;
+	ypos = yoffset * DCTSIZE; /* ypos == (yoffset+yindex) * DCTSIZE */
+	for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
+	  if (coef->iMCU_row_num < last_iMCU_row ||
+	      yoffset+yindex < compptr->last_row_height) {
+	    (*cinfo->fdct->forward_DCT) (cinfo, compptr,
+					 input_buf[compptr->component_index],
+					 coef->MCU_buffer[blkn],
+					 ypos, xpos, (JDIMENSION) blockcnt);
+	    if (blockcnt < compptr->MCU_width) {
+	      /* Create some dummy blocks at the right edge of the image. */
+	      jzero_far((void FAR *) coef->MCU_buffer[blkn + blockcnt],
+			(compptr->MCU_width - blockcnt) * SIZEOF(JBLOCK));
+	      for (bi = blockcnt; bi < compptr->MCU_width; bi++) {
+		coef->MCU_buffer[blkn+bi][0][0] = coef->MCU_buffer[blkn+bi-1][0][0];
+	      }
+	    }
+	  } else {
+	    /* Create a row of dummy blocks at the bottom of the image. */
+	    jzero_far((void FAR *) coef->MCU_buffer[blkn],
+		      compptr->MCU_width * SIZEOF(JBLOCK));
+	    for (bi = 0; bi < compptr->MCU_width; bi++) {
+	      coef->MCU_buffer[blkn+bi][0][0] = coef->MCU_buffer[blkn-1][0][0];
+	    }
+	  }
+	  blkn += compptr->MCU_width;
+	  ypos += DCTSIZE;
+	}
+      }
+      /* Try to write the MCU.  In event of a suspension failure, we will
+       * re-DCT the MCU on restart (a bit inefficient, could be fixed...)
+       */
+      if (! (*cinfo->entropy->encode_mcu) (cinfo, coef->MCU_buffer)) {
+	/* Suspension forced; update state counters and exit */
+	coef->MCU_vert_offset = yoffset;
+	coef->mcu_ctr = MCU_col_num;
+	return FALSE;
+      }
+    }
+    /* Completed an MCU row, but perhaps not an iMCU row */
+    coef->mcu_ctr = 0;
+  }
+  /* Completed the iMCU row, advance counters for next one */
+  coef->iMCU_row_num++;
+  start_iMCU_row(cinfo);
+  return TRUE;
+}
+
+
+#ifdef FULL_COEF_BUFFER_SUPPORTED
+
+/*
+ * Process some data in the first pass of a multi-pass case.
+ * We process the equivalent of one fully interleaved MCU row ("iMCU" row)
+ * per call, ie, v_samp_factor block rows for each component in the image.
+ * This amount of data is read from the source buffer, DCT'd and quantized,
+ * and saved into the virtual arrays.  We also generate suitable dummy blocks
+ * as needed at the right and lower edges.  (The dummy blocks are constructed
+ * in the virtual arrays, which have been padded appropriately.)  This makes
+ * it possible for subsequent passes not to worry about real vs. dummy blocks.
+ *
+ * We must also emit the data to the entropy encoder.  This is conveniently
+ * done by calling compress_output() after we've loaded the current strip
+ * of the virtual arrays.
+ *
+ * NB: input_buf contains a plane for each component in image.  All
+ * components are DCT'd and loaded into the virtual arrays in this pass.
+ * However, it may be that only a subset of the components are emitted to
+ * the entropy encoder during this first pass; be careful about looking
+ * at the scan-dependent variables (MCU dimensions, etc).
+ */
+
+METHODDEF(boolean)
+compress_first_pass (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
+  JDIMENSION blocks_across, MCUs_across, MCUindex;
+  int bi, ci, h_samp_factor, block_row, block_rows, ndummy;
+  JCOEF lastDC;
+  jpeg_component_info *compptr;
+  JBLOCKARRAY buffer;
+  JBLOCKROW thisblockrow, lastblockrow;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Align the virtual buffer for this component. */
+    buffer = (*cinfo->mem->access_virt_barray)
+      ((j_common_ptr) cinfo, coef->whole_image[ci],
+       coef->iMCU_row_num * compptr->v_samp_factor,
+       (JDIMENSION) compptr->v_samp_factor, TRUE);
+    /* Count non-dummy DCT block rows in this iMCU row. */
+    if (coef->iMCU_row_num < last_iMCU_row)
+      block_rows = compptr->v_samp_factor;
+    else {
+      /* NB: can't use last_row_height here, since may not be set! */
+      block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
+      if (block_rows == 0) block_rows = compptr->v_samp_factor;
+    }
+    blocks_across = compptr->width_in_blocks;
+    h_samp_factor = compptr->h_samp_factor;
+    /* Count number of dummy blocks to be added at the right margin. */
+    ndummy = (int) (blocks_across % h_samp_factor);
+    if (ndummy > 0)
+      ndummy = h_samp_factor - ndummy;
+    /* Perform DCT for all non-dummy blocks in this iMCU row.  Each call
+     * on forward_DCT processes a complete horizontal row of DCT blocks.
+     */
+    for (block_row = 0; block_row < block_rows; block_row++) {
+      thisblockrow = buffer[block_row];
+      (*cinfo->fdct->forward_DCT) (cinfo, compptr,
+				   input_buf[ci], thisblockrow,
+				   (JDIMENSION) (block_row * DCTSIZE),
+				   (JDIMENSION) 0, blocks_across);
+      if (ndummy > 0) {
+	/* Create dummy blocks at the right edge of the image. */
+	thisblockrow += blocks_across; /* => first dummy block */
+	jzero_far((void FAR *) thisblockrow, ndummy * SIZEOF(JBLOCK));
+	lastDC = thisblockrow[-1][0];
+	for (bi = 0; bi < ndummy; bi++) {
+	  thisblockrow[bi][0] = lastDC;
+	}
+      }
+    }
+    /* If at end of image, create dummy block rows as needed.
+     * The tricky part here is that within each MCU, we want the DC values
+     * of the dummy blocks to match the last real block's DC value.
+     * This squeezes a few more bytes out of the resulting file...
+     */
+    if (coef->iMCU_row_num == last_iMCU_row) {
+      blocks_across += ndummy;	/* include lower right corner */
+      MCUs_across = blocks_across / h_samp_factor;
+      for (block_row = block_rows; block_row < compptr->v_samp_factor;
+	   block_row++) {
+	thisblockrow = buffer[block_row];
+	lastblockrow = buffer[block_row-1];
+	jzero_far((void FAR *) thisblockrow,
+		  (size_t) (blocks_across * SIZEOF(JBLOCK)));
+	for (MCUindex = 0; MCUindex < MCUs_across; MCUindex++) {
+	  lastDC = lastblockrow[h_samp_factor-1][0];
+	  for (bi = 0; bi < h_samp_factor; bi++) {
+	    thisblockrow[bi][0] = lastDC;
+	  }
+	  thisblockrow += h_samp_factor; /* advance to next MCU in row */
+	  lastblockrow += h_samp_factor;
+	}
+      }
+    }
+  }
+  /* NB: compress_output will increment iMCU_row_num if successful.
+   * A suspension return will result in redoing all the work above next time.
+   */
+
+  /* Emit data to the entropy encoder, sharing code with subsequent passes */
+  return compress_output(cinfo, input_buf);
+}
+
+
+/*
+ * Process some data in subsequent passes of a multi-pass case.
+ * We process the equivalent of one fully interleaved MCU row ("iMCU" row)
+ * per call, ie, v_samp_factor block rows for each component in the scan.
+ * The data is obtained from the virtual arrays and fed to the entropy coder.
+ * Returns TRUE if the iMCU row is completed, FALSE if suspended.
+ *
+ * NB: input_buf is ignored; it is likely to be a NULL pointer.
+ */
+
+METHODDEF(boolean)
+compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  JDIMENSION MCU_col_num;	/* index of current MCU within row */
+  int blkn, ci, xindex, yindex, yoffset;
+  JDIMENSION start_col;
+  JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN];
+  JBLOCKROW buffer_ptr;
+  jpeg_component_info *compptr;
+
+  /* Align the virtual buffers for the components used in this scan.
+   * NB: during first pass, this is safe only because the buffers will
+   * already be aligned properly, so jmemmgr.c won't need to do any I/O.
+   */
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    buffer[ci] = (*cinfo->mem->access_virt_barray)
+      ((j_common_ptr) cinfo, coef->whole_image[compptr->component_index],
+       coef->iMCU_row_num * compptr->v_samp_factor,
+       (JDIMENSION) compptr->v_samp_factor, FALSE);
+  }
+
+  /* Loop to process one whole iMCU row */
+  for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
+       yoffset++) {
+    for (MCU_col_num = coef->mcu_ctr; MCU_col_num < cinfo->MCUs_per_row;
+	 MCU_col_num++) {
+      /* Construct list of pointers to DCT blocks belonging to this MCU */
+      blkn = 0;			/* index of current DCT block within MCU */
+      for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+	compptr = cinfo->cur_comp_info[ci];
+	start_col = MCU_col_num * compptr->MCU_width;
+	for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
+	  buffer_ptr = buffer[ci][yindex+yoffset] + start_col;
+	  for (xindex = 0; xindex < compptr->MCU_width; xindex++) {
+	    coef->MCU_buffer[blkn++] = buffer_ptr++;
+	  }
+	}
+      }
+      /* Try to write the MCU. */
+      if (! (*cinfo->entropy->encode_mcu) (cinfo, coef->MCU_buffer)) {
+	/* Suspension forced; update state counters and exit */
+	coef->MCU_vert_offset = yoffset;
+	coef->mcu_ctr = MCU_col_num;
+	return FALSE;
+      }
+    }
+    /* Completed an MCU row, but perhaps not an iMCU row */
+    coef->mcu_ctr = 0;
+  }
+  /* Completed the iMCU row, advance counters for next one */
+  coef->iMCU_row_num++;
+  start_iMCU_row(cinfo);
+  return TRUE;
+}
+
+#endif /* FULL_COEF_BUFFER_SUPPORTED */
+
+
+/*
+ * Initialize coefficient buffer controller.
+ */
+
+GLOBAL(void)
+jinit_c_coef_controller (j_compress_ptr cinfo, boolean need_full_buffer)
+{
+  my_coef_ptr coef;
+
+  coef = (my_coef_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_coef_controller));
+  cinfo->coef = (struct jpeg_c_coef_controller *) coef;
+  coef->pub.start_pass = start_pass_coef;
+
+  /* Create the coefficient buffer. */
+  if (need_full_buffer) {
+#ifdef FULL_COEF_BUFFER_SUPPORTED
+    /* Allocate a full-image virtual array for each component, */
+    /* padded to a multiple of samp_factor DCT blocks in each direction. */
+    int ci;
+    jpeg_component_info *compptr;
+
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	 ci++, compptr++) {
+      coef->whole_image[ci] = (*cinfo->mem->request_virt_barray)
+	((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
+	 (JDIMENSION) jround_up((long) compptr->width_in_blocks,
+				(long) compptr->h_samp_factor),
+	 (JDIMENSION) jround_up((long) compptr->height_in_blocks,
+				(long) compptr->v_samp_factor),
+	 (JDIMENSION) compptr->v_samp_factor);
+    }
+#else
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+#endif
+  } else {
+    /* We only need a single-MCU buffer. */
+    JBLOCKROW buffer;
+    int i;
+
+    buffer = (JBLOCKROW)
+      (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
+    for (i = 0; i < C_MAX_BLOCKS_IN_MCU; i++) {
+      coef->MCU_buffer[i] = buffer + i;
+    }
+    coef->whole_image[0] = NULL; /* flag for no virtual arrays */
+  }
+}
diff --git a/common/jpeg/jccolor.c b/common/jpeg/jccolor.c
new file mode 100644
index 00000000..0a8a4b5d
--- /dev/null
+++ b/common/jpeg/jccolor.c
@@ -0,0 +1,459 @@
+/*
+ * jccolor.c
+ *
+ * Copyright (C) 1991-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains input colorspace conversion routines.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Private subobject */
+
+typedef struct {
+  struct jpeg_color_converter pub; /* public fields */
+
+  /* Private state for RGB->YCC conversion */
+  INT32 * rgb_ycc_tab;		/* => table for RGB to YCbCr conversion */
+} my_color_converter;
+
+typedef my_color_converter * my_cconvert_ptr;
+
+
+/**************** RGB -> YCbCr conversion: most common case **************/
+
+/*
+ * YCbCr is defined per CCIR 601-1, except that Cb and Cr are
+ * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5.
+ * The conversion equations to be implemented are therefore
+ *	Y  =  0.29900 * R + 0.58700 * G + 0.11400 * B
+ *	Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B  + CENTERJSAMPLE
+ *	Cr =  0.50000 * R - 0.41869 * G - 0.08131 * B  + CENTERJSAMPLE
+ * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.)
+ * Note: older versions of the IJG code used a zero offset of MAXJSAMPLE/2,
+ * rather than CENTERJSAMPLE, for Cb and Cr.  This gave equal positive and
+ * negative swings for Cb/Cr, but meant that grayscale values (Cb=Cr=0)
+ * were not represented exactly.  Now we sacrifice exact representation of
+ * maximum red and maximum blue in order to get exact grayscales.
+ *
+ * To avoid floating-point arithmetic, we represent the fractional constants
+ * as integers scaled up by 2^16 (about 4 digits precision); we have to divide
+ * the products by 2^16, with appropriate rounding, to get the correct answer.
+ *
+ * For even more speed, we avoid doing any multiplications in the inner loop
+ * by precalculating the constants times R,G,B for all possible values.
+ * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table);
+ * for 12-bit samples it is still acceptable.  It's not very reasonable for
+ * 16-bit samples, but if you want lossless storage you shouldn't be changing
+ * colorspace anyway.
+ * The CENTERJSAMPLE offsets and the rounding fudge-factor of 0.5 are included
+ * in the tables to save adding them separately in the inner loop.
+ */
+
+#define SCALEBITS	16	/* speediest right-shift on some machines */
+#define CBCR_OFFSET	((INT32) CENTERJSAMPLE << SCALEBITS)
+#define ONE_HALF	((INT32) 1 << (SCALEBITS-1))
+#define FIX(x)		((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
+
+/* We allocate one big table and divide it up into eight parts, instead of
+ * doing eight alloc_small requests.  This lets us use a single table base
+ * address, which can be held in a register in the inner loops on many
+ * machines (more than can hold all eight addresses, anyway).
+ */
+
+#define R_Y_OFF		0			/* offset to R => Y section */
+#define G_Y_OFF		(1*(MAXJSAMPLE+1))	/* offset to G => Y section */
+#define B_Y_OFF		(2*(MAXJSAMPLE+1))	/* etc. */
+#define R_CB_OFF	(3*(MAXJSAMPLE+1))
+#define G_CB_OFF	(4*(MAXJSAMPLE+1))
+#define B_CB_OFF	(5*(MAXJSAMPLE+1))
+#define R_CR_OFF	B_CB_OFF		/* B=>Cb, R=>Cr are the same */
+#define G_CR_OFF	(6*(MAXJSAMPLE+1))
+#define B_CR_OFF	(7*(MAXJSAMPLE+1))
+#define TABLE_SIZE	(8*(MAXJSAMPLE+1))
+
+
+/*
+ * Initialize for RGB->YCC colorspace conversion.
+ */
+
+METHODDEF(void)
+rgb_ycc_start (j_compress_ptr cinfo)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  INT32 * rgb_ycc_tab;
+  INT32 i;
+
+  /* Allocate and fill in the conversion tables. */
+  cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(TABLE_SIZE * SIZEOF(INT32)));
+
+  for (i = 0; i <= MAXJSAMPLE; i++) {
+    rgb_ycc_tab[i+R_Y_OFF] = FIX(0.29900) * i;
+    rgb_ycc_tab[i+G_Y_OFF] = FIX(0.58700) * i;
+    rgb_ycc_tab[i+B_Y_OFF] = FIX(0.11400) * i     + ONE_HALF;
+    rgb_ycc_tab[i+R_CB_OFF] = (-FIX(0.16874)) * i;
+    rgb_ycc_tab[i+G_CB_OFF] = (-FIX(0.33126)) * i;
+    /* We use a rounding fudge-factor of 0.5-epsilon for Cb and Cr.
+     * This ensures that the maximum output will round to MAXJSAMPLE
+     * not MAXJSAMPLE+1, and thus that we don't have to range-limit.
+     */
+    rgb_ycc_tab[i+B_CB_OFF] = FIX(0.50000) * i    + CBCR_OFFSET + ONE_HALF-1;
+/*  B=>Cb and R=>Cr tables are the same
+    rgb_ycc_tab[i+R_CR_OFF] = FIX(0.50000) * i    + CBCR_OFFSET + ONE_HALF-1;
+*/
+    rgb_ycc_tab[i+G_CR_OFF] = (-FIX(0.41869)) * i;
+    rgb_ycc_tab[i+B_CR_OFF] = (-FIX(0.08131)) * i;
+  }
+}
+
+
+/*
+ * Convert some rows of samples to the JPEG colorspace.
+ *
+ * Note that we change from the application's interleaved-pixel format
+ * to our internal noninterleaved, one-plane-per-component format.
+ * The input buffer is therefore three times as wide as the output buffer.
+ *
+ * A starting row offset is provided only for the output buffer.  The caller
+ * can easily adjust the passed input_buf value to accommodate any row
+ * offset required on that side.
+ */
+
+METHODDEF(void)
+rgb_ycc_convert (j_compress_ptr cinfo,
+		 JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+		 JDIMENSION output_row, int num_rows)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  register int r, g, b;
+  register INT32 * ctab = cconvert->rgb_ycc_tab;
+  register JSAMPROW inptr;
+  register JSAMPROW outptr0, outptr1, outptr2;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->image_width;
+
+  while (--num_rows >= 0) {
+    inptr = *input_buf++;
+    outptr0 = output_buf[0][output_row];
+    outptr1 = output_buf[1][output_row];
+    outptr2 = output_buf[2][output_row];
+    output_row++;
+    for (col = 0; col < num_cols; col++) {
+      r = GETJSAMPLE(inptr[RGB_RED]);
+      g = GETJSAMPLE(inptr[RGB_GREEN]);
+      b = GETJSAMPLE(inptr[RGB_BLUE]);
+      inptr += RGB_PIXELSIZE;
+      /* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
+       * must be too; we do not need an explicit range-limiting operation.
+       * Hence the value being shifted is never negative, and we don't
+       * need the general RIGHT_SHIFT macro.
+       */
+      /* Y */
+      outptr0[col] = (JSAMPLE)
+		((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
+		 >> SCALEBITS);
+      /* Cb */
+      outptr1[col] = (JSAMPLE)
+		((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF])
+		 >> SCALEBITS);
+      /* Cr */
+      outptr2[col] = (JSAMPLE)
+		((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF])
+		 >> SCALEBITS);
+    }
+  }
+}
+
+
+/**************** Cases other than RGB -> YCbCr **************/
+
+
+/*
+ * Convert some rows of samples to the JPEG colorspace.
+ * This version handles RGB->grayscale conversion, which is the same
+ * as the RGB->Y portion of RGB->YCbCr.
+ * We assume rgb_ycc_start has been called (we only use the Y tables).
+ */
+
+METHODDEF(void)
+rgb_gray_convert (j_compress_ptr cinfo,
+		  JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+		  JDIMENSION output_row, int num_rows)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  register int r, g, b;
+  register INT32 * ctab = cconvert->rgb_ycc_tab;
+  register JSAMPROW inptr;
+  register JSAMPROW outptr;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->image_width;
+
+  while (--num_rows >= 0) {
+    inptr = *input_buf++;
+    outptr = output_buf[0][output_row];
+    output_row++;
+    for (col = 0; col < num_cols; col++) {
+      r = GETJSAMPLE(inptr[RGB_RED]);
+      g = GETJSAMPLE(inptr[RGB_GREEN]);
+      b = GETJSAMPLE(inptr[RGB_BLUE]);
+      inptr += RGB_PIXELSIZE;
+      /* Y */
+      outptr[col] = (JSAMPLE)
+		((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
+		 >> SCALEBITS);
+    }
+  }
+}
+
+
+/*
+ * Convert some rows of samples to the JPEG colorspace.
+ * This version handles Adobe-style CMYK->YCCK conversion,
+ * where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the same
+ * conversion as above, while passing K (black) unchanged.
+ * We assume rgb_ycc_start has been called.
+ */
+
+METHODDEF(void)
+cmyk_ycck_convert (j_compress_ptr cinfo,
+		   JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+		   JDIMENSION output_row, int num_rows)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  register int r, g, b;
+  register INT32 * ctab = cconvert->rgb_ycc_tab;
+  register JSAMPROW inptr;
+  register JSAMPROW outptr0, outptr1, outptr2, outptr3;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->image_width;
+
+  while (--num_rows >= 0) {
+    inptr = *input_buf++;
+    outptr0 = output_buf[0][output_row];
+    outptr1 = output_buf[1][output_row];
+    outptr2 = output_buf[2][output_row];
+    outptr3 = output_buf[3][output_row];
+    output_row++;
+    for (col = 0; col < num_cols; col++) {
+      r = MAXJSAMPLE - GETJSAMPLE(inptr[0]);
+      g = MAXJSAMPLE - GETJSAMPLE(inptr[1]);
+      b = MAXJSAMPLE - GETJSAMPLE(inptr[2]);
+      /* K passes through as-is */
+      outptr3[col] = inptr[3];	/* don't need GETJSAMPLE here */
+      inptr += 4;
+      /* If the inputs are 0..MAXJSAMPLE, the outputs of these equations
+       * must be too; we do not need an explicit range-limiting operation.
+       * Hence the value being shifted is never negative, and we don't
+       * need the general RIGHT_SHIFT macro.
+       */
+      /* Y */
+      outptr0[col] = (JSAMPLE)
+		((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF])
+		 >> SCALEBITS);
+      /* Cb */
+      outptr1[col] = (JSAMPLE)
+		((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF])
+		 >> SCALEBITS);
+      /* Cr */
+      outptr2[col] = (JSAMPLE)
+		((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF])
+		 >> SCALEBITS);
+    }
+  }
+}
+
+
+/*
+ * Convert some rows of samples to the JPEG colorspace.
+ * This version handles grayscale output with no conversion.
+ * The source can be either plain grayscale or YCbCr (since Y == gray).
+ */
+
+METHODDEF(void)
+grayscale_convert (j_compress_ptr cinfo,
+		   JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+		   JDIMENSION output_row, int num_rows)
+{
+  register JSAMPROW inptr;
+  register JSAMPROW outptr;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->image_width;
+  int instride = cinfo->input_components;
+
+  while (--num_rows >= 0) {
+    inptr = *input_buf++;
+    outptr = output_buf[0][output_row];
+    output_row++;
+    for (col = 0; col < num_cols; col++) {
+      outptr[col] = inptr[0];	/* don't need GETJSAMPLE() here */
+      inptr += instride;
+    }
+  }
+}
+
+
+/*
+ * Convert some rows of samples to the JPEG colorspace.
+ * This version handles multi-component colorspaces without conversion.
+ * We assume input_components == num_components.
+ */
+
+METHODDEF(void)
+null_convert (j_compress_ptr cinfo,
+	      JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+	      JDIMENSION output_row, int num_rows)
+{
+  register JSAMPROW inptr;
+  register JSAMPROW outptr;
+  register JDIMENSION col;
+  register int ci;
+  int nc = cinfo->num_components;
+  JDIMENSION num_cols = cinfo->image_width;
+
+  while (--num_rows >= 0) {
+    /* It seems fastest to make a separate pass for each component. */
+    for (ci = 0; ci < nc; ci++) {
+      inptr = *input_buf;
+      outptr = output_buf[ci][output_row];
+      for (col = 0; col < num_cols; col++) {
+	outptr[col] = inptr[ci]; /* don't need GETJSAMPLE() here */
+	inptr += nc;
+      }
+    }
+    input_buf++;
+    output_row++;
+  }
+}
+
+
+/*
+ * Empty method for start_pass.
+ */
+
+METHODDEF(void)
+null_method (j_compress_ptr cinfo)
+{
+  /* no work needed */
+}
+
+
+/*
+ * Module initialization routine for input colorspace conversion.
+ */
+
+GLOBAL(void)
+jinit_color_converter (j_compress_ptr cinfo)
+{
+  my_cconvert_ptr cconvert;
+
+  cconvert = (my_cconvert_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_color_converter));
+  cinfo->cconvert = (struct jpeg_color_converter *) cconvert;
+  /* set start_pass to null method until we find out differently */
+  cconvert->pub.start_pass = null_method;
+
+  /* Make sure input_components agrees with in_color_space */
+  switch (cinfo->in_color_space) {
+  case JCS_GRAYSCALE:
+    if (cinfo->input_components != 1)
+      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
+    break;
+
+  case JCS_RGB:
+#if RGB_PIXELSIZE != 3
+    if (cinfo->input_components != RGB_PIXELSIZE)
+      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
+    break;
+#endif /* else share code with YCbCr */
+
+  case JCS_YCbCr:
+    if (cinfo->input_components != 3)
+      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
+    break;
+
+  case JCS_CMYK:
+  case JCS_YCCK:
+    if (cinfo->input_components != 4)
+      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
+    break;
+
+  default:			/* JCS_UNKNOWN can be anything */
+    if (cinfo->input_components < 1)
+      ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
+    break;
+  }
+
+  /* Check num_components, set conversion method based on requested space */
+  switch (cinfo->jpeg_color_space) {
+  case JCS_GRAYSCALE:
+    if (cinfo->num_components != 1)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_GRAYSCALE)
+      cconvert->pub.color_convert = grayscale_convert;
+    else if (cinfo->in_color_space == JCS_RGB) {
+      cconvert->pub.start_pass = rgb_ycc_start;
+      cconvert->pub.color_convert = rgb_gray_convert;
+    } else if (cinfo->in_color_space == JCS_YCbCr)
+      cconvert->pub.color_convert = grayscale_convert;
+    else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_RGB:
+    if (cinfo->num_components != 3)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_RGB && RGB_PIXELSIZE == 3)
+      cconvert->pub.color_convert = null_convert;
+    else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_YCbCr:
+    if (cinfo->num_components != 3)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_RGB) {
+      cconvert->pub.start_pass = rgb_ycc_start;
+      cconvert->pub.color_convert = rgb_ycc_convert;
+    } else if (cinfo->in_color_space == JCS_YCbCr)
+      cconvert->pub.color_convert = null_convert;
+    else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_CMYK:
+    if (cinfo->num_components != 4)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_CMYK)
+      cconvert->pub.color_convert = null_convert;
+    else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_YCCK:
+    if (cinfo->num_components != 4)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    if (cinfo->in_color_space == JCS_CMYK) {
+      cconvert->pub.start_pass = rgb_ycc_start;
+      cconvert->pub.color_convert = cmyk_ycck_convert;
+    } else if (cinfo->in_color_space == JCS_YCCK)
+      cconvert->pub.color_convert = null_convert;
+    else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  default:			/* allow null conversion of JCS_UNKNOWN */
+    if (cinfo->jpeg_color_space != cinfo->in_color_space ||
+	cinfo->num_components != cinfo->input_components)
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    cconvert->pub.color_convert = null_convert;
+    break;
+  }
+}
diff --git a/common/jpeg/jcdctmgr.c b/common/jpeg/jcdctmgr.c
new file mode 100644
index 00000000..61fa79b9
--- /dev/null
+++ b/common/jpeg/jcdctmgr.c
@@ -0,0 +1,387 @@
+/*
+ * jcdctmgr.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the forward-DCT management logic.
+ * This code selects a particular DCT implementation to be used,
+ * and it performs related housekeeping chores including coefficient
+ * quantization.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+
+/* Private subobject for this module */
+
+typedef struct {
+  struct jpeg_forward_dct pub;	/* public fields */
+
+  /* Pointer to the DCT routine actually in use */
+  forward_DCT_method_ptr do_dct;
+
+  /* The actual post-DCT divisors --- not identical to the quant table
+   * entries, because of scaling (especially for an unnormalized DCT).
+   * Each table is given in normal array order.
+   */
+  DCTELEM * divisors[NUM_QUANT_TBLS];
+
+#ifdef DCT_FLOAT_SUPPORTED
+  /* Same as above for the floating-point case. */
+  float_DCT_method_ptr do_float_dct;
+  FAST_FLOAT * float_divisors[NUM_QUANT_TBLS];
+#endif
+} my_fdct_controller;
+
+typedef my_fdct_controller * my_fdct_ptr;
+
+
+/*
+ * Initialize for a processing pass.
+ * Verify that all referenced Q-tables are present, and set up
+ * the divisor table for each one.
+ * In the current implementation, DCT of all components is done during
+ * the first pass, even if only some components will be output in the
+ * first scan.  Hence all components should be examined here.
+ */
+
+METHODDEF(void)
+start_pass_fdctmgr (j_compress_ptr cinfo)
+{
+  my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
+  int ci, qtblno, i;
+  jpeg_component_info *compptr;
+  JQUANT_TBL * qtbl;
+  DCTELEM * dtbl;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    qtblno = compptr->quant_tbl_no;
+    /* Make sure specified quantization table is present */
+    if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS ||
+	cinfo->quant_tbl_ptrs[qtblno] == NULL)
+      ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno);
+    qtbl = cinfo->quant_tbl_ptrs[qtblno];
+    /* Compute divisors for this quant table */
+    /* We may do this more than once for same table, but it's not a big deal */
+    switch (cinfo->dct_method) {
+#ifdef DCT_ISLOW_SUPPORTED
+    case JDCT_ISLOW:
+      /* For LL&M IDCT method, divisors are equal to raw quantization
+       * coefficients multiplied by 8 (to counteract scaling).
+       */
+      if (fdct->divisors[qtblno] == NULL) {
+	fdct->divisors[qtblno] = (DCTELEM *)
+	  (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				      DCTSIZE2 * SIZEOF(DCTELEM));
+      }
+      dtbl = fdct->divisors[qtblno];
+      for (i = 0; i < DCTSIZE2; i++) {
+	dtbl[i] = ((DCTELEM) qtbl->quantval[i]) << 3;
+      }
+      break;
+#endif
+#ifdef DCT_IFAST_SUPPORTED
+    case JDCT_IFAST:
+      {
+	/* For AA&N IDCT method, divisors are equal to quantization
+	 * coefficients scaled by scalefactor[row]*scalefactor[col], where
+	 *   scalefactor[0] = 1
+	 *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
+	 * We apply a further scale factor of 8.
+	 */
+#define CONST_BITS 14
+	static const INT16 aanscales[DCTSIZE2] = {
+	  /* precomputed values scaled up by 14 bits */
+	  16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
+	  22725, 31521, 29692, 26722, 22725, 17855, 12299,  6270,
+	  21407, 29692, 27969, 25172, 21407, 16819, 11585,  5906,
+	  19266, 26722, 25172, 22654, 19266, 15137, 10426,  5315,
+	  16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
+	  12873, 17855, 16819, 15137, 12873, 10114,  6967,  3552,
+	   8867, 12299, 11585, 10426,  8867,  6967,  4799,  2446,
+	   4520,  6270,  5906,  5315,  4520,  3552,  2446,  1247
+	};
+	SHIFT_TEMPS
+
+	if (fdct->divisors[qtblno] == NULL) {
+	  fdct->divisors[qtblno] = (DCTELEM *)
+	    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+					DCTSIZE2 * SIZEOF(DCTELEM));
+	}
+	dtbl = fdct->divisors[qtblno];
+	for (i = 0; i < DCTSIZE2; i++) {
+	  dtbl[i] = (DCTELEM)
+	    DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[i],
+				  (INT32) aanscales[i]),
+		    CONST_BITS-3);
+	}
+      }
+      break;
+#endif
+#ifdef DCT_FLOAT_SUPPORTED
+    case JDCT_FLOAT:
+      {
+	/* For float AA&N IDCT method, divisors are equal to quantization
+	 * coefficients scaled by scalefactor[row]*scalefactor[col], where
+	 *   scalefactor[0] = 1
+	 *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
+	 * We apply a further scale factor of 8.
+	 * What's actually stored is 1/divisor so that the inner loop can
+	 * use a multiplication rather than a division.
+	 */
+	FAST_FLOAT * fdtbl;
+	int row, col;
+	static const double aanscalefactor[DCTSIZE] = {
+	  1.0, 1.387039845, 1.306562965, 1.175875602,
+	  1.0, 0.785694958, 0.541196100, 0.275899379
+	};
+
+	if (fdct->float_divisors[qtblno] == NULL) {
+	  fdct->float_divisors[qtblno] = (FAST_FLOAT *)
+	    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+					DCTSIZE2 * SIZEOF(FAST_FLOAT));
+	}
+	fdtbl = fdct->float_divisors[qtblno];
+	i = 0;
+	for (row = 0; row < DCTSIZE; row++) {
+	  for (col = 0; col < DCTSIZE; col++) {
+	    fdtbl[i] = (FAST_FLOAT)
+	      (1.0 / (((double) qtbl->quantval[i] *
+		       aanscalefactor[row] * aanscalefactor[col] * 8.0)));
+	    i++;
+	  }
+	}
+      }
+      break;
+#endif
+    default:
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+      break;
+    }
+  }
+}
+
+
+/*
+ * Perform forward DCT on one or more blocks of a component.
+ *
+ * The input samples are taken from the sample_data[] array starting at
+ * position start_row/start_col, and moving to the right for any additional
+ * blocks. The quantized coefficients are returned in coef_blocks[].
+ */
+
+METHODDEF(void)
+forward_DCT (j_compress_ptr cinfo, jpeg_component_info * compptr,
+	     JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
+	     JDIMENSION start_row, JDIMENSION start_col,
+	     JDIMENSION num_blocks)
+/* This version is used for integer DCT implementations. */
+{
+  /* This routine is heavily used, so it's worth coding it tightly. */
+  my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
+  forward_DCT_method_ptr do_dct = fdct->do_dct;
+  DCTELEM * divisors = fdct->divisors[compptr->quant_tbl_no];
+  DCTELEM workspace[DCTSIZE2];	/* work area for FDCT subroutine */
+  JDIMENSION bi;
+
+  sample_data += start_row;	/* fold in the vertical offset once */
+
+  for (bi = 0; bi < num_blocks; bi++, start_col += DCTSIZE) {
+    /* Load data into workspace, applying unsigned->signed conversion */
+    { register DCTELEM *workspaceptr;
+      register JSAMPROW elemptr;
+      register int elemr;
+
+      workspaceptr = workspace;
+      for (elemr = 0; elemr < DCTSIZE; elemr++) {
+	elemptr = sample_data[elemr] + start_col;
+#if DCTSIZE == 8		/* unroll the inner loop */
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	*workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+#else
+	{ register int elemc;
+	  for (elemc = DCTSIZE; elemc > 0; elemc--) {
+	    *workspaceptr++ = GETJSAMPLE(*elemptr++) - CENTERJSAMPLE;
+	  }
+	}
+#endif
+      }
+    }
+
+    /* Perform the DCT */
+    (*do_dct) (workspace);
+
+    /* Quantize/descale the coefficients, and store into coef_blocks[] */
+    { register DCTELEM temp, qval;
+      register int i;
+      register JCOEFPTR output_ptr = coef_blocks[bi];
+
+      for (i = 0; i < DCTSIZE2; i++) {
+	qval = divisors[i];
+	temp = workspace[i];
+	/* Divide the coefficient value by qval, ensuring proper rounding.
+	 * Since C does not specify the direction of rounding for negative
+	 * quotients, we have to force the dividend positive for portability.
+	 *
+	 * In most files, at least half of the output values will be zero
+	 * (at default quantization settings, more like three-quarters...)
+	 * so we should ensure that this case is fast.  On many machines,
+	 * a comparison is enough cheaper than a divide to make a special test
+	 * a win.  Since both inputs will be nonnegative, we need only test
+	 * for a < b to discover whether a/b is 0.
+	 * If your machine's division is fast enough, define FAST_DIVIDE.
+	 */
+#ifdef FAST_DIVIDE
+#define DIVIDE_BY(a,b)	a /= b
+#else
+#define DIVIDE_BY(a,b)	if (a >= b) a /= b; else a = 0
+#endif
+	if (temp < 0) {
+	  temp = -temp;
+	  temp += qval>>1;	/* for rounding */
+	  DIVIDE_BY(temp, qval);
+	  temp = -temp;
+	} else {
+	  temp += qval>>1;	/* for rounding */
+	  DIVIDE_BY(temp, qval);
+	}
+	output_ptr[i] = (JCOEF) temp;
+      }
+    }
+  }
+}
+
+
+#ifdef DCT_FLOAT_SUPPORTED
+
+METHODDEF(void)
+forward_DCT_float (j_compress_ptr cinfo, jpeg_component_info * compptr,
+		   JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
+		   JDIMENSION start_row, JDIMENSION start_col,
+		   JDIMENSION num_blocks)
+/* This version is used for floating-point DCT implementations. */
+{
+  /* This routine is heavily used, so it's worth coding it tightly. */
+  my_fdct_ptr fdct = (my_fdct_ptr) cinfo->fdct;
+  float_DCT_method_ptr do_dct = fdct->do_float_dct;
+  FAST_FLOAT * divisors = fdct->float_divisors[compptr->quant_tbl_no];
+  FAST_FLOAT workspace[DCTSIZE2]; /* work area for FDCT subroutine */
+  JDIMENSION bi;
+
+  sample_data += start_row;	/* fold in the vertical offset once */
+
+  for (bi = 0; bi < num_blocks; bi++, start_col += DCTSIZE) {
+    /* Load data into workspace, applying unsigned->signed conversion */
+    { register FAST_FLOAT *workspaceptr;
+      register JSAMPROW elemptr;
+      register int elemr;
+
+      workspaceptr = workspace;
+      for (elemr = 0; elemr < DCTSIZE; elemr++) {
+	elemptr = sample_data[elemr] + start_col;
+#if DCTSIZE == 8		/* unroll the inner loop */
+	*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+	*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+	*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+	*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+	*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+	*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+	*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+	*workspaceptr++ = (FAST_FLOAT)(GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+#else
+	{ register int elemc;
+	  for (elemc = DCTSIZE; elemc > 0; elemc--) {
+	    *workspaceptr++ = (FAST_FLOAT)
+	      (GETJSAMPLE(*elemptr++) - CENTERJSAMPLE);
+	  }
+	}
+#endif
+      }
+    }
+
+    /* Perform the DCT */
+    (*do_dct) (workspace);
+
+    /* Quantize/descale the coefficients, and store into coef_blocks[] */
+    { register FAST_FLOAT temp;
+      register int i;
+      register JCOEFPTR output_ptr = coef_blocks[bi];
+
+      for (i = 0; i < DCTSIZE2; i++) {
+	/* Apply the quantization and scaling factor */
+	temp = workspace[i] * divisors[i];
+	/* Round to nearest integer.
+	 * Since C does not specify the direction of rounding for negative
+	 * quotients, we have to force the dividend positive for portability.
+	 * The maximum coefficient size is +-16K (for 12-bit data), so this
+	 * code should work for either 16-bit or 32-bit ints.
+	 */
+	output_ptr[i] = (JCOEF) ((int) (temp + (FAST_FLOAT) 16384.5) - 16384);
+      }
+    }
+  }
+}
+
+#endif /* DCT_FLOAT_SUPPORTED */
+
+
+/*
+ * Initialize FDCT manager.
+ */
+
+GLOBAL(void)
+jinit_forward_dct (j_compress_ptr cinfo)
+{
+  my_fdct_ptr fdct;
+  int i;
+
+  fdct = (my_fdct_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_fdct_controller));
+  cinfo->fdct = (struct jpeg_forward_dct *) fdct;
+  fdct->pub.start_pass = start_pass_fdctmgr;
+
+  switch (cinfo->dct_method) {
+#ifdef DCT_ISLOW_SUPPORTED
+  case JDCT_ISLOW:
+    fdct->pub.forward_DCT = forward_DCT;
+    fdct->do_dct = jpeg_fdct_islow;
+    break;
+#endif
+#ifdef DCT_IFAST_SUPPORTED
+  case JDCT_IFAST:
+    fdct->pub.forward_DCT = forward_DCT;
+    fdct->do_dct = jpeg_fdct_ifast;
+    break;
+#endif
+#ifdef DCT_FLOAT_SUPPORTED
+  case JDCT_FLOAT:
+    fdct->pub.forward_DCT = forward_DCT_float;
+    fdct->do_float_dct = jpeg_fdct_float;
+    break;
+#endif
+  default:
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+    break;
+  }
+
+  /* Mark divisor tables unallocated */
+  for (i = 0; i < NUM_QUANT_TBLS; i++) {
+    fdct->divisors[i] = NULL;
+#ifdef DCT_FLOAT_SUPPORTED
+    fdct->float_divisors[i] = NULL;
+#endif
+  }
+}
diff --git a/common/jpeg/jchuff.c b/common/jpeg/jchuff.c
new file mode 100644
index 00000000..f2352505
--- /dev/null
+++ b/common/jpeg/jchuff.c
@@ -0,0 +1,909 @@
+/*
+ * jchuff.c
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains Huffman entropy encoding routines.
+ *
+ * Much of the complexity here has to do with supporting output suspension.
+ * If the data destination module demands suspension, we want to be able to
+ * back up to the start of the current MCU.  To do this, we copy state
+ * variables into local working storage, and update them back to the
+ * permanent JPEG objects only upon successful completion of an MCU.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jchuff.h"		/* Declarations shared with jcphuff.c */
+
+
+/* Expanded entropy encoder object for Huffman encoding.
+ *
+ * The savable_state subrecord contains fields that change within an MCU,
+ * but must not be updated permanently until we complete the MCU.
+ */
+
+typedef struct {
+  INT32 put_buffer;		/* current bit-accumulation buffer */
+  int put_bits;			/* # of bits now in it */
+  int last_dc_val[MAX_COMPS_IN_SCAN]; /* last DC coef for each component */
+} savable_state;
+
+/* This macro is to work around compilers with missing or broken
+ * structure assignment.  You'll need to fix this code if you have
+ * such a compiler and you change MAX_COMPS_IN_SCAN.
+ */
+
+#ifndef NO_STRUCT_ASSIGN
+#define ASSIGN_STATE(dest,src)  ((dest) = (src))
+#else
+#if MAX_COMPS_IN_SCAN == 4
+#define ASSIGN_STATE(dest,src)  \
+	((dest).put_buffer = (src).put_buffer, \
+	 (dest).put_bits = (src).put_bits, \
+	 (dest).last_dc_val[0] = (src).last_dc_val[0], \
+	 (dest).last_dc_val[1] = (src).last_dc_val[1], \
+	 (dest).last_dc_val[2] = (src).last_dc_val[2], \
+	 (dest).last_dc_val[3] = (src).last_dc_val[3])
+#endif
+#endif
+
+
+typedef struct {
+  struct jpeg_entropy_encoder pub; /* public fields */
+
+  savable_state saved;		/* Bit buffer & DC state at start of MCU */
+
+  /* These fields are NOT loaded into local working state. */
+  unsigned int restarts_to_go;	/* MCUs left in this restart interval */
+  int next_restart_num;		/* next restart number to write (0-7) */
+
+  /* Pointers to derived tables (these workspaces have image lifespan) */
+  c_derived_tbl * dc_derived_tbls[NUM_HUFF_TBLS];
+  c_derived_tbl * ac_derived_tbls[NUM_HUFF_TBLS];
+
+#ifdef ENTROPY_OPT_SUPPORTED	/* Statistics tables for optimization */
+  long * dc_count_ptrs[NUM_HUFF_TBLS];
+  long * ac_count_ptrs[NUM_HUFF_TBLS];
+#endif
+} huff_entropy_encoder;
+
+typedef huff_entropy_encoder * huff_entropy_ptr;
+
+/* Working state while writing an MCU.
+ * This struct contains all the fields that are needed by subroutines.
+ */
+
+typedef struct {
+  JOCTET * next_output_byte;	/* => next byte to write in buffer */
+  size_t free_in_buffer;	/* # of byte spaces remaining in buffer */
+  savable_state cur;		/* Current bit buffer & DC state */
+  j_compress_ptr cinfo;		/* dump_buffer needs access to this */
+} working_state;
+
+
+/* Forward declarations */
+METHODDEF(boolean) encode_mcu_huff JPP((j_compress_ptr cinfo,
+					JBLOCKROW *MCU_data));
+METHODDEF(void) finish_pass_huff JPP((j_compress_ptr cinfo));
+#ifdef ENTROPY_OPT_SUPPORTED
+METHODDEF(boolean) encode_mcu_gather JPP((j_compress_ptr cinfo,
+					  JBLOCKROW *MCU_data));
+METHODDEF(void) finish_pass_gather JPP((j_compress_ptr cinfo));
+#endif
+
+
+/*
+ * Initialize for a Huffman-compressed scan.
+ * If gather_statistics is TRUE, we do not output anything during the scan,
+ * just count the Huffman symbols used and generate Huffman code tables.
+ */
+
+METHODDEF(void)
+start_pass_huff (j_compress_ptr cinfo, boolean gather_statistics)
+{
+  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
+  int ci, dctbl, actbl;
+  jpeg_component_info * compptr;
+
+  if (gather_statistics) {
+#ifdef ENTROPY_OPT_SUPPORTED
+    entropy->pub.encode_mcu = encode_mcu_gather;
+    entropy->pub.finish_pass = finish_pass_gather;
+#else
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+  } else {
+    entropy->pub.encode_mcu = encode_mcu_huff;
+    entropy->pub.finish_pass = finish_pass_huff;
+  }
+
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    dctbl = compptr->dc_tbl_no;
+    actbl = compptr->ac_tbl_no;
+    if (gather_statistics) {
+#ifdef ENTROPY_OPT_SUPPORTED
+      /* Check for invalid table indexes */
+      /* (make_c_derived_tbl does this in the other path) */
+      if (dctbl < 0 || dctbl >= NUM_HUFF_TBLS)
+	ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, dctbl);
+      if (actbl < 0 || actbl >= NUM_HUFF_TBLS)
+	ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, actbl);
+      /* Allocate and zero the statistics tables */
+      /* Note that jpeg_gen_optimal_table expects 257 entries in each table! */
+      if (entropy->dc_count_ptrs[dctbl] == NULL)
+	entropy->dc_count_ptrs[dctbl] = (long *)
+	  (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				      257 * SIZEOF(long));
+      MEMZERO(entropy->dc_count_ptrs[dctbl], 257 * SIZEOF(long));
+      if (entropy->ac_count_ptrs[actbl] == NULL)
+	entropy->ac_count_ptrs[actbl] = (long *)
+	  (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				      257 * SIZEOF(long));
+      MEMZERO(entropy->ac_count_ptrs[actbl], 257 * SIZEOF(long));
+#endif
+    } else {
+      /* Compute derived values for Huffman tables */
+      /* We may do this more than once for a table, but it's not expensive */
+      jpeg_make_c_derived_tbl(cinfo, TRUE, dctbl,
+			      & entropy->dc_derived_tbls[dctbl]);
+      jpeg_make_c_derived_tbl(cinfo, FALSE, actbl,
+			      & entropy->ac_derived_tbls[actbl]);
+    }
+    /* Initialize DC predictions to 0 */
+    entropy->saved.last_dc_val[ci] = 0;
+  }
+
+  /* Initialize bit buffer to empty */
+  entropy->saved.put_buffer = 0;
+  entropy->saved.put_bits = 0;
+
+  /* Initialize restart stuff */
+  entropy->restarts_to_go = cinfo->restart_interval;
+  entropy->next_restart_num = 0;
+}
+
+
+/*
+ * Compute the derived values for a Huffman table.
+ * This routine also performs some validation checks on the table.
+ *
+ * Note this is also used by jcphuff.c.
+ */
+
+GLOBAL(void)
+jpeg_make_c_derived_tbl (j_compress_ptr cinfo, boolean isDC, int tblno,
+			 c_derived_tbl ** pdtbl)
+{
+  JHUFF_TBL *htbl;
+  c_derived_tbl *dtbl;
+  int p, i, l, lastp, si, maxsymbol;
+  char huffsize[257];
+  unsigned int huffcode[257];
+  unsigned int code;
+
+  /* Note that huffsize[] and huffcode[] are filled in code-length order,
+   * paralleling the order of the symbols themselves in htbl->huffval[].
+   */
+
+  /* Find the input Huffman table */
+  if (tblno < 0 || tblno >= NUM_HUFF_TBLS)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
+  htbl =
+    isDC ? cinfo->dc_huff_tbl_ptrs[tblno] : cinfo->ac_huff_tbl_ptrs[tblno];
+  if (htbl == NULL)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
+
+  /* Allocate a workspace if we haven't already done so. */
+  if (*pdtbl == NULL)
+    *pdtbl = (c_derived_tbl *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  SIZEOF(c_derived_tbl));
+  dtbl = *pdtbl;
+  
+  /* Figure C.1: make table of Huffman code length for each symbol */
+
+  p = 0;
+  for (l = 1; l <= 16; l++) {
+    i = (int) htbl->bits[l];
+    if (i < 0 || p + i > 256)	/* protect against table overrun */
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    while (i--)
+      huffsize[p++] = (char) l;
+  }
+  huffsize[p] = 0;
+  lastp = p;
+  
+  /* Figure C.2: generate the codes themselves */
+  /* We also validate that the counts represent a legal Huffman code tree. */
+
+  code = 0;
+  si = huffsize[0];
+  p = 0;
+  while (huffsize[p]) {
+    while (((int) huffsize[p]) == si) {
+      huffcode[p++] = code;
+      code++;
+    }
+    /* code is now 1 more than the last code used for codelength si; but
+     * it must still fit in si bits, since no code is allowed to be all ones.
+     */
+    if (((INT32) code) >= (((INT32) 1) << si))
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    code <<= 1;
+    si++;
+  }
+  
+  /* Figure C.3: generate encoding tables */
+  /* These are code and size indexed by symbol value */
+
+  /* Set all codeless symbols to have code length 0;
+   * this lets us detect duplicate VAL entries here, and later
+   * allows emit_bits to detect any attempt to emit such symbols.
+   */
+  MEMZERO(dtbl->ehufsi, SIZEOF(dtbl->ehufsi));
+
+  /* This is also a convenient place to check for out-of-range
+   * and duplicated VAL entries.  We allow 0..255 for AC symbols
+   * but only 0..15 for DC.  (We could constrain them further
+   * based on data depth and mode, but this seems enough.)
+   */
+  maxsymbol = isDC ? 15 : 255;
+
+  for (p = 0; p < lastp; p++) {
+    i = htbl->huffval[p];
+    if (i < 0 || i > maxsymbol || dtbl->ehufsi[i])
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    dtbl->ehufco[i] = huffcode[p];
+    dtbl->ehufsi[i] = huffsize[p];
+  }
+}
+
+
+/* Outputting bytes to the file */
+
+/* Emit a byte, taking 'action' if must suspend. */
+#define emit_byte(state,val,action)  \
+	{ *(state)->next_output_byte++ = (JOCTET) (val);  \
+	  if (--(state)->free_in_buffer == 0)  \
+	    if (! dump_buffer(state))  \
+	      { action; } }
+
+
+LOCAL(boolean)
+dump_buffer (working_state * state)
+/* Empty the output buffer; return TRUE if successful, FALSE if must suspend */
+{
+  struct jpeg_destination_mgr * dest = state->cinfo->dest;
+
+  if (! (*dest->empty_output_buffer) (state->cinfo))
+    return FALSE;
+  /* After a successful buffer dump, must reset buffer pointers */
+  state->next_output_byte = dest->next_output_byte;
+  state->free_in_buffer = dest->free_in_buffer;
+  return TRUE;
+}
+
+
+/* Outputting bits to the file */
+
+/* Only the right 24 bits of put_buffer are used; the valid bits are
+ * left-justified in this part.  At most 16 bits can be passed to emit_bits
+ * in one call, and we never retain more than 7 bits in put_buffer
+ * between calls, so 24 bits are sufficient.
+ */
+
+INLINE
+LOCAL(boolean)
+emit_bits (working_state * state, unsigned int code, int size)
+/* Emit some bits; return TRUE if successful, FALSE if must suspend */
+{
+  /* This routine is heavily used, so it's worth coding tightly. */
+  register INT32 put_buffer = (INT32) code;
+  register int put_bits = state->cur.put_bits;
+
+  /* if size is 0, caller used an invalid Huffman table entry */
+  if (size == 0)
+    ERREXIT(state->cinfo, JERR_HUFF_MISSING_CODE);
+
+  put_buffer &= (((INT32) 1)<<size) - 1; /* mask off any extra bits in code */
+  
+  put_bits += size;		/* new number of bits in buffer */
+  
+  put_buffer <<= 24 - put_bits; /* align incoming bits */
+
+  put_buffer |= state->cur.put_buffer; /* and merge with old buffer contents */
+  
+  while (put_bits >= 8) {
+    int c = (int) ((put_buffer >> 16) & 0xFF);
+    
+    emit_byte(state, c, return FALSE);
+    if (c == 0xFF) {		/* need to stuff a zero byte? */
+      emit_byte(state, 0, return FALSE);
+    }
+    put_buffer <<= 8;
+    put_bits -= 8;
+  }
+
+  state->cur.put_buffer = put_buffer; /* update state variables */
+  state->cur.put_bits = put_bits;
+
+  return TRUE;
+}
+
+
+LOCAL(boolean)
+flush_bits (working_state * state)
+{
+  if (! emit_bits(state, 0x7F, 7)) /* fill any partial byte with ones */
+    return FALSE;
+  state->cur.put_buffer = 0;	/* and reset bit-buffer to empty */
+  state->cur.put_bits = 0;
+  return TRUE;
+}
+
+
+/* Encode a single block's worth of coefficients */
+
+LOCAL(boolean)
+encode_one_block (working_state * state, JCOEFPTR block, int last_dc_val,
+		  c_derived_tbl *dctbl, c_derived_tbl *actbl)
+{
+  register int temp, temp2;
+  register int nbits;
+  register int k, r, i;
+  
+  /* Encode the DC coefficient difference per section F.1.2.1 */
+  
+  temp = temp2 = block[0] - last_dc_val;
+
+  if (temp < 0) {
+    temp = -temp;		/* temp is abs value of input */
+    /* For a negative input, want temp2 = bitwise complement of abs(input) */
+    /* This code assumes we are on a two's complement machine */
+    temp2--;
+  }
+  
+  /* Find the number of bits needed for the magnitude of the coefficient */
+  nbits = 0;
+  while (temp) {
+    nbits++;
+    temp >>= 1;
+  }
+  /* Check for out-of-range coefficient values.
+   * Since we're encoding a difference, the range limit is twice as much.
+   */
+  if (nbits > MAX_COEF_BITS+1)
+    ERREXIT(state->cinfo, JERR_BAD_DCT_COEF);
+  
+  /* Emit the Huffman-coded symbol for the number of bits */
+  if (! emit_bits(state, dctbl->ehufco[nbits], dctbl->ehufsi[nbits]))
+    return FALSE;
+
+  /* Emit that number of bits of the value, if positive, */
+  /* or the complement of its magnitude, if negative. */
+  if (nbits)			/* emit_bits rejects calls with size 0 */
+    if (! emit_bits(state, (unsigned int) temp2, nbits))
+      return FALSE;
+
+  /* Encode the AC coefficients per section F.1.2.2 */
+  
+  r = 0;			/* r = run length of zeros */
+  
+  for (k = 1; k < DCTSIZE2; k++) {
+    if ((temp = block[jpeg_natural_order[k]]) == 0) {
+      r++;
+    } else {
+      /* if run length > 15, must emit special run-length-16 codes (0xF0) */
+      while (r > 15) {
+	if (! emit_bits(state, actbl->ehufco[0xF0], actbl->ehufsi[0xF0]))
+	  return FALSE;
+	r -= 16;
+      }
+
+      temp2 = temp;
+      if (temp < 0) {
+	temp = -temp;		/* temp is abs value of input */
+	/* This code assumes we are on a two's complement machine */
+	temp2--;
+      }
+      
+      /* Find the number of bits needed for the magnitude of the coefficient */
+      nbits = 1;		/* there must be at least one 1 bit */
+      while ((temp >>= 1))
+	nbits++;
+      /* Check for out-of-range coefficient values */
+      if (nbits > MAX_COEF_BITS)
+	ERREXIT(state->cinfo, JERR_BAD_DCT_COEF);
+      
+      /* Emit Huffman symbol for run length / number of bits */
+      i = (r << 4) + nbits;
+      if (! emit_bits(state, actbl->ehufco[i], actbl->ehufsi[i]))
+	return FALSE;
+
+      /* Emit that number of bits of the value, if positive, */
+      /* or the complement of its magnitude, if negative. */
+      if (! emit_bits(state, (unsigned int) temp2, nbits))
+	return FALSE;
+      
+      r = 0;
+    }
+  }
+
+  /* If the last coef(s) were zero, emit an end-of-block code */
+  if (r > 0)
+    if (! emit_bits(state, actbl->ehufco[0], actbl->ehufsi[0]))
+      return FALSE;
+
+  return TRUE;
+}
+
+
+/*
+ * Emit a restart marker & resynchronize predictions.
+ */
+
+LOCAL(boolean)
+emit_restart (working_state * state, int restart_num)
+{
+  int ci;
+
+  if (! flush_bits(state))
+    return FALSE;
+
+  emit_byte(state, 0xFF, return FALSE);
+  emit_byte(state, JPEG_RST0 + restart_num, return FALSE);
+
+  /* Re-initialize DC predictions to 0 */
+  for (ci = 0; ci < state->cinfo->comps_in_scan; ci++)
+    state->cur.last_dc_val[ci] = 0;
+
+  /* The restart counter is not updated until we successfully write the MCU. */
+
+  return TRUE;
+}
+
+
+/*
+ * Encode and output one MCU's worth of Huffman-compressed coefficients.
+ */
+
+METHODDEF(boolean)
+encode_mcu_huff (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
+{
+  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
+  working_state state;
+  int blkn, ci;
+  jpeg_component_info * compptr;
+
+  /* Load up working state */
+  state.next_output_byte = cinfo->dest->next_output_byte;
+  state.free_in_buffer = cinfo->dest->free_in_buffer;
+  ASSIGN_STATE(state.cur, entropy->saved);
+  state.cinfo = cinfo;
+
+  /* Emit restart marker if needed */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0)
+      if (! emit_restart(&state, entropy->next_restart_num))
+	return FALSE;
+  }
+
+  /* Encode the MCU data blocks */
+  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+    ci = cinfo->MCU_membership[blkn];
+    compptr = cinfo->cur_comp_info[ci];
+    if (! encode_one_block(&state,
+			   MCU_data[blkn][0], state.cur.last_dc_val[ci],
+			   entropy->dc_derived_tbls[compptr->dc_tbl_no],
+			   entropy->ac_derived_tbls[compptr->ac_tbl_no]))
+      return FALSE;
+    /* Update last_dc_val */
+    state.cur.last_dc_val[ci] = MCU_data[blkn][0][0];
+  }
+
+  /* Completed MCU, so update state */
+  cinfo->dest->next_output_byte = state.next_output_byte;
+  cinfo->dest->free_in_buffer = state.free_in_buffer;
+  ASSIGN_STATE(entropy->saved, state.cur);
+
+  /* Update restart-interval state too */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0) {
+      entropy->restarts_to_go = cinfo->restart_interval;
+      entropy->next_restart_num++;
+      entropy->next_restart_num &= 7;
+    }
+    entropy->restarts_to_go--;
+  }
+
+  return TRUE;
+}
+
+
+/*
+ * Finish up at the end of a Huffman-compressed scan.
+ */
+
+METHODDEF(void)
+finish_pass_huff (j_compress_ptr cinfo)
+{
+  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
+  working_state state;
+
+  /* Load up working state ... flush_bits needs it */
+  state.next_output_byte = cinfo->dest->next_output_byte;
+  state.free_in_buffer = cinfo->dest->free_in_buffer;
+  ASSIGN_STATE(state.cur, entropy->saved);
+  state.cinfo = cinfo;
+
+  /* Flush out the last data */
+  if (! flush_bits(&state))
+    ERREXIT(cinfo, JERR_CANT_SUSPEND);
+
+  /* Update state */
+  cinfo->dest->next_output_byte = state.next_output_byte;
+  cinfo->dest->free_in_buffer = state.free_in_buffer;
+  ASSIGN_STATE(entropy->saved, state.cur);
+}
+
+
+/*
+ * Huffman coding optimization.
+ *
+ * We first scan the supplied data and count the number of uses of each symbol
+ * that is to be Huffman-coded. (This process MUST agree with the code above.)
+ * Then we build a Huffman coding tree for the observed counts.
+ * Symbols which are not needed at all for the particular image are not
+ * assigned any code, which saves space in the DHT marker as well as in
+ * the compressed data.
+ */
+
+#ifdef ENTROPY_OPT_SUPPORTED
+
+
+/* Process a single block's worth of coefficients */
+
+LOCAL(void)
+htest_one_block (j_compress_ptr cinfo, JCOEFPTR block, int last_dc_val,
+		 long dc_counts[], long ac_counts[])
+{
+  register int temp;
+  register int nbits;
+  register int k, r;
+  
+  /* Encode the DC coefficient difference per section F.1.2.1 */
+  
+  temp = block[0] - last_dc_val;
+  if (temp < 0)
+    temp = -temp;
+  
+  /* Find the number of bits needed for the magnitude of the coefficient */
+  nbits = 0;
+  while (temp) {
+    nbits++;
+    temp >>= 1;
+  }
+  /* Check for out-of-range coefficient values.
+   * Since we're encoding a difference, the range limit is twice as much.
+   */
+  if (nbits > MAX_COEF_BITS+1)
+    ERREXIT(cinfo, JERR_BAD_DCT_COEF);
+
+  /* Count the Huffman symbol for the number of bits */
+  dc_counts[nbits]++;
+  
+  /* Encode the AC coefficients per section F.1.2.2 */
+  
+  r = 0;			/* r = run length of zeros */
+  
+  for (k = 1; k < DCTSIZE2; k++) {
+    if ((temp = block[jpeg_natural_order[k]]) == 0) {
+      r++;
+    } else {
+      /* if run length > 15, must emit special run-length-16 codes (0xF0) */
+      while (r > 15) {
+	ac_counts[0xF0]++;
+	r -= 16;
+      }
+      
+      /* Find the number of bits needed for the magnitude of the coefficient */
+      if (temp < 0)
+	temp = -temp;
+      
+      /* Find the number of bits needed for the magnitude of the coefficient */
+      nbits = 1;		/* there must be at least one 1 bit */
+      while ((temp >>= 1))
+	nbits++;
+      /* Check for out-of-range coefficient values */
+      if (nbits > MAX_COEF_BITS)
+	ERREXIT(cinfo, JERR_BAD_DCT_COEF);
+      
+      /* Count Huffman symbol for run length / number of bits */
+      ac_counts[(r << 4) + nbits]++;
+      
+      r = 0;
+    }
+  }
+
+  /* If the last coef(s) were zero, emit an end-of-block code */
+  if (r > 0)
+    ac_counts[0]++;
+}
+
+
+/*
+ * Trial-encode one MCU's worth of Huffman-compressed coefficients.
+ * No data is actually output, so no suspension return is possible.
+ */
+
+METHODDEF(boolean)
+encode_mcu_gather (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
+{
+  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
+  int blkn, ci;
+  jpeg_component_info * compptr;
+
+  /* Take care of restart intervals if needed */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0) {
+      /* Re-initialize DC predictions to 0 */
+      for (ci = 0; ci < cinfo->comps_in_scan; ci++)
+	entropy->saved.last_dc_val[ci] = 0;
+      /* Update restart state */
+      entropy->restarts_to_go = cinfo->restart_interval;
+    }
+    entropy->restarts_to_go--;
+  }
+
+  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+    ci = cinfo->MCU_membership[blkn];
+    compptr = cinfo->cur_comp_info[ci];
+    htest_one_block(cinfo, MCU_data[blkn][0], entropy->saved.last_dc_val[ci],
+		    entropy->dc_count_ptrs[compptr->dc_tbl_no],
+		    entropy->ac_count_ptrs[compptr->ac_tbl_no]);
+    entropy->saved.last_dc_val[ci] = MCU_data[blkn][0][0];
+  }
+
+  return TRUE;
+}
+
+
+/*
+ * Generate the best Huffman code table for the given counts, fill htbl.
+ * Note this is also used by jcphuff.c.
+ *
+ * The JPEG standard requires that no symbol be assigned a codeword of all
+ * one bits (so that padding bits added at the end of a compressed segment
+ * can't look like a valid code).  Because of the canonical ordering of
+ * codewords, this just means that there must be an unused slot in the
+ * longest codeword length category.  Section K.2 of the JPEG spec suggests
+ * reserving such a slot by pretending that symbol 256 is a valid symbol
+ * with count 1.  In theory that's not optimal; giving it count zero but
+ * including it in the symbol set anyway should give a better Huffman code.
+ * But the theoretically better code actually seems to come out worse in
+ * practice, because it produces more all-ones bytes (which incur stuffed
+ * zero bytes in the final file).  In any case the difference is tiny.
+ *
+ * The JPEG standard requires Huffman codes to be no more than 16 bits long.
+ * If some symbols have a very small but nonzero probability, the Huffman tree
+ * must be adjusted to meet the code length restriction.  We currently use
+ * the adjustment method suggested in JPEG section K.2.  This method is *not*
+ * optimal; it may not choose the best possible limited-length code.  But
+ * typically only very-low-frequency symbols will be given less-than-optimal
+ * lengths, so the code is almost optimal.  Experimental comparisons against
+ * an optimal limited-length-code algorithm indicate that the difference is
+ * microscopic --- usually less than a hundredth of a percent of total size.
+ * So the extra complexity of an optimal algorithm doesn't seem worthwhile.
+ */
+
+GLOBAL(void)
+jpeg_gen_optimal_table (j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[])
+{
+#define MAX_CLEN 32		/* assumed maximum initial code length */
+  UINT8 bits[MAX_CLEN+1];	/* bits[k] = # of symbols with code length k */
+  int codesize[257];		/* codesize[k] = code length of symbol k */
+  int others[257];		/* next symbol in current branch of tree */
+  int c1, c2;
+  int p, i, j;
+  long v;
+
+  /* This algorithm is explained in section K.2 of the JPEG standard */
+
+  MEMZERO(bits, SIZEOF(bits));
+  MEMZERO(codesize, SIZEOF(codesize));
+  for (i = 0; i < 257; i++)
+    others[i] = -1;		/* init links to empty */
+  
+  freq[256] = 1;		/* make sure 256 has a nonzero count */
+  /* Including the pseudo-symbol 256 in the Huffman procedure guarantees
+   * that no real symbol is given code-value of all ones, because 256
+   * will be placed last in the largest codeword category.
+   */
+
+  /* Huffman's basic algorithm to assign optimal code lengths to symbols */
+
+  for (;;) {
+    /* Find the smallest nonzero frequency, set c1 = its symbol */
+    /* In case of ties, take the larger symbol number */
+    c1 = -1;
+    v = 1000000000L;
+    for (i = 0; i <= 256; i++) {
+      if (freq[i] && freq[i] <= v) {
+	v = freq[i];
+	c1 = i;
+      }
+    }
+
+    /* Find the next smallest nonzero frequency, set c2 = its symbol */
+    /* In case of ties, take the larger symbol number */
+    c2 = -1;
+    v = 1000000000L;
+    for (i = 0; i <= 256; i++) {
+      if (freq[i] && freq[i] <= v && i != c1) {
+	v = freq[i];
+	c2 = i;
+      }
+    }
+
+    /* Done if we've merged everything into one frequency */
+    if (c2 < 0)
+      break;
+    
+    /* Else merge the two counts/trees */
+    freq[c1] += freq[c2];
+    freq[c2] = 0;
+
+    /* Increment the codesize of everything in c1's tree branch */
+    codesize[c1]++;
+    while (others[c1] >= 0) {
+      c1 = others[c1];
+      codesize[c1]++;
+    }
+    
+    others[c1] = c2;		/* chain c2 onto c1's tree branch */
+    
+    /* Increment the codesize of everything in c2's tree branch */
+    codesize[c2]++;
+    while (others[c2] >= 0) {
+      c2 = others[c2];
+      codesize[c2]++;
+    }
+  }
+
+  /* Now count the number of symbols of each code length */
+  for (i = 0; i <= 256; i++) {
+    if (codesize[i]) {
+      /* The JPEG standard seems to think that this can't happen, */
+      /* but I'm paranoid... */
+      if (codesize[i] > MAX_CLEN)
+	ERREXIT(cinfo, JERR_HUFF_CLEN_OVERFLOW);
+
+      bits[codesize[i]]++;
+    }
+  }
+
+  /* JPEG doesn't allow symbols with code lengths over 16 bits, so if the pure
+   * Huffman procedure assigned any such lengths, we must adjust the coding.
+   * Here is what the JPEG spec says about how this next bit works:
+   * Since symbols are paired for the longest Huffman code, the symbols are
+   * removed from this length category two at a time.  The prefix for the pair
+   * (which is one bit shorter) is allocated to one of the pair; then,
+   * skipping the BITS entry for that prefix length, a code word from the next
+   * shortest nonzero BITS entry is converted into a prefix for two code words
+   * one bit longer.
+   */
+  
+  for (i = MAX_CLEN; i > 16; i--) {
+    while (bits[i] > 0) {
+      j = i - 2;		/* find length of new prefix to be used */
+      while (bits[j] == 0)
+	j--;
+      
+      bits[i] -= 2;		/* remove two symbols */
+      bits[i-1]++;		/* one goes in this length */
+      bits[j+1] += 2;		/* two new symbols in this length */
+      bits[j]--;		/* symbol of this length is now a prefix */
+    }
+  }
+
+  /* Remove the count for the pseudo-symbol 256 from the largest codelength */
+  while (bits[i] == 0)		/* find largest codelength still in use */
+    i--;
+  bits[i]--;
+  
+  /* Return final symbol counts (only for lengths 0..16) */
+  MEMCOPY(htbl->bits, bits, SIZEOF(htbl->bits));
+  
+  /* Return a list of the symbols sorted by code length */
+  /* It's not real clear to me why we don't need to consider the codelength
+   * changes made above, but the JPEG spec seems to think this works.
+   */
+  p = 0;
+  for (i = 1; i <= MAX_CLEN; i++) {
+    for (j = 0; j <= 255; j++) {
+      if (codesize[j] == i) {
+	htbl->huffval[p] = (UINT8) j;
+	p++;
+      }
+    }
+  }
+
+  /* Set sent_table FALSE so updated table will be written to JPEG file. */
+  htbl->sent_table = FALSE;
+}
+
+
+/*
+ * Finish up a statistics-gathering pass and create the new Huffman tables.
+ */
+
+METHODDEF(void)
+finish_pass_gather (j_compress_ptr cinfo)
+{
+  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
+  int ci, dctbl, actbl;
+  jpeg_component_info * compptr;
+  JHUFF_TBL **htblptr;
+  boolean did_dc[NUM_HUFF_TBLS];
+  boolean did_ac[NUM_HUFF_TBLS];
+
+  /* It's important not to apply jpeg_gen_optimal_table more than once
+   * per table, because it clobbers the input frequency counts!
+   */
+  MEMZERO(did_dc, SIZEOF(did_dc));
+  MEMZERO(did_ac, SIZEOF(did_ac));
+
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    dctbl = compptr->dc_tbl_no;
+    actbl = compptr->ac_tbl_no;
+    if (! did_dc[dctbl]) {
+      htblptr = & cinfo->dc_huff_tbl_ptrs[dctbl];
+      if (*htblptr == NULL)
+	*htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
+      jpeg_gen_optimal_table(cinfo, *htblptr, entropy->dc_count_ptrs[dctbl]);
+      did_dc[dctbl] = TRUE;
+    }
+    if (! did_ac[actbl]) {
+      htblptr = & cinfo->ac_huff_tbl_ptrs[actbl];
+      if (*htblptr == NULL)
+	*htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
+      jpeg_gen_optimal_table(cinfo, *htblptr, entropy->ac_count_ptrs[actbl]);
+      did_ac[actbl] = TRUE;
+    }
+  }
+}
+
+
+#endif /* ENTROPY_OPT_SUPPORTED */
+
+
+/*
+ * Module initialization routine for Huffman entropy encoding.
+ */
+
+GLOBAL(void)
+jinit_huff_encoder (j_compress_ptr cinfo)
+{
+  huff_entropy_ptr entropy;
+  int i;
+
+  entropy = (huff_entropy_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(huff_entropy_encoder));
+  cinfo->entropy = (struct jpeg_entropy_encoder *) entropy;
+  entropy->pub.start_pass = start_pass_huff;
+
+  /* Mark tables unallocated */
+  for (i = 0; i < NUM_HUFF_TBLS; i++) {
+    entropy->dc_derived_tbls[i] = entropy->ac_derived_tbls[i] = NULL;
+#ifdef ENTROPY_OPT_SUPPORTED
+    entropy->dc_count_ptrs[i] = entropy->ac_count_ptrs[i] = NULL;
+#endif
+  }
+}
diff --git a/common/jpeg/jchuff.h b/common/jpeg/jchuff.h
new file mode 100644
index 00000000..a9599fc1
--- /dev/null
+++ b/common/jpeg/jchuff.h
@@ -0,0 +1,47 @@
+/*
+ * jchuff.h
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains declarations for Huffman entropy encoding routines
+ * that are shared between the sequential encoder (jchuff.c) and the
+ * progressive encoder (jcphuff.c).  No other modules need to see these.
+ */
+
+/* The legal range of a DCT coefficient is
+ *  -1024 .. +1023  for 8-bit data;
+ * -16384 .. +16383 for 12-bit data.
+ * Hence the magnitude should always fit in 10 or 14 bits respectively.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define MAX_COEF_BITS 10
+#else
+#define MAX_COEF_BITS 14
+#endif
+
+/* Derived data constructed for each Huffman table */
+
+typedef struct {
+  unsigned int ehufco[256];	/* code for each symbol */
+  char ehufsi[256];		/* length of code for each symbol */
+  /* If no code has been allocated for a symbol S, ehufsi[S] contains 0 */
+} c_derived_tbl;
+
+/* Short forms of external names for systems with brain-damaged linkers. */
+
+#ifdef NEED_SHORT_EXTERNAL_NAMES
+#define jpeg_make_c_derived_tbl	jMkCDerived
+#define jpeg_gen_optimal_table	jGenOptTbl
+#endif /* NEED_SHORT_EXTERNAL_NAMES */
+
+/* Expand a Huffman table definition into the derived format */
+EXTERN(void) jpeg_make_c_derived_tbl
+	JPP((j_compress_ptr cinfo, boolean isDC, int tblno,
+	     c_derived_tbl ** pdtbl));
+
+/* Generate an optimal table definition given the specified counts */
+EXTERN(void) jpeg_gen_optimal_table
+	JPP((j_compress_ptr cinfo, JHUFF_TBL * htbl, long freq[]));
diff --git a/common/jpeg/jcinit.c b/common/jpeg/jcinit.c
new file mode 100644
index 00000000..5efffe33
--- /dev/null
+++ b/common/jpeg/jcinit.c
@@ -0,0 +1,72 @@
+/*
+ * jcinit.c
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains initialization logic for the JPEG compressor.
+ * This routine is in charge of selecting the modules to be executed and
+ * making an initialization call to each one.
+ *
+ * Logically, this code belongs in jcmaster.c.  It's split out because
+ * linking this routine implies linking the entire compression library.
+ * For a transcoding-only application, we want to be able to use jcmaster.c
+ * without linking in the whole library.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * Master selection of compression modules.
+ * This is done once at the start of processing an image.  We determine
+ * which modules will be used and give them appropriate initialization calls.
+ */
+
+GLOBAL(void)
+jinit_compress_master (j_compress_ptr cinfo)
+{
+  /* Initialize master control (includes parameter checking/processing) */
+  jinit_c_master_control(cinfo, FALSE /* full compression */);
+
+  /* Preprocessing */
+  if (! cinfo->raw_data_in) {
+    jinit_color_converter(cinfo);
+    jinit_downsampler(cinfo);
+    jinit_c_prep_controller(cinfo, FALSE /* never need full buffer here */);
+  }
+  /* Forward DCT */
+  jinit_forward_dct(cinfo);
+  /* Entropy encoding: either Huffman or arithmetic coding. */
+  if (cinfo->arith_code) {
+    ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
+  } else {
+    if (cinfo->progressive_mode) {
+#ifdef C_PROGRESSIVE_SUPPORTED
+      jinit_phuff_encoder(cinfo);
+#else
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+    } else
+      jinit_huff_encoder(cinfo);
+  }
+
+  /* Need a full-image coefficient buffer in any multi-pass mode. */
+  jinit_c_coef_controller(cinfo,
+		(boolean) (cinfo->num_scans > 1 || cinfo->optimize_coding));
+  jinit_c_main_controller(cinfo, FALSE /* never need full buffer here */);
+
+  jinit_marker_writer(cinfo);
+
+  /* We can now tell the memory manager to allocate virtual arrays. */
+  (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
+
+  /* Write the datastream header (SOI) immediately.
+   * Frame and scan headers are postponed till later.
+   * This lets application insert special markers after the SOI.
+   */
+  (*cinfo->marker->write_file_header) (cinfo);
+}
diff --git a/common/jpeg/jcmainct.c b/common/jpeg/jcmainct.c
new file mode 100644
index 00000000..e0279a7e
--- /dev/null
+++ b/common/jpeg/jcmainct.c
@@ -0,0 +1,293 @@
+/*
+ * jcmainct.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the main buffer controller for compression.
+ * The main buffer lies between the pre-processor and the JPEG
+ * compressor proper; it holds downsampled data in the JPEG colorspace.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Note: currently, there is no operating mode in which a full-image buffer
+ * is needed at this step.  If there were, that mode could not be used with
+ * "raw data" input, since this module is bypassed in that case.  However,
+ * we've left the code here for possible use in special applications.
+ */
+#undef FULL_MAIN_BUFFER_SUPPORTED
+
+
+/* Private buffer controller object */
+
+typedef struct {
+  struct jpeg_c_main_controller pub; /* public fields */
+
+  JDIMENSION cur_iMCU_row;	/* number of current iMCU row */
+  JDIMENSION rowgroup_ctr;	/* counts row groups received in iMCU row */
+  boolean suspended;		/* remember if we suspended output */
+  J_BUF_MODE pass_mode;		/* current operating mode */
+
+  /* If using just a strip buffer, this points to the entire set of buffers
+   * (we allocate one for each component).  In the full-image case, this
+   * points to the currently accessible strips of the virtual arrays.
+   */
+  JSAMPARRAY buffer[MAX_COMPONENTS];
+
+#ifdef FULL_MAIN_BUFFER_SUPPORTED
+  /* If using full-image storage, this array holds pointers to virtual-array
+   * control blocks for each component.  Unused if not full-image storage.
+   */
+  jvirt_sarray_ptr whole_image[MAX_COMPONENTS];
+#endif
+} my_main_controller;
+
+typedef my_main_controller * my_main_ptr;
+
+
+/* Forward declarations */
+METHODDEF(void) process_data_simple_main
+	JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,
+	     JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));
+#ifdef FULL_MAIN_BUFFER_SUPPORTED
+METHODDEF(void) process_data_buffer_main
+	JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf,
+	     JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail));
+#endif
+
+
+/*
+ * Initialize for a processing pass.
+ */
+
+METHODDEF(void)
+start_pass_main (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+
+  /* Do nothing in raw-data mode. */
+  if (cinfo->raw_data_in)
+    return;
+
+  main->cur_iMCU_row = 0;	/* initialize counters */
+  main->rowgroup_ctr = 0;
+  main->suspended = FALSE;
+  main->pass_mode = pass_mode;	/* save mode for use by process_data */
+
+  switch (pass_mode) {
+  case JBUF_PASS_THRU:
+#ifdef FULL_MAIN_BUFFER_SUPPORTED
+    if (main->whole_image[0] != NULL)
+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+#endif
+    main->pub.process_data = process_data_simple_main;
+    break;
+#ifdef FULL_MAIN_BUFFER_SUPPORTED
+  case JBUF_SAVE_SOURCE:
+  case JBUF_CRANK_DEST:
+  case JBUF_SAVE_AND_PASS:
+    if (main->whole_image[0] == NULL)
+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    main->pub.process_data = process_data_buffer_main;
+    break;
+#endif
+  default:
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    break;
+  }
+}
+
+
+/*
+ * Process some data.
+ * This routine handles the simple pass-through mode,
+ * where we have only a strip buffer.
+ */
+
+METHODDEF(void)
+process_data_simple_main (j_compress_ptr cinfo,
+			  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
+			  JDIMENSION in_rows_avail)
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+
+  while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {
+    /* Read input data if we haven't filled the main buffer yet */
+    if (main->rowgroup_ctr < DCTSIZE)
+      (*cinfo->prep->pre_process_data) (cinfo,
+					input_buf, in_row_ctr, in_rows_avail,
+					main->buffer, &main->rowgroup_ctr,
+					(JDIMENSION) DCTSIZE);
+
+    /* If we don't have a full iMCU row buffered, return to application for
+     * more data.  Note that preprocessor will always pad to fill the iMCU row
+     * at the bottom of the image.
+     */
+    if (main->rowgroup_ctr != DCTSIZE)
+      return;
+
+    /* Send the completed row to the compressor */
+    if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {
+      /* If compressor did not consume the whole row, then we must need to
+       * suspend processing and return to the application.  In this situation
+       * we pretend we didn't yet consume the last input row; otherwise, if
+       * it happened to be the last row of the image, the application would
+       * think we were done.
+       */
+      if (! main->suspended) {
+	(*in_row_ctr)--;
+	main->suspended = TRUE;
+      }
+      return;
+    }
+    /* We did finish the row.  Undo our little suspension hack if a previous
+     * call suspended; then mark the main buffer empty.
+     */
+    if (main->suspended) {
+      (*in_row_ctr)++;
+      main->suspended = FALSE;
+    }
+    main->rowgroup_ctr = 0;
+    main->cur_iMCU_row++;
+  }
+}
+
+
+#ifdef FULL_MAIN_BUFFER_SUPPORTED
+
+/*
+ * Process some data.
+ * This routine handles all of the modes that use a full-size buffer.
+ */
+
+METHODDEF(void)
+process_data_buffer_main (j_compress_ptr cinfo,
+			  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
+			  JDIMENSION in_rows_avail)
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+  int ci;
+  jpeg_component_info *compptr;
+  boolean writing = (main->pass_mode != JBUF_CRANK_DEST);
+
+  while (main->cur_iMCU_row < cinfo->total_iMCU_rows) {
+    /* Realign the virtual buffers if at the start of an iMCU row. */
+    if (main->rowgroup_ctr == 0) {
+      for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	   ci++, compptr++) {
+	main->buffer[ci] = (*cinfo->mem->access_virt_sarray)
+	  ((j_common_ptr) cinfo, main->whole_image[ci],
+	   main->cur_iMCU_row * (compptr->v_samp_factor * DCTSIZE),
+	   (JDIMENSION) (compptr->v_samp_factor * DCTSIZE), writing);
+      }
+      /* In a read pass, pretend we just read some source data. */
+      if (! writing) {
+	*in_row_ctr += cinfo->max_v_samp_factor * DCTSIZE;
+	main->rowgroup_ctr = DCTSIZE;
+      }
+    }
+
+    /* If a write pass, read input data until the current iMCU row is full. */
+    /* Note: preprocessor will pad if necessary to fill the last iMCU row. */
+    if (writing) {
+      (*cinfo->prep->pre_process_data) (cinfo,
+					input_buf, in_row_ctr, in_rows_avail,
+					main->buffer, &main->rowgroup_ctr,
+					(JDIMENSION) DCTSIZE);
+      /* Return to application if we need more data to fill the iMCU row. */
+      if (main->rowgroup_ctr < DCTSIZE)
+	return;
+    }
+
+    /* Emit data, unless this is a sink-only pass. */
+    if (main->pass_mode != JBUF_SAVE_SOURCE) {
+      if (! (*cinfo->coef->compress_data) (cinfo, main->buffer)) {
+	/* If compressor did not consume the whole row, then we must need to
+	 * suspend processing and return to the application.  In this situation
+	 * we pretend we didn't yet consume the last input row; otherwise, if
+	 * it happened to be the last row of the image, the application would
+	 * think we were done.
+	 */
+	if (! main->suspended) {
+	  (*in_row_ctr)--;
+	  main->suspended = TRUE;
+	}
+	return;
+      }
+      /* We did finish the row.  Undo our little suspension hack if a previous
+       * call suspended; then mark the main buffer empty.
+       */
+      if (main->suspended) {
+	(*in_row_ctr)++;
+	main->suspended = FALSE;
+      }
+    }
+
+    /* If get here, we are done with this iMCU row.  Mark buffer empty. */
+    main->rowgroup_ctr = 0;
+    main->cur_iMCU_row++;
+  }
+}
+
+#endif /* FULL_MAIN_BUFFER_SUPPORTED */
+
+
+/*
+ * Initialize main buffer controller.
+ */
+
+GLOBAL(void)
+jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer)
+{
+  my_main_ptr main;
+  int ci;
+  jpeg_component_info *compptr;
+
+  main = (my_main_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_main_controller));
+  cinfo->main = (struct jpeg_c_main_controller *) main;
+  main->pub.start_pass = start_pass_main;
+
+  /* We don't need to create a buffer in raw-data mode. */
+  if (cinfo->raw_data_in)
+    return;
+
+  /* Create the buffer.  It holds downsampled data, so each component
+   * may be of a different size.
+   */
+  if (need_full_buffer) {
+#ifdef FULL_MAIN_BUFFER_SUPPORTED
+    /* Allocate a full-image virtual array for each component */
+    /* Note we pad the bottom to a multiple of the iMCU height */
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	 ci++, compptr++) {
+      main->whole_image[ci] = (*cinfo->mem->request_virt_sarray)
+	((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
+	 compptr->width_in_blocks * DCTSIZE,
+	 (JDIMENSION) jround_up((long) compptr->height_in_blocks,
+				(long) compptr->v_samp_factor) * DCTSIZE,
+	 (JDIMENSION) (compptr->v_samp_factor * DCTSIZE));
+    }
+#else
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+#endif
+  } else {
+#ifdef FULL_MAIN_BUFFER_SUPPORTED
+    main->whole_image[0] = NULL; /* flag for no virtual arrays */
+#endif
+    /* Allocate a strip buffer for each component */
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	 ci++, compptr++) {
+      main->buffer[ci] = (*cinfo->mem->alloc_sarray)
+	((j_common_ptr) cinfo, JPOOL_IMAGE,
+	 compptr->width_in_blocks * DCTSIZE,
+	 (JDIMENSION) (compptr->v_samp_factor * DCTSIZE));
+    }
+  }
+}
diff --git a/common/jpeg/jcmarker.c b/common/jpeg/jcmarker.c
new file mode 100644
index 00000000..3d1e6c6d
--- /dev/null
+++ b/common/jpeg/jcmarker.c
@@ -0,0 +1,664 @@
+/*
+ * jcmarker.c
+ *
+ * Copyright (C) 1991-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains routines to write JPEG datastream markers.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+typedef enum {			/* JPEG marker codes */
+  M_SOF0  = 0xc0,
+  M_SOF1  = 0xc1,
+  M_SOF2  = 0xc2,
+  M_SOF3  = 0xc3,
+  
+  M_SOF5  = 0xc5,
+  M_SOF6  = 0xc6,
+  M_SOF7  = 0xc7,
+  
+  M_JPG   = 0xc8,
+  M_SOF9  = 0xc9,
+  M_SOF10 = 0xca,
+  M_SOF11 = 0xcb,
+  
+  M_SOF13 = 0xcd,
+  M_SOF14 = 0xce,
+  M_SOF15 = 0xcf,
+  
+  M_DHT   = 0xc4,
+  
+  M_DAC   = 0xcc,
+  
+  M_RST0  = 0xd0,
+  M_RST1  = 0xd1,
+  M_RST2  = 0xd2,
+  M_RST3  = 0xd3,
+  M_RST4  = 0xd4,
+  M_RST5  = 0xd5,
+  M_RST6  = 0xd6,
+  M_RST7  = 0xd7,
+  
+  M_SOI   = 0xd8,
+  M_EOI   = 0xd9,
+  M_SOS   = 0xda,
+  M_DQT   = 0xdb,
+  M_DNL   = 0xdc,
+  M_DRI   = 0xdd,
+  M_DHP   = 0xde,
+  M_EXP   = 0xdf,
+  
+  M_APP0  = 0xe0,
+  M_APP1  = 0xe1,
+  M_APP2  = 0xe2,
+  M_APP3  = 0xe3,
+  M_APP4  = 0xe4,
+  M_APP5  = 0xe5,
+  M_APP6  = 0xe6,
+  M_APP7  = 0xe7,
+  M_APP8  = 0xe8,
+  M_APP9  = 0xe9,
+  M_APP10 = 0xea,
+  M_APP11 = 0xeb,
+  M_APP12 = 0xec,
+  M_APP13 = 0xed,
+  M_APP14 = 0xee,
+  M_APP15 = 0xef,
+  
+  M_JPG0  = 0xf0,
+  M_JPG13 = 0xfd,
+  M_COM   = 0xfe,
+  
+  M_TEM   = 0x01,
+  
+  M_ERROR = 0x100
+} JPEG_MARKER;
+
+
+/* Private state */
+
+typedef struct {
+  struct jpeg_marker_writer pub; /* public fields */
+
+  unsigned int last_restart_interval; /* last DRI value emitted; 0 after SOI */
+} my_marker_writer;
+
+typedef my_marker_writer * my_marker_ptr;
+
+
+/*
+ * Basic output routines.
+ *
+ * Note that we do not support suspension while writing a marker.
+ * Therefore, an application using suspension must ensure that there is
+ * enough buffer space for the initial markers (typ. 600-700 bytes) before
+ * calling jpeg_start_compress, and enough space to write the trailing EOI
+ * (a few bytes) before calling jpeg_finish_compress.  Multipass compression
+ * modes are not supported at all with suspension, so those two are the only
+ * points where markers will be written.
+ */
+
+LOCAL(void)
+emit_byte (j_compress_ptr cinfo, int val)
+/* Emit a byte */
+{
+  struct jpeg_destination_mgr * dest = cinfo->dest;
+
+  *(dest->next_output_byte)++ = (JOCTET) val;
+  if (--dest->free_in_buffer == 0) {
+    if (! (*dest->empty_output_buffer) (cinfo))
+      ERREXIT(cinfo, JERR_CANT_SUSPEND);
+  }
+}
+
+
+LOCAL(void)
+emit_marker (j_compress_ptr cinfo, JPEG_MARKER mark)
+/* Emit a marker code */
+{
+  emit_byte(cinfo, 0xFF);
+  emit_byte(cinfo, (int) mark);
+}
+
+
+LOCAL(void)
+emit_2bytes (j_compress_ptr cinfo, int value)
+/* Emit a 2-byte integer; these are always MSB first in JPEG files */
+{
+  emit_byte(cinfo, (value >> 8) & 0xFF);
+  emit_byte(cinfo, value & 0xFF);
+}
+
+
+/*
+ * Routines to write specific marker types.
+ */
+
+LOCAL(int)
+emit_dqt (j_compress_ptr cinfo, int index)
+/* Emit a DQT marker */
+/* Returns the precision used (0 = 8bits, 1 = 16bits) for baseline checking */
+{
+  JQUANT_TBL * qtbl = cinfo->quant_tbl_ptrs[index];
+  int prec;
+  int i;
+
+  if (qtbl == NULL)
+    ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, index);
+
+  prec = 0;
+  for (i = 0; i < DCTSIZE2; i++) {
+    if (qtbl->quantval[i] > 255)
+      prec = 1;
+  }
+
+  if (! qtbl->sent_table) {
+    emit_marker(cinfo, M_DQT);
+
+    emit_2bytes(cinfo, prec ? DCTSIZE2*2 + 1 + 2 : DCTSIZE2 + 1 + 2);
+
+    emit_byte(cinfo, index + (prec<<4));
+
+    for (i = 0; i < DCTSIZE2; i++) {
+      /* The table entries must be emitted in zigzag order. */
+      unsigned int qval = qtbl->quantval[jpeg_natural_order[i]];
+      if (prec)
+	emit_byte(cinfo, (int) (qval >> 8));
+      emit_byte(cinfo, (int) (qval & 0xFF));
+    }
+
+    qtbl->sent_table = TRUE;
+  }
+
+  return prec;
+}
+
+
+LOCAL(void)
+emit_dht (j_compress_ptr cinfo, int index, boolean is_ac)
+/* Emit a DHT marker */
+{
+  JHUFF_TBL * htbl;
+  int length, i;
+  
+  if (is_ac) {
+    htbl = cinfo->ac_huff_tbl_ptrs[index];
+    index += 0x10;		/* output index has AC bit set */
+  } else {
+    htbl = cinfo->dc_huff_tbl_ptrs[index];
+  }
+
+  if (htbl == NULL)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, index);
+  
+  if (! htbl->sent_table) {
+    emit_marker(cinfo, M_DHT);
+    
+    length = 0;
+    for (i = 1; i <= 16; i++)
+      length += htbl->bits[i];
+    
+    emit_2bytes(cinfo, length + 2 + 1 + 16);
+    emit_byte(cinfo, index);
+    
+    for (i = 1; i <= 16; i++)
+      emit_byte(cinfo, htbl->bits[i]);
+    
+    for (i = 0; i < length; i++)
+      emit_byte(cinfo, htbl->huffval[i]);
+    
+    htbl->sent_table = TRUE;
+  }
+}
+
+
+LOCAL(void)
+emit_dac (j_compress_ptr cinfo)
+/* Emit a DAC marker */
+/* Since the useful info is so small, we want to emit all the tables in */
+/* one DAC marker.  Therefore this routine does its own scan of the table. */
+{
+#ifdef C_ARITH_CODING_SUPPORTED
+  char dc_in_use[NUM_ARITH_TBLS];
+  char ac_in_use[NUM_ARITH_TBLS];
+  int length, i;
+  jpeg_component_info *compptr;
+  
+  for (i = 0; i < NUM_ARITH_TBLS; i++)
+    dc_in_use[i] = ac_in_use[i] = 0;
+  
+  for (i = 0; i < cinfo->comps_in_scan; i++) {
+    compptr = cinfo->cur_comp_info[i];
+    dc_in_use[compptr->dc_tbl_no] = 1;
+    ac_in_use[compptr->ac_tbl_no] = 1;
+  }
+  
+  length = 0;
+  for (i = 0; i < NUM_ARITH_TBLS; i++)
+    length += dc_in_use[i] + ac_in_use[i];
+  
+  emit_marker(cinfo, M_DAC);
+  
+  emit_2bytes(cinfo, length*2 + 2);
+  
+  for (i = 0; i < NUM_ARITH_TBLS; i++) {
+    if (dc_in_use[i]) {
+      emit_byte(cinfo, i);
+      emit_byte(cinfo, cinfo->arith_dc_L[i] + (cinfo->arith_dc_U[i]<<4));
+    }
+    if (ac_in_use[i]) {
+      emit_byte(cinfo, i + 0x10);
+      emit_byte(cinfo, cinfo->arith_ac_K[i]);
+    }
+  }
+#endif /* C_ARITH_CODING_SUPPORTED */
+}
+
+
+LOCAL(void)
+emit_dri (j_compress_ptr cinfo)
+/* Emit a DRI marker */
+{
+  emit_marker(cinfo, M_DRI);
+  
+  emit_2bytes(cinfo, 4);	/* fixed length */
+
+  emit_2bytes(cinfo, (int) cinfo->restart_interval);
+}
+
+
+LOCAL(void)
+emit_sof (j_compress_ptr cinfo, JPEG_MARKER code)
+/* Emit a SOF marker */
+{
+  int ci;
+  jpeg_component_info *compptr;
+  
+  emit_marker(cinfo, code);
+  
+  emit_2bytes(cinfo, 3 * cinfo->num_components + 2 + 5 + 1); /* length */
+
+  /* Make sure image isn't bigger than SOF field can handle */
+  if ((long) cinfo->image_height > 65535L ||
+      (long) cinfo->image_width > 65535L)
+    ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) 65535);
+
+  emit_byte(cinfo, cinfo->data_precision);
+  emit_2bytes(cinfo, (int) cinfo->image_height);
+  emit_2bytes(cinfo, (int) cinfo->image_width);
+
+  emit_byte(cinfo, cinfo->num_components);
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    emit_byte(cinfo, compptr->component_id);
+    emit_byte(cinfo, (compptr->h_samp_factor << 4) + compptr->v_samp_factor);
+    emit_byte(cinfo, compptr->quant_tbl_no);
+  }
+}
+
+
+LOCAL(void)
+emit_sos (j_compress_ptr cinfo)
+/* Emit a SOS marker */
+{
+  int i, td, ta;
+  jpeg_component_info *compptr;
+  
+  emit_marker(cinfo, M_SOS);
+  
+  emit_2bytes(cinfo, 2 * cinfo->comps_in_scan + 2 + 1 + 3); /* length */
+  
+  emit_byte(cinfo, cinfo->comps_in_scan);
+  
+  for (i = 0; i < cinfo->comps_in_scan; i++) {
+    compptr = cinfo->cur_comp_info[i];
+    emit_byte(cinfo, compptr->component_id);
+    td = compptr->dc_tbl_no;
+    ta = compptr->ac_tbl_no;
+    if (cinfo->progressive_mode) {
+      /* Progressive mode: only DC or only AC tables are used in one scan;
+       * furthermore, Huffman coding of DC refinement uses no table at all.
+       * We emit 0 for unused field(s); this is recommended by the P&M text
+       * but does not seem to be specified in the standard.
+       */
+      if (cinfo->Ss == 0) {
+	ta = 0;			/* DC scan */
+	if (cinfo->Ah != 0 && !cinfo->arith_code)
+	  td = 0;		/* no DC table either */
+      } else {
+	td = 0;			/* AC scan */
+      }
+    }
+    emit_byte(cinfo, (td << 4) + ta);
+  }
+
+  emit_byte(cinfo, cinfo->Ss);
+  emit_byte(cinfo, cinfo->Se);
+  emit_byte(cinfo, (cinfo->Ah << 4) + cinfo->Al);
+}
+
+
+LOCAL(void)
+emit_jfif_app0 (j_compress_ptr cinfo)
+/* Emit a JFIF-compliant APP0 marker */
+{
+  /*
+   * Length of APP0 block	(2 bytes)
+   * Block ID			(4 bytes - ASCII "JFIF")
+   * Zero byte			(1 byte to terminate the ID string)
+   * Version Major, Minor	(2 bytes - major first)
+   * Units			(1 byte - 0x00 = none, 0x01 = inch, 0x02 = cm)
+   * Xdpu			(2 bytes - dots per unit horizontal)
+   * Ydpu			(2 bytes - dots per unit vertical)
+   * Thumbnail X size		(1 byte)
+   * Thumbnail Y size		(1 byte)
+   */
+  
+  emit_marker(cinfo, M_APP0);
+  
+  emit_2bytes(cinfo, 2 + 4 + 1 + 2 + 1 + 2 + 2 + 1 + 1); /* length */
+
+  emit_byte(cinfo, 0x4A);	/* Identifier: ASCII "JFIF" */
+  emit_byte(cinfo, 0x46);
+  emit_byte(cinfo, 0x49);
+  emit_byte(cinfo, 0x46);
+  emit_byte(cinfo, 0);
+  emit_byte(cinfo, cinfo->JFIF_major_version); /* Version fields */
+  emit_byte(cinfo, cinfo->JFIF_minor_version);
+  emit_byte(cinfo, cinfo->density_unit); /* Pixel size information */
+  emit_2bytes(cinfo, (int) cinfo->X_density);
+  emit_2bytes(cinfo, (int) cinfo->Y_density);
+  emit_byte(cinfo, 0);		/* No thumbnail image */
+  emit_byte(cinfo, 0);
+}
+
+
+LOCAL(void)
+emit_adobe_app14 (j_compress_ptr cinfo)
+/* Emit an Adobe APP14 marker */
+{
+  /*
+   * Length of APP14 block	(2 bytes)
+   * Block ID			(5 bytes - ASCII "Adobe")
+   * Version Number		(2 bytes - currently 100)
+   * Flags0			(2 bytes - currently 0)
+   * Flags1			(2 bytes - currently 0)
+   * Color transform		(1 byte)
+   *
+   * Although Adobe TN 5116 mentions Version = 101, all the Adobe files
+   * now in circulation seem to use Version = 100, so that's what we write.
+   *
+   * We write the color transform byte as 1 if the JPEG color space is
+   * YCbCr, 2 if it's YCCK, 0 otherwise.  Adobe's definition has to do with
+   * whether the encoder performed a transformation, which is pretty useless.
+   */
+  
+  emit_marker(cinfo, M_APP14);
+  
+  emit_2bytes(cinfo, 2 + 5 + 2 + 2 + 2 + 1); /* length */
+
+  emit_byte(cinfo, 0x41);	/* Identifier: ASCII "Adobe" */
+  emit_byte(cinfo, 0x64);
+  emit_byte(cinfo, 0x6F);
+  emit_byte(cinfo, 0x62);
+  emit_byte(cinfo, 0x65);
+  emit_2bytes(cinfo, 100);	/* Version */
+  emit_2bytes(cinfo, 0);	/* Flags0 */
+  emit_2bytes(cinfo, 0);	/* Flags1 */
+  switch (cinfo->jpeg_color_space) {
+  case JCS_YCbCr:
+    emit_byte(cinfo, 1);	/* Color transform = 1 */
+    break;
+  case JCS_YCCK:
+    emit_byte(cinfo, 2);	/* Color transform = 2 */
+    break;
+  default:
+    emit_byte(cinfo, 0);	/* Color transform = 0 */
+    break;
+  }
+}
+
+
+/*
+ * These routines allow writing an arbitrary marker with parameters.
+ * The only intended use is to emit COM or APPn markers after calling
+ * write_file_header and before calling write_frame_header.
+ * Other uses are not guaranteed to produce desirable results.
+ * Counting the parameter bytes properly is the caller's responsibility.
+ */
+
+METHODDEF(void)
+write_marker_header (j_compress_ptr cinfo, int marker, unsigned int datalen)
+/* Emit an arbitrary marker header */
+{
+  if (datalen > (unsigned int) 65533)		/* safety check */
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
+  emit_marker(cinfo, (JPEG_MARKER) marker);
+
+  emit_2bytes(cinfo, (int) (datalen + 2));	/* total length */
+}
+
+METHODDEF(void)
+write_marker_byte (j_compress_ptr cinfo, int val)
+/* Emit one byte of marker parameters following write_marker_header */
+{
+  emit_byte(cinfo, val);
+}
+
+
+/*
+ * Write datastream header.
+ * This consists of an SOI and optional APPn markers.
+ * We recommend use of the JFIF marker, but not the Adobe marker,
+ * when using YCbCr or grayscale data.  The JFIF marker should NOT
+ * be used for any other JPEG colorspace.  The Adobe marker is helpful
+ * to distinguish RGB, CMYK, and YCCK colorspaces.
+ * Note that an application can write additional header markers after
+ * jpeg_start_compress returns.
+ */
+
+METHODDEF(void)
+write_file_header (j_compress_ptr cinfo)
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+
+  emit_marker(cinfo, M_SOI);	/* first the SOI */
+
+  /* SOI is defined to reset restart interval to 0 */
+  marker->last_restart_interval = 0;
+
+  if (cinfo->write_JFIF_header)	/* next an optional JFIF APP0 */
+    emit_jfif_app0(cinfo);
+  if (cinfo->write_Adobe_marker) /* next an optional Adobe APP14 */
+    emit_adobe_app14(cinfo);
+}
+
+
+/*
+ * Write frame header.
+ * This consists of DQT and SOFn markers.
+ * Note that we do not emit the SOF until we have emitted the DQT(s).
+ * This avoids compatibility problems with incorrect implementations that
+ * try to error-check the quant table numbers as soon as they see the SOF.
+ */
+
+METHODDEF(void)
+write_frame_header (j_compress_ptr cinfo)
+{
+  int ci, prec;
+  boolean is_baseline;
+  jpeg_component_info *compptr;
+  
+  /* Emit DQT for each quantization table.
+   * Note that emit_dqt() suppresses any duplicate tables.
+   */
+  prec = 0;
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    prec += emit_dqt(cinfo, compptr->quant_tbl_no);
+  }
+  /* now prec is nonzero iff there are any 16-bit quant tables. */
+
+  /* Check for a non-baseline specification.
+   * Note we assume that Huffman table numbers won't be changed later.
+   */
+  if (cinfo->arith_code || cinfo->progressive_mode ||
+      cinfo->data_precision != 8) {
+    is_baseline = FALSE;
+  } else {
+    is_baseline = TRUE;
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	 ci++, compptr++) {
+      if (compptr->dc_tbl_no > 1 || compptr->ac_tbl_no > 1)
+	is_baseline = FALSE;
+    }
+    if (prec && is_baseline) {
+      is_baseline = FALSE;
+      /* If it's baseline except for quantizer size, warn the user */
+      TRACEMS(cinfo, 0, JTRC_16BIT_TABLES);
+    }
+  }
+
+  /* Emit the proper SOF marker */
+  if (cinfo->arith_code) {
+    emit_sof(cinfo, M_SOF9);	/* SOF code for arithmetic coding */
+  } else {
+    if (cinfo->progressive_mode)
+      emit_sof(cinfo, M_SOF2);	/* SOF code for progressive Huffman */
+    else if (is_baseline)
+      emit_sof(cinfo, M_SOF0);	/* SOF code for baseline implementation */
+    else
+      emit_sof(cinfo, M_SOF1);	/* SOF code for non-baseline Huffman file */
+  }
+}
+
+
+/*
+ * Write scan header.
+ * This consists of DHT or DAC markers, optional DRI, and SOS.
+ * Compressed data will be written following the SOS.
+ */
+
+METHODDEF(void)
+write_scan_header (j_compress_ptr cinfo)
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+  int i;
+  jpeg_component_info *compptr;
+
+  if (cinfo->arith_code) {
+    /* Emit arith conditioning info.  We may have some duplication
+     * if the file has multiple scans, but it's so small it's hardly
+     * worth worrying about.
+     */
+    emit_dac(cinfo);
+  } else {
+    /* Emit Huffman tables.
+     * Note that emit_dht() suppresses any duplicate tables.
+     */
+    for (i = 0; i < cinfo->comps_in_scan; i++) {
+      compptr = cinfo->cur_comp_info[i];
+      if (cinfo->progressive_mode) {
+	/* Progressive mode: only DC or only AC tables are used in one scan */
+	if (cinfo->Ss == 0) {
+	  if (cinfo->Ah == 0)	/* DC needs no table for refinement scan */
+	    emit_dht(cinfo, compptr->dc_tbl_no, FALSE);
+	} else {
+	  emit_dht(cinfo, compptr->ac_tbl_no, TRUE);
+	}
+      } else {
+	/* Sequential mode: need both DC and AC tables */
+	emit_dht(cinfo, compptr->dc_tbl_no, FALSE);
+	emit_dht(cinfo, compptr->ac_tbl_no, TRUE);
+      }
+    }
+  }
+
+  /* Emit DRI if required --- note that DRI value could change for each scan.
+   * We avoid wasting space with unnecessary DRIs, however.
+   */
+  if (cinfo->restart_interval != marker->last_restart_interval) {
+    emit_dri(cinfo);
+    marker->last_restart_interval = cinfo->restart_interval;
+  }
+
+  emit_sos(cinfo);
+}
+
+
+/*
+ * Write datastream trailer.
+ */
+
+METHODDEF(void)
+write_file_trailer (j_compress_ptr cinfo)
+{
+  emit_marker(cinfo, M_EOI);
+}
+
+
+/*
+ * Write an abbreviated table-specification datastream.
+ * This consists of SOI, DQT and DHT tables, and EOI.
+ * Any table that is defined and not marked sent_table = TRUE will be
+ * emitted.  Note that all tables will be marked sent_table = TRUE at exit.
+ */
+
+METHODDEF(void)
+write_tables_only (j_compress_ptr cinfo)
+{
+  int i;
+
+  emit_marker(cinfo, M_SOI);
+
+  for (i = 0; i < NUM_QUANT_TBLS; i++) {
+    if (cinfo->quant_tbl_ptrs[i] != NULL)
+      (void) emit_dqt(cinfo, i);
+  }
+
+  if (! cinfo->arith_code) {
+    for (i = 0; i < NUM_HUFF_TBLS; i++) {
+      if (cinfo->dc_huff_tbl_ptrs[i] != NULL)
+	emit_dht(cinfo, i, FALSE);
+      if (cinfo->ac_huff_tbl_ptrs[i] != NULL)
+	emit_dht(cinfo, i, TRUE);
+    }
+  }
+
+  emit_marker(cinfo, M_EOI);
+}
+
+
+/*
+ * Initialize the marker writer module.
+ */
+
+GLOBAL(void)
+jinit_marker_writer (j_compress_ptr cinfo)
+{
+  my_marker_ptr marker;
+
+  /* Create the subobject */
+  marker = (my_marker_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_marker_writer));
+  cinfo->marker = (struct jpeg_marker_writer *) marker;
+  /* Initialize method pointers */
+  marker->pub.write_file_header = write_file_header;
+  marker->pub.write_frame_header = write_frame_header;
+  marker->pub.write_scan_header = write_scan_header;
+  marker->pub.write_file_trailer = write_file_trailer;
+  marker->pub.write_tables_only = write_tables_only;
+  marker->pub.write_marker_header = write_marker_header;
+  marker->pub.write_marker_byte = write_marker_byte;
+  /* Initialize private state */
+  marker->last_restart_interval = 0;
+}
diff --git a/common/jpeg/jcmaster.c b/common/jpeg/jcmaster.c
new file mode 100644
index 00000000..aab4020b
--- /dev/null
+++ b/common/jpeg/jcmaster.c
@@ -0,0 +1,590 @@
+/*
+ * jcmaster.c
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains master control logic for the JPEG compressor.
+ * These routines are concerned with parameter validation, initial setup,
+ * and inter-pass control (determining the number of passes and the work 
+ * to be done in each pass).
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Private state */
+
+typedef enum {
+	main_pass,		/* input data, also do first output step */
+	huff_opt_pass,		/* Huffman code optimization pass */
+	output_pass		/* data output pass */
+} c_pass_type;
+
+typedef struct {
+  struct jpeg_comp_master pub;	/* public fields */
+
+  c_pass_type pass_type;	/* the type of the current pass */
+
+  int pass_number;		/* # of passes completed */
+  int total_passes;		/* total # of passes needed */
+
+  int scan_number;		/* current index in scan_info[] */
+} my_comp_master;
+
+typedef my_comp_master * my_master_ptr;
+
+
+/*
+ * Support routines that do various essential calculations.
+ */
+
+LOCAL(void)
+initial_setup (j_compress_ptr cinfo)
+/* Do computations that are needed before master selection phase */
+{
+  int ci;
+  jpeg_component_info *compptr;
+  long samplesperrow;
+  JDIMENSION jd_samplesperrow;
+
+  /* Sanity check on image dimensions */
+  if (cinfo->image_height <= 0 || cinfo->image_width <= 0
+      || cinfo->num_components <= 0 || cinfo->input_components <= 0)
+    ERREXIT(cinfo, JERR_EMPTY_IMAGE);
+
+  /* Make sure image isn't bigger than I can handle */
+  if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION ||
+      (long) cinfo->image_width > (long) JPEG_MAX_DIMENSION)
+    ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION);
+
+  /* Width of an input scanline must be representable as JDIMENSION. */
+  samplesperrow = (long) cinfo->image_width * (long) cinfo->input_components;
+  jd_samplesperrow = (JDIMENSION) samplesperrow;
+  if ((long) jd_samplesperrow != samplesperrow)
+    ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
+
+  /* For now, precision must match compiled-in value... */
+  if (cinfo->data_precision != BITS_IN_JSAMPLE)
+    ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
+
+  /* Check that number of components won't exceed internal array sizes */
+  if (cinfo->num_components > MAX_COMPONENTS)
+    ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
+	     MAX_COMPONENTS);
+
+  /* Compute maximum sampling factors; check factor validity */
+  cinfo->max_h_samp_factor = 1;
+  cinfo->max_v_samp_factor = 1;
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR ||
+	compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR)
+      ERREXIT(cinfo, JERR_BAD_SAMPLING);
+    cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor,
+				   compptr->h_samp_factor);
+    cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor,
+				   compptr->v_samp_factor);
+  }
+
+  /* Compute dimensions of components */
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Fill in the correct component_index value; don't rely on application */
+    compptr->component_index = ci;
+    /* For compression, we never do DCT scaling. */
+    compptr->DCT_scaled_size = DCTSIZE;
+    /* Size in DCT blocks */
+    compptr->width_in_blocks = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor,
+		    (long) (cinfo->max_h_samp_factor * DCTSIZE));
+    compptr->height_in_blocks = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor,
+		    (long) (cinfo->max_v_samp_factor * DCTSIZE));
+    /* Size in samples */
+    compptr->downsampled_width = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor,
+		    (long) cinfo->max_h_samp_factor);
+    compptr->downsampled_height = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor,
+		    (long) cinfo->max_v_samp_factor);
+    /* Mark component needed (this flag isn't actually used for compression) */
+    compptr->component_needed = TRUE;
+  }
+
+  /* Compute number of fully interleaved MCU rows (number of times that
+   * main controller will call coefficient controller).
+   */
+  cinfo->total_iMCU_rows = (JDIMENSION)
+    jdiv_round_up((long) cinfo->image_height,
+		  (long) (cinfo->max_v_samp_factor*DCTSIZE));
+}
+
+
+#ifdef C_MULTISCAN_FILES_SUPPORTED
+
+LOCAL(void)
+validate_script (j_compress_ptr cinfo)
+/* Verify that the scan script in cinfo->scan_info[] is valid; also
+ * determine whether it uses progressive JPEG, and set cinfo->progressive_mode.
+ */
+{
+  const jpeg_scan_info * scanptr;
+  int scanno, ncomps, ci, coefi, thisi;
+  int Ss, Se, Ah, Al;
+  boolean component_sent[MAX_COMPONENTS];
+#ifdef C_PROGRESSIVE_SUPPORTED
+  int * last_bitpos_ptr;
+  int last_bitpos[MAX_COMPONENTS][DCTSIZE2];
+  /* -1 until that coefficient has been seen; then last Al for it */
+#endif
+
+  if (cinfo->num_scans <= 0)
+    ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, 0);
+
+  /* For sequential JPEG, all scans must have Ss=0, Se=DCTSIZE2-1;
+   * for progressive JPEG, no scan can have this.
+   */
+  scanptr = cinfo->scan_info;
+  if (scanptr->Ss != 0 || scanptr->Se != DCTSIZE2-1) {
+#ifdef C_PROGRESSIVE_SUPPORTED
+    cinfo->progressive_mode = TRUE;
+    last_bitpos_ptr = & last_bitpos[0][0];
+    for (ci = 0; ci < cinfo->num_components; ci++) 
+      for (coefi = 0; coefi < DCTSIZE2; coefi++)
+	*last_bitpos_ptr++ = -1;
+#else
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+  } else {
+    cinfo->progressive_mode = FALSE;
+    for (ci = 0; ci < cinfo->num_components; ci++) 
+      component_sent[ci] = FALSE;
+  }
+
+  for (scanno = 1; scanno <= cinfo->num_scans; scanptr++, scanno++) {
+    /* Validate component indexes */
+    ncomps = scanptr->comps_in_scan;
+    if (ncomps <= 0 || ncomps > MAX_COMPS_IN_SCAN)
+      ERREXIT2(cinfo, JERR_COMPONENT_COUNT, ncomps, MAX_COMPS_IN_SCAN);
+    for (ci = 0; ci < ncomps; ci++) {
+      thisi = scanptr->component_index[ci];
+      if (thisi < 0 || thisi >= cinfo->num_components)
+	ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno);
+      /* Components must appear in SOF order within each scan */
+      if (ci > 0 && thisi <= scanptr->component_index[ci-1])
+	ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno);
+    }
+    /* Validate progression parameters */
+    Ss = scanptr->Ss;
+    Se = scanptr->Se;
+    Ah = scanptr->Ah;
+    Al = scanptr->Al;
+    if (cinfo->progressive_mode) {
+#ifdef C_PROGRESSIVE_SUPPORTED
+      /* The JPEG spec simply gives the ranges 0..13 for Ah and Al, but that
+       * seems wrong: the upper bound ought to depend on data precision.
+       * Perhaps they really meant 0..N+1 for N-bit precision.
+       * Here we allow 0..10 for 8-bit data; Al larger than 10 results in
+       * out-of-range reconstructed DC values during the first DC scan,
+       * which might cause problems for some decoders.
+       */
+#if BITS_IN_JSAMPLE == 8
+#define MAX_AH_AL 10
+#else
+#define MAX_AH_AL 13
+#endif
+      if (Ss < 0 || Ss >= DCTSIZE2 || Se < Ss || Se >= DCTSIZE2 ||
+	  Ah < 0 || Ah > MAX_AH_AL || Al < 0 || Al > MAX_AH_AL)
+	ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
+      if (Ss == 0) {
+	if (Se != 0)		/* DC and AC together not OK */
+	  ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
+      } else {
+	if (ncomps != 1)	/* AC scans must be for only one component */
+	  ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
+      }
+      for (ci = 0; ci < ncomps; ci++) {
+	last_bitpos_ptr = & last_bitpos[scanptr->component_index[ci]][0];
+	if (Ss != 0 && last_bitpos_ptr[0] < 0) /* AC without prior DC scan */
+	  ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
+	for (coefi = Ss; coefi <= Se; coefi++) {
+	  if (last_bitpos_ptr[coefi] < 0) {
+	    /* first scan of this coefficient */
+	    if (Ah != 0)
+	      ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
+	  } else {
+	    /* not first scan */
+	    if (Ah != last_bitpos_ptr[coefi] || Al != Ah-1)
+	      ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
+	  }
+	  last_bitpos_ptr[coefi] = Al;
+	}
+      }
+#endif
+    } else {
+      /* For sequential JPEG, all progression parameters must be these: */
+      if (Ss != 0 || Se != DCTSIZE2-1 || Ah != 0 || Al != 0)
+	ERREXIT1(cinfo, JERR_BAD_PROG_SCRIPT, scanno);
+      /* Make sure components are not sent twice */
+      for (ci = 0; ci < ncomps; ci++) {
+	thisi = scanptr->component_index[ci];
+	if (component_sent[thisi])
+	  ERREXIT1(cinfo, JERR_BAD_SCAN_SCRIPT, scanno);
+	component_sent[thisi] = TRUE;
+      }
+    }
+  }
+
+  /* Now verify that everything got sent. */
+  if (cinfo->progressive_mode) {
+#ifdef C_PROGRESSIVE_SUPPORTED
+    /* For progressive mode, we only check that at least some DC data
+     * got sent for each component; the spec does not require that all bits
+     * of all coefficients be transmitted.  Would it be wiser to enforce
+     * transmission of all coefficient bits??
+     */
+    for (ci = 0; ci < cinfo->num_components; ci++) {
+      if (last_bitpos[ci][0] < 0)
+	ERREXIT(cinfo, JERR_MISSING_DATA);
+    }
+#endif
+  } else {
+    for (ci = 0; ci < cinfo->num_components; ci++) {
+      if (! component_sent[ci])
+	ERREXIT(cinfo, JERR_MISSING_DATA);
+    }
+  }
+}
+
+#endif /* C_MULTISCAN_FILES_SUPPORTED */
+
+
+LOCAL(void)
+select_scan_parameters (j_compress_ptr cinfo)
+/* Set up the scan parameters for the current scan */
+{
+  int ci;
+
+#ifdef C_MULTISCAN_FILES_SUPPORTED
+  if (cinfo->scan_info != NULL) {
+    /* Prepare for current scan --- the script is already validated */
+    my_master_ptr master = (my_master_ptr) cinfo->master;
+    const jpeg_scan_info * scanptr = cinfo->scan_info + master->scan_number;
+
+    cinfo->comps_in_scan = scanptr->comps_in_scan;
+    for (ci = 0; ci < scanptr->comps_in_scan; ci++) {
+      cinfo->cur_comp_info[ci] =
+	&cinfo->comp_info[scanptr->component_index[ci]];
+    }
+    cinfo->Ss = scanptr->Ss;
+    cinfo->Se = scanptr->Se;
+    cinfo->Ah = scanptr->Ah;
+    cinfo->Al = scanptr->Al;
+  }
+  else
+#endif
+  {
+    /* Prepare for single sequential-JPEG scan containing all components */
+    if (cinfo->num_components > MAX_COMPS_IN_SCAN)
+      ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
+	       MAX_COMPS_IN_SCAN);
+    cinfo->comps_in_scan = cinfo->num_components;
+    for (ci = 0; ci < cinfo->num_components; ci++) {
+      cinfo->cur_comp_info[ci] = &cinfo->comp_info[ci];
+    }
+    cinfo->Ss = 0;
+    cinfo->Se = DCTSIZE2-1;
+    cinfo->Ah = 0;
+    cinfo->Al = 0;
+  }
+}
+
+
+LOCAL(void)
+per_scan_setup (j_compress_ptr cinfo)
+/* Do computations that are needed before processing a JPEG scan */
+/* cinfo->comps_in_scan and cinfo->cur_comp_info[] are already set */
+{
+  int ci, mcublks, tmp;
+  jpeg_component_info *compptr;
+  
+  if (cinfo->comps_in_scan == 1) {
+    
+    /* Noninterleaved (single-component) scan */
+    compptr = cinfo->cur_comp_info[0];
+    
+    /* Overall image size in MCUs */
+    cinfo->MCUs_per_row = compptr->width_in_blocks;
+    cinfo->MCU_rows_in_scan = compptr->height_in_blocks;
+    
+    /* For noninterleaved scan, always one block per MCU */
+    compptr->MCU_width = 1;
+    compptr->MCU_height = 1;
+    compptr->MCU_blocks = 1;
+    compptr->MCU_sample_width = DCTSIZE;
+    compptr->last_col_width = 1;
+    /* For noninterleaved scans, it is convenient to define last_row_height
+     * as the number of block rows present in the last iMCU row.
+     */
+    tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
+    if (tmp == 0) tmp = compptr->v_samp_factor;
+    compptr->last_row_height = tmp;
+    
+    /* Prepare array describing MCU composition */
+    cinfo->blocks_in_MCU = 1;
+    cinfo->MCU_membership[0] = 0;
+    
+  } else {
+    
+    /* Interleaved (multi-component) scan */
+    if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN)
+      ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan,
+	       MAX_COMPS_IN_SCAN);
+    
+    /* Overall image size in MCUs */
+    cinfo->MCUs_per_row = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width,
+		    (long) (cinfo->max_h_samp_factor*DCTSIZE));
+    cinfo->MCU_rows_in_scan = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height,
+		    (long) (cinfo->max_v_samp_factor*DCTSIZE));
+    
+    cinfo->blocks_in_MCU = 0;
+    
+    for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+      compptr = cinfo->cur_comp_info[ci];
+      /* Sampling factors give # of blocks of component in each MCU */
+      compptr->MCU_width = compptr->h_samp_factor;
+      compptr->MCU_height = compptr->v_samp_factor;
+      compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height;
+      compptr->MCU_sample_width = compptr->MCU_width * DCTSIZE;
+      /* Figure number of non-dummy blocks in last MCU column & row */
+      tmp = (int) (compptr->width_in_blocks % compptr->MCU_width);
+      if (tmp == 0) tmp = compptr->MCU_width;
+      compptr->last_col_width = tmp;
+      tmp = (int) (compptr->height_in_blocks % compptr->MCU_height);
+      if (tmp == 0) tmp = compptr->MCU_height;
+      compptr->last_row_height = tmp;
+      /* Prepare array describing MCU composition */
+      mcublks = compptr->MCU_blocks;
+      if (cinfo->blocks_in_MCU + mcublks > C_MAX_BLOCKS_IN_MCU)
+	ERREXIT(cinfo, JERR_BAD_MCU_SIZE);
+      while (mcublks-- > 0) {
+	cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci;
+      }
+    }
+    
+  }
+
+  /* Convert restart specified in rows to actual MCU count. */
+  /* Note that count must fit in 16 bits, so we provide limiting. */
+  if (cinfo->restart_in_rows > 0) {
+    long nominal = (long) cinfo->restart_in_rows * (long) cinfo->MCUs_per_row;
+    cinfo->restart_interval = (unsigned int) MIN(nominal, 65535L);
+  }
+}
+
+
+/*
+ * Per-pass setup.
+ * This is called at the beginning of each pass.  We determine which modules
+ * will be active during this pass and give them appropriate start_pass calls.
+ * We also set is_last_pass to indicate whether any more passes will be
+ * required.
+ */
+
+METHODDEF(void)
+prepare_for_pass (j_compress_ptr cinfo)
+{
+  my_master_ptr master = (my_master_ptr) cinfo->master;
+
+  switch (master->pass_type) {
+  case main_pass:
+    /* Initial pass: will collect input data, and do either Huffman
+     * optimization or data output for the first scan.
+     */
+    select_scan_parameters(cinfo);
+    per_scan_setup(cinfo);
+    if (! cinfo->raw_data_in) {
+      (*cinfo->cconvert->start_pass) (cinfo);
+      (*cinfo->downsample->start_pass) (cinfo);
+      (*cinfo->prep->start_pass) (cinfo, JBUF_PASS_THRU);
+    }
+    (*cinfo->fdct->start_pass) (cinfo);
+    (*cinfo->entropy->start_pass) (cinfo, cinfo->optimize_coding);
+    (*cinfo->coef->start_pass) (cinfo,
+				(master->total_passes > 1 ?
+				 JBUF_SAVE_AND_PASS : JBUF_PASS_THRU));
+    (*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU);
+    if (cinfo->optimize_coding) {
+      /* No immediate data output; postpone writing frame/scan headers */
+      master->pub.call_pass_startup = FALSE;
+    } else {
+      /* Will write frame/scan headers at first jpeg_write_scanlines call */
+      master->pub.call_pass_startup = TRUE;
+    }
+    break;
+#ifdef ENTROPY_OPT_SUPPORTED
+  case huff_opt_pass:
+    /* Do Huffman optimization for a scan after the first one. */
+    select_scan_parameters(cinfo);
+    per_scan_setup(cinfo);
+    if (cinfo->Ss != 0 || cinfo->Ah == 0 || cinfo->arith_code) {
+      (*cinfo->entropy->start_pass) (cinfo, TRUE);
+      (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST);
+      master->pub.call_pass_startup = FALSE;
+      break;
+    }
+    /* Special case: Huffman DC refinement scans need no Huffman table
+     * and therefore we can skip the optimization pass for them.
+     */
+    master->pass_type = output_pass;
+    master->pass_number++;
+    /*FALLTHROUGH*/
+#endif
+  case output_pass:
+    /* Do a data-output pass. */
+    /* We need not repeat per-scan setup if prior optimization pass did it. */
+    if (! cinfo->optimize_coding) {
+      select_scan_parameters(cinfo);
+      per_scan_setup(cinfo);
+    }
+    (*cinfo->entropy->start_pass) (cinfo, FALSE);
+    (*cinfo->coef->start_pass) (cinfo, JBUF_CRANK_DEST);
+    /* We emit frame/scan headers now */
+    if (master->scan_number == 0)
+      (*cinfo->marker->write_frame_header) (cinfo);
+    (*cinfo->marker->write_scan_header) (cinfo);
+    master->pub.call_pass_startup = FALSE;
+    break;
+  default:
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+  }
+
+  master->pub.is_last_pass = (master->pass_number == master->total_passes-1);
+
+  /* Set up progress monitor's pass info if present */
+  if (cinfo->progress != NULL) {
+    cinfo->progress->completed_passes = master->pass_number;
+    cinfo->progress->total_passes = master->total_passes;
+  }
+}
+
+
+/*
+ * Special start-of-pass hook.
+ * This is called by jpeg_write_scanlines if call_pass_startup is TRUE.
+ * In single-pass processing, we need this hook because we don't want to
+ * write frame/scan headers during jpeg_start_compress; we want to let the
+ * application write COM markers etc. between jpeg_start_compress and the
+ * jpeg_write_scanlines loop.
+ * In multi-pass processing, this routine is not used.
+ */
+
+METHODDEF(void)
+pass_startup (j_compress_ptr cinfo)
+{
+  cinfo->master->call_pass_startup = FALSE; /* reset flag so call only once */
+
+  (*cinfo->marker->write_frame_header) (cinfo);
+  (*cinfo->marker->write_scan_header) (cinfo);
+}
+
+
+/*
+ * Finish up at end of pass.
+ */
+
+METHODDEF(void)
+finish_pass_master (j_compress_ptr cinfo)
+{
+  my_master_ptr master = (my_master_ptr) cinfo->master;
+
+  /* The entropy coder always needs an end-of-pass call,
+   * either to analyze statistics or to flush its output buffer.
+   */
+  (*cinfo->entropy->finish_pass) (cinfo);
+
+  /* Update state for next pass */
+  switch (master->pass_type) {
+  case main_pass:
+    /* next pass is either output of scan 0 (after optimization)
+     * or output of scan 1 (if no optimization).
+     */
+    master->pass_type = output_pass;
+    if (! cinfo->optimize_coding)
+      master->scan_number++;
+    break;
+  case huff_opt_pass:
+    /* next pass is always output of current scan */
+    master->pass_type = output_pass;
+    break;
+  case output_pass:
+    /* next pass is either optimization or output of next scan */
+    if (cinfo->optimize_coding)
+      master->pass_type = huff_opt_pass;
+    master->scan_number++;
+    break;
+  }
+
+  master->pass_number++;
+}
+
+
+/*
+ * Initialize master compression control.
+ */
+
+GLOBAL(void)
+jinit_c_master_control (j_compress_ptr cinfo, boolean transcode_only)
+{
+  my_master_ptr master;
+
+  master = (my_master_ptr)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  SIZEOF(my_comp_master));
+  cinfo->master = (struct jpeg_comp_master *) master;
+  master->pub.prepare_for_pass = prepare_for_pass;
+  master->pub.pass_startup = pass_startup;
+  master->pub.finish_pass = finish_pass_master;
+  master->pub.is_last_pass = FALSE;
+
+  /* Validate parameters, determine derived values */
+  initial_setup(cinfo);
+
+  if (cinfo->scan_info != NULL) {
+#ifdef C_MULTISCAN_FILES_SUPPORTED
+    validate_script(cinfo);
+#else
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+  } else {
+    cinfo->progressive_mode = FALSE;
+    cinfo->num_scans = 1;
+  }
+
+  if (cinfo->progressive_mode)	/*  TEMPORARY HACK ??? */
+    cinfo->optimize_coding = TRUE; /* assume default tables no good for progressive mode */
+
+  /* Initialize my private state */
+  if (transcode_only) {
+    /* no main pass in transcoding */
+    if (cinfo->optimize_coding)
+      master->pass_type = huff_opt_pass;
+    else
+      master->pass_type = output_pass;
+  } else {
+    /* for normal compression, first pass is always this type: */
+    master->pass_type = main_pass;
+  }
+  master->scan_number = 0;
+  master->pass_number = 0;
+  if (cinfo->optimize_coding)
+    master->total_passes = cinfo->num_scans * 2;
+  else
+    master->total_passes = cinfo->num_scans;
+}
diff --git a/common/jpeg/jcomapi.c b/common/jpeg/jcomapi.c
new file mode 100644
index 00000000..9b1fa756
--- /dev/null
+++ b/common/jpeg/jcomapi.c
@@ -0,0 +1,106 @@
+/*
+ * jcomapi.c
+ *
+ * Copyright (C) 1994-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains application interface routines that are used for both
+ * compression and decompression.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * Abort processing of a JPEG compression or decompression operation,
+ * but don't destroy the object itself.
+ *
+ * For this, we merely clean up all the nonpermanent memory pools.
+ * Note that temp files (virtual arrays) are not allowed to belong to
+ * the permanent pool, so we will be able to close all temp files here.
+ * Closing a data source or destination, if necessary, is the application's
+ * responsibility.
+ */
+
+GLOBAL(void)
+jpeg_abort (j_common_ptr cinfo)
+{
+  int pool;
+
+  /* Do nothing if called on a not-initialized or destroyed JPEG object. */
+  if (cinfo->mem == NULL)
+    return;
+
+  /* Releasing pools in reverse order might help avoid fragmentation
+   * with some (brain-damaged) malloc libraries.
+   */
+  for (pool = JPOOL_NUMPOOLS-1; pool > JPOOL_PERMANENT; pool--) {
+    (*cinfo->mem->free_pool) (cinfo, pool);
+  }
+
+  /* Reset overall state for possible reuse of object */
+  if (cinfo->is_decompressor) {
+    cinfo->global_state = DSTATE_START;
+    /* Try to keep application from accessing now-deleted marker list.
+     * A bit kludgy to do it here, but this is the most central place.
+     */
+    ((j_decompress_ptr) cinfo)->marker_list = NULL;
+  } else {
+    cinfo->global_state = CSTATE_START;
+  }
+}
+
+
+/*
+ * Destruction of a JPEG object.
+ *
+ * Everything gets deallocated except the master jpeg_compress_struct itself
+ * and the error manager struct.  Both of these are supplied by the application
+ * and must be freed, if necessary, by the application.  (Often they are on
+ * the stack and so don't need to be freed anyway.)
+ * Closing a data source or destination, if necessary, is the application's
+ * responsibility.
+ */
+
+GLOBAL(void)
+jpeg_destroy (j_common_ptr cinfo)
+{
+  /* We need only tell the memory manager to release everything. */
+  /* NB: mem pointer is NULL if memory mgr failed to initialize. */
+  if (cinfo->mem != NULL)
+    (*cinfo->mem->self_destruct) (cinfo);
+  cinfo->mem = NULL;		/* be safe if jpeg_destroy is called twice */
+  cinfo->global_state = 0;	/* mark it destroyed */
+}
+
+
+/*
+ * Convenience routines for allocating quantization and Huffman tables.
+ * (Would jutils.c be a more reasonable place to put these?)
+ */
+
+GLOBAL(JQUANT_TBL *)
+jpeg_alloc_quant_table (j_common_ptr cinfo)
+{
+  JQUANT_TBL *tbl;
+
+  tbl = (JQUANT_TBL *)
+    (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JQUANT_TBL));
+  tbl->sent_table = FALSE;	/* make sure this is false in any new table */
+  return tbl;
+}
+
+
+GLOBAL(JHUFF_TBL *)
+jpeg_alloc_huff_table (j_common_ptr cinfo)
+{
+  JHUFF_TBL *tbl;
+
+  tbl = (JHUFF_TBL *)
+    (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JHUFF_TBL));
+  tbl->sent_table = FALSE;	/* make sure this is false in any new table */
+  return tbl;
+}
diff --git a/common/jpeg/jconfig.cfg b/common/jpeg/jconfig.cfg
new file mode 100644
index 00000000..36a04fa8
--- /dev/null
+++ b/common/jpeg/jconfig.cfg
@@ -0,0 +1,44 @@
+/* jconfig.cfg --- source file edited by configure script */
+/* see jconfig.doc for explanations */
+
+#undef HAVE_PROTOTYPES
+#undef HAVE_UNSIGNED_CHAR
+#undef HAVE_UNSIGNED_SHORT
+#undef void
+#undef const
+#undef CHAR_IS_UNSIGNED
+#undef HAVE_STDDEF_H
+#undef HAVE_STDLIB_H
+#undef NEED_BSD_STRINGS
+#undef NEED_SYS_TYPES_H
+#undef NEED_FAR_POINTERS
+#undef NEED_SHORT_EXTERNAL_NAMES
+/* Define this if you get warnings about undefined structures. */
+#undef INCOMPLETE_TYPES_BROKEN
+
+#ifdef JPEG_INTERNALS
+
+#undef RIGHT_SHIFT_IS_UNSIGNED
+#undef INLINE
+/* These are for configuring the JPEG memory manager. */
+#undef DEFAULT_MAX_MEM
+#undef NO_MKTEMP
+
+#endif /* JPEG_INTERNALS */
+
+#ifdef JPEG_CJPEG_DJPEG
+
+#define BMP_SUPPORTED		/* BMP image file format */
+#define GIF_SUPPORTED		/* GIF image file format */
+#define PPM_SUPPORTED		/* PBMPLUS PPM/PGM image file format */
+#undef RLE_SUPPORTED		/* Utah RLE image file format */
+#define TARGA_SUPPORTED		/* Targa image file format */
+
+#undef TWO_FILE_COMMANDLINE
+#undef NEED_SIGNAL_CATCHER
+#undef DONT_USE_B_MODE
+
+/* Define this if you want percent-done progress reports from cjpeg/djpeg. */
+#undef PROGRESS_REPORT
+
+#endif /* JPEG_CJPEG_DJPEG */
diff --git a/common/jpeg/jconfig.doc b/common/jpeg/jconfig.doc
new file mode 100644
index 00000000..c18d1c06
--- /dev/null
+++ b/common/jpeg/jconfig.doc
@@ -0,0 +1,155 @@
+/*
+ * jconfig.doc
+ *
+ * Copyright (C) 1991-1994, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file documents the configuration options that are required to
+ * customize the JPEG software for a particular system.
+ *
+ * The actual configuration options for a particular installation are stored
+ * in jconfig.h.  On many machines, jconfig.h can be generated automatically
+ * or copied from one of the "canned" jconfig files that we supply.  But if
+ * you need to generate a jconfig.h file by hand, this file tells you how.
+ *
+ * DO NOT EDIT THIS FILE --- IT WON'T ACCOMPLISH ANYTHING.
+ * EDIT A COPY NAMED JCONFIG.H.
+ */
+
+
+/*
+ * These symbols indicate the properties of your machine or compiler.
+ * #define the symbol if yes, #undef it if no.
+ */
+
+/* Does your compiler support function prototypes?
+ * (If not, you also need to use ansi2knr, see install.doc)
+ */
+#define HAVE_PROTOTYPES
+
+/* Does your compiler support the declaration "unsigned char" ?
+ * How about "unsigned short" ?
+ */
+#define HAVE_UNSIGNED_CHAR
+#define HAVE_UNSIGNED_SHORT
+
+/* Define "void" as "char" if your compiler doesn't know about type void.
+ * NOTE: be sure to define void such that "void *" represents the most general
+ * pointer type, e.g., that returned by malloc().
+ */
+/* #define void char */
+
+/* Define "const" as empty if your compiler doesn't know the "const" keyword.
+ */
+/* #define const */
+
+/* Define this if an ordinary "char" type is unsigned.
+ * If you're not sure, leaving it undefined will work at some cost in speed.
+ * If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
+ */
+#undef CHAR_IS_UNSIGNED
+
+/* Define this if your system has an ANSI-conforming <stddef.h> file.
+ */
+#define HAVE_STDDEF_H
+
+/* Define this if your system has an ANSI-conforming <stdlib.h> file.
+ */
+#define HAVE_STDLIB_H
+
+/* Define this if your system does not have an ANSI/SysV <string.h>,
+ * but does have a BSD-style <strings.h>.
+ */
+#undef NEED_BSD_STRINGS
+
+/* Define this if your system does not provide typedef size_t in any of the
+ * ANSI-standard places (stddef.h, stdlib.h, or stdio.h), but places it in
+ * <sys/types.h> instead.
+ */
+#undef NEED_SYS_TYPES_H
+
+/* For 80x86 machines, you need to define NEED_FAR_POINTERS,
+ * unless you are using a large-data memory model or 80386 flat-memory mode.
+ * On less brain-damaged CPUs this symbol must not be defined.
+ * (Defining this symbol causes large data structures to be referenced through
+ * "far" pointers and to be allocated with a special version of malloc.)
+ */
+#undef NEED_FAR_POINTERS
+
+/* Define this if your linker needs global names to be unique in less
+ * than the first 15 characters.
+ */
+#undef NEED_SHORT_EXTERNAL_NAMES
+
+/* Although a real ANSI C compiler can deal perfectly well with pointers to
+ * unspecified structures (see "incomplete types" in the spec), a few pre-ANSI
+ * and pseudo-ANSI compilers get confused.  To keep one of these bozos happy,
+ * define INCOMPLETE_TYPES_BROKEN.  This is not recommended unless you
+ * actually get "missing structure definition" warnings or errors while
+ * compiling the JPEG code.
+ */
+#undef INCOMPLETE_TYPES_BROKEN
+
+
+/*
+ * The following options affect code selection within the JPEG library,
+ * but they don't need to be visible to applications using the library.
+ * To minimize application namespace pollution, the symbols won't be
+ * defined unless JPEG_INTERNALS has been defined.
+ */
+
+#ifdef JPEG_INTERNALS
+
+/* Define this if your compiler implements ">>" on signed values as a logical
+ * (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
+ * which is the normal and rational definition.
+ */
+#undef RIGHT_SHIFT_IS_UNSIGNED
+
+
+#endif /* JPEG_INTERNALS */
+
+
+/*
+ * The remaining options do not affect the JPEG library proper,
+ * but only the sample applications cjpeg/djpeg (see cjpeg.c, djpeg.c).
+ * Other applications can ignore these.
+ */
+
+#ifdef JPEG_CJPEG_DJPEG
+
+/* These defines indicate which image (non-JPEG) file formats are allowed. */
+
+#define BMP_SUPPORTED		/* BMP image file format */
+#define GIF_SUPPORTED		/* GIF image file format */
+#define PPM_SUPPORTED		/* PBMPLUS PPM/PGM image file format */
+#undef RLE_SUPPORTED		/* Utah RLE image file format */
+#define TARGA_SUPPORTED		/* Targa image file format */
+
+/* Define this if you want to name both input and output files on the command
+ * line, rather than using stdout and optionally stdin.  You MUST do this if
+ * your system can't cope with binary I/O to stdin/stdout.  See comments at
+ * head of cjpeg.c or djpeg.c.
+ */
+#undef TWO_FILE_COMMANDLINE
+
+/* Define this if your system needs explicit cleanup of temporary files.
+ * This is crucial under MS-DOS, where the temporary "files" may be areas
+ * of extended memory; on most other systems it's not as important.
+ */
+#undef NEED_SIGNAL_CATCHER
+
+/* By default, we open image files with fopen(...,"rb") or fopen(...,"wb").
+ * This is necessary on systems that distinguish text files from binary files,
+ * and is harmless on most systems that don't.  If you have one of the rare
+ * systems that complains about the "b" spec, define this symbol.
+ */
+#undef DONT_USE_B_MODE
+
+/* Define this if you want percent-done progress reports from cjpeg/djpeg.
+ */
+#undef PROGRESS_REPORT
+
+
+#endif /* JPEG_CJPEG_DJPEG */
diff --git a/common/jpeg/jconfig.h b/common/jpeg/jconfig.h
new file mode 100644
index 00000000..7e291c75
--- /dev/null
+++ b/common/jpeg/jconfig.h
@@ -0,0 +1,45 @@
+/* jconfig.vc --- jconfig.h for Microsoft Visual C++ on Windows 95 or NT. */
+/* see jconfig.doc for explanations */
+
+#define HAVE_PROTOTYPES
+#define HAVE_UNSIGNED_CHAR
+#define HAVE_UNSIGNED_SHORT
+/* #define void char */
+/* #define const */
+#undef CHAR_IS_UNSIGNED
+#define HAVE_STDDEF_H
+#define HAVE_STDLIB_H
+#undef NEED_BSD_STRINGS
+#undef NEED_SYS_TYPES_H
+#undef NEED_FAR_POINTERS	/* we presume a 32-bit flat memory model */
+#undef NEED_SHORT_EXTERNAL_NAMES
+#undef INCOMPLETE_TYPES_BROKEN
+
+/* Define "boolean" as unsigned char, not int, per Windows custom */
+#ifndef __RPCNDR_H__		/* don't conflict if rpcndr.h already read */
+typedef unsigned char boolean;
+#endif
+#define HAVE_BOOLEAN		/* prevent jmorecfg.h from redefining it */
+
+
+#ifdef JPEG_INTERNALS
+
+#undef RIGHT_SHIFT_IS_UNSIGNED
+
+#endif /* JPEG_INTERNALS */
+
+#ifdef JPEG_CJPEG_DJPEG
+
+#define BMP_SUPPORTED		/* BMP image file format */
+#define GIF_SUPPORTED		/* GIF image file format */
+#define PPM_SUPPORTED		/* PBMPLUS PPM/PGM image file format */
+#undef RLE_SUPPORTED		/* Utah RLE image file format */
+#define TARGA_SUPPORTED		/* Targa image file format */
+
+#define TWO_FILE_COMMANDLINE	/* optional */
+#define USE_SETMODE		/* Microsoft has setmode() */
+#undef NEED_SIGNAL_CATCHER
+#undef DONT_USE_B_MODE
+#undef PROGRESS_REPORT		/* optional */
+
+#endif /* JPEG_CJPEG_DJPEG */
diff --git a/common/jpeg/jcparam.c b/common/jpeg/jcparam.c
new file mode 100644
index 00000000..6fc48f53
--- /dev/null
+++ b/common/jpeg/jcparam.c
@@ -0,0 +1,610 @@
+/*
+ * jcparam.c
+ *
+ * Copyright (C) 1991-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains optional default-setting code for the JPEG compressor.
+ * Applications do not have to use this file, but those that don't use it
+ * must know a lot more about the innards of the JPEG code.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * Quantization table setup routines
+ */
+
+GLOBAL(void)
+jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl,
+		      const unsigned int *basic_table,
+		      int scale_factor, boolean force_baseline)
+/* Define a quantization table equal to the basic_table times
+ * a scale factor (given as a percentage).
+ * If force_baseline is TRUE, the computed quantization table entries
+ * are limited to 1..255 for JPEG baseline compatibility.
+ */
+{
+  JQUANT_TBL ** qtblptr;
+  int i;
+  long temp;
+
+  /* Safety check to ensure start_compress not called yet. */
+  if (cinfo->global_state != CSTATE_START)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  if (which_tbl < 0 || which_tbl >= NUM_QUANT_TBLS)
+    ERREXIT1(cinfo, JERR_DQT_INDEX, which_tbl);
+
+  qtblptr = & cinfo->quant_tbl_ptrs[which_tbl];
+
+  if (*qtblptr == NULL)
+    *qtblptr = jpeg_alloc_quant_table((j_common_ptr) cinfo);
+
+  for (i = 0; i < DCTSIZE2; i++) {
+    temp = ((long) basic_table[i] * scale_factor + 50L) / 100L;
+    /* limit the values to the valid range */
+    if (temp <= 0L) temp = 1L;
+    if (temp > 32767L) temp = 32767L; /* max quantizer needed for 12 bits */
+    if (force_baseline && temp > 255L)
+      temp = 255L;		/* limit to baseline range if requested */
+    (*qtblptr)->quantval[i] = (UINT16) temp;
+  }
+
+  /* Initialize sent_table FALSE so table will be written to JPEG file. */
+  (*qtblptr)->sent_table = FALSE;
+}
+
+
+GLOBAL(void)
+jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor,
+			 boolean force_baseline)
+/* Set or change the 'quality' (quantization) setting, using default tables
+ * and a straight percentage-scaling quality scale.  In most cases it's better
+ * to use jpeg_set_quality (below); this entry point is provided for
+ * applications that insist on a linear percentage scaling.
+ */
+{
+  /* These are the sample quantization tables given in JPEG spec section K.1.
+   * The spec says that the values given produce "good" quality, and
+   * when divided by 2, "very good" quality.
+   */
+  static const unsigned int std_luminance_quant_tbl[DCTSIZE2] = {
+    16,  11,  10,  16,  24,  40,  51,  61,
+    12,  12,  14,  19,  26,  58,  60,  55,
+    14,  13,  16,  24,  40,  57,  69,  56,
+    14,  17,  22,  29,  51,  87,  80,  62,
+    18,  22,  37,  56,  68, 109, 103,  77,
+    24,  35,  55,  64,  81, 104, 113,  92,
+    49,  64,  78,  87, 103, 121, 120, 101,
+    72,  92,  95,  98, 112, 100, 103,  99
+  };
+  static const unsigned int std_chrominance_quant_tbl[DCTSIZE2] = {
+    17,  18,  24,  47,  99,  99,  99,  99,
+    18,  21,  26,  66,  99,  99,  99,  99,
+    24,  26,  56,  99,  99,  99,  99,  99,
+    47,  66,  99,  99,  99,  99,  99,  99,
+    99,  99,  99,  99,  99,  99,  99,  99,
+    99,  99,  99,  99,  99,  99,  99,  99,
+    99,  99,  99,  99,  99,  99,  99,  99,
+    99,  99,  99,  99,  99,  99,  99,  99
+  };
+
+  /* Set up two quantization tables using the specified scaling */
+  jpeg_add_quant_table(cinfo, 0, std_luminance_quant_tbl,
+		       scale_factor, force_baseline);
+  jpeg_add_quant_table(cinfo, 1, std_chrominance_quant_tbl,
+		       scale_factor, force_baseline);
+}
+
+
+GLOBAL(int)
+jpeg_quality_scaling (int quality)
+/* Convert a user-specified quality rating to a percentage scaling factor
+ * for an underlying quantization table, using our recommended scaling curve.
+ * The input 'quality' factor should be 0 (terrible) to 100 (very good).
+ */
+{
+  /* Safety limit on quality factor.  Convert 0 to 1 to avoid zero divide. */
+  if (quality <= 0) quality = 1;
+  if (quality > 100) quality = 100;
+
+  /* The basic table is used as-is (scaling 100) for a quality of 50.
+   * Qualities 50..100 are converted to scaling percentage 200 - 2*Q;
+   * note that at Q=100 the scaling is 0, which will cause jpeg_add_quant_table
+   * to make all the table entries 1 (hence, minimum quantization loss).
+   * Qualities 1..50 are converted to scaling percentage 5000/Q.
+   */
+  if (quality < 50)
+    quality = 5000 / quality;
+  else
+    quality = 200 - quality*2;
+
+  return quality;
+}
+
+
+GLOBAL(void)
+jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline)
+/* Set or change the 'quality' (quantization) setting, using default tables.
+ * This is the standard quality-adjusting entry point for typical user
+ * interfaces; only those who want detailed control over quantization tables
+ * would use the preceding three routines directly.
+ */
+{
+  /* Convert user 0-100 rating to percentage scaling */
+  quality = jpeg_quality_scaling(quality);
+
+  /* Set up standard quality tables */
+  jpeg_set_linear_quality(cinfo, quality, force_baseline);
+}
+
+
+/*
+ * Huffman table setup routines
+ */
+
+LOCAL(void)
+add_huff_table (j_compress_ptr cinfo,
+		JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val)
+/* Define a Huffman table */
+{
+  int nsymbols, len;
+
+  if (*htblptr == NULL)
+    *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
+
+  /* Copy the number-of-symbols-of-each-code-length counts */
+  MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
+
+  /* Validate the counts.  We do this here mainly so we can copy the right
+   * number of symbols from the val[] array, without risking marching off
+   * the end of memory.  jchuff.c will do a more thorough test later.
+   */
+  nsymbols = 0;
+  for (len = 1; len <= 16; len++)
+    nsymbols += bits[len];
+  if (nsymbols < 1 || nsymbols > 256)
+    ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+
+  MEMCOPY((*htblptr)->huffval, val, nsymbols * SIZEOF(UINT8));
+
+  /* Initialize sent_table FALSE so table will be written to JPEG file. */
+  (*htblptr)->sent_table = FALSE;
+}
+
+
+LOCAL(void)
+std_huff_tables (j_compress_ptr cinfo)
+/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
+/* IMPORTANT: these are only valid for 8-bit data precision! */
+{
+  static const UINT8 bits_dc_luminance[17] =
+    { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
+  static const UINT8 val_dc_luminance[] =
+    { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
+  
+  static const UINT8 bits_dc_chrominance[17] =
+    { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
+  static const UINT8 val_dc_chrominance[] =
+    { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
+  
+  static const UINT8 bits_ac_luminance[17] =
+    { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
+  static const UINT8 val_ac_luminance[] =
+    { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
+      0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
+      0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
+      0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
+      0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
+      0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
+      0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
+      0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
+      0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
+      0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
+      0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
+      0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
+      0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
+      0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+      0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
+      0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
+      0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
+      0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
+      0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
+      0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
+      0xf9, 0xfa };
+  
+  static const UINT8 bits_ac_chrominance[17] =
+    { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
+  static const UINT8 val_ac_chrominance[] =
+    { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
+      0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
+      0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
+      0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
+      0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
+      0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
+      0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
+      0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
+      0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
+      0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
+      0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
+      0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+      0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
+      0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
+      0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
+      0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
+      0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
+      0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
+      0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
+      0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
+      0xf9, 0xfa };
+  
+  add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[0],
+		 bits_dc_luminance, val_dc_luminance);
+  add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[0],
+		 bits_ac_luminance, val_ac_luminance);
+  add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[1],
+		 bits_dc_chrominance, val_dc_chrominance);
+  add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1],
+		 bits_ac_chrominance, val_ac_chrominance);
+}
+
+
+/*
+ * Default parameter setup for compression.
+ *
+ * Applications that don't choose to use this routine must do their
+ * own setup of all these parameters.  Alternately, you can call this
+ * to establish defaults and then alter parameters selectively.  This
+ * is the recommended approach since, if we add any new parameters,
+ * your code will still work (they'll be set to reasonable defaults).
+ */
+
+GLOBAL(void)
+jpeg_set_defaults (j_compress_ptr cinfo)
+{
+  int i;
+
+  /* Safety check to ensure start_compress not called yet. */
+  if (cinfo->global_state != CSTATE_START)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  /* Allocate comp_info array large enough for maximum component count.
+   * Array is made permanent in case application wants to compress
+   * multiple images at same param settings.
+   */
+  if (cinfo->comp_info == NULL)
+    cinfo->comp_info = (jpeg_component_info *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+				  MAX_COMPONENTS * SIZEOF(jpeg_component_info));
+
+  /* Initialize everything not dependent on the color space */
+
+  cinfo->data_precision = BITS_IN_JSAMPLE;
+  /* Set up two quantization tables using default quality of 75 */
+  jpeg_set_quality(cinfo, 75, TRUE);
+  /* Set up two Huffman tables */
+  std_huff_tables(cinfo);
+
+  /* Initialize default arithmetic coding conditioning */
+  for (i = 0; i < NUM_ARITH_TBLS; i++) {
+    cinfo->arith_dc_L[i] = 0;
+    cinfo->arith_dc_U[i] = 1;
+    cinfo->arith_ac_K[i] = 5;
+  }
+
+  /* Default is no multiple-scan output */
+  cinfo->scan_info = NULL;
+  cinfo->num_scans = 0;
+
+  /* Expect normal source image, not raw downsampled data */
+  cinfo->raw_data_in = FALSE;
+
+  /* Use Huffman coding, not arithmetic coding, by default */
+  cinfo->arith_code = FALSE;
+
+  /* By default, don't do extra passes to optimize entropy coding */
+  cinfo->optimize_coding = FALSE;
+  /* The standard Huffman tables are only valid for 8-bit data precision.
+   * If the precision is higher, force optimization on so that usable
+   * tables will be computed.  This test can be removed if default tables
+   * are supplied that are valid for the desired precision.
+   */
+  if (cinfo->data_precision > 8)
+    cinfo->optimize_coding = TRUE;
+
+  /* By default, use the simpler non-cosited sampling alignment */
+  cinfo->CCIR601_sampling = FALSE;
+
+  /* No input smoothing */
+  cinfo->smoothing_factor = 0;
+
+  /* DCT algorithm preference */
+  cinfo->dct_method = JDCT_DEFAULT;
+
+  /* No restart markers */
+  cinfo->restart_interval = 0;
+  cinfo->restart_in_rows = 0;
+
+  /* Fill in default JFIF marker parameters.  Note that whether the marker
+   * will actually be written is determined by jpeg_set_colorspace.
+   *
+   * By default, the library emits JFIF version code 1.01.
+   * An application that wants to emit JFIF 1.02 extension markers should set
+   * JFIF_minor_version to 2.  We could probably get away with just defaulting
+   * to 1.02, but there may still be some decoders in use that will complain
+   * about that; saying 1.01 should minimize compatibility problems.
+   */
+  cinfo->JFIF_major_version = 1; /* Default JFIF version = 1.01 */
+  cinfo->JFIF_minor_version = 1;
+  cinfo->density_unit = 0;	/* Pixel size is unknown by default */
+  cinfo->X_density = 1;		/* Pixel aspect ratio is square by default */
+  cinfo->Y_density = 1;
+
+  /* Choose JPEG colorspace based on input space, set defaults accordingly */
+
+  jpeg_default_colorspace(cinfo);
+}
+
+
+/*
+ * Select an appropriate JPEG colorspace for in_color_space.
+ */
+
+GLOBAL(void)
+jpeg_default_colorspace (j_compress_ptr cinfo)
+{
+  switch (cinfo->in_color_space) {
+  case JCS_GRAYSCALE:
+    jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
+    break;
+  case JCS_RGB:
+    jpeg_set_colorspace(cinfo, JCS_YCbCr);
+    break;
+  case JCS_YCbCr:
+    jpeg_set_colorspace(cinfo, JCS_YCbCr);
+    break;
+  case JCS_CMYK:
+    jpeg_set_colorspace(cinfo, JCS_CMYK); /* By default, no translation */
+    break;
+  case JCS_YCCK:
+    jpeg_set_colorspace(cinfo, JCS_YCCK);
+    break;
+  case JCS_UNKNOWN:
+    jpeg_set_colorspace(cinfo, JCS_UNKNOWN);
+    break;
+  default:
+    ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE);
+  }
+}
+
+
+/*
+ * Set the JPEG colorspace, and choose colorspace-dependent default values.
+ */
+
+GLOBAL(void)
+jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace)
+{
+  jpeg_component_info * compptr;
+  int ci;
+
+#define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl)  \
+  (compptr = &cinfo->comp_info[index], \
+   compptr->component_id = (id), \
+   compptr->h_samp_factor = (hsamp), \
+   compptr->v_samp_factor = (vsamp), \
+   compptr->quant_tbl_no = (quant), \
+   compptr->dc_tbl_no = (dctbl), \
+   compptr->ac_tbl_no = (actbl) )
+
+  /* Safety check to ensure start_compress not called yet. */
+  if (cinfo->global_state != CSTATE_START)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  /* For all colorspaces, we use Q and Huff tables 0 for luminance components,
+   * tables 1 for chrominance components.
+   */
+
+  cinfo->jpeg_color_space = colorspace;
+
+  cinfo->write_JFIF_header = FALSE; /* No marker for non-JFIF colorspaces */
+  cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */
+
+  switch (colorspace) {
+  case JCS_GRAYSCALE:
+    cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
+    cinfo->num_components = 1;
+    /* JFIF specifies component ID 1 */
+    SET_COMP(0, 1, 1,1, 0, 0,0);
+    break;
+  case JCS_RGB:
+    cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag RGB */
+    cinfo->num_components = 3;
+    SET_COMP(0, 0x52 /* 'R' */, 1,1, 0, 0,0);
+    SET_COMP(1, 0x47 /* 'G' */, 1,1, 0, 0,0);
+    SET_COMP(2, 0x42 /* 'B' */, 1,1, 0, 0,0);
+    break;
+  case JCS_YCbCr:
+    cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */
+    cinfo->num_components = 3;
+    /* JFIF specifies component IDs 1,2,3 */
+    /* We default to 2x2 subsamples of chrominance */
+    SET_COMP(0, 1, 2,2, 0, 0,0);
+    SET_COMP(1, 2, 1,1, 1, 1,1);
+    SET_COMP(2, 3, 1,1, 1, 1,1);
+    break;
+  case JCS_CMYK:
+    cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */
+    cinfo->num_components = 4;
+    SET_COMP(0, 0x43 /* 'C' */, 1,1, 0, 0,0);
+    SET_COMP(1, 0x4D /* 'M' */, 1,1, 0, 0,0);
+    SET_COMP(2, 0x59 /* 'Y' */, 1,1, 0, 0,0);
+    SET_COMP(3, 0x4B /* 'K' */, 1,1, 0, 0,0);
+    break;
+  case JCS_YCCK:
+    cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag YCCK */
+    cinfo->num_components = 4;
+    SET_COMP(0, 1, 2,2, 0, 0,0);
+    SET_COMP(1, 2, 1,1, 1, 1,1);
+    SET_COMP(2, 3, 1,1, 1, 1,1);
+    SET_COMP(3, 4, 2,2, 0, 0,0);
+    break;
+  case JCS_UNKNOWN:
+    cinfo->num_components = cinfo->input_components;
+    if (cinfo->num_components < 1 || cinfo->num_components > MAX_COMPONENTS)
+      ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
+	       MAX_COMPONENTS);
+    for (ci = 0; ci < cinfo->num_components; ci++) {
+      SET_COMP(ci, ci, 1,1, 0, 0,0);
+    }
+    break;
+  default:
+    ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+  }
+}
+
+
+#ifdef C_PROGRESSIVE_SUPPORTED
+
+LOCAL(jpeg_scan_info *)
+fill_a_scan (jpeg_scan_info * scanptr, int ci,
+	     int Ss, int Se, int Ah, int Al)
+/* Support routine: generate one scan for specified component */
+{
+  scanptr->comps_in_scan = 1;
+  scanptr->component_index[0] = ci;
+  scanptr->Ss = Ss;
+  scanptr->Se = Se;
+  scanptr->Ah = Ah;
+  scanptr->Al = Al;
+  scanptr++;
+  return scanptr;
+}
+
+LOCAL(jpeg_scan_info *)
+fill_scans (jpeg_scan_info * scanptr, int ncomps,
+	    int Ss, int Se, int Ah, int Al)
+/* Support routine: generate one scan for each component */
+{
+  int ci;
+
+  for (ci = 0; ci < ncomps; ci++) {
+    scanptr->comps_in_scan = 1;
+    scanptr->component_index[0] = ci;
+    scanptr->Ss = Ss;
+    scanptr->Se = Se;
+    scanptr->Ah = Ah;
+    scanptr->Al = Al;
+    scanptr++;
+  }
+  return scanptr;
+}
+
+LOCAL(jpeg_scan_info *)
+fill_dc_scans (jpeg_scan_info * scanptr, int ncomps, int Ah, int Al)
+/* Support routine: generate interleaved DC scan if possible, else N scans */
+{
+  int ci;
+
+  if (ncomps <= MAX_COMPS_IN_SCAN) {
+    /* Single interleaved DC scan */
+    scanptr->comps_in_scan = ncomps;
+    for (ci = 0; ci < ncomps; ci++)
+      scanptr->component_index[ci] = ci;
+    scanptr->Ss = scanptr->Se = 0;
+    scanptr->Ah = Ah;
+    scanptr->Al = Al;
+    scanptr++;
+  } else {
+    /* Noninterleaved DC scan for each component */
+    scanptr = fill_scans(scanptr, ncomps, 0, 0, Ah, Al);
+  }
+  return scanptr;
+}
+
+
+/*
+ * Create a recommended progressive-JPEG script.
+ * cinfo->num_components and cinfo->jpeg_color_space must be correct.
+ */
+
+GLOBAL(void)
+jpeg_simple_progression (j_compress_ptr cinfo)
+{
+  int ncomps = cinfo->num_components;
+  int nscans;
+  jpeg_scan_info * scanptr;
+
+  /* Safety check to ensure start_compress not called yet. */
+  if (cinfo->global_state != CSTATE_START)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  /* Figure space needed for script.  Calculation must match code below! */
+  if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) {
+    /* Custom script for YCbCr color images. */
+    nscans = 10;
+  } else {
+    /* All-purpose script for other color spaces. */
+    if (ncomps > MAX_COMPS_IN_SCAN)
+      nscans = 6 * ncomps;	/* 2 DC + 4 AC scans per component */
+    else
+      nscans = 2 + 4 * ncomps;	/* 2 DC scans; 4 AC scans per component */
+  }
+
+  /* Allocate space for script.
+   * We need to put it in the permanent pool in case the application performs
+   * multiple compressions without changing the settings.  To avoid a memory
+   * leak if jpeg_simple_progression is called repeatedly for the same JPEG
+   * object, we try to re-use previously allocated space, and we allocate
+   * enough space to handle YCbCr even if initially asked for grayscale.
+   */
+  if (cinfo->script_space == NULL || cinfo->script_space_size < nscans) {
+    cinfo->script_space_size = MAX(nscans, 10);
+    cinfo->script_space = (jpeg_scan_info *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+			cinfo->script_space_size * SIZEOF(jpeg_scan_info));
+  }
+  scanptr = cinfo->script_space;
+  cinfo->scan_info = scanptr;
+  cinfo->num_scans = nscans;
+
+  if (ncomps == 3 && cinfo->jpeg_color_space == JCS_YCbCr) {
+    /* Custom script for YCbCr color images. */
+    /* Initial DC scan */
+    scanptr = fill_dc_scans(scanptr, ncomps, 0, 1);
+    /* Initial AC scan: get some luma data out in a hurry */
+    scanptr = fill_a_scan(scanptr, 0, 1, 5, 0, 2);
+    /* Chroma data is too small to be worth expending many scans on */
+    scanptr = fill_a_scan(scanptr, 2, 1, 63, 0, 1);
+    scanptr = fill_a_scan(scanptr, 1, 1, 63, 0, 1);
+    /* Complete spectral selection for luma AC */
+    scanptr = fill_a_scan(scanptr, 0, 6, 63, 0, 2);
+    /* Refine next bit of luma AC */
+    scanptr = fill_a_scan(scanptr, 0, 1, 63, 2, 1);
+    /* Finish DC successive approximation */
+    scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
+    /* Finish AC successive approximation */
+    scanptr = fill_a_scan(scanptr, 2, 1, 63, 1, 0);
+    scanptr = fill_a_scan(scanptr, 1, 1, 63, 1, 0);
+    /* Luma bottom bit comes last since it's usually largest scan */
+    scanptr = fill_a_scan(scanptr, 0, 1, 63, 1, 0);
+  } else {
+    /* All-purpose script for other color spaces. */
+    /* Successive approximation first pass */
+    scanptr = fill_dc_scans(scanptr, ncomps, 0, 1);
+    scanptr = fill_scans(scanptr, ncomps, 1, 5, 0, 2);
+    scanptr = fill_scans(scanptr, ncomps, 6, 63, 0, 2);
+    /* Successive approximation second pass */
+    scanptr = fill_scans(scanptr, ncomps, 1, 63, 2, 1);
+    /* Successive approximation final pass */
+    scanptr = fill_dc_scans(scanptr, ncomps, 1, 0);
+    scanptr = fill_scans(scanptr, ncomps, 1, 63, 1, 0);
+  }
+}
+
+#endif /* C_PROGRESSIVE_SUPPORTED */
diff --git a/common/jpeg/jcphuff.c b/common/jpeg/jcphuff.c
new file mode 100644
index 00000000..07f9178b
--- /dev/null
+++ b/common/jpeg/jcphuff.c
@@ -0,0 +1,833 @@
+/*
+ * jcphuff.c
+ *
+ * Copyright (C) 1995-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains Huffman entropy encoding routines for progressive JPEG.
+ *
+ * We do not support output suspension in this module, since the library
+ * currently does not allow multiple-scan files to be written with output
+ * suspension.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jchuff.h"		/* Declarations shared with jchuff.c */
+
+#ifdef C_PROGRESSIVE_SUPPORTED
+
+/* Expanded entropy encoder object for progressive Huffman encoding. */
+
+typedef struct {
+  struct jpeg_entropy_encoder pub; /* public fields */
+
+  /* Mode flag: TRUE for optimization, FALSE for actual data output */
+  boolean gather_statistics;
+
+  /* Bit-level coding status.
+   * next_output_byte/free_in_buffer are local copies of cinfo->dest fields.
+   */
+  JOCTET * next_output_byte;	/* => next byte to write in buffer */
+  size_t free_in_buffer;	/* # of byte spaces remaining in buffer */
+  INT32 put_buffer;		/* current bit-accumulation buffer */
+  int put_bits;			/* # of bits now in it */
+  j_compress_ptr cinfo;		/* link to cinfo (needed for dump_buffer) */
+
+  /* Coding status for DC components */
+  int last_dc_val[MAX_COMPS_IN_SCAN]; /* last DC coef for each component */
+
+  /* Coding status for AC components */
+  int ac_tbl_no;		/* the table number of the single component */
+  unsigned int EOBRUN;		/* run length of EOBs */
+  unsigned int BE;		/* # of buffered correction bits before MCU */
+  char * bit_buffer;		/* buffer for correction bits (1 per char) */
+  /* packing correction bits tightly would save some space but cost time... */
+
+  unsigned int restarts_to_go;	/* MCUs left in this restart interval */
+  int next_restart_num;		/* next restart number to write (0-7) */
+
+  /* Pointers to derived tables (these workspaces have image lifespan).
+   * Since any one scan codes only DC or only AC, we only need one set
+   * of tables, not one for DC and one for AC.
+   */
+  c_derived_tbl * derived_tbls[NUM_HUFF_TBLS];
+
+  /* Statistics tables for optimization; again, one set is enough */
+  long * count_ptrs[NUM_HUFF_TBLS];
+} phuff_entropy_encoder;
+
+typedef phuff_entropy_encoder * phuff_entropy_ptr;
+
+/* MAX_CORR_BITS is the number of bits the AC refinement correction-bit
+ * buffer can hold.  Larger sizes may slightly improve compression, but
+ * 1000 is already well into the realm of overkill.
+ * The minimum safe size is 64 bits.
+ */
+
+#define MAX_CORR_BITS  1000	/* Max # of correction bits I can buffer */
+
+/* IRIGHT_SHIFT is like RIGHT_SHIFT, but works on int rather than INT32.
+ * We assume that int right shift is unsigned if INT32 right shift is,
+ * which should be safe.
+ */
+
+#ifdef RIGHT_SHIFT_IS_UNSIGNED
+#define ISHIFT_TEMPS	int ishift_temp;
+#define IRIGHT_SHIFT(x,shft)  \
+	((ishift_temp = (x)) < 0 ? \
+	 (ishift_temp >> (shft)) | ((~0) << (16-(shft))) : \
+	 (ishift_temp >> (shft)))
+#else
+#define ISHIFT_TEMPS
+#define IRIGHT_SHIFT(x,shft)	((x) >> (shft))
+#endif
+
+/* Forward declarations */
+METHODDEF(boolean) encode_mcu_DC_first JPP((j_compress_ptr cinfo,
+					    JBLOCKROW *MCU_data));
+METHODDEF(boolean) encode_mcu_AC_first JPP((j_compress_ptr cinfo,
+					    JBLOCKROW *MCU_data));
+METHODDEF(boolean) encode_mcu_DC_refine JPP((j_compress_ptr cinfo,
+					     JBLOCKROW *MCU_data));
+METHODDEF(boolean) encode_mcu_AC_refine JPP((j_compress_ptr cinfo,
+					     JBLOCKROW *MCU_data));
+METHODDEF(void) finish_pass_phuff JPP((j_compress_ptr cinfo));
+METHODDEF(void) finish_pass_gather_phuff JPP((j_compress_ptr cinfo));
+
+
+/*
+ * Initialize for a Huffman-compressed scan using progressive JPEG.
+ */
+
+METHODDEF(void)
+start_pass_phuff (j_compress_ptr cinfo, boolean gather_statistics)
+{  
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  boolean is_DC_band;
+  int ci, tbl;
+  jpeg_component_info * compptr;
+
+  entropy->cinfo = cinfo;
+  entropy->gather_statistics = gather_statistics;
+
+  is_DC_band = (cinfo->Ss == 0);
+
+  /* We assume jcmaster.c already validated the scan parameters. */
+
+  /* Select execution routines */
+  if (cinfo->Ah == 0) {
+    if (is_DC_band)
+      entropy->pub.encode_mcu = encode_mcu_DC_first;
+    else
+      entropy->pub.encode_mcu = encode_mcu_AC_first;
+  } else {
+    if (is_DC_band)
+      entropy->pub.encode_mcu = encode_mcu_DC_refine;
+    else {
+      entropy->pub.encode_mcu = encode_mcu_AC_refine;
+      /* AC refinement needs a correction bit buffer */
+      if (entropy->bit_buffer == NULL)
+	entropy->bit_buffer = (char *)
+	  (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				      MAX_CORR_BITS * SIZEOF(char));
+    }
+  }
+  if (gather_statistics)
+    entropy->pub.finish_pass = finish_pass_gather_phuff;
+  else
+    entropy->pub.finish_pass = finish_pass_phuff;
+
+  /* Only DC coefficients may be interleaved, so cinfo->comps_in_scan = 1
+   * for AC coefficients.
+   */
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    /* Initialize DC predictions to 0 */
+    entropy->last_dc_val[ci] = 0;
+    /* Get table index */
+    if (is_DC_band) {
+      if (cinfo->Ah != 0)	/* DC refinement needs no table */
+	continue;
+      tbl = compptr->dc_tbl_no;
+    } else {
+      entropy->ac_tbl_no = tbl = compptr->ac_tbl_no;
+    }
+    if (gather_statistics) {
+      /* Check for invalid table index */
+      /* (make_c_derived_tbl does this in the other path) */
+      if (tbl < 0 || tbl >= NUM_HUFF_TBLS)
+        ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tbl);
+      /* Allocate and zero the statistics tables */
+      /* Note that jpeg_gen_optimal_table expects 257 entries in each table! */
+      if (entropy->count_ptrs[tbl] == NULL)
+	entropy->count_ptrs[tbl] = (long *)
+	  (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				      257 * SIZEOF(long));
+      MEMZERO(entropy->count_ptrs[tbl], 257 * SIZEOF(long));
+    } else {
+      /* Compute derived values for Huffman table */
+      /* We may do this more than once for a table, but it's not expensive */
+      jpeg_make_c_derived_tbl(cinfo, is_DC_band, tbl,
+			      & entropy->derived_tbls[tbl]);
+    }
+  }
+
+  /* Initialize AC stuff */
+  entropy->EOBRUN = 0;
+  entropy->BE = 0;
+
+  /* Initialize bit buffer to empty */
+  entropy->put_buffer = 0;
+  entropy->put_bits = 0;
+
+  /* Initialize restart stuff */
+  entropy->restarts_to_go = cinfo->restart_interval;
+  entropy->next_restart_num = 0;
+}
+
+
+/* Outputting bytes to the file.
+ * NB: these must be called only when actually outputting,
+ * that is, entropy->gather_statistics == FALSE.
+ */
+
+/* Emit a byte */
+#define emit_byte(entropy,val)  \
+	{ *(entropy)->next_output_byte++ = (JOCTET) (val);  \
+	  if (--(entropy)->free_in_buffer == 0)  \
+	    dump_buffer(entropy); }
+
+
+LOCAL(void)
+dump_buffer (phuff_entropy_ptr entropy)
+/* Empty the output buffer; we do not support suspension in this module. */
+{
+  struct jpeg_destination_mgr * dest = entropy->cinfo->dest;
+
+  if (! (*dest->empty_output_buffer) (entropy->cinfo))
+    ERREXIT(entropy->cinfo, JERR_CANT_SUSPEND);
+  /* After a successful buffer dump, must reset buffer pointers */
+  entropy->next_output_byte = dest->next_output_byte;
+  entropy->free_in_buffer = dest->free_in_buffer;
+}
+
+
+/* Outputting bits to the file */
+
+/* Only the right 24 bits of put_buffer are used; the valid bits are
+ * left-justified in this part.  At most 16 bits can be passed to emit_bits
+ * in one call, and we never retain more than 7 bits in put_buffer
+ * between calls, so 24 bits are sufficient.
+ */
+
+INLINE
+LOCAL(void)
+emit_bits (phuff_entropy_ptr entropy, unsigned int code, int size)
+/* Emit some bits, unless we are in gather mode */
+{
+  /* This routine is heavily used, so it's worth coding tightly. */
+  register INT32 put_buffer = (INT32) code;
+  register int put_bits = entropy->put_bits;
+
+  /* if size is 0, caller used an invalid Huffman table entry */
+  if (size == 0)
+    ERREXIT(entropy->cinfo, JERR_HUFF_MISSING_CODE);
+
+  if (entropy->gather_statistics)
+    return;			/* do nothing if we're only getting stats */
+
+  put_buffer &= (((INT32) 1)<<size) - 1; /* mask off any extra bits in code */
+  
+  put_bits += size;		/* new number of bits in buffer */
+  
+  put_buffer <<= 24 - put_bits; /* align incoming bits */
+
+  put_buffer |= entropy->put_buffer; /* and merge with old buffer contents */
+
+  while (put_bits >= 8) {
+    int c = (int) ((put_buffer >> 16) & 0xFF);
+    
+    emit_byte(entropy, c);
+    if (c == 0xFF) {		/* need to stuff a zero byte? */
+      emit_byte(entropy, 0);
+    }
+    put_buffer <<= 8;
+    put_bits -= 8;
+  }
+
+  entropy->put_buffer = put_buffer; /* update variables */
+  entropy->put_bits = put_bits;
+}
+
+
+LOCAL(void)
+flush_bits (phuff_entropy_ptr entropy)
+{
+  emit_bits(entropy, 0x7F, 7); /* fill any partial byte with ones */
+  entropy->put_buffer = 0;     /* and reset bit-buffer to empty */
+  entropy->put_bits = 0;
+}
+
+
+/*
+ * Emit (or just count) a Huffman symbol.
+ */
+
+INLINE
+LOCAL(void)
+emit_symbol (phuff_entropy_ptr entropy, int tbl_no, int symbol)
+{
+  if (entropy->gather_statistics)
+    entropy->count_ptrs[tbl_no][symbol]++;
+  else {
+    c_derived_tbl * tbl = entropy->derived_tbls[tbl_no];
+    emit_bits(entropy, tbl->ehufco[symbol], tbl->ehufsi[symbol]);
+  }
+}
+
+
+/*
+ * Emit bits from a correction bit buffer.
+ */
+
+LOCAL(void)
+emit_buffered_bits (phuff_entropy_ptr entropy, char * bufstart,
+		    unsigned int nbits)
+{
+  if (entropy->gather_statistics)
+    return;			/* no real work */
+
+  while (nbits > 0) {
+    emit_bits(entropy, (unsigned int) (*bufstart), 1);
+    bufstart++;
+    nbits--;
+  }
+}
+
+
+/*
+ * Emit any pending EOBRUN symbol.
+ */
+
+LOCAL(void)
+emit_eobrun (phuff_entropy_ptr entropy)
+{
+  register int temp, nbits;
+
+  if (entropy->EOBRUN > 0) {	/* if there is any pending EOBRUN */
+    temp = entropy->EOBRUN;
+    nbits = 0;
+    while ((temp >>= 1))
+      nbits++;
+    /* safety check: shouldn't happen given limited correction-bit buffer */
+    if (nbits > 14)
+      ERREXIT(entropy->cinfo, JERR_HUFF_MISSING_CODE);
+
+    emit_symbol(entropy, entropy->ac_tbl_no, nbits << 4);
+    if (nbits)
+      emit_bits(entropy, entropy->EOBRUN, nbits);
+
+    entropy->EOBRUN = 0;
+
+    /* Emit any buffered correction bits */
+    emit_buffered_bits(entropy, entropy->bit_buffer, entropy->BE);
+    entropy->BE = 0;
+  }
+}
+
+
+/*
+ * Emit a restart marker & resynchronize predictions.
+ */
+
+LOCAL(void)
+emit_restart (phuff_entropy_ptr entropy, int restart_num)
+{
+  int ci;
+
+  emit_eobrun(entropy);
+
+  if (! entropy->gather_statistics) {
+    flush_bits(entropy);
+    emit_byte(entropy, 0xFF);
+    emit_byte(entropy, JPEG_RST0 + restart_num);
+  }
+
+  if (entropy->cinfo->Ss == 0) {
+    /* Re-initialize DC predictions to 0 */
+    for (ci = 0; ci < entropy->cinfo->comps_in_scan; ci++)
+      entropy->last_dc_val[ci] = 0;
+  } else {
+    /* Re-initialize all AC-related fields to 0 */
+    entropy->EOBRUN = 0;
+    entropy->BE = 0;
+  }
+}
+
+
+/*
+ * MCU encoding for DC initial scan (either spectral selection,
+ * or first pass of successive approximation).
+ */
+
+METHODDEF(boolean)
+encode_mcu_DC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
+{
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  register int temp, temp2;
+  register int nbits;
+  int blkn, ci;
+  int Al = cinfo->Al;
+  JBLOCKROW block;
+  jpeg_component_info * compptr;
+  ISHIFT_TEMPS
+
+  entropy->next_output_byte = cinfo->dest->next_output_byte;
+  entropy->free_in_buffer = cinfo->dest->free_in_buffer;
+
+  /* Emit restart marker if needed */
+  if (cinfo->restart_interval)
+    if (entropy->restarts_to_go == 0)
+      emit_restart(entropy, entropy->next_restart_num);
+
+  /* Encode the MCU data blocks */
+  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+    block = MCU_data[blkn];
+    ci = cinfo->MCU_membership[blkn];
+    compptr = cinfo->cur_comp_info[ci];
+
+    /* Compute the DC value after the required point transform by Al.
+     * This is simply an arithmetic right shift.
+     */
+    temp2 = IRIGHT_SHIFT((int) ((*block)[0]), Al);
+
+    /* DC differences are figured on the point-transformed values. */
+    temp = temp2 - entropy->last_dc_val[ci];
+    entropy->last_dc_val[ci] = temp2;
+
+    /* Encode the DC coefficient difference per section G.1.2.1 */
+    temp2 = temp;
+    if (temp < 0) {
+      temp = -temp;		/* temp is abs value of input */
+      /* For a negative input, want temp2 = bitwise complement of abs(input) */
+      /* This code assumes we are on a two's complement machine */
+      temp2--;
+    }
+    
+    /* Find the number of bits needed for the magnitude of the coefficient */
+    nbits = 0;
+    while (temp) {
+      nbits++;
+      temp >>= 1;
+    }
+    /* Check for out-of-range coefficient values.
+     * Since we're encoding a difference, the range limit is twice as much.
+     */
+    if (nbits > MAX_COEF_BITS+1)
+      ERREXIT(cinfo, JERR_BAD_DCT_COEF);
+    
+    /* Count/emit the Huffman-coded symbol for the number of bits */
+    emit_symbol(entropy, compptr->dc_tbl_no, nbits);
+    
+    /* Emit that number of bits of the value, if positive, */
+    /* or the complement of its magnitude, if negative. */
+    if (nbits)			/* emit_bits rejects calls with size 0 */
+      emit_bits(entropy, (unsigned int) temp2, nbits);
+  }
+
+  cinfo->dest->next_output_byte = entropy->next_output_byte;
+  cinfo->dest->free_in_buffer = entropy->free_in_buffer;
+
+  /* Update restart-interval state too */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0) {
+      entropy->restarts_to_go = cinfo->restart_interval;
+      entropy->next_restart_num++;
+      entropy->next_restart_num &= 7;
+    }
+    entropy->restarts_to_go--;
+  }
+
+  return TRUE;
+}
+
+
+/*
+ * MCU encoding for AC initial scan (either spectral selection,
+ * or first pass of successive approximation).
+ */
+
+METHODDEF(boolean)
+encode_mcu_AC_first (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
+{
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  register int temp, temp2;
+  register int nbits;
+  register int r, k;
+  int Se = cinfo->Se;
+  int Al = cinfo->Al;
+  JBLOCKROW block;
+
+  entropy->next_output_byte = cinfo->dest->next_output_byte;
+  entropy->free_in_buffer = cinfo->dest->free_in_buffer;
+
+  /* Emit restart marker if needed */
+  if (cinfo->restart_interval)
+    if (entropy->restarts_to_go == 0)
+      emit_restart(entropy, entropy->next_restart_num);
+
+  /* Encode the MCU data block */
+  block = MCU_data[0];
+
+  /* Encode the AC coefficients per section G.1.2.2, fig. G.3 */
+  
+  r = 0;			/* r = run length of zeros */
+   
+  for (k = cinfo->Ss; k <= Se; k++) {
+    if ((temp = (*block)[jpeg_natural_order[k]]) == 0) {
+      r++;
+      continue;
+    }
+    /* We must apply the point transform by Al.  For AC coefficients this
+     * is an integer division with rounding towards 0.  To do this portably
+     * in C, we shift after obtaining the absolute value; so the code is
+     * interwoven with finding the abs value (temp) and output bits (temp2).
+     */
+    if (temp < 0) {
+      temp = -temp;		/* temp is abs value of input */
+      temp >>= Al;		/* apply the point transform */
+      /* For a negative coef, want temp2 = bitwise complement of abs(coef) */
+      temp2 = ~temp;
+    } else {
+      temp >>= Al;		/* apply the point transform */
+      temp2 = temp;
+    }
+    /* Watch out for case that nonzero coef is zero after point transform */
+    if (temp == 0) {
+      r++;
+      continue;
+    }
+
+    /* Emit any pending EOBRUN */
+    if (entropy->EOBRUN > 0)
+      emit_eobrun(entropy);
+    /* if run length > 15, must emit special run-length-16 codes (0xF0) */
+    while (r > 15) {
+      emit_symbol(entropy, entropy->ac_tbl_no, 0xF0);
+      r -= 16;
+    }
+
+    /* Find the number of bits needed for the magnitude of the coefficient */
+    nbits = 1;			/* there must be at least one 1 bit */
+    while ((temp >>= 1))
+      nbits++;
+    /* Check for out-of-range coefficient values */
+    if (nbits > MAX_COEF_BITS)
+      ERREXIT(cinfo, JERR_BAD_DCT_COEF);
+
+    /* Count/emit Huffman symbol for run length / number of bits */
+    emit_symbol(entropy, entropy->ac_tbl_no, (r << 4) + nbits);
+
+    /* Emit that number of bits of the value, if positive, */
+    /* or the complement of its magnitude, if negative. */
+    emit_bits(entropy, (unsigned int) temp2, nbits);
+
+    r = 0;			/* reset zero run length */
+  }
+
+  if (r > 0) {			/* If there are trailing zeroes, */
+    entropy->EOBRUN++;		/* count an EOB */
+    if (entropy->EOBRUN == 0x7FFF)
+      emit_eobrun(entropy);	/* force it out to avoid overflow */
+  }
+
+  cinfo->dest->next_output_byte = entropy->next_output_byte;
+  cinfo->dest->free_in_buffer = entropy->free_in_buffer;
+
+  /* Update restart-interval state too */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0) {
+      entropy->restarts_to_go = cinfo->restart_interval;
+      entropy->next_restart_num++;
+      entropy->next_restart_num &= 7;
+    }
+    entropy->restarts_to_go--;
+  }
+
+  return TRUE;
+}
+
+
+/*
+ * MCU encoding for DC successive approximation refinement scan.
+ * Note: we assume such scans can be multi-component, although the spec
+ * is not very clear on the point.
+ */
+
+METHODDEF(boolean)
+encode_mcu_DC_refine (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
+{
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  register int temp;
+  int blkn;
+  int Al = cinfo->Al;
+  JBLOCKROW block;
+
+  entropy->next_output_byte = cinfo->dest->next_output_byte;
+  entropy->free_in_buffer = cinfo->dest->free_in_buffer;
+
+  /* Emit restart marker if needed */
+  if (cinfo->restart_interval)
+    if (entropy->restarts_to_go == 0)
+      emit_restart(entropy, entropy->next_restart_num);
+
+  /* Encode the MCU data blocks */
+  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+    block = MCU_data[blkn];
+
+    /* We simply emit the Al'th bit of the DC coefficient value. */
+    temp = (*block)[0];
+    emit_bits(entropy, (unsigned int) (temp >> Al), 1);
+  }
+
+  cinfo->dest->next_output_byte = entropy->next_output_byte;
+  cinfo->dest->free_in_buffer = entropy->free_in_buffer;
+
+  /* Update restart-interval state too */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0) {
+      entropy->restarts_to_go = cinfo->restart_interval;
+      entropy->next_restart_num++;
+      entropy->next_restart_num &= 7;
+    }
+    entropy->restarts_to_go--;
+  }
+
+  return TRUE;
+}
+
+
+/*
+ * MCU encoding for AC successive approximation refinement scan.
+ */
+
+METHODDEF(boolean)
+encode_mcu_AC_refine (j_compress_ptr cinfo, JBLOCKROW *MCU_data)
+{
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  register int temp;
+  register int r, k;
+  int EOB;
+  char *BR_buffer;
+  unsigned int BR;
+  int Se = cinfo->Se;
+  int Al = cinfo->Al;
+  JBLOCKROW block;
+  int absvalues[DCTSIZE2];
+
+  entropy->next_output_byte = cinfo->dest->next_output_byte;
+  entropy->free_in_buffer = cinfo->dest->free_in_buffer;
+
+  /* Emit restart marker if needed */
+  if (cinfo->restart_interval)
+    if (entropy->restarts_to_go == 0)
+      emit_restart(entropy, entropy->next_restart_num);
+
+  /* Encode the MCU data block */
+  block = MCU_data[0];
+
+  /* It is convenient to make a pre-pass to determine the transformed
+   * coefficients' absolute values and the EOB position.
+   */
+  EOB = 0;
+  for (k = cinfo->Ss; k <= Se; k++) {
+    temp = (*block)[jpeg_natural_order[k]];
+    /* We must apply the point transform by Al.  For AC coefficients this
+     * is an integer division with rounding towards 0.  To do this portably
+     * in C, we shift after obtaining the absolute value.
+     */
+    if (temp < 0)
+      temp = -temp;		/* temp is abs value of input */
+    temp >>= Al;		/* apply the point transform */
+    absvalues[k] = temp;	/* save abs value for main pass */
+    if (temp == 1)
+      EOB = k;			/* EOB = index of last newly-nonzero coef */
+  }
+
+  /* Encode the AC coefficients per section G.1.2.3, fig. G.7 */
+  
+  r = 0;			/* r = run length of zeros */
+  BR = 0;			/* BR = count of buffered bits added now */
+  BR_buffer = entropy->bit_buffer + entropy->BE; /* Append bits to buffer */
+
+  for (k = cinfo->Ss; k <= Se; k++) {
+    if ((temp = absvalues[k]) == 0) {
+      r++;
+      continue;
+    }
+
+    /* Emit any required ZRLs, but not if they can be folded into EOB */
+    while (r > 15 && k <= EOB) {
+      /* emit any pending EOBRUN and the BE correction bits */
+      emit_eobrun(entropy);
+      /* Emit ZRL */
+      emit_symbol(entropy, entropy->ac_tbl_no, 0xF0);
+      r -= 16;
+      /* Emit buffered correction bits that must be associated with ZRL */
+      emit_buffered_bits(entropy, BR_buffer, BR);
+      BR_buffer = entropy->bit_buffer; /* BE bits are gone now */
+      BR = 0;
+    }
+
+    /* If the coef was previously nonzero, it only needs a correction bit.
+     * NOTE: a straight translation of the spec's figure G.7 would suggest
+     * that we also need to test r > 15.  But if r > 15, we can only get here
+     * if k > EOB, which implies that this coefficient is not 1.
+     */
+    if (temp > 1) {
+      /* The correction bit is the next bit of the absolute value. */
+      BR_buffer[BR++] = (char) (temp & 1);
+      continue;
+    }
+
+    /* Emit any pending EOBRUN and the BE correction bits */
+    emit_eobrun(entropy);
+
+    /* Count/emit Huffman symbol for run length / number of bits */
+    emit_symbol(entropy, entropy->ac_tbl_no, (r << 4) + 1);
+
+    /* Emit output bit for newly-nonzero coef */
+    temp = ((*block)[jpeg_natural_order[k]] < 0) ? 0 : 1;
+    emit_bits(entropy, (unsigned int) temp, 1);
+
+    /* Emit buffered correction bits that must be associated with this code */
+    emit_buffered_bits(entropy, BR_buffer, BR);
+    BR_buffer = entropy->bit_buffer; /* BE bits are gone now */
+    BR = 0;
+    r = 0;			/* reset zero run length */
+  }
+
+  if (r > 0 || BR > 0) {	/* If there are trailing zeroes, */
+    entropy->EOBRUN++;		/* count an EOB */
+    entropy->BE += BR;		/* concat my correction bits to older ones */
+    /* We force out the EOB if we risk either:
+     * 1. overflow of the EOB counter;
+     * 2. overflow of the correction bit buffer during the next MCU.
+     */
+    if (entropy->EOBRUN == 0x7FFF || entropy->BE > (MAX_CORR_BITS-DCTSIZE2+1))
+      emit_eobrun(entropy);
+  }
+
+  cinfo->dest->next_output_byte = entropy->next_output_byte;
+  cinfo->dest->free_in_buffer = entropy->free_in_buffer;
+
+  /* Update restart-interval state too */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0) {
+      entropy->restarts_to_go = cinfo->restart_interval;
+      entropy->next_restart_num++;
+      entropy->next_restart_num &= 7;
+    }
+    entropy->restarts_to_go--;
+  }
+
+  return TRUE;
+}
+
+
+/*
+ * Finish up at the end of a Huffman-compressed progressive scan.
+ */
+
+METHODDEF(void)
+finish_pass_phuff (j_compress_ptr cinfo)
+{   
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+
+  entropy->next_output_byte = cinfo->dest->next_output_byte;
+  entropy->free_in_buffer = cinfo->dest->free_in_buffer;
+
+  /* Flush out any buffered data */
+  emit_eobrun(entropy);
+  flush_bits(entropy);
+
+  cinfo->dest->next_output_byte = entropy->next_output_byte;
+  cinfo->dest->free_in_buffer = entropy->free_in_buffer;
+}
+
+
+/*
+ * Finish up a statistics-gathering pass and create the new Huffman tables.
+ */
+
+METHODDEF(void)
+finish_pass_gather_phuff (j_compress_ptr cinfo)
+{
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  boolean is_DC_band;
+  int ci, tbl;
+  jpeg_component_info * compptr;
+  JHUFF_TBL **htblptr;
+  boolean did[NUM_HUFF_TBLS];
+
+  /* Flush out buffered data (all we care about is counting the EOB symbol) */
+  emit_eobrun(entropy);
+
+  is_DC_band = (cinfo->Ss == 0);
+
+  /* It's important not to apply jpeg_gen_optimal_table more than once
+   * per table, because it clobbers the input frequency counts!
+   */
+  MEMZERO(did, SIZEOF(did));
+
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    if (is_DC_band) {
+      if (cinfo->Ah != 0)	/* DC refinement needs no table */
+	continue;
+      tbl = compptr->dc_tbl_no;
+    } else {
+      tbl = compptr->ac_tbl_no;
+    }
+    if (! did[tbl]) {
+      if (is_DC_band)
+        htblptr = & cinfo->dc_huff_tbl_ptrs[tbl];
+      else
+        htblptr = & cinfo->ac_huff_tbl_ptrs[tbl];
+      if (*htblptr == NULL)
+        *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
+      jpeg_gen_optimal_table(cinfo, *htblptr, entropy->count_ptrs[tbl]);
+      did[tbl] = TRUE;
+    }
+  }
+}
+
+
+/*
+ * Module initialization routine for progressive Huffman entropy encoding.
+ */
+
+GLOBAL(void)
+jinit_phuff_encoder (j_compress_ptr cinfo)
+{
+  phuff_entropy_ptr entropy;
+  int i;
+
+  entropy = (phuff_entropy_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(phuff_entropy_encoder));
+  cinfo->entropy = (struct jpeg_entropy_encoder *) entropy;
+  entropy->pub.start_pass = start_pass_phuff;
+
+  /* Mark tables unallocated */
+  for (i = 0; i < NUM_HUFF_TBLS; i++) {
+    entropy->derived_tbls[i] = NULL;
+    entropy->count_ptrs[i] = NULL;
+  }
+  entropy->bit_buffer = NULL;	/* needed only in AC refinement scan */
+}
+
+#endif /* C_PROGRESSIVE_SUPPORTED */
diff --git a/common/jpeg/jcprepct.c b/common/jpeg/jcprepct.c
new file mode 100644
index 00000000..fa93333d
--- /dev/null
+++ b/common/jpeg/jcprepct.c
@@ -0,0 +1,354 @@
+/*
+ * jcprepct.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the compression preprocessing controller.
+ * This controller manages the color conversion, downsampling,
+ * and edge expansion steps.
+ *
+ * Most of the complexity here is associated with buffering input rows
+ * as required by the downsampler.  See the comments at the head of
+ * jcsample.c for the downsampler's needs.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* At present, jcsample.c can request context rows only for smoothing.
+ * In the future, we might also need context rows for CCIR601 sampling
+ * or other more-complex downsampling procedures.  The code to support
+ * context rows should be compiled only if needed.
+ */
+#ifdef INPUT_SMOOTHING_SUPPORTED
+#define CONTEXT_ROWS_SUPPORTED
+#endif
+
+
+/*
+ * For the simple (no-context-row) case, we just need to buffer one
+ * row group's worth of pixels for the downsampling step.  At the bottom of
+ * the image, we pad to a full row group by replicating the last pixel row.
+ * The downsampler's last output row is then replicated if needed to pad
+ * out to a full iMCU row.
+ *
+ * When providing context rows, we must buffer three row groups' worth of
+ * pixels.  Three row groups are physically allocated, but the row pointer
+ * arrays are made five row groups high, with the extra pointers above and
+ * below "wrapping around" to point to the last and first real row groups.
+ * This allows the downsampler to access the proper context rows.
+ * At the top and bottom of the image, we create dummy context rows by
+ * copying the first or last real pixel row.  This copying could be avoided
+ * by pointer hacking as is done in jdmainct.c, but it doesn't seem worth the
+ * trouble on the compression side.
+ */
+
+
+/* Private buffer controller object */
+
+typedef struct {
+  struct jpeg_c_prep_controller pub; /* public fields */
+
+  /* Downsampling input buffer.  This buffer holds color-converted data
+   * until we have enough to do a downsample step.
+   */
+  JSAMPARRAY color_buf[MAX_COMPONENTS];
+
+  JDIMENSION rows_to_go;	/* counts rows remaining in source image */
+  int next_buf_row;		/* index of next row to store in color_buf */
+
+#ifdef CONTEXT_ROWS_SUPPORTED	/* only needed for context case */
+  int this_row_group;		/* starting row index of group to process */
+  int next_buf_stop;		/* downsample when we reach this index */
+#endif
+} my_prep_controller;
+
+typedef my_prep_controller * my_prep_ptr;
+
+
+/*
+ * Initialize for a processing pass.
+ */
+
+METHODDEF(void)
+start_pass_prep (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
+{
+  my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
+
+  if (pass_mode != JBUF_PASS_THRU)
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+
+  /* Initialize total-height counter for detecting bottom of image */
+  prep->rows_to_go = cinfo->image_height;
+  /* Mark the conversion buffer empty */
+  prep->next_buf_row = 0;
+#ifdef CONTEXT_ROWS_SUPPORTED
+  /* Preset additional state variables for context mode.
+   * These aren't used in non-context mode, so we needn't test which mode.
+   */
+  prep->this_row_group = 0;
+  /* Set next_buf_stop to stop after two row groups have been read in. */
+  prep->next_buf_stop = 2 * cinfo->max_v_samp_factor;
+#endif
+}
+
+
+/*
+ * Expand an image vertically from height input_rows to height output_rows,
+ * by duplicating the bottom row.
+ */
+
+LOCAL(void)
+expand_bottom_edge (JSAMPARRAY image_data, JDIMENSION num_cols,
+		    int input_rows, int output_rows)
+{
+  register int row;
+
+  for (row = input_rows; row < output_rows; row++) {
+    jcopy_sample_rows(image_data, input_rows-1, image_data, row,
+		      1, num_cols);
+  }
+}
+
+
+/*
+ * Process some data in the simple no-context case.
+ *
+ * Preprocessor output data is counted in "row groups".  A row group
+ * is defined to be v_samp_factor sample rows of each component.
+ * Downsampling will produce this much data from each max_v_samp_factor
+ * input rows.
+ */
+
+METHODDEF(void)
+pre_process_data (j_compress_ptr cinfo,
+		  JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
+		  JDIMENSION in_rows_avail,
+		  JSAMPIMAGE output_buf, JDIMENSION *out_row_group_ctr,
+		  JDIMENSION out_row_groups_avail)
+{
+  my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
+  int numrows, ci;
+  JDIMENSION inrows;
+  jpeg_component_info * compptr;
+
+  while (*in_row_ctr < in_rows_avail &&
+	 *out_row_group_ctr < out_row_groups_avail) {
+    /* Do color conversion to fill the conversion buffer. */
+    inrows = in_rows_avail - *in_row_ctr;
+    numrows = cinfo->max_v_samp_factor - prep->next_buf_row;
+    numrows = (int) MIN((JDIMENSION) numrows, inrows);
+    (*cinfo->cconvert->color_convert) (cinfo, input_buf + *in_row_ctr,
+				       prep->color_buf,
+				       (JDIMENSION) prep->next_buf_row,
+				       numrows);
+    *in_row_ctr += numrows;
+    prep->next_buf_row += numrows;
+    prep->rows_to_go -= numrows;
+    /* If at bottom of image, pad to fill the conversion buffer. */
+    if (prep->rows_to_go == 0 &&
+	prep->next_buf_row < cinfo->max_v_samp_factor) {
+      for (ci = 0; ci < cinfo->num_components; ci++) {
+	expand_bottom_edge(prep->color_buf[ci], cinfo->image_width,
+			   prep->next_buf_row, cinfo->max_v_samp_factor);
+      }
+      prep->next_buf_row = cinfo->max_v_samp_factor;
+    }
+    /* If we've filled the conversion buffer, empty it. */
+    if (prep->next_buf_row == cinfo->max_v_samp_factor) {
+      (*cinfo->downsample->downsample) (cinfo,
+					prep->color_buf, (JDIMENSION) 0,
+					output_buf, *out_row_group_ctr);
+      prep->next_buf_row = 0;
+      (*out_row_group_ctr)++;
+    }
+    /* If at bottom of image, pad the output to a full iMCU height.
+     * Note we assume the caller is providing a one-iMCU-height output buffer!
+     */
+    if (prep->rows_to_go == 0 &&
+	*out_row_group_ctr < out_row_groups_avail) {
+      for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	   ci++, compptr++) {
+	expand_bottom_edge(output_buf[ci],
+			   compptr->width_in_blocks * DCTSIZE,
+			   (int) (*out_row_group_ctr * compptr->v_samp_factor),
+			   (int) (out_row_groups_avail * compptr->v_samp_factor));
+      }
+      *out_row_group_ctr = out_row_groups_avail;
+      break;			/* can exit outer loop without test */
+    }
+  }
+}
+
+
+#ifdef CONTEXT_ROWS_SUPPORTED
+
+/*
+ * Process some data in the context case.
+ */
+
+METHODDEF(void)
+pre_process_context (j_compress_ptr cinfo,
+		     JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
+		     JDIMENSION in_rows_avail,
+		     JSAMPIMAGE output_buf, JDIMENSION *out_row_group_ctr,
+		     JDIMENSION out_row_groups_avail)
+{
+  my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
+  int numrows, ci;
+  int buf_height = cinfo->max_v_samp_factor * 3;
+  JDIMENSION inrows;
+
+  while (*out_row_group_ctr < out_row_groups_avail) {
+    if (*in_row_ctr < in_rows_avail) {
+      /* Do color conversion to fill the conversion buffer. */
+      inrows = in_rows_avail - *in_row_ctr;
+      numrows = prep->next_buf_stop - prep->next_buf_row;
+      numrows = (int) MIN((JDIMENSION) numrows, inrows);
+      (*cinfo->cconvert->color_convert) (cinfo, input_buf + *in_row_ctr,
+					 prep->color_buf,
+					 (JDIMENSION) prep->next_buf_row,
+					 numrows);
+      /* Pad at top of image, if first time through */
+      if (prep->rows_to_go == cinfo->image_height) {
+	for (ci = 0; ci < cinfo->num_components; ci++) {
+	  int row;
+	  for (row = 1; row <= cinfo->max_v_samp_factor; row++) {
+	    jcopy_sample_rows(prep->color_buf[ci], 0,
+			      prep->color_buf[ci], -row,
+			      1, cinfo->image_width);
+	  }
+	}
+      }
+      *in_row_ctr += numrows;
+      prep->next_buf_row += numrows;
+      prep->rows_to_go -= numrows;
+    } else {
+      /* Return for more data, unless we are at the bottom of the image. */
+      if (prep->rows_to_go != 0)
+	break;
+      /* When at bottom of image, pad to fill the conversion buffer. */
+      if (prep->next_buf_row < prep->next_buf_stop) {
+	for (ci = 0; ci < cinfo->num_components; ci++) {
+	  expand_bottom_edge(prep->color_buf[ci], cinfo->image_width,
+			     prep->next_buf_row, prep->next_buf_stop);
+	}
+	prep->next_buf_row = prep->next_buf_stop;
+      }
+    }
+    /* If we've gotten enough data, downsample a row group. */
+    if (prep->next_buf_row == prep->next_buf_stop) {
+      (*cinfo->downsample->downsample) (cinfo,
+					prep->color_buf,
+					(JDIMENSION) prep->this_row_group,
+					output_buf, *out_row_group_ctr);
+      (*out_row_group_ctr)++;
+      /* Advance pointers with wraparound as necessary. */
+      prep->this_row_group += cinfo->max_v_samp_factor;
+      if (prep->this_row_group >= buf_height)
+	prep->this_row_group = 0;
+      if (prep->next_buf_row >= buf_height)
+	prep->next_buf_row = 0;
+      prep->next_buf_stop = prep->next_buf_row + cinfo->max_v_samp_factor;
+    }
+  }
+}
+
+
+/*
+ * Create the wrapped-around downsampling input buffer needed for context mode.
+ */
+
+LOCAL(void)
+create_context_buffer (j_compress_ptr cinfo)
+{
+  my_prep_ptr prep = (my_prep_ptr) cinfo->prep;
+  int rgroup_height = cinfo->max_v_samp_factor;
+  int ci, i;
+  jpeg_component_info * compptr;
+  JSAMPARRAY true_buffer, fake_buffer;
+
+  /* Grab enough space for fake row pointers for all the components;
+   * we need five row groups' worth of pointers for each component.
+   */
+  fake_buffer = (JSAMPARRAY)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(cinfo->num_components * 5 * rgroup_height) *
+				SIZEOF(JSAMPROW));
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Allocate the actual buffer space (3 row groups) for this component.
+     * We make the buffer wide enough to allow the downsampler to edge-expand
+     * horizontally within the buffer, if it so chooses.
+     */
+    true_buffer = (*cinfo->mem->alloc_sarray)
+      ((j_common_ptr) cinfo, JPOOL_IMAGE,
+       (JDIMENSION) (((long) compptr->width_in_blocks * DCTSIZE *
+		      cinfo->max_h_samp_factor) / compptr->h_samp_factor),
+       (JDIMENSION) (3 * rgroup_height));
+    /* Copy true buffer row pointers into the middle of the fake row array */
+    MEMCOPY(fake_buffer + rgroup_height, true_buffer,
+	    3 * rgroup_height * SIZEOF(JSAMPROW));
+    /* Fill in the above and below wraparound pointers */
+    for (i = 0; i < rgroup_height; i++) {
+      fake_buffer[i] = true_buffer[2 * rgroup_height + i];
+      fake_buffer[4 * rgroup_height + i] = true_buffer[i];
+    }
+    prep->color_buf[ci] = fake_buffer + rgroup_height;
+    fake_buffer += 5 * rgroup_height; /* point to space for next component */
+  }
+}
+
+#endif /* CONTEXT_ROWS_SUPPORTED */
+
+
+/*
+ * Initialize preprocessing controller.
+ */
+
+GLOBAL(void)
+jinit_c_prep_controller (j_compress_ptr cinfo, boolean need_full_buffer)
+{
+  my_prep_ptr prep;
+  int ci;
+  jpeg_component_info * compptr;
+
+  if (need_full_buffer)		/* safety check */
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+
+  prep = (my_prep_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_prep_controller));
+  cinfo->prep = (struct jpeg_c_prep_controller *) prep;
+  prep->pub.start_pass = start_pass_prep;
+
+  /* Allocate the color conversion buffer.
+   * We make the buffer wide enough to allow the downsampler to edge-expand
+   * horizontally within the buffer, if it so chooses.
+   */
+  if (cinfo->downsample->need_context_rows) {
+    /* Set up to provide context rows */
+#ifdef CONTEXT_ROWS_SUPPORTED
+    prep->pub.pre_process_data = pre_process_context;
+    create_context_buffer(cinfo);
+#else
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+  } else {
+    /* No context, just make it tall enough for one row group */
+    prep->pub.pre_process_data = pre_process_data;
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	 ci++, compptr++) {
+      prep->color_buf[ci] = (*cinfo->mem->alloc_sarray)
+	((j_common_ptr) cinfo, JPOOL_IMAGE,
+	 (JDIMENSION) (((long) compptr->width_in_blocks * DCTSIZE *
+			cinfo->max_h_samp_factor) / compptr->h_samp_factor),
+	 (JDIMENSION) cinfo->max_v_samp_factor);
+    }
+  }
+}
diff --git a/common/jpeg/jcsample.c b/common/jpeg/jcsample.c
new file mode 100644
index 00000000..212ec875
--- /dev/null
+++ b/common/jpeg/jcsample.c
@@ -0,0 +1,519 @@
+/*
+ * jcsample.c
+ *
+ * Copyright (C) 1991-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains downsampling routines.
+ *
+ * Downsampling input data is counted in "row groups".  A row group
+ * is defined to be max_v_samp_factor pixel rows of each component,
+ * from which the downsampler produces v_samp_factor sample rows.
+ * A single row group is processed in each call to the downsampler module.
+ *
+ * The downsampler is responsible for edge-expansion of its output data
+ * to fill an integral number of DCT blocks horizontally.  The source buffer
+ * may be modified if it is helpful for this purpose (the source buffer is
+ * allocated wide enough to correspond to the desired output width).
+ * The caller (the prep controller) is responsible for vertical padding.
+ *
+ * The downsampler may request "context rows" by setting need_context_rows
+ * during startup.  In this case, the input arrays will contain at least
+ * one row group's worth of pixels above and below the passed-in data;
+ * the caller will create dummy rows at image top and bottom by replicating
+ * the first or last real pixel row.
+ *
+ * An excellent reference for image resampling is
+ *   Digital Image Warping, George Wolberg, 1990.
+ *   Pub. by IEEE Computer Society Press, Los Alamitos, CA. ISBN 0-8186-8944-7.
+ *
+ * The downsampling algorithm used here is a simple average of the source
+ * pixels covered by the output pixel.  The hi-falutin sampling literature
+ * refers to this as a "box filter".  In general the characteristics of a box
+ * filter are not very good, but for the specific cases we normally use (1:1
+ * and 2:1 ratios) the box is equivalent to a "triangle filter" which is not
+ * nearly so bad.  If you intend to use other sampling ratios, you'd be well
+ * advised to improve this code.
+ *
+ * A simple input-smoothing capability is provided.  This is mainly intended
+ * for cleaning up color-dithered GIF input files (if you find it inadequate,
+ * we suggest using an external filtering program such as pnmconvol).  When
+ * enabled, each input pixel P is replaced by a weighted sum of itself and its
+ * eight neighbors.  P's weight is 1-8*SF and each neighbor's weight is SF,
+ * where SF = (smoothing_factor / 1024).
+ * Currently, smoothing is only supported for 2h2v sampling factors.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Pointer to routine to downsample a single component */
+typedef JMETHOD(void, downsample1_ptr,
+		(j_compress_ptr cinfo, jpeg_component_info * compptr,
+		 JSAMPARRAY input_data, JSAMPARRAY output_data));
+
+/* Private subobject */
+
+typedef struct {
+  struct jpeg_downsampler pub;	/* public fields */
+
+  /* Downsampling method pointers, one per component */
+  downsample1_ptr methods[MAX_COMPONENTS];
+} my_downsampler;
+
+typedef my_downsampler * my_downsample_ptr;
+
+
+/*
+ * Initialize for a downsampling pass.
+ */
+
+METHODDEF(void)
+start_pass_downsample (j_compress_ptr cinfo)
+{
+  /* no work for now */
+}
+
+
+/*
+ * Expand a component horizontally from width input_cols to width output_cols,
+ * by duplicating the rightmost samples.
+ */
+
+LOCAL(void)
+expand_right_edge (JSAMPARRAY image_data, int num_rows,
+		   JDIMENSION input_cols, JDIMENSION output_cols)
+{
+  register JSAMPROW ptr;
+  register JSAMPLE pixval;
+  register int count;
+  int row;
+  int numcols = (int) (output_cols - input_cols);
+
+  if (numcols > 0) {
+    for (row = 0; row < num_rows; row++) {
+      ptr = image_data[row] + input_cols;
+      pixval = ptr[-1];		/* don't need GETJSAMPLE() here */
+      for (count = numcols; count > 0; count--)
+	*ptr++ = pixval;
+    }
+  }
+}
+
+
+/*
+ * Do downsampling for a whole row group (all components).
+ *
+ * In this version we simply downsample each component independently.
+ */
+
+METHODDEF(void)
+sep_downsample (j_compress_ptr cinfo,
+		JSAMPIMAGE input_buf, JDIMENSION in_row_index,
+		JSAMPIMAGE output_buf, JDIMENSION out_row_group_index)
+{
+  my_downsample_ptr downsample = (my_downsample_ptr) cinfo->downsample;
+  int ci;
+  jpeg_component_info * compptr;
+  JSAMPARRAY in_ptr, out_ptr;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    in_ptr = input_buf[ci] + in_row_index;
+    out_ptr = output_buf[ci] + (out_row_group_index * compptr->v_samp_factor);
+    (*downsample->methods[ci]) (cinfo, compptr, in_ptr, out_ptr);
+  }
+}
+
+
+/*
+ * Downsample pixel values of a single component.
+ * One row group is processed per call.
+ * This version handles arbitrary integral sampling ratios, without smoothing.
+ * Note that this version is not actually used for customary sampling ratios.
+ */
+
+METHODDEF(void)
+int_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
+		JSAMPARRAY input_data, JSAMPARRAY output_data)
+{
+  int inrow, outrow, h_expand, v_expand, numpix, numpix2, h, v;
+  JDIMENSION outcol, outcol_h;	/* outcol_h == outcol*h_expand */
+  JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
+  JSAMPROW inptr, outptr;
+  INT32 outvalue;
+
+  h_expand = cinfo->max_h_samp_factor / compptr->h_samp_factor;
+  v_expand = cinfo->max_v_samp_factor / compptr->v_samp_factor;
+  numpix = h_expand * v_expand;
+  numpix2 = numpix/2;
+
+  /* Expand input data enough to let all the output samples be generated
+   * by the standard loop.  Special-casing padded output would be more
+   * efficient.
+   */
+  expand_right_edge(input_data, cinfo->max_v_samp_factor,
+		    cinfo->image_width, output_cols * h_expand);
+
+  inrow = 0;
+  for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
+    outptr = output_data[outrow];
+    for (outcol = 0, outcol_h = 0; outcol < output_cols;
+	 outcol++, outcol_h += h_expand) {
+      outvalue = 0;
+      for (v = 0; v < v_expand; v++) {
+	inptr = input_data[inrow+v] + outcol_h;
+	for (h = 0; h < h_expand; h++) {
+	  outvalue += (INT32) GETJSAMPLE(*inptr++);
+	}
+      }
+      *outptr++ = (JSAMPLE) ((outvalue + numpix2) / numpix);
+    }
+    inrow += v_expand;
+  }
+}
+
+
+/*
+ * Downsample pixel values of a single component.
+ * This version handles the special case of a full-size component,
+ * without smoothing.
+ */
+
+METHODDEF(void)
+fullsize_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
+		     JSAMPARRAY input_data, JSAMPARRAY output_data)
+{
+  /* Copy the data */
+  jcopy_sample_rows(input_data, 0, output_data, 0,
+		    cinfo->max_v_samp_factor, cinfo->image_width);
+  /* Edge-expand */
+  expand_right_edge(output_data, cinfo->max_v_samp_factor,
+		    cinfo->image_width, compptr->width_in_blocks * DCTSIZE);
+}
+
+
+/*
+ * Downsample pixel values of a single component.
+ * This version handles the common case of 2:1 horizontal and 1:1 vertical,
+ * without smoothing.
+ *
+ * A note about the "bias" calculations: when rounding fractional values to
+ * integer, we do not want to always round 0.5 up to the next integer.
+ * If we did that, we'd introduce a noticeable bias towards larger values.
+ * Instead, this code is arranged so that 0.5 will be rounded up or down at
+ * alternate pixel locations (a simple ordered dither pattern).
+ */
+
+METHODDEF(void)
+h2v1_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
+		 JSAMPARRAY input_data, JSAMPARRAY output_data)
+{
+  int outrow;
+  JDIMENSION outcol;
+  JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
+  register JSAMPROW inptr, outptr;
+  register int bias;
+
+  /* Expand input data enough to let all the output samples be generated
+   * by the standard loop.  Special-casing padded output would be more
+   * efficient.
+   */
+  expand_right_edge(input_data, cinfo->max_v_samp_factor,
+		    cinfo->image_width, output_cols * 2);
+
+  for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
+    outptr = output_data[outrow];
+    inptr = input_data[outrow];
+    bias = 0;			/* bias = 0,1,0,1,... for successive samples */
+    for (outcol = 0; outcol < output_cols; outcol++) {
+      *outptr++ = (JSAMPLE) ((GETJSAMPLE(*inptr) + GETJSAMPLE(inptr[1])
+			      + bias) >> 1);
+      bias ^= 1;		/* 0=>1, 1=>0 */
+      inptr += 2;
+    }
+  }
+}
+
+
+/*
+ * Downsample pixel values of a single component.
+ * This version handles the standard case of 2:1 horizontal and 2:1 vertical,
+ * without smoothing.
+ */
+
+METHODDEF(void)
+h2v2_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
+		 JSAMPARRAY input_data, JSAMPARRAY output_data)
+{
+  int inrow, outrow;
+  JDIMENSION outcol;
+  JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
+  register JSAMPROW inptr0, inptr1, outptr;
+  register int bias;
+
+  /* Expand input data enough to let all the output samples be generated
+   * by the standard loop.  Special-casing padded output would be more
+   * efficient.
+   */
+  expand_right_edge(input_data, cinfo->max_v_samp_factor,
+		    cinfo->image_width, output_cols * 2);
+
+  inrow = 0;
+  for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
+    outptr = output_data[outrow];
+    inptr0 = input_data[inrow];
+    inptr1 = input_data[inrow+1];
+    bias = 1;			/* bias = 1,2,1,2,... for successive samples */
+    for (outcol = 0; outcol < output_cols; outcol++) {
+      *outptr++ = (JSAMPLE) ((GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[1]) +
+			      GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[1])
+			      + bias) >> 2);
+      bias ^= 3;		/* 1=>2, 2=>1 */
+      inptr0 += 2; inptr1 += 2;
+    }
+    inrow += 2;
+  }
+}
+
+
+#ifdef INPUT_SMOOTHING_SUPPORTED
+
+/*
+ * Downsample pixel values of a single component.
+ * This version handles the standard case of 2:1 horizontal and 2:1 vertical,
+ * with smoothing.  One row of context is required.
+ */
+
+METHODDEF(void)
+h2v2_smooth_downsample (j_compress_ptr cinfo, jpeg_component_info * compptr,
+			JSAMPARRAY input_data, JSAMPARRAY output_data)
+{
+  int inrow, outrow;
+  JDIMENSION colctr;
+  JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
+  register JSAMPROW inptr0, inptr1, above_ptr, below_ptr, outptr;
+  INT32 membersum, neighsum, memberscale, neighscale;
+
+  /* Expand input data enough to let all the output samples be generated
+   * by the standard loop.  Special-casing padded output would be more
+   * efficient.
+   */
+  expand_right_edge(input_data - 1, cinfo->max_v_samp_factor + 2,
+		    cinfo->image_width, output_cols * 2);
+
+  /* We don't bother to form the individual "smoothed" input pixel values;
+   * we can directly compute the output which is the average of the four
+   * smoothed values.  Each of the four member pixels contributes a fraction
+   * (1-8*SF) to its own smoothed image and a fraction SF to each of the three
+   * other smoothed pixels, therefore a total fraction (1-5*SF)/4 to the final
+   * output.  The four corner-adjacent neighbor pixels contribute a fraction
+   * SF to just one smoothed pixel, or SF/4 to the final output; while the
+   * eight edge-adjacent neighbors contribute SF to each of two smoothed
+   * pixels, or SF/2 overall.  In order to use integer arithmetic, these
+   * factors are scaled by 2^16 = 65536.
+   * Also recall that SF = smoothing_factor / 1024.
+   */
+
+  memberscale = 16384 - cinfo->smoothing_factor * 80; /* scaled (1-5*SF)/4 */
+  neighscale = cinfo->smoothing_factor * 16; /* scaled SF/4 */
+
+  inrow = 0;
+  for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
+    outptr = output_data[outrow];
+    inptr0 = input_data[inrow];
+    inptr1 = input_data[inrow+1];
+    above_ptr = input_data[inrow-1];
+    below_ptr = input_data[inrow+2];
+
+    /* Special case for first column: pretend column -1 is same as column 0 */
+    membersum = GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[1]) +
+		GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[1]);
+    neighsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(above_ptr[1]) +
+	       GETJSAMPLE(*below_ptr) + GETJSAMPLE(below_ptr[1]) +
+	       GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[2]) +
+	       GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[2]);
+    neighsum += neighsum;
+    neighsum += GETJSAMPLE(*above_ptr) + GETJSAMPLE(above_ptr[2]) +
+		GETJSAMPLE(*below_ptr) + GETJSAMPLE(below_ptr[2]);
+    membersum = membersum * memberscale + neighsum * neighscale;
+    *outptr++ = (JSAMPLE) ((membersum + 32768) >> 16);
+    inptr0 += 2; inptr1 += 2; above_ptr += 2; below_ptr += 2;
+
+    for (colctr = output_cols - 2; colctr > 0; colctr--) {
+      /* sum of pixels directly mapped to this output element */
+      membersum = GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[1]) +
+		  GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[1]);
+      /* sum of edge-neighbor pixels */
+      neighsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(above_ptr[1]) +
+		 GETJSAMPLE(*below_ptr) + GETJSAMPLE(below_ptr[1]) +
+		 GETJSAMPLE(inptr0[-1]) + GETJSAMPLE(inptr0[2]) +
+		 GETJSAMPLE(inptr1[-1]) + GETJSAMPLE(inptr1[2]);
+      /* The edge-neighbors count twice as much as corner-neighbors */
+      neighsum += neighsum;
+      /* Add in the corner-neighbors */
+      neighsum += GETJSAMPLE(above_ptr[-1]) + GETJSAMPLE(above_ptr[2]) +
+		  GETJSAMPLE(below_ptr[-1]) + GETJSAMPLE(below_ptr[2]);
+      /* form final output scaled up by 2^16 */
+      membersum = membersum * memberscale + neighsum * neighscale;
+      /* round, descale and output it */
+      *outptr++ = (JSAMPLE) ((membersum + 32768) >> 16);
+      inptr0 += 2; inptr1 += 2; above_ptr += 2; below_ptr += 2;
+    }
+
+    /* Special case for last column */
+    membersum = GETJSAMPLE(*inptr0) + GETJSAMPLE(inptr0[1]) +
+		GETJSAMPLE(*inptr1) + GETJSAMPLE(inptr1[1]);
+    neighsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(above_ptr[1]) +
+	       GETJSAMPLE(*below_ptr) + GETJSAMPLE(below_ptr[1]) +
+	       GETJSAMPLE(inptr0[-1]) + GETJSAMPLE(inptr0[1]) +
+	       GETJSAMPLE(inptr1[-1]) + GETJSAMPLE(inptr1[1]);
+    neighsum += neighsum;
+    neighsum += GETJSAMPLE(above_ptr[-1]) + GETJSAMPLE(above_ptr[1]) +
+		GETJSAMPLE(below_ptr[-1]) + GETJSAMPLE(below_ptr[1]);
+    membersum = membersum * memberscale + neighsum * neighscale;
+    *outptr = (JSAMPLE) ((membersum + 32768) >> 16);
+
+    inrow += 2;
+  }
+}
+
+
+/*
+ * Downsample pixel values of a single component.
+ * This version handles the special case of a full-size component,
+ * with smoothing.  One row of context is required.
+ */
+
+METHODDEF(void)
+fullsize_smooth_downsample (j_compress_ptr cinfo, jpeg_component_info *compptr,
+			    JSAMPARRAY input_data, JSAMPARRAY output_data)
+{
+  int outrow;
+  JDIMENSION colctr;
+  JDIMENSION output_cols = compptr->width_in_blocks * DCTSIZE;
+  register JSAMPROW inptr, above_ptr, below_ptr, outptr;
+  INT32 membersum, neighsum, memberscale, neighscale;
+  int colsum, lastcolsum, nextcolsum;
+
+  /* Expand input data enough to let all the output samples be generated
+   * by the standard loop.  Special-casing padded output would be more
+   * efficient.
+   */
+  expand_right_edge(input_data - 1, cinfo->max_v_samp_factor + 2,
+		    cinfo->image_width, output_cols);
+
+  /* Each of the eight neighbor pixels contributes a fraction SF to the
+   * smoothed pixel, while the main pixel contributes (1-8*SF).  In order
+   * to use integer arithmetic, these factors are multiplied by 2^16 = 65536.
+   * Also recall that SF = smoothing_factor / 1024.
+   */
+
+  memberscale = 65536L - cinfo->smoothing_factor * 512L; /* scaled 1-8*SF */
+  neighscale = cinfo->smoothing_factor * 64; /* scaled SF */
+
+  for (outrow = 0; outrow < compptr->v_samp_factor; outrow++) {
+    outptr = output_data[outrow];
+    inptr = input_data[outrow];
+    above_ptr = input_data[outrow-1];
+    below_ptr = input_data[outrow+1];
+
+    /* Special case for first column */
+    colsum = GETJSAMPLE(*above_ptr++) + GETJSAMPLE(*below_ptr++) +
+	     GETJSAMPLE(*inptr);
+    membersum = GETJSAMPLE(*inptr++);
+    nextcolsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(*below_ptr) +
+		 GETJSAMPLE(*inptr);
+    neighsum = colsum + (colsum - membersum) + nextcolsum;
+    membersum = membersum * memberscale + neighsum * neighscale;
+    *outptr++ = (JSAMPLE) ((membersum + 32768) >> 16);
+    lastcolsum = colsum; colsum = nextcolsum;
+
+    for (colctr = output_cols - 2; colctr > 0; colctr--) {
+      membersum = GETJSAMPLE(*inptr++);
+      above_ptr++; below_ptr++;
+      nextcolsum = GETJSAMPLE(*above_ptr) + GETJSAMPLE(*below_ptr) +
+		   GETJSAMPLE(*inptr);
+      neighsum = lastcolsum + (colsum - membersum) + nextcolsum;
+      membersum = membersum * memberscale + neighsum * neighscale;
+      *outptr++ = (JSAMPLE) ((membersum + 32768) >> 16);
+      lastcolsum = colsum; colsum = nextcolsum;
+    }
+
+    /* Special case for last column */
+    membersum = GETJSAMPLE(*inptr);
+    neighsum = lastcolsum + (colsum - membersum) + colsum;
+    membersum = membersum * memberscale + neighsum * neighscale;
+    *outptr = (JSAMPLE) ((membersum + 32768) >> 16);
+
+  }
+}
+
+#endif /* INPUT_SMOOTHING_SUPPORTED */
+
+
+/*
+ * Module initialization routine for downsampling.
+ * Note that we must select a routine for each component.
+ */
+
+GLOBAL(void)
+jinit_downsampler (j_compress_ptr cinfo)
+{
+  my_downsample_ptr downsample;
+  int ci;
+  jpeg_component_info * compptr;
+  boolean smoothok = TRUE;
+
+  downsample = (my_downsample_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_downsampler));
+  cinfo->downsample = (struct jpeg_downsampler *) downsample;
+  downsample->pub.start_pass = start_pass_downsample;
+  downsample->pub.downsample = sep_downsample;
+  downsample->pub.need_context_rows = FALSE;
+
+  if (cinfo->CCIR601_sampling)
+    ERREXIT(cinfo, JERR_CCIR601_NOTIMPL);
+
+  /* Verify we can handle the sampling factors, and set up method pointers */
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    if (compptr->h_samp_factor == cinfo->max_h_samp_factor &&
+	compptr->v_samp_factor == cinfo->max_v_samp_factor) {
+#ifdef INPUT_SMOOTHING_SUPPORTED
+      if (cinfo->smoothing_factor) {
+	downsample->methods[ci] = fullsize_smooth_downsample;
+	downsample->pub.need_context_rows = TRUE;
+      } else
+#endif
+	downsample->methods[ci] = fullsize_downsample;
+    } else if (compptr->h_samp_factor * 2 == cinfo->max_h_samp_factor &&
+	       compptr->v_samp_factor == cinfo->max_v_samp_factor) {
+      smoothok = FALSE;
+      downsample->methods[ci] = h2v1_downsample;
+    } else if (compptr->h_samp_factor * 2 == cinfo->max_h_samp_factor &&
+	       compptr->v_samp_factor * 2 == cinfo->max_v_samp_factor) {
+#ifdef INPUT_SMOOTHING_SUPPORTED
+      if (cinfo->smoothing_factor) {
+	downsample->methods[ci] = h2v2_smooth_downsample;
+	downsample->pub.need_context_rows = TRUE;
+      } else
+#endif
+	downsample->methods[ci] = h2v2_downsample;
+    } else if ((cinfo->max_h_samp_factor % compptr->h_samp_factor) == 0 &&
+	       (cinfo->max_v_samp_factor % compptr->v_samp_factor) == 0) {
+      smoothok = FALSE;
+      downsample->methods[ci] = int_downsample;
+    } else
+      ERREXIT(cinfo, JERR_FRACT_SAMPLE_NOTIMPL);
+  }
+
+#ifdef INPUT_SMOOTHING_SUPPORTED
+  if (cinfo->smoothing_factor && !smoothok)
+    TRACEMS(cinfo, 0, JTRC_SMOOTH_NOTIMPL);
+#endif
+}
diff --git a/common/jpeg/jctrans.c b/common/jpeg/jctrans.c
new file mode 100644
index 00000000..0e6d7076
--- /dev/null
+++ b/common/jpeg/jctrans.c
@@ -0,0 +1,388 @@
+/*
+ * jctrans.c
+ *
+ * Copyright (C) 1995-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains library routines for transcoding compression,
+ * that is, writing raw DCT coefficient arrays to an output JPEG file.
+ * The routines in jcapimin.c will also be needed by a transcoder.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Forward declarations */
+LOCAL(void) transencode_master_selection
+	JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
+LOCAL(void) transencode_coef_controller
+	JPP((j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays));
+
+
+/*
+ * Compression initialization for writing raw-coefficient data.
+ * Before calling this, all parameters and a data destination must be set up.
+ * Call jpeg_finish_compress() to actually write the data.
+ *
+ * The number of passed virtual arrays must match cinfo->num_components.
+ * Note that the virtual arrays need not be filled or even realized at
+ * the time write_coefficients is called; indeed, if the virtual arrays
+ * were requested from this compression object's memory manager, they
+ * typically will be realized during this routine and filled afterwards.
+ */
+
+GLOBAL(void)
+jpeg_write_coefficients (j_compress_ptr cinfo, jvirt_barray_ptr * coef_arrays)
+{
+  if (cinfo->global_state != CSTATE_START)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  /* Mark all tables to be written */
+  jpeg_suppress_tables(cinfo, FALSE);
+  /* (Re)initialize error mgr and destination modules */
+  (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
+  (*cinfo->dest->init_destination) (cinfo);
+  /* Perform master selection of active modules */
+  transencode_master_selection(cinfo, coef_arrays);
+  /* Wait for jpeg_finish_compress() call */
+  cinfo->next_scanline = 0;	/* so jpeg_write_marker works */
+  cinfo->global_state = CSTATE_WRCOEFS;
+}
+
+
+/*
+ * Initialize the compression object with default parameters,
+ * then copy from the source object all parameters needed for lossless
+ * transcoding.  Parameters that can be varied without loss (such as
+ * scan script and Huffman optimization) are left in their default states.
+ */
+
+GLOBAL(void)
+jpeg_copy_critical_parameters (j_decompress_ptr srcinfo,
+			       j_compress_ptr dstinfo)
+{
+  JQUANT_TBL ** qtblptr;
+  jpeg_component_info *incomp, *outcomp;
+  JQUANT_TBL *c_quant, *slot_quant;
+  int tblno, ci, coefi;
+
+  /* Safety check to ensure start_compress not called yet. */
+  if (dstinfo->global_state != CSTATE_START)
+    ERREXIT1(dstinfo, JERR_BAD_STATE, dstinfo->global_state);
+  /* Copy fundamental image dimensions */
+  dstinfo->image_width = srcinfo->image_width;
+  dstinfo->image_height = srcinfo->image_height;
+  dstinfo->input_components = srcinfo->num_components;
+  dstinfo->in_color_space = srcinfo->jpeg_color_space;
+  /* Initialize all parameters to default values */
+  jpeg_set_defaults(dstinfo);
+  /* jpeg_set_defaults may choose wrong colorspace, eg YCbCr if input is RGB.
+   * Fix it to get the right header markers for the image colorspace.
+   */
+  jpeg_set_colorspace(dstinfo, srcinfo->jpeg_color_space);
+  dstinfo->data_precision = srcinfo->data_precision;
+  dstinfo->CCIR601_sampling = srcinfo->CCIR601_sampling;
+  /* Copy the source's quantization tables. */
+  for (tblno = 0; tblno < NUM_QUANT_TBLS; tblno++) {
+    if (srcinfo->quant_tbl_ptrs[tblno] != NULL) {
+      qtblptr = & dstinfo->quant_tbl_ptrs[tblno];
+      if (*qtblptr == NULL)
+	*qtblptr = jpeg_alloc_quant_table((j_common_ptr) dstinfo);
+      MEMCOPY((*qtblptr)->quantval,
+	      srcinfo->quant_tbl_ptrs[tblno]->quantval,
+	      SIZEOF((*qtblptr)->quantval));
+      (*qtblptr)->sent_table = FALSE;
+    }
+  }
+  /* Copy the source's per-component info.
+   * Note we assume jpeg_set_defaults has allocated the dest comp_info array.
+   */
+  dstinfo->num_components = srcinfo->num_components;
+  if (dstinfo->num_components < 1 || dstinfo->num_components > MAX_COMPONENTS)
+    ERREXIT2(dstinfo, JERR_COMPONENT_COUNT, dstinfo->num_components,
+	     MAX_COMPONENTS);
+  for (ci = 0, incomp = srcinfo->comp_info, outcomp = dstinfo->comp_info;
+       ci < dstinfo->num_components; ci++, incomp++, outcomp++) {
+    outcomp->component_id = incomp->component_id;
+    outcomp->h_samp_factor = incomp->h_samp_factor;
+    outcomp->v_samp_factor = incomp->v_samp_factor;
+    outcomp->quant_tbl_no = incomp->quant_tbl_no;
+    /* Make sure saved quantization table for component matches the qtable
+     * slot.  If not, the input file re-used this qtable slot.
+     * IJG encoder currently cannot duplicate this.
+     */
+    tblno = outcomp->quant_tbl_no;
+    if (tblno < 0 || tblno >= NUM_QUANT_TBLS ||
+	srcinfo->quant_tbl_ptrs[tblno] == NULL)
+      ERREXIT1(dstinfo, JERR_NO_QUANT_TABLE, tblno);
+    slot_quant = srcinfo->quant_tbl_ptrs[tblno];
+    c_quant = incomp->quant_table;
+    if (c_quant != NULL) {
+      for (coefi = 0; coefi < DCTSIZE2; coefi++) {
+	if (c_quant->quantval[coefi] != slot_quant->quantval[coefi])
+	  ERREXIT1(dstinfo, JERR_MISMATCHED_QUANT_TABLE, tblno);
+      }
+    }
+    /* Note: we do not copy the source's Huffman table assignments;
+     * instead we rely on jpeg_set_colorspace to have made a suitable choice.
+     */
+  }
+  /* Also copy JFIF version and resolution information, if available.
+   * Strictly speaking this isn't "critical" info, but it's nearly
+   * always appropriate to copy it if available.  In particular,
+   * if the application chooses to copy JFIF 1.02 extension markers from
+   * the source file, we need to copy the version to make sure we don't
+   * emit a file that has 1.02 extensions but a claimed version of 1.01.
+   * We will *not*, however, copy version info from mislabeled "2.01" files.
+   */
+  if (srcinfo->saw_JFIF_marker) {
+    if (srcinfo->JFIF_major_version == 1) {
+      dstinfo->JFIF_major_version = srcinfo->JFIF_major_version;
+      dstinfo->JFIF_minor_version = srcinfo->JFIF_minor_version;
+    }
+    dstinfo->density_unit = srcinfo->density_unit;
+    dstinfo->X_density = srcinfo->X_density;
+    dstinfo->Y_density = srcinfo->Y_density;
+  }
+}
+
+
+/*
+ * Master selection of compression modules for transcoding.
+ * This substitutes for jcinit.c's initialization of the full compressor.
+ */
+
+LOCAL(void)
+transencode_master_selection (j_compress_ptr cinfo,
+			      jvirt_barray_ptr * coef_arrays)
+{
+  /* Although we don't actually use input_components for transcoding,
+   * jcmaster.c's initial_setup will complain if input_components is 0.
+   */
+  cinfo->input_components = 1;
+  /* Initialize master control (includes parameter checking/processing) */
+  jinit_c_master_control(cinfo, TRUE /* transcode only */);
+
+  /* Entropy encoding: either Huffman or arithmetic coding. */
+  if (cinfo->arith_code) {
+    ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
+  } else {
+    if (cinfo->progressive_mode) {
+#ifdef C_PROGRESSIVE_SUPPORTED
+      jinit_phuff_encoder(cinfo);
+#else
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+    } else
+      jinit_huff_encoder(cinfo);
+  }
+
+  /* We need a special coefficient buffer controller. */
+  transencode_coef_controller(cinfo, coef_arrays);
+
+  jinit_marker_writer(cinfo);
+
+  /* We can now tell the memory manager to allocate virtual arrays. */
+  (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
+
+  /* Write the datastream header (SOI, JFIF) immediately.
+   * Frame and scan headers are postponed till later.
+   * This lets application insert special markers after the SOI.
+   */
+  (*cinfo->marker->write_file_header) (cinfo);
+}
+
+
+/*
+ * The rest of this file is a special implementation of the coefficient
+ * buffer controller.  This is similar to jccoefct.c, but it handles only
+ * output from presupplied virtual arrays.  Furthermore, we generate any
+ * dummy padding blocks on-the-fly rather than expecting them to be present
+ * in the arrays.
+ */
+
+/* Private buffer controller object */
+
+typedef struct {
+  struct jpeg_c_coef_controller pub; /* public fields */
+
+  JDIMENSION iMCU_row_num;	/* iMCU row # within image */
+  JDIMENSION mcu_ctr;		/* counts MCUs processed in current row */
+  int MCU_vert_offset;		/* counts MCU rows within iMCU row */
+  int MCU_rows_per_iMCU_row;	/* number of such rows needed */
+
+  /* Virtual block array for each component. */
+  jvirt_barray_ptr * whole_image;
+
+  /* Workspace for constructing dummy blocks at right/bottom edges. */
+  JBLOCKROW dummy_buffer[C_MAX_BLOCKS_IN_MCU];
+} my_coef_controller;
+
+typedef my_coef_controller * my_coef_ptr;
+
+
+LOCAL(void)
+start_iMCU_row (j_compress_ptr cinfo)
+/* Reset within-iMCU-row counters for a new row */
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+
+  /* In an interleaved scan, an MCU row is the same as an iMCU row.
+   * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
+   * But at the bottom of the image, process only what's left.
+   */
+  if (cinfo->comps_in_scan > 1) {
+    coef->MCU_rows_per_iMCU_row = 1;
+  } else {
+    if (coef->iMCU_row_num < (cinfo->total_iMCU_rows-1))
+      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
+    else
+      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
+  }
+
+  coef->mcu_ctr = 0;
+  coef->MCU_vert_offset = 0;
+}
+
+
+/*
+ * Initialize for a processing pass.
+ */
+
+METHODDEF(void)
+start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+
+  if (pass_mode != JBUF_CRANK_DEST)
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+
+  coef->iMCU_row_num = 0;
+  start_iMCU_row(cinfo);
+}
+
+
+/*
+ * Process some data.
+ * We process the equivalent of one fully interleaved MCU row ("iMCU" row)
+ * per call, ie, v_samp_factor block rows for each component in the scan.
+ * The data is obtained from the virtual arrays and fed to the entropy coder.
+ * Returns TRUE if the iMCU row is completed, FALSE if suspended.
+ *
+ * NB: input_buf is ignored; it is likely to be a NULL pointer.
+ */
+
+METHODDEF(boolean)
+compress_output (j_compress_ptr cinfo, JSAMPIMAGE input_buf)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  JDIMENSION MCU_col_num;	/* index of current MCU within row */
+  JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1;
+  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
+  int blkn, ci, xindex, yindex, yoffset, blockcnt;
+  JDIMENSION start_col;
+  JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN];
+  JBLOCKROW MCU_buffer[C_MAX_BLOCKS_IN_MCU];
+  JBLOCKROW buffer_ptr;
+  jpeg_component_info *compptr;
+
+  /* Align the virtual buffers for the components used in this scan. */
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    buffer[ci] = (*cinfo->mem->access_virt_barray)
+      ((j_common_ptr) cinfo, coef->whole_image[compptr->component_index],
+       coef->iMCU_row_num * compptr->v_samp_factor,
+       (JDIMENSION) compptr->v_samp_factor, FALSE);
+  }
+
+  /* Loop to process one whole iMCU row */
+  for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
+       yoffset++) {
+    for (MCU_col_num = coef->mcu_ctr; MCU_col_num < cinfo->MCUs_per_row;
+	 MCU_col_num++) {
+      /* Construct list of pointers to DCT blocks belonging to this MCU */
+      blkn = 0;			/* index of current DCT block within MCU */
+      for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+	compptr = cinfo->cur_comp_info[ci];
+	start_col = MCU_col_num * compptr->MCU_width;
+	blockcnt = (MCU_col_num < last_MCU_col) ? compptr->MCU_width
+						: compptr->last_col_width;
+	for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
+	  if (coef->iMCU_row_num < last_iMCU_row ||
+	      yindex+yoffset < compptr->last_row_height) {
+	    /* Fill in pointers to real blocks in this row */
+	    buffer_ptr = buffer[ci][yindex+yoffset] + start_col;
+	    for (xindex = 0; xindex < blockcnt; xindex++)
+	      MCU_buffer[blkn++] = buffer_ptr++;
+	  } else {
+	    /* At bottom of image, need a whole row of dummy blocks */
+	    xindex = 0;
+	  }
+	  /* Fill in any dummy blocks needed in this row.
+	   * Dummy blocks are filled in the same way as in jccoefct.c:
+	   * all zeroes in the AC entries, DC entries equal to previous
+	   * block's DC value.  The init routine has already zeroed the
+	   * AC entries, so we need only set the DC entries correctly.
+	   */
+	  for (; xindex < compptr->MCU_width; xindex++) {
+	    MCU_buffer[blkn] = coef->dummy_buffer[blkn];
+	    MCU_buffer[blkn][0][0] = MCU_buffer[blkn-1][0][0];
+	    blkn++;
+	  }
+	}
+      }
+      /* Try to write the MCU. */
+      if (! (*cinfo->entropy->encode_mcu) (cinfo, MCU_buffer)) {
+	/* Suspension forced; update state counters and exit */
+	coef->MCU_vert_offset = yoffset;
+	coef->mcu_ctr = MCU_col_num;
+	return FALSE;
+      }
+    }
+    /* Completed an MCU row, but perhaps not an iMCU row */
+    coef->mcu_ctr = 0;
+  }
+  /* Completed the iMCU row, advance counters for next one */
+  coef->iMCU_row_num++;
+  start_iMCU_row(cinfo);
+  return TRUE;
+}
+
+
+/*
+ * Initialize coefficient buffer controller.
+ *
+ * Each passed coefficient array must be the right size for that
+ * coefficient: width_in_blocks wide and height_in_blocks high,
+ * with unitheight at least v_samp_factor.
+ */
+
+LOCAL(void)
+transencode_coef_controller (j_compress_ptr cinfo,
+			     jvirt_barray_ptr * coef_arrays)
+{
+  my_coef_ptr coef;
+  JBLOCKROW buffer;
+  int i;
+
+  coef = (my_coef_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_coef_controller));
+  cinfo->coef = (struct jpeg_c_coef_controller *) coef;
+  coef->pub.start_pass = start_pass_coef;
+  coef->pub.compress_data = compress_output;
+
+  /* Save pointer to virtual arrays */
+  coef->whole_image = coef_arrays;
+
+  /* Allocate and pre-zero space for dummy DCT blocks. */
+  buffer = (JBLOCKROW)
+    (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
+  jzero_far((void FAR *) buffer, C_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
+  for (i = 0; i < C_MAX_BLOCKS_IN_MCU; i++) {
+    coef->dummy_buffer[i] = buffer + i;
+  }
+}
diff --git a/common/jpeg/jdapimin.c b/common/jpeg/jdapimin.c
new file mode 100644
index 00000000..cadb59fc
--- /dev/null
+++ b/common/jpeg/jdapimin.c
@@ -0,0 +1,395 @@
+/*
+ * jdapimin.c
+ *
+ * Copyright (C) 1994-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains application interface code for the decompression half
+ * of the JPEG library.  These are the "minimum" API routines that may be
+ * needed in either the normal full-decompression case or the
+ * transcoding-only case.
+ *
+ * Most of the routines intended to be called directly by an application
+ * are in this file or in jdapistd.c.  But also see jcomapi.c for routines
+ * shared by compression and decompression, and jdtrans.c for the transcoding
+ * case.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * Initialization of a JPEG decompression object.
+ * The error manager must already be set up (in case memory manager fails).
+ */
+
+GLOBAL(void)
+jpeg_CreateDecompress (j_decompress_ptr cinfo, int version, size_t structsize)
+{
+  int i;
+
+  /* Guard against version mismatches between library and caller. */
+  cinfo->mem = NULL;		/* so jpeg_destroy knows mem mgr not called */
+  if (version != JPEG_LIB_VERSION)
+    ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
+  if (structsize != SIZEOF(struct jpeg_decompress_struct))
+    ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE, 
+	     (int) SIZEOF(struct jpeg_decompress_struct), (int) structsize);
+
+  /* For debugging purposes, we zero the whole master structure.
+   * But the application has already set the err pointer, and may have set
+   * client_data, so we have to save and restore those fields.
+   * Note: if application hasn't set client_data, tools like Purify may
+   * complain here.
+   */
+  {
+    struct jpeg_error_mgr * err = cinfo->err;
+    void * client_data = cinfo->client_data; /* ignore Purify complaint here */
+    MEMZERO(cinfo, SIZEOF(struct jpeg_decompress_struct));
+    cinfo->err = err;
+    cinfo->client_data = client_data;
+  }
+  cinfo->is_decompressor = TRUE;
+
+  /* Initialize a memory manager instance for this object */
+  jinit_memory_mgr((j_common_ptr) cinfo);
+
+  /* Zero out pointers to permanent structures. */
+  cinfo->progress = NULL;
+  cinfo->src = NULL;
+
+  for (i = 0; i < NUM_QUANT_TBLS; i++)
+    cinfo->quant_tbl_ptrs[i] = NULL;
+
+  for (i = 0; i < NUM_HUFF_TBLS; i++) {
+    cinfo->dc_huff_tbl_ptrs[i] = NULL;
+    cinfo->ac_huff_tbl_ptrs[i] = NULL;
+  }
+
+  /* Initialize marker processor so application can override methods
+   * for COM, APPn markers before calling jpeg_read_header.
+   */
+  cinfo->marker_list = NULL;
+  jinit_marker_reader(cinfo);
+
+  /* And initialize the overall input controller. */
+  jinit_input_controller(cinfo);
+
+  /* OK, I'm ready */
+  cinfo->global_state = DSTATE_START;
+}
+
+
+/*
+ * Destruction of a JPEG decompression object
+ */
+
+GLOBAL(void)
+jpeg_destroy_decompress (j_decompress_ptr cinfo)
+{
+  jpeg_destroy((j_common_ptr) cinfo); /* use common routine */
+}
+
+
+/*
+ * Abort processing of a JPEG decompression operation,
+ * but don't destroy the object itself.
+ */
+
+GLOBAL(void)
+jpeg_abort_decompress (j_decompress_ptr cinfo)
+{
+  jpeg_abort((j_common_ptr) cinfo); /* use common routine */
+}
+
+
+/*
+ * Set default decompression parameters.
+ */
+
+LOCAL(void)
+default_decompress_parms (j_decompress_ptr cinfo)
+{
+  /* Guess the input colorspace, and set output colorspace accordingly. */
+  /* (Wish JPEG committee had provided a real way to specify this...) */
+  /* Note application may override our guesses. */
+  switch (cinfo->num_components) {
+  case 1:
+    cinfo->jpeg_color_space = JCS_GRAYSCALE;
+    cinfo->out_color_space = JCS_GRAYSCALE;
+    break;
+    
+  case 3:
+    if (cinfo->saw_JFIF_marker) {
+      cinfo->jpeg_color_space = JCS_YCbCr; /* JFIF implies YCbCr */
+    } else if (cinfo->saw_Adobe_marker) {
+      switch (cinfo->Adobe_transform) {
+      case 0:
+	cinfo->jpeg_color_space = JCS_RGB;
+	break;
+      case 1:
+	cinfo->jpeg_color_space = JCS_YCbCr;
+	break;
+      default:
+	WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform);
+	cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */
+	break;
+      }
+    } else {
+      /* Saw no special markers, try to guess from the component IDs */
+      int cid0 = cinfo->comp_info[0].component_id;
+      int cid1 = cinfo->comp_info[1].component_id;
+      int cid2 = cinfo->comp_info[2].component_id;
+
+      if (cid0 == 1 && cid1 == 2 && cid2 == 3)
+	cinfo->jpeg_color_space = JCS_YCbCr; /* assume JFIF w/out marker */
+      else if (cid0 == 82 && cid1 == 71 && cid2 == 66)
+	cinfo->jpeg_color_space = JCS_RGB; /* ASCII 'R', 'G', 'B' */
+      else {
+	TRACEMS3(cinfo, 1, JTRC_UNKNOWN_IDS, cid0, cid1, cid2);
+	cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */
+      }
+    }
+    /* Always guess RGB is proper output colorspace. */
+    cinfo->out_color_space = JCS_RGB;
+    break;
+    
+  case 4:
+    if (cinfo->saw_Adobe_marker) {
+      switch (cinfo->Adobe_transform) {
+      case 0:
+	cinfo->jpeg_color_space = JCS_CMYK;
+	break;
+      case 2:
+	cinfo->jpeg_color_space = JCS_YCCK;
+	break;
+      default:
+	WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform);
+	cinfo->jpeg_color_space = JCS_YCCK; /* assume it's YCCK */
+	break;
+      }
+    } else {
+      /* No special markers, assume straight CMYK. */
+      cinfo->jpeg_color_space = JCS_CMYK;
+    }
+    cinfo->out_color_space = JCS_CMYK;
+    break;
+    
+  default:
+    cinfo->jpeg_color_space = JCS_UNKNOWN;
+    cinfo->out_color_space = JCS_UNKNOWN;
+    break;
+  }
+
+  /* Set defaults for other decompression parameters. */
+  cinfo->scale_num = 1;		/* 1:1 scaling */
+  cinfo->scale_denom = 1;
+  cinfo->output_gamma = 1.0;
+  cinfo->buffered_image = FALSE;
+  cinfo->raw_data_out = FALSE;
+  cinfo->dct_method = JDCT_DEFAULT;
+  cinfo->do_fancy_upsampling = TRUE;
+  cinfo->do_block_smoothing = TRUE;
+  cinfo->quantize_colors = FALSE;
+  /* We set these in case application only sets quantize_colors. */
+  cinfo->dither_mode = JDITHER_FS;
+#ifdef QUANT_2PASS_SUPPORTED
+  cinfo->two_pass_quantize = TRUE;
+#else
+  cinfo->two_pass_quantize = FALSE;
+#endif
+  cinfo->desired_number_of_colors = 256;
+  cinfo->colormap = NULL;
+  /* Initialize for no mode change in buffered-image mode. */
+  cinfo->enable_1pass_quant = FALSE;
+  cinfo->enable_external_quant = FALSE;
+  cinfo->enable_2pass_quant = FALSE;
+}
+
+
+/*
+ * Decompression startup: read start of JPEG datastream to see what's there.
+ * Need only initialize JPEG object and supply a data source before calling.
+ *
+ * This routine will read as far as the first SOS marker (ie, actual start of
+ * compressed data), and will save all tables and parameters in the JPEG
+ * object.  It will also initialize the decompression parameters to default
+ * values, and finally return JPEG_HEADER_OK.  On return, the application may
+ * adjust the decompression parameters and then call jpeg_start_decompress.
+ * (Or, if the application only wanted to determine the image parameters,
+ * the data need not be decompressed.  In that case, call jpeg_abort or
+ * jpeg_destroy to release any temporary space.)
+ * If an abbreviated (tables only) datastream is presented, the routine will
+ * return JPEG_HEADER_TABLES_ONLY upon reaching EOI.  The application may then
+ * re-use the JPEG object to read the abbreviated image datastream(s).
+ * It is unnecessary (but OK) to call jpeg_abort in this case.
+ * The JPEG_SUSPENDED return code only occurs if the data source module
+ * requests suspension of the decompressor.  In this case the application
+ * should load more source data and then re-call jpeg_read_header to resume
+ * processing.
+ * If a non-suspending data source is used and require_image is TRUE, then the
+ * return code need not be inspected since only JPEG_HEADER_OK is possible.
+ *
+ * This routine is now just a front end to jpeg_consume_input, with some
+ * extra error checking.
+ */
+
+GLOBAL(int)
+jpeg_read_header (j_decompress_ptr cinfo, boolean require_image)
+{
+  int retcode;
+
+  if (cinfo->global_state != DSTATE_START &&
+      cinfo->global_state != DSTATE_INHEADER)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  retcode = jpeg_consume_input(cinfo);
+
+  switch (retcode) {
+  case JPEG_REACHED_SOS:
+    retcode = JPEG_HEADER_OK;
+    break;
+  case JPEG_REACHED_EOI:
+    if (require_image)		/* Complain if application wanted an image */
+      ERREXIT(cinfo, JERR_NO_IMAGE);
+    /* Reset to start state; it would be safer to require the application to
+     * call jpeg_abort, but we can't change it now for compatibility reasons.
+     * A side effect is to free any temporary memory (there shouldn't be any).
+     */
+    jpeg_abort((j_common_ptr) cinfo); /* sets state = DSTATE_START */
+    retcode = JPEG_HEADER_TABLES_ONLY;
+    break;
+  case JPEG_SUSPENDED:
+    /* no work */
+    break;
+  }
+
+  return retcode;
+}
+
+
+/*
+ * Consume data in advance of what the decompressor requires.
+ * This can be called at any time once the decompressor object has
+ * been created and a data source has been set up.
+ *
+ * This routine is essentially a state machine that handles a couple
+ * of critical state-transition actions, namely initial setup and
+ * transition from header scanning to ready-for-start_decompress.
+ * All the actual input is done via the input controller's consume_input
+ * method.
+ */
+
+GLOBAL(int)
+jpeg_consume_input (j_decompress_ptr cinfo)
+{
+  int retcode = JPEG_SUSPENDED;
+
+  /* NB: every possible DSTATE value should be listed in this switch */
+  switch (cinfo->global_state) {
+  case DSTATE_START:
+    /* Start-of-datastream actions: reset appropriate modules */
+    (*cinfo->inputctl->reset_input_controller) (cinfo);
+    /* Initialize application's data source module */
+    (*cinfo->src->init_source) (cinfo);
+    cinfo->global_state = DSTATE_INHEADER;
+    /*FALLTHROUGH*/
+  case DSTATE_INHEADER:
+    retcode = (*cinfo->inputctl->consume_input) (cinfo);
+    if (retcode == JPEG_REACHED_SOS) { /* Found SOS, prepare to decompress */
+      /* Set up default parameters based on header data */
+      default_decompress_parms(cinfo);
+      /* Set global state: ready for start_decompress */
+      cinfo->global_state = DSTATE_READY;
+    }
+    break;
+  case DSTATE_READY:
+    /* Can't advance past first SOS until start_decompress is called */
+    retcode = JPEG_REACHED_SOS;
+    break;
+  case DSTATE_PRELOAD:
+  case DSTATE_PRESCAN:
+  case DSTATE_SCANNING:
+  case DSTATE_RAW_OK:
+  case DSTATE_BUFIMAGE:
+  case DSTATE_BUFPOST:
+  case DSTATE_STOPPING:
+    retcode = (*cinfo->inputctl->consume_input) (cinfo);
+    break;
+  default:
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  }
+  return retcode;
+}
+
+
+/*
+ * Have we finished reading the input file?
+ */
+
+GLOBAL(boolean)
+jpeg_input_complete (j_decompress_ptr cinfo)
+{
+  /* Check for valid jpeg object */
+  if (cinfo->global_state < DSTATE_START ||
+      cinfo->global_state > DSTATE_STOPPING)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  return cinfo->inputctl->eoi_reached;
+}
+
+
+/*
+ * Is there more than one scan?
+ */
+
+GLOBAL(boolean)
+jpeg_has_multiple_scans (j_decompress_ptr cinfo)
+{
+  /* Only valid after jpeg_read_header completes */
+  if (cinfo->global_state < DSTATE_READY ||
+      cinfo->global_state > DSTATE_STOPPING)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  return cinfo->inputctl->has_multiple_scans;
+}
+
+
+/*
+ * Finish JPEG decompression.
+ *
+ * This will normally just verify the file trailer and release temp storage.
+ *
+ * Returns FALSE if suspended.  The return value need be inspected only if
+ * a suspending data source is used.
+ */
+
+GLOBAL(boolean)
+jpeg_finish_decompress (j_decompress_ptr cinfo)
+{
+  if ((cinfo->global_state == DSTATE_SCANNING ||
+       cinfo->global_state == DSTATE_RAW_OK) && ! cinfo->buffered_image) {
+    /* Terminate final pass of non-buffered mode */
+    if (cinfo->output_scanline < cinfo->output_height)
+      ERREXIT(cinfo, JERR_TOO_LITTLE_DATA);
+    (*cinfo->master->finish_output_pass) (cinfo);
+    cinfo->global_state = DSTATE_STOPPING;
+  } else if (cinfo->global_state == DSTATE_BUFIMAGE) {
+    /* Finishing after a buffered-image operation */
+    cinfo->global_state = DSTATE_STOPPING;
+  } else if (cinfo->global_state != DSTATE_STOPPING) {
+    /* STOPPING = repeat call after a suspension, anything else is error */
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  }
+  /* Read until EOI */
+  while (! cinfo->inputctl->eoi_reached) {
+    if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED)
+      return FALSE;		/* Suspend, come back later */
+  }
+  /* Do final cleanup */
+  (*cinfo->src->term_source) (cinfo);
+  /* We can use jpeg_abort to release memory and reset global_state */
+  jpeg_abort((j_common_ptr) cinfo);
+  return TRUE;
+}
diff --git a/common/jpeg/jdapistd.c b/common/jpeg/jdapistd.c
new file mode 100644
index 00000000..c8e3fa0c
--- /dev/null
+++ b/common/jpeg/jdapistd.c
@@ -0,0 +1,275 @@
+/*
+ * jdapistd.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains application interface code for the decompression half
+ * of the JPEG library.  These are the "standard" API routines that are
+ * used in the normal full-decompression case.  They are not used by a
+ * transcoding-only application.  Note that if an application links in
+ * jpeg_start_decompress, it will end up linking in the entire decompressor.
+ * We thus must separate this file from jdapimin.c to avoid linking the
+ * whole decompression library into a transcoder.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Forward declarations */
+LOCAL(boolean) output_pass_setup JPP((j_decompress_ptr cinfo));
+
+
+/*
+ * Decompression initialization.
+ * jpeg_read_header must be completed before calling this.
+ *
+ * If a multipass operating mode was selected, this will do all but the
+ * last pass, and thus may take a great deal of time.
+ *
+ * Returns FALSE if suspended.  The return value need be inspected only if
+ * a suspending data source is used.
+ */
+
+GLOBAL(boolean)
+jpeg_start_decompress (j_decompress_ptr cinfo)
+{
+  if (cinfo->global_state == DSTATE_READY) {
+    /* First call: initialize master control, select active modules */
+    jinit_master_decompress(cinfo);
+    if (cinfo->buffered_image) {
+      /* No more work here; expecting jpeg_start_output next */
+      cinfo->global_state = DSTATE_BUFIMAGE;
+      return TRUE;
+    }
+    cinfo->global_state = DSTATE_PRELOAD;
+  }
+  if (cinfo->global_state == DSTATE_PRELOAD) {
+    /* If file has multiple scans, absorb them all into the coef buffer */
+    if (cinfo->inputctl->has_multiple_scans) {
+#ifdef D_MULTISCAN_FILES_SUPPORTED
+      for (;;) {
+	int retcode;
+	/* Call progress monitor hook if present */
+	if (cinfo->progress != NULL)
+	  (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+	/* Absorb some more input */
+	retcode = (*cinfo->inputctl->consume_input) (cinfo);
+	if (retcode == JPEG_SUSPENDED)
+	  return FALSE;
+	if (retcode == JPEG_REACHED_EOI)
+	  break;
+	/* Advance progress counter if appropriate */
+	if (cinfo->progress != NULL &&
+	    (retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
+	  if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
+	    /* jdmaster underestimated number of scans; ratchet up one scan */
+	    cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
+	  }
+	}
+      }
+#else
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif /* D_MULTISCAN_FILES_SUPPORTED */
+    }
+    cinfo->output_scan_number = cinfo->input_scan_number;
+  } else if (cinfo->global_state != DSTATE_PRESCAN)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  /* Perform any dummy output passes, and set up for the final pass */
+  return output_pass_setup(cinfo);
+}
+
+
+/*
+ * Set up for an output pass, and perform any dummy pass(es) needed.
+ * Common subroutine for jpeg_start_decompress and jpeg_start_output.
+ * Entry: global_state = DSTATE_PRESCAN only if previously suspended.
+ * Exit: If done, returns TRUE and sets global_state for proper output mode.
+ *       If suspended, returns FALSE and sets global_state = DSTATE_PRESCAN.
+ */
+
+LOCAL(boolean)
+output_pass_setup (j_decompress_ptr cinfo)
+{
+  if (cinfo->global_state != DSTATE_PRESCAN) {
+    /* First call: do pass setup */
+    (*cinfo->master->prepare_for_output_pass) (cinfo);
+    cinfo->output_scanline = 0;
+    cinfo->global_state = DSTATE_PRESCAN;
+  }
+  /* Loop over any required dummy passes */
+  while (cinfo->master->is_dummy_pass) {
+#ifdef QUANT_2PASS_SUPPORTED
+    /* Crank through the dummy pass */
+    while (cinfo->output_scanline < cinfo->output_height) {
+      JDIMENSION last_scanline;
+      /* Call progress monitor hook if present */
+      if (cinfo->progress != NULL) {
+	cinfo->progress->pass_counter = (long) cinfo->output_scanline;
+	cinfo->progress->pass_limit = (long) cinfo->output_height;
+	(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+      }
+      /* Process some data */
+      last_scanline = cinfo->output_scanline;
+      (*cinfo->main->process_data) (cinfo, (JSAMPARRAY) NULL,
+				    &cinfo->output_scanline, (JDIMENSION) 0);
+      if (cinfo->output_scanline == last_scanline)
+	return FALSE;		/* No progress made, must suspend */
+    }
+    /* Finish up dummy pass, and set up for another one */
+    (*cinfo->master->finish_output_pass) (cinfo);
+    (*cinfo->master->prepare_for_output_pass) (cinfo);
+    cinfo->output_scanline = 0;
+#else
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif /* QUANT_2PASS_SUPPORTED */
+  }
+  /* Ready for application to drive output pass through
+   * jpeg_read_scanlines or jpeg_read_raw_data.
+   */
+  cinfo->global_state = cinfo->raw_data_out ? DSTATE_RAW_OK : DSTATE_SCANNING;
+  return TRUE;
+}
+
+
+/*
+ * Read some scanlines of data from the JPEG decompressor.
+ *
+ * The return value will be the number of lines actually read.
+ * This may be less than the number requested in several cases,
+ * including bottom of image, data source suspension, and operating
+ * modes that emit multiple scanlines at a time.
+ *
+ * Note: we warn about excess calls to jpeg_read_scanlines() since
+ * this likely signals an application programmer error.  However,
+ * an oversize buffer (max_lines > scanlines remaining) is not an error.
+ */
+
+GLOBAL(JDIMENSION)
+jpeg_read_scanlines (j_decompress_ptr cinfo, JSAMPARRAY scanlines,
+		     JDIMENSION max_lines)
+{
+  JDIMENSION row_ctr;
+
+  if (cinfo->global_state != DSTATE_SCANNING)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  if (cinfo->output_scanline >= cinfo->output_height) {
+    WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
+    return 0;
+  }
+
+  /* Call progress monitor hook if present */
+  if (cinfo->progress != NULL) {
+    cinfo->progress->pass_counter = (long) cinfo->output_scanline;
+    cinfo->progress->pass_limit = (long) cinfo->output_height;
+    (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+  }
+
+  /* Process some data */
+  row_ctr = 0;
+  (*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, max_lines);
+  cinfo->output_scanline += row_ctr;
+  return row_ctr;
+}
+
+
+/*
+ * Alternate entry point to read raw data.
+ * Processes exactly one iMCU row per call, unless suspended.
+ */
+
+GLOBAL(JDIMENSION)
+jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data,
+		    JDIMENSION max_lines)
+{
+  JDIMENSION lines_per_iMCU_row;
+
+  if (cinfo->global_state != DSTATE_RAW_OK)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  if (cinfo->output_scanline >= cinfo->output_height) {
+    WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
+    return 0;
+  }
+
+  /* Call progress monitor hook if present */
+  if (cinfo->progress != NULL) {
+    cinfo->progress->pass_counter = (long) cinfo->output_scanline;
+    cinfo->progress->pass_limit = (long) cinfo->output_height;
+    (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+  }
+
+  /* Verify that at least one iMCU row can be returned. */
+  lines_per_iMCU_row = cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size;
+  if (max_lines < lines_per_iMCU_row)
+    ERREXIT(cinfo, JERR_BUFFER_SIZE);
+
+  /* Decompress directly into user's buffer. */
+  if (! (*cinfo->coef->decompress_data) (cinfo, data))
+    return 0;			/* suspension forced, can do nothing more */
+
+  /* OK, we processed one iMCU row. */
+  cinfo->output_scanline += lines_per_iMCU_row;
+  return lines_per_iMCU_row;
+}
+
+
+/* Additional entry points for buffered-image mode. */
+
+#ifdef D_MULTISCAN_FILES_SUPPORTED
+
+/*
+ * Initialize for an output pass in buffered-image mode.
+ */
+
+GLOBAL(boolean)
+jpeg_start_output (j_decompress_ptr cinfo, int scan_number)
+{
+  if (cinfo->global_state != DSTATE_BUFIMAGE &&
+      cinfo->global_state != DSTATE_PRESCAN)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  /* Limit scan number to valid range */
+  if (scan_number <= 0)
+    scan_number = 1;
+  if (cinfo->inputctl->eoi_reached &&
+      scan_number > cinfo->input_scan_number)
+    scan_number = cinfo->input_scan_number;
+  cinfo->output_scan_number = scan_number;
+  /* Perform any dummy output passes, and set up for the real pass */
+  return output_pass_setup(cinfo);
+}
+
+
+/*
+ * Finish up after an output pass in buffered-image mode.
+ *
+ * Returns FALSE if suspended.  The return value need be inspected only if
+ * a suspending data source is used.
+ */
+
+GLOBAL(boolean)
+jpeg_finish_output (j_decompress_ptr cinfo)
+{
+  if ((cinfo->global_state == DSTATE_SCANNING ||
+       cinfo->global_state == DSTATE_RAW_OK) && cinfo->buffered_image) {
+    /* Terminate this pass. */
+    /* We do not require the whole pass to have been completed. */
+    (*cinfo->master->finish_output_pass) (cinfo);
+    cinfo->global_state = DSTATE_BUFPOST;
+  } else if (cinfo->global_state != DSTATE_BUFPOST) {
+    /* BUFPOST = repeat call after a suspension, anything else is error */
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  }
+  /* Read markers looking for SOS or EOI */
+  while (cinfo->input_scan_number <= cinfo->output_scan_number &&
+	 ! cinfo->inputctl->eoi_reached) {
+    if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED)
+      return FALSE;		/* Suspend, come back later */
+  }
+  cinfo->global_state = DSTATE_BUFIMAGE;
+  return TRUE;
+}
+
+#endif /* D_MULTISCAN_FILES_SUPPORTED */
diff --git a/common/jpeg/jdatadst.c b/common/jpeg/jdatadst.c
new file mode 100644
index 00000000..a8f6fb0e
--- /dev/null
+++ b/common/jpeg/jdatadst.c
@@ -0,0 +1,151 @@
+/*
+ * jdatadst.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains compression data destination routines for the case of
+ * emitting JPEG data to a file (or any stdio stream).  While these routines
+ * are sufficient for most applications, some will want to use a different
+ * destination manager.
+ * IMPORTANT: we assume that fwrite() will correctly transcribe an array of
+ * JOCTETs into 8-bit-wide elements on external storage.  If char is wider
+ * than 8 bits on your machine, you may need to do some tweaking.
+ */
+
+/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jerror.h"
+
+
+/* Expanded data destination object for stdio output */
+
+typedef struct {
+  struct jpeg_destination_mgr pub; /* public fields */
+
+  FILE * outfile;		/* target stream */
+  JOCTET * buffer;		/* start of buffer */
+} my_destination_mgr;
+
+typedef my_destination_mgr * my_dest_ptr;
+
+#define OUTPUT_BUF_SIZE  4096	/* choose an efficiently fwrite'able size */
+
+
+/*
+ * Initialize destination --- called by jpeg_start_compress
+ * before any data is actually written.
+ */
+
+METHODDEF(void)
+init_destination (j_compress_ptr cinfo)
+{
+  my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
+
+  /* Allocate the output buffer --- it will be released when done with image */
+  dest->buffer = (JOCTET *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  OUTPUT_BUF_SIZE * SIZEOF(JOCTET));
+
+  dest->pub.next_output_byte = dest->buffer;
+  dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
+}
+
+
+/*
+ * Empty the output buffer --- called whenever buffer fills up.
+ *
+ * In typical applications, this should write the entire output buffer
+ * (ignoring the current state of next_output_byte & free_in_buffer),
+ * reset the pointer & count to the start of the buffer, and return TRUE
+ * indicating that the buffer has been dumped.
+ *
+ * In applications that need to be able to suspend compression due to output
+ * overrun, a FALSE return indicates that the buffer cannot be emptied now.
+ * In this situation, the compressor will return to its caller (possibly with
+ * an indication that it has not accepted all the supplied scanlines).  The
+ * application should resume compression after it has made more room in the
+ * output buffer.  Note that there are substantial restrictions on the use of
+ * suspension --- see the documentation.
+ *
+ * When suspending, the compressor will back up to a convenient restart point
+ * (typically the start of the current MCU). next_output_byte & free_in_buffer
+ * indicate where the restart point will be if the current call returns FALSE.
+ * Data beyond this point will be regenerated after resumption, so do not
+ * write it out when emptying the buffer externally.
+ */
+
+METHODDEF(boolean)
+empty_output_buffer (j_compress_ptr cinfo)
+{
+  my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
+
+  if (JFWRITE(dest->outfile, dest->buffer, OUTPUT_BUF_SIZE) !=
+      (size_t) OUTPUT_BUF_SIZE)
+    ERREXIT(cinfo, JERR_FILE_WRITE);
+
+  dest->pub.next_output_byte = dest->buffer;
+  dest->pub.free_in_buffer = OUTPUT_BUF_SIZE;
+
+  return TRUE;
+}
+
+
+/*
+ * Terminate destination --- called by jpeg_finish_compress
+ * after all data has been written.  Usually needs to flush buffer.
+ *
+ * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
+ * application must deal with any cleanup that should happen even
+ * for error exit.
+ */
+
+METHODDEF(void)
+term_destination (j_compress_ptr cinfo)
+{
+  my_dest_ptr dest = (my_dest_ptr) cinfo->dest;
+  size_t datacount = OUTPUT_BUF_SIZE - dest->pub.free_in_buffer;
+
+  /* Write any data remaining in the buffer */
+  if (datacount > 0) {
+    if (JFWRITE(dest->outfile, dest->buffer, datacount) != datacount)
+      ERREXIT(cinfo, JERR_FILE_WRITE);
+  }
+  fflush(dest->outfile);
+  /* Make sure we wrote the output file OK */
+  if (ferror(dest->outfile))
+    ERREXIT(cinfo, JERR_FILE_WRITE);
+}
+
+
+/*
+ * Prepare for output to a stdio stream.
+ * The caller must have already opened the stream, and is responsible
+ * for closing it after finishing compression.
+ */
+
+GLOBAL(void)
+jpeg_stdio_dest (j_compress_ptr cinfo, FILE * outfile)
+{
+  my_dest_ptr dest;
+
+  /* The destination object is made permanent so that multiple JPEG images
+   * can be written to the same file without re-executing jpeg_stdio_dest.
+   * This makes it dangerous to use this manager and a different destination
+   * manager serially with the same JPEG object, because their private object
+   * sizes may be different.  Caveat programmer.
+   */
+  if (cinfo->dest == NULL) {	/* first time for this JPEG object? */
+    cinfo->dest = (struct jpeg_destination_mgr *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+				  SIZEOF(my_destination_mgr));
+  }
+
+  dest = (my_dest_ptr) cinfo->dest;
+  dest->pub.init_destination = init_destination;
+  dest->pub.empty_output_buffer = empty_output_buffer;
+  dest->pub.term_destination = term_destination;
+  dest->outfile = outfile;
+}
diff --git a/common/jpeg/jdatasrc.c b/common/jpeg/jdatasrc.c
new file mode 100644
index 00000000..edc752bf
--- /dev/null
+++ b/common/jpeg/jdatasrc.c
@@ -0,0 +1,212 @@
+/*
+ * jdatasrc.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains decompression data source routines for the case of
+ * reading JPEG data from a file (or any stdio stream).  While these routines
+ * are sufficient for most applications, some will want to use a different
+ * source manager.
+ * IMPORTANT: we assume that fread() will correctly transcribe an array of
+ * JOCTETs from 8-bit-wide elements on external storage.  If char is wider
+ * than 8 bits on your machine, you may need to do some tweaking.
+ */
+
+/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jerror.h"
+
+
+/* Expanded data source object for stdio input */
+
+typedef struct {
+  struct jpeg_source_mgr pub;	/* public fields */
+
+  FILE * infile;		/* source stream */
+  JOCTET * buffer;		/* start of buffer */
+  boolean start_of_file;	/* have we gotten any data yet? */
+} my_source_mgr;
+
+typedef my_source_mgr * my_src_ptr;
+
+#define INPUT_BUF_SIZE  4096	/* choose an efficiently fread'able size */
+
+
+/*
+ * Initialize source --- called by jpeg_read_header
+ * before any data is actually read.
+ */
+
+METHODDEF(void)
+init_source (j_decompress_ptr cinfo)
+{
+  my_src_ptr src = (my_src_ptr) cinfo->src;
+
+  /* We reset the empty-input-file flag for each image,
+   * but we don't clear the input buffer.
+   * This is correct behavior for reading a series of images from one source.
+   */
+  src->start_of_file = TRUE;
+}
+
+
+/*
+ * Fill the input buffer --- called whenever buffer is emptied.
+ *
+ * In typical applications, this should read fresh data into the buffer
+ * (ignoring the current state of next_input_byte & bytes_in_buffer),
+ * reset the pointer & count to the start of the buffer, and return TRUE
+ * indicating that the buffer has been reloaded.  It is not necessary to
+ * fill the buffer entirely, only to obtain at least one more byte.
+ *
+ * There is no such thing as an EOF return.  If the end of the file has been
+ * reached, the routine has a choice of ERREXIT() or inserting fake data into
+ * the buffer.  In most cases, generating a warning message and inserting a
+ * fake EOI marker is the best course of action --- this will allow the
+ * decompressor to output however much of the image is there.  However,
+ * the resulting error message is misleading if the real problem is an empty
+ * input file, so we handle that case specially.
+ *
+ * In applications that need to be able to suspend compression due to input
+ * not being available yet, a FALSE return indicates that no more data can be
+ * obtained right now, but more may be forthcoming later.  In this situation,
+ * the decompressor will return to its caller (with an indication of the
+ * number of scanlines it has read, if any).  The application should resume
+ * decompression after it has loaded more data into the input buffer.  Note
+ * that there are substantial restrictions on the use of suspension --- see
+ * the documentation.
+ *
+ * When suspending, the decompressor will back up to a convenient restart point
+ * (typically the start of the current MCU). next_input_byte & bytes_in_buffer
+ * indicate where the restart point will be if the current call returns FALSE.
+ * Data beyond this point must be rescanned after resumption, so move it to
+ * the front of the buffer rather than discarding it.
+ */
+
+METHODDEF(boolean)
+fill_input_buffer (j_decompress_ptr cinfo)
+{
+  my_src_ptr src = (my_src_ptr) cinfo->src;
+  size_t nbytes;
+
+  nbytes = JFREAD(src->infile, src->buffer, INPUT_BUF_SIZE);
+
+  if (nbytes <= 0) {
+    if (src->start_of_file)	/* Treat empty input file as fatal error */
+      ERREXIT(cinfo, JERR_INPUT_EMPTY);
+    WARNMS(cinfo, JWRN_JPEG_EOF);
+    /* Insert a fake EOI marker */
+    src->buffer[0] = (JOCTET) 0xFF;
+    src->buffer[1] = (JOCTET) JPEG_EOI;
+    nbytes = 2;
+  }
+
+  src->pub.next_input_byte = src->buffer;
+  src->pub.bytes_in_buffer = nbytes;
+  src->start_of_file = FALSE;
+
+  return TRUE;
+}
+
+
+/*
+ * Skip data --- used to skip over a potentially large amount of
+ * uninteresting data (such as an APPn marker).
+ *
+ * Writers of suspendable-input applications must note that skip_input_data
+ * is not granted the right to give a suspension return.  If the skip extends
+ * beyond the data currently in the buffer, the buffer can be marked empty so
+ * that the next read will cause a fill_input_buffer call that can suspend.
+ * Arranging for additional bytes to be discarded before reloading the input
+ * buffer is the application writer's problem.
+ */
+
+METHODDEF(void)
+skip_input_data (j_decompress_ptr cinfo, long num_bytes)
+{
+  my_src_ptr src = (my_src_ptr) cinfo->src;
+
+  /* Just a dumb implementation for now.  Could use fseek() except
+   * it doesn't work on pipes.  Not clear that being smart is worth
+   * any trouble anyway --- large skips are infrequent.
+   */
+  if (num_bytes > 0) {
+    while (num_bytes > (long) src->pub.bytes_in_buffer) {
+      num_bytes -= (long) src->pub.bytes_in_buffer;
+      (void) fill_input_buffer(cinfo);
+      /* note we assume that fill_input_buffer will never return FALSE,
+       * so suspension need not be handled.
+       */
+    }
+    src->pub.next_input_byte += (size_t) num_bytes;
+    src->pub.bytes_in_buffer -= (size_t) num_bytes;
+  }
+}
+
+
+/*
+ * An additional method that can be provided by data source modules is the
+ * resync_to_restart method for error recovery in the presence of RST markers.
+ * For the moment, this source module just uses the default resync method
+ * provided by the JPEG library.  That method assumes that no backtracking
+ * is possible.
+ */
+
+
+/*
+ * Terminate source --- called by jpeg_finish_decompress
+ * after all data has been read.  Often a no-op.
+ *
+ * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
+ * application must deal with any cleanup that should happen even
+ * for error exit.
+ */
+
+METHODDEF(void)
+term_source (j_decompress_ptr cinfo)
+{
+  /* no work necessary here */
+}
+
+
+/*
+ * Prepare for input from a stdio stream.
+ * The caller must have already opened the stream, and is responsible
+ * for closing it after finishing decompression.
+ */
+
+GLOBAL(void)
+jpeg_stdio_src (j_decompress_ptr cinfo, FILE * infile)
+{
+  my_src_ptr src;
+
+  /* The source object and input buffer are made permanent so that a series
+   * of JPEG images can be read from the same file by calling jpeg_stdio_src
+   * only before the first one.  (If we discarded the buffer at the end of
+   * one image, we'd likely lose the start of the next one.)
+   * This makes it unsafe to use this manager and a different source
+   * manager serially with the same JPEG object.  Caveat programmer.
+   */
+  if (cinfo->src == NULL) {	/* first time for this JPEG object? */
+    cinfo->src = (struct jpeg_source_mgr *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+				  SIZEOF(my_source_mgr));
+    src = (my_src_ptr) cinfo->src;
+    src->buffer = (JOCTET *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+				  INPUT_BUF_SIZE * SIZEOF(JOCTET));
+  }
+
+  src = (my_src_ptr) cinfo->src;
+  src->pub.init_source = init_source;
+  src->pub.fill_input_buffer = fill_input_buffer;
+  src->pub.skip_input_data = skip_input_data;
+  src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
+  src->pub.term_source = term_source;
+  src->infile = infile;
+  src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
+  src->pub.next_input_byte = NULL; /* until buffer loaded */
+}
diff --git a/common/jpeg/jdcoefct.c b/common/jpeg/jdcoefct.c
new file mode 100644
index 00000000..4938d20f
--- /dev/null
+++ b/common/jpeg/jdcoefct.c
@@ -0,0 +1,736 @@
+/*
+ * jdcoefct.c
+ *
+ * Copyright (C) 1994-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the coefficient buffer controller for decompression.
+ * This controller is the top level of the JPEG decompressor proper.
+ * The coefficient buffer lies between entropy decoding and inverse-DCT steps.
+ *
+ * In buffered-image mode, this controller is the interface between
+ * input-oriented processing and output-oriented processing.
+ * Also, the input side (only) is used when reading a file for transcoding.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+/* Block smoothing is only applicable for progressive JPEG, so: */
+#ifndef D_PROGRESSIVE_SUPPORTED
+#undef BLOCK_SMOOTHING_SUPPORTED
+#endif
+
+/* Private buffer controller object */
+
+typedef struct {
+  struct jpeg_d_coef_controller pub; /* public fields */
+
+  /* These variables keep track of the current location of the input side. */
+  /* cinfo->input_iMCU_row is also used for this. */
+  JDIMENSION MCU_ctr;		/* counts MCUs processed in current row */
+  int MCU_vert_offset;		/* counts MCU rows within iMCU row */
+  int MCU_rows_per_iMCU_row;	/* number of such rows needed */
+
+  /* The output side's location is represented by cinfo->output_iMCU_row. */
+
+  /* In single-pass modes, it's sufficient to buffer just one MCU.
+   * We allocate a workspace of D_MAX_BLOCKS_IN_MCU coefficient blocks,
+   * and let the entropy decoder write into that workspace each time.
+   * (On 80x86, the workspace is FAR even though it's not really very big;
+   * this is to keep the module interfaces unchanged when a large coefficient
+   * buffer is necessary.)
+   * In multi-pass modes, this array points to the current MCU's blocks
+   * within the virtual arrays; it is used only by the input side.
+   */
+  JBLOCKROW MCU_buffer[D_MAX_BLOCKS_IN_MCU];
+
+#ifdef D_MULTISCAN_FILES_SUPPORTED
+  /* In multi-pass modes, we need a virtual block array for each component. */
+  jvirt_barray_ptr whole_image[MAX_COMPONENTS];
+#endif
+
+#ifdef BLOCK_SMOOTHING_SUPPORTED
+  /* When doing block smoothing, we latch coefficient Al values here */
+  int * coef_bits_latch;
+#define SAVED_COEFS  6		/* we save coef_bits[0..5] */
+#endif
+} my_coef_controller;
+
+typedef my_coef_controller * my_coef_ptr;
+
+/* Forward declarations */
+METHODDEF(int) decompress_onepass
+	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
+#ifdef D_MULTISCAN_FILES_SUPPORTED
+METHODDEF(int) decompress_data
+	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
+#endif
+#ifdef BLOCK_SMOOTHING_SUPPORTED
+LOCAL(boolean) smoothing_ok JPP((j_decompress_ptr cinfo));
+METHODDEF(int) decompress_smooth_data
+	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
+#endif
+
+
+LOCAL(void)
+start_iMCU_row (j_decompress_ptr cinfo)
+/* Reset within-iMCU-row counters for a new row (input side) */
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+
+  /* In an interleaved scan, an MCU row is the same as an iMCU row.
+   * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
+   * But at the bottom of the image, process only what's left.
+   */
+  if (cinfo->comps_in_scan > 1) {
+    coef->MCU_rows_per_iMCU_row = 1;
+  } else {
+    if (cinfo->input_iMCU_row < (cinfo->total_iMCU_rows-1))
+      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
+    else
+      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
+  }
+
+  coef->MCU_ctr = 0;
+  coef->MCU_vert_offset = 0;
+}
+
+
+/*
+ * Initialize for an input processing pass.
+ */
+
+METHODDEF(void)
+start_input_pass (j_decompress_ptr cinfo)
+{
+  cinfo->input_iMCU_row = 0;
+  start_iMCU_row(cinfo);
+}
+
+
+/*
+ * Initialize for an output processing pass.
+ */
+
+METHODDEF(void)
+start_output_pass (j_decompress_ptr cinfo)
+{
+#ifdef BLOCK_SMOOTHING_SUPPORTED
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+
+  /* If multipass, check to see whether to use block smoothing on this pass */
+  if (coef->pub.coef_arrays != NULL) {
+    if (cinfo->do_block_smoothing && smoothing_ok(cinfo))
+      coef->pub.decompress_data = decompress_smooth_data;
+    else
+      coef->pub.decompress_data = decompress_data;
+  }
+#endif
+  cinfo->output_iMCU_row = 0;
+}
+
+
+/*
+ * Decompress and return some data in the single-pass case.
+ * Always attempts to emit one fully interleaved MCU row ("iMCU" row).
+ * Input and output must run in lockstep since we have only a one-MCU buffer.
+ * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED.
+ *
+ * NB: output_buf contains a plane for each component in image,
+ * which we index according to the component's SOF position.
+ */
+
+METHODDEF(int)
+decompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  JDIMENSION MCU_col_num;	/* index of current MCU within row */
+  JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1;
+  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
+  int blkn, ci, xindex, yindex, yoffset, useful_width;
+  JSAMPARRAY output_ptr;
+  JDIMENSION start_col, output_col;
+  jpeg_component_info *compptr;
+  inverse_DCT_method_ptr inverse_DCT;
+
+  /* Loop to process as much as one whole iMCU row */
+  for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
+       yoffset++) {
+    for (MCU_col_num = coef->MCU_ctr; MCU_col_num <= last_MCU_col;
+	 MCU_col_num++) {
+      /* Try to fetch an MCU.  Entropy decoder expects buffer to be zeroed. */
+      jzero_far((void FAR *) coef->MCU_buffer[0],
+		(size_t) (cinfo->blocks_in_MCU * SIZEOF(JBLOCK)));
+      if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) {
+	/* Suspension forced; update state counters and exit */
+	coef->MCU_vert_offset = yoffset;
+	coef->MCU_ctr = MCU_col_num;
+	return JPEG_SUSPENDED;
+      }
+      /* Determine where data should go in output_buf and do the IDCT thing.
+       * We skip dummy blocks at the right and bottom edges (but blkn gets
+       * incremented past them!).  Note the inner loop relies on having
+       * allocated the MCU_buffer[] blocks sequentially.
+       */
+      blkn = 0;			/* index of current DCT block within MCU */
+      for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+	compptr = cinfo->cur_comp_info[ci];
+	/* Don't bother to IDCT an uninteresting component. */
+	if (! compptr->component_needed) {
+	  blkn += compptr->MCU_blocks;
+	  continue;
+	}
+	inverse_DCT = cinfo->idct->inverse_DCT[compptr->component_index];
+	useful_width = (MCU_col_num < last_MCU_col) ? compptr->MCU_width
+						    : compptr->last_col_width;
+	output_ptr = output_buf[compptr->component_index] +
+	  yoffset * compptr->DCT_scaled_size;
+	start_col = MCU_col_num * compptr->MCU_sample_width;
+	for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
+	  if (cinfo->input_iMCU_row < last_iMCU_row ||
+	      yoffset+yindex < compptr->last_row_height) {
+	    output_col = start_col;
+	    for (xindex = 0; xindex < useful_width; xindex++) {
+	      (*inverse_DCT) (cinfo, compptr,
+			      (JCOEFPTR) coef->MCU_buffer[blkn+xindex],
+			      output_ptr, output_col);
+	      output_col += compptr->DCT_scaled_size;
+	    }
+	  }
+	  blkn += compptr->MCU_width;
+	  output_ptr += compptr->DCT_scaled_size;
+	}
+      }
+    }
+    /* Completed an MCU row, but perhaps not an iMCU row */
+    coef->MCU_ctr = 0;
+  }
+  /* Completed the iMCU row, advance counters for next one */
+  cinfo->output_iMCU_row++;
+  if (++(cinfo->input_iMCU_row) < cinfo->total_iMCU_rows) {
+    start_iMCU_row(cinfo);
+    return JPEG_ROW_COMPLETED;
+  }
+  /* Completed the scan */
+  (*cinfo->inputctl->finish_input_pass) (cinfo);
+  return JPEG_SCAN_COMPLETED;
+}
+
+
+/*
+ * Dummy consume-input routine for single-pass operation.
+ */
+
+METHODDEF(int)
+dummy_consume_data (j_decompress_ptr cinfo)
+{
+  return JPEG_SUSPENDED;	/* Always indicate nothing was done */
+}
+
+
+#ifdef D_MULTISCAN_FILES_SUPPORTED
+
+/*
+ * Consume input data and store it in the full-image coefficient buffer.
+ * We read as much as one fully interleaved MCU row ("iMCU" row) per call,
+ * ie, v_samp_factor block rows for each component in the scan.
+ * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED.
+ */
+
+METHODDEF(int)
+consume_data (j_decompress_ptr cinfo)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  JDIMENSION MCU_col_num;	/* index of current MCU within row */
+  int blkn, ci, xindex, yindex, yoffset;
+  JDIMENSION start_col;
+  JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN];
+  JBLOCKROW buffer_ptr;
+  jpeg_component_info *compptr;
+
+  /* Align the virtual buffers for the components used in this scan. */
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    buffer[ci] = (*cinfo->mem->access_virt_barray)
+      ((j_common_ptr) cinfo, coef->whole_image[compptr->component_index],
+       cinfo->input_iMCU_row * compptr->v_samp_factor,
+       (JDIMENSION) compptr->v_samp_factor, TRUE);
+    /* Note: entropy decoder expects buffer to be zeroed,
+     * but this is handled automatically by the memory manager
+     * because we requested a pre-zeroed array.
+     */
+  }
+
+  /* Loop to process one whole iMCU row */
+  for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
+       yoffset++) {
+    for (MCU_col_num = coef->MCU_ctr; MCU_col_num < cinfo->MCUs_per_row;
+	 MCU_col_num++) {
+      /* Construct list of pointers to DCT blocks belonging to this MCU */
+      blkn = 0;			/* index of current DCT block within MCU */
+      for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+	compptr = cinfo->cur_comp_info[ci];
+	start_col = MCU_col_num * compptr->MCU_width;
+	for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
+	  buffer_ptr = buffer[ci][yindex+yoffset] + start_col;
+	  for (xindex = 0; xindex < compptr->MCU_width; xindex++) {
+	    coef->MCU_buffer[blkn++] = buffer_ptr++;
+	  }
+	}
+      }
+      /* Try to fetch the MCU. */
+      if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) {
+	/* Suspension forced; update state counters and exit */
+	coef->MCU_vert_offset = yoffset;
+	coef->MCU_ctr = MCU_col_num;
+	return JPEG_SUSPENDED;
+      }
+    }
+    /* Completed an MCU row, but perhaps not an iMCU row */
+    coef->MCU_ctr = 0;
+  }
+  /* Completed the iMCU row, advance counters for next one */
+  if (++(cinfo->input_iMCU_row) < cinfo->total_iMCU_rows) {
+    start_iMCU_row(cinfo);
+    return JPEG_ROW_COMPLETED;
+  }
+  /* Completed the scan */
+  (*cinfo->inputctl->finish_input_pass) (cinfo);
+  return JPEG_SCAN_COMPLETED;
+}
+
+
+/*
+ * Decompress and return some data in the multi-pass case.
+ * Always attempts to emit one fully interleaved MCU row ("iMCU" row).
+ * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED.
+ *
+ * NB: output_buf contains a plane for each component in image.
+ */
+
+METHODDEF(int)
+decompress_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
+  JDIMENSION block_num;
+  int ci, block_row, block_rows;
+  JBLOCKARRAY buffer;
+  JBLOCKROW buffer_ptr;
+  JSAMPARRAY output_ptr;
+  JDIMENSION output_col;
+  jpeg_component_info *compptr;
+  inverse_DCT_method_ptr inverse_DCT;
+
+  /* Force some input to be done if we are getting ahead of the input. */
+  while (cinfo->input_scan_number < cinfo->output_scan_number ||
+	 (cinfo->input_scan_number == cinfo->output_scan_number &&
+	  cinfo->input_iMCU_row <= cinfo->output_iMCU_row)) {
+    if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED)
+      return JPEG_SUSPENDED;
+  }
+
+  /* OK, output from the virtual arrays. */
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Don't bother to IDCT an uninteresting component. */
+    if (! compptr->component_needed)
+      continue;
+    /* Align the virtual buffer for this component. */
+    buffer = (*cinfo->mem->access_virt_barray)
+      ((j_common_ptr) cinfo, coef->whole_image[ci],
+       cinfo->output_iMCU_row * compptr->v_samp_factor,
+       (JDIMENSION) compptr->v_samp_factor, FALSE);
+    /* Count non-dummy DCT block rows in this iMCU row. */
+    if (cinfo->output_iMCU_row < last_iMCU_row)
+      block_rows = compptr->v_samp_factor;
+    else {
+      /* NB: can't use last_row_height here; it is input-side-dependent! */
+      block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
+      if (block_rows == 0) block_rows = compptr->v_samp_factor;
+    }
+    inverse_DCT = cinfo->idct->inverse_DCT[ci];
+    output_ptr = output_buf[ci];
+    /* Loop over all DCT blocks to be processed. */
+    for (block_row = 0; block_row < block_rows; block_row++) {
+      buffer_ptr = buffer[block_row];
+      output_col = 0;
+      for (block_num = 0; block_num < compptr->width_in_blocks; block_num++) {
+	(*inverse_DCT) (cinfo, compptr, (JCOEFPTR) buffer_ptr,
+			output_ptr, output_col);
+	buffer_ptr++;
+	output_col += compptr->DCT_scaled_size;
+      }
+      output_ptr += compptr->DCT_scaled_size;
+    }
+  }
+
+  if (++(cinfo->output_iMCU_row) < cinfo->total_iMCU_rows)
+    return JPEG_ROW_COMPLETED;
+  return JPEG_SCAN_COMPLETED;
+}
+
+#endif /* D_MULTISCAN_FILES_SUPPORTED */
+
+
+#ifdef BLOCK_SMOOTHING_SUPPORTED
+
+/*
+ * This code applies interblock smoothing as described by section K.8
+ * of the JPEG standard: the first 5 AC coefficients are estimated from
+ * the DC values of a DCT block and its 8 neighboring blocks.
+ * We apply smoothing only for progressive JPEG decoding, and only if
+ * the coefficients it can estimate are not yet known to full precision.
+ */
+
+/* Natural-order array positions of the first 5 zigzag-order coefficients */
+#define Q01_POS  1
+#define Q10_POS  8
+#define Q20_POS  16
+#define Q11_POS  9
+#define Q02_POS  2
+
+/*
+ * Determine whether block smoothing is applicable and safe.
+ * We also latch the current states of the coef_bits[] entries for the
+ * AC coefficients; otherwise, if the input side of the decompressor
+ * advances into a new scan, we might think the coefficients are known
+ * more accurately than they really are.
+ */
+
+LOCAL(boolean)
+smoothing_ok (j_decompress_ptr cinfo)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  boolean smoothing_useful = FALSE;
+  int ci, coefi;
+  jpeg_component_info *compptr;
+  JQUANT_TBL * qtable;
+  int * coef_bits;
+  int * coef_bits_latch;
+
+  if (! cinfo->progressive_mode || cinfo->coef_bits == NULL)
+    return FALSE;
+
+  /* Allocate latch area if not already done */
+  if (coef->coef_bits_latch == NULL)
+    coef->coef_bits_latch = (int *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  cinfo->num_components *
+				  (SAVED_COEFS * SIZEOF(int)));
+  coef_bits_latch = coef->coef_bits_latch;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* All components' quantization values must already be latched. */
+    if ((qtable = compptr->quant_table) == NULL)
+      return FALSE;
+    /* Verify DC & first 5 AC quantizers are nonzero to avoid zero-divide. */
+    if (qtable->quantval[0] == 0 ||
+	qtable->quantval[Q01_POS] == 0 ||
+	qtable->quantval[Q10_POS] == 0 ||
+	qtable->quantval[Q20_POS] == 0 ||
+	qtable->quantval[Q11_POS] == 0 ||
+	qtable->quantval[Q02_POS] == 0)
+      return FALSE;
+    /* DC values must be at least partly known for all components. */
+    coef_bits = cinfo->coef_bits[ci];
+    if (coef_bits[0] < 0)
+      return FALSE;
+    /* Block smoothing is helpful if some AC coefficients remain inaccurate. */
+    for (coefi = 1; coefi <= 5; coefi++) {
+      coef_bits_latch[coefi] = coef_bits[coefi];
+      if (coef_bits[coefi] != 0)
+	smoothing_useful = TRUE;
+    }
+    coef_bits_latch += SAVED_COEFS;
+  }
+
+  return smoothing_useful;
+}
+
+
+/*
+ * Variant of decompress_data for use when doing block smoothing.
+ */
+
+METHODDEF(int)
+decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
+{
+  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
+  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
+  JDIMENSION block_num, last_block_column;
+  int ci, block_row, block_rows, access_rows;
+  JBLOCKARRAY buffer;
+  JBLOCKROW buffer_ptr, prev_block_row, next_block_row;
+  JSAMPARRAY output_ptr;
+  JDIMENSION output_col;
+  jpeg_component_info *compptr;
+  inverse_DCT_method_ptr inverse_DCT;
+  boolean first_row, last_row;
+  JBLOCK workspace;
+  int *coef_bits;
+  JQUANT_TBL *quanttbl;
+  INT32 Q00,Q01,Q02,Q10,Q11,Q20, num;
+  int DC1,DC2,DC3,DC4,DC5,DC6,DC7,DC8,DC9;
+  int Al, pred;
+
+  /* Force some input to be done if we are getting ahead of the input. */
+  while (cinfo->input_scan_number <= cinfo->output_scan_number &&
+	 ! cinfo->inputctl->eoi_reached) {
+    if (cinfo->input_scan_number == cinfo->output_scan_number) {
+      /* If input is working on current scan, we ordinarily want it to
+       * have completed the current row.  But if input scan is DC,
+       * we want it to keep one row ahead so that next block row's DC
+       * values are up to date.
+       */
+      JDIMENSION delta = (cinfo->Ss == 0) ? 1 : 0;
+      if (cinfo->input_iMCU_row > cinfo->output_iMCU_row+delta)
+	break;
+    }
+    if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED)
+      return JPEG_SUSPENDED;
+  }
+
+  /* OK, output from the virtual arrays. */
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Don't bother to IDCT an uninteresting component. */
+    if (! compptr->component_needed)
+      continue;
+    /* Count non-dummy DCT block rows in this iMCU row. */
+    if (cinfo->output_iMCU_row < last_iMCU_row) {
+      block_rows = compptr->v_samp_factor;
+      access_rows = block_rows * 2; /* this and next iMCU row */
+      last_row = FALSE;
+    } else {
+      /* NB: can't use last_row_height here; it is input-side-dependent! */
+      block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
+      if (block_rows == 0) block_rows = compptr->v_samp_factor;
+      access_rows = block_rows; /* this iMCU row only */
+      last_row = TRUE;
+    }
+    /* Align the virtual buffer for this component. */
+    if (cinfo->output_iMCU_row > 0) {
+      access_rows += compptr->v_samp_factor; /* prior iMCU row too */
+      buffer = (*cinfo->mem->access_virt_barray)
+	((j_common_ptr) cinfo, coef->whole_image[ci],
+	 (cinfo->output_iMCU_row - 1) * compptr->v_samp_factor,
+	 (JDIMENSION) access_rows, FALSE);
+      buffer += compptr->v_samp_factor;	/* point to current iMCU row */
+      first_row = FALSE;
+    } else {
+      buffer = (*cinfo->mem->access_virt_barray)
+	((j_common_ptr) cinfo, coef->whole_image[ci],
+	 (JDIMENSION) 0, (JDIMENSION) access_rows, FALSE);
+      first_row = TRUE;
+    }
+    /* Fetch component-dependent info */
+    coef_bits = coef->coef_bits_latch + (ci * SAVED_COEFS);
+    quanttbl = compptr->quant_table;
+    Q00 = quanttbl->quantval[0];
+    Q01 = quanttbl->quantval[Q01_POS];
+    Q10 = quanttbl->quantval[Q10_POS];
+    Q20 = quanttbl->quantval[Q20_POS];
+    Q11 = quanttbl->quantval[Q11_POS];
+    Q02 = quanttbl->quantval[Q02_POS];
+    inverse_DCT = cinfo->idct->inverse_DCT[ci];
+    output_ptr = output_buf[ci];
+    /* Loop over all DCT blocks to be processed. */
+    for (block_row = 0; block_row < block_rows; block_row++) {
+      buffer_ptr = buffer[block_row];
+      if (first_row && block_row == 0)
+	prev_block_row = buffer_ptr;
+      else
+	prev_block_row = buffer[block_row-1];
+      if (last_row && block_row == block_rows-1)
+	next_block_row = buffer_ptr;
+      else
+	next_block_row = buffer[block_row+1];
+      /* We fetch the surrounding DC values using a sliding-register approach.
+       * Initialize all nine here so as to do the right thing on narrow pics.
+       */
+      DC1 = DC2 = DC3 = (int) prev_block_row[0][0];
+      DC4 = DC5 = DC6 = (int) buffer_ptr[0][0];
+      DC7 = DC8 = DC9 = (int) next_block_row[0][0];
+      output_col = 0;
+      last_block_column = compptr->width_in_blocks - 1;
+      for (block_num = 0; block_num <= last_block_column; block_num++) {
+	/* Fetch current DCT block into workspace so we can modify it. */
+	jcopy_block_row(buffer_ptr, (JBLOCKROW) workspace, (JDIMENSION) 1);
+	/* Update DC values */
+	if (block_num < last_block_column) {
+	  DC3 = (int) prev_block_row[1][0];
+	  DC6 = (int) buffer_ptr[1][0];
+	  DC9 = (int) next_block_row[1][0];
+	}
+	/* Compute coefficient estimates per K.8.
+	 * An estimate is applied only if coefficient is still zero,
+	 * and is not known to be fully accurate.
+	 */
+	/* AC01 */
+	if ((Al=coef_bits[1]) != 0 && workspace[1] == 0) {
+	  num = 36 * Q00 * (DC4 - DC6);
+	  if (num >= 0) {
+	    pred = (int) (((Q01<<7) + num) / (Q01<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	  } else {
+	    pred = (int) (((Q01<<7) - num) / (Q01<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	    pred = -pred;
+	  }
+	  workspace[1] = (JCOEF) pred;
+	}
+	/* AC10 */
+	if ((Al=coef_bits[2]) != 0 && workspace[8] == 0) {
+	  num = 36 * Q00 * (DC2 - DC8);
+	  if (num >= 0) {
+	    pred = (int) (((Q10<<7) + num) / (Q10<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	  } else {
+	    pred = (int) (((Q10<<7) - num) / (Q10<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	    pred = -pred;
+	  }
+	  workspace[8] = (JCOEF) pred;
+	}
+	/* AC20 */
+	if ((Al=coef_bits[3]) != 0 && workspace[16] == 0) {
+	  num = 9 * Q00 * (DC2 + DC8 - 2*DC5);
+	  if (num >= 0) {
+	    pred = (int) (((Q20<<7) + num) / (Q20<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	  } else {
+	    pred = (int) (((Q20<<7) - num) / (Q20<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	    pred = -pred;
+	  }
+	  workspace[16] = (JCOEF) pred;
+	}
+	/* AC11 */
+	if ((Al=coef_bits[4]) != 0 && workspace[9] == 0) {
+	  num = 5 * Q00 * (DC1 - DC3 - DC7 + DC9);
+	  if (num >= 0) {
+	    pred = (int) (((Q11<<7) + num) / (Q11<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	  } else {
+	    pred = (int) (((Q11<<7) - num) / (Q11<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	    pred = -pred;
+	  }
+	  workspace[9] = (JCOEF) pred;
+	}
+	/* AC02 */
+	if ((Al=coef_bits[5]) != 0 && workspace[2] == 0) {
+	  num = 9 * Q00 * (DC4 + DC6 - 2*DC5);
+	  if (num >= 0) {
+	    pred = (int) (((Q02<<7) + num) / (Q02<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	  } else {
+	    pred = (int) (((Q02<<7) - num) / (Q02<<8));
+	    if (Al > 0 && pred >= (1<<Al))
+	      pred = (1<<Al)-1;
+	    pred = -pred;
+	  }
+	  workspace[2] = (JCOEF) pred;
+	}
+	/* OK, do the IDCT */
+	(*inverse_DCT) (cinfo, compptr, (JCOEFPTR) workspace,
+			output_ptr, output_col);
+	/* Advance for next column */
+	DC1 = DC2; DC2 = DC3;
+	DC4 = DC5; DC5 = DC6;
+	DC7 = DC8; DC8 = DC9;
+	buffer_ptr++, prev_block_row++, next_block_row++;
+	output_col += compptr->DCT_scaled_size;
+      }
+      output_ptr += compptr->DCT_scaled_size;
+    }
+  }
+
+  if (++(cinfo->output_iMCU_row) < cinfo->total_iMCU_rows)
+    return JPEG_ROW_COMPLETED;
+  return JPEG_SCAN_COMPLETED;
+}
+
+#endif /* BLOCK_SMOOTHING_SUPPORTED */
+
+
+/*
+ * Initialize coefficient buffer controller.
+ */
+
+GLOBAL(void)
+jinit_d_coef_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
+{
+  my_coef_ptr coef;
+
+  coef = (my_coef_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_coef_controller));
+  cinfo->coef = (struct jpeg_d_coef_controller *) coef;
+  coef->pub.start_input_pass = start_input_pass;
+  coef->pub.start_output_pass = start_output_pass;
+#ifdef BLOCK_SMOOTHING_SUPPORTED
+  coef->coef_bits_latch = NULL;
+#endif
+
+  /* Create the coefficient buffer. */
+  if (need_full_buffer) {
+#ifdef D_MULTISCAN_FILES_SUPPORTED
+    /* Allocate a full-image virtual array for each component, */
+    /* padded to a multiple of samp_factor DCT blocks in each direction. */
+    /* Note we ask for a pre-zeroed array. */
+    int ci, access_rows;
+    jpeg_component_info *compptr;
+
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	 ci++, compptr++) {
+      access_rows = compptr->v_samp_factor;
+#ifdef BLOCK_SMOOTHING_SUPPORTED
+      /* If block smoothing could be used, need a bigger window */
+      if (cinfo->progressive_mode)
+	access_rows *= 3;
+#endif
+      coef->whole_image[ci] = (*cinfo->mem->request_virt_barray)
+	((j_common_ptr) cinfo, JPOOL_IMAGE, TRUE,
+	 (JDIMENSION) jround_up((long) compptr->width_in_blocks,
+				(long) compptr->h_samp_factor),
+	 (JDIMENSION) jround_up((long) compptr->height_in_blocks,
+				(long) compptr->v_samp_factor),
+	 (JDIMENSION) access_rows);
+    }
+    coef->pub.consume_data = consume_data;
+    coef->pub.decompress_data = decompress_data;
+    coef->pub.coef_arrays = coef->whole_image; /* link to virtual arrays */
+#else
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+  } else {
+    /* We only need a single-MCU buffer. */
+    JBLOCKROW buffer;
+    int i;
+
+    buffer = (JBLOCKROW)
+      (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
+    for (i = 0; i < D_MAX_BLOCKS_IN_MCU; i++) {
+      coef->MCU_buffer[i] = buffer + i;
+    }
+    coef->pub.consume_data = dummy_consume_data;
+    coef->pub.decompress_data = decompress_onepass;
+    coef->pub.coef_arrays = NULL; /* flag for no virtual arrays */
+  }
+}
diff --git a/common/jpeg/jdcolor.c b/common/jpeg/jdcolor.c
new file mode 100644
index 00000000..6c04dfe8
--- /dev/null
+++ b/common/jpeg/jdcolor.c
@@ -0,0 +1,396 @@
+/*
+ * jdcolor.c
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains output colorspace conversion routines.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Private subobject */
+
+typedef struct {
+  struct jpeg_color_deconverter pub; /* public fields */
+
+  /* Private state for YCC->RGB conversion */
+  int * Cr_r_tab;		/* => table for Cr to R conversion */
+  int * Cb_b_tab;		/* => table for Cb to B conversion */
+  INT32 * Cr_g_tab;		/* => table for Cr to G conversion */
+  INT32 * Cb_g_tab;		/* => table for Cb to G conversion */
+} my_color_deconverter;
+
+typedef my_color_deconverter * my_cconvert_ptr;
+
+
+/**************** YCbCr -> RGB conversion: most common case **************/
+
+/*
+ * YCbCr is defined per CCIR 601-1, except that Cb and Cr are
+ * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5.
+ * The conversion equations to be implemented are therefore
+ *	R = Y                + 1.40200 * Cr
+ *	G = Y - 0.34414 * Cb - 0.71414 * Cr
+ *	B = Y + 1.77200 * Cb
+ * where Cb and Cr represent the incoming values less CENTERJSAMPLE.
+ * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.)
+ *
+ * To avoid floating-point arithmetic, we represent the fractional constants
+ * as integers scaled up by 2^16 (about 4 digits precision); we have to divide
+ * the products by 2^16, with appropriate rounding, to get the correct answer.
+ * Notice that Y, being an integral input, does not contribute any fraction
+ * so it need not participate in the rounding.
+ *
+ * For even more speed, we avoid doing any multiplications in the inner loop
+ * by precalculating the constants times Cb and Cr for all possible values.
+ * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table);
+ * for 12-bit samples it is still acceptable.  It's not very reasonable for
+ * 16-bit samples, but if you want lossless storage you shouldn't be changing
+ * colorspace anyway.
+ * The Cr=>R and Cb=>B values can be rounded to integers in advance; the
+ * values for the G calculation are left scaled up, since we must add them
+ * together before rounding.
+ */
+
+#define SCALEBITS	16	/* speediest right-shift on some machines */
+#define ONE_HALF	((INT32) 1 << (SCALEBITS-1))
+#define FIX(x)		((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
+
+
+/*
+ * Initialize tables for YCC->RGB colorspace conversion.
+ */
+
+LOCAL(void)
+build_ycc_rgb_table (j_decompress_ptr cinfo)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  int i;
+  INT32 x;
+  SHIFT_TEMPS
+
+  cconvert->Cr_r_tab = (int *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(MAXJSAMPLE+1) * SIZEOF(int));
+  cconvert->Cb_b_tab = (int *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(MAXJSAMPLE+1) * SIZEOF(int));
+  cconvert->Cr_g_tab = (INT32 *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(MAXJSAMPLE+1) * SIZEOF(INT32));
+  cconvert->Cb_g_tab = (INT32 *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(MAXJSAMPLE+1) * SIZEOF(INT32));
+
+  for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
+    /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
+    /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
+    /* Cr=>R value is nearest int to 1.40200 * x */
+    cconvert->Cr_r_tab[i] = (int)
+		    RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
+    /* Cb=>B value is nearest int to 1.77200 * x */
+    cconvert->Cb_b_tab[i] = (int)
+		    RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
+    /* Cr=>G value is scaled-up -0.71414 * x */
+    cconvert->Cr_g_tab[i] = (- FIX(0.71414)) * x;
+    /* Cb=>G value is scaled-up -0.34414 * x */
+    /* We also add in ONE_HALF so that need not do it in inner loop */
+    cconvert->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF;
+  }
+}
+
+
+/*
+ * Convert some rows of samples to the output colorspace.
+ *
+ * Note that we change from noninterleaved, one-plane-per-component format
+ * to interleaved-pixel format.  The output buffer is therefore three times
+ * as wide as the input buffer.
+ * A starting row offset is provided only for the input buffer.  The caller
+ * can easily adjust the passed output_buf value to accommodate any row
+ * offset required on that side.
+ */
+
+METHODDEF(void)
+ycc_rgb_convert (j_decompress_ptr cinfo,
+		 JSAMPIMAGE input_buf, JDIMENSION input_row,
+		 JSAMPARRAY output_buf, int num_rows)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  register int y, cb, cr;
+  register JSAMPROW outptr;
+  register JSAMPROW inptr0, inptr1, inptr2;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->output_width;
+  /* copy these pointers into registers if possible */
+  register JSAMPLE * range_limit = cinfo->sample_range_limit;
+  register int * Crrtab = cconvert->Cr_r_tab;
+  register int * Cbbtab = cconvert->Cb_b_tab;
+  register INT32 * Crgtab = cconvert->Cr_g_tab;
+  register INT32 * Cbgtab = cconvert->Cb_g_tab;
+  SHIFT_TEMPS
+
+  while (--num_rows >= 0) {
+    inptr0 = input_buf[0][input_row];
+    inptr1 = input_buf[1][input_row];
+    inptr2 = input_buf[2][input_row];
+    input_row++;
+    outptr = *output_buf++;
+    for (col = 0; col < num_cols; col++) {
+      y  = GETJSAMPLE(inptr0[col]);
+      cb = GETJSAMPLE(inptr1[col]);
+      cr = GETJSAMPLE(inptr2[col]);
+      /* Range-limiting is essential due to noise introduced by DCT losses. */
+      outptr[RGB_RED] =   range_limit[y + Crrtab[cr]];
+      outptr[RGB_GREEN] = range_limit[y +
+			      ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
+						 SCALEBITS))];
+      outptr[RGB_BLUE] =  range_limit[y + Cbbtab[cb]];
+      outptr += RGB_PIXELSIZE;
+    }
+  }
+}
+
+
+/**************** Cases other than YCbCr -> RGB **************/
+
+
+/*
+ * Color conversion for no colorspace change: just copy the data,
+ * converting from separate-planes to interleaved representation.
+ */
+
+METHODDEF(void)
+null_convert (j_decompress_ptr cinfo,
+	      JSAMPIMAGE input_buf, JDIMENSION input_row,
+	      JSAMPARRAY output_buf, int num_rows)
+{
+  register JSAMPROW inptr, outptr;
+  register JDIMENSION count;
+  register int num_components = cinfo->num_components;
+  JDIMENSION num_cols = cinfo->output_width;
+  int ci;
+
+  while (--num_rows >= 0) {
+    for (ci = 0; ci < num_components; ci++) {
+      inptr = input_buf[ci][input_row];
+      outptr = output_buf[0] + ci;
+      for (count = num_cols; count > 0; count--) {
+	*outptr = *inptr++;	/* needn't bother with GETJSAMPLE() here */
+	outptr += num_components;
+      }
+    }
+    input_row++;
+    output_buf++;
+  }
+}
+
+
+/*
+ * Color conversion for grayscale: just copy the data.
+ * This also works for YCbCr -> grayscale conversion, in which
+ * we just copy the Y (luminance) component and ignore chrominance.
+ */
+
+METHODDEF(void)
+grayscale_convert (j_decompress_ptr cinfo,
+		   JSAMPIMAGE input_buf, JDIMENSION input_row,
+		   JSAMPARRAY output_buf, int num_rows)
+{
+  jcopy_sample_rows(input_buf[0], (int) input_row, output_buf, 0,
+		    num_rows, cinfo->output_width);
+}
+
+
+/*
+ * Convert grayscale to RGB: just duplicate the graylevel three times.
+ * This is provided to support applications that don't want to cope
+ * with grayscale as a separate case.
+ */
+
+METHODDEF(void)
+gray_rgb_convert (j_decompress_ptr cinfo,
+		  JSAMPIMAGE input_buf, JDIMENSION input_row,
+		  JSAMPARRAY output_buf, int num_rows)
+{
+  register JSAMPROW inptr, outptr;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->output_width;
+
+  while (--num_rows >= 0) {
+    inptr = input_buf[0][input_row++];
+    outptr = *output_buf++;
+    for (col = 0; col < num_cols; col++) {
+      /* We can dispense with GETJSAMPLE() here */
+      outptr[RGB_RED] = outptr[RGB_GREEN] = outptr[RGB_BLUE] = inptr[col];
+      outptr += RGB_PIXELSIZE;
+    }
+  }
+}
+
+
+/*
+ * Adobe-style YCCK->CMYK conversion.
+ * We convert YCbCr to R=1-C, G=1-M, and B=1-Y using the same
+ * conversion as above, while passing K (black) unchanged.
+ * We assume build_ycc_rgb_table has been called.
+ */
+
+METHODDEF(void)
+ycck_cmyk_convert (j_decompress_ptr cinfo,
+		   JSAMPIMAGE input_buf, JDIMENSION input_row,
+		   JSAMPARRAY output_buf, int num_rows)
+{
+  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
+  register int y, cb, cr;
+  register JSAMPROW outptr;
+  register JSAMPROW inptr0, inptr1, inptr2, inptr3;
+  register JDIMENSION col;
+  JDIMENSION num_cols = cinfo->output_width;
+  /* copy these pointers into registers if possible */
+  register JSAMPLE * range_limit = cinfo->sample_range_limit;
+  register int * Crrtab = cconvert->Cr_r_tab;
+  register int * Cbbtab = cconvert->Cb_b_tab;
+  register INT32 * Crgtab = cconvert->Cr_g_tab;
+  register INT32 * Cbgtab = cconvert->Cb_g_tab;
+  SHIFT_TEMPS
+
+  while (--num_rows >= 0) {
+    inptr0 = input_buf[0][input_row];
+    inptr1 = input_buf[1][input_row];
+    inptr2 = input_buf[2][input_row];
+    inptr3 = input_buf[3][input_row];
+    input_row++;
+    outptr = *output_buf++;
+    for (col = 0; col < num_cols; col++) {
+      y  = GETJSAMPLE(inptr0[col]);
+      cb = GETJSAMPLE(inptr1[col]);
+      cr = GETJSAMPLE(inptr2[col]);
+      /* Range-limiting is essential due to noise introduced by DCT losses. */
+      outptr[0] = range_limit[MAXJSAMPLE - (y + Crrtab[cr])];	/* red */
+      outptr[1] = range_limit[MAXJSAMPLE - (y +			/* green */
+			      ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
+						 SCALEBITS)))];
+      outptr[2] = range_limit[MAXJSAMPLE - (y + Cbbtab[cb])];	/* blue */
+      /* K passes through unchanged */
+      outptr[3] = inptr3[col];	/* don't need GETJSAMPLE here */
+      outptr += 4;
+    }
+  }
+}
+
+
+/*
+ * Empty method for start_pass.
+ */
+
+METHODDEF(void)
+start_pass_dcolor (j_decompress_ptr cinfo)
+{
+  /* no work needed */
+}
+
+
+/*
+ * Module initialization routine for output colorspace conversion.
+ */
+
+GLOBAL(void)
+jinit_color_deconverter (j_decompress_ptr cinfo)
+{
+  my_cconvert_ptr cconvert;
+  int ci;
+
+  cconvert = (my_cconvert_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_color_deconverter));
+  cinfo->cconvert = (struct jpeg_color_deconverter *) cconvert;
+  cconvert->pub.start_pass = start_pass_dcolor;
+
+  /* Make sure num_components agrees with jpeg_color_space */
+  switch (cinfo->jpeg_color_space) {
+  case JCS_GRAYSCALE:
+    if (cinfo->num_components != 1)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    break;
+
+  case JCS_RGB:
+  case JCS_YCbCr:
+    if (cinfo->num_components != 3)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    break;
+
+  case JCS_CMYK:
+  case JCS_YCCK:
+    if (cinfo->num_components != 4)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    break;
+
+  default:			/* JCS_UNKNOWN can be anything */
+    if (cinfo->num_components < 1)
+      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
+    break;
+  }
+
+  /* Set out_color_components and conversion method based on requested space.
+   * Also clear the component_needed flags for any unused components,
+   * so that earlier pipeline stages can avoid useless computation.
+   */
+
+  switch (cinfo->out_color_space) {
+  case JCS_GRAYSCALE:
+    cinfo->out_color_components = 1;
+    if (cinfo->jpeg_color_space == JCS_GRAYSCALE ||
+	cinfo->jpeg_color_space == JCS_YCbCr) {
+      cconvert->pub.color_convert = grayscale_convert;
+      /* For color->grayscale conversion, only the Y (0) component is needed */
+      for (ci = 1; ci < cinfo->num_components; ci++)
+	cinfo->comp_info[ci].component_needed = FALSE;
+    } else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_RGB:
+    cinfo->out_color_components = RGB_PIXELSIZE;
+    if (cinfo->jpeg_color_space == JCS_YCbCr) {
+      cconvert->pub.color_convert = ycc_rgb_convert;
+      build_ycc_rgb_table(cinfo);
+    } else if (cinfo->jpeg_color_space == JCS_GRAYSCALE) {
+      cconvert->pub.color_convert = gray_rgb_convert;
+    } else if (cinfo->jpeg_color_space == JCS_RGB && RGB_PIXELSIZE == 3) {
+      cconvert->pub.color_convert = null_convert;
+    } else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  case JCS_CMYK:
+    cinfo->out_color_components = 4;
+    if (cinfo->jpeg_color_space == JCS_YCCK) {
+      cconvert->pub.color_convert = ycck_cmyk_convert;
+      build_ycc_rgb_table(cinfo);
+    } else if (cinfo->jpeg_color_space == JCS_CMYK) {
+      cconvert->pub.color_convert = null_convert;
+    } else
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+
+  default:
+    /* Permit null conversion to same output space */
+    if (cinfo->out_color_space == cinfo->jpeg_color_space) {
+      cinfo->out_color_components = cinfo->num_components;
+      cconvert->pub.color_convert = null_convert;
+    } else			/* unsupported non-null conversion */
+      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
+    break;
+  }
+
+  if (cinfo->quantize_colors)
+    cinfo->output_components = 1; /* single colormapped output component */
+  else
+    cinfo->output_components = cinfo->out_color_components;
+}
diff --git a/common/jpeg/jdct.h b/common/jpeg/jdct.h
new file mode 100644
index 00000000..04192a26
--- /dev/null
+++ b/common/jpeg/jdct.h
@@ -0,0 +1,176 @@
+/*
+ * jdct.h
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This include file contains common declarations for the forward and
+ * inverse DCT modules.  These declarations are private to the DCT managers
+ * (jcdctmgr.c, jddctmgr.c) and the individual DCT algorithms.
+ * The individual DCT algorithms are kept in separate files to ease 
+ * machine-dependent tuning (e.g., assembly coding).
+ */
+
+
+/*
+ * A forward DCT routine is given a pointer to a work area of type DCTELEM[];
+ * the DCT is to be performed in-place in that buffer.  Type DCTELEM is int
+ * for 8-bit samples, INT32 for 12-bit samples.  (NOTE: Floating-point DCT
+ * implementations use an array of type FAST_FLOAT, instead.)
+ * The DCT inputs are expected to be signed (range +-CENTERJSAMPLE).
+ * The DCT outputs are returned scaled up by a factor of 8; they therefore
+ * have a range of +-8K for 8-bit data, +-128K for 12-bit data.  This
+ * convention improves accuracy in integer implementations and saves some
+ * work in floating-point ones.
+ * Quantization of the output coefficients is done by jcdctmgr.c.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+typedef int DCTELEM;		/* 16 or 32 bits is fine */
+#else
+typedef INT32 DCTELEM;		/* must have 32 bits */
+#endif
+
+typedef JMETHOD(void, forward_DCT_method_ptr, (DCTELEM * data));
+typedef JMETHOD(void, float_DCT_method_ptr, (FAST_FLOAT * data));
+
+
+/*
+ * An inverse DCT routine is given a pointer to the input JBLOCK and a pointer
+ * to an output sample array.  The routine must dequantize the input data as
+ * well as perform the IDCT; for dequantization, it uses the multiplier table
+ * pointed to by compptr->dct_table.  The output data is to be placed into the
+ * sample array starting at a specified column.  (Any row offset needed will
+ * be applied to the array pointer before it is passed to the IDCT code.)
+ * Note that the number of samples emitted by the IDCT routine is
+ * DCT_scaled_size * DCT_scaled_size.
+ */
+
+/* typedef inverse_DCT_method_ptr is declared in jpegint.h */
+
+/*
+ * Each IDCT routine has its own ideas about the best dct_table element type.
+ */
+
+typedef MULTIPLIER ISLOW_MULT_TYPE; /* short or int, whichever is faster */
+#if BITS_IN_JSAMPLE == 8
+typedef MULTIPLIER IFAST_MULT_TYPE; /* 16 bits is OK, use short if faster */
+#define IFAST_SCALE_BITS  2	/* fractional bits in scale factors */
+#else
+typedef INT32 IFAST_MULT_TYPE;	/* need 32 bits for scaled quantizers */
+#define IFAST_SCALE_BITS  13	/* fractional bits in scale factors */
+#endif
+typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */
+
+
+/*
+ * Each IDCT routine is responsible for range-limiting its results and
+ * converting them to unsigned form (0..MAXJSAMPLE).  The raw outputs could
+ * be quite far out of range if the input data is corrupt, so a bulletproof
+ * range-limiting step is required.  We use a mask-and-table-lookup method
+ * to do the combined operations quickly.  See the comments with
+ * prepare_range_limit_table (in jdmaster.c) for more info.
+ */
+
+#define IDCT_range_limit(cinfo)  ((cinfo)->sample_range_limit + CENTERJSAMPLE)
+
+#define RANGE_MASK  (MAXJSAMPLE * 4 + 3) /* 2 bits wider than legal samples */
+
+
+/* Short forms of external names for systems with brain-damaged linkers. */
+
+#ifdef NEED_SHORT_EXTERNAL_NAMES
+#define jpeg_fdct_islow		jFDislow
+#define jpeg_fdct_ifast		jFDifast
+#define jpeg_fdct_float		jFDfloat
+#define jpeg_idct_islow		jRDislow
+#define jpeg_idct_ifast		jRDifast
+#define jpeg_idct_float		jRDfloat
+#define jpeg_idct_4x4		jRD4x4
+#define jpeg_idct_2x2		jRD2x2
+#define jpeg_idct_1x1		jRD1x1
+#endif /* NEED_SHORT_EXTERNAL_NAMES */
+
+/* Extern declarations for the forward and inverse DCT routines. */
+
+EXTERN(void) jpeg_fdct_islow JPP((DCTELEM * data));
+EXTERN(void) jpeg_fdct_ifast JPP((DCTELEM * data));
+EXTERN(void) jpeg_fdct_float JPP((FAST_FLOAT * data));
+
+EXTERN(void) jpeg_idct_islow
+    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+EXTERN(void) jpeg_idct_ifast
+    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+EXTERN(void) jpeg_idct_float
+    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+EXTERN(void) jpeg_idct_4x4
+    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+EXTERN(void) jpeg_idct_2x2
+    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+EXTERN(void) jpeg_idct_1x1
+    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
+
+
+/*
+ * Macros for handling fixed-point arithmetic; these are used by many
+ * but not all of the DCT/IDCT modules.
+ *
+ * All values are expected to be of type INT32.
+ * Fractional constants are scaled left by CONST_BITS bits.
+ * CONST_BITS is defined within each module using these macros,
+ * and may differ from one module to the next.
+ */
+
+#define ONE	((INT32) 1)
+#define CONST_SCALE (ONE << CONST_BITS)
+
+/* Convert a positive real constant to an integer scaled by CONST_SCALE.
+ * Caution: some C compilers fail to reduce "FIX(constant)" at compile time,
+ * thus causing a lot of useless floating-point operations at run time.
+ */
+
+#define FIX(x)	((INT32) ((x) * CONST_SCALE + 0.5))
+
+/* Descale and correctly round an INT32 value that's scaled by N bits.
+ * We assume RIGHT_SHIFT rounds towards minus infinity, so adding
+ * the fudge factor is correct for either sign of X.
+ */
+
+#define DESCALE(x,n)  RIGHT_SHIFT((x) + (ONE << ((n)-1)), n)
+
+/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
+ * This macro is used only when the two inputs will actually be no more than
+ * 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a
+ * full 32x32 multiply.  This provides a useful speedup on many machines.
+ * Unfortunately there is no way to specify a 16x16->32 multiply portably
+ * in C, but some C compilers will do the right thing if you provide the
+ * correct combination of casts.
+ */
+
+#ifdef SHORTxSHORT_32		/* may work if 'int' is 32 bits */
+#define MULTIPLY16C16(var,const)  (((INT16) (var)) * ((INT16) (const)))
+#endif
+#ifdef SHORTxLCONST_32		/* known to work with Microsoft C 6.0 */
+#define MULTIPLY16C16(var,const)  (((INT16) (var)) * ((INT32) (const)))
+#endif
+
+#ifndef MULTIPLY16C16		/* default definition */
+#define MULTIPLY16C16(var,const)  ((var) * (const))
+#endif
+
+/* Same except both inputs are variables. */
+
+#ifdef SHORTxSHORT_32		/* may work if 'int' is 32 bits */
+#define MULTIPLY16V16(var1,var2)  (((INT16) (var1)) * ((INT16) (var2)))
+#endif
+
+#ifndef MULTIPLY16V16		/* default definition */
+#define MULTIPLY16V16(var1,var2)  ((var1) * (var2))
+#endif
diff --git a/common/jpeg/jddctmgr.c b/common/jpeg/jddctmgr.c
new file mode 100644
index 00000000..bbf8d0e9
--- /dev/null
+++ b/common/jpeg/jddctmgr.c
@@ -0,0 +1,269 @@
+/*
+ * jddctmgr.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the inverse-DCT management logic.
+ * This code selects a particular IDCT implementation to be used,
+ * and it performs related housekeeping chores.  No code in this file
+ * is executed per IDCT step, only during output pass setup.
+ *
+ * Note that the IDCT routines are responsible for performing coefficient
+ * dequantization as well as the IDCT proper.  This module sets up the
+ * dequantization multiplier table needed by the IDCT routine.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+
+/*
+ * The decompressor input side (jdinput.c) saves away the appropriate
+ * quantization table for each component at the start of the first scan
+ * involving that component.  (This is necessary in order to correctly
+ * decode files that reuse Q-table slots.)
+ * When we are ready to make an output pass, the saved Q-table is converted
+ * to a multiplier table that will actually be used by the IDCT routine.
+ * The multiplier table contents are IDCT-method-dependent.  To support
+ * application changes in IDCT method between scans, we can remake the
+ * multiplier tables if necessary.
+ * In buffered-image mode, the first output pass may occur before any data
+ * has been seen for some components, and thus before their Q-tables have
+ * been saved away.  To handle this case, multiplier tables are preset
+ * to zeroes; the result of the IDCT will be a neutral gray level.
+ */
+
+
+/* Private subobject for this module */
+
+typedef struct {
+  struct jpeg_inverse_dct pub;	/* public fields */
+
+  /* This array contains the IDCT method code that each multiplier table
+   * is currently set up for, or -1 if it's not yet set up.
+   * The actual multiplier tables are pointed to by dct_table in the
+   * per-component comp_info structures.
+   */
+  int cur_method[MAX_COMPONENTS];
+} my_idct_controller;
+
+typedef my_idct_controller * my_idct_ptr;
+
+
+/* Allocated multiplier tables: big enough for any supported variant */
+
+typedef union {
+  ISLOW_MULT_TYPE islow_array[DCTSIZE2];
+#ifdef DCT_IFAST_SUPPORTED
+  IFAST_MULT_TYPE ifast_array[DCTSIZE2];
+#endif
+#ifdef DCT_FLOAT_SUPPORTED
+  FLOAT_MULT_TYPE float_array[DCTSIZE2];
+#endif
+} multiplier_table;
+
+
+/* The current scaled-IDCT routines require ISLOW-style multiplier tables,
+ * so be sure to compile that code if either ISLOW or SCALING is requested.
+ */
+#ifdef DCT_ISLOW_SUPPORTED
+#define PROVIDE_ISLOW_TABLES
+#else
+#ifdef IDCT_SCALING_SUPPORTED
+#define PROVIDE_ISLOW_TABLES
+#endif
+#endif
+
+
+/*
+ * Prepare for an output pass.
+ * Here we select the proper IDCT routine for each component and build
+ * a matching multiplier table.
+ */
+
+METHODDEF(void)
+start_pass (j_decompress_ptr cinfo)
+{
+  my_idct_ptr idct = (my_idct_ptr) cinfo->idct;
+  int ci, i;
+  jpeg_component_info *compptr;
+  int method = 0;
+  inverse_DCT_method_ptr method_ptr = NULL;
+  JQUANT_TBL * qtbl;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Select the proper IDCT routine for this component's scaling */
+    switch (compptr->DCT_scaled_size) {
+#ifdef IDCT_SCALING_SUPPORTED
+    case 1:
+      method_ptr = jpeg_idct_1x1;
+      method = JDCT_ISLOW;	/* jidctred uses islow-style table */
+      break;
+    case 2:
+      method_ptr = jpeg_idct_2x2;
+      method = JDCT_ISLOW;	/* jidctred uses islow-style table */
+      break;
+    case 4:
+      method_ptr = jpeg_idct_4x4;
+      method = JDCT_ISLOW;	/* jidctred uses islow-style table */
+      break;
+#endif
+    case DCTSIZE:
+      switch (cinfo->dct_method) {
+#ifdef DCT_ISLOW_SUPPORTED
+      case JDCT_ISLOW:
+	method_ptr = jpeg_idct_islow;
+	method = JDCT_ISLOW;
+	break;
+#endif
+#ifdef DCT_IFAST_SUPPORTED
+      case JDCT_IFAST:
+	method_ptr = jpeg_idct_ifast;
+	method = JDCT_IFAST;
+	break;
+#endif
+#ifdef DCT_FLOAT_SUPPORTED
+      case JDCT_FLOAT:
+	method_ptr = jpeg_idct_float;
+	method = JDCT_FLOAT;
+	break;
+#endif
+      default:
+	ERREXIT(cinfo, JERR_NOT_COMPILED);
+	break;
+      }
+      break;
+    default:
+      ERREXIT1(cinfo, JERR_BAD_DCTSIZE, compptr->DCT_scaled_size);
+      break;
+    }
+    idct->pub.inverse_DCT[ci] = method_ptr;
+    /* Create multiplier table from quant table.
+     * However, we can skip this if the component is uninteresting
+     * or if we already built the table.  Also, if no quant table
+     * has yet been saved for the component, we leave the
+     * multiplier table all-zero; we'll be reading zeroes from the
+     * coefficient controller's buffer anyway.
+     */
+    if (! compptr->component_needed || idct->cur_method[ci] == method)
+      continue;
+    qtbl = compptr->quant_table;
+    if (qtbl == NULL)		/* happens if no data yet for component */
+      continue;
+    idct->cur_method[ci] = method;
+    switch (method) {
+#ifdef PROVIDE_ISLOW_TABLES
+    case JDCT_ISLOW:
+      {
+	/* For LL&M IDCT method, multipliers are equal to raw quantization
+	 * coefficients, but are stored as ints to ensure access efficiency.
+	 */
+	ISLOW_MULT_TYPE * ismtbl = (ISLOW_MULT_TYPE *) compptr->dct_table;
+	for (i = 0; i < DCTSIZE2; i++) {
+	  ismtbl[i] = (ISLOW_MULT_TYPE) qtbl->quantval[i];
+	}
+      }
+      break;
+#endif
+#ifdef DCT_IFAST_SUPPORTED
+    case JDCT_IFAST:
+      {
+	/* For AA&N IDCT method, multipliers are equal to quantization
+	 * coefficients scaled by scalefactor[row]*scalefactor[col], where
+	 *   scalefactor[0] = 1
+	 *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
+	 * For integer operation, the multiplier table is to be scaled by
+	 * IFAST_SCALE_BITS.
+	 */
+	IFAST_MULT_TYPE * ifmtbl = (IFAST_MULT_TYPE *) compptr->dct_table;
+#define CONST_BITS 14
+	static const INT16 aanscales[DCTSIZE2] = {
+	  /* precomputed values scaled up by 14 bits */
+	  16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
+	  22725, 31521, 29692, 26722, 22725, 17855, 12299,  6270,
+	  21407, 29692, 27969, 25172, 21407, 16819, 11585,  5906,
+	  19266, 26722, 25172, 22654, 19266, 15137, 10426,  5315,
+	  16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
+	  12873, 17855, 16819, 15137, 12873, 10114,  6967,  3552,
+	   8867, 12299, 11585, 10426,  8867,  6967,  4799,  2446,
+	   4520,  6270,  5906,  5315,  4520,  3552,  2446,  1247
+	};
+	SHIFT_TEMPS
+
+	for (i = 0; i < DCTSIZE2; i++) {
+	  ifmtbl[i] = (IFAST_MULT_TYPE)
+	    DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[i],
+				  (INT32) aanscales[i]),
+		    CONST_BITS-IFAST_SCALE_BITS);
+	}
+      }
+      break;
+#endif
+#ifdef DCT_FLOAT_SUPPORTED
+    case JDCT_FLOAT:
+      {
+	/* For float AA&N IDCT method, multipliers are equal to quantization
+	 * coefficients scaled by scalefactor[row]*scalefactor[col], where
+	 *   scalefactor[0] = 1
+	 *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
+	 */
+	FLOAT_MULT_TYPE * fmtbl = (FLOAT_MULT_TYPE *) compptr->dct_table;
+	int row, col;
+	static const double aanscalefactor[DCTSIZE] = {
+	  1.0, 1.387039845, 1.306562965, 1.175875602,
+	  1.0, 0.785694958, 0.541196100, 0.275899379
+	};
+
+	i = 0;
+	for (row = 0; row < DCTSIZE; row++) {
+	  for (col = 0; col < DCTSIZE; col++) {
+	    fmtbl[i] = (FLOAT_MULT_TYPE)
+	      ((double) qtbl->quantval[i] *
+	       aanscalefactor[row] * aanscalefactor[col]);
+	    i++;
+	  }
+	}
+      }
+      break;
+#endif
+    default:
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+      break;
+    }
+  }
+}
+
+
+/*
+ * Initialize IDCT manager.
+ */
+
+GLOBAL(void)
+jinit_inverse_dct (j_decompress_ptr cinfo)
+{
+  my_idct_ptr idct;
+  int ci;
+  jpeg_component_info *compptr;
+
+  idct = (my_idct_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_idct_controller));
+  cinfo->idct = (struct jpeg_inverse_dct *) idct;
+  idct->pub.start_pass = start_pass;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Allocate and pre-zero a multiplier table for each component */
+    compptr->dct_table =
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  SIZEOF(multiplier_table));
+    MEMZERO(compptr->dct_table, SIZEOF(multiplier_table));
+    /* Mark multiplier table not yet set up for any method */
+    idct->cur_method[ci] = -1;
+  }
+}
diff --git a/common/jpeg/jdhuff.c b/common/jpeg/jdhuff.c
new file mode 100644
index 00000000..b5ba39f7
--- /dev/null
+++ b/common/jpeg/jdhuff.c
@@ -0,0 +1,651 @@
+/*
+ * jdhuff.c
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains Huffman entropy decoding routines.
+ *
+ * Much of the complexity here has to do with supporting input suspension.
+ * If the data source module demands suspension, we want to be able to back
+ * up to the start of the current MCU.  To do this, we copy state variables
+ * into local working storage, and update them back to the permanent
+ * storage only upon successful completion of an MCU.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdhuff.h"		/* Declarations shared with jdphuff.c */
+
+
+/*
+ * Expanded entropy decoder object for Huffman decoding.
+ *
+ * The savable_state subrecord contains fields that change within an MCU,
+ * but must not be updated permanently until we complete the MCU.
+ */
+
+typedef struct {
+  int last_dc_val[MAX_COMPS_IN_SCAN]; /* last DC coef for each component */
+} savable_state;
+
+/* This macro is to work around compilers with missing or broken
+ * structure assignment.  You'll need to fix this code if you have
+ * such a compiler and you change MAX_COMPS_IN_SCAN.
+ */
+
+#ifndef NO_STRUCT_ASSIGN
+#define ASSIGN_STATE(dest,src)  ((dest) = (src))
+#else
+#if MAX_COMPS_IN_SCAN == 4
+#define ASSIGN_STATE(dest,src)  \
+	((dest).last_dc_val[0] = (src).last_dc_val[0], \
+	 (dest).last_dc_val[1] = (src).last_dc_val[1], \
+	 (dest).last_dc_val[2] = (src).last_dc_val[2], \
+	 (dest).last_dc_val[3] = (src).last_dc_val[3])
+#endif
+#endif
+
+
+typedef struct {
+  struct jpeg_entropy_decoder pub; /* public fields */
+
+  /* These fields are loaded into local variables at start of each MCU.
+   * In case of suspension, we exit WITHOUT updating them.
+   */
+  bitread_perm_state bitstate;	/* Bit buffer at start of MCU */
+  savable_state saved;		/* Other state at start of MCU */
+
+  /* These fields are NOT loaded into local working state. */
+  unsigned int restarts_to_go;	/* MCUs left in this restart interval */
+
+  /* Pointers to derived tables (these workspaces have image lifespan) */
+  d_derived_tbl * dc_derived_tbls[NUM_HUFF_TBLS];
+  d_derived_tbl * ac_derived_tbls[NUM_HUFF_TBLS];
+
+  /* Precalculated info set up by start_pass for use in decode_mcu: */
+
+  /* Pointers to derived tables to be used for each block within an MCU */
+  d_derived_tbl * dc_cur_tbls[D_MAX_BLOCKS_IN_MCU];
+  d_derived_tbl * ac_cur_tbls[D_MAX_BLOCKS_IN_MCU];
+  /* Whether we care about the DC and AC coefficient values for each block */
+  boolean dc_needed[D_MAX_BLOCKS_IN_MCU];
+  boolean ac_needed[D_MAX_BLOCKS_IN_MCU];
+} huff_entropy_decoder;
+
+typedef huff_entropy_decoder * huff_entropy_ptr;
+
+
+/*
+ * Initialize for a Huffman-compressed scan.
+ */
+
+METHODDEF(void)
+start_pass_huff_decoder (j_decompress_ptr cinfo)
+{
+  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
+  int ci, blkn, dctbl, actbl;
+  jpeg_component_info * compptr;
+
+  /* Check that the scan parameters Ss, Se, Ah/Al are OK for sequential JPEG.
+   * This ought to be an error condition, but we make it a warning because
+   * there are some baseline files out there with all zeroes in these bytes.
+   */
+  if (cinfo->Ss != 0 || cinfo->Se != DCTSIZE2-1 ||
+      cinfo->Ah != 0 || cinfo->Al != 0)
+    WARNMS(cinfo, JWRN_NOT_SEQUENTIAL);
+
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    dctbl = compptr->dc_tbl_no;
+    actbl = compptr->ac_tbl_no;
+    /* Compute derived values for Huffman tables */
+    /* We may do this more than once for a table, but it's not expensive */
+    jpeg_make_d_derived_tbl(cinfo, TRUE, dctbl,
+			    & entropy->dc_derived_tbls[dctbl]);
+    jpeg_make_d_derived_tbl(cinfo, FALSE, actbl,
+			    & entropy->ac_derived_tbls[actbl]);
+    /* Initialize DC predictions to 0 */
+    entropy->saved.last_dc_val[ci] = 0;
+  }
+
+  /* Precalculate decoding info for each block in an MCU of this scan */
+  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+    ci = cinfo->MCU_membership[blkn];
+    compptr = cinfo->cur_comp_info[ci];
+    /* Precalculate which table to use for each block */
+    entropy->dc_cur_tbls[blkn] = entropy->dc_derived_tbls[compptr->dc_tbl_no];
+    entropy->ac_cur_tbls[blkn] = entropy->ac_derived_tbls[compptr->ac_tbl_no];
+    /* Decide whether we really care about the coefficient values */
+    if (compptr->component_needed) {
+      entropy->dc_needed[blkn] = TRUE;
+      /* we don't need the ACs if producing a 1/8th-size image */
+      entropy->ac_needed[blkn] = (compptr->DCT_scaled_size > 1);
+    } else {
+      entropy->dc_needed[blkn] = entropy->ac_needed[blkn] = FALSE;
+    }
+  }
+
+  /* Initialize bitread state variables */
+  entropy->bitstate.bits_left = 0;
+  entropy->bitstate.get_buffer = 0; /* unnecessary, but keeps Purify quiet */
+  entropy->pub.insufficient_data = FALSE;
+
+  /* Initialize restart counter */
+  entropy->restarts_to_go = cinfo->restart_interval;
+}
+
+
+/*
+ * Compute the derived values for a Huffman table.
+ * This routine also performs some validation checks on the table.
+ *
+ * Note this is also used by jdphuff.c.
+ */
+
+GLOBAL(void)
+jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, boolean isDC, int tblno,
+			 d_derived_tbl ** pdtbl)
+{
+  JHUFF_TBL *htbl;
+  d_derived_tbl *dtbl;
+  int p, i, l, si, numsymbols;
+  int lookbits, ctr;
+  char huffsize[257];
+  unsigned int huffcode[257];
+  unsigned int code;
+
+  /* Note that huffsize[] and huffcode[] are filled in code-length order,
+   * paralleling the order of the symbols themselves in htbl->huffval[].
+   */
+
+  /* Find the input Huffman table */
+  if (tblno < 0 || tblno >= NUM_HUFF_TBLS)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
+  htbl =
+    isDC ? cinfo->dc_huff_tbl_ptrs[tblno] : cinfo->ac_huff_tbl_ptrs[tblno];
+  if (htbl == NULL)
+    ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tblno);
+
+  /* Allocate a workspace if we haven't already done so. */
+  if (*pdtbl == NULL)
+    *pdtbl = (d_derived_tbl *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  SIZEOF(d_derived_tbl));
+  dtbl = *pdtbl;
+  dtbl->pub = htbl;		/* fill in back link */
+  
+  /* Figure C.1: make table of Huffman code length for each symbol */
+
+  p = 0;
+  for (l = 1; l <= 16; l++) {
+    i = (int) htbl->bits[l];
+    if (i < 0 || p + i > 256)	/* protect against table overrun */
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    while (i--)
+      huffsize[p++] = (char) l;
+  }
+  huffsize[p] = 0;
+  numsymbols = p;
+  
+  /* Figure C.2: generate the codes themselves */
+  /* We also validate that the counts represent a legal Huffman code tree. */
+  
+  code = 0;
+  si = huffsize[0];
+  p = 0;
+  while (huffsize[p]) {
+    while (((int) huffsize[p]) == si) {
+      huffcode[p++] = code;
+      code++;
+    }
+    /* code is now 1 more than the last code used for codelength si; but
+     * it must still fit in si bits, since no code is allowed to be all ones.
+     */
+    if (((INT32) code) >= (((INT32) 1) << si))
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    code <<= 1;
+    si++;
+  }
+
+  /* Figure F.15: generate decoding tables for bit-sequential decoding */
+
+  p = 0;
+  for (l = 1; l <= 16; l++) {
+    if (htbl->bits[l]) {
+      /* valoffset[l] = huffval[] index of 1st symbol of code length l,
+       * minus the minimum code of length l
+       */
+      dtbl->valoffset[l] = (INT32) p - (INT32) huffcode[p];
+      p += htbl->bits[l];
+      dtbl->maxcode[l] = huffcode[p-1]; /* maximum code of length l */
+    } else {
+      dtbl->maxcode[l] = -1;	/* -1 if no codes of this length */
+    }
+  }
+  dtbl->maxcode[17] = 0xFFFFFL; /* ensures jpeg_huff_decode terminates */
+
+  /* Compute lookahead tables to speed up decoding.
+   * First we set all the table entries to 0, indicating "too long";
+   * then we iterate through the Huffman codes that are short enough and
+   * fill in all the entries that correspond to bit sequences starting
+   * with that code.
+   */
+
+  MEMZERO(dtbl->look_nbits, SIZEOF(dtbl->look_nbits));
+
+  p = 0;
+  for (l = 1; l <= HUFF_LOOKAHEAD; l++) {
+    for (i = 1; i <= (int) htbl->bits[l]; i++, p++) {
+      /* l = current code's length, p = its index in huffcode[] & huffval[]. */
+      /* Generate left-justified code followed by all possible bit sequences */
+      lookbits = huffcode[p] << (HUFF_LOOKAHEAD-l);
+      for (ctr = 1 << (HUFF_LOOKAHEAD-l); ctr > 0; ctr--) {
+	dtbl->look_nbits[lookbits] = l;
+	dtbl->look_sym[lookbits] = htbl->huffval[p];
+	lookbits++;
+      }
+    }
+  }
+
+  /* Validate symbols as being reasonable.
+   * For AC tables, we make no check, but accept all byte values 0..255.
+   * For DC tables, we require the symbols to be in range 0..15.
+   * (Tighter bounds could be applied depending on the data depth and mode,
+   * but this is sufficient to ensure safe decoding.)
+   */
+  if (isDC) {
+    for (i = 0; i < numsymbols; i++) {
+      int sym = htbl->huffval[i];
+      if (sym < 0 || sym > 15)
+	ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+    }
+  }
+}
+
+
+/*
+ * Out-of-line code for bit fetching (shared with jdphuff.c).
+ * See jdhuff.h for info about usage.
+ * Note: current values of get_buffer and bits_left are passed as parameters,
+ * but are returned in the corresponding fields of the state struct.
+ *
+ * On most machines MIN_GET_BITS should be 25 to allow the full 32-bit width
+ * of get_buffer to be used.  (On machines with wider words, an even larger
+ * buffer could be used.)  However, on some machines 32-bit shifts are
+ * quite slow and take time proportional to the number of places shifted.
+ * (This is true with most PC compilers, for instance.)  In this case it may
+ * be a win to set MIN_GET_BITS to the minimum value of 15.  This reduces the
+ * average shift distance at the cost of more calls to jpeg_fill_bit_buffer.
+ */
+
+#ifdef SLOW_SHIFT_32
+#define MIN_GET_BITS  15	/* minimum allowable value */
+#else
+#define MIN_GET_BITS  (BIT_BUF_SIZE-7)
+#endif
+
+
+GLOBAL(boolean)
+jpeg_fill_bit_buffer (bitread_working_state * state,
+		      register bit_buf_type get_buffer, register int bits_left,
+		      int nbits)
+/* Load up the bit buffer to a depth of at least nbits */
+{
+  /* Copy heavily used state fields into locals (hopefully registers) */
+  register const JOCTET * next_input_byte = state->next_input_byte;
+  register size_t bytes_in_buffer = state->bytes_in_buffer;
+  j_decompress_ptr cinfo = state->cinfo;
+
+  /* Attempt to load at least MIN_GET_BITS bits into get_buffer. */
+  /* (It is assumed that no request will be for more than that many bits.) */
+  /* We fail to do so only if we hit a marker or are forced to suspend. */
+
+  if (cinfo->unread_marker == 0) {	/* cannot advance past a marker */
+    while (bits_left < MIN_GET_BITS) {
+      register int c;
+
+      /* Attempt to read a byte */
+      if (bytes_in_buffer == 0) {
+	if (! (*cinfo->src->fill_input_buffer) (cinfo))
+	  return FALSE;
+	next_input_byte = cinfo->src->next_input_byte;
+	bytes_in_buffer = cinfo->src->bytes_in_buffer;
+      }
+      bytes_in_buffer--;
+      c = GETJOCTET(*next_input_byte++);
+
+      /* If it's 0xFF, check and discard stuffed zero byte */
+      if (c == 0xFF) {
+	/* Loop here to discard any padding FF's on terminating marker,
+	 * so that we can save a valid unread_marker value.  NOTE: we will
+	 * accept multiple FF's followed by a 0 as meaning a single FF data
+	 * byte.  This data pattern is not valid according to the standard.
+	 */
+	do {
+	  if (bytes_in_buffer == 0) {
+	    if (! (*cinfo->src->fill_input_buffer) (cinfo))
+	      return FALSE;
+	    next_input_byte = cinfo->src->next_input_byte;
+	    bytes_in_buffer = cinfo->src->bytes_in_buffer;
+	  }
+	  bytes_in_buffer--;
+	  c = GETJOCTET(*next_input_byte++);
+	} while (c == 0xFF);
+
+	if (c == 0) {
+	  /* Found FF/00, which represents an FF data byte */
+	  c = 0xFF;
+	} else {
+	  /* Oops, it's actually a marker indicating end of compressed data.
+	   * Save the marker code for later use.
+	   * Fine point: it might appear that we should save the marker into
+	   * bitread working state, not straight into permanent state.  But
+	   * once we have hit a marker, we cannot need to suspend within the
+	   * current MCU, because we will read no more bytes from the data
+	   * source.  So it is OK to update permanent state right away.
+	   */
+	  cinfo->unread_marker = c;
+	  /* See if we need to insert some fake zero bits. */
+	  goto no_more_bytes;
+	}
+      }
+
+      /* OK, load c into get_buffer */
+      get_buffer = (get_buffer << 8) | c;
+      bits_left += 8;
+    } /* end while */
+  } else {
+  no_more_bytes:
+    /* We get here if we've read the marker that terminates the compressed
+     * data segment.  There should be enough bits in the buffer register
+     * to satisfy the request; if so, no problem.
+     */
+    if (nbits > bits_left) {
+      /* Uh-oh.  Report corrupted data to user and stuff zeroes into
+       * the data stream, so that we can produce some kind of image.
+       * We use a nonvolatile flag to ensure that only one warning message
+       * appears per data segment.
+       */
+      if (! cinfo->entropy->insufficient_data) {
+	WARNMS(cinfo, JWRN_HIT_MARKER);
+	cinfo->entropy->insufficient_data = TRUE;
+      }
+      /* Fill the buffer with zero bits */
+      get_buffer <<= MIN_GET_BITS - bits_left;
+      bits_left = MIN_GET_BITS;
+    }
+  }
+
+  /* Unload the local registers */
+  state->next_input_byte = next_input_byte;
+  state->bytes_in_buffer = bytes_in_buffer;
+  state->get_buffer = get_buffer;
+  state->bits_left = bits_left;
+
+  return TRUE;
+}
+
+
+/*
+ * Out-of-line code for Huffman code decoding.
+ * See jdhuff.h for info about usage.
+ */
+
+GLOBAL(int)
+jpeg_huff_decode (bitread_working_state * state,
+		  register bit_buf_type get_buffer, register int bits_left,
+		  d_derived_tbl * htbl, int min_bits)
+{
+  register int l = min_bits;
+  register INT32 code;
+
+  /* HUFF_DECODE has determined that the code is at least min_bits */
+  /* bits long, so fetch that many bits in one swoop. */
+
+  CHECK_BIT_BUFFER(*state, l, return -1);
+  code = GET_BITS(l);
+
+  /* Collect the rest of the Huffman code one bit at a time. */
+  /* This is per Figure F.16 in the JPEG spec. */
+
+  while (code > htbl->maxcode[l]) {
+    code <<= 1;
+    CHECK_BIT_BUFFER(*state, 1, return -1);
+    code |= GET_BITS(1);
+    l++;
+  }
+
+  /* Unload the local registers */
+  state->get_buffer = get_buffer;
+  state->bits_left = bits_left;
+
+  /* With garbage input we may reach the sentinel value l = 17. */
+
+  if (l > 16) {
+    WARNMS(state->cinfo, JWRN_HUFF_BAD_CODE);
+    return 0;			/* fake a zero as the safest result */
+  }
+
+  return htbl->pub->huffval[ (int) (code + htbl->valoffset[l]) ];
+}
+
+
+/*
+ * Figure F.12: extend sign bit.
+ * On some machines, a shift and add will be faster than a table lookup.
+ */
+
+#ifdef AVOID_TABLES
+
+#define HUFF_EXTEND(x,s)  ((x) < (1<<((s)-1)) ? (x) + (((-1)<<(s)) + 1) : (x))
+
+#else
+
+#define HUFF_EXTEND(x,s)  ((x) < extend_test[s] ? (x) + extend_offset[s] : (x))
+
+static const int extend_test[16] =   /* entry n is 2**(n-1) */
+  { 0, 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
+    0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000 };
+
+static const int extend_offset[16] = /* entry n is (-1 << n) + 1 */
+  { 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
+    ((-1)<<5) + 1, ((-1)<<6) + 1, ((-1)<<7) + 1, ((-1)<<8) + 1,
+    ((-1)<<9) + 1, ((-1)<<10) + 1, ((-1)<<11) + 1, ((-1)<<12) + 1,
+    ((-1)<<13) + 1, ((-1)<<14) + 1, ((-1)<<15) + 1 };
+
+#endif /* AVOID_TABLES */
+
+
+/*
+ * Check for a restart marker & resynchronize decoder.
+ * Returns FALSE if must suspend.
+ */
+
+LOCAL(boolean)
+process_restart (j_decompress_ptr cinfo)
+{
+  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
+  int ci;
+
+  /* Throw away any unused bits remaining in bit buffer; */
+  /* include any full bytes in next_marker's count of discarded bytes */
+  cinfo->marker->discarded_bytes += entropy->bitstate.bits_left / 8;
+  entropy->bitstate.bits_left = 0;
+
+  /* Advance past the RSTn marker */
+  if (! (*cinfo->marker->read_restart_marker) (cinfo))
+    return FALSE;
+
+  /* Re-initialize DC predictions to 0 */
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++)
+    entropy->saved.last_dc_val[ci] = 0;
+
+  /* Reset restart counter */
+  entropy->restarts_to_go = cinfo->restart_interval;
+
+  /* Reset out-of-data flag, unless read_restart_marker left us smack up
+   * against a marker.  In that case we will end up treating the next data
+   * segment as empty, and we can avoid producing bogus output pixels by
+   * leaving the flag set.
+   */
+  if (cinfo->unread_marker == 0)
+    entropy->pub.insufficient_data = FALSE;
+
+  return TRUE;
+}
+
+
+/*
+ * Decode and return one MCU's worth of Huffman-compressed coefficients.
+ * The coefficients are reordered from zigzag order into natural array order,
+ * but are not dequantized.
+ *
+ * The i'th block of the MCU is stored into the block pointed to by
+ * MCU_data[i].  WE ASSUME THIS AREA HAS BEEN ZEROED BY THE CALLER.
+ * (Wholesale zeroing is usually a little faster than retail...)
+ *
+ * Returns FALSE if data source requested suspension.  In that case no
+ * changes have been made to permanent state.  (Exception: some output
+ * coefficients may already have been assigned.  This is harmless for
+ * this module, since we'll just re-assign them on the next call.)
+ */
+
+METHODDEF(boolean)
+decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+{
+  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
+  int blkn;
+  BITREAD_STATE_VARS;
+  savable_state state;
+
+  /* Process restart marker if needed; may have to suspend */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0)
+      if (! process_restart(cinfo))
+	return FALSE;
+  }
+
+  /* If we've run out of data, just leave the MCU set to zeroes.
+   * This way, we return uniform gray for the remainder of the segment.
+   */
+  if (! entropy->pub.insufficient_data) {
+
+    /* Load up working state */
+    BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+    ASSIGN_STATE(state, entropy->saved);
+
+    /* Outer loop handles each block in the MCU */
+
+    for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+      JBLOCKROW block = MCU_data[blkn];
+      d_derived_tbl * dctbl = entropy->dc_cur_tbls[blkn];
+      d_derived_tbl * actbl = entropy->ac_cur_tbls[blkn];
+      register int s, k, r;
+
+      /* Decode a single block's worth of coefficients */
+
+      /* Section F.2.2.1: decode the DC coefficient difference */
+      HUFF_DECODE(s, br_state, dctbl, return FALSE, label1);
+      if (s) {
+	CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	r = GET_BITS(s);
+	s = HUFF_EXTEND(r, s);
+      }
+
+      if (entropy->dc_needed[blkn]) {
+	/* Convert DC difference to actual value, update last_dc_val */
+	int ci = cinfo->MCU_membership[blkn];
+	s += state.last_dc_val[ci];
+	state.last_dc_val[ci] = s;
+	/* Output the DC coefficient (assumes jpeg_natural_order[0] = 0) */
+	(*block)[0] = (JCOEF) s;
+      }
+
+      if (entropy->ac_needed[blkn]) {
+
+	/* Section F.2.2.2: decode the AC coefficients */
+	/* Since zeroes are skipped, output area must be cleared beforehand */
+	for (k = 1; k < DCTSIZE2; k++) {
+	  HUFF_DECODE(s, br_state, actbl, return FALSE, label2);
+      
+	  r = s >> 4;
+	  s &= 15;
+      
+	  if (s) {
+	    k += r;
+	    CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	    r = GET_BITS(s);
+	    s = HUFF_EXTEND(r, s);
+	    /* Output coefficient in natural (dezigzagged) order.
+	     * Note: the extra entries in jpeg_natural_order[] will save us
+	     * if k >= DCTSIZE2, which could happen if the data is corrupted.
+	     */
+	    (*block)[jpeg_natural_order[k]] = (JCOEF) s;
+	  } else {
+	    if (r != 15)
+	      break;
+	    k += 15;
+	  }
+	}
+
+      } else {
+
+	/* Section F.2.2.2: decode the AC coefficients */
+	/* In this path we just discard the values */
+	for (k = 1; k < DCTSIZE2; k++) {
+	  HUFF_DECODE(s, br_state, actbl, return FALSE, label3);
+      
+	  r = s >> 4;
+	  s &= 15;
+      
+	  if (s) {
+	    k += r;
+	    CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	    DROP_BITS(s);
+	  } else {
+	    if (r != 15)
+	      break;
+	    k += 15;
+	  }
+	}
+
+      }
+    }
+
+    /* Completed MCU, so update state */
+    BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+    ASSIGN_STATE(entropy->saved, state);
+  }
+
+  /* Account for restart interval (no-op if not using restarts) */
+  entropy->restarts_to_go--;
+
+  return TRUE;
+}
+
+
+/*
+ * Module initialization routine for Huffman entropy decoding.
+ */
+
+GLOBAL(void)
+jinit_huff_decoder (j_decompress_ptr cinfo)
+{
+  huff_entropy_ptr entropy;
+  int i;
+
+  entropy = (huff_entropy_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(huff_entropy_decoder));
+  cinfo->entropy = (struct jpeg_entropy_decoder *) entropy;
+  entropy->pub.start_pass = start_pass_huff_decoder;
+  entropy->pub.decode_mcu = decode_mcu;
+
+  /* Mark tables unallocated */
+  for (i = 0; i < NUM_HUFF_TBLS; i++) {
+    entropy->dc_derived_tbls[i] = entropy->ac_derived_tbls[i] = NULL;
+  }
+}
diff --git a/common/jpeg/jdhuff.h b/common/jpeg/jdhuff.h
new file mode 100644
index 00000000..ae19b6ca
--- /dev/null
+++ b/common/jpeg/jdhuff.h
@@ -0,0 +1,201 @@
+/*
+ * jdhuff.h
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains declarations for Huffman entropy decoding routines
+ * that are shared between the sequential decoder (jdhuff.c) and the
+ * progressive decoder (jdphuff.c).  No other modules need to see these.
+ */
+
+/* Short forms of external names for systems with brain-damaged linkers. */
+
+#ifdef NEED_SHORT_EXTERNAL_NAMES
+#define jpeg_make_d_derived_tbl	jMkDDerived
+#define jpeg_fill_bit_buffer	jFilBitBuf
+#define jpeg_huff_decode	jHufDecode
+#endif /* NEED_SHORT_EXTERNAL_NAMES */
+
+
+/* Derived data constructed for each Huffman table */
+
+#define HUFF_LOOKAHEAD	8	/* # of bits of lookahead */
+
+typedef struct {
+  /* Basic tables: (element [0] of each array is unused) */
+  INT32 maxcode[18];		/* largest code of length k (-1 if none) */
+  /* (maxcode[17] is a sentinel to ensure jpeg_huff_decode terminates) */
+  INT32 valoffset[17];		/* huffval[] offset for codes of length k */
+  /* valoffset[k] = huffval[] index of 1st symbol of code length k, less
+   * the smallest code of length k; so given a code of length k, the
+   * corresponding symbol is huffval[code + valoffset[k]]
+   */
+
+  /* Link to public Huffman table (needed only in jpeg_huff_decode) */
+  JHUFF_TBL *pub;
+
+  /* Lookahead tables: indexed by the next HUFF_LOOKAHEAD bits of
+   * the input data stream.  If the next Huffman code is no more
+   * than HUFF_LOOKAHEAD bits long, we can obtain its length and
+   * the corresponding symbol directly from these tables.
+   */
+  int look_nbits[1<<HUFF_LOOKAHEAD]; /* # bits, or 0 if too long */
+  UINT8 look_sym[1<<HUFF_LOOKAHEAD]; /* symbol, or unused */
+} d_derived_tbl;
+
+/* Expand a Huffman table definition into the derived format */
+EXTERN(void) jpeg_make_d_derived_tbl
+	JPP((j_decompress_ptr cinfo, boolean isDC, int tblno,
+	     d_derived_tbl ** pdtbl));
+
+
+/*
+ * Fetching the next N bits from the input stream is a time-critical operation
+ * for the Huffman decoders.  We implement it with a combination of inline
+ * macros and out-of-line subroutines.  Note that N (the number of bits
+ * demanded at one time) never exceeds 15 for JPEG use.
+ *
+ * We read source bytes into get_buffer and dole out bits as needed.
+ * If get_buffer already contains enough bits, they are fetched in-line
+ * by the macros CHECK_BIT_BUFFER and GET_BITS.  When there aren't enough
+ * bits, jpeg_fill_bit_buffer is called; it will attempt to fill get_buffer
+ * as full as possible (not just to the number of bits needed; this
+ * prefetching reduces the overhead cost of calling jpeg_fill_bit_buffer).
+ * Note that jpeg_fill_bit_buffer may return FALSE to indicate suspension.
+ * On TRUE return, jpeg_fill_bit_buffer guarantees that get_buffer contains
+ * at least the requested number of bits --- dummy zeroes are inserted if
+ * necessary.
+ */
+
+typedef INT32 bit_buf_type;	/* type of bit-extraction buffer */
+#define BIT_BUF_SIZE  32	/* size of buffer in bits */
+
+/* If long is > 32 bits on your machine, and shifting/masking longs is
+ * reasonably fast, making bit_buf_type be long and setting BIT_BUF_SIZE
+ * appropriately should be a win.  Unfortunately we can't define the size
+ * with something like  #define BIT_BUF_SIZE (sizeof(bit_buf_type)*8)
+ * because not all machines measure sizeof in 8-bit bytes.
+ */
+
+typedef struct {		/* Bitreading state saved across MCUs */
+  bit_buf_type get_buffer;	/* current bit-extraction buffer */
+  int bits_left;		/* # of unused bits in it */
+} bitread_perm_state;
+
+typedef struct {		/* Bitreading working state within an MCU */
+  /* Current data source location */
+  /* We need a copy, rather than munging the original, in case of suspension */
+  const JOCTET * next_input_byte; /* => next byte to read from source */
+  size_t bytes_in_buffer;	/* # of bytes remaining in source buffer */
+  /* Bit input buffer --- note these values are kept in register variables,
+   * not in this struct, inside the inner loops.
+   */
+  bit_buf_type get_buffer;	/* current bit-extraction buffer */
+  int bits_left;		/* # of unused bits in it */
+  /* Pointer needed by jpeg_fill_bit_buffer. */
+  j_decompress_ptr cinfo;	/* back link to decompress master record */
+} bitread_working_state;
+
+/* Macros to declare and load/save bitread local variables. */
+#define BITREAD_STATE_VARS  \
+	register bit_buf_type get_buffer;  \
+	register int bits_left;  \
+	bitread_working_state br_state
+
+#define BITREAD_LOAD_STATE(cinfop,permstate)  \
+	br_state.cinfo = cinfop; \
+	br_state.next_input_byte = cinfop->src->next_input_byte; \
+	br_state.bytes_in_buffer = cinfop->src->bytes_in_buffer; \
+	get_buffer = permstate.get_buffer; \
+	bits_left = permstate.bits_left;
+
+#define BITREAD_SAVE_STATE(cinfop,permstate)  \
+	cinfop->src->next_input_byte = br_state.next_input_byte; \
+	cinfop->src->bytes_in_buffer = br_state.bytes_in_buffer; \
+	permstate.get_buffer = get_buffer; \
+	permstate.bits_left = bits_left
+
+/*
+ * These macros provide the in-line portion of bit fetching.
+ * Use CHECK_BIT_BUFFER to ensure there are N bits in get_buffer
+ * before using GET_BITS, PEEK_BITS, or DROP_BITS.
+ * The variables get_buffer and bits_left are assumed to be locals,
+ * but the state struct might not be (jpeg_huff_decode needs this).
+ *	CHECK_BIT_BUFFER(state,n,action);
+ *		Ensure there are N bits in get_buffer; if suspend, take action.
+ *      val = GET_BITS(n);
+ *		Fetch next N bits.
+ *      val = PEEK_BITS(n);
+ *		Fetch next N bits without removing them from the buffer.
+ *	DROP_BITS(n);
+ *		Discard next N bits.
+ * The value N should be a simple variable, not an expression, because it
+ * is evaluated multiple times.
+ */
+
+#define CHECK_BIT_BUFFER(state,nbits,action) \
+	{ if (bits_left < (nbits)) {  \
+	    if (! jpeg_fill_bit_buffer(&(state),get_buffer,bits_left,nbits))  \
+	      { action; }  \
+	    get_buffer = (state).get_buffer; bits_left = (state).bits_left; } }
+
+#define GET_BITS(nbits) \
+	(((int) (get_buffer >> (bits_left -= (nbits)))) & ((1<<(nbits))-1))
+
+#define PEEK_BITS(nbits) \
+	(((int) (get_buffer >> (bits_left -  (nbits)))) & ((1<<(nbits))-1))
+
+#define DROP_BITS(nbits) \
+	(bits_left -= (nbits))
+
+/* Load up the bit buffer to a depth of at least nbits */
+EXTERN(boolean) jpeg_fill_bit_buffer
+	JPP((bitread_working_state * state, register bit_buf_type get_buffer,
+	     register int bits_left, int nbits));
+
+
+/*
+ * Code for extracting next Huffman-coded symbol from input bit stream.
+ * Again, this is time-critical and we make the main paths be macros.
+ *
+ * We use a lookahead table to process codes of up to HUFF_LOOKAHEAD bits
+ * without looping.  Usually, more than 95% of the Huffman codes will be 8
+ * or fewer bits long.  The few overlength codes are handled with a loop,
+ * which need not be inline code.
+ *
+ * Notes about the HUFF_DECODE macro:
+ * 1. Near the end of the data segment, we may fail to get enough bits
+ *    for a lookahead.  In that case, we do it the hard way.
+ * 2. If the lookahead table contains no entry, the next code must be
+ *    more than HUFF_LOOKAHEAD bits long.
+ * 3. jpeg_huff_decode returns -1 if forced to suspend.
+ */
+
+#define HUFF_DECODE(result,state,htbl,failaction,slowlabel) \
+{ register int nb, look; \
+  if (bits_left < HUFF_LOOKAHEAD) { \
+    if (! jpeg_fill_bit_buffer(&state,get_buffer,bits_left, 0)) {failaction;} \
+    get_buffer = state.get_buffer; bits_left = state.bits_left; \
+    if (bits_left < HUFF_LOOKAHEAD) { \
+      nb = 1; goto slowlabel; \
+    } \
+  } \
+  look = PEEK_BITS(HUFF_LOOKAHEAD); \
+  if ((nb = htbl->look_nbits[look]) != 0) { \
+    DROP_BITS(nb); \
+    result = htbl->look_sym[look]; \
+  } else { \
+    nb = HUFF_LOOKAHEAD+1; \
+slowlabel: \
+    if ((result=jpeg_huff_decode(&state,get_buffer,bits_left,htbl,nb)) < 0) \
+	{ failaction; } \
+    get_buffer = state.get_buffer; bits_left = state.bits_left; \
+  } \
+}
+
+/* Out-of-line case for Huffman code fetching */
+EXTERN(int) jpeg_huff_decode
+	JPP((bitread_working_state * state, register bit_buf_type get_buffer,
+	     register int bits_left, d_derived_tbl * htbl, int min_bits));
diff --git a/common/jpeg/jdinput.c b/common/jpeg/jdinput.c
new file mode 100644
index 00000000..0c2ac8f1
--- /dev/null
+++ b/common/jpeg/jdinput.c
@@ -0,0 +1,381 @@
+/*
+ * jdinput.c
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains input control logic for the JPEG decompressor.
+ * These routines are concerned with controlling the decompressor's input
+ * processing (marker reading and coefficient decoding).  The actual input
+ * reading is done in jdmarker.c, jdhuff.c, and jdphuff.c.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Private state */
+
+typedef struct {
+  struct jpeg_input_controller pub; /* public fields */
+
+  boolean inheaders;		/* TRUE until first SOS is reached */
+} my_input_controller;
+
+typedef my_input_controller * my_inputctl_ptr;
+
+
+/* Forward declarations */
+METHODDEF(int) consume_markers JPP((j_decompress_ptr cinfo));
+
+
+/*
+ * Routines to calculate various quantities related to the size of the image.
+ */
+
+LOCAL(void)
+initial_setup (j_decompress_ptr cinfo)
+/* Called once, when first SOS marker is reached */
+{
+  int ci;
+  jpeg_component_info *compptr;
+
+  /* Make sure image isn't bigger than I can handle */
+  if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION ||
+      (long) cinfo->image_width > (long) JPEG_MAX_DIMENSION)
+    ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION);
+
+  /* For now, precision must match compiled-in value... */
+  if (cinfo->data_precision != BITS_IN_JSAMPLE)
+    ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
+
+  /* Check that number of components won't exceed internal array sizes */
+  if (cinfo->num_components > MAX_COMPONENTS)
+    ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
+	     MAX_COMPONENTS);
+
+  /* Compute maximum sampling factors; check factor validity */
+  cinfo->max_h_samp_factor = 1;
+  cinfo->max_v_samp_factor = 1;
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR ||
+	compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR)
+      ERREXIT(cinfo, JERR_BAD_SAMPLING);
+    cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor,
+				   compptr->h_samp_factor);
+    cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor,
+				   compptr->v_samp_factor);
+  }
+
+  /* We initialize DCT_scaled_size and min_DCT_scaled_size to DCTSIZE.
+   * In the full decompressor, this will be overridden by jdmaster.c;
+   * but in the transcoder, jdmaster.c is not used, so we must do it here.
+   */
+  cinfo->min_DCT_scaled_size = DCTSIZE;
+
+  /* Compute dimensions of components */
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    compptr->DCT_scaled_size = DCTSIZE;
+    /* Size in DCT blocks */
+    compptr->width_in_blocks = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor,
+		    (long) (cinfo->max_h_samp_factor * DCTSIZE));
+    compptr->height_in_blocks = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor,
+		    (long) (cinfo->max_v_samp_factor * DCTSIZE));
+    /* downsampled_width and downsampled_height will also be overridden by
+     * jdmaster.c if we are doing full decompression.  The transcoder library
+     * doesn't use these values, but the calling application might.
+     */
+    /* Size in samples */
+    compptr->downsampled_width = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor,
+		    (long) cinfo->max_h_samp_factor);
+    compptr->downsampled_height = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor,
+		    (long) cinfo->max_v_samp_factor);
+    /* Mark component needed, until color conversion says otherwise */
+    compptr->component_needed = TRUE;
+    /* Mark no quantization table yet saved for component */
+    compptr->quant_table = NULL;
+  }
+
+  /* Compute number of fully interleaved MCU rows. */
+  cinfo->total_iMCU_rows = (JDIMENSION)
+    jdiv_round_up((long) cinfo->image_height,
+		  (long) (cinfo->max_v_samp_factor*DCTSIZE));
+
+  /* Decide whether file contains multiple scans */
+  if (cinfo->comps_in_scan < cinfo->num_components || cinfo->progressive_mode)
+    cinfo->inputctl->has_multiple_scans = TRUE;
+  else
+    cinfo->inputctl->has_multiple_scans = FALSE;
+}
+
+
+LOCAL(void)
+per_scan_setup (j_decompress_ptr cinfo)
+/* Do computations that are needed before processing a JPEG scan */
+/* cinfo->comps_in_scan and cinfo->cur_comp_info[] were set from SOS marker */
+{
+  int ci, mcublks, tmp;
+  jpeg_component_info *compptr;
+  
+  if (cinfo->comps_in_scan == 1) {
+    
+    /* Noninterleaved (single-component) scan */
+    compptr = cinfo->cur_comp_info[0];
+    
+    /* Overall image size in MCUs */
+    cinfo->MCUs_per_row = compptr->width_in_blocks;
+    cinfo->MCU_rows_in_scan = compptr->height_in_blocks;
+    
+    /* For noninterleaved scan, always one block per MCU */
+    compptr->MCU_width = 1;
+    compptr->MCU_height = 1;
+    compptr->MCU_blocks = 1;
+    compptr->MCU_sample_width = compptr->DCT_scaled_size;
+    compptr->last_col_width = 1;
+    /* For noninterleaved scans, it is convenient to define last_row_height
+     * as the number of block rows present in the last iMCU row.
+     */
+    tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
+    if (tmp == 0) tmp = compptr->v_samp_factor;
+    compptr->last_row_height = tmp;
+    
+    /* Prepare array describing MCU composition */
+    cinfo->blocks_in_MCU = 1;
+    cinfo->MCU_membership[0] = 0;
+    
+  } else {
+    
+    /* Interleaved (multi-component) scan */
+    if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN)
+      ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan,
+	       MAX_COMPS_IN_SCAN);
+    
+    /* Overall image size in MCUs */
+    cinfo->MCUs_per_row = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width,
+		    (long) (cinfo->max_h_samp_factor*DCTSIZE));
+    cinfo->MCU_rows_in_scan = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height,
+		    (long) (cinfo->max_v_samp_factor*DCTSIZE));
+    
+    cinfo->blocks_in_MCU = 0;
+    
+    for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+      compptr = cinfo->cur_comp_info[ci];
+      /* Sampling factors give # of blocks of component in each MCU */
+      compptr->MCU_width = compptr->h_samp_factor;
+      compptr->MCU_height = compptr->v_samp_factor;
+      compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height;
+      compptr->MCU_sample_width = compptr->MCU_width * compptr->DCT_scaled_size;
+      /* Figure number of non-dummy blocks in last MCU column & row */
+      tmp = (int) (compptr->width_in_blocks % compptr->MCU_width);
+      if (tmp == 0) tmp = compptr->MCU_width;
+      compptr->last_col_width = tmp;
+      tmp = (int) (compptr->height_in_blocks % compptr->MCU_height);
+      if (tmp == 0) tmp = compptr->MCU_height;
+      compptr->last_row_height = tmp;
+      /* Prepare array describing MCU composition */
+      mcublks = compptr->MCU_blocks;
+      if (cinfo->blocks_in_MCU + mcublks > D_MAX_BLOCKS_IN_MCU)
+	ERREXIT(cinfo, JERR_BAD_MCU_SIZE);
+      while (mcublks-- > 0) {
+	cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci;
+      }
+    }
+    
+  }
+}
+
+
+/*
+ * Save away a copy of the Q-table referenced by each component present
+ * in the current scan, unless already saved during a prior scan.
+ *
+ * In a multiple-scan JPEG file, the encoder could assign different components
+ * the same Q-table slot number, but change table definitions between scans
+ * so that each component uses a different Q-table.  (The IJG encoder is not
+ * currently capable of doing this, but other encoders might.)  Since we want
+ * to be able to dequantize all the components at the end of the file, this
+ * means that we have to save away the table actually used for each component.
+ * We do this by copying the table at the start of the first scan containing
+ * the component.
+ * The JPEG spec prohibits the encoder from changing the contents of a Q-table
+ * slot between scans of a component using that slot.  If the encoder does so
+ * anyway, this decoder will simply use the Q-table values that were current
+ * at the start of the first scan for the component.
+ *
+ * The decompressor output side looks only at the saved quant tables,
+ * not at the current Q-table slots.
+ */
+
+LOCAL(void)
+latch_quant_tables (j_decompress_ptr cinfo)
+{
+  int ci, qtblno;
+  jpeg_component_info *compptr;
+  JQUANT_TBL * qtbl;
+
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    /* No work if we already saved Q-table for this component */
+    if (compptr->quant_table != NULL)
+      continue;
+    /* Make sure specified quantization table is present */
+    qtblno = compptr->quant_tbl_no;
+    if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS ||
+	cinfo->quant_tbl_ptrs[qtblno] == NULL)
+      ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno);
+    /* OK, save away the quantization table */
+    qtbl = (JQUANT_TBL *)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  SIZEOF(JQUANT_TBL));
+    MEMCOPY(qtbl, cinfo->quant_tbl_ptrs[qtblno], SIZEOF(JQUANT_TBL));
+    compptr->quant_table = qtbl;
+  }
+}
+
+
+/*
+ * Initialize the input modules to read a scan of compressed data.
+ * The first call to this is done by jdmaster.c after initializing
+ * the entire decompressor (during jpeg_start_decompress).
+ * Subsequent calls come from consume_markers, below.
+ */
+
+METHODDEF(void)
+start_input_pass (j_decompress_ptr cinfo)
+{
+  per_scan_setup(cinfo);
+  latch_quant_tables(cinfo);
+  (*cinfo->entropy->start_pass) (cinfo);
+  (*cinfo->coef->start_input_pass) (cinfo);
+  cinfo->inputctl->consume_input = cinfo->coef->consume_data;
+}
+
+
+/*
+ * Finish up after inputting a compressed-data scan.
+ * This is called by the coefficient controller after it's read all
+ * the expected data of the scan.
+ */
+
+METHODDEF(void)
+finish_input_pass (j_decompress_ptr cinfo)
+{
+  cinfo->inputctl->consume_input = consume_markers;
+}
+
+
+/*
+ * Read JPEG markers before, between, or after compressed-data scans.
+ * Change state as necessary when a new scan is reached.
+ * Return value is JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
+ *
+ * The consume_input method pointer points either here or to the
+ * coefficient controller's consume_data routine, depending on whether
+ * we are reading a compressed data segment or inter-segment markers.
+ */
+
+METHODDEF(int)
+consume_markers (j_decompress_ptr cinfo)
+{
+  my_inputctl_ptr inputctl = (my_inputctl_ptr) cinfo->inputctl;
+  int val;
+
+  if (inputctl->pub.eoi_reached) /* After hitting EOI, read no further */
+    return JPEG_REACHED_EOI;
+
+  val = (*cinfo->marker->read_markers) (cinfo);
+
+  switch (val) {
+  case JPEG_REACHED_SOS:	/* Found SOS */
+    if (inputctl->inheaders) {	/* 1st SOS */
+      initial_setup(cinfo);
+      inputctl->inheaders = FALSE;
+      /* Note: start_input_pass must be called by jdmaster.c
+       * before any more input can be consumed.  jdapimin.c is
+       * responsible for enforcing this sequencing.
+       */
+    } else {			/* 2nd or later SOS marker */
+      if (! inputctl->pub.has_multiple_scans)
+	ERREXIT(cinfo, JERR_EOI_EXPECTED); /* Oops, I wasn't expecting this! */
+      start_input_pass(cinfo);
+    }
+    break;
+  case JPEG_REACHED_EOI:	/* Found EOI */
+    inputctl->pub.eoi_reached = TRUE;
+    if (inputctl->inheaders) {	/* Tables-only datastream, apparently */
+      if (cinfo->marker->saw_SOF)
+	ERREXIT(cinfo, JERR_SOF_NO_SOS);
+    } else {
+      /* Prevent infinite loop in coef ctlr's decompress_data routine
+       * if user set output_scan_number larger than number of scans.
+       */
+      if (cinfo->output_scan_number > cinfo->input_scan_number)
+	cinfo->output_scan_number = cinfo->input_scan_number;
+    }
+    break;
+  case JPEG_SUSPENDED:
+    break;
+  }
+
+  return val;
+}
+
+
+/*
+ * Reset state to begin a fresh datastream.
+ */
+
+METHODDEF(void)
+reset_input_controller (j_decompress_ptr cinfo)
+{
+  my_inputctl_ptr inputctl = (my_inputctl_ptr) cinfo->inputctl;
+
+  inputctl->pub.consume_input = consume_markers;
+  inputctl->pub.has_multiple_scans = FALSE; /* "unknown" would be better */
+  inputctl->pub.eoi_reached = FALSE;
+  inputctl->inheaders = TRUE;
+  /* Reset other modules */
+  (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
+  (*cinfo->marker->reset_marker_reader) (cinfo);
+  /* Reset progression state -- would be cleaner if entropy decoder did this */
+  cinfo->coef_bits = NULL;
+}
+
+
+/*
+ * Initialize the input controller module.
+ * This is called only once, when the decompression object is created.
+ */
+
+GLOBAL(void)
+jinit_input_controller (j_decompress_ptr cinfo)
+{
+  my_inputctl_ptr inputctl;
+
+  /* Create subobject in permanent pool */
+  inputctl = (my_inputctl_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+				SIZEOF(my_input_controller));
+  cinfo->inputctl = (struct jpeg_input_controller *) inputctl;
+  /* Initialize method pointers */
+  inputctl->pub.consume_input = consume_markers;
+  inputctl->pub.reset_input_controller = reset_input_controller;
+  inputctl->pub.start_input_pass = start_input_pass;
+  inputctl->pub.finish_input_pass = finish_input_pass;
+  /* Initialize state: can't use reset_input_controller since we don't
+   * want to try to reset other modules yet.
+   */
+  inputctl->pub.has_multiple_scans = FALSE; /* "unknown" would be better */
+  inputctl->pub.eoi_reached = FALSE;
+  inputctl->inheaders = TRUE;
+}
diff --git a/common/jpeg/jdmainct.c b/common/jpeg/jdmainct.c
new file mode 100644
index 00000000..13c956f5
--- /dev/null
+++ b/common/jpeg/jdmainct.c
@@ -0,0 +1,512 @@
+/*
+ * jdmainct.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the main buffer controller for decompression.
+ * The main buffer lies between the JPEG decompressor proper and the
+ * post-processor; it holds downsampled data in the JPEG colorspace.
+ *
+ * Note that this code is bypassed in raw-data mode, since the application
+ * supplies the equivalent of the main buffer in that case.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * In the current system design, the main buffer need never be a full-image
+ * buffer; any full-height buffers will be found inside the coefficient or
+ * postprocessing controllers.  Nonetheless, the main controller is not
+ * trivial.  Its responsibility is to provide context rows for upsampling/
+ * rescaling, and doing this in an efficient fashion is a bit tricky.
+ *
+ * Postprocessor input data is counted in "row groups".  A row group
+ * is defined to be (v_samp_factor * DCT_scaled_size / min_DCT_scaled_size)
+ * sample rows of each component.  (We require DCT_scaled_size values to be
+ * chosen such that these numbers are integers.  In practice DCT_scaled_size
+ * values will likely be powers of two, so we actually have the stronger
+ * condition that DCT_scaled_size / min_DCT_scaled_size is an integer.)
+ * Upsampling will typically produce max_v_samp_factor pixel rows from each
+ * row group (times any additional scale factor that the upsampler is
+ * applying).
+ *
+ * The coefficient controller will deliver data to us one iMCU row at a time;
+ * each iMCU row contains v_samp_factor * DCT_scaled_size sample rows, or
+ * exactly min_DCT_scaled_size row groups.  (This amount of data corresponds
+ * to one row of MCUs when the image is fully interleaved.)  Note that the
+ * number of sample rows varies across components, but the number of row
+ * groups does not.  Some garbage sample rows may be included in the last iMCU
+ * row at the bottom of the image.
+ *
+ * Depending on the vertical scaling algorithm used, the upsampler may need
+ * access to the sample row(s) above and below its current input row group.
+ * The upsampler is required to set need_context_rows TRUE at global selection
+ * time if so.  When need_context_rows is FALSE, this controller can simply
+ * obtain one iMCU row at a time from the coefficient controller and dole it
+ * out as row groups to the postprocessor.
+ *
+ * When need_context_rows is TRUE, this controller guarantees that the buffer
+ * passed to postprocessing contains at least one row group's worth of samples
+ * above and below the row group(s) being processed.  Note that the context
+ * rows "above" the first passed row group appear at negative row offsets in
+ * the passed buffer.  At the top and bottom of the image, the required
+ * context rows are manufactured by duplicating the first or last real sample
+ * row; this avoids having special cases in the upsampling inner loops.
+ *
+ * The amount of context is fixed at one row group just because that's a
+ * convenient number for this controller to work with.  The existing
+ * upsamplers really only need one sample row of context.  An upsampler
+ * supporting arbitrary output rescaling might wish for more than one row
+ * group of context when shrinking the image; tough, we don't handle that.
+ * (This is justified by the assumption that downsizing will be handled mostly
+ * by adjusting the DCT_scaled_size values, so that the actual scale factor at
+ * the upsample step needn't be much less than one.)
+ *
+ * To provide the desired context, we have to retain the last two row groups
+ * of one iMCU row while reading in the next iMCU row.  (The last row group
+ * can't be processed until we have another row group for its below-context,
+ * and so we have to save the next-to-last group too for its above-context.)
+ * We could do this most simply by copying data around in our buffer, but
+ * that'd be very slow.  We can avoid copying any data by creating a rather
+ * strange pointer structure.  Here's how it works.  We allocate a workspace
+ * consisting of M+2 row groups (where M = min_DCT_scaled_size is the number
+ * of row groups per iMCU row).  We create two sets of redundant pointers to
+ * the workspace.  Labeling the physical row groups 0 to M+1, the synthesized
+ * pointer lists look like this:
+ *                   M+1                          M-1
+ * master pointer --> 0         master pointer --> 0
+ *                    1                            1
+ *                   ...                          ...
+ *                   M-3                          M-3
+ *                   M-2                           M
+ *                   M-1                          M+1
+ *                    M                           M-2
+ *                   M+1                          M-1
+ *                    0                            0
+ * We read alternate iMCU rows using each master pointer; thus the last two
+ * row groups of the previous iMCU row remain un-overwritten in the workspace.
+ * The pointer lists are set up so that the required context rows appear to
+ * be adjacent to the proper places when we pass the pointer lists to the
+ * upsampler.
+ *
+ * The above pictures describe the normal state of the pointer lists.
+ * At top and bottom of the image, we diddle the pointer lists to duplicate
+ * the first or last sample row as necessary (this is cheaper than copying
+ * sample rows around).
+ *
+ * This scheme breaks down if M < 2, ie, min_DCT_scaled_size is 1.  In that
+ * situation each iMCU row provides only one row group so the buffering logic
+ * must be different (eg, we must read two iMCU rows before we can emit the
+ * first row group).  For now, we simply do not support providing context
+ * rows when min_DCT_scaled_size is 1.  That combination seems unlikely to
+ * be worth providing --- if someone wants a 1/8th-size preview, they probably
+ * want it quick and dirty, so a context-free upsampler is sufficient.
+ */
+
+
+/* Private buffer controller object */
+
+typedef struct {
+  struct jpeg_d_main_controller pub; /* public fields */
+
+  /* Pointer to allocated workspace (M or M+2 row groups). */
+  JSAMPARRAY buffer[MAX_COMPONENTS];
+
+  boolean buffer_full;		/* Have we gotten an iMCU row from decoder? */
+  JDIMENSION rowgroup_ctr;	/* counts row groups output to postprocessor */
+
+  /* Remaining fields are only used in the context case. */
+
+  /* These are the master pointers to the funny-order pointer lists. */
+  JSAMPIMAGE xbuffer[2];	/* pointers to weird pointer lists */
+
+  int whichptr;			/* indicates which pointer set is now in use */
+  int context_state;		/* process_data state machine status */
+  JDIMENSION rowgroups_avail;	/* row groups available to postprocessor */
+  JDIMENSION iMCU_row_ctr;	/* counts iMCU rows to detect image top/bot */
+} my_main_controller;
+
+typedef my_main_controller * my_main_ptr;
+
+/* context_state values: */
+#define CTX_PREPARE_FOR_IMCU	0	/* need to prepare for MCU row */
+#define CTX_PROCESS_IMCU	1	/* feeding iMCU to postprocessor */
+#define CTX_POSTPONED_ROW	2	/* feeding postponed row group */
+
+
+/* Forward declarations */
+METHODDEF(void) process_data_simple_main
+	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
+	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
+METHODDEF(void) process_data_context_main
+	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
+	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
+#ifdef QUANT_2PASS_SUPPORTED
+METHODDEF(void) process_data_crank_post
+	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
+	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
+#endif
+
+
+LOCAL(void)
+alloc_funny_pointers (j_decompress_ptr cinfo)
+/* Allocate space for the funny pointer lists.
+ * This is done only once, not once per pass.
+ */
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+  int ci, rgroup;
+  int M = cinfo->min_DCT_scaled_size;
+  jpeg_component_info *compptr;
+  JSAMPARRAY xbuf;
+
+  /* Get top-level space for component array pointers.
+   * We alloc both arrays with one call to save a few cycles.
+   */
+  main->xbuffer[0] = (JSAMPIMAGE)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				cinfo->num_components * 2 * SIZEOF(JSAMPARRAY));
+  main->xbuffer[1] = main->xbuffer[0] + cinfo->num_components;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
+      cinfo->min_DCT_scaled_size; /* height of a row group of component */
+    /* Get space for pointer lists --- M+4 row groups in each list.
+     * We alloc both pointer lists with one call to save a few cycles.
+     */
+    xbuf = (JSAMPARRAY)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  2 * (rgroup * (M + 4)) * SIZEOF(JSAMPROW));
+    xbuf += rgroup;		/* want one row group at negative offsets */
+    main->xbuffer[0][ci] = xbuf;
+    xbuf += rgroup * (M + 4);
+    main->xbuffer[1][ci] = xbuf;
+  }
+}
+
+
+LOCAL(void)
+make_funny_pointers (j_decompress_ptr cinfo)
+/* Create the funny pointer lists discussed in the comments above.
+ * The actual workspace is already allocated (in main->buffer),
+ * and the space for the pointer lists is allocated too.
+ * This routine just fills in the curiously ordered lists.
+ * This will be repeated at the beginning of each pass.
+ */
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+  int ci, i, rgroup;
+  int M = cinfo->min_DCT_scaled_size;
+  jpeg_component_info *compptr;
+  JSAMPARRAY buf, xbuf0, xbuf1;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
+      cinfo->min_DCT_scaled_size; /* height of a row group of component */
+    xbuf0 = main->xbuffer[0][ci];
+    xbuf1 = main->xbuffer[1][ci];
+    /* First copy the workspace pointers as-is */
+    buf = main->buffer[ci];
+    for (i = 0; i < rgroup * (M + 2); i++) {
+      xbuf0[i] = xbuf1[i] = buf[i];
+    }
+    /* In the second list, put the last four row groups in swapped order */
+    for (i = 0; i < rgroup * 2; i++) {
+      xbuf1[rgroup*(M-2) + i] = buf[rgroup*M + i];
+      xbuf1[rgroup*M + i] = buf[rgroup*(M-2) + i];
+    }
+    /* The wraparound pointers at top and bottom will be filled later
+     * (see set_wraparound_pointers, below).  Initially we want the "above"
+     * pointers to duplicate the first actual data line.  This only needs
+     * to happen in xbuffer[0].
+     */
+    for (i = 0; i < rgroup; i++) {
+      xbuf0[i - rgroup] = xbuf0[0];
+    }
+  }
+}
+
+
+LOCAL(void)
+set_wraparound_pointers (j_decompress_ptr cinfo)
+/* Set up the "wraparound" pointers at top and bottom of the pointer lists.
+ * This changes the pointer list state from top-of-image to the normal state.
+ */
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+  int ci, i, rgroup;
+  int M = cinfo->min_DCT_scaled_size;
+  jpeg_component_info *compptr;
+  JSAMPARRAY xbuf0, xbuf1;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
+      cinfo->min_DCT_scaled_size; /* height of a row group of component */
+    xbuf0 = main->xbuffer[0][ci];
+    xbuf1 = main->xbuffer[1][ci];
+    for (i = 0; i < rgroup; i++) {
+      xbuf0[i - rgroup] = xbuf0[rgroup*(M+1) + i];
+      xbuf1[i - rgroup] = xbuf1[rgroup*(M+1) + i];
+      xbuf0[rgroup*(M+2) + i] = xbuf0[i];
+      xbuf1[rgroup*(M+2) + i] = xbuf1[i];
+    }
+  }
+}
+
+
+LOCAL(void)
+set_bottom_pointers (j_decompress_ptr cinfo)
+/* Change the pointer lists to duplicate the last sample row at the bottom
+ * of the image.  whichptr indicates which xbuffer holds the final iMCU row.
+ * Also sets rowgroups_avail to indicate number of nondummy row groups in row.
+ */
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+  int ci, i, rgroup, iMCUheight, rows_left;
+  jpeg_component_info *compptr;
+  JSAMPARRAY xbuf;
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Count sample rows in one iMCU row and in one row group */
+    iMCUheight = compptr->v_samp_factor * compptr->DCT_scaled_size;
+    rgroup = iMCUheight / cinfo->min_DCT_scaled_size;
+    /* Count nondummy sample rows remaining for this component */
+    rows_left = (int) (compptr->downsampled_height % (JDIMENSION) iMCUheight);
+    if (rows_left == 0) rows_left = iMCUheight;
+    /* Count nondummy row groups.  Should get same answer for each component,
+     * so we need only do it once.
+     */
+    if (ci == 0) {
+      main->rowgroups_avail = (JDIMENSION) ((rows_left-1) / rgroup + 1);
+    }
+    /* Duplicate the last real sample row rgroup*2 times; this pads out the
+     * last partial rowgroup and ensures at least one full rowgroup of context.
+     */
+    xbuf = main->xbuffer[main->whichptr][ci];
+    for (i = 0; i < rgroup * 2; i++) {
+      xbuf[rows_left + i] = xbuf[rows_left-1];
+    }
+  }
+}
+
+
+/*
+ * Initialize for a processing pass.
+ */
+
+METHODDEF(void)
+start_pass_main (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+
+  switch (pass_mode) {
+  case JBUF_PASS_THRU:
+    if (cinfo->upsample->need_context_rows) {
+      main->pub.process_data = process_data_context_main;
+      make_funny_pointers(cinfo); /* Create the xbuffer[] lists */
+      main->whichptr = 0;	/* Read first iMCU row into xbuffer[0] */
+      main->context_state = CTX_PREPARE_FOR_IMCU;
+      main->iMCU_row_ctr = 0;
+    } else {
+      /* Simple case with no context needed */
+      main->pub.process_data = process_data_simple_main;
+    }
+    main->buffer_full = FALSE;	/* Mark buffer empty */
+    main->rowgroup_ctr = 0;
+    break;
+#ifdef QUANT_2PASS_SUPPORTED
+  case JBUF_CRANK_DEST:
+    /* For last pass of 2-pass quantization, just crank the postprocessor */
+    main->pub.process_data = process_data_crank_post;
+    break;
+#endif
+  default:
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    break;
+  }
+}
+
+
+/*
+ * Process some data.
+ * This handles the simple case where no context is required.
+ */
+
+METHODDEF(void)
+process_data_simple_main (j_decompress_ptr cinfo,
+			  JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+			  JDIMENSION out_rows_avail)
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+  JDIMENSION rowgroups_avail;
+
+  /* Read input data if we haven't filled the main buffer yet */
+  if (! main->buffer_full) {
+    if (! (*cinfo->coef->decompress_data) (cinfo, main->buffer))
+      return;			/* suspension forced, can do nothing more */
+    main->buffer_full = TRUE;	/* OK, we have an iMCU row to work with */
+  }
+
+  /* There are always min_DCT_scaled_size row groups in an iMCU row. */
+  rowgroups_avail = (JDIMENSION) cinfo->min_DCT_scaled_size;
+  /* Note: at the bottom of the image, we may pass extra garbage row groups
+   * to the postprocessor.  The postprocessor has to check for bottom
+   * of image anyway (at row resolution), so no point in us doing it too.
+   */
+
+  /* Feed the postprocessor */
+  (*cinfo->post->post_process_data) (cinfo, main->buffer,
+				     &main->rowgroup_ctr, rowgroups_avail,
+				     output_buf, out_row_ctr, out_rows_avail);
+
+  /* Has postprocessor consumed all the data yet? If so, mark buffer empty */
+  if (main->rowgroup_ctr >= rowgroups_avail) {
+    main->buffer_full = FALSE;
+    main->rowgroup_ctr = 0;
+  }
+}
+
+
+/*
+ * Process some data.
+ * This handles the case where context rows must be provided.
+ */
+
+METHODDEF(void)
+process_data_context_main (j_decompress_ptr cinfo,
+			   JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+			   JDIMENSION out_rows_avail)
+{
+  my_main_ptr main = (my_main_ptr) cinfo->main;
+
+  /* Read input data if we haven't filled the main buffer yet */
+  if (! main->buffer_full) {
+    if (! (*cinfo->coef->decompress_data) (cinfo,
+					   main->xbuffer[main->whichptr]))
+      return;			/* suspension forced, can do nothing more */
+    main->buffer_full = TRUE;	/* OK, we have an iMCU row to work with */
+    main->iMCU_row_ctr++;	/* count rows received */
+  }
+
+  /* Postprocessor typically will not swallow all the input data it is handed
+   * in one call (due to filling the output buffer first).  Must be prepared
+   * to exit and restart.  This switch lets us keep track of how far we got.
+   * Note that each case falls through to the next on successful completion.
+   */
+  switch (main->context_state) {
+  case CTX_POSTPONED_ROW:
+    /* Call postprocessor using previously set pointers for postponed row */
+    (*cinfo->post->post_process_data) (cinfo, main->xbuffer[main->whichptr],
+			&main->rowgroup_ctr, main->rowgroups_avail,
+			output_buf, out_row_ctr, out_rows_avail);
+    if (main->rowgroup_ctr < main->rowgroups_avail)
+      return;			/* Need to suspend */
+    main->context_state = CTX_PREPARE_FOR_IMCU;
+    if (*out_row_ctr >= out_rows_avail)
+      return;			/* Postprocessor exactly filled output buf */
+    /*FALLTHROUGH*/
+  case CTX_PREPARE_FOR_IMCU:
+    /* Prepare to process first M-1 row groups of this iMCU row */
+    main->rowgroup_ctr = 0;
+    main->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_scaled_size - 1);
+    /* Check for bottom of image: if so, tweak pointers to "duplicate"
+     * the last sample row, and adjust rowgroups_avail to ignore padding rows.
+     */
+    if (main->iMCU_row_ctr == cinfo->total_iMCU_rows)
+      set_bottom_pointers(cinfo);
+    main->context_state = CTX_PROCESS_IMCU;
+    /*FALLTHROUGH*/
+  case CTX_PROCESS_IMCU:
+    /* Call postprocessor using previously set pointers */
+    (*cinfo->post->post_process_data) (cinfo, main->xbuffer[main->whichptr],
+			&main->rowgroup_ctr, main->rowgroups_avail,
+			output_buf, out_row_ctr, out_rows_avail);
+    if (main->rowgroup_ctr < main->rowgroups_avail)
+      return;			/* Need to suspend */
+    /* After the first iMCU, change wraparound pointers to normal state */
+    if (main->iMCU_row_ctr == 1)
+      set_wraparound_pointers(cinfo);
+    /* Prepare to load new iMCU row using other xbuffer list */
+    main->whichptr ^= 1;	/* 0=>1 or 1=>0 */
+    main->buffer_full = FALSE;
+    /* Still need to process last row group of this iMCU row, */
+    /* which is saved at index M+1 of the other xbuffer */
+    main->rowgroup_ctr = (JDIMENSION) (cinfo->min_DCT_scaled_size + 1);
+    main->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_scaled_size + 2);
+    main->context_state = CTX_POSTPONED_ROW;
+  }
+}
+
+
+/*
+ * Process some data.
+ * Final pass of two-pass quantization: just call the postprocessor.
+ * Source data will be the postprocessor controller's internal buffer.
+ */
+
+#ifdef QUANT_2PASS_SUPPORTED
+
+METHODDEF(void)
+process_data_crank_post (j_decompress_ptr cinfo,
+			 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+			 JDIMENSION out_rows_avail)
+{
+  (*cinfo->post->post_process_data) (cinfo, (JSAMPIMAGE) NULL,
+				     (JDIMENSION *) NULL, (JDIMENSION) 0,
+				     output_buf, out_row_ctr, out_rows_avail);
+}
+
+#endif /* QUANT_2PASS_SUPPORTED */
+
+
+/*
+ * Initialize main buffer controller.
+ */
+
+GLOBAL(void)
+jinit_d_main_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
+{
+  my_main_ptr main;
+  int ci, rgroup, ngroups;
+  jpeg_component_info *compptr;
+
+  main = (my_main_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_main_controller));
+  cinfo->main = (struct jpeg_d_main_controller *) main;
+  main->pub.start_pass = start_pass_main;
+
+  if (need_full_buffer)		/* shouldn't happen */
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+
+  /* Allocate the workspace.
+   * ngroups is the number of row groups we need.
+   */
+  if (cinfo->upsample->need_context_rows) {
+    if (cinfo->min_DCT_scaled_size < 2) /* unsupported, see comments above */
+      ERREXIT(cinfo, JERR_NOTIMPL);
+    alloc_funny_pointers(cinfo); /* Alloc space for xbuffer[] lists */
+    ngroups = cinfo->min_DCT_scaled_size + 2;
+  } else {
+    ngroups = cinfo->min_DCT_scaled_size;
+  }
+
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
+      cinfo->min_DCT_scaled_size; /* height of a row group of component */
+    main->buffer[ci] = (*cinfo->mem->alloc_sarray)
+			((j_common_ptr) cinfo, JPOOL_IMAGE,
+			 compptr->width_in_blocks * compptr->DCT_scaled_size,
+			 (JDIMENSION) (rgroup * ngroups));
+  }
+}
diff --git a/common/jpeg/jdmarker.c b/common/jpeg/jdmarker.c
new file mode 100644
index 00000000..f4cca8cc
--- /dev/null
+++ b/common/jpeg/jdmarker.c
@@ -0,0 +1,1360 @@
+/*
+ * jdmarker.c
+ *
+ * Copyright (C) 1991-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains routines to decode JPEG datastream markers.
+ * Most of the complexity arises from our desire to support input
+ * suspension: if not all of the data for a marker is available,
+ * we must exit back to the application.  On resumption, we reprocess
+ * the marker.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+typedef enum {			/* JPEG marker codes */
+  M_SOF0  = 0xc0,
+  M_SOF1  = 0xc1,
+  M_SOF2  = 0xc2,
+  M_SOF3  = 0xc3,
+  
+  M_SOF5  = 0xc5,
+  M_SOF6  = 0xc6,
+  M_SOF7  = 0xc7,
+  
+  M_JPG   = 0xc8,
+  M_SOF9  = 0xc9,
+  M_SOF10 = 0xca,
+  M_SOF11 = 0xcb,
+  
+  M_SOF13 = 0xcd,
+  M_SOF14 = 0xce,
+  M_SOF15 = 0xcf,
+  
+  M_DHT   = 0xc4,
+  
+  M_DAC   = 0xcc,
+  
+  M_RST0  = 0xd0,
+  M_RST1  = 0xd1,
+  M_RST2  = 0xd2,
+  M_RST3  = 0xd3,
+  M_RST4  = 0xd4,
+  M_RST5  = 0xd5,
+  M_RST6  = 0xd6,
+  M_RST7  = 0xd7,
+  
+  M_SOI   = 0xd8,
+  M_EOI   = 0xd9,
+  M_SOS   = 0xda,
+  M_DQT   = 0xdb,
+  M_DNL   = 0xdc,
+  M_DRI   = 0xdd,
+  M_DHP   = 0xde,
+  M_EXP   = 0xdf,
+  
+  M_APP0  = 0xe0,
+  M_APP1  = 0xe1,
+  M_APP2  = 0xe2,
+  M_APP3  = 0xe3,
+  M_APP4  = 0xe4,
+  M_APP5  = 0xe5,
+  M_APP6  = 0xe6,
+  M_APP7  = 0xe7,
+  M_APP8  = 0xe8,
+  M_APP9  = 0xe9,
+  M_APP10 = 0xea,
+  M_APP11 = 0xeb,
+  M_APP12 = 0xec,
+  M_APP13 = 0xed,
+  M_APP14 = 0xee,
+  M_APP15 = 0xef,
+  
+  M_JPG0  = 0xf0,
+  M_JPG13 = 0xfd,
+  M_COM   = 0xfe,
+  
+  M_TEM   = 0x01,
+  
+  M_ERROR = 0x100
+} JPEG_MARKER;
+
+
+/* Private state */
+
+typedef struct {
+  struct jpeg_marker_reader pub; /* public fields */
+
+  /* Application-overridable marker processing methods */
+  jpeg_marker_parser_method process_COM;
+  jpeg_marker_parser_method process_APPn[16];
+
+  /* Limit on marker data length to save for each marker type */
+  unsigned int length_limit_COM;
+  unsigned int length_limit_APPn[16];
+
+  /* Status of COM/APPn marker saving */
+  jpeg_saved_marker_ptr cur_marker;	/* NULL if not processing a marker */
+  unsigned int bytes_read;		/* data bytes read so far in marker */
+  /* Note: cur_marker is not linked into marker_list until it's all read. */
+} my_marker_reader;
+
+typedef my_marker_reader * my_marker_ptr;
+
+
+/*
+ * Macros for fetching data from the data source module.
+ *
+ * At all times, cinfo->src->next_input_byte and ->bytes_in_buffer reflect
+ * the current restart point; we update them only when we have reached a
+ * suitable place to restart if a suspension occurs.
+ */
+
+/* Declare and initialize local copies of input pointer/count */
+#define INPUT_VARS(cinfo)  \
+	struct jpeg_source_mgr * datasrc = (cinfo)->src;  \
+	const JOCTET * next_input_byte = datasrc->next_input_byte;  \
+	size_t bytes_in_buffer = datasrc->bytes_in_buffer
+
+/* Unload the local copies --- do this only at a restart boundary */
+#define INPUT_SYNC(cinfo)  \
+	( datasrc->next_input_byte = next_input_byte,  \
+	  datasrc->bytes_in_buffer = bytes_in_buffer )
+
+/* Reload the local copies --- used only in MAKE_BYTE_AVAIL */
+#define INPUT_RELOAD(cinfo)  \
+	( next_input_byte = datasrc->next_input_byte,  \
+	  bytes_in_buffer = datasrc->bytes_in_buffer )
+
+/* Internal macro for INPUT_BYTE and INPUT_2BYTES: make a byte available.
+ * Note we do *not* do INPUT_SYNC before calling fill_input_buffer,
+ * but we must reload the local copies after a successful fill.
+ */
+#define MAKE_BYTE_AVAIL(cinfo,action)  \
+	if (bytes_in_buffer == 0) {  \
+	  if (! (*datasrc->fill_input_buffer) (cinfo))  \
+	    { action; }  \
+	  INPUT_RELOAD(cinfo);  \
+	}
+
+/* Read a byte into variable V.
+ * If must suspend, take the specified action (typically "return FALSE").
+ */
+#define INPUT_BYTE(cinfo,V,action)  \
+	MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \
+		  bytes_in_buffer--; \
+		  V = GETJOCTET(*next_input_byte++); )
+
+/* As above, but read two bytes interpreted as an unsigned 16-bit integer.
+ * V should be declared unsigned int or perhaps INT32.
+ */
+#define INPUT_2BYTES(cinfo,V,action)  \
+	MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \
+		  bytes_in_buffer--; \
+		  V = ((unsigned int) GETJOCTET(*next_input_byte++)) << 8; \
+		  MAKE_BYTE_AVAIL(cinfo,action); \
+		  bytes_in_buffer--; \
+		  V += GETJOCTET(*next_input_byte++); )
+
+
+/*
+ * Routines to process JPEG markers.
+ *
+ * Entry condition: JPEG marker itself has been read and its code saved
+ *   in cinfo->unread_marker; input restart point is just after the marker.
+ *
+ * Exit: if return TRUE, have read and processed any parameters, and have
+ *   updated the restart point to point after the parameters.
+ *   If return FALSE, was forced to suspend before reaching end of
+ *   marker parameters; restart point has not been moved.  Same routine
+ *   will be called again after application supplies more input data.
+ *
+ * This approach to suspension assumes that all of a marker's parameters
+ * can fit into a single input bufferload.  This should hold for "normal"
+ * markers.  Some COM/APPn markers might have large parameter segments
+ * that might not fit.  If we are simply dropping such a marker, we use
+ * skip_input_data to get past it, and thereby put the problem on the
+ * source manager's shoulders.  If we are saving the marker's contents
+ * into memory, we use a slightly different convention: when forced to
+ * suspend, the marker processor updates the restart point to the end of
+ * what it's consumed (ie, the end of the buffer) before returning FALSE.
+ * On resumption, cinfo->unread_marker still contains the marker code,
+ * but the data source will point to the next chunk of marker data.
+ * The marker processor must retain internal state to deal with this.
+ *
+ * Note that we don't bother to avoid duplicate trace messages if a
+ * suspension occurs within marker parameters.  Other side effects
+ * require more care.
+ */
+
+
+LOCAL(boolean)
+get_soi (j_decompress_ptr cinfo)
+/* Process an SOI marker */
+{
+  int i;
+  
+  TRACEMS(cinfo, 1, JTRC_SOI);
+
+  if (cinfo->marker->saw_SOI)
+    ERREXIT(cinfo, JERR_SOI_DUPLICATE);
+
+  /* Reset all parameters that are defined to be reset by SOI */
+
+  for (i = 0; i < NUM_ARITH_TBLS; i++) {
+    cinfo->arith_dc_L[i] = 0;
+    cinfo->arith_dc_U[i] = 1;
+    cinfo->arith_ac_K[i] = 5;
+  }
+  cinfo->restart_interval = 0;
+
+  /* Set initial assumptions for colorspace etc */
+
+  cinfo->jpeg_color_space = JCS_UNKNOWN;
+  cinfo->CCIR601_sampling = FALSE; /* Assume non-CCIR sampling??? */
+
+  cinfo->saw_JFIF_marker = FALSE;
+  cinfo->JFIF_major_version = 1; /* set default JFIF APP0 values */
+  cinfo->JFIF_minor_version = 1;
+  cinfo->density_unit = 0;
+  cinfo->X_density = 1;
+  cinfo->Y_density = 1;
+  cinfo->saw_Adobe_marker = FALSE;
+  cinfo->Adobe_transform = 0;
+
+  cinfo->marker->saw_SOI = TRUE;
+
+  return TRUE;
+}
+
+
+LOCAL(boolean)
+get_sof (j_decompress_ptr cinfo, boolean is_prog, boolean is_arith)
+/* Process a SOFn marker */
+{
+  INT32 length;
+  int c, ci;
+  jpeg_component_info * compptr;
+  INPUT_VARS(cinfo);
+
+  cinfo->progressive_mode = is_prog;
+  cinfo->arith_code = is_arith;
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+
+  INPUT_BYTE(cinfo, cinfo->data_precision, return FALSE);
+  INPUT_2BYTES(cinfo, cinfo->image_height, return FALSE);
+  INPUT_2BYTES(cinfo, cinfo->image_width, return FALSE);
+  INPUT_BYTE(cinfo, cinfo->num_components, return FALSE);
+
+  length -= 8;
+
+  TRACEMS4(cinfo, 1, JTRC_SOF, cinfo->unread_marker,
+	   (int) cinfo->image_width, (int) cinfo->image_height,
+	   cinfo->num_components);
+
+  if (cinfo->marker->saw_SOF)
+    ERREXIT(cinfo, JERR_SOF_DUPLICATE);
+
+  /* We don't support files in which the image height is initially specified */
+  /* as 0 and is later redefined by DNL.  As long as we have to check that,  */
+  /* might as well have a general sanity check. */
+  if (cinfo->image_height <= 0 || cinfo->image_width <= 0
+      || cinfo->num_components <= 0)
+    ERREXIT(cinfo, JERR_EMPTY_IMAGE);
+
+  if (length != (cinfo->num_components * 3))
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
+  if (cinfo->comp_info == NULL)	/* do only once, even if suspend */
+    cinfo->comp_info = (jpeg_component_info *) (*cinfo->mem->alloc_small)
+			((j_common_ptr) cinfo, JPOOL_IMAGE,
+			 cinfo->num_components * SIZEOF(jpeg_component_info));
+  
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    compptr->component_index = ci;
+    INPUT_BYTE(cinfo, compptr->component_id, return FALSE);
+    INPUT_BYTE(cinfo, c, return FALSE);
+    compptr->h_samp_factor = (c >> 4) & 15;
+    compptr->v_samp_factor = (c     ) & 15;
+    INPUT_BYTE(cinfo, compptr->quant_tbl_no, return FALSE);
+
+    TRACEMS4(cinfo, 1, JTRC_SOF_COMPONENT,
+	     compptr->component_id, compptr->h_samp_factor,
+	     compptr->v_samp_factor, compptr->quant_tbl_no);
+  }
+
+  cinfo->marker->saw_SOF = TRUE;
+
+  INPUT_SYNC(cinfo);
+  return TRUE;
+}
+
+
+LOCAL(boolean)
+get_sos (j_decompress_ptr cinfo)
+/* Process a SOS marker */
+{
+  INT32 length;
+  int i, ci, n, c, cc;
+  jpeg_component_info * compptr;
+  INPUT_VARS(cinfo);
+
+  if (! cinfo->marker->saw_SOF)
+    ERREXIT(cinfo, JERR_SOS_NO_SOF);
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+
+  INPUT_BYTE(cinfo, n, return FALSE); /* Number of components */
+
+  TRACEMS1(cinfo, 1, JTRC_SOS, n);
+
+  if (length != (n * 2 + 6) || n < 1 || n > MAX_COMPS_IN_SCAN)
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
+  cinfo->comps_in_scan = n;
+
+  /* Collect the component-spec parameters */
+
+  for (i = 0; i < n; i++) {
+    INPUT_BYTE(cinfo, cc, return FALSE);
+    INPUT_BYTE(cinfo, c, return FALSE);
+    
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	 ci++, compptr++) {
+      if (cc == compptr->component_id)
+	goto id_found;
+    }
+
+    ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc);
+
+  id_found:
+
+    cinfo->cur_comp_info[i] = compptr;
+    compptr->dc_tbl_no = (c >> 4) & 15;
+    compptr->ac_tbl_no = (c     ) & 15;
+    
+    TRACEMS3(cinfo, 1, JTRC_SOS_COMPONENT, cc,
+	     compptr->dc_tbl_no, compptr->ac_tbl_no);
+  }
+
+  /* Collect the additional scan parameters Ss, Se, Ah/Al. */
+  INPUT_BYTE(cinfo, c, return FALSE);
+  cinfo->Ss = c;
+  INPUT_BYTE(cinfo, c, return FALSE);
+  cinfo->Se = c;
+  INPUT_BYTE(cinfo, c, return FALSE);
+  cinfo->Ah = (c >> 4) & 15;
+  cinfo->Al = (c     ) & 15;
+
+  TRACEMS4(cinfo, 1, JTRC_SOS_PARAMS, cinfo->Ss, cinfo->Se,
+	   cinfo->Ah, cinfo->Al);
+
+  /* Prepare to scan data & restart markers */
+  cinfo->marker->next_restart_num = 0;
+
+  /* Count another SOS marker */
+  cinfo->input_scan_number++;
+
+  INPUT_SYNC(cinfo);
+  return TRUE;
+}
+
+
+#ifdef D_ARITH_CODING_SUPPORTED
+
+LOCAL(boolean)
+get_dac (j_decompress_ptr cinfo)
+/* Process a DAC marker */
+{
+  INT32 length;
+  int index, val;
+  INPUT_VARS(cinfo);
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+  length -= 2;
+  
+  while (length > 0) {
+    INPUT_BYTE(cinfo, index, return FALSE);
+    INPUT_BYTE(cinfo, val, return FALSE);
+
+    length -= 2;
+
+    TRACEMS2(cinfo, 1, JTRC_DAC, index, val);
+
+    if (index < 0 || index >= (2*NUM_ARITH_TBLS))
+      ERREXIT1(cinfo, JERR_DAC_INDEX, index);
+
+    if (index >= NUM_ARITH_TBLS) { /* define AC table */
+      cinfo->arith_ac_K[index-NUM_ARITH_TBLS] = (UINT8) val;
+    } else {			/* define DC table */
+      cinfo->arith_dc_L[index] = (UINT8) (val & 0x0F);
+      cinfo->arith_dc_U[index] = (UINT8) (val >> 4);
+      if (cinfo->arith_dc_L[index] > cinfo->arith_dc_U[index])
+	ERREXIT1(cinfo, JERR_DAC_VALUE, val);
+    }
+  }
+
+  if (length != 0)
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
+  INPUT_SYNC(cinfo);
+  return TRUE;
+}
+
+#else /* ! D_ARITH_CODING_SUPPORTED */
+
+#define get_dac(cinfo)  skip_variable(cinfo)
+
+#endif /* D_ARITH_CODING_SUPPORTED */
+
+
+LOCAL(boolean)
+get_dht (j_decompress_ptr cinfo)
+/* Process a DHT marker */
+{
+  INT32 length;
+  UINT8 bits[17];
+  UINT8 huffval[256];
+  int i, index, count;
+  JHUFF_TBL **htblptr;
+  INPUT_VARS(cinfo);
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+  length -= 2;
+  
+  while (length > 16) {
+    INPUT_BYTE(cinfo, index, return FALSE);
+
+    TRACEMS1(cinfo, 1, JTRC_DHT, index);
+      
+    bits[0] = 0;
+    count = 0;
+    for (i = 1; i <= 16; i++) {
+      INPUT_BYTE(cinfo, bits[i], return FALSE);
+      count += bits[i];
+    }
+
+    length -= 1 + 16;
+
+    TRACEMS8(cinfo, 2, JTRC_HUFFBITS,
+	     bits[1], bits[2], bits[3], bits[4],
+	     bits[5], bits[6], bits[7], bits[8]);
+    TRACEMS8(cinfo, 2, JTRC_HUFFBITS,
+	     bits[9], bits[10], bits[11], bits[12],
+	     bits[13], bits[14], bits[15], bits[16]);
+
+    /* Here we just do minimal validation of the counts to avoid walking
+     * off the end of our table space.  jdhuff.c will check more carefully.
+     */
+    if (count > 256 || ((INT32) count) > length)
+      ERREXIT(cinfo, JERR_BAD_HUFF_TABLE);
+
+    for (i = 0; i < count; i++)
+      INPUT_BYTE(cinfo, huffval[i], return FALSE);
+
+    length -= count;
+
+    if (index & 0x10) {		/* AC table definition */
+      index -= 0x10;
+      htblptr = &cinfo->ac_huff_tbl_ptrs[index];
+    } else {			/* DC table definition */
+      htblptr = &cinfo->dc_huff_tbl_ptrs[index];
+    }
+
+    if (index < 0 || index >= NUM_HUFF_TBLS)
+      ERREXIT1(cinfo, JERR_DHT_INDEX, index);
+
+    if (*htblptr == NULL)
+      *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
+  
+    MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
+    MEMCOPY((*htblptr)->huffval, huffval, SIZEOF((*htblptr)->huffval));
+  }
+
+  if (length != 0)
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
+  INPUT_SYNC(cinfo);
+  return TRUE;
+}
+
+
+LOCAL(boolean)
+get_dqt (j_decompress_ptr cinfo)
+/* Process a DQT marker */
+{
+  INT32 length;
+  int n, i, prec;
+  unsigned int tmp;
+  JQUANT_TBL *quant_ptr;
+  INPUT_VARS(cinfo);
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+  length -= 2;
+
+  while (length > 0) {
+    INPUT_BYTE(cinfo, n, return FALSE);
+    prec = n >> 4;
+    n &= 0x0F;
+
+    TRACEMS2(cinfo, 1, JTRC_DQT, n, prec);
+
+    if (n >= NUM_QUANT_TBLS)
+      ERREXIT1(cinfo, JERR_DQT_INDEX, n);
+      
+    if (cinfo->quant_tbl_ptrs[n] == NULL)
+      cinfo->quant_tbl_ptrs[n] = jpeg_alloc_quant_table((j_common_ptr) cinfo);
+    quant_ptr = cinfo->quant_tbl_ptrs[n];
+
+    for (i = 0; i < DCTSIZE2; i++) {
+      if (prec)
+	INPUT_2BYTES(cinfo, tmp, return FALSE);
+      else
+	INPUT_BYTE(cinfo, tmp, return FALSE);
+      /* We convert the zigzag-order table to natural array order. */
+      quant_ptr->quantval[jpeg_natural_order[i]] = (UINT16) tmp;
+    }
+
+    if (cinfo->err->trace_level >= 2) {
+      for (i = 0; i < DCTSIZE2; i += 8) {
+	TRACEMS8(cinfo, 2, JTRC_QUANTVALS,
+		 quant_ptr->quantval[i],   quant_ptr->quantval[i+1],
+		 quant_ptr->quantval[i+2], quant_ptr->quantval[i+3],
+		 quant_ptr->quantval[i+4], quant_ptr->quantval[i+5],
+		 quant_ptr->quantval[i+6], quant_ptr->quantval[i+7]);
+      }
+    }
+
+    length -= DCTSIZE2+1;
+    if (prec) length -= DCTSIZE2;
+  }
+
+  if (length != 0)
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
+  INPUT_SYNC(cinfo);
+  return TRUE;
+}
+
+
+LOCAL(boolean)
+get_dri (j_decompress_ptr cinfo)
+/* Process a DRI marker */
+{
+  INT32 length;
+  unsigned int tmp;
+  INPUT_VARS(cinfo);
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+  
+  if (length != 4)
+    ERREXIT(cinfo, JERR_BAD_LENGTH);
+
+  INPUT_2BYTES(cinfo, tmp, return FALSE);
+
+  TRACEMS1(cinfo, 1, JTRC_DRI, tmp);
+
+  cinfo->restart_interval = tmp;
+
+  INPUT_SYNC(cinfo);
+  return TRUE;
+}
+
+
+/*
+ * Routines for processing APPn and COM markers.
+ * These are either saved in memory or discarded, per application request.
+ * APP0 and APP14 are specially checked to see if they are
+ * JFIF and Adobe markers, respectively.
+ */
+
+#define APP0_DATA_LEN	14	/* Length of interesting data in APP0 */
+#define APP14_DATA_LEN	12	/* Length of interesting data in APP14 */
+#define APPN_DATA_LEN	14	/* Must be the largest of the above!! */
+
+
+LOCAL(void)
+examine_app0 (j_decompress_ptr cinfo, JOCTET FAR * data,
+	      unsigned int datalen, INT32 remaining)
+/* Examine first few bytes from an APP0.
+ * Take appropriate action if it is a JFIF marker.
+ * datalen is # of bytes at data[], remaining is length of rest of marker data.
+ */
+{
+  INT32 totallen = (INT32) datalen + remaining;
+
+  if (datalen >= APP0_DATA_LEN &&
+      GETJOCTET(data[0]) == 0x4A &&
+      GETJOCTET(data[1]) == 0x46 &&
+      GETJOCTET(data[2]) == 0x49 &&
+      GETJOCTET(data[3]) == 0x46 &&
+      GETJOCTET(data[4]) == 0) {
+    /* Found JFIF APP0 marker: save info */
+    cinfo->saw_JFIF_marker = TRUE;
+    cinfo->JFIF_major_version = GETJOCTET(data[5]);
+    cinfo->JFIF_minor_version = GETJOCTET(data[6]);
+    cinfo->density_unit = GETJOCTET(data[7]);
+    cinfo->X_density = (GETJOCTET(data[8]) << 8) + GETJOCTET(data[9]);
+    cinfo->Y_density = (GETJOCTET(data[10]) << 8) + GETJOCTET(data[11]);
+    /* Check version.
+     * Major version must be 1, anything else signals an incompatible change.
+     * (We used to treat this as an error, but now it's a nonfatal warning,
+     * because some bozo at Hijaak couldn't read the spec.)
+     * Minor version should be 0..2, but process anyway if newer.
+     */
+    if (cinfo->JFIF_major_version != 1)
+      WARNMS2(cinfo, JWRN_JFIF_MAJOR,
+	      cinfo->JFIF_major_version, cinfo->JFIF_minor_version);
+    /* Generate trace messages */
+    TRACEMS5(cinfo, 1, JTRC_JFIF,
+	     cinfo->JFIF_major_version, cinfo->JFIF_minor_version,
+	     cinfo->X_density, cinfo->Y_density, cinfo->density_unit);
+    /* Validate thumbnail dimensions and issue appropriate messages */
+    if (GETJOCTET(data[12]) | GETJOCTET(data[13]))
+      TRACEMS2(cinfo, 1, JTRC_JFIF_THUMBNAIL,
+	       GETJOCTET(data[12]), GETJOCTET(data[13]));
+    totallen -= APP0_DATA_LEN;
+    if (totallen !=
+	((INT32)GETJOCTET(data[12]) * (INT32)GETJOCTET(data[13]) * (INT32) 3))
+      TRACEMS1(cinfo, 1, JTRC_JFIF_BADTHUMBNAILSIZE, (int) totallen);
+  } else if (datalen >= 6 &&
+      GETJOCTET(data[0]) == 0x4A &&
+      GETJOCTET(data[1]) == 0x46 &&
+      GETJOCTET(data[2]) == 0x58 &&
+      GETJOCTET(data[3]) == 0x58 &&
+      GETJOCTET(data[4]) == 0) {
+    /* Found JFIF "JFXX" extension APP0 marker */
+    /* The library doesn't actually do anything with these,
+     * but we try to produce a helpful trace message.
+     */
+    switch (GETJOCTET(data[5])) {
+    case 0x10:
+      TRACEMS1(cinfo, 1, JTRC_THUMB_JPEG, (int) totallen);
+      break;
+    case 0x11:
+      TRACEMS1(cinfo, 1, JTRC_THUMB_PALETTE, (int) totallen);
+      break;
+    case 0x13:
+      TRACEMS1(cinfo, 1, JTRC_THUMB_RGB, (int) totallen);
+      break;
+    default:
+      TRACEMS2(cinfo, 1, JTRC_JFIF_EXTENSION,
+	       GETJOCTET(data[5]), (int) totallen);
+      break;
+    }
+  } else {
+    /* Start of APP0 does not match "JFIF" or "JFXX", or too short */
+    TRACEMS1(cinfo, 1, JTRC_APP0, (int) totallen);
+  }
+}
+
+
+LOCAL(void)
+examine_app14 (j_decompress_ptr cinfo, JOCTET FAR * data,
+	       unsigned int datalen, INT32 remaining)
+/* Examine first few bytes from an APP14.
+ * Take appropriate action if it is an Adobe marker.
+ * datalen is # of bytes at data[], remaining is length of rest of marker data.
+ */
+{
+  unsigned int version, flags0, flags1, transform;
+
+  if (datalen >= APP14_DATA_LEN &&
+      GETJOCTET(data[0]) == 0x41 &&
+      GETJOCTET(data[1]) == 0x64 &&
+      GETJOCTET(data[2]) == 0x6F &&
+      GETJOCTET(data[3]) == 0x62 &&
+      GETJOCTET(data[4]) == 0x65) {
+    /* Found Adobe APP14 marker */
+    version = (GETJOCTET(data[5]) << 8) + GETJOCTET(data[6]);
+    flags0 = (GETJOCTET(data[7]) << 8) + GETJOCTET(data[8]);
+    flags1 = (GETJOCTET(data[9]) << 8) + GETJOCTET(data[10]);
+    transform = GETJOCTET(data[11]);
+    TRACEMS4(cinfo, 1, JTRC_ADOBE, version, flags0, flags1, transform);
+    cinfo->saw_Adobe_marker = TRUE;
+    cinfo->Adobe_transform = (UINT8) transform;
+  } else {
+    /* Start of APP14 does not match "Adobe", or too short */
+    TRACEMS1(cinfo, 1, JTRC_APP14, (int) (datalen + remaining));
+  }
+}
+
+
+METHODDEF(boolean)
+get_interesting_appn (j_decompress_ptr cinfo)
+/* Process an APP0 or APP14 marker without saving it */
+{
+  INT32 length;
+  JOCTET b[APPN_DATA_LEN];
+  unsigned int i, numtoread;
+  INPUT_VARS(cinfo);
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+  length -= 2;
+
+  /* get the interesting part of the marker data */
+  if (length >= APPN_DATA_LEN)
+    numtoread = APPN_DATA_LEN;
+  else if (length > 0)
+    numtoread = (unsigned int) length;
+  else
+    numtoread = 0;
+  for (i = 0; i < numtoread; i++)
+    INPUT_BYTE(cinfo, b[i], return FALSE);
+  length -= numtoread;
+
+  /* process it */
+  switch (cinfo->unread_marker) {
+  case M_APP0:
+    examine_app0(cinfo, (JOCTET FAR *) b, numtoread, length);
+    break;
+  case M_APP14:
+    examine_app14(cinfo, (JOCTET FAR *) b, numtoread, length);
+    break;
+  default:
+    /* can't get here unless jpeg_save_markers chooses wrong processor */
+    ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker);
+    break;
+  }
+
+  /* skip any remaining data -- could be lots */
+  INPUT_SYNC(cinfo);
+  if (length > 0)
+    (*cinfo->src->skip_input_data) (cinfo, (long) length);
+
+  return TRUE;
+}
+
+
+#ifdef SAVE_MARKERS_SUPPORTED
+
+METHODDEF(boolean)
+save_marker (j_decompress_ptr cinfo)
+/* Save an APPn or COM marker into the marker list */
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+  jpeg_saved_marker_ptr cur_marker = marker->cur_marker;
+  unsigned int bytes_read, data_length;
+  JOCTET FAR * data;
+  INT32 length = 0;
+  INPUT_VARS(cinfo);
+
+  if (cur_marker == NULL) {
+    /* begin reading a marker */
+    INPUT_2BYTES(cinfo, length, return FALSE);
+    length -= 2;
+    if (length >= 0) {		/* watch out for bogus length word */
+      /* figure out how much we want to save */
+      unsigned int limit;
+      if (cinfo->unread_marker == (int) M_COM)
+	limit = marker->length_limit_COM;
+      else
+	limit = marker->length_limit_APPn[cinfo->unread_marker - (int) M_APP0];
+      if ((unsigned int) length < limit)
+	limit = (unsigned int) length;
+      /* allocate and initialize the marker item */
+      cur_marker = (jpeg_saved_marker_ptr)
+	(*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				    SIZEOF(struct jpeg_marker_struct) + limit);
+      cur_marker->next = NULL;
+      cur_marker->marker = (UINT8) cinfo->unread_marker;
+      cur_marker->original_length = (unsigned int) length;
+      cur_marker->data_length = limit;
+      /* data area is just beyond the jpeg_marker_struct */
+      data = cur_marker->data = (JOCTET FAR *) (cur_marker + 1);
+      marker->cur_marker = cur_marker;
+      marker->bytes_read = 0;
+      bytes_read = 0;
+      data_length = limit;
+    } else {
+      /* deal with bogus length word */
+      bytes_read = data_length = 0;
+      data = NULL;
+    }
+  } else {
+    /* resume reading a marker */
+    bytes_read = marker->bytes_read;
+    data_length = cur_marker->data_length;
+    data = cur_marker->data + bytes_read;
+  }
+
+  while (bytes_read < data_length) {
+    INPUT_SYNC(cinfo);		/* move the restart point to here */
+    marker->bytes_read = bytes_read;
+    /* If there's not at least one byte in buffer, suspend */
+    MAKE_BYTE_AVAIL(cinfo, return FALSE);
+    /* Copy bytes with reasonable rapidity */
+    while (bytes_read < data_length && bytes_in_buffer > 0) {
+      *data++ = *next_input_byte++;
+      bytes_in_buffer--;
+      bytes_read++;
+    }
+  }
+
+  /* Done reading what we want to read */
+  if (cur_marker != NULL) {	/* will be NULL if bogus length word */
+    /* Add new marker to end of list */
+    if (cinfo->marker_list == NULL) {
+      cinfo->marker_list = cur_marker;
+    } else {
+      jpeg_saved_marker_ptr prev = cinfo->marker_list;
+      while (prev->next != NULL)
+	prev = prev->next;
+      prev->next = cur_marker;
+    }
+    /* Reset pointer & calc remaining data length */
+    data = cur_marker->data;
+    length = cur_marker->original_length - data_length;
+  }
+  /* Reset to initial state for next marker */
+  marker->cur_marker = NULL;
+
+  /* Process the marker if interesting; else just make a generic trace msg */
+  switch (cinfo->unread_marker) {
+  case M_APP0:
+    examine_app0(cinfo, data, data_length, length);
+    break;
+  case M_APP14:
+    examine_app14(cinfo, data, data_length, length);
+    break;
+  default:
+    TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker,
+	     (int) (data_length + length));
+    break;
+  }
+
+  /* skip any remaining data -- could be lots */
+  INPUT_SYNC(cinfo);		/* do before skip_input_data */
+  if (length > 0)
+    (*cinfo->src->skip_input_data) (cinfo, (long) length);
+
+  return TRUE;
+}
+
+#endif /* SAVE_MARKERS_SUPPORTED */
+
+
+METHODDEF(boolean)
+skip_variable (j_decompress_ptr cinfo)
+/* Skip over an unknown or uninteresting variable-length marker */
+{
+  INT32 length;
+  INPUT_VARS(cinfo);
+
+  INPUT_2BYTES(cinfo, length, return FALSE);
+  length -= 2;
+  
+  TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker, (int) length);
+
+  INPUT_SYNC(cinfo);		/* do before skip_input_data */
+  if (length > 0)
+    (*cinfo->src->skip_input_data) (cinfo, (long) length);
+
+  return TRUE;
+}
+
+
+/*
+ * Find the next JPEG marker, save it in cinfo->unread_marker.
+ * Returns FALSE if had to suspend before reaching a marker;
+ * in that case cinfo->unread_marker is unchanged.
+ *
+ * Note that the result might not be a valid marker code,
+ * but it will never be 0 or FF.
+ */
+
+LOCAL(boolean)
+next_marker (j_decompress_ptr cinfo)
+{
+  int c;
+  INPUT_VARS(cinfo);
+
+  for (;;) {
+    INPUT_BYTE(cinfo, c, return FALSE);
+    /* Skip any non-FF bytes.
+     * This may look a bit inefficient, but it will not occur in a valid file.
+     * We sync after each discarded byte so that a suspending data source
+     * can discard the byte from its buffer.
+     */
+    while (c != 0xFF) {
+      cinfo->marker->discarded_bytes++;
+      INPUT_SYNC(cinfo);
+      INPUT_BYTE(cinfo, c, return FALSE);
+    }
+    /* This loop swallows any duplicate FF bytes.  Extra FFs are legal as
+     * pad bytes, so don't count them in discarded_bytes.  We assume there
+     * will not be so many consecutive FF bytes as to overflow a suspending
+     * data source's input buffer.
+     */
+    do {
+      INPUT_BYTE(cinfo, c, return FALSE);
+    } while (c == 0xFF);
+    if (c != 0)
+      break;			/* found a valid marker, exit loop */
+    /* Reach here if we found a stuffed-zero data sequence (FF/00).
+     * Discard it and loop back to try again.
+     */
+    cinfo->marker->discarded_bytes += 2;
+    INPUT_SYNC(cinfo);
+  }
+
+  if (cinfo->marker->discarded_bytes != 0) {
+    WARNMS2(cinfo, JWRN_EXTRANEOUS_DATA, cinfo->marker->discarded_bytes, c);
+    cinfo->marker->discarded_bytes = 0;
+  }
+
+  cinfo->unread_marker = c;
+
+  INPUT_SYNC(cinfo);
+  return TRUE;
+}
+
+
+LOCAL(boolean)
+first_marker (j_decompress_ptr cinfo)
+/* Like next_marker, but used to obtain the initial SOI marker. */
+/* For this marker, we do not allow preceding garbage or fill; otherwise,
+ * we might well scan an entire input file before realizing it ain't JPEG.
+ * If an application wants to process non-JFIF files, it must seek to the
+ * SOI before calling the JPEG library.
+ */
+{
+  int c, c2;
+  INPUT_VARS(cinfo);
+
+  INPUT_BYTE(cinfo, c, return FALSE);
+  INPUT_BYTE(cinfo, c2, return FALSE);
+  if (c != 0xFF || c2 != (int) M_SOI)
+    ERREXIT2(cinfo, JERR_NO_SOI, c, c2);
+
+  cinfo->unread_marker = c2;
+
+  INPUT_SYNC(cinfo);
+  return TRUE;
+}
+
+
+/*
+ * Read markers until SOS or EOI.
+ *
+ * Returns same codes as are defined for jpeg_consume_input:
+ * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
+ */
+
+METHODDEF(int)
+read_markers (j_decompress_ptr cinfo)
+{
+  /* Outer loop repeats once for each marker. */
+  for (;;) {
+    /* Collect the marker proper, unless we already did. */
+    /* NB: first_marker() enforces the requirement that SOI appear first. */
+    if (cinfo->unread_marker == 0) {
+      if (! cinfo->marker->saw_SOI) {
+	if (! first_marker(cinfo))
+	  return JPEG_SUSPENDED;
+      } else {
+	if (! next_marker(cinfo))
+	  return JPEG_SUSPENDED;
+      }
+    }
+    /* At this point cinfo->unread_marker contains the marker code and the
+     * input point is just past the marker proper, but before any parameters.
+     * A suspension will cause us to return with this state still true.
+     */
+    switch (cinfo->unread_marker) {
+    case M_SOI:
+      if (! get_soi(cinfo))
+	return JPEG_SUSPENDED;
+      break;
+
+    case M_SOF0:		/* Baseline */
+    case M_SOF1:		/* Extended sequential, Huffman */
+      if (! get_sof(cinfo, FALSE, FALSE))
+	return JPEG_SUSPENDED;
+      break;
+
+    case M_SOF2:		/* Progressive, Huffman */
+      if (! get_sof(cinfo, TRUE, FALSE))
+	return JPEG_SUSPENDED;
+      break;
+
+    case M_SOF9:		/* Extended sequential, arithmetic */
+      if (! get_sof(cinfo, FALSE, TRUE))
+	return JPEG_SUSPENDED;
+      break;
+
+    case M_SOF10:		/* Progressive, arithmetic */
+      if (! get_sof(cinfo, TRUE, TRUE))
+	return JPEG_SUSPENDED;
+      break;
+
+    /* Currently unsupported SOFn types */
+    case M_SOF3:		/* Lossless, Huffman */
+    case M_SOF5:		/* Differential sequential, Huffman */
+    case M_SOF6:		/* Differential progressive, Huffman */
+    case M_SOF7:		/* Differential lossless, Huffman */
+    case M_JPG:			/* Reserved for JPEG extensions */
+    case M_SOF11:		/* Lossless, arithmetic */
+    case M_SOF13:		/* Differential sequential, arithmetic */
+    case M_SOF14:		/* Differential progressive, arithmetic */
+    case M_SOF15:		/* Differential lossless, arithmetic */
+      ERREXIT1(cinfo, JERR_SOF_UNSUPPORTED, cinfo->unread_marker);
+      break;
+
+    case M_SOS:
+      if (! get_sos(cinfo))
+	return JPEG_SUSPENDED;
+      cinfo->unread_marker = 0;	/* processed the marker */
+      return JPEG_REACHED_SOS;
+    
+    case M_EOI:
+      TRACEMS(cinfo, 1, JTRC_EOI);
+      cinfo->unread_marker = 0;	/* processed the marker */
+      return JPEG_REACHED_EOI;
+      
+    case M_DAC:
+      if (! get_dac(cinfo))
+	return JPEG_SUSPENDED;
+      break;
+      
+    case M_DHT:
+      if (! get_dht(cinfo))
+	return JPEG_SUSPENDED;
+      break;
+      
+    case M_DQT:
+      if (! get_dqt(cinfo))
+	return JPEG_SUSPENDED;
+      break;
+      
+    case M_DRI:
+      if (! get_dri(cinfo))
+	return JPEG_SUSPENDED;
+      break;
+      
+    case M_APP0:
+    case M_APP1:
+    case M_APP2:
+    case M_APP3:
+    case M_APP4:
+    case M_APP5:
+    case M_APP6:
+    case M_APP7:
+    case M_APP8:
+    case M_APP9:
+    case M_APP10:
+    case M_APP11:
+    case M_APP12:
+    case M_APP13:
+    case M_APP14:
+    case M_APP15:
+      if (! (*((my_marker_ptr) cinfo->marker)->process_APPn[
+		cinfo->unread_marker - (int) M_APP0]) (cinfo))
+	return JPEG_SUSPENDED;
+      break;
+      
+    case M_COM:
+      if (! (*((my_marker_ptr) cinfo->marker)->process_COM) (cinfo))
+	return JPEG_SUSPENDED;
+      break;
+
+    case M_RST0:		/* these are all parameterless */
+    case M_RST1:
+    case M_RST2:
+    case M_RST3:
+    case M_RST4:
+    case M_RST5:
+    case M_RST6:
+    case M_RST7:
+    case M_TEM:
+      TRACEMS1(cinfo, 1, JTRC_PARMLESS_MARKER, cinfo->unread_marker);
+      break;
+
+    case M_DNL:			/* Ignore DNL ... perhaps the wrong thing */
+      if (! skip_variable(cinfo))
+	return JPEG_SUSPENDED;
+      break;
+
+    default:			/* must be DHP, EXP, JPGn, or RESn */
+      /* For now, we treat the reserved markers as fatal errors since they are
+       * likely to be used to signal incompatible JPEG Part 3 extensions.
+       * Once the JPEG 3 version-number marker is well defined, this code
+       * ought to change!
+       */
+      ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker);
+      break;
+    }
+    /* Successfully processed marker, so reset state variable */
+    cinfo->unread_marker = 0;
+  } /* end loop */
+}
+
+
+/*
+ * Read a restart marker, which is expected to appear next in the datastream;
+ * if the marker is not there, take appropriate recovery action.
+ * Returns FALSE if suspension is required.
+ *
+ * This is called by the entropy decoder after it has read an appropriate
+ * number of MCUs.  cinfo->unread_marker may be nonzero if the entropy decoder
+ * has already read a marker from the data source.  Under normal conditions
+ * cinfo->unread_marker will be reset to 0 before returning; if not reset,
+ * it holds a marker which the decoder will be unable to read past.
+ */
+
+METHODDEF(boolean)
+read_restart_marker (j_decompress_ptr cinfo)
+{
+  /* Obtain a marker unless we already did. */
+  /* Note that next_marker will complain if it skips any data. */
+  if (cinfo->unread_marker == 0) {
+    if (! next_marker(cinfo))
+      return FALSE;
+  }
+
+  if (cinfo->unread_marker ==
+      ((int) M_RST0 + cinfo->marker->next_restart_num)) {
+    /* Normal case --- swallow the marker and let entropy decoder continue */
+    TRACEMS1(cinfo, 3, JTRC_RST, cinfo->marker->next_restart_num);
+    cinfo->unread_marker = 0;
+  } else {
+    /* Uh-oh, the restart markers have been messed up. */
+    /* Let the data source manager determine how to resync. */
+    if (! (*cinfo->src->resync_to_restart) (cinfo,
+					    cinfo->marker->next_restart_num))
+      return FALSE;
+  }
+
+  /* Update next-restart state */
+  cinfo->marker->next_restart_num = (cinfo->marker->next_restart_num + 1) & 7;
+
+  return TRUE;
+}
+
+
+/*
+ * This is the default resync_to_restart method for data source managers
+ * to use if they don't have any better approach.  Some data source managers
+ * may be able to back up, or may have additional knowledge about the data
+ * which permits a more intelligent recovery strategy; such managers would
+ * presumably supply their own resync method.
+ *
+ * read_restart_marker calls resync_to_restart if it finds a marker other than
+ * the restart marker it was expecting.  (This code is *not* used unless
+ * a nonzero restart interval has been declared.)  cinfo->unread_marker is
+ * the marker code actually found (might be anything, except 0 or FF).
+ * The desired restart marker number (0..7) is passed as a parameter.
+ * This routine is supposed to apply whatever error recovery strategy seems
+ * appropriate in order to position the input stream to the next data segment.
+ * Note that cinfo->unread_marker is treated as a marker appearing before
+ * the current data-source input point; usually it should be reset to zero
+ * before returning.
+ * Returns FALSE if suspension is required.
+ *
+ * This implementation is substantially constrained by wanting to treat the
+ * input as a data stream; this means we can't back up.  Therefore, we have
+ * only the following actions to work with:
+ *   1. Simply discard the marker and let the entropy decoder resume at next
+ *      byte of file.
+ *   2. Read forward until we find another marker, discarding intervening
+ *      data.  (In theory we could look ahead within the current bufferload,
+ *      without having to discard data if we don't find the desired marker.
+ *      This idea is not implemented here, in part because it makes behavior
+ *      dependent on buffer size and chance buffer-boundary positions.)
+ *   3. Leave the marker unread (by failing to zero cinfo->unread_marker).
+ *      This will cause the entropy decoder to process an empty data segment,
+ *      inserting dummy zeroes, and then we will reprocess the marker.
+ *
+ * #2 is appropriate if we think the desired marker lies ahead, while #3 is
+ * appropriate if the found marker is a future restart marker (indicating
+ * that we have missed the desired restart marker, probably because it got
+ * corrupted).
+ * We apply #2 or #3 if the found marker is a restart marker no more than
+ * two counts behind or ahead of the expected one.  We also apply #2 if the
+ * found marker is not a legal JPEG marker code (it's certainly bogus data).
+ * If the found marker is a restart marker more than 2 counts away, we do #1
+ * (too much risk that the marker is erroneous; with luck we will be able to
+ * resync at some future point).
+ * For any valid non-restart JPEG marker, we apply #3.  This keeps us from
+ * overrunning the end of a scan.  An implementation limited to single-scan
+ * files might find it better to apply #2 for markers other than EOI, since
+ * any other marker would have to be bogus data in that case.
+ */
+
+GLOBAL(boolean)
+jpeg_resync_to_restart (j_decompress_ptr cinfo, int desired)
+{
+  int marker = cinfo->unread_marker;
+  int action = 1;
+  
+  /* Always put up a warning. */
+  WARNMS2(cinfo, JWRN_MUST_RESYNC, marker, desired);
+  
+  /* Outer loop handles repeated decision after scanning forward. */
+  for (;;) {
+    if (marker < (int) M_SOF0)
+      action = 2;		/* invalid marker */
+    else if (marker < (int) M_RST0 || marker > (int) M_RST7)
+      action = 3;		/* valid non-restart marker */
+    else {
+      if (marker == ((int) M_RST0 + ((desired+1) & 7)) ||
+	  marker == ((int) M_RST0 + ((desired+2) & 7)))
+	action = 3;		/* one of the next two expected restarts */
+      else if (marker == ((int) M_RST0 + ((desired-1) & 7)) ||
+	       marker == ((int) M_RST0 + ((desired-2) & 7)))
+	action = 2;		/* a prior restart, so advance */
+      else
+	action = 1;		/* desired restart or too far away */
+    }
+    TRACEMS2(cinfo, 4, JTRC_RECOVERY_ACTION, marker, action);
+    switch (action) {
+    case 1:
+      /* Discard marker and let entropy decoder resume processing. */
+      cinfo->unread_marker = 0;
+      return TRUE;
+    case 2:
+      /* Scan to the next marker, and repeat the decision loop. */
+      if (! next_marker(cinfo))
+	return FALSE;
+      marker = cinfo->unread_marker;
+      break;
+    case 3:
+      /* Return without advancing past this marker. */
+      /* Entropy decoder will be forced to process an empty segment. */
+      return TRUE;
+    }
+  } /* end loop */
+}
+
+
+/*
+ * Reset marker processing state to begin a fresh datastream.
+ */
+
+METHODDEF(void)
+reset_marker_reader (j_decompress_ptr cinfo)
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+
+  cinfo->comp_info = NULL;		/* until allocated by get_sof */
+  cinfo->input_scan_number = 0;		/* no SOS seen yet */
+  cinfo->unread_marker = 0;		/* no pending marker */
+  marker->pub.saw_SOI = FALSE;		/* set internal state too */
+  marker->pub.saw_SOF = FALSE;
+  marker->pub.discarded_bytes = 0;
+  marker->cur_marker = NULL;
+}
+
+
+/*
+ * Initialize the marker reader module.
+ * This is called only once, when the decompression object is created.
+ */
+
+GLOBAL(void)
+jinit_marker_reader (j_decompress_ptr cinfo)
+{
+  my_marker_ptr marker;
+  int i;
+
+  /* Create subobject in permanent pool */
+  marker = (my_marker_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
+				SIZEOF(my_marker_reader));
+  cinfo->marker = (struct jpeg_marker_reader *) marker;
+  /* Initialize public method pointers */
+  marker->pub.reset_marker_reader = reset_marker_reader;
+  marker->pub.read_markers = read_markers;
+  marker->pub.read_restart_marker = read_restart_marker;
+  /* Initialize COM/APPn processing.
+   * By default, we examine and then discard APP0 and APP14,
+   * but simply discard COM and all other APPn.
+   */
+  marker->process_COM = skip_variable;
+  marker->length_limit_COM = 0;
+  for (i = 0; i < 16; i++) {
+    marker->process_APPn[i] = skip_variable;
+    marker->length_limit_APPn[i] = 0;
+  }
+  marker->process_APPn[0] = get_interesting_appn;
+  marker->process_APPn[14] = get_interesting_appn;
+  /* Reset marker processing state */
+  reset_marker_reader(cinfo);
+}
+
+
+/*
+ * Control saving of COM and APPn markers into marker_list.
+ */
+
+#ifdef SAVE_MARKERS_SUPPORTED
+
+GLOBAL(void)
+jpeg_save_markers (j_decompress_ptr cinfo, int marker_code,
+		   unsigned int length_limit)
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+  long maxlength;
+  jpeg_marker_parser_method processor;
+
+  /* Length limit mustn't be larger than what we can allocate
+   * (should only be a concern in a 16-bit environment).
+   */
+  maxlength = cinfo->mem->max_alloc_chunk - SIZEOF(struct jpeg_marker_struct);
+  if (((long) length_limit) > maxlength)
+    length_limit = (unsigned int) maxlength;
+
+  /* Choose processor routine to use.
+   * APP0/APP14 have special requirements.
+   */
+  if (length_limit) {
+    processor = save_marker;
+    /* If saving APP0/APP14, save at least enough for our internal use. */
+    if (marker_code == (int) M_APP0 && length_limit < APP0_DATA_LEN)
+      length_limit = APP0_DATA_LEN;
+    else if (marker_code == (int) M_APP14 && length_limit < APP14_DATA_LEN)
+      length_limit = APP14_DATA_LEN;
+  } else {
+    processor = skip_variable;
+    /* If discarding APP0/APP14, use our regular on-the-fly processor. */
+    if (marker_code == (int) M_APP0 || marker_code == (int) M_APP14)
+      processor = get_interesting_appn;
+  }
+
+  if (marker_code == (int) M_COM) {
+    marker->process_COM = processor;
+    marker->length_limit_COM = length_limit;
+  } else if (marker_code >= (int) M_APP0 && marker_code <= (int) M_APP15) {
+    marker->process_APPn[marker_code - (int) M_APP0] = processor;
+    marker->length_limit_APPn[marker_code - (int) M_APP0] = length_limit;
+  } else
+    ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code);
+}
+
+#endif /* SAVE_MARKERS_SUPPORTED */
+
+
+/*
+ * Install a special processing method for COM or APPn markers.
+ */
+
+GLOBAL(void)
+jpeg_set_marker_processor (j_decompress_ptr cinfo, int marker_code,
+			   jpeg_marker_parser_method routine)
+{
+  my_marker_ptr marker = (my_marker_ptr) cinfo->marker;
+
+  if (marker_code == (int) M_COM)
+    marker->process_COM = routine;
+  else if (marker_code >= (int) M_APP0 && marker_code <= (int) M_APP15)
+    marker->process_APPn[marker_code - (int) M_APP0] = routine;
+  else
+    ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code);
+}
diff --git a/common/jpeg/jdmaster.c b/common/jpeg/jdmaster.c
new file mode 100644
index 00000000..2802c5b7
--- /dev/null
+++ b/common/jpeg/jdmaster.c
@@ -0,0 +1,557 @@
+/*
+ * jdmaster.c
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains master control logic for the JPEG decompressor.
+ * These routines are concerned with selecting the modules to be executed
+ * and with determining the number of passes and the work to be done in each
+ * pass.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Private state */
+
+typedef struct {
+  struct jpeg_decomp_master pub; /* public fields */
+
+  int pass_number;		/* # of passes completed */
+
+  boolean using_merged_upsample; /* TRUE if using merged upsample/cconvert */
+
+  /* Saved references to initialized quantizer modules,
+   * in case we need to switch modes.
+   */
+  struct jpeg_color_quantizer * quantizer_1pass;
+  struct jpeg_color_quantizer * quantizer_2pass;
+} my_decomp_master;
+
+typedef my_decomp_master * my_master_ptr;
+
+
+/*
+ * Determine whether merged upsample/color conversion should be used.
+ * CRUCIAL: this must match the actual capabilities of jdmerge.c!
+ */
+
+LOCAL(boolean)
+use_merged_upsample (j_decompress_ptr cinfo)
+{
+#ifdef UPSAMPLE_MERGING_SUPPORTED
+  /* Merging is the equivalent of plain box-filter upsampling */
+  if (cinfo->do_fancy_upsampling || cinfo->CCIR601_sampling)
+    return FALSE;
+  /* jdmerge.c only supports YCC=>RGB color conversion */
+  if (cinfo->jpeg_color_space != JCS_YCbCr || cinfo->num_components != 3 ||
+      cinfo->out_color_space != JCS_RGB ||
+      cinfo->out_color_components != RGB_PIXELSIZE)
+    return FALSE;
+  /* and it only handles 2h1v or 2h2v sampling ratios */
+  if (cinfo->comp_info[0].h_samp_factor != 2 ||
+      cinfo->comp_info[1].h_samp_factor != 1 ||
+      cinfo->comp_info[2].h_samp_factor != 1 ||
+      cinfo->comp_info[0].v_samp_factor >  2 ||
+      cinfo->comp_info[1].v_samp_factor != 1 ||
+      cinfo->comp_info[2].v_samp_factor != 1)
+    return FALSE;
+  /* furthermore, it doesn't work if we've scaled the IDCTs differently */
+  if (cinfo->comp_info[0].DCT_scaled_size != cinfo->min_DCT_scaled_size ||
+      cinfo->comp_info[1].DCT_scaled_size != cinfo->min_DCT_scaled_size ||
+      cinfo->comp_info[2].DCT_scaled_size != cinfo->min_DCT_scaled_size)
+    return FALSE;
+  /* ??? also need to test for upsample-time rescaling, when & if supported */
+  return TRUE;			/* by golly, it'll work... */
+#else
+  return FALSE;
+#endif
+}
+
+
+/*
+ * Compute output image dimensions and related values.
+ * NOTE: this is exported for possible use by application.
+ * Hence it mustn't do anything that can't be done twice.
+ * Also note that it may be called before the master module is initialized!
+ */
+
+GLOBAL(void)
+jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
+/* Do computations that are needed before master selection phase */
+{
+#ifdef IDCT_SCALING_SUPPORTED
+  int ci;
+  jpeg_component_info *compptr;
+#endif
+
+  /* Prevent application from calling me at wrong times */
+  if (cinfo->global_state != DSTATE_READY)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+#ifdef IDCT_SCALING_SUPPORTED
+
+  /* Compute actual output image dimensions and DCT scaling choices. */
+  if (cinfo->scale_num * 8 <= cinfo->scale_denom) {
+    /* Provide 1/8 scaling */
+    cinfo->output_width = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width, 8L);
+    cinfo->output_height = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height, 8L);
+    cinfo->min_DCT_scaled_size = 1;
+  } else if (cinfo->scale_num * 4 <= cinfo->scale_denom) {
+    /* Provide 1/4 scaling */
+    cinfo->output_width = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width, 4L);
+    cinfo->output_height = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height, 4L);
+    cinfo->min_DCT_scaled_size = 2;
+  } else if (cinfo->scale_num * 2 <= cinfo->scale_denom) {
+    /* Provide 1/2 scaling */
+    cinfo->output_width = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width, 2L);
+    cinfo->output_height = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height, 2L);
+    cinfo->min_DCT_scaled_size = 4;
+  } else {
+    /* Provide 1/1 scaling */
+    cinfo->output_width = cinfo->image_width;
+    cinfo->output_height = cinfo->image_height;
+    cinfo->min_DCT_scaled_size = DCTSIZE;
+  }
+  /* In selecting the actual DCT scaling for each component, we try to
+   * scale up the chroma components via IDCT scaling rather than upsampling.
+   * This saves time if the upsampler gets to use 1:1 scaling.
+   * Note this code assumes that the supported DCT scalings are powers of 2.
+   */
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    int ssize = cinfo->min_DCT_scaled_size;
+    while (ssize < DCTSIZE &&
+	   (compptr->h_samp_factor * ssize * 2 <=
+	    cinfo->max_h_samp_factor * cinfo->min_DCT_scaled_size) &&
+	   (compptr->v_samp_factor * ssize * 2 <=
+	    cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size)) {
+      ssize = ssize * 2;
+    }
+    compptr->DCT_scaled_size = ssize;
+  }
+
+  /* Recompute downsampled dimensions of components;
+   * application needs to know these if using raw downsampled data.
+   */
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Size in samples, after IDCT scaling */
+    compptr->downsampled_width = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_width *
+		    (long) (compptr->h_samp_factor * compptr->DCT_scaled_size),
+		    (long) (cinfo->max_h_samp_factor * DCTSIZE));
+    compptr->downsampled_height = (JDIMENSION)
+      jdiv_round_up((long) cinfo->image_height *
+		    (long) (compptr->v_samp_factor * compptr->DCT_scaled_size),
+		    (long) (cinfo->max_v_samp_factor * DCTSIZE));
+  }
+
+#else /* !IDCT_SCALING_SUPPORTED */
+
+  /* Hardwire it to "no scaling" */
+  cinfo->output_width = cinfo->image_width;
+  cinfo->output_height = cinfo->image_height;
+  /* jdinput.c has already initialized DCT_scaled_size to DCTSIZE,
+   * and has computed unscaled downsampled_width and downsampled_height.
+   */
+
+#endif /* IDCT_SCALING_SUPPORTED */
+
+  /* Report number of components in selected colorspace. */
+  /* Probably this should be in the color conversion module... */
+  switch (cinfo->out_color_space) {
+  case JCS_GRAYSCALE:
+    cinfo->out_color_components = 1;
+    break;
+  case JCS_RGB:
+#if RGB_PIXELSIZE != 3
+    cinfo->out_color_components = RGB_PIXELSIZE;
+    break;
+#endif /* else share code with YCbCr */
+  case JCS_YCbCr:
+    cinfo->out_color_components = 3;
+    break;
+  case JCS_CMYK:
+  case JCS_YCCK:
+    cinfo->out_color_components = 4;
+    break;
+  default:			/* else must be same colorspace as in file */
+    cinfo->out_color_components = cinfo->num_components;
+    break;
+  }
+  cinfo->output_components = (cinfo->quantize_colors ? 1 :
+			      cinfo->out_color_components);
+
+  /* See if upsampler will want to emit more than one row at a time */
+  if (use_merged_upsample(cinfo))
+    cinfo->rec_outbuf_height = cinfo->max_v_samp_factor;
+  else
+    cinfo->rec_outbuf_height = 1;
+}
+
+
+/*
+ * Several decompression processes need to range-limit values to the range
+ * 0..MAXJSAMPLE; the input value may fall somewhat outside this range
+ * due to noise introduced by quantization, roundoff error, etc.  These
+ * processes are inner loops and need to be as fast as possible.  On most
+ * machines, particularly CPUs with pipelines or instruction prefetch,
+ * a (subscript-check-less) C table lookup
+ *		x = sample_range_limit[x];
+ * is faster than explicit tests
+ *		if (x < 0)  x = 0;
+ *		else if (x > MAXJSAMPLE)  x = MAXJSAMPLE;
+ * These processes all use a common table prepared by the routine below.
+ *
+ * For most steps we can mathematically guarantee that the initial value
+ * of x is within MAXJSAMPLE+1 of the legal range, so a table running from
+ * -(MAXJSAMPLE+1) to 2*MAXJSAMPLE+1 is sufficient.  But for the initial
+ * limiting step (just after the IDCT), a wildly out-of-range value is 
+ * possible if the input data is corrupt.  To avoid any chance of indexing
+ * off the end of memory and getting a bad-pointer trap, we perform the
+ * post-IDCT limiting thus:
+ *		x = range_limit[x & MASK];
+ * where MASK is 2 bits wider than legal sample data, ie 10 bits for 8-bit
+ * samples.  Under normal circumstances this is more than enough range and
+ * a correct output will be generated; with bogus input data the mask will
+ * cause wraparound, and we will safely generate a bogus-but-in-range output.
+ * For the post-IDCT step, we want to convert the data from signed to unsigned
+ * representation by adding CENTERJSAMPLE at the same time that we limit it.
+ * So the post-IDCT limiting table ends up looking like this:
+ *   CENTERJSAMPLE,CENTERJSAMPLE+1,...,MAXJSAMPLE,
+ *   MAXJSAMPLE (repeat 2*(MAXJSAMPLE+1)-CENTERJSAMPLE times),
+ *   0          (repeat 2*(MAXJSAMPLE+1)-CENTERJSAMPLE times),
+ *   0,1,...,CENTERJSAMPLE-1
+ * Negative inputs select values from the upper half of the table after
+ * masking.
+ *
+ * We can save some space by overlapping the start of the post-IDCT table
+ * with the simpler range limiting table.  The post-IDCT table begins at
+ * sample_range_limit + CENTERJSAMPLE.
+ *
+ * Note that the table is allocated in near data space on PCs; it's small
+ * enough and used often enough to justify this.
+ */
+
+LOCAL(void)
+prepare_range_limit_table (j_decompress_ptr cinfo)
+/* Allocate and fill in the sample_range_limit table */
+{
+  JSAMPLE * table;
+  int i;
+
+  table = (JSAMPLE *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+		(5 * (MAXJSAMPLE+1) + CENTERJSAMPLE) * SIZEOF(JSAMPLE));
+  table += (MAXJSAMPLE+1);	/* allow negative subscripts of simple table */
+  cinfo->sample_range_limit = table;
+  /* First segment of "simple" table: limit[x] = 0 for x < 0 */
+  MEMZERO(table - (MAXJSAMPLE+1), (MAXJSAMPLE+1) * SIZEOF(JSAMPLE));
+  /* Main part of "simple" table: limit[x] = x */
+  for (i = 0; i <= MAXJSAMPLE; i++)
+    table[i] = (JSAMPLE) i;
+  table += CENTERJSAMPLE;	/* Point to where post-IDCT table starts */
+  /* End of simple table, rest of first half of post-IDCT table */
+  for (i = CENTERJSAMPLE; i < 2*(MAXJSAMPLE+1); i++)
+    table[i] = MAXJSAMPLE;
+  /* Second half of post-IDCT table */
+  MEMZERO(table + (2 * (MAXJSAMPLE+1)),
+	  (2 * (MAXJSAMPLE+1) - CENTERJSAMPLE) * SIZEOF(JSAMPLE));
+  MEMCOPY(table + (4 * (MAXJSAMPLE+1) - CENTERJSAMPLE),
+	  cinfo->sample_range_limit, CENTERJSAMPLE * SIZEOF(JSAMPLE));
+}
+
+
+/*
+ * Master selection of decompression modules.
+ * This is done once at jpeg_start_decompress time.  We determine
+ * which modules will be used and give them appropriate initialization calls.
+ * We also initialize the decompressor input side to begin consuming data.
+ *
+ * Since jpeg_read_header has finished, we know what is in the SOF
+ * and (first) SOS markers.  We also have all the application parameter
+ * settings.
+ */
+
+LOCAL(void)
+master_selection (j_decompress_ptr cinfo)
+{
+  my_master_ptr master = (my_master_ptr) cinfo->master;
+  boolean use_c_buffer;
+  long samplesperrow;
+  JDIMENSION jd_samplesperrow;
+
+  /* Initialize dimensions and other stuff */
+  jpeg_calc_output_dimensions(cinfo);
+  prepare_range_limit_table(cinfo);
+
+  /* Width of an output scanline must be representable as JDIMENSION. */
+  samplesperrow = (long) cinfo->output_width * (long) cinfo->out_color_components;
+  jd_samplesperrow = (JDIMENSION) samplesperrow;
+  if ((long) jd_samplesperrow != samplesperrow)
+    ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
+
+  /* Initialize my private state */
+  master->pass_number = 0;
+  master->using_merged_upsample = use_merged_upsample(cinfo);
+
+  /* Color quantizer selection */
+  master->quantizer_1pass = NULL;
+  master->quantizer_2pass = NULL;
+  /* No mode changes if not using buffered-image mode. */
+  if (! cinfo->quantize_colors || ! cinfo->buffered_image) {
+    cinfo->enable_1pass_quant = FALSE;
+    cinfo->enable_external_quant = FALSE;
+    cinfo->enable_2pass_quant = FALSE;
+  }
+  if (cinfo->quantize_colors) {
+    if (cinfo->raw_data_out)
+      ERREXIT(cinfo, JERR_NOTIMPL);
+    /* 2-pass quantizer only works in 3-component color space. */
+    if (cinfo->out_color_components != 3) {
+      cinfo->enable_1pass_quant = TRUE;
+      cinfo->enable_external_quant = FALSE;
+      cinfo->enable_2pass_quant = FALSE;
+      cinfo->colormap = NULL;
+    } else if (cinfo->colormap != NULL) {
+      cinfo->enable_external_quant = TRUE;
+    } else if (cinfo->two_pass_quantize) {
+      cinfo->enable_2pass_quant = TRUE;
+    } else {
+      cinfo->enable_1pass_quant = TRUE;
+    }
+
+    if (cinfo->enable_1pass_quant) {
+#ifdef QUANT_1PASS_SUPPORTED
+      jinit_1pass_quantizer(cinfo);
+      master->quantizer_1pass = cinfo->cquantize;
+#else
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+    }
+
+    /* We use the 2-pass code to map to external colormaps. */
+    if (cinfo->enable_2pass_quant || cinfo->enable_external_quant) {
+#ifdef QUANT_2PASS_SUPPORTED
+      jinit_2pass_quantizer(cinfo);
+      master->quantizer_2pass = cinfo->cquantize;
+#else
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+    }
+    /* If both quantizers are initialized, the 2-pass one is left active;
+     * this is necessary for starting with quantization to an external map.
+     */
+  }
+
+  /* Post-processing: in particular, color conversion first */
+  if (! cinfo->raw_data_out) {
+    if (master->using_merged_upsample) {
+#ifdef UPSAMPLE_MERGING_SUPPORTED
+      jinit_merged_upsampler(cinfo); /* does color conversion too */
+#else
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+    } else {
+      jinit_color_deconverter(cinfo);
+      jinit_upsampler(cinfo);
+    }
+    jinit_d_post_controller(cinfo, cinfo->enable_2pass_quant);
+  }
+  /* Inverse DCT */
+  jinit_inverse_dct(cinfo);
+  /* Entropy decoding: either Huffman or arithmetic coding. */
+  if (cinfo->arith_code) {
+    ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
+  } else {
+    if (cinfo->progressive_mode) {
+#ifdef D_PROGRESSIVE_SUPPORTED
+      jinit_phuff_decoder(cinfo);
+#else
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+    } else
+      jinit_huff_decoder(cinfo);
+  }
+
+  /* Initialize principal buffer controllers. */
+  use_c_buffer = cinfo->inputctl->has_multiple_scans || cinfo->buffered_image;
+  jinit_d_coef_controller(cinfo, use_c_buffer);
+
+  if (! cinfo->raw_data_out)
+    jinit_d_main_controller(cinfo, FALSE /* never need full buffer here */);
+
+  /* We can now tell the memory manager to allocate virtual arrays. */
+  (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
+
+  /* Initialize input side of decompressor to consume first scan. */
+  (*cinfo->inputctl->start_input_pass) (cinfo);
+
+#ifdef D_MULTISCAN_FILES_SUPPORTED
+  /* If jpeg_start_decompress will read the whole file, initialize
+   * progress monitoring appropriately.  The input step is counted
+   * as one pass.
+   */
+  if (cinfo->progress != NULL && ! cinfo->buffered_image &&
+      cinfo->inputctl->has_multiple_scans) {
+    int nscans;
+    /* Estimate number of scans to set pass_limit. */
+    if (cinfo->progressive_mode) {
+      /* Arbitrarily estimate 2 interleaved DC scans + 3 AC scans/component. */
+      nscans = 2 + 3 * cinfo->num_components;
+    } else {
+      /* For a nonprogressive multiscan file, estimate 1 scan per component. */
+      nscans = cinfo->num_components;
+    }
+    cinfo->progress->pass_counter = 0L;
+    cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows * nscans;
+    cinfo->progress->completed_passes = 0;
+    cinfo->progress->total_passes = (cinfo->enable_2pass_quant ? 3 : 2);
+    /* Count the input pass as done */
+    master->pass_number++;
+  }
+#endif /* D_MULTISCAN_FILES_SUPPORTED */
+}
+
+
+/*
+ * Per-pass setup.
+ * This is called at the beginning of each output pass.  We determine which
+ * modules will be active during this pass and give them appropriate
+ * start_pass calls.  We also set is_dummy_pass to indicate whether this
+ * is a "real" output pass or a dummy pass for color quantization.
+ * (In the latter case, jdapistd.c will crank the pass to completion.)
+ */
+
+METHODDEF(void)
+prepare_for_output_pass (j_decompress_ptr cinfo)
+{
+  my_master_ptr master = (my_master_ptr) cinfo->master;
+
+  if (master->pub.is_dummy_pass) {
+#ifdef QUANT_2PASS_SUPPORTED
+    /* Final pass of 2-pass quantization */
+    master->pub.is_dummy_pass = FALSE;
+    (*cinfo->cquantize->start_pass) (cinfo, FALSE);
+    (*cinfo->post->start_pass) (cinfo, JBUF_CRANK_DEST);
+    (*cinfo->main->start_pass) (cinfo, JBUF_CRANK_DEST);
+#else
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif /* QUANT_2PASS_SUPPORTED */
+  } else {
+    if (cinfo->quantize_colors && cinfo->colormap == NULL) {
+      /* Select new quantization method */
+      if (cinfo->two_pass_quantize && cinfo->enable_2pass_quant) {
+	cinfo->cquantize = master->quantizer_2pass;
+	master->pub.is_dummy_pass = TRUE;
+      } else if (cinfo->enable_1pass_quant) {
+	cinfo->cquantize = master->quantizer_1pass;
+      } else {
+	ERREXIT(cinfo, JERR_MODE_CHANGE);
+      }
+    }
+    (*cinfo->idct->start_pass) (cinfo);
+    (*cinfo->coef->start_output_pass) (cinfo);
+    if (! cinfo->raw_data_out) {
+      if (! master->using_merged_upsample)
+	(*cinfo->cconvert->start_pass) (cinfo);
+      (*cinfo->upsample->start_pass) (cinfo);
+      if (cinfo->quantize_colors)
+	(*cinfo->cquantize->start_pass) (cinfo, master->pub.is_dummy_pass);
+      (*cinfo->post->start_pass) (cinfo,
+	    (master->pub.is_dummy_pass ? JBUF_SAVE_AND_PASS : JBUF_PASS_THRU));
+      (*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU);
+    }
+  }
+
+  /* Set up progress monitor's pass info if present */
+  if (cinfo->progress != NULL) {
+    cinfo->progress->completed_passes = master->pass_number;
+    cinfo->progress->total_passes = master->pass_number +
+				    (master->pub.is_dummy_pass ? 2 : 1);
+    /* In buffered-image mode, we assume one more output pass if EOI not
+     * yet reached, but no more passes if EOI has been reached.
+     */
+    if (cinfo->buffered_image && ! cinfo->inputctl->eoi_reached) {
+      cinfo->progress->total_passes += (cinfo->enable_2pass_quant ? 2 : 1);
+    }
+  }
+}
+
+
+/*
+ * Finish up at end of an output pass.
+ */
+
+METHODDEF(void)
+finish_output_pass (j_decompress_ptr cinfo)
+{
+  my_master_ptr master = (my_master_ptr) cinfo->master;
+
+  if (cinfo->quantize_colors)
+    (*cinfo->cquantize->finish_pass) (cinfo);
+  master->pass_number++;
+}
+
+
+#ifdef D_MULTISCAN_FILES_SUPPORTED
+
+/*
+ * Switch to a new external colormap between output passes.
+ */
+
+GLOBAL(void)
+jpeg_new_colormap (j_decompress_ptr cinfo)
+{
+  my_master_ptr master = (my_master_ptr) cinfo->master;
+
+  /* Prevent application from calling me at wrong times */
+  if (cinfo->global_state != DSTATE_BUFIMAGE)
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+
+  if (cinfo->quantize_colors && cinfo->enable_external_quant &&
+      cinfo->colormap != NULL) {
+    /* Select 2-pass quantizer for external colormap use */
+    cinfo->cquantize = master->quantizer_2pass;
+    /* Notify quantizer of colormap change */
+    (*cinfo->cquantize->new_color_map) (cinfo);
+    master->pub.is_dummy_pass = FALSE; /* just in case */
+  } else
+    ERREXIT(cinfo, JERR_MODE_CHANGE);
+}
+
+#endif /* D_MULTISCAN_FILES_SUPPORTED */
+
+
+/*
+ * Initialize master decompression control and select active modules.
+ * This is performed at the start of jpeg_start_decompress.
+ */
+
+GLOBAL(void)
+jinit_master_decompress (j_decompress_ptr cinfo)
+{
+  my_master_ptr master;
+
+  master = (my_master_ptr)
+      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				  SIZEOF(my_decomp_master));
+  cinfo->master = (struct jpeg_decomp_master *) master;
+  master->pub.prepare_for_output_pass = prepare_for_output_pass;
+  master->pub.finish_output_pass = finish_output_pass;
+
+  master->pub.is_dummy_pass = FALSE;
+
+  master_selection(cinfo);
+}
diff --git a/common/jpeg/jdmerge.c b/common/jpeg/jdmerge.c
new file mode 100644
index 00000000..37444468
--- /dev/null
+++ b/common/jpeg/jdmerge.c
@@ -0,0 +1,400 @@
+/*
+ * jdmerge.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains code for merged upsampling/color conversion.
+ *
+ * This file combines functions from jdsample.c and jdcolor.c;
+ * read those files first to understand what's going on.
+ *
+ * When the chroma components are to be upsampled by simple replication
+ * (ie, box filtering), we can save some work in color conversion by
+ * calculating all the output pixels corresponding to a pair of chroma
+ * samples at one time.  In the conversion equations
+ *	R = Y           + K1 * Cr
+ *	G = Y + K2 * Cb + K3 * Cr
+ *	B = Y + K4 * Cb
+ * only the Y term varies among the group of pixels corresponding to a pair
+ * of chroma samples, so the rest of the terms can be calculated just once.
+ * At typical sampling ratios, this eliminates half or three-quarters of the
+ * multiplications needed for color conversion.
+ *
+ * This file currently provides implementations for the following cases:
+ *	YCbCr => RGB color conversion only.
+ *	Sampling ratios of 2h1v or 2h2v.
+ *	No scaling needed at upsample time.
+ *	Corner-aligned (non-CCIR601) sampling alignment.
+ * Other special cases could be added, but in most applications these are
+ * the only common cases.  (For uncommon cases we fall back on the more
+ * general code in jdsample.c and jdcolor.c.)
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+#ifdef UPSAMPLE_MERGING_SUPPORTED
+
+
+/* Private subobject */
+
+typedef struct {
+  struct jpeg_upsampler pub;	/* public fields */
+
+  /* Pointer to routine to do actual upsampling/conversion of one row group */
+  JMETHOD(void, upmethod, (j_decompress_ptr cinfo,
+			   JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
+			   JSAMPARRAY output_buf));
+
+  /* Private state for YCC->RGB conversion */
+  int * Cr_r_tab;		/* => table for Cr to R conversion */
+  int * Cb_b_tab;		/* => table for Cb to B conversion */
+  INT32 * Cr_g_tab;		/* => table for Cr to G conversion */
+  INT32 * Cb_g_tab;		/* => table for Cb to G conversion */
+
+  /* For 2:1 vertical sampling, we produce two output rows at a time.
+   * We need a "spare" row buffer to hold the second output row if the
+   * application provides just a one-row buffer; we also use the spare
+   * to discard the dummy last row if the image height is odd.
+   */
+  JSAMPROW spare_row;
+  boolean spare_full;		/* T if spare buffer is occupied */
+
+  JDIMENSION out_row_width;	/* samples per output row */
+  JDIMENSION rows_to_go;	/* counts rows remaining in image */
+} my_upsampler;
+
+typedef my_upsampler * my_upsample_ptr;
+
+#define SCALEBITS	16	/* speediest right-shift on some machines */
+#define ONE_HALF	((INT32) 1 << (SCALEBITS-1))
+#define FIX(x)		((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
+
+
+/*
+ * Initialize tables for YCC->RGB colorspace conversion.
+ * This is taken directly from jdcolor.c; see that file for more info.
+ */
+
+LOCAL(void)
+build_ycc_rgb_table (j_decompress_ptr cinfo)
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+  int i;
+  INT32 x;
+  SHIFT_TEMPS
+
+  upsample->Cr_r_tab = (int *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(MAXJSAMPLE+1) * SIZEOF(int));
+  upsample->Cb_b_tab = (int *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(MAXJSAMPLE+1) * SIZEOF(int));
+  upsample->Cr_g_tab = (INT32 *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(MAXJSAMPLE+1) * SIZEOF(INT32));
+  upsample->Cb_g_tab = (INT32 *)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				(MAXJSAMPLE+1) * SIZEOF(INT32));
+
+  for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
+    /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
+    /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
+    /* Cr=>R value is nearest int to 1.40200 * x */
+    upsample->Cr_r_tab[i] = (int)
+		    RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
+    /* Cb=>B value is nearest int to 1.77200 * x */
+    upsample->Cb_b_tab[i] = (int)
+		    RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
+    /* Cr=>G value is scaled-up -0.71414 * x */
+    upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x;
+    /* Cb=>G value is scaled-up -0.34414 * x */
+    /* We also add in ONE_HALF so that need not do it in inner loop */
+    upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF;
+  }
+}
+
+
+/*
+ * Initialize for an upsampling pass.
+ */
+
+METHODDEF(void)
+start_pass_merged_upsample (j_decompress_ptr cinfo)
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+
+  /* Mark the spare buffer empty */
+  upsample->spare_full = FALSE;
+  /* Initialize total-height counter for detecting bottom of image */
+  upsample->rows_to_go = cinfo->output_height;
+}
+
+
+/*
+ * Control routine to do upsampling (and color conversion).
+ *
+ * The control routine just handles the row buffering considerations.
+ */
+
+METHODDEF(void)
+merged_2v_upsample (j_decompress_ptr cinfo,
+		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+		    JDIMENSION in_row_groups_avail,
+		    JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+		    JDIMENSION out_rows_avail)
+/* 2:1 vertical sampling case: may need a spare row. */
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+  JSAMPROW work_ptrs[2];
+  JDIMENSION num_rows;		/* number of rows returned to caller */
+
+  if (upsample->spare_full) {
+    /* If we have a spare row saved from a previous cycle, just return it. */
+    jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0,
+		      1, upsample->out_row_width);
+    num_rows = 1;
+    upsample->spare_full = FALSE;
+  } else {
+    /* Figure number of rows to return to caller. */
+    num_rows = 2;
+    /* Not more than the distance to the end of the image. */
+    if (num_rows > upsample->rows_to_go)
+      num_rows = upsample->rows_to_go;
+    /* And not more than what the client can accept: */
+    out_rows_avail -= *out_row_ctr;
+    if (num_rows > out_rows_avail)
+      num_rows = out_rows_avail;
+    /* Create output pointer array for upsampler. */
+    work_ptrs[0] = output_buf[*out_row_ctr];
+    if (num_rows > 1) {
+      work_ptrs[1] = output_buf[*out_row_ctr + 1];
+    } else {
+      work_ptrs[1] = upsample->spare_row;
+      upsample->spare_full = TRUE;
+    }
+    /* Now do the upsampling. */
+    (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs);
+  }
+
+  /* Adjust counts */
+  *out_row_ctr += num_rows;
+  upsample->rows_to_go -= num_rows;
+  /* When the buffer is emptied, declare this input row group consumed */
+  if (! upsample->spare_full)
+    (*in_row_group_ctr)++;
+}
+
+
+METHODDEF(void)
+merged_1v_upsample (j_decompress_ptr cinfo,
+		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+		    JDIMENSION in_row_groups_avail,
+		    JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+		    JDIMENSION out_rows_avail)
+/* 1:1 vertical sampling case: much easier, never need a spare row. */
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+
+  /* Just do the upsampling. */
+  (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr,
+			 output_buf + *out_row_ctr);
+  /* Adjust counts */
+  (*out_row_ctr)++;
+  (*in_row_group_ctr)++;
+}
+
+
+/*
+ * These are the routines invoked by the control routines to do
+ * the actual upsampling/conversion.  One row group is processed per call.
+ *
+ * Note: since we may be writing directly into application-supplied buffers,
+ * we have to be honest about the output width; we can't assume the buffer
+ * has been rounded up to an even width.
+ */
+
+
+/*
+ * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
+ */
+
+METHODDEF(void)
+h2v1_merged_upsample (j_decompress_ptr cinfo,
+		      JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
+		      JSAMPARRAY output_buf)
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+  register int y, cred, cgreen, cblue;
+  int cb, cr;
+  register JSAMPROW outptr;
+  JSAMPROW inptr0, inptr1, inptr2;
+  JDIMENSION col;
+  /* copy these pointers into registers if possible */
+  register JSAMPLE * range_limit = cinfo->sample_range_limit;
+  int * Crrtab = upsample->Cr_r_tab;
+  int * Cbbtab = upsample->Cb_b_tab;
+  INT32 * Crgtab = upsample->Cr_g_tab;
+  INT32 * Cbgtab = upsample->Cb_g_tab;
+  SHIFT_TEMPS
+
+  inptr0 = input_buf[0][in_row_group_ctr];
+  inptr1 = input_buf[1][in_row_group_ctr];
+  inptr2 = input_buf[2][in_row_group_ctr];
+  outptr = output_buf[0];
+  /* Loop for each pair of output pixels */
+  for (col = cinfo->output_width >> 1; col > 0; col--) {
+    /* Do the chroma part of the calculation */
+    cb = GETJSAMPLE(*inptr1++);
+    cr = GETJSAMPLE(*inptr2++);
+    cred = Crrtab[cr];
+    cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
+    cblue = Cbbtab[cb];
+    /* Fetch 2 Y values and emit 2 pixels */
+    y  = GETJSAMPLE(*inptr0++);
+    outptr[RGB_RED] =   range_limit[y + cred];
+    outptr[RGB_GREEN] = range_limit[y + cgreen];
+    outptr[RGB_BLUE] =  range_limit[y + cblue];
+    outptr += RGB_PIXELSIZE;
+    y  = GETJSAMPLE(*inptr0++);
+    outptr[RGB_RED] =   range_limit[y + cred];
+    outptr[RGB_GREEN] = range_limit[y + cgreen];
+    outptr[RGB_BLUE] =  range_limit[y + cblue];
+    outptr += RGB_PIXELSIZE;
+  }
+  /* If image width is odd, do the last output column separately */
+  if (cinfo->output_width & 1) {
+    cb = GETJSAMPLE(*inptr1);
+    cr = GETJSAMPLE(*inptr2);
+    cred = Crrtab[cr];
+    cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
+    cblue = Cbbtab[cb];
+    y  = GETJSAMPLE(*inptr0);
+    outptr[RGB_RED] =   range_limit[y + cred];
+    outptr[RGB_GREEN] = range_limit[y + cgreen];
+    outptr[RGB_BLUE] =  range_limit[y + cblue];
+  }
+}
+
+
+/*
+ * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
+ */
+
+METHODDEF(void)
+h2v2_merged_upsample (j_decompress_ptr cinfo,
+		      JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
+		      JSAMPARRAY output_buf)
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+  register int y, cred, cgreen, cblue;
+  int cb, cr;
+  register JSAMPROW outptr0, outptr1;
+  JSAMPROW inptr00, inptr01, inptr1, inptr2;
+  JDIMENSION col;
+  /* copy these pointers into registers if possible */
+  register JSAMPLE * range_limit = cinfo->sample_range_limit;
+  int * Crrtab = upsample->Cr_r_tab;
+  int * Cbbtab = upsample->Cb_b_tab;
+  INT32 * Crgtab = upsample->Cr_g_tab;
+  INT32 * Cbgtab = upsample->Cb_g_tab;
+  SHIFT_TEMPS
+
+  inptr00 = input_buf[0][in_row_group_ctr*2];
+  inptr01 = input_buf[0][in_row_group_ctr*2 + 1];
+  inptr1 = input_buf[1][in_row_group_ctr];
+  inptr2 = input_buf[2][in_row_group_ctr];
+  outptr0 = output_buf[0];
+  outptr1 = output_buf[1];
+  /* Loop for each group of output pixels */
+  for (col = cinfo->output_width >> 1; col > 0; col--) {
+    /* Do the chroma part of the calculation */
+    cb = GETJSAMPLE(*inptr1++);
+    cr = GETJSAMPLE(*inptr2++);
+    cred = Crrtab[cr];
+    cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
+    cblue = Cbbtab[cb];
+    /* Fetch 4 Y values and emit 4 pixels */
+    y  = GETJSAMPLE(*inptr00++);
+    outptr0[RGB_RED] =   range_limit[y + cred];
+    outptr0[RGB_GREEN] = range_limit[y + cgreen];
+    outptr0[RGB_BLUE] =  range_limit[y + cblue];
+    outptr0 += RGB_PIXELSIZE;
+    y  = GETJSAMPLE(*inptr00++);
+    outptr0[RGB_RED] =   range_limit[y + cred];
+    outptr0[RGB_GREEN] = range_limit[y + cgreen];
+    outptr0[RGB_BLUE] =  range_limit[y + cblue];
+    outptr0 += RGB_PIXELSIZE;
+    y  = GETJSAMPLE(*inptr01++);
+    outptr1[RGB_RED] =   range_limit[y + cred];
+    outptr1[RGB_GREEN] = range_limit[y + cgreen];
+    outptr1[RGB_BLUE] =  range_limit[y + cblue];
+    outptr1 += RGB_PIXELSIZE;
+    y  = GETJSAMPLE(*inptr01++);
+    outptr1[RGB_RED] =   range_limit[y + cred];
+    outptr1[RGB_GREEN] = range_limit[y + cgreen];
+    outptr1[RGB_BLUE] =  range_limit[y + cblue];
+    outptr1 += RGB_PIXELSIZE;
+  }
+  /* If image width is odd, do the last output column separately */
+  if (cinfo->output_width & 1) {
+    cb = GETJSAMPLE(*inptr1);
+    cr = GETJSAMPLE(*inptr2);
+    cred = Crrtab[cr];
+    cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
+    cblue = Cbbtab[cb];
+    y  = GETJSAMPLE(*inptr00);
+    outptr0[RGB_RED] =   range_limit[y + cred];
+    outptr0[RGB_GREEN] = range_limit[y + cgreen];
+    outptr0[RGB_BLUE] =  range_limit[y + cblue];
+    y  = GETJSAMPLE(*inptr01);
+    outptr1[RGB_RED] =   range_limit[y + cred];
+    outptr1[RGB_GREEN] = range_limit[y + cgreen];
+    outptr1[RGB_BLUE] =  range_limit[y + cblue];
+  }
+}
+
+
+/*
+ * Module initialization routine for merged upsampling/color conversion.
+ *
+ * NB: this is called under the conditions determined by use_merged_upsample()
+ * in jdmaster.c.  That routine MUST correspond to the actual capabilities
+ * of this module; no safety checks are made here.
+ */
+
+GLOBAL(void)
+jinit_merged_upsampler (j_decompress_ptr cinfo)
+{
+  my_upsample_ptr upsample;
+
+  upsample = (my_upsample_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_upsampler));
+  cinfo->upsample = (struct jpeg_upsampler *) upsample;
+  upsample->pub.start_pass = start_pass_merged_upsample;
+  upsample->pub.need_context_rows = FALSE;
+
+  upsample->out_row_width = cinfo->output_width * cinfo->out_color_components;
+
+  if (cinfo->max_v_samp_factor == 2) {
+    upsample->pub.upsample = merged_2v_upsample;
+    upsample->upmethod = h2v2_merged_upsample;
+    /* Allocate a spare row buffer */
+    upsample->spare_row = (JSAMPROW)
+      (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+		(size_t) (upsample->out_row_width * SIZEOF(JSAMPLE)));
+  } else {
+    upsample->pub.upsample = merged_1v_upsample;
+    upsample->upmethod = h2v1_merged_upsample;
+    /* No spare row needed */
+    upsample->spare_row = NULL;
+  }
+
+  build_ycc_rgb_table(cinfo);
+}
+
+#endif /* UPSAMPLE_MERGING_SUPPORTED */
diff --git a/common/jpeg/jdphuff.c b/common/jpeg/jdphuff.c
new file mode 100644
index 00000000..22678099
--- /dev/null
+++ b/common/jpeg/jdphuff.c
@@ -0,0 +1,668 @@
+/*
+ * jdphuff.c
+ *
+ * Copyright (C) 1995-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains Huffman entropy decoding routines for progressive JPEG.
+ *
+ * Much of the complexity here has to do with supporting input suspension.
+ * If the data source module demands suspension, we want to be able to back
+ * up to the start of the current MCU.  To do this, we copy state variables
+ * into local working storage, and update them back to the permanent
+ * storage only upon successful completion of an MCU.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdhuff.h"		/* Declarations shared with jdhuff.c */
+
+
+#ifdef D_PROGRESSIVE_SUPPORTED
+
+/*
+ * Expanded entropy decoder object for progressive Huffman decoding.
+ *
+ * The savable_state subrecord contains fields that change within an MCU,
+ * but must not be updated permanently until we complete the MCU.
+ */
+
+typedef struct {
+  unsigned int EOBRUN;			/* remaining EOBs in EOBRUN */
+  int last_dc_val[MAX_COMPS_IN_SCAN];	/* last DC coef for each component */
+} savable_state;
+
+/* This macro is to work around compilers with missing or broken
+ * structure assignment.  You'll need to fix this code if you have
+ * such a compiler and you change MAX_COMPS_IN_SCAN.
+ */
+
+#ifndef NO_STRUCT_ASSIGN
+#define ASSIGN_STATE(dest,src)  ((dest) = (src))
+#else
+#if MAX_COMPS_IN_SCAN == 4
+#define ASSIGN_STATE(dest,src)  \
+	((dest).EOBRUN = (src).EOBRUN, \
+	 (dest).last_dc_val[0] = (src).last_dc_val[0], \
+	 (dest).last_dc_val[1] = (src).last_dc_val[1], \
+	 (dest).last_dc_val[2] = (src).last_dc_val[2], \
+	 (dest).last_dc_val[3] = (src).last_dc_val[3])
+#endif
+#endif
+
+
+typedef struct {
+  struct jpeg_entropy_decoder pub; /* public fields */
+
+  /* These fields are loaded into local variables at start of each MCU.
+   * In case of suspension, we exit WITHOUT updating them.
+   */
+  bitread_perm_state bitstate;	/* Bit buffer at start of MCU */
+  savable_state saved;		/* Other state at start of MCU */
+
+  /* These fields are NOT loaded into local working state. */
+  unsigned int restarts_to_go;	/* MCUs left in this restart interval */
+
+  /* Pointers to derived tables (these workspaces have image lifespan) */
+  d_derived_tbl * derived_tbls[NUM_HUFF_TBLS];
+
+  d_derived_tbl * ac_derived_tbl; /* active table during an AC scan */
+} phuff_entropy_decoder;
+
+typedef phuff_entropy_decoder * phuff_entropy_ptr;
+
+/* Forward declarations */
+METHODDEF(boolean) decode_mcu_DC_first JPP((j_decompress_ptr cinfo,
+					    JBLOCKROW *MCU_data));
+METHODDEF(boolean) decode_mcu_AC_first JPP((j_decompress_ptr cinfo,
+					    JBLOCKROW *MCU_data));
+METHODDEF(boolean) decode_mcu_DC_refine JPP((j_decompress_ptr cinfo,
+					     JBLOCKROW *MCU_data));
+METHODDEF(boolean) decode_mcu_AC_refine JPP((j_decompress_ptr cinfo,
+					     JBLOCKROW *MCU_data));
+
+
+/*
+ * Initialize for a Huffman-compressed scan.
+ */
+
+METHODDEF(void)
+start_pass_phuff_decoder (j_decompress_ptr cinfo)
+{
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  boolean is_DC_band, bad;
+  int ci, coefi, tbl;
+  int *coef_bit_ptr;
+  jpeg_component_info * compptr;
+
+  is_DC_band = (cinfo->Ss == 0);
+
+  /* Validate scan parameters */
+  bad = FALSE;
+  if (is_DC_band) {
+    if (cinfo->Se != 0)
+      bad = TRUE;
+  } else {
+    /* need not check Ss/Se < 0 since they came from unsigned bytes */
+    if (cinfo->Ss > cinfo->Se || cinfo->Se >= DCTSIZE2)
+      bad = TRUE;
+    /* AC scans may have only one component */
+    if (cinfo->comps_in_scan != 1)
+      bad = TRUE;
+  }
+  if (cinfo->Ah != 0) {
+    /* Successive approximation refinement scan: must have Al = Ah-1. */
+    if (cinfo->Al != cinfo->Ah-1)
+      bad = TRUE;
+  }
+  if (cinfo->Al > 13)		/* need not check for < 0 */
+    bad = TRUE;
+  /* Arguably the maximum Al value should be less than 13 for 8-bit precision,
+   * but the spec doesn't say so, and we try to be liberal about what we
+   * accept.  Note: large Al values could result in out-of-range DC
+   * coefficients during early scans, leading to bizarre displays due to
+   * overflows in the IDCT math.  But we won't crash.
+   */
+  if (bad)
+    ERREXIT4(cinfo, JERR_BAD_PROGRESSION,
+	     cinfo->Ss, cinfo->Se, cinfo->Ah, cinfo->Al);
+  /* Update progression status, and verify that scan order is legal.
+   * Note that inter-scan inconsistencies are treated as warnings
+   * not fatal errors ... not clear if this is right way to behave.
+   */
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    int cindex = cinfo->cur_comp_info[ci]->component_index;
+    coef_bit_ptr = & cinfo->coef_bits[cindex][0];
+    if (!is_DC_band && coef_bit_ptr[0] < 0) /* AC without prior DC scan */
+      WARNMS2(cinfo, JWRN_BOGUS_PROGRESSION, cindex, 0);
+    for (coefi = cinfo->Ss; coefi <= cinfo->Se; coefi++) {
+      int expected = (coef_bit_ptr[coefi] < 0) ? 0 : coef_bit_ptr[coefi];
+      if (cinfo->Ah != expected)
+	WARNMS2(cinfo, JWRN_BOGUS_PROGRESSION, cindex, coefi);
+      coef_bit_ptr[coefi] = cinfo->Al;
+    }
+  }
+
+  /* Select MCU decoding routine */
+  if (cinfo->Ah == 0) {
+    if (is_DC_band)
+      entropy->pub.decode_mcu = decode_mcu_DC_first;
+    else
+      entropy->pub.decode_mcu = decode_mcu_AC_first;
+  } else {
+    if (is_DC_band)
+      entropy->pub.decode_mcu = decode_mcu_DC_refine;
+    else
+      entropy->pub.decode_mcu = decode_mcu_AC_refine;
+  }
+
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
+    compptr = cinfo->cur_comp_info[ci];
+    /* Make sure requested tables are present, and compute derived tables.
+     * We may build same derived table more than once, but it's not expensive.
+     */
+    if (is_DC_band) {
+      if (cinfo->Ah == 0) {	/* DC refinement needs no table */
+	tbl = compptr->dc_tbl_no;
+	jpeg_make_d_derived_tbl(cinfo, TRUE, tbl,
+				& entropy->derived_tbls[tbl]);
+      }
+    } else {
+      tbl = compptr->ac_tbl_no;
+      jpeg_make_d_derived_tbl(cinfo, FALSE, tbl,
+			      & entropy->derived_tbls[tbl]);
+      /* remember the single active table */
+      entropy->ac_derived_tbl = entropy->derived_tbls[tbl];
+    }
+    /* Initialize DC predictions to 0 */
+    entropy->saved.last_dc_val[ci] = 0;
+  }
+
+  /* Initialize bitread state variables */
+  entropy->bitstate.bits_left = 0;
+  entropy->bitstate.get_buffer = 0; /* unnecessary, but keeps Purify quiet */
+  entropy->pub.insufficient_data = FALSE;
+
+  /* Initialize private state variables */
+  entropy->saved.EOBRUN = 0;
+
+  /* Initialize restart counter */
+  entropy->restarts_to_go = cinfo->restart_interval;
+}
+
+
+/*
+ * Figure F.12: extend sign bit.
+ * On some machines, a shift and add will be faster than a table lookup.
+ */
+
+#ifdef AVOID_TABLES
+
+#define HUFF_EXTEND(x,s)  ((x) < (1<<((s)-1)) ? (x) + (((-1)<<(s)) + 1) : (x))
+
+#else
+
+#define HUFF_EXTEND(x,s)  ((x) < extend_test[s] ? (x) + extend_offset[s] : (x))
+
+static const int extend_test[16] =   /* entry n is 2**(n-1) */
+  { 0, 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
+    0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000 };
+
+static const int extend_offset[16] = /* entry n is (-1 << n) + 1 */
+  { 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
+    ((-1)<<5) + 1, ((-1)<<6) + 1, ((-1)<<7) + 1, ((-1)<<8) + 1,
+    ((-1)<<9) + 1, ((-1)<<10) + 1, ((-1)<<11) + 1, ((-1)<<12) + 1,
+    ((-1)<<13) + 1, ((-1)<<14) + 1, ((-1)<<15) + 1 };
+
+#endif /* AVOID_TABLES */
+
+
+/*
+ * Check for a restart marker & resynchronize decoder.
+ * Returns FALSE if must suspend.
+ */
+
+LOCAL(boolean)
+process_restart (j_decompress_ptr cinfo)
+{
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  int ci;
+
+  /* Throw away any unused bits remaining in bit buffer; */
+  /* include any full bytes in next_marker's count of discarded bytes */
+  cinfo->marker->discarded_bytes += entropy->bitstate.bits_left / 8;
+  entropy->bitstate.bits_left = 0;
+
+  /* Advance past the RSTn marker */
+  if (! (*cinfo->marker->read_restart_marker) (cinfo))
+    return FALSE;
+
+  /* Re-initialize DC predictions to 0 */
+  for (ci = 0; ci < cinfo->comps_in_scan; ci++)
+    entropy->saved.last_dc_val[ci] = 0;
+  /* Re-init EOB run count, too */
+  entropy->saved.EOBRUN = 0;
+
+  /* Reset restart counter */
+  entropy->restarts_to_go = cinfo->restart_interval;
+
+  /* Reset out-of-data flag, unless read_restart_marker left us smack up
+   * against a marker.  In that case we will end up treating the next data
+   * segment as empty, and we can avoid producing bogus output pixels by
+   * leaving the flag set.
+   */
+  if (cinfo->unread_marker == 0)
+    entropy->pub.insufficient_data = FALSE;
+
+  return TRUE;
+}
+
+
+/*
+ * Huffman MCU decoding.
+ * Each of these routines decodes and returns one MCU's worth of
+ * Huffman-compressed coefficients. 
+ * The coefficients are reordered from zigzag order into natural array order,
+ * but are not dequantized.
+ *
+ * The i'th block of the MCU is stored into the block pointed to by
+ * MCU_data[i].  WE ASSUME THIS AREA IS INITIALLY ZEROED BY THE CALLER.
+ *
+ * We return FALSE if data source requested suspension.  In that case no
+ * changes have been made to permanent state.  (Exception: some output
+ * coefficients may already have been assigned.  This is harmless for
+ * spectral selection, since we'll just re-assign them on the next call.
+ * Successive approximation AC refinement has to be more careful, however.)
+ */
+
+/*
+ * MCU decoding for DC initial scan (either spectral selection,
+ * or first pass of successive approximation).
+ */
+
+METHODDEF(boolean)
+decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+{   
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  int Al = cinfo->Al;
+  register int s, r;
+  int blkn, ci;
+  JBLOCKROW block;
+  BITREAD_STATE_VARS;
+  savable_state state;
+  d_derived_tbl * tbl;
+  jpeg_component_info * compptr;
+
+  /* Process restart marker if needed; may have to suspend */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0)
+      if (! process_restart(cinfo))
+	return FALSE;
+  }
+
+  /* If we've run out of data, just leave the MCU set to zeroes.
+   * This way, we return uniform gray for the remainder of the segment.
+   */
+  if (! entropy->pub.insufficient_data) {
+
+    /* Load up working state */
+    BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+    ASSIGN_STATE(state, entropy->saved);
+
+    /* Outer loop handles each block in the MCU */
+
+    for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+      block = MCU_data[blkn];
+      ci = cinfo->MCU_membership[blkn];
+      compptr = cinfo->cur_comp_info[ci];
+      tbl = entropy->derived_tbls[compptr->dc_tbl_no];
+
+      /* Decode a single block's worth of coefficients */
+
+      /* Section F.2.2.1: decode the DC coefficient difference */
+      HUFF_DECODE(s, br_state, tbl, return FALSE, label1);
+      if (s) {
+	CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	r = GET_BITS(s);
+	s = HUFF_EXTEND(r, s);
+      }
+
+      /* Convert DC difference to actual value, update last_dc_val */
+      s += state.last_dc_val[ci];
+      state.last_dc_val[ci] = s;
+      /* Scale and output the coefficient (assumes jpeg_natural_order[0]=0) */
+      (*block)[0] = (JCOEF) (s << Al);
+    }
+
+    /* Completed MCU, so update state */
+    BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+    ASSIGN_STATE(entropy->saved, state);
+  }
+
+  /* Account for restart interval (no-op if not using restarts) */
+  entropy->restarts_to_go--;
+
+  return TRUE;
+}
+
+
+/*
+ * MCU decoding for AC initial scan (either spectral selection,
+ * or first pass of successive approximation).
+ */
+
+METHODDEF(boolean)
+decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+{   
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  int Se = cinfo->Se;
+  int Al = cinfo->Al;
+  register int s, k, r;
+  unsigned int EOBRUN;
+  JBLOCKROW block;
+  BITREAD_STATE_VARS;
+  d_derived_tbl * tbl;
+
+  /* Process restart marker if needed; may have to suspend */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0)
+      if (! process_restart(cinfo))
+	return FALSE;
+  }
+
+  /* If we've run out of data, just leave the MCU set to zeroes.
+   * This way, we return uniform gray for the remainder of the segment.
+   */
+  if (! entropy->pub.insufficient_data) {
+
+    /* Load up working state.
+     * We can avoid loading/saving bitread state if in an EOB run.
+     */
+    EOBRUN = entropy->saved.EOBRUN;	/* only part of saved state we need */
+
+    /* There is always only one block per MCU */
+
+    if (EOBRUN > 0)		/* if it's a band of zeroes... */
+      EOBRUN--;			/* ...process it now (we do nothing) */
+    else {
+      BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+      block = MCU_data[0];
+      tbl = entropy->ac_derived_tbl;
+
+      for (k = cinfo->Ss; k <= Se; k++) {
+	HUFF_DECODE(s, br_state, tbl, return FALSE, label2);
+	r = s >> 4;
+	s &= 15;
+	if (s) {
+	  k += r;
+	  CHECK_BIT_BUFFER(br_state, s, return FALSE);
+	  r = GET_BITS(s);
+	  s = HUFF_EXTEND(r, s);
+	  /* Scale and output coefficient in natural (dezigzagged) order */
+	  (*block)[jpeg_natural_order[k]] = (JCOEF) (s << Al);
+	} else {
+	  if (r == 15) {	/* ZRL */
+	    k += 15;		/* skip 15 zeroes in band */
+	  } else {		/* EOBr, run length is 2^r + appended bits */
+	    EOBRUN = 1 << r;
+	    if (r) {		/* EOBr, r > 0 */
+	      CHECK_BIT_BUFFER(br_state, r, return FALSE);
+	      r = GET_BITS(r);
+	      EOBRUN += r;
+	    }
+	    EOBRUN--;		/* this band is processed at this moment */
+	    break;		/* force end-of-band */
+	  }
+	}
+      }
+
+      BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+    }
+
+    /* Completed MCU, so update state */
+    entropy->saved.EOBRUN = EOBRUN;	/* only part of saved state we need */
+  }
+
+  /* Account for restart interval (no-op if not using restarts) */
+  entropy->restarts_to_go--;
+
+  return TRUE;
+}
+
+
+/*
+ * MCU decoding for DC successive approximation refinement scan.
+ * Note: we assume such scans can be multi-component, although the spec
+ * is not very clear on the point.
+ */
+
+METHODDEF(boolean)
+decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+{   
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  int p1 = 1 << cinfo->Al;	/* 1 in the bit position being coded */
+  int blkn;
+  JBLOCKROW block;
+  BITREAD_STATE_VARS;
+
+  /* Process restart marker if needed; may have to suspend */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0)
+      if (! process_restart(cinfo))
+	return FALSE;
+  }
+
+  /* Not worth the cycles to check insufficient_data here,
+   * since we will not change the data anyway if we read zeroes.
+   */
+
+  /* Load up working state */
+  BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+
+  /* Outer loop handles each block in the MCU */
+
+  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
+    block = MCU_data[blkn];
+
+    /* Encoded data is simply the next bit of the two's-complement DC value */
+    CHECK_BIT_BUFFER(br_state, 1, return FALSE);
+    if (GET_BITS(1))
+      (*block)[0] |= p1;
+    /* Note: since we use |=, repeating the assignment later is safe */
+  }
+
+  /* Completed MCU, so update state */
+  BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+
+  /* Account for restart interval (no-op if not using restarts) */
+  entropy->restarts_to_go--;
+
+  return TRUE;
+}
+
+
+/*
+ * MCU decoding for AC successive approximation refinement scan.
+ */
+
+METHODDEF(boolean)
+decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
+{   
+  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
+  int Se = cinfo->Se;
+  int p1 = 1 << cinfo->Al;	/* 1 in the bit position being coded */
+  int m1 = (-1) << cinfo->Al;	/* -1 in the bit position being coded */
+  register int s, k, r;
+  unsigned int EOBRUN;
+  JBLOCKROW block;
+  JCOEFPTR thiscoef;
+  BITREAD_STATE_VARS;
+  d_derived_tbl * tbl;
+  int num_newnz;
+  int newnz_pos[DCTSIZE2];
+
+  /* Process restart marker if needed; may have to suspend */
+  if (cinfo->restart_interval) {
+    if (entropy->restarts_to_go == 0)
+      if (! process_restart(cinfo))
+	return FALSE;
+  }
+
+  /* If we've run out of data, don't modify the MCU.
+   */
+  if (! entropy->pub.insufficient_data) {
+
+    /* Load up working state */
+    BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
+    EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we need */
+
+    /* There is always only one block per MCU */
+    block = MCU_data[0];
+    tbl = entropy->ac_derived_tbl;
+
+    /* If we are forced to suspend, we must undo the assignments to any newly
+     * nonzero coefficients in the block, because otherwise we'd get confused
+     * next time about which coefficients were already nonzero.
+     * But we need not undo addition of bits to already-nonzero coefficients;
+     * instead, we can test the current bit to see if we already did it.
+     */
+    num_newnz = 0;
+
+    /* initialize coefficient loop counter to start of band */
+    k = cinfo->Ss;
+
+    if (EOBRUN == 0) {
+      for (; k <= Se; k++) {
+	HUFF_DECODE(s, br_state, tbl, goto undoit, label3);
+	r = s >> 4;
+	s &= 15;
+	if (s) {
+	  if (s != 1)		/* size of new coef should always be 1 */
+	    WARNMS(cinfo, JWRN_HUFF_BAD_CODE);
+	  CHECK_BIT_BUFFER(br_state, 1, goto undoit);
+	  if (GET_BITS(1))
+	    s = p1;		/* newly nonzero coef is positive */
+	  else
+	    s = m1;		/* newly nonzero coef is negative */
+	} else {
+	  if (r != 15) {
+	    EOBRUN = 1 << r;	/* EOBr, run length is 2^r + appended bits */
+	    if (r) {
+	      CHECK_BIT_BUFFER(br_state, r, goto undoit);
+	      r = GET_BITS(r);
+	      EOBRUN += r;
+	    }
+	    break;		/* rest of block is handled by EOB logic */
+	  }
+	  /* note s = 0 for processing ZRL */
+	}
+	/* Advance over already-nonzero coefs and r still-zero coefs,
+	 * appending correction bits to the nonzeroes.  A correction bit is 1
+	 * if the absolute value of the coefficient must be increased.
+	 */
+	do {
+	  thiscoef = *block + jpeg_natural_order[k];
+	  if (*thiscoef != 0) {
+	    CHECK_BIT_BUFFER(br_state, 1, goto undoit);
+	    if (GET_BITS(1)) {
+	      if ((*thiscoef & p1) == 0) { /* do nothing if already set it */
+		if (*thiscoef >= 0)
+		  *thiscoef += p1;
+		else
+		  *thiscoef += m1;
+	      }
+	    }
+	  } else {
+	    if (--r < 0)
+	      break;		/* reached target zero coefficient */
+	  }
+	  k++;
+	} while (k <= Se);
+	if (s) {
+	  int pos = jpeg_natural_order[k];
+	  /* Output newly nonzero coefficient */
+	  (*block)[pos] = (JCOEF) s;
+	  /* Remember its position in case we have to suspend */
+	  newnz_pos[num_newnz++] = pos;
+	}
+      }
+    }
+
+    if (EOBRUN > 0) {
+      /* Scan any remaining coefficient positions after the end-of-band
+       * (the last newly nonzero coefficient, if any).  Append a correction
+       * bit to each already-nonzero coefficient.  A correction bit is 1
+       * if the absolute value of the coefficient must be increased.
+       */
+      for (; k <= Se; k++) {
+	thiscoef = *block + jpeg_natural_order[k];
+	if (*thiscoef != 0) {
+	  CHECK_BIT_BUFFER(br_state, 1, goto undoit);
+	  if (GET_BITS(1)) {
+	    if ((*thiscoef & p1) == 0) { /* do nothing if already changed it */
+	      if (*thiscoef >= 0)
+		*thiscoef += p1;
+	      else
+		*thiscoef += m1;
+	    }
+	  }
+	}
+      }
+      /* Count one block completed in EOB run */
+      EOBRUN--;
+    }
+
+    /* Completed MCU, so update state */
+    BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
+    entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we need */
+  }
+
+  /* Account for restart interval (no-op if not using restarts) */
+  entropy->restarts_to_go--;
+
+  return TRUE;
+
+undoit:
+  /* Re-zero any output coefficients that we made newly nonzero */
+  while (num_newnz > 0)
+    (*block)[newnz_pos[--num_newnz]] = 0;
+
+  return FALSE;
+}
+
+
+/*
+ * Module initialization routine for progressive Huffman entropy decoding.
+ */
+
+GLOBAL(void)
+jinit_phuff_decoder (j_decompress_ptr cinfo)
+{
+  phuff_entropy_ptr entropy;
+  int *coef_bit_ptr;
+  int ci, i;
+
+  entropy = (phuff_entropy_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(phuff_entropy_decoder));
+  cinfo->entropy = (struct jpeg_entropy_decoder *) entropy;
+  entropy->pub.start_pass = start_pass_phuff_decoder;
+
+  /* Mark derived tables unallocated */
+  for (i = 0; i < NUM_HUFF_TBLS; i++) {
+    entropy->derived_tbls[i] = NULL;
+  }
+
+  /* Create progression status table */
+  cinfo->coef_bits = (int (*)[DCTSIZE2])
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				cinfo->num_components*DCTSIZE2*SIZEOF(int));
+  coef_bit_ptr = & cinfo->coef_bits[0][0];
+  for (ci = 0; ci < cinfo->num_components; ci++) 
+    for (i = 0; i < DCTSIZE2; i++)
+      *coef_bit_ptr++ = -1;
+}
+
+#endif /* D_PROGRESSIVE_SUPPORTED */
diff --git a/common/jpeg/jdpostct.c b/common/jpeg/jdpostct.c
new file mode 100644
index 00000000..571563d7
--- /dev/null
+++ b/common/jpeg/jdpostct.c
@@ -0,0 +1,290 @@
+/*
+ * jdpostct.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the decompression postprocessing controller.
+ * This controller manages the upsampling, color conversion, and color
+ * quantization/reduction steps; specifically, it controls the buffering
+ * between upsample/color conversion and color quantization/reduction.
+ *
+ * If no color quantization/reduction is required, then this module has no
+ * work to do, and it just hands off to the upsample/color conversion code.
+ * An integrated upsample/convert/quantize process would replace this module
+ * entirely.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Private buffer controller object */
+
+typedef struct {
+  struct jpeg_d_post_controller pub; /* public fields */
+
+  /* Color quantization source buffer: this holds output data from
+   * the upsample/color conversion step to be passed to the quantizer.
+   * For two-pass color quantization, we need a full-image buffer;
+   * for one-pass operation, a strip buffer is sufficient.
+   */
+  jvirt_sarray_ptr whole_image;	/* virtual array, or NULL if one-pass */
+  JSAMPARRAY buffer;		/* strip buffer, or current strip of virtual */
+  JDIMENSION strip_height;	/* buffer size in rows */
+  /* for two-pass mode only: */
+  JDIMENSION starting_row;	/* row # of first row in current strip */
+  JDIMENSION next_row;		/* index of next row to fill/empty in strip */
+} my_post_controller;
+
+typedef my_post_controller * my_post_ptr;
+
+
+/* Forward declarations */
+METHODDEF(void) post_process_1pass
+	JPP((j_decompress_ptr cinfo,
+	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+	     JDIMENSION in_row_groups_avail,
+	     JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+	     JDIMENSION out_rows_avail));
+#ifdef QUANT_2PASS_SUPPORTED
+METHODDEF(void) post_process_prepass
+	JPP((j_decompress_ptr cinfo,
+	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+	     JDIMENSION in_row_groups_avail,
+	     JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+	     JDIMENSION out_rows_avail));
+METHODDEF(void) post_process_2pass
+	JPP((j_decompress_ptr cinfo,
+	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+	     JDIMENSION in_row_groups_avail,
+	     JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+	     JDIMENSION out_rows_avail));
+#endif
+
+
+/*
+ * Initialize for a processing pass.
+ */
+
+METHODDEF(void)
+start_pass_dpost (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
+{
+  my_post_ptr post = (my_post_ptr) cinfo->post;
+
+  switch (pass_mode) {
+  case JBUF_PASS_THRU:
+    if (cinfo->quantize_colors) {
+      /* Single-pass processing with color quantization. */
+      post->pub.post_process_data = post_process_1pass;
+      /* We could be doing buffered-image output before starting a 2-pass
+       * color quantization; in that case, jinit_d_post_controller did not
+       * allocate a strip buffer.  Use the virtual-array buffer as workspace.
+       */
+      if (post->buffer == NULL) {
+	post->buffer = (*cinfo->mem->access_virt_sarray)
+	  ((j_common_ptr) cinfo, post->whole_image,
+	   (JDIMENSION) 0, post->strip_height, TRUE);
+      }
+    } else {
+      /* For single-pass processing without color quantization,
+       * I have no work to do; just call the upsampler directly.
+       */
+      post->pub.post_process_data = cinfo->upsample->upsample;
+    }
+    break;
+#ifdef QUANT_2PASS_SUPPORTED
+  case JBUF_SAVE_AND_PASS:
+    /* First pass of 2-pass quantization */
+    if (post->whole_image == NULL)
+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    post->pub.post_process_data = post_process_prepass;
+    break;
+  case JBUF_CRANK_DEST:
+    /* Second pass of 2-pass quantization */
+    if (post->whole_image == NULL)
+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    post->pub.post_process_data = post_process_2pass;
+    break;
+#endif /* QUANT_2PASS_SUPPORTED */
+  default:
+    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+    break;
+  }
+  post->starting_row = post->next_row = 0;
+}
+
+
+/*
+ * Process some data in the one-pass (strip buffer) case.
+ * This is used for color precision reduction as well as one-pass quantization.
+ */
+
+METHODDEF(void)
+post_process_1pass (j_decompress_ptr cinfo,
+		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+		    JDIMENSION in_row_groups_avail,
+		    JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+		    JDIMENSION out_rows_avail)
+{
+  my_post_ptr post = (my_post_ptr) cinfo->post;
+  JDIMENSION num_rows, max_rows;
+
+  /* Fill the buffer, but not more than what we can dump out in one go. */
+  /* Note we rely on the upsampler to detect bottom of image. */
+  max_rows = out_rows_avail - *out_row_ctr;
+  if (max_rows > post->strip_height)
+    max_rows = post->strip_height;
+  num_rows = 0;
+  (*cinfo->upsample->upsample) (cinfo,
+		input_buf, in_row_group_ctr, in_row_groups_avail,
+		post->buffer, &num_rows, max_rows);
+  /* Quantize and emit data. */
+  (*cinfo->cquantize->color_quantize) (cinfo,
+		post->buffer, output_buf + *out_row_ctr, (int) num_rows);
+  *out_row_ctr += num_rows;
+}
+
+
+#ifdef QUANT_2PASS_SUPPORTED
+
+/*
+ * Process some data in the first pass of 2-pass quantization.
+ */
+
+METHODDEF(void)
+post_process_prepass (j_decompress_ptr cinfo,
+		      JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+		      JDIMENSION in_row_groups_avail,
+		      JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+		      JDIMENSION out_rows_avail)
+{
+  my_post_ptr post = (my_post_ptr) cinfo->post;
+  JDIMENSION old_next_row, num_rows;
+
+  /* Reposition virtual buffer if at start of strip. */
+  if (post->next_row == 0) {
+    post->buffer = (*cinfo->mem->access_virt_sarray)
+	((j_common_ptr) cinfo, post->whole_image,
+	 post->starting_row, post->strip_height, TRUE);
+  }
+
+  /* Upsample some data (up to a strip height's worth). */
+  old_next_row = post->next_row;
+  (*cinfo->upsample->upsample) (cinfo,
+		input_buf, in_row_group_ctr, in_row_groups_avail,
+		post->buffer, &post->next_row, post->strip_height);
+
+  /* Allow quantizer to scan new data.  No data is emitted, */
+  /* but we advance out_row_ctr so outer loop can tell when we're done. */
+  if (post->next_row > old_next_row) {
+    num_rows = post->next_row - old_next_row;
+    (*cinfo->cquantize->color_quantize) (cinfo, post->buffer + old_next_row,
+					 (JSAMPARRAY) NULL, (int) num_rows);
+    *out_row_ctr += num_rows;
+  }
+
+  /* Advance if we filled the strip. */
+  if (post->next_row >= post->strip_height) {
+    post->starting_row += post->strip_height;
+    post->next_row = 0;
+  }
+}
+
+
+/*
+ * Process some data in the second pass of 2-pass quantization.
+ */
+
+METHODDEF(void)
+post_process_2pass (j_decompress_ptr cinfo,
+		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+		    JDIMENSION in_row_groups_avail,
+		    JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+		    JDIMENSION out_rows_avail)
+{
+  my_post_ptr post = (my_post_ptr) cinfo->post;
+  JDIMENSION num_rows, max_rows;
+
+  /* Reposition virtual buffer if at start of strip. */
+  if (post->next_row == 0) {
+    post->buffer = (*cinfo->mem->access_virt_sarray)
+	((j_common_ptr) cinfo, post->whole_image,
+	 post->starting_row, post->strip_height, FALSE);
+  }
+
+  /* Determine number of rows to emit. */
+  num_rows = post->strip_height - post->next_row; /* available in strip */
+  max_rows = out_rows_avail - *out_row_ctr; /* available in output area */
+  if (num_rows > max_rows)
+    num_rows = max_rows;
+  /* We have to check bottom of image here, can't depend on upsampler. */
+  max_rows = cinfo->output_height - post->starting_row;
+  if (num_rows > max_rows)
+    num_rows = max_rows;
+
+  /* Quantize and emit data. */
+  (*cinfo->cquantize->color_quantize) (cinfo,
+		post->buffer + post->next_row, output_buf + *out_row_ctr,
+		(int) num_rows);
+  *out_row_ctr += num_rows;
+
+  /* Advance if we filled the strip. */
+  post->next_row += num_rows;
+  if (post->next_row >= post->strip_height) {
+    post->starting_row += post->strip_height;
+    post->next_row = 0;
+  }
+}
+
+#endif /* QUANT_2PASS_SUPPORTED */
+
+
+/*
+ * Initialize postprocessing controller.
+ */
+
+GLOBAL(void)
+jinit_d_post_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
+{
+  my_post_ptr post;
+
+  post = (my_post_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_post_controller));
+  cinfo->post = (struct jpeg_d_post_controller *) post;
+  post->pub.start_pass = start_pass_dpost;
+  post->whole_image = NULL;	/* flag for no virtual arrays */
+  post->buffer = NULL;		/* flag for no strip buffer */
+
+  /* Create the quantization buffer, if needed */
+  if (cinfo->quantize_colors) {
+    /* The buffer strip height is max_v_samp_factor, which is typically
+     * an efficient number of rows for upsampling to return.
+     * (In the presence of output rescaling, we might want to be smarter?)
+     */
+    post->strip_height = (JDIMENSION) cinfo->max_v_samp_factor;
+    if (need_full_buffer) {
+      /* Two-pass color quantization: need full-image storage. */
+      /* We round up the number of rows to a multiple of the strip height. */
+#ifdef QUANT_2PASS_SUPPORTED
+      post->whole_image = (*cinfo->mem->request_virt_sarray)
+	((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
+	 cinfo->output_width * cinfo->out_color_components,
+	 (JDIMENSION) jround_up((long) cinfo->output_height,
+				(long) post->strip_height),
+	 post->strip_height);
+#else
+      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+#endif /* QUANT_2PASS_SUPPORTED */
+    } else {
+      /* One-pass color quantization: just make a strip buffer. */
+      post->buffer = (*cinfo->mem->alloc_sarray)
+	((j_common_ptr) cinfo, JPOOL_IMAGE,
+	 cinfo->output_width * cinfo->out_color_components,
+	 post->strip_height);
+    }
+  }
+}
diff --git a/common/jpeg/jdsample.c b/common/jpeg/jdsample.c
new file mode 100644
index 00000000..80ffefb2
--- /dev/null
+++ b/common/jpeg/jdsample.c
@@ -0,0 +1,478 @@
+/*
+ * jdsample.c
+ *
+ * Copyright (C) 1991-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains upsampling routines.
+ *
+ * Upsampling input data is counted in "row groups".  A row group
+ * is defined to be (v_samp_factor * DCT_scaled_size / min_DCT_scaled_size)
+ * sample rows of each component.  Upsampling will normally produce
+ * max_v_samp_factor pixel rows from each row group (but this could vary
+ * if the upsampler is applying a scale factor of its own).
+ *
+ * An excellent reference for image resampling is
+ *   Digital Image Warping, George Wolberg, 1990.
+ *   Pub. by IEEE Computer Society Press, Los Alamitos, CA. ISBN 0-8186-8944-7.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Pointer to routine to upsample a single component */
+typedef JMETHOD(void, upsample1_ptr,
+		(j_decompress_ptr cinfo, jpeg_component_info * compptr,
+		 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr));
+
+/* Private subobject */
+
+typedef struct {
+  struct jpeg_upsampler pub;	/* public fields */
+
+  /* Color conversion buffer.  When using separate upsampling and color
+   * conversion steps, this buffer holds one upsampled row group until it
+   * has been color converted and output.
+   * Note: we do not allocate any storage for component(s) which are full-size,
+   * ie do not need rescaling.  The corresponding entry of color_buf[] is
+   * simply set to point to the input data array, thereby avoiding copying.
+   */
+  JSAMPARRAY color_buf[MAX_COMPONENTS];
+
+  /* Per-component upsampling method pointers */
+  upsample1_ptr methods[MAX_COMPONENTS];
+
+  int next_row_out;		/* counts rows emitted from color_buf */
+  JDIMENSION rows_to_go;	/* counts rows remaining in image */
+
+  /* Height of an input row group for each component. */
+  int rowgroup_height[MAX_COMPONENTS];
+
+  /* These arrays save pixel expansion factors so that int_expand need not
+   * recompute them each time.  They are unused for other upsampling methods.
+   */
+  UINT8 h_expand[MAX_COMPONENTS];
+  UINT8 v_expand[MAX_COMPONENTS];
+} my_upsampler;
+
+typedef my_upsampler * my_upsample_ptr;
+
+
+/*
+ * Initialize for an upsampling pass.
+ */
+
+METHODDEF(void)
+start_pass_upsample (j_decompress_ptr cinfo)
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+
+  /* Mark the conversion buffer empty */
+  upsample->next_row_out = cinfo->max_v_samp_factor;
+  /* Initialize total-height counter for detecting bottom of image */
+  upsample->rows_to_go = cinfo->output_height;
+}
+
+
+/*
+ * Control routine to do upsampling (and color conversion).
+ *
+ * In this version we upsample each component independently.
+ * We upsample one row group into the conversion buffer, then apply
+ * color conversion a row at a time.
+ */
+
+METHODDEF(void)
+sep_upsample (j_decompress_ptr cinfo,
+	      JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
+	      JDIMENSION in_row_groups_avail,
+	      JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+	      JDIMENSION out_rows_avail)
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+  int ci;
+  jpeg_component_info * compptr;
+  JDIMENSION num_rows;
+
+  /* Fill the conversion buffer, if it's empty */
+  if (upsample->next_row_out >= cinfo->max_v_samp_factor) {
+    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+	 ci++, compptr++) {
+      /* Invoke per-component upsample method.  Notice we pass a POINTER
+       * to color_buf[ci], so that fullsize_upsample can change it.
+       */
+      (*upsample->methods[ci]) (cinfo, compptr,
+	input_buf[ci] + (*in_row_group_ctr * upsample->rowgroup_height[ci]),
+	upsample->color_buf + ci);
+    }
+    upsample->next_row_out = 0;
+  }
+
+  /* Color-convert and emit rows */
+
+  /* How many we have in the buffer: */
+  num_rows = (JDIMENSION) (cinfo->max_v_samp_factor - upsample->next_row_out);
+  /* Not more than the distance to the end of the image.  Need this test
+   * in case the image height is not a multiple of max_v_samp_factor:
+   */
+  if (num_rows > upsample->rows_to_go) 
+    num_rows = upsample->rows_to_go;
+  /* And not more than what the client can accept: */
+  out_rows_avail -= *out_row_ctr;
+  if (num_rows > out_rows_avail)
+    num_rows = out_rows_avail;
+
+  (*cinfo->cconvert->color_convert) (cinfo, upsample->color_buf,
+				     (JDIMENSION) upsample->next_row_out,
+				     output_buf + *out_row_ctr,
+				     (int) num_rows);
+
+  /* Adjust counts */
+  *out_row_ctr += num_rows;
+  upsample->rows_to_go -= num_rows;
+  upsample->next_row_out += num_rows;
+  /* When the buffer is emptied, declare this input row group consumed */
+  if (upsample->next_row_out >= cinfo->max_v_samp_factor)
+    (*in_row_group_ctr)++;
+}
+
+
+/*
+ * These are the routines invoked by sep_upsample to upsample pixel values
+ * of a single component.  One row group is processed per call.
+ */
+
+
+/*
+ * For full-size components, we just make color_buf[ci] point at the
+ * input buffer, and thus avoid copying any data.  Note that this is
+ * safe only because sep_upsample doesn't declare the input row group
+ * "consumed" until we are done color converting and emitting it.
+ */
+
+METHODDEF(void)
+fullsize_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+		   JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
+{
+  *output_data_ptr = input_data;
+}
+
+
+/*
+ * This is a no-op version used for "uninteresting" components.
+ * These components will not be referenced by color conversion.
+ */
+
+METHODDEF(void)
+noop_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
+{
+  *output_data_ptr = NULL;	/* safety check */
+}
+
+
+/*
+ * This version handles any integral sampling ratios.
+ * This is not used for typical JPEG files, so it need not be fast.
+ * Nor, for that matter, is it particularly accurate: the algorithm is
+ * simple replication of the input pixel onto the corresponding output
+ * pixels.  The hi-falutin sampling literature refers to this as a
+ * "box filter".  A box filter tends to introduce visible artifacts,
+ * so if you are actually going to use 3:1 or 4:1 sampling ratios
+ * you would be well advised to improve this code.
+ */
+
+METHODDEF(void)
+int_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	      JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
+{
+  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
+  JSAMPARRAY output_data = *output_data_ptr;
+  register JSAMPROW inptr, outptr;
+  register JSAMPLE invalue;
+  register int h;
+  JSAMPROW outend;
+  int h_expand, v_expand;
+  int inrow, outrow;
+
+  h_expand = upsample->h_expand[compptr->component_index];
+  v_expand = upsample->v_expand[compptr->component_index];
+
+  inrow = outrow = 0;
+  while (outrow < cinfo->max_v_samp_factor) {
+    /* Generate one output row with proper horizontal expansion */
+    inptr = input_data[inrow];
+    outptr = output_data[outrow];
+    outend = outptr + cinfo->output_width;
+    while (outptr < outend) {
+      invalue = *inptr++;	/* don't need GETJSAMPLE() here */
+      for (h = h_expand; h > 0; h--) {
+	*outptr++ = invalue;
+      }
+    }
+    /* Generate any additional output rows by duplicating the first one */
+    if (v_expand > 1) {
+      jcopy_sample_rows(output_data, outrow, output_data, outrow+1,
+			v_expand-1, cinfo->output_width);
+    }
+    inrow++;
+    outrow += v_expand;
+  }
+}
+
+
+/*
+ * Fast processing for the common case of 2:1 horizontal and 1:1 vertical.
+ * It's still a box filter.
+ */
+
+METHODDEF(void)
+h2v1_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
+{
+  JSAMPARRAY output_data = *output_data_ptr;
+  register JSAMPROW inptr, outptr;
+  register JSAMPLE invalue;
+  JSAMPROW outend;
+  int inrow;
+
+  for (inrow = 0; inrow < cinfo->max_v_samp_factor; inrow++) {
+    inptr = input_data[inrow];
+    outptr = output_data[inrow];
+    outend = outptr + cinfo->output_width;
+    while (outptr < outend) {
+      invalue = *inptr++;	/* don't need GETJSAMPLE() here */
+      *outptr++ = invalue;
+      *outptr++ = invalue;
+    }
+  }
+}
+
+
+/*
+ * Fast processing for the common case of 2:1 horizontal and 2:1 vertical.
+ * It's still a box filter.
+ */
+
+METHODDEF(void)
+h2v2_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
+{
+  JSAMPARRAY output_data = *output_data_ptr;
+  register JSAMPROW inptr, outptr;
+  register JSAMPLE invalue;
+  JSAMPROW outend;
+  int inrow, outrow;
+
+  inrow = outrow = 0;
+  while (outrow < cinfo->max_v_samp_factor) {
+    inptr = input_data[inrow];
+    outptr = output_data[outrow];
+    outend = outptr + cinfo->output_width;
+    while (outptr < outend) {
+      invalue = *inptr++;	/* don't need GETJSAMPLE() here */
+      *outptr++ = invalue;
+      *outptr++ = invalue;
+    }
+    jcopy_sample_rows(output_data, outrow, output_data, outrow+1,
+		      1, cinfo->output_width);
+    inrow++;
+    outrow += 2;
+  }
+}
+
+
+/*
+ * Fancy processing for the common case of 2:1 horizontal and 1:1 vertical.
+ *
+ * The upsampling algorithm is linear interpolation between pixel centers,
+ * also known as a "triangle filter".  This is a good compromise between
+ * speed and visual quality.  The centers of the output pixels are 1/4 and 3/4
+ * of the way between input pixel centers.
+ *
+ * A note about the "bias" calculations: when rounding fractional values to
+ * integer, we do not want to always round 0.5 up to the next integer.
+ * If we did that, we'd introduce a noticeable bias towards larger values.
+ * Instead, this code is arranged so that 0.5 will be rounded up or down at
+ * alternate pixel locations (a simple ordered dither pattern).
+ */
+
+METHODDEF(void)
+h2v1_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+		     JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
+{
+  JSAMPARRAY output_data = *output_data_ptr;
+  register JSAMPROW inptr, outptr;
+  register int invalue;
+  register JDIMENSION colctr;
+  int inrow;
+
+  for (inrow = 0; inrow < cinfo->max_v_samp_factor; inrow++) {
+    inptr = input_data[inrow];
+    outptr = output_data[inrow];
+    /* Special case for first column */
+    invalue = GETJSAMPLE(*inptr++);
+    *outptr++ = (JSAMPLE) invalue;
+    *outptr++ = (JSAMPLE) ((invalue * 3 + GETJSAMPLE(*inptr) + 2) >> 2);
+
+    for (colctr = compptr->downsampled_width - 2; colctr > 0; colctr--) {
+      /* General case: 3/4 * nearer pixel + 1/4 * further pixel */
+      invalue = GETJSAMPLE(*inptr++) * 3;
+      *outptr++ = (JSAMPLE) ((invalue + GETJSAMPLE(inptr[-2]) + 1) >> 2);
+      *outptr++ = (JSAMPLE) ((invalue + GETJSAMPLE(*inptr) + 2) >> 2);
+    }
+
+    /* Special case for last column */
+    invalue = GETJSAMPLE(*inptr);
+    *outptr++ = (JSAMPLE) ((invalue * 3 + GETJSAMPLE(inptr[-1]) + 1) >> 2);
+    *outptr++ = (JSAMPLE) invalue;
+  }
+}
+
+
+/*
+ * Fancy processing for the common case of 2:1 horizontal and 2:1 vertical.
+ * Again a triangle filter; see comments for h2v1 case, above.
+ *
+ * It is OK for us to reference the adjacent input rows because we demanded
+ * context from the main buffer controller (see initialization code).
+ */
+
+METHODDEF(void)
+h2v2_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+		     JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
+{
+  JSAMPARRAY output_data = *output_data_ptr;
+  register JSAMPROW inptr0, inptr1, outptr;
+#if BITS_IN_JSAMPLE == 8
+  register int thiscolsum, lastcolsum, nextcolsum;
+#else
+  register INT32 thiscolsum, lastcolsum, nextcolsum;
+#endif
+  register JDIMENSION colctr;
+  int inrow, outrow, v;
+
+  inrow = outrow = 0;
+  while (outrow < cinfo->max_v_samp_factor) {
+    for (v = 0; v < 2; v++) {
+      /* inptr0 points to nearest input row, inptr1 points to next nearest */
+      inptr0 = input_data[inrow];
+      if (v == 0)		/* next nearest is row above */
+	inptr1 = input_data[inrow-1];
+      else			/* next nearest is row below */
+	inptr1 = input_data[inrow+1];
+      outptr = output_data[outrow++];
+
+      /* Special case for first column */
+      thiscolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++);
+      nextcolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++);
+      *outptr++ = (JSAMPLE) ((thiscolsum * 4 + 8) >> 4);
+      *outptr++ = (JSAMPLE) ((thiscolsum * 3 + nextcolsum + 7) >> 4);
+      lastcolsum = thiscolsum; thiscolsum = nextcolsum;
+
+      for (colctr = compptr->downsampled_width - 2; colctr > 0; colctr--) {
+	/* General case: 3/4 * nearer pixel + 1/4 * further pixel in each */
+	/* dimension, thus 9/16, 3/16, 3/16, 1/16 overall */
+	nextcolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++);
+	*outptr++ = (JSAMPLE) ((thiscolsum * 3 + lastcolsum + 8) >> 4);
+	*outptr++ = (JSAMPLE) ((thiscolsum * 3 + nextcolsum + 7) >> 4);
+	lastcolsum = thiscolsum; thiscolsum = nextcolsum;
+      }
+
+      /* Special case for last column */
+      *outptr++ = (JSAMPLE) ((thiscolsum * 3 + lastcolsum + 8) >> 4);
+      *outptr++ = (JSAMPLE) ((thiscolsum * 4 + 7) >> 4);
+    }
+    inrow++;
+  }
+}
+
+
+/*
+ * Module initialization routine for upsampling.
+ */
+
+GLOBAL(void)
+jinit_upsampler (j_decompress_ptr cinfo)
+{
+  my_upsample_ptr upsample;
+  int ci;
+  jpeg_component_info * compptr;
+  boolean need_buffer, do_fancy;
+  int h_in_group, v_in_group, h_out_group, v_out_group;
+
+  upsample = (my_upsample_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_upsampler));
+  cinfo->upsample = (struct jpeg_upsampler *) upsample;
+  upsample->pub.start_pass = start_pass_upsample;
+  upsample->pub.upsample = sep_upsample;
+  upsample->pub.need_context_rows = FALSE; /* until we find out differently */
+
+  if (cinfo->CCIR601_sampling)	/* this isn't supported */
+    ERREXIT(cinfo, JERR_CCIR601_NOTIMPL);
+
+  /* jdmainct.c doesn't support context rows when min_DCT_scaled_size = 1,
+   * so don't ask for it.
+   */
+  do_fancy = cinfo->do_fancy_upsampling && cinfo->min_DCT_scaled_size > 1;
+
+  /* Verify we can handle the sampling factors, select per-component methods,
+   * and create storage as needed.
+   */
+  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+       ci++, compptr++) {
+    /* Compute size of an "input group" after IDCT scaling.  This many samples
+     * are to be converted to max_h_samp_factor * max_v_samp_factor pixels.
+     */
+    h_in_group = (compptr->h_samp_factor * compptr->DCT_scaled_size) /
+		 cinfo->min_DCT_scaled_size;
+    v_in_group = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
+		 cinfo->min_DCT_scaled_size;
+    h_out_group = cinfo->max_h_samp_factor;
+    v_out_group = cinfo->max_v_samp_factor;
+    upsample->rowgroup_height[ci] = v_in_group; /* save for use later */
+    need_buffer = TRUE;
+    if (! compptr->component_needed) {
+      /* Don't bother to upsample an uninteresting component. */
+      upsample->methods[ci] = noop_upsample;
+      need_buffer = FALSE;
+    } else if (h_in_group == h_out_group && v_in_group == v_out_group) {
+      /* Fullsize components can be processed without any work. */
+      upsample->methods[ci] = fullsize_upsample;
+      need_buffer = FALSE;
+    } else if (h_in_group * 2 == h_out_group &&
+	       v_in_group == v_out_group) {
+      /* Special cases for 2h1v upsampling */
+      if (do_fancy && compptr->downsampled_width > 2)
+	upsample->methods[ci] = h2v1_fancy_upsample;
+      else
+	upsample->methods[ci] = h2v1_upsample;
+    } else if (h_in_group * 2 == h_out_group &&
+	       v_in_group * 2 == v_out_group) {
+      /* Special cases for 2h2v upsampling */
+      if (do_fancy && compptr->downsampled_width > 2) {
+	upsample->methods[ci] = h2v2_fancy_upsample;
+	upsample->pub.need_context_rows = TRUE;
+      } else
+	upsample->methods[ci] = h2v2_upsample;
+    } else if ((h_out_group % h_in_group) == 0 &&
+	       (v_out_group % v_in_group) == 0) {
+      /* Generic integral-factors upsampling method */
+      upsample->methods[ci] = int_upsample;
+      upsample->h_expand[ci] = (UINT8) (h_out_group / h_in_group);
+      upsample->v_expand[ci] = (UINT8) (v_out_group / v_in_group);
+    } else
+      ERREXIT(cinfo, JERR_FRACT_SAMPLE_NOTIMPL);
+    if (need_buffer) {
+      upsample->color_buf[ci] = (*cinfo->mem->alloc_sarray)
+	((j_common_ptr) cinfo, JPOOL_IMAGE,
+	 (JDIMENSION) jround_up((long) cinfo->output_width,
+				(long) cinfo->max_h_samp_factor),
+	 (JDIMENSION) cinfo->max_v_samp_factor);
+    }
+  }
+}
diff --git a/common/jpeg/jdtrans.c b/common/jpeg/jdtrans.c
new file mode 100644
index 00000000..6c0ab715
--- /dev/null
+++ b/common/jpeg/jdtrans.c
@@ -0,0 +1,143 @@
+/*
+ * jdtrans.c
+ *
+ * Copyright (C) 1995-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains library routines for transcoding decompression,
+ * that is, reading raw DCT coefficient arrays from an input JPEG file.
+ * The routines in jdapimin.c will also be needed by a transcoder.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/* Forward declarations */
+LOCAL(void) transdecode_master_selection JPP((j_decompress_ptr cinfo));
+
+
+/*
+ * Read the coefficient arrays from a JPEG file.
+ * jpeg_read_header must be completed before calling this.
+ *
+ * The entire image is read into a set of virtual coefficient-block arrays,
+ * one per component.  The return value is a pointer to the array of
+ * virtual-array descriptors.  These can be manipulated directly via the
+ * JPEG memory manager, or handed off to jpeg_write_coefficients().
+ * To release the memory occupied by the virtual arrays, call
+ * jpeg_finish_decompress() when done with the data.
+ *
+ * An alternative usage is to simply obtain access to the coefficient arrays
+ * during a buffered-image-mode decompression operation.  This is allowed
+ * after any jpeg_finish_output() call.  The arrays can be accessed until
+ * jpeg_finish_decompress() is called.  (Note that any call to the library
+ * may reposition the arrays, so don't rely on access_virt_barray() results
+ * to stay valid across library calls.)
+ *
+ * Returns NULL if suspended.  This case need be checked only if
+ * a suspending data source is used.
+ */
+
+GLOBAL(jvirt_barray_ptr *)
+jpeg_read_coefficients (j_decompress_ptr cinfo)
+{
+  if (cinfo->global_state == DSTATE_READY) {
+    /* First call: initialize active modules */
+    transdecode_master_selection(cinfo);
+    cinfo->global_state = DSTATE_RDCOEFS;
+  }
+  if (cinfo->global_state == DSTATE_RDCOEFS) {
+    /* Absorb whole file into the coef buffer */
+    for (;;) {
+      int retcode;
+      /* Call progress monitor hook if present */
+      if (cinfo->progress != NULL)
+	(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
+      /* Absorb some more input */
+      retcode = (*cinfo->inputctl->consume_input) (cinfo);
+      if (retcode == JPEG_SUSPENDED)
+	return NULL;
+      if (retcode == JPEG_REACHED_EOI)
+	break;
+      /* Advance progress counter if appropriate */
+      if (cinfo->progress != NULL &&
+	  (retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
+	if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
+	  /* startup underestimated number of scans; ratchet up one scan */
+	  cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
+	}
+      }
+    }
+    /* Set state so that jpeg_finish_decompress does the right thing */
+    cinfo->global_state = DSTATE_STOPPING;
+  }
+  /* At this point we should be in state DSTATE_STOPPING if being used
+   * standalone, or in state DSTATE_BUFIMAGE if being invoked to get access
+   * to the coefficients during a full buffered-image-mode decompression.
+   */
+  if ((cinfo->global_state == DSTATE_STOPPING ||
+       cinfo->global_state == DSTATE_BUFIMAGE) && cinfo->buffered_image) {
+    return cinfo->coef->coef_arrays;
+  }
+  /* Oops, improper usage */
+  ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  return NULL;			/* keep compiler happy */
+}
+
+
+/*
+ * Master selection of decompression modules for transcoding.
+ * This substitutes for jdmaster.c's initialization of the full decompressor.
+ */
+
+LOCAL(void)
+transdecode_master_selection (j_decompress_ptr cinfo)
+{
+  /* This is effectively a buffered-image operation. */
+  cinfo->buffered_image = TRUE;
+
+  /* Entropy decoding: either Huffman or arithmetic coding. */
+  if (cinfo->arith_code) {
+    ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
+  } else {
+    if (cinfo->progressive_mode) {
+#ifdef D_PROGRESSIVE_SUPPORTED
+      jinit_phuff_decoder(cinfo);
+#else
+      ERREXIT(cinfo, JERR_NOT_COMPILED);
+#endif
+    } else
+      jinit_huff_decoder(cinfo);
+  }
+
+  /* Always get a full-image coefficient buffer. */
+  jinit_d_coef_controller(cinfo, TRUE);
+
+  /* We can now tell the memory manager to allocate virtual arrays. */
+  (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
+
+  /* Initialize input side of decompressor to consume first scan. */
+  (*cinfo->inputctl->start_input_pass) (cinfo);
+
+  /* Initialize progress monitoring. */
+  if (cinfo->progress != NULL) {
+    int nscans;
+    /* Estimate number of scans to set pass_limit. */
+    if (cinfo->progressive_mode) {
+      /* Arbitrarily estimate 2 interleaved DC scans + 3 AC scans/component. */
+      nscans = 2 + 3 * cinfo->num_components;
+    } else if (cinfo->inputctl->has_multiple_scans) {
+      /* For a nonprogressive multiscan file, estimate 1 scan per component. */
+      nscans = cinfo->num_components;
+    } else {
+      nscans = 1;
+    }
+    cinfo->progress->pass_counter = 0L;
+    cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows * nscans;
+    cinfo->progress->completed_passes = 0;
+    cinfo->progress->total_passes = 1;
+  }
+}
diff --git a/common/jpeg/jerror.c b/common/jpeg/jerror.c
new file mode 100644
index 00000000..3da7be86
--- /dev/null
+++ b/common/jpeg/jerror.c
@@ -0,0 +1,252 @@
+/*
+ * jerror.c
+ *
+ * Copyright (C) 1991-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains simple error-reporting and trace-message routines.
+ * These are suitable for Unix-like systems and others where writing to
+ * stderr is the right thing to do.  Many applications will want to replace
+ * some or all of these routines.
+ *
+ * If you define USE_WINDOWS_MESSAGEBOX in jconfig.h or in the makefile,
+ * you get a Windows-specific hack to display error messages in a dialog box.
+ * It ain't much, but it beats dropping error messages into the bit bucket,
+ * which is what happens to output to stderr under most Windows C compilers.
+ *
+ * These routines are used by both the compression and decompression code.
+ */
+
+/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jversion.h"
+#include "jerror.h"
+
+#ifdef USE_WINDOWS_MESSAGEBOX
+#include <windows.h>
+#endif
+
+#ifndef EXIT_FAILURE		/* define exit() codes if not provided */
+#define EXIT_FAILURE  1
+#endif
+
+
+/*
+ * Create the message string table.
+ * We do this from the master message list in jerror.h by re-reading
+ * jerror.h with a suitable definition for macro JMESSAGE.
+ * The message table is made an external symbol just in case any applications
+ * want to refer to it directly.
+ */
+
+#ifdef NEED_SHORT_EXTERNAL_NAMES
+#define jpeg_std_message_table	jMsgTable
+#endif
+
+#define JMESSAGE(code,string)	string ,
+
+const char * const jpeg_std_message_table[] = {
+#include "jerror.h"
+  NULL
+};
+
+
+/*
+ * Error exit handler: must not return to caller.
+ *
+ * Applications may override this if they want to get control back after
+ * an error.  Typically one would longjmp somewhere instead of exiting.
+ * The setjmp buffer can be made a private field within an expanded error
+ * handler object.  Note that the info needed to generate an error message
+ * is stored in the error object, so you can generate the message now or
+ * later, at your convenience.
+ * You should make sure that the JPEG object is cleaned up (with jpeg_abort
+ * or jpeg_destroy) at some point.
+ */
+
+METHODDEF(void)
+error_exit (j_common_ptr cinfo)
+{
+  /* Always display the message */
+  (*cinfo->err->output_message) (cinfo);
+
+  /* Let the memory manager delete any temp files before we die */
+  jpeg_destroy(cinfo);
+
+  exit(EXIT_FAILURE);
+}
+
+
+/*
+ * Actual output of an error or trace message.
+ * Applications may override this method to send JPEG messages somewhere
+ * other than stderr.
+ *
+ * On Windows, printing to stderr is generally completely useless,
+ * so we provide optional code to produce an error-dialog popup.
+ * Most Windows applications will still prefer to override this routine,
+ * but if they don't, it'll do something at least marginally useful.
+ *
+ * NOTE: to use the library in an environment that doesn't support the
+ * C stdio library, you may have to delete the call to fprintf() entirely,
+ * not just not use this routine.
+ */
+
+METHODDEF(void)
+output_message (j_common_ptr cinfo)
+{
+  char buffer[JMSG_LENGTH_MAX];
+
+  /* Create the message */
+  (*cinfo->err->format_message) (cinfo, buffer);
+
+#ifdef USE_WINDOWS_MESSAGEBOX
+  /* Display it in a message dialog box */
+  MessageBox(GetActiveWindow(), buffer, "JPEG Library Error",
+	     MB_OK | MB_ICONERROR);
+#else
+  /* Send it to stderr, adding a newline */
+  fprintf(stderr, "%s\n", buffer);
+#endif
+}
+
+
+/*
+ * Decide whether to emit a trace or warning message.
+ * msg_level is one of:
+ *   -1: recoverable corrupt-data warning, may want to abort.
+ *    0: important advisory messages (always display to user).
+ *    1: first level of tracing detail.
+ *    2,3,...: successively more detailed tracing messages.
+ * An application might override this method if it wanted to abort on warnings
+ * or change the policy about which messages to display.
+ */
+
+METHODDEF(void)
+emit_message (j_common_ptr cinfo, int msg_level)
+{
+  struct jpeg_error_mgr * err = cinfo->err;
+
+  if (msg_level < 0) {
+    /* It's a warning message.  Since corrupt files may generate many warnings,
+     * the policy implemented here is to show only the first warning,
+     * unless trace_level >= 3.
+     */
+    if (err->num_warnings == 0 || err->trace_level >= 3)
+      (*err->output_message) (cinfo);
+    /* Always count warnings in num_warnings. */
+    err->num_warnings++;
+  } else {
+    /* It's a trace message.  Show it if trace_level >= msg_level. */
+    if (err->trace_level >= msg_level)
+      (*err->output_message) (cinfo);
+  }
+}
+
+
+/*
+ * Format a message string for the most recent JPEG error or message.
+ * The message is stored into buffer, which should be at least JMSG_LENGTH_MAX
+ * characters.  Note that no '\n' character is added to the string.
+ * Few applications should need to override this method.
+ */
+
+METHODDEF(void)
+format_message (j_common_ptr cinfo, char * buffer)
+{
+  struct jpeg_error_mgr * err = cinfo->err;
+  int msg_code = err->msg_code;
+  const char * msgtext = NULL;
+  const char * msgptr;
+  char ch;
+  boolean isstring;
+
+  /* Look up message string in proper table */
+  if (msg_code > 0 && msg_code <= err->last_jpeg_message) {
+    msgtext = err->jpeg_message_table[msg_code];
+  } else if (err->addon_message_table != NULL &&
+	     msg_code >= err->first_addon_message &&
+	     msg_code <= err->last_addon_message) {
+    msgtext = err->addon_message_table[msg_code - err->first_addon_message];
+  }
+
+  /* Defend against bogus message number */
+  if (msgtext == NULL) {
+    err->msg_parm.i[0] = msg_code;
+    msgtext = err->jpeg_message_table[0];
+  }
+
+  /* Check for string parameter, as indicated by %s in the message text */
+  isstring = FALSE;
+  msgptr = msgtext;
+  while ((ch = *msgptr++) != '\0') {
+    if (ch == '%') {
+      if (*msgptr == 's') isstring = TRUE;
+      break;
+    }
+  }
+
+  /* Format the message into the passed buffer */
+  if (isstring)
+    sprintf(buffer, msgtext, err->msg_parm.s);
+  else
+    sprintf(buffer, msgtext,
+	    err->msg_parm.i[0], err->msg_parm.i[1],
+	    err->msg_parm.i[2], err->msg_parm.i[3],
+	    err->msg_parm.i[4], err->msg_parm.i[5],
+	    err->msg_parm.i[6], err->msg_parm.i[7]);
+}
+
+
+/*
+ * Reset error state variables at start of a new image.
+ * This is called during compression startup to reset trace/error
+ * processing to default state, without losing any application-specific
+ * method pointers.  An application might possibly want to override
+ * this method if it has additional error processing state.
+ */
+
+METHODDEF(void)
+reset_error_mgr (j_common_ptr cinfo)
+{
+  cinfo->err->num_warnings = 0;
+  /* trace_level is not reset since it is an application-supplied parameter */
+  cinfo->err->msg_code = 0;	/* may be useful as a flag for "no error" */
+}
+
+
+/*
+ * Fill in the standard error-handling methods in a jpeg_error_mgr object.
+ * Typical call is:
+ *	struct jpeg_compress_struct cinfo;
+ *	struct jpeg_error_mgr err;
+ *
+ *	cinfo.err = jpeg_std_error(&err);
+ * after which the application may override some of the methods.
+ */
+
+GLOBAL(struct jpeg_error_mgr *)
+jpeg_std_error (struct jpeg_error_mgr * err)
+{
+  err->error_exit = error_exit;
+  err->emit_message = emit_message;
+  err->output_message = output_message;
+  err->format_message = format_message;
+  err->reset_error_mgr = reset_error_mgr;
+
+  err->trace_level = 0;		/* default = no tracing */
+  err->num_warnings = 0;	/* no warnings emitted yet */
+  err->msg_code = 0;		/* may be useful as a flag for "no error" */
+
+  /* Initialize message table pointers */
+  err->jpeg_message_table = jpeg_std_message_table;
+  err->last_jpeg_message = (int) JMSG_LASTMSGCODE - 1;
+
+  err->addon_message_table = NULL;
+  err->first_addon_message = 0;	/* for safety */
+  err->last_addon_message = 0;
+
+  return err;
+}
diff --git a/common/jpeg/jerror.h b/common/jpeg/jerror.h
new file mode 100644
index 00000000..fc2fffea
--- /dev/null
+++ b/common/jpeg/jerror.h
@@ -0,0 +1,291 @@
+/*
+ * jerror.h
+ *
+ * Copyright (C) 1994-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file defines the error and message codes for the JPEG library.
+ * Edit this file to add new codes, or to translate the message strings to
+ * some other language.
+ * A set of error-reporting macros are defined too.  Some applications using
+ * the JPEG library may wish to include this file to get the error codes
+ * and/or the macros.
+ */
+
+/*
+ * To define the enum list of message codes, include this file without
+ * defining macro JMESSAGE.  To create a message string table, include it
+ * again with a suitable JMESSAGE definition (see jerror.c for an example).
+ */
+#ifndef JMESSAGE
+#ifndef JERROR_H
+/* First time through, define the enum list */
+#define JMAKE_ENUM_LIST
+#else
+/* Repeated inclusions of this file are no-ops unless JMESSAGE is defined */
+#define JMESSAGE(code,string)
+#endif /* JERROR_H */
+#endif /* JMESSAGE */
+
+#ifdef JMAKE_ENUM_LIST
+
+typedef enum {
+
+#define JMESSAGE(code,string)	code ,
+
+#endif /* JMAKE_ENUM_LIST */
+
+JMESSAGE(JMSG_NOMESSAGE, "Bogus message code %d") /* Must be first entry! */
+
+/* For maintenance convenience, list is alphabetical by message code name */
+JMESSAGE(JERR_ARITH_NOTIMPL,
+	 "Sorry, there are legal restrictions on arithmetic coding")
+JMESSAGE(JERR_BAD_ALIGN_TYPE, "ALIGN_TYPE is wrong, please fix")
+JMESSAGE(JERR_BAD_ALLOC_CHUNK, "MAX_ALLOC_CHUNK is wrong, please fix")
+JMESSAGE(JERR_BAD_BUFFER_MODE, "Bogus buffer control mode")
+JMESSAGE(JERR_BAD_COMPONENT_ID, "Invalid component ID %d in SOS")
+JMESSAGE(JERR_BAD_DCT_COEF, "DCT coefficient out of range")
+JMESSAGE(JERR_BAD_DCTSIZE, "IDCT output block size %d not supported")
+JMESSAGE(JERR_BAD_HUFF_TABLE, "Bogus Huffman table definition")
+JMESSAGE(JERR_BAD_IN_COLORSPACE, "Bogus input colorspace")
+JMESSAGE(JERR_BAD_J_COLORSPACE, "Bogus JPEG colorspace")
+JMESSAGE(JERR_BAD_LENGTH, "Bogus marker length")
+JMESSAGE(JERR_BAD_LIB_VERSION,
+	 "Wrong JPEG library version: library is %d, caller expects %d")
+JMESSAGE(JERR_BAD_MCU_SIZE, "Sampling factors too large for interleaved scan")
+JMESSAGE(JERR_BAD_POOL_ID, "Invalid memory pool code %d")
+JMESSAGE(JERR_BAD_PRECISION, "Unsupported JPEG data precision %d")
+JMESSAGE(JERR_BAD_PROGRESSION,
+	 "Invalid progressive parameters Ss=%d Se=%d Ah=%d Al=%d")
+JMESSAGE(JERR_BAD_PROG_SCRIPT,
+	 "Invalid progressive parameters at scan script entry %d")
+JMESSAGE(JERR_BAD_SAMPLING, "Bogus sampling factors")
+JMESSAGE(JERR_BAD_SCAN_SCRIPT, "Invalid scan script at entry %d")
+JMESSAGE(JERR_BAD_STATE, "Improper call to JPEG library in state %d")
+JMESSAGE(JERR_BAD_STRUCT_SIZE,
+	 "JPEG parameter struct mismatch: library thinks size is %u, caller expects %u")
+JMESSAGE(JERR_BAD_VIRTUAL_ACCESS, "Bogus virtual array access")
+JMESSAGE(JERR_BUFFER_SIZE, "Buffer passed to JPEG library is too small")
+JMESSAGE(JERR_CANT_SUSPEND, "Suspension not allowed here")
+JMESSAGE(JERR_CCIR601_NOTIMPL, "CCIR601 sampling not implemented yet")
+JMESSAGE(JERR_COMPONENT_COUNT, "Too many color components: %d, max %d")
+JMESSAGE(JERR_CONVERSION_NOTIMPL, "Unsupported color conversion request")
+JMESSAGE(JERR_DAC_INDEX, "Bogus DAC index %d")
+JMESSAGE(JERR_DAC_VALUE, "Bogus DAC value 0x%x")
+JMESSAGE(JERR_DHT_INDEX, "Bogus DHT index %d")
+JMESSAGE(JERR_DQT_INDEX, "Bogus DQT index %d")
+JMESSAGE(JERR_EMPTY_IMAGE, "Empty JPEG image (DNL not supported)")
+JMESSAGE(JERR_EMS_READ, "Read from EMS failed")
+JMESSAGE(JERR_EMS_WRITE, "Write to EMS failed")
+JMESSAGE(JERR_EOI_EXPECTED, "Didn't expect more than one scan")
+JMESSAGE(JERR_FILE_READ, "Input file read error")
+JMESSAGE(JERR_FILE_WRITE, "Output file write error --- out of disk space?")
+JMESSAGE(JERR_FRACT_SAMPLE_NOTIMPL, "Fractional sampling not implemented yet")
+JMESSAGE(JERR_HUFF_CLEN_OVERFLOW, "Huffman code size table overflow")
+JMESSAGE(JERR_HUFF_MISSING_CODE, "Missing Huffman code table entry")
+JMESSAGE(JERR_IMAGE_TOO_BIG, "Maximum supported image dimension is %u pixels")
+JMESSAGE(JERR_INPUT_EMPTY, "Empty input file")
+JMESSAGE(JERR_INPUT_EOF, "Premature end of input file")
+JMESSAGE(JERR_MISMATCHED_QUANT_TABLE,
+	 "Cannot transcode due to multiple use of quantization table %d")
+JMESSAGE(JERR_MISSING_DATA, "Scan script does not transmit all data")
+JMESSAGE(JERR_MODE_CHANGE, "Invalid color quantization mode change")
+JMESSAGE(JERR_NOTIMPL, "Not implemented yet")
+JMESSAGE(JERR_NOT_COMPILED, "Requested feature was omitted at compile time")
+JMESSAGE(JERR_NO_BACKING_STORE, "Backing store not supported")
+JMESSAGE(JERR_NO_HUFF_TABLE, "Huffman table 0x%02x was not defined")
+JMESSAGE(JERR_NO_IMAGE, "JPEG datastream contains no image")
+JMESSAGE(JERR_NO_QUANT_TABLE, "Quantization table 0x%02x was not defined")
+JMESSAGE(JERR_NO_SOI, "Not a JPEG file: starts with 0x%02x 0x%02x")
+JMESSAGE(JERR_OUT_OF_MEMORY, "Insufficient memory (case %d)")
+JMESSAGE(JERR_QUANT_COMPONENTS,
+	 "Cannot quantize more than %d color components")
+JMESSAGE(JERR_QUANT_FEW_COLORS, "Cannot quantize to fewer than %d colors")
+JMESSAGE(JERR_QUANT_MANY_COLORS, "Cannot quantize to more than %d colors")
+JMESSAGE(JERR_SOF_DUPLICATE, "Invalid JPEG file structure: two SOF markers")
+JMESSAGE(JERR_SOF_NO_SOS, "Invalid JPEG file structure: missing SOS marker")
+JMESSAGE(JERR_SOF_UNSUPPORTED, "Unsupported JPEG process: SOF type 0x%02x")
+JMESSAGE(JERR_SOI_DUPLICATE, "Invalid JPEG file structure: two SOI markers")
+JMESSAGE(JERR_SOS_NO_SOF, "Invalid JPEG file structure: SOS before SOF")
+JMESSAGE(JERR_TFILE_CREATE, "Failed to create temporary file %s")
+JMESSAGE(JERR_TFILE_READ, "Read failed on temporary file")
+JMESSAGE(JERR_TFILE_SEEK, "Seek failed on temporary file")
+JMESSAGE(JERR_TFILE_WRITE,
+	 "Write failed on temporary file --- out of disk space?")
+JMESSAGE(JERR_TOO_LITTLE_DATA, "Application transferred too few scanlines")
+JMESSAGE(JERR_UNKNOWN_MARKER, "Unsupported marker type 0x%02x")
+JMESSAGE(JERR_VIRTUAL_BUG, "Virtual array controller messed up")
+JMESSAGE(JERR_WIDTH_OVERFLOW, "Image too wide for this implementation")
+JMESSAGE(JERR_XMS_READ, "Read from XMS failed")
+JMESSAGE(JERR_XMS_WRITE, "Write to XMS failed")
+JMESSAGE(JMSG_COPYRIGHT, JCOPYRIGHT)
+JMESSAGE(JMSG_VERSION, JVERSION)
+JMESSAGE(JTRC_16BIT_TABLES,
+	 "Caution: quantization tables are too coarse for baseline JPEG")
+JMESSAGE(JTRC_ADOBE,
+	 "Adobe APP14 marker: version %d, flags 0x%04x 0x%04x, transform %d")
+JMESSAGE(JTRC_APP0, "Unknown APP0 marker (not JFIF), length %u")
+JMESSAGE(JTRC_APP14, "Unknown APP14 marker (not Adobe), length %u")
+JMESSAGE(JTRC_DAC, "Define Arithmetic Table 0x%02x: 0x%02x")
+JMESSAGE(JTRC_DHT, "Define Huffman Table 0x%02x")
+JMESSAGE(JTRC_DQT, "Define Quantization Table %d  precision %d")
+JMESSAGE(JTRC_DRI, "Define Restart Interval %u")
+JMESSAGE(JTRC_EMS_CLOSE, "Freed EMS handle %u")
+JMESSAGE(JTRC_EMS_OPEN, "Obtained EMS handle %u")
+JMESSAGE(JTRC_EOI, "End Of Image")
+JMESSAGE(JTRC_HUFFBITS, "        %3d %3d %3d %3d %3d %3d %3d %3d")
+JMESSAGE(JTRC_JFIF, "JFIF APP0 marker: version %d.%02d, density %dx%d  %d")
+JMESSAGE(JTRC_JFIF_BADTHUMBNAILSIZE,
+	 "Warning: thumbnail image size does not match data length %u")
+JMESSAGE(JTRC_JFIF_EXTENSION,
+	 "JFIF extension marker: type 0x%02x, length %u")
+JMESSAGE(JTRC_JFIF_THUMBNAIL, "    with %d x %d thumbnail image")
+JMESSAGE(JTRC_MISC_MARKER, "Miscellaneous marker 0x%02x, length %u")
+JMESSAGE(JTRC_PARMLESS_MARKER, "Unexpected marker 0x%02x")
+JMESSAGE(JTRC_QUANTVALS, "        %4u %4u %4u %4u %4u %4u %4u %4u")
+JMESSAGE(JTRC_QUANT_3_NCOLORS, "Quantizing to %d = %d*%d*%d colors")
+JMESSAGE(JTRC_QUANT_NCOLORS, "Quantizing to %d colors")
+JMESSAGE(JTRC_QUANT_SELECTED, "Selected %d colors for quantization")
+JMESSAGE(JTRC_RECOVERY_ACTION, "At marker 0x%02x, recovery action %d")
+JMESSAGE(JTRC_RST, "RST%d")
+JMESSAGE(JTRC_SMOOTH_NOTIMPL,
+	 "Smoothing not supported with nonstandard sampling ratios")
+JMESSAGE(JTRC_SOF, "Start Of Frame 0x%02x: width=%u, height=%u, components=%d")
+JMESSAGE(JTRC_SOF_COMPONENT, "    Component %d: %dhx%dv q=%d")
+JMESSAGE(JTRC_SOI, "Start of Image")
+JMESSAGE(JTRC_SOS, "Start Of Scan: %d components")
+JMESSAGE(JTRC_SOS_COMPONENT, "    Component %d: dc=%d ac=%d")
+JMESSAGE(JTRC_SOS_PARAMS, "  Ss=%d, Se=%d, Ah=%d, Al=%d")
+JMESSAGE(JTRC_TFILE_CLOSE, "Closed temporary file %s")
+JMESSAGE(JTRC_TFILE_OPEN, "Opened temporary file %s")
+JMESSAGE(JTRC_THUMB_JPEG,
+	 "JFIF extension marker: JPEG-compressed thumbnail image, length %u")
+JMESSAGE(JTRC_THUMB_PALETTE,
+	 "JFIF extension marker: palette thumbnail image, length %u")
+JMESSAGE(JTRC_THUMB_RGB,
+	 "JFIF extension marker: RGB thumbnail image, length %u")
+JMESSAGE(JTRC_UNKNOWN_IDS,
+	 "Unrecognized component IDs %d %d %d, assuming YCbCr")
+JMESSAGE(JTRC_XMS_CLOSE, "Freed XMS handle %u")
+JMESSAGE(JTRC_XMS_OPEN, "Obtained XMS handle %u")
+JMESSAGE(JWRN_ADOBE_XFORM, "Unknown Adobe color transform code %d")
+JMESSAGE(JWRN_BOGUS_PROGRESSION,
+	 "Inconsistent progression sequence for component %d coefficient %d")
+JMESSAGE(JWRN_EXTRANEOUS_DATA,
+	 "Corrupt JPEG data: %u extraneous bytes before marker 0x%02x")
+JMESSAGE(JWRN_HIT_MARKER, "Corrupt JPEG data: premature end of data segment")
+JMESSAGE(JWRN_HUFF_BAD_CODE, "Corrupt JPEG data: bad Huffman code")
+JMESSAGE(JWRN_JFIF_MAJOR, "Warning: unknown JFIF revision number %d.%02d")
+JMESSAGE(JWRN_JPEG_EOF, "Premature end of JPEG file")
+JMESSAGE(JWRN_MUST_RESYNC,
+	 "Corrupt JPEG data: found marker 0x%02x instead of RST%d")
+JMESSAGE(JWRN_NOT_SEQUENTIAL, "Invalid SOS parameters for sequential JPEG")
+JMESSAGE(JWRN_TOO_MUCH_DATA, "Application transferred too many scanlines")
+
+#ifdef JMAKE_ENUM_LIST
+
+  JMSG_LASTMSGCODE
+} J_MESSAGE_CODE;
+
+#undef JMAKE_ENUM_LIST
+#endif /* JMAKE_ENUM_LIST */
+
+/* Zap JMESSAGE macro so that future re-inclusions do nothing by default */
+#undef JMESSAGE
+
+
+#ifndef JERROR_H
+#define JERROR_H
+
+/* Macros to simplify using the error and trace message stuff */
+/* The first parameter is either type of cinfo pointer */
+
+/* Fatal errors (print message and exit) */
+#define ERREXIT(cinfo,code)  \
+  ((cinfo)->err->msg_code = (code), \
+   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
+#define ERREXIT1(cinfo,code,p1)  \
+  ((cinfo)->err->msg_code = (code), \
+   (cinfo)->err->msg_parm.i[0] = (p1), \
+   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
+#define ERREXIT2(cinfo,code,p1,p2)  \
+  ((cinfo)->err->msg_code = (code), \
+   (cinfo)->err->msg_parm.i[0] = (p1), \
+   (cinfo)->err->msg_parm.i[1] = (p2), \
+   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
+#define ERREXIT3(cinfo,code,p1,p2,p3)  \
+  ((cinfo)->err->msg_code = (code), \
+   (cinfo)->err->msg_parm.i[0] = (p1), \
+   (cinfo)->err->msg_parm.i[1] = (p2), \
+   (cinfo)->err->msg_parm.i[2] = (p3), \
+   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
+#define ERREXIT4(cinfo,code,p1,p2,p3,p4)  \
+  ((cinfo)->err->msg_code = (code), \
+   (cinfo)->err->msg_parm.i[0] = (p1), \
+   (cinfo)->err->msg_parm.i[1] = (p2), \
+   (cinfo)->err->msg_parm.i[2] = (p3), \
+   (cinfo)->err->msg_parm.i[3] = (p4), \
+   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
+#define ERREXITS(cinfo,code,str)  \
+  ((cinfo)->err->msg_code = (code), \
+   strncpy((cinfo)->err->msg_parm.s, (str), JMSG_STR_PARM_MAX), \
+   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
+
+#define MAKESTMT(stuff)		do { stuff } while (0)
+
+/* Nonfatal errors (we can keep going, but the data is probably corrupt) */
+#define WARNMS(cinfo,code)  \
+  ((cinfo)->err->msg_code = (code), \
+   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
+#define WARNMS1(cinfo,code,p1)  \
+  ((cinfo)->err->msg_code = (code), \
+   (cinfo)->err->msg_parm.i[0] = (p1), \
+   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
+#define WARNMS2(cinfo,code,p1,p2)  \
+  ((cinfo)->err->msg_code = (code), \
+   (cinfo)->err->msg_parm.i[0] = (p1), \
+   (cinfo)->err->msg_parm.i[1] = (p2), \
+   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
+
+/* Informational/debugging messages */
+#define TRACEMS(cinfo,lvl,code)  \
+  ((cinfo)->err->msg_code = (code), \
+   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
+#define TRACEMS1(cinfo,lvl,code,p1)  \
+  ((cinfo)->err->msg_code = (code), \
+   (cinfo)->err->msg_parm.i[0] = (p1), \
+   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
+#define TRACEMS2(cinfo,lvl,code,p1,p2)  \
+  ((cinfo)->err->msg_code = (code), \
+   (cinfo)->err->msg_parm.i[0] = (p1), \
+   (cinfo)->err->msg_parm.i[1] = (p2), \
+   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
+#define TRACEMS3(cinfo,lvl,code,p1,p2,p3)  \
+  MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
+	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); \
+	   (cinfo)->err->msg_code = (code); \
+	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
+#define TRACEMS4(cinfo,lvl,code,p1,p2,p3,p4)  \
+  MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
+	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
+	   (cinfo)->err->msg_code = (code); \
+	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
+#define TRACEMS5(cinfo,lvl,code,p1,p2,p3,p4,p5)  \
+  MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
+	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
+	   _mp[4] = (p5); \
+	   (cinfo)->err->msg_code = (code); \
+	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
+#define TRACEMS8(cinfo,lvl,code,p1,p2,p3,p4,p5,p6,p7,p8)  \
+  MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
+	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
+	   _mp[4] = (p5); _mp[5] = (p6); _mp[6] = (p7); _mp[7] = (p8); \
+	   (cinfo)->err->msg_code = (code); \
+	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
+#define TRACEMSS(cinfo,lvl,code,str)  \
+  ((cinfo)->err->msg_code = (code), \
+   strncpy((cinfo)->err->msg_parm.s, (str), JMSG_STR_PARM_MAX), \
+   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
+
+#endif /* JERROR_H */
diff --git a/common/jpeg/jfdctflt.c b/common/jpeg/jfdctflt.c
new file mode 100644
index 00000000..79d7a007
--- /dev/null
+++ b/common/jpeg/jfdctflt.c
@@ -0,0 +1,168 @@
+/*
+ * jfdctflt.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains a floating-point implementation of the
+ * forward DCT (Discrete Cosine Transform).
+ *
+ * This implementation should be more accurate than either of the integer
+ * DCT implementations.  However, it may not give the same results on all
+ * machines because of differences in roundoff behavior.  Speed will depend
+ * on the hardware's floating point capacity.
+ *
+ * A 2-D DCT can be done by 1-D DCT on each row followed by 1-D DCT
+ * on each column.  Direct algorithms are also available, but they are
+ * much more complex and seem not to be any faster when reduced to code.
+ *
+ * This implementation is based on Arai, Agui, and Nakajima's algorithm for
+ * scaled DCT.  Their original paper (Trans. IEICE E-71(11):1095) is in
+ * Japanese, but the algorithm is described in the Pennebaker & Mitchell
+ * JPEG textbook (see REFERENCES section in file README).  The following code
+ * is based directly on figure 4-8 in P&M.
+ * While an 8-point DCT cannot be done in less than 11 multiplies, it is
+ * possible to arrange the computation so that many of the multiplies are
+ * simple scalings of the final outputs.  These multiplies can then be
+ * folded into the multiplications or divisions by the JPEG quantization
+ * table entries.  The AA&N method leaves only 5 multiplies and 29 adds
+ * to be done in the DCT itself.
+ * The primary disadvantage of this method is that with a fixed-point
+ * implementation, accuracy is lost due to imprecise representation of the
+ * scaled quantization values.  However, that problem does not arise if
+ * we use floating point arithmetic.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+#ifdef DCT_FLOAT_SUPPORTED
+
+
+/*
+ * This module is specialized to the case DCTSIZE = 8.
+ */
+
+#if DCTSIZE != 8
+  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
+#endif
+
+
+/*
+ * Perform the forward DCT on one block of samples.
+ */
+
+GLOBAL(void)
+jpeg_fdct_float (FAST_FLOAT * data)
+{
+  FAST_FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  FAST_FLOAT tmp10, tmp11, tmp12, tmp13;
+  FAST_FLOAT z1, z2, z3, z4, z5, z11, z13;
+  FAST_FLOAT *dataptr;
+  int ctr;
+
+  /* Pass 1: process rows. */
+
+  dataptr = data;
+  for (ctr = DCTSIZE-1; ctr >= 0; ctr--) {
+    tmp0 = dataptr[0] + dataptr[7];
+    tmp7 = dataptr[0] - dataptr[7];
+    tmp1 = dataptr[1] + dataptr[6];
+    tmp6 = dataptr[1] - dataptr[6];
+    tmp2 = dataptr[2] + dataptr[5];
+    tmp5 = dataptr[2] - dataptr[5];
+    tmp3 = dataptr[3] + dataptr[4];
+    tmp4 = dataptr[3] - dataptr[4];
+    
+    /* Even part */
+    
+    tmp10 = tmp0 + tmp3;	/* phase 2 */
+    tmp13 = tmp0 - tmp3;
+    tmp11 = tmp1 + tmp2;
+    tmp12 = tmp1 - tmp2;
+    
+    dataptr[0] = tmp10 + tmp11; /* phase 3 */
+    dataptr[4] = tmp10 - tmp11;
+    
+    z1 = (tmp12 + tmp13) * ((FAST_FLOAT) 0.707106781); /* c4 */
+    dataptr[2] = tmp13 + z1;	/* phase 5 */
+    dataptr[6] = tmp13 - z1;
+    
+    /* Odd part */
+
+    tmp10 = tmp4 + tmp5;	/* phase 2 */
+    tmp11 = tmp5 + tmp6;
+    tmp12 = tmp6 + tmp7;
+
+    /* The rotator is modified from fig 4-8 to avoid extra negations. */
+    z5 = (tmp10 - tmp12) * ((FAST_FLOAT) 0.382683433); /* c6 */
+    z2 = ((FAST_FLOAT) 0.541196100) * tmp10 + z5; /* c2-c6 */
+    z4 = ((FAST_FLOAT) 1.306562965) * tmp12 + z5; /* c2+c6 */
+    z3 = tmp11 * ((FAST_FLOAT) 0.707106781); /* c4 */
+
+    z11 = tmp7 + z3;		/* phase 5 */
+    z13 = tmp7 - z3;
+
+    dataptr[5] = z13 + z2;	/* phase 6 */
+    dataptr[3] = z13 - z2;
+    dataptr[1] = z11 + z4;
+    dataptr[7] = z11 - z4;
+
+    dataptr += DCTSIZE;		/* advance pointer to next row */
+  }
+
+  /* Pass 2: process columns. */
+
+  dataptr = data;
+  for (ctr = DCTSIZE-1; ctr >= 0; ctr--) {
+    tmp0 = dataptr[DCTSIZE*0] + dataptr[DCTSIZE*7];
+    tmp7 = dataptr[DCTSIZE*0] - dataptr[DCTSIZE*7];
+    tmp1 = dataptr[DCTSIZE*1] + dataptr[DCTSIZE*6];
+    tmp6 = dataptr[DCTSIZE*1] - dataptr[DCTSIZE*6];
+    tmp2 = dataptr[DCTSIZE*2] + dataptr[DCTSIZE*5];
+    tmp5 = dataptr[DCTSIZE*2] - dataptr[DCTSIZE*5];
+    tmp3 = dataptr[DCTSIZE*3] + dataptr[DCTSIZE*4];
+    tmp4 = dataptr[DCTSIZE*3] - dataptr[DCTSIZE*4];
+    
+    /* Even part */
+    
+    tmp10 = tmp0 + tmp3;	/* phase 2 */
+    tmp13 = tmp0 - tmp3;
+    tmp11 = tmp1 + tmp2;
+    tmp12 = tmp1 - tmp2;
+    
+    dataptr[DCTSIZE*0] = tmp10 + tmp11; /* phase 3 */
+    dataptr[DCTSIZE*4] = tmp10 - tmp11;
+    
+    z1 = (tmp12 + tmp13) * ((FAST_FLOAT) 0.707106781); /* c4 */
+    dataptr[DCTSIZE*2] = tmp13 + z1; /* phase 5 */
+    dataptr[DCTSIZE*6] = tmp13 - z1;
+    
+    /* Odd part */
+
+    tmp10 = tmp4 + tmp5;	/* phase 2 */
+    tmp11 = tmp5 + tmp6;
+    tmp12 = tmp6 + tmp7;
+
+    /* The rotator is modified from fig 4-8 to avoid extra negations. */
+    z5 = (tmp10 - tmp12) * ((FAST_FLOAT) 0.382683433); /* c6 */
+    z2 = ((FAST_FLOAT) 0.541196100) * tmp10 + z5; /* c2-c6 */
+    z4 = ((FAST_FLOAT) 1.306562965) * tmp12 + z5; /* c2+c6 */
+    z3 = tmp11 * ((FAST_FLOAT) 0.707106781); /* c4 */
+
+    z11 = tmp7 + z3;		/* phase 5 */
+    z13 = tmp7 - z3;
+
+    dataptr[DCTSIZE*5] = z13 + z2; /* phase 6 */
+    dataptr[DCTSIZE*3] = z13 - z2;
+    dataptr[DCTSIZE*1] = z11 + z4;
+    dataptr[DCTSIZE*7] = z11 - z4;
+
+    dataptr++;			/* advance pointer to next column */
+  }
+}
+
+#endif /* DCT_FLOAT_SUPPORTED */
diff --git a/common/jpeg/jfdctfst.c b/common/jpeg/jfdctfst.c
new file mode 100644
index 00000000..ccb378a3
--- /dev/null
+++ b/common/jpeg/jfdctfst.c
@@ -0,0 +1,224 @@
+/*
+ * jfdctfst.c
+ *
+ * Copyright (C) 1994-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains a fast, not so accurate integer implementation of the
+ * forward DCT (Discrete Cosine Transform).
+ *
+ * A 2-D DCT can be done by 1-D DCT on each row followed by 1-D DCT
+ * on each column.  Direct algorithms are also available, but they are
+ * much more complex and seem not to be any faster when reduced to code.
+ *
+ * This implementation is based on Arai, Agui, and Nakajima's algorithm for
+ * scaled DCT.  Their original paper (Trans. IEICE E-71(11):1095) is in
+ * Japanese, but the algorithm is described in the Pennebaker & Mitchell
+ * JPEG textbook (see REFERENCES section in file README).  The following code
+ * is based directly on figure 4-8 in P&M.
+ * While an 8-point DCT cannot be done in less than 11 multiplies, it is
+ * possible to arrange the computation so that many of the multiplies are
+ * simple scalings of the final outputs.  These multiplies can then be
+ * folded into the multiplications or divisions by the JPEG quantization
+ * table entries.  The AA&N method leaves only 5 multiplies and 29 adds
+ * to be done in the DCT itself.
+ * The primary disadvantage of this method is that with fixed-point math,
+ * accuracy is lost due to imprecise representation of the scaled
+ * quantization values.  The smaller the quantization table entry, the less
+ * precise the scaled value, so this implementation does worse with high-
+ * quality-setting files than with low-quality ones.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+#ifdef DCT_IFAST_SUPPORTED
+
+
+/*
+ * This module is specialized to the case DCTSIZE = 8.
+ */
+
+#if DCTSIZE != 8
+  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
+#endif
+
+
+/* Scaling decisions are generally the same as in the LL&M algorithm;
+ * see jfdctint.c for more details.  However, we choose to descale
+ * (right shift) multiplication products as soon as they are formed,
+ * rather than carrying additional fractional bits into subsequent additions.
+ * This compromises accuracy slightly, but it lets us save a few shifts.
+ * More importantly, 16-bit arithmetic is then adequate (for 8-bit samples)
+ * everywhere except in the multiplications proper; this saves a good deal
+ * of work on 16-bit-int machines.
+ *
+ * Again to save a few shifts, the intermediate results between pass 1 and
+ * pass 2 are not upscaled, but are represented only to integral precision.
+ *
+ * A final compromise is to represent the multiplicative constants to only
+ * 8 fractional bits, rather than 13.  This saves some shifting work on some
+ * machines, and may also reduce the cost of multiplication (since there
+ * are fewer one-bits in the constants).
+ */
+
+#define CONST_BITS  8
+
+
+/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
+ * causing a lot of useless floating-point operations at run time.
+ * To get around this we use the following pre-calculated constants.
+ * If you change CONST_BITS you may want to add appropriate values.
+ * (With a reasonable C compiler, you can just rely on the FIX() macro...)
+ */
+
+#if CONST_BITS == 8
+#define FIX_0_382683433  ((INT32)   98)		/* FIX(0.382683433) */
+#define FIX_0_541196100  ((INT32)  139)		/* FIX(0.541196100) */
+#define FIX_0_707106781  ((INT32)  181)		/* FIX(0.707106781) */
+#define FIX_1_306562965  ((INT32)  334)		/* FIX(1.306562965) */
+#else
+#define FIX_0_382683433  FIX(0.382683433)
+#define FIX_0_541196100  FIX(0.541196100)
+#define FIX_0_707106781  FIX(0.707106781)
+#define FIX_1_306562965  FIX(1.306562965)
+#endif
+
+
+/* We can gain a little more speed, with a further compromise in accuracy,
+ * by omitting the addition in a descaling shift.  This yields an incorrectly
+ * rounded result half the time...
+ */
+
+#ifndef USE_ACCURATE_ROUNDING
+#undef DESCALE
+#define DESCALE(x,n)  RIGHT_SHIFT(x, n)
+#endif
+
+
+/* Multiply a DCTELEM variable by an INT32 constant, and immediately
+ * descale to yield a DCTELEM result.
+ */
+
+#define MULTIPLY(var,const)  ((DCTELEM) DESCALE((var) * (const), CONST_BITS))
+
+
+/*
+ * Perform the forward DCT on one block of samples.
+ */
+
+GLOBAL(void)
+jpeg_fdct_ifast (DCTELEM * data)
+{
+  DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  DCTELEM tmp10, tmp11, tmp12, tmp13;
+  DCTELEM z1, z2, z3, z4, z5, z11, z13;
+  DCTELEM *dataptr;
+  int ctr;
+  SHIFT_TEMPS
+
+  /* Pass 1: process rows. */
+
+  dataptr = data;
+  for (ctr = DCTSIZE-1; ctr >= 0; ctr--) {
+    tmp0 = dataptr[0] + dataptr[7];
+    tmp7 = dataptr[0] - dataptr[7];
+    tmp1 = dataptr[1] + dataptr[6];
+    tmp6 = dataptr[1] - dataptr[6];
+    tmp2 = dataptr[2] + dataptr[5];
+    tmp5 = dataptr[2] - dataptr[5];
+    tmp3 = dataptr[3] + dataptr[4];
+    tmp4 = dataptr[3] - dataptr[4];
+    
+    /* Even part */
+    
+    tmp10 = tmp0 + tmp3;	/* phase 2 */
+    tmp13 = tmp0 - tmp3;
+    tmp11 = tmp1 + tmp2;
+    tmp12 = tmp1 - tmp2;
+    
+    dataptr[0] = tmp10 + tmp11; /* phase 3 */
+    dataptr[4] = tmp10 - tmp11;
+    
+    z1 = MULTIPLY(tmp12 + tmp13, FIX_0_707106781); /* c4 */
+    dataptr[2] = tmp13 + z1;	/* phase 5 */
+    dataptr[6] = tmp13 - z1;
+    
+    /* Odd part */
+
+    tmp10 = tmp4 + tmp5;	/* phase 2 */
+    tmp11 = tmp5 + tmp6;
+    tmp12 = tmp6 + tmp7;
+
+    /* The rotator is modified from fig 4-8 to avoid extra negations. */
+    z5 = MULTIPLY(tmp10 - tmp12, FIX_0_382683433); /* c6 */
+    z2 = MULTIPLY(tmp10, FIX_0_541196100) + z5; /* c2-c6 */
+    z4 = MULTIPLY(tmp12, FIX_1_306562965) + z5; /* c2+c6 */
+    z3 = MULTIPLY(tmp11, FIX_0_707106781); /* c4 */
+
+    z11 = tmp7 + z3;		/* phase 5 */
+    z13 = tmp7 - z3;
+
+    dataptr[5] = z13 + z2;	/* phase 6 */
+    dataptr[3] = z13 - z2;
+    dataptr[1] = z11 + z4;
+    dataptr[7] = z11 - z4;
+
+    dataptr += DCTSIZE;		/* advance pointer to next row */
+  }
+
+  /* Pass 2: process columns. */
+
+  dataptr = data;
+  for (ctr = DCTSIZE-1; ctr >= 0; ctr--) {
+    tmp0 = dataptr[DCTSIZE*0] + dataptr[DCTSIZE*7];
+    tmp7 = dataptr[DCTSIZE*0] - dataptr[DCTSIZE*7];
+    tmp1 = dataptr[DCTSIZE*1] + dataptr[DCTSIZE*6];
+    tmp6 = dataptr[DCTSIZE*1] - dataptr[DCTSIZE*6];
+    tmp2 = dataptr[DCTSIZE*2] + dataptr[DCTSIZE*5];
+    tmp5 = dataptr[DCTSIZE*2] - dataptr[DCTSIZE*5];
+    tmp3 = dataptr[DCTSIZE*3] + dataptr[DCTSIZE*4];
+    tmp4 = dataptr[DCTSIZE*3] - dataptr[DCTSIZE*4];
+    
+    /* Even part */
+    
+    tmp10 = tmp0 + tmp3;	/* phase 2 */
+    tmp13 = tmp0 - tmp3;
+    tmp11 = tmp1 + tmp2;
+    tmp12 = tmp1 - tmp2;
+    
+    dataptr[DCTSIZE*0] = tmp10 + tmp11; /* phase 3 */
+    dataptr[DCTSIZE*4] = tmp10 - tmp11;
+    
+    z1 = MULTIPLY(tmp12 + tmp13, FIX_0_707106781); /* c4 */
+    dataptr[DCTSIZE*2] = tmp13 + z1; /* phase 5 */
+    dataptr[DCTSIZE*6] = tmp13 - z1;
+    
+    /* Odd part */
+
+    tmp10 = tmp4 + tmp5;	/* phase 2 */
+    tmp11 = tmp5 + tmp6;
+    tmp12 = tmp6 + tmp7;
+
+    /* The rotator is modified from fig 4-8 to avoid extra negations. */
+    z5 = MULTIPLY(tmp10 - tmp12, FIX_0_382683433); /* c6 */
+    z2 = MULTIPLY(tmp10, FIX_0_541196100) + z5; /* c2-c6 */
+    z4 = MULTIPLY(tmp12, FIX_1_306562965) + z5; /* c2+c6 */
+    z3 = MULTIPLY(tmp11, FIX_0_707106781); /* c4 */
+
+    z11 = tmp7 + z3;		/* phase 5 */
+    z13 = tmp7 - z3;
+
+    dataptr[DCTSIZE*5] = z13 + z2; /* phase 6 */
+    dataptr[DCTSIZE*3] = z13 - z2;
+    dataptr[DCTSIZE*1] = z11 + z4;
+    dataptr[DCTSIZE*7] = z11 - z4;
+
+    dataptr++;			/* advance pointer to next column */
+  }
+}
+
+#endif /* DCT_IFAST_SUPPORTED */
diff --git a/common/jpeg/jfdctint.c b/common/jpeg/jfdctint.c
new file mode 100644
index 00000000..0a78b64a
--- /dev/null
+++ b/common/jpeg/jfdctint.c
@@ -0,0 +1,283 @@
+/*
+ * jfdctint.c
+ *
+ * Copyright (C) 1991-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains a slow-but-accurate integer implementation of the
+ * forward DCT (Discrete Cosine Transform).
+ *
+ * A 2-D DCT can be done by 1-D DCT on each row followed by 1-D DCT
+ * on each column.  Direct algorithms are also available, but they are
+ * much more complex and seem not to be any faster when reduced to code.
+ *
+ * This implementation is based on an algorithm described in
+ *   C. Loeffler, A. Ligtenberg and G. Moschytz, "Practical Fast 1-D DCT
+ *   Algorithms with 11 Multiplications", Proc. Int'l. Conf. on Acoustics,
+ *   Speech, and Signal Processing 1989 (ICASSP '89), pp. 988-991.
+ * The primary algorithm described there uses 11 multiplies and 29 adds.
+ * We use their alternate method with 12 multiplies and 32 adds.
+ * The advantage of this method is that no data path contains more than one
+ * multiplication; this allows a very simple and accurate implementation in
+ * scaled fixed-point arithmetic, with a minimal number of shifts.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+#ifdef DCT_ISLOW_SUPPORTED
+
+
+/*
+ * This module is specialized to the case DCTSIZE = 8.
+ */
+
+#if DCTSIZE != 8
+  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
+#endif
+
+
+/*
+ * The poop on this scaling stuff is as follows:
+ *
+ * Each 1-D DCT step produces outputs which are a factor of sqrt(N)
+ * larger than the true DCT outputs.  The final outputs are therefore
+ * a factor of N larger than desired; since N=8 this can be cured by
+ * a simple right shift at the end of the algorithm.  The advantage of
+ * this arrangement is that we save two multiplications per 1-D DCT,
+ * because the y0 and y4 outputs need not be divided by sqrt(N).
+ * In the IJG code, this factor of 8 is removed by the quantization step
+ * (in jcdctmgr.c), NOT in this module.
+ *
+ * We have to do addition and subtraction of the integer inputs, which
+ * is no problem, and multiplication by fractional constants, which is
+ * a problem to do in integer arithmetic.  We multiply all the constants
+ * by CONST_SCALE and convert them to integer constants (thus retaining
+ * CONST_BITS bits of precision in the constants).  After doing a
+ * multiplication we have to divide the product by CONST_SCALE, with proper
+ * rounding, to produce the correct output.  This division can be done
+ * cheaply as a right shift of CONST_BITS bits.  We postpone shifting
+ * as long as possible so that partial sums can be added together with
+ * full fractional precision.
+ *
+ * The outputs of the first pass are scaled up by PASS1_BITS bits so that
+ * they are represented to better-than-integral precision.  These outputs
+ * require BITS_IN_JSAMPLE + PASS1_BITS + 3 bits; this fits in a 16-bit word
+ * with the recommended scaling.  (For 12-bit sample data, the intermediate
+ * array is INT32 anyway.)
+ *
+ * To avoid overflow of the 32-bit intermediate results in pass 2, we must
+ * have BITS_IN_JSAMPLE + CONST_BITS + PASS1_BITS <= 26.  Error analysis
+ * shows that the values given below are the most effective.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define CONST_BITS  13
+#define PASS1_BITS  2
+#else
+#define CONST_BITS  13
+#define PASS1_BITS  1		/* lose a little precision to avoid overflow */
+#endif
+
+/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
+ * causing a lot of useless floating-point operations at run time.
+ * To get around this we use the following pre-calculated constants.
+ * If you change CONST_BITS you may want to add appropriate values.
+ * (With a reasonable C compiler, you can just rely on the FIX() macro...)
+ */
+
+#if CONST_BITS == 13
+#define FIX_0_298631336  ((INT32)  2446)	/* FIX(0.298631336) */
+#define FIX_0_390180644  ((INT32)  3196)	/* FIX(0.390180644) */
+#define FIX_0_541196100  ((INT32)  4433)	/* FIX(0.541196100) */
+#define FIX_0_765366865  ((INT32)  6270)	/* FIX(0.765366865) */
+#define FIX_0_899976223  ((INT32)  7373)	/* FIX(0.899976223) */
+#define FIX_1_175875602  ((INT32)  9633)	/* FIX(1.175875602) */
+#define FIX_1_501321110  ((INT32)  12299)	/* FIX(1.501321110) */
+#define FIX_1_847759065  ((INT32)  15137)	/* FIX(1.847759065) */
+#define FIX_1_961570560  ((INT32)  16069)	/* FIX(1.961570560) */
+#define FIX_2_053119869  ((INT32)  16819)	/* FIX(2.053119869) */
+#define FIX_2_562915447  ((INT32)  20995)	/* FIX(2.562915447) */
+#define FIX_3_072711026  ((INT32)  25172)	/* FIX(3.072711026) */
+#else
+#define FIX_0_298631336  FIX(0.298631336)
+#define FIX_0_390180644  FIX(0.390180644)
+#define FIX_0_541196100  FIX(0.541196100)
+#define FIX_0_765366865  FIX(0.765366865)
+#define FIX_0_899976223  FIX(0.899976223)
+#define FIX_1_175875602  FIX(1.175875602)
+#define FIX_1_501321110  FIX(1.501321110)
+#define FIX_1_847759065  FIX(1.847759065)
+#define FIX_1_961570560  FIX(1.961570560)
+#define FIX_2_053119869  FIX(2.053119869)
+#define FIX_2_562915447  FIX(2.562915447)
+#define FIX_3_072711026  FIX(3.072711026)
+#endif
+
+
+/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
+ * For 8-bit samples with the recommended scaling, all the variable
+ * and constant values involved are no more than 16 bits wide, so a
+ * 16x16->32 bit multiply can be used instead of a full 32x32 multiply.
+ * For 12-bit samples, a full 32-bit multiplication will be needed.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define MULTIPLY(var,const)  MULTIPLY16C16(var,const)
+#else
+#define MULTIPLY(var,const)  ((var) * (const))
+#endif
+
+
+/*
+ * Perform the forward DCT on one block of samples.
+ */
+
+GLOBAL(void)
+jpeg_fdct_islow (DCTELEM * data)
+{
+  INT32 tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  INT32 tmp10, tmp11, tmp12, tmp13;
+  INT32 z1, z2, z3, z4, z5;
+  DCTELEM *dataptr;
+  int ctr;
+  SHIFT_TEMPS
+
+  /* Pass 1: process rows. */
+  /* Note results are scaled up by sqrt(8) compared to a true DCT; */
+  /* furthermore, we scale the results by 2**PASS1_BITS. */
+
+  dataptr = data;
+  for (ctr = DCTSIZE-1; ctr >= 0; ctr--) {
+    tmp0 = dataptr[0] + dataptr[7];
+    tmp7 = dataptr[0] - dataptr[7];
+    tmp1 = dataptr[1] + dataptr[6];
+    tmp6 = dataptr[1] - dataptr[6];
+    tmp2 = dataptr[2] + dataptr[5];
+    tmp5 = dataptr[2] - dataptr[5];
+    tmp3 = dataptr[3] + dataptr[4];
+    tmp4 = dataptr[3] - dataptr[4];
+    
+    /* Even part per LL&M figure 1 --- note that published figure is faulty;
+     * rotator "sqrt(2)*c1" should be "sqrt(2)*c6".
+     */
+    
+    tmp10 = tmp0 + tmp3;
+    tmp13 = tmp0 - tmp3;
+    tmp11 = tmp1 + tmp2;
+    tmp12 = tmp1 - tmp2;
+    
+    dataptr[0] = (DCTELEM) ((tmp10 + tmp11) << PASS1_BITS);
+    dataptr[4] = (DCTELEM) ((tmp10 - tmp11) << PASS1_BITS);
+    
+    z1 = MULTIPLY(tmp12 + tmp13, FIX_0_541196100);
+    dataptr[2] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp13, FIX_0_765366865),
+				   CONST_BITS-PASS1_BITS);
+    dataptr[6] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp12, - FIX_1_847759065),
+				   CONST_BITS-PASS1_BITS);
+    
+    /* Odd part per figure 8 --- note paper omits factor of sqrt(2).
+     * cK represents cos(K*pi/16).
+     * i0..i3 in the paper are tmp4..tmp7 here.
+     */
+    
+    z1 = tmp4 + tmp7;
+    z2 = tmp5 + tmp6;
+    z3 = tmp4 + tmp6;
+    z4 = tmp5 + tmp7;
+    z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
+    
+    tmp4 = MULTIPLY(tmp4, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
+    tmp5 = MULTIPLY(tmp5, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
+    tmp6 = MULTIPLY(tmp6, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
+    tmp7 = MULTIPLY(tmp7, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
+    z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
+    z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
+    z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
+    z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
+    
+    z3 += z5;
+    z4 += z5;
+    
+    dataptr[7] = (DCTELEM) DESCALE(tmp4 + z1 + z3, CONST_BITS-PASS1_BITS);
+    dataptr[5] = (DCTELEM) DESCALE(tmp5 + z2 + z4, CONST_BITS-PASS1_BITS);
+    dataptr[3] = (DCTELEM) DESCALE(tmp6 + z2 + z3, CONST_BITS-PASS1_BITS);
+    dataptr[1] = (DCTELEM) DESCALE(tmp7 + z1 + z4, CONST_BITS-PASS1_BITS);
+    
+    dataptr += DCTSIZE;		/* advance pointer to next row */
+  }
+
+  /* Pass 2: process columns.
+   * We remove the PASS1_BITS scaling, but leave the results scaled up
+   * by an overall factor of 8.
+   */
+
+  dataptr = data;
+  for (ctr = DCTSIZE-1; ctr >= 0; ctr--) {
+    tmp0 = dataptr[DCTSIZE*0] + dataptr[DCTSIZE*7];
+    tmp7 = dataptr[DCTSIZE*0] - dataptr[DCTSIZE*7];
+    tmp1 = dataptr[DCTSIZE*1] + dataptr[DCTSIZE*6];
+    tmp6 = dataptr[DCTSIZE*1] - dataptr[DCTSIZE*6];
+    tmp2 = dataptr[DCTSIZE*2] + dataptr[DCTSIZE*5];
+    tmp5 = dataptr[DCTSIZE*2] - dataptr[DCTSIZE*5];
+    tmp3 = dataptr[DCTSIZE*3] + dataptr[DCTSIZE*4];
+    tmp4 = dataptr[DCTSIZE*3] - dataptr[DCTSIZE*4];
+    
+    /* Even part per LL&M figure 1 --- note that published figure is faulty;
+     * rotator "sqrt(2)*c1" should be "sqrt(2)*c6".
+     */
+    
+    tmp10 = tmp0 + tmp3;
+    tmp13 = tmp0 - tmp3;
+    tmp11 = tmp1 + tmp2;
+    tmp12 = tmp1 - tmp2;
+    
+    dataptr[DCTSIZE*0] = (DCTELEM) DESCALE(tmp10 + tmp11, PASS1_BITS);
+    dataptr[DCTSIZE*4] = (DCTELEM) DESCALE(tmp10 - tmp11, PASS1_BITS);
+    
+    z1 = MULTIPLY(tmp12 + tmp13, FIX_0_541196100);
+    dataptr[DCTSIZE*2] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp13, FIX_0_765366865),
+					   CONST_BITS+PASS1_BITS);
+    dataptr[DCTSIZE*6] = (DCTELEM) DESCALE(z1 + MULTIPLY(tmp12, - FIX_1_847759065),
+					   CONST_BITS+PASS1_BITS);
+    
+    /* Odd part per figure 8 --- note paper omits factor of sqrt(2).
+     * cK represents cos(K*pi/16).
+     * i0..i3 in the paper are tmp4..tmp7 here.
+     */
+    
+    z1 = tmp4 + tmp7;
+    z2 = tmp5 + tmp6;
+    z3 = tmp4 + tmp6;
+    z4 = tmp5 + tmp7;
+    z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
+    
+    tmp4 = MULTIPLY(tmp4, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
+    tmp5 = MULTIPLY(tmp5, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
+    tmp6 = MULTIPLY(tmp6, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
+    tmp7 = MULTIPLY(tmp7, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
+    z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
+    z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
+    z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
+    z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
+    
+    z3 += z5;
+    z4 += z5;
+    
+    dataptr[DCTSIZE*7] = (DCTELEM) DESCALE(tmp4 + z1 + z3,
+					   CONST_BITS+PASS1_BITS);
+    dataptr[DCTSIZE*5] = (DCTELEM) DESCALE(tmp5 + z2 + z4,
+					   CONST_BITS+PASS1_BITS);
+    dataptr[DCTSIZE*3] = (DCTELEM) DESCALE(tmp6 + z2 + z3,
+					   CONST_BITS+PASS1_BITS);
+    dataptr[DCTSIZE*1] = (DCTELEM) DESCALE(tmp7 + z1 + z4,
+					   CONST_BITS+PASS1_BITS);
+    
+    dataptr++;			/* advance pointer to next column */
+  }
+}
+
+#endif /* DCT_ISLOW_SUPPORTED */
diff --git a/common/jpeg/jidctflt.c b/common/jpeg/jidctflt.c
new file mode 100644
index 00000000..0188ce3d
--- /dev/null
+++ b/common/jpeg/jidctflt.c
@@ -0,0 +1,242 @@
+/*
+ * jidctflt.c
+ *
+ * Copyright (C) 1994-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains a floating-point implementation of the
+ * inverse DCT (Discrete Cosine Transform).  In the IJG code, this routine
+ * must also perform dequantization of the input coefficients.
+ *
+ * This implementation should be more accurate than either of the integer
+ * IDCT implementations.  However, it may not give the same results on all
+ * machines because of differences in roundoff behavior.  Speed will depend
+ * on the hardware's floating point capacity.
+ *
+ * A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
+ * on each row (or vice versa, but it's more convenient to emit a row at
+ * a time).  Direct algorithms are also available, but they are much more
+ * complex and seem not to be any faster when reduced to code.
+ *
+ * This implementation is based on Arai, Agui, and Nakajima's algorithm for
+ * scaled DCT.  Their original paper (Trans. IEICE E-71(11):1095) is in
+ * Japanese, but the algorithm is described in the Pennebaker & Mitchell
+ * JPEG textbook (see REFERENCES section in file README).  The following code
+ * is based directly on figure 4-8 in P&M.
+ * While an 8-point DCT cannot be done in less than 11 multiplies, it is
+ * possible to arrange the computation so that many of the multiplies are
+ * simple scalings of the final outputs.  These multiplies can then be
+ * folded into the multiplications or divisions by the JPEG quantization
+ * table entries.  The AA&N method leaves only 5 multiplies and 29 adds
+ * to be done in the DCT itself.
+ * The primary disadvantage of this method is that with a fixed-point
+ * implementation, accuracy is lost due to imprecise representation of the
+ * scaled quantization values.  However, that problem does not arise if
+ * we use floating point arithmetic.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+#ifdef DCT_FLOAT_SUPPORTED
+
+
+/*
+ * This module is specialized to the case DCTSIZE = 8.
+ */
+
+#if DCTSIZE != 8
+  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
+#endif
+
+
+/* Dequantize a coefficient by multiplying it by the multiplier-table
+ * entry; produce a float result.
+ */
+
+#define DEQUANTIZE(coef,quantval)  (((FAST_FLOAT) (coef)) * (quantval))
+
+
+/*
+ * Perform dequantization and inverse DCT on one block of coefficients.
+ */
+
+GLOBAL(void)
+jpeg_idct_float (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+		 JCOEFPTR coef_block,
+		 JSAMPARRAY output_buf, JDIMENSION output_col)
+{
+  FAST_FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  FAST_FLOAT tmp10, tmp11, tmp12, tmp13;
+  FAST_FLOAT z5, z10, z11, z12, z13;
+  JCOEFPTR inptr;
+  FLOAT_MULT_TYPE * quantptr;
+  FAST_FLOAT * wsptr;
+  JSAMPROW outptr;
+  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
+  int ctr;
+  FAST_FLOAT workspace[DCTSIZE2]; /* buffers data between passes */
+  SHIFT_TEMPS
+
+  /* Pass 1: process columns from input, store into work array. */
+
+  inptr = coef_block;
+  quantptr = (FLOAT_MULT_TYPE *) compptr->dct_table;
+  wsptr = workspace;
+  for (ctr = DCTSIZE; ctr > 0; ctr--) {
+    /* Due to quantization, we will usually find that many of the input
+     * coefficients are zero, especially the AC terms.  We can exploit this
+     * by short-circuiting the IDCT calculation for any column in which all
+     * the AC terms are zero.  In that case each output is equal to the
+     * DC coefficient (with scale factor as needed).
+     * With typical images and quantization tables, half or more of the
+     * column DCT calculations can be simplified this way.
+     */
+    
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
+	inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
+	inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
+	inptr[DCTSIZE*7] == 0) {
+      /* AC terms all zero */
+      FAST_FLOAT dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
+      
+      wsptr[DCTSIZE*0] = dcval;
+      wsptr[DCTSIZE*1] = dcval;
+      wsptr[DCTSIZE*2] = dcval;
+      wsptr[DCTSIZE*3] = dcval;
+      wsptr[DCTSIZE*4] = dcval;
+      wsptr[DCTSIZE*5] = dcval;
+      wsptr[DCTSIZE*6] = dcval;
+      wsptr[DCTSIZE*7] = dcval;
+      
+      inptr++;			/* advance pointers to next column */
+      quantptr++;
+      wsptr++;
+      continue;
+    }
+    
+    /* Even part */
+
+    tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
+    tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
+    tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
+    tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
+
+    tmp10 = tmp0 + tmp2;	/* phase 3 */
+    tmp11 = tmp0 - tmp2;
+
+    tmp13 = tmp1 + tmp3;	/* phases 5-3 */
+    tmp12 = (tmp1 - tmp3) * ((FAST_FLOAT) 1.414213562) - tmp13; /* 2*c4 */
+
+    tmp0 = tmp10 + tmp13;	/* phase 2 */
+    tmp3 = tmp10 - tmp13;
+    tmp1 = tmp11 + tmp12;
+    tmp2 = tmp11 - tmp12;
+    
+    /* Odd part */
+
+    tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
+    tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
+    tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
+    tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
+
+    z13 = tmp6 + tmp5;		/* phase 6 */
+    z10 = tmp6 - tmp5;
+    z11 = tmp4 + tmp7;
+    z12 = tmp4 - tmp7;
+
+    tmp7 = z11 + z13;		/* phase 5 */
+    tmp11 = (z11 - z13) * ((FAST_FLOAT) 1.414213562); /* 2*c4 */
+
+    z5 = (z10 + z12) * ((FAST_FLOAT) 1.847759065); /* 2*c2 */
+    tmp10 = ((FAST_FLOAT) 1.082392200) * z12 - z5; /* 2*(c2-c6) */
+    tmp12 = ((FAST_FLOAT) -2.613125930) * z10 + z5; /* -2*(c2+c6) */
+
+    tmp6 = tmp12 - tmp7;	/* phase 2 */
+    tmp5 = tmp11 - tmp6;
+    tmp4 = tmp10 + tmp5;
+
+    wsptr[DCTSIZE*0] = tmp0 + tmp7;
+    wsptr[DCTSIZE*7] = tmp0 - tmp7;
+    wsptr[DCTSIZE*1] = tmp1 + tmp6;
+    wsptr[DCTSIZE*6] = tmp1 - tmp6;
+    wsptr[DCTSIZE*2] = tmp2 + tmp5;
+    wsptr[DCTSIZE*5] = tmp2 - tmp5;
+    wsptr[DCTSIZE*4] = tmp3 + tmp4;
+    wsptr[DCTSIZE*3] = tmp3 - tmp4;
+
+    inptr++;			/* advance pointers to next column */
+    quantptr++;
+    wsptr++;
+  }
+  
+  /* Pass 2: process rows from work array, store into output array. */
+  /* Note that we must descale the results by a factor of 8 == 2**3. */
+
+  wsptr = workspace;
+  for (ctr = 0; ctr < DCTSIZE; ctr++) {
+    outptr = output_buf[ctr] + output_col;
+    /* Rows of zeroes can be exploited in the same way as we did with columns.
+     * However, the column calculation has created many nonzero AC terms, so
+     * the simplification applies less often (typically 5% to 10% of the time).
+     * And testing floats for zero is relatively expensive, so we don't bother.
+     */
+    
+    /* Even part */
+
+    tmp10 = wsptr[0] + wsptr[4];
+    tmp11 = wsptr[0] - wsptr[4];
+
+    tmp13 = wsptr[2] + wsptr[6];
+    tmp12 = (wsptr[2] - wsptr[6]) * ((FAST_FLOAT) 1.414213562) - tmp13;
+
+    tmp0 = tmp10 + tmp13;
+    tmp3 = tmp10 - tmp13;
+    tmp1 = tmp11 + tmp12;
+    tmp2 = tmp11 - tmp12;
+
+    /* Odd part */
+
+    z13 = wsptr[5] + wsptr[3];
+    z10 = wsptr[5] - wsptr[3];
+    z11 = wsptr[1] + wsptr[7];
+    z12 = wsptr[1] - wsptr[7];
+
+    tmp7 = z11 + z13;
+    tmp11 = (z11 - z13) * ((FAST_FLOAT) 1.414213562);
+
+    z5 = (z10 + z12) * ((FAST_FLOAT) 1.847759065); /* 2*c2 */
+    tmp10 = ((FAST_FLOAT) 1.082392200) * z12 - z5; /* 2*(c2-c6) */
+    tmp12 = ((FAST_FLOAT) -2.613125930) * z10 + z5; /* -2*(c2+c6) */
+
+    tmp6 = tmp12 - tmp7;
+    tmp5 = tmp11 - tmp6;
+    tmp4 = tmp10 + tmp5;
+
+    /* Final output stage: scale down by a factor of 8 and range-limit */
+
+    outptr[0] = range_limit[(int) DESCALE((INT32) (tmp0 + tmp7), 3)
+			    & RANGE_MASK];
+    outptr[7] = range_limit[(int) DESCALE((INT32) (tmp0 - tmp7), 3)
+			    & RANGE_MASK];
+    outptr[1] = range_limit[(int) DESCALE((INT32) (tmp1 + tmp6), 3)
+			    & RANGE_MASK];
+    outptr[6] = range_limit[(int) DESCALE((INT32) (tmp1 - tmp6), 3)
+			    & RANGE_MASK];
+    outptr[2] = range_limit[(int) DESCALE((INT32) (tmp2 + tmp5), 3)
+			    & RANGE_MASK];
+    outptr[5] = range_limit[(int) DESCALE((INT32) (tmp2 - tmp5), 3)
+			    & RANGE_MASK];
+    outptr[4] = range_limit[(int) DESCALE((INT32) (tmp3 + tmp4), 3)
+			    & RANGE_MASK];
+    outptr[3] = range_limit[(int) DESCALE((INT32) (tmp3 - tmp4), 3)
+			    & RANGE_MASK];
+    
+    wsptr += DCTSIZE;		/* advance pointer to next row */
+  }
+}
+
+#endif /* DCT_FLOAT_SUPPORTED */
diff --git a/common/jpeg/jidctfst.c b/common/jpeg/jidctfst.c
new file mode 100644
index 00000000..dba4216f
--- /dev/null
+++ b/common/jpeg/jidctfst.c
@@ -0,0 +1,368 @@
+/*
+ * jidctfst.c
+ *
+ * Copyright (C) 1994-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains a fast, not so accurate integer implementation of the
+ * inverse DCT (Discrete Cosine Transform).  In the IJG code, this routine
+ * must also perform dequantization of the input coefficients.
+ *
+ * A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
+ * on each row (or vice versa, but it's more convenient to emit a row at
+ * a time).  Direct algorithms are also available, but they are much more
+ * complex and seem not to be any faster when reduced to code.
+ *
+ * This implementation is based on Arai, Agui, and Nakajima's algorithm for
+ * scaled DCT.  Their original paper (Trans. IEICE E-71(11):1095) is in
+ * Japanese, but the algorithm is described in the Pennebaker & Mitchell
+ * JPEG textbook (see REFERENCES section in file README).  The following code
+ * is based directly on figure 4-8 in P&M.
+ * While an 8-point DCT cannot be done in less than 11 multiplies, it is
+ * possible to arrange the computation so that many of the multiplies are
+ * simple scalings of the final outputs.  These multiplies can then be
+ * folded into the multiplications or divisions by the JPEG quantization
+ * table entries.  The AA&N method leaves only 5 multiplies and 29 adds
+ * to be done in the DCT itself.
+ * The primary disadvantage of this method is that with fixed-point math,
+ * accuracy is lost due to imprecise representation of the scaled
+ * quantization values.  The smaller the quantization table entry, the less
+ * precise the scaled value, so this implementation does worse with high-
+ * quality-setting files than with low-quality ones.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+#ifdef DCT_IFAST_SUPPORTED
+
+
+/*
+ * This module is specialized to the case DCTSIZE = 8.
+ */
+
+#if DCTSIZE != 8
+  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
+#endif
+
+
+/* Scaling decisions are generally the same as in the LL&M algorithm;
+ * see jidctint.c for more details.  However, we choose to descale
+ * (right shift) multiplication products as soon as they are formed,
+ * rather than carrying additional fractional bits into subsequent additions.
+ * This compromises accuracy slightly, but it lets us save a few shifts.
+ * More importantly, 16-bit arithmetic is then adequate (for 8-bit samples)
+ * everywhere except in the multiplications proper; this saves a good deal
+ * of work on 16-bit-int machines.
+ *
+ * The dequantized coefficients are not integers because the AA&N scaling
+ * factors have been incorporated.  We represent them scaled up by PASS1_BITS,
+ * so that the first and second IDCT rounds have the same input scaling.
+ * For 8-bit JSAMPLEs, we choose IFAST_SCALE_BITS = PASS1_BITS so as to
+ * avoid a descaling shift; this compromises accuracy rather drastically
+ * for small quantization table entries, but it saves a lot of shifts.
+ * For 12-bit JSAMPLEs, there's no hope of using 16x16 multiplies anyway,
+ * so we use a much larger scaling factor to preserve accuracy.
+ *
+ * A final compromise is to represent the multiplicative constants to only
+ * 8 fractional bits, rather than 13.  This saves some shifting work on some
+ * machines, and may also reduce the cost of multiplication (since there
+ * are fewer one-bits in the constants).
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define CONST_BITS  8
+#define PASS1_BITS  2
+#else
+#define CONST_BITS  8
+#define PASS1_BITS  1		/* lose a little precision to avoid overflow */
+#endif
+
+/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
+ * causing a lot of useless floating-point operations at run time.
+ * To get around this we use the following pre-calculated constants.
+ * If you change CONST_BITS you may want to add appropriate values.
+ * (With a reasonable C compiler, you can just rely on the FIX() macro...)
+ */
+
+#if CONST_BITS == 8
+#define FIX_1_082392200  ((INT32)  277)		/* FIX(1.082392200) */
+#define FIX_1_414213562  ((INT32)  362)		/* FIX(1.414213562) */
+#define FIX_1_847759065  ((INT32)  473)		/* FIX(1.847759065) */
+#define FIX_2_613125930  ((INT32)  669)		/* FIX(2.613125930) */
+#else
+#define FIX_1_082392200  FIX(1.082392200)
+#define FIX_1_414213562  FIX(1.414213562)
+#define FIX_1_847759065  FIX(1.847759065)
+#define FIX_2_613125930  FIX(2.613125930)
+#endif
+
+
+/* We can gain a little more speed, with a further compromise in accuracy,
+ * by omitting the addition in a descaling shift.  This yields an incorrectly
+ * rounded result half the time...
+ */
+
+#ifndef USE_ACCURATE_ROUNDING
+#undef DESCALE
+#define DESCALE(x,n)  RIGHT_SHIFT(x, n)
+#endif
+
+
+/* Multiply a DCTELEM variable by an INT32 constant, and immediately
+ * descale to yield a DCTELEM result.
+ */
+
+#define MULTIPLY(var,const)  ((DCTELEM) DESCALE((var) * (const), CONST_BITS))
+
+
+/* Dequantize a coefficient by multiplying it by the multiplier-table
+ * entry; produce a DCTELEM result.  For 8-bit data a 16x16->16
+ * multiplication will do.  For 12-bit data, the multiplier table is
+ * declared INT32, so a 32-bit multiply will be used.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define DEQUANTIZE(coef,quantval)  (((IFAST_MULT_TYPE) (coef)) * (quantval))
+#else
+#define DEQUANTIZE(coef,quantval)  \
+	DESCALE((coef)*(quantval), IFAST_SCALE_BITS-PASS1_BITS)
+#endif
+
+
+/* Like DESCALE, but applies to a DCTELEM and produces an int.
+ * We assume that int right shift is unsigned if INT32 right shift is.
+ */
+
+#ifdef RIGHT_SHIFT_IS_UNSIGNED
+#define ISHIFT_TEMPS	DCTELEM ishift_temp;
+#if BITS_IN_JSAMPLE == 8
+#define DCTELEMBITS  16		/* DCTELEM may be 16 or 32 bits */
+#else
+#define DCTELEMBITS  32		/* DCTELEM must be 32 bits */
+#endif
+#define IRIGHT_SHIFT(x,shft)  \
+    ((ishift_temp = (x)) < 0 ? \
+     (ishift_temp >> (shft)) | ((~((DCTELEM) 0)) << (DCTELEMBITS-(shft))) : \
+     (ishift_temp >> (shft)))
+#else
+#define ISHIFT_TEMPS
+#define IRIGHT_SHIFT(x,shft)	((x) >> (shft))
+#endif
+
+#ifdef USE_ACCURATE_ROUNDING
+#define IDESCALE(x,n)  ((int) IRIGHT_SHIFT((x) + (1 << ((n)-1)), n))
+#else
+#define IDESCALE(x,n)  ((int) IRIGHT_SHIFT(x, n))
+#endif
+
+
+/*
+ * Perform dequantization and inverse DCT on one block of coefficients.
+ */
+
+GLOBAL(void)
+jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+		 JCOEFPTR coef_block,
+		 JSAMPARRAY output_buf, JDIMENSION output_col)
+{
+  DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
+  DCTELEM tmp10, tmp11, tmp12, tmp13;
+  DCTELEM z5, z10, z11, z12, z13;
+  JCOEFPTR inptr;
+  IFAST_MULT_TYPE * quantptr;
+  int * wsptr;
+  JSAMPROW outptr;
+  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
+  int ctr;
+  int workspace[DCTSIZE2];	/* buffers data between passes */
+  SHIFT_TEMPS			/* for DESCALE */
+  ISHIFT_TEMPS			/* for IDESCALE */
+
+  /* Pass 1: process columns from input, store into work array. */
+
+  inptr = coef_block;
+  quantptr = (IFAST_MULT_TYPE *) compptr->dct_table;
+  wsptr = workspace;
+  for (ctr = DCTSIZE; ctr > 0; ctr--) {
+    /* Due to quantization, we will usually find that many of the input
+     * coefficients are zero, especially the AC terms.  We can exploit this
+     * by short-circuiting the IDCT calculation for any column in which all
+     * the AC terms are zero.  In that case each output is equal to the
+     * DC coefficient (with scale factor as needed).
+     * With typical images and quantization tables, half or more of the
+     * column DCT calculations can be simplified this way.
+     */
+    
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
+	inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
+	inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
+	inptr[DCTSIZE*7] == 0) {
+      /* AC terms all zero */
+      int dcval = (int) DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
+
+      wsptr[DCTSIZE*0] = dcval;
+      wsptr[DCTSIZE*1] = dcval;
+      wsptr[DCTSIZE*2] = dcval;
+      wsptr[DCTSIZE*3] = dcval;
+      wsptr[DCTSIZE*4] = dcval;
+      wsptr[DCTSIZE*5] = dcval;
+      wsptr[DCTSIZE*6] = dcval;
+      wsptr[DCTSIZE*7] = dcval;
+      
+      inptr++;			/* advance pointers to next column */
+      quantptr++;
+      wsptr++;
+      continue;
+    }
+    
+    /* Even part */
+
+    tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
+    tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
+    tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
+    tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
+
+    tmp10 = tmp0 + tmp2;	/* phase 3 */
+    tmp11 = tmp0 - tmp2;
+
+    tmp13 = tmp1 + tmp3;	/* phases 5-3 */
+    tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
+
+    tmp0 = tmp10 + tmp13;	/* phase 2 */
+    tmp3 = tmp10 - tmp13;
+    tmp1 = tmp11 + tmp12;
+    tmp2 = tmp11 - tmp12;
+    
+    /* Odd part */
+
+    tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
+    tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
+    tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
+    tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
+
+    z13 = tmp6 + tmp5;		/* phase 6 */
+    z10 = tmp6 - tmp5;
+    z11 = tmp4 + tmp7;
+    z12 = tmp4 - tmp7;
+
+    tmp7 = z11 + z13;		/* phase 5 */
+    tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
+
+    z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
+    tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
+    tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
+
+    tmp6 = tmp12 - tmp7;	/* phase 2 */
+    tmp5 = tmp11 - tmp6;
+    tmp4 = tmp10 + tmp5;
+
+    wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
+    wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
+    wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
+    wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
+    wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5);
+    wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
+    wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
+    wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
+
+    inptr++;			/* advance pointers to next column */
+    quantptr++;
+    wsptr++;
+  }
+  
+  /* Pass 2: process rows from work array, store into output array. */
+  /* Note that we must descale the results by a factor of 8 == 2**3, */
+  /* and also undo the PASS1_BITS scaling. */
+
+  wsptr = workspace;
+  for (ctr = 0; ctr < DCTSIZE; ctr++) {
+    outptr = output_buf[ctr] + output_col;
+    /* Rows of zeroes can be exploited in the same way as we did with columns.
+     * However, the column calculation has created many nonzero AC terms, so
+     * the simplification applies less often (typically 5% to 10% of the time).
+     * On machines with very fast multiplication, it's possible that the
+     * test takes more time than it's worth.  In that case this section
+     * may be commented out.
+     */
+    
+#ifndef NO_ZERO_ROW_TEST
+    if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 && wsptr[4] == 0 &&
+	wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
+      /* AC terms all zero */
+      JSAMPLE dcval = range_limit[IDESCALE(wsptr[0], PASS1_BITS+3)
+				  & RANGE_MASK];
+      
+      outptr[0] = dcval;
+      outptr[1] = dcval;
+      outptr[2] = dcval;
+      outptr[3] = dcval;
+      outptr[4] = dcval;
+      outptr[5] = dcval;
+      outptr[6] = dcval;
+      outptr[7] = dcval;
+
+      wsptr += DCTSIZE;		/* advance pointer to next row */
+      continue;
+    }
+#endif
+    
+    /* Even part */
+
+    tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
+    tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
+
+    tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
+    tmp12 = MULTIPLY((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6], FIX_1_414213562)
+	    - tmp13;
+
+    tmp0 = tmp10 + tmp13;
+    tmp3 = tmp10 - tmp13;
+    tmp1 = tmp11 + tmp12;
+    tmp2 = tmp11 - tmp12;
+
+    /* Odd part */
+
+    z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
+    z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
+    z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
+    z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
+
+    tmp7 = z11 + z13;		/* phase 5 */
+    tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
+
+    z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
+    tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
+    tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
+
+    tmp6 = tmp12 - tmp7;	/* phase 2 */
+    tmp5 = tmp11 - tmp6;
+    tmp4 = tmp10 + tmp5;
+
+    /* Final output stage: scale down by a factor of 8 and range-limit */
+
+    outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
+			    & RANGE_MASK];
+
+    wsptr += DCTSIZE;		/* advance pointer to next row */
+  }
+}
+
+#endif /* DCT_IFAST_SUPPORTED */
diff --git a/common/jpeg/jidctint.c b/common/jpeg/jidctint.c
new file mode 100644
index 00000000..a72b3207
--- /dev/null
+++ b/common/jpeg/jidctint.c
@@ -0,0 +1,389 @@
+/*
+ * jidctint.c
+ *
+ * Copyright (C) 1991-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains a slow-but-accurate integer implementation of the
+ * inverse DCT (Discrete Cosine Transform).  In the IJG code, this routine
+ * must also perform dequantization of the input coefficients.
+ *
+ * A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
+ * on each row (or vice versa, but it's more convenient to emit a row at
+ * a time).  Direct algorithms are also available, but they are much more
+ * complex and seem not to be any faster when reduced to code.
+ *
+ * This implementation is based on an algorithm described in
+ *   C. Loeffler, A. Ligtenberg and G. Moschytz, "Practical Fast 1-D DCT
+ *   Algorithms with 11 Multiplications", Proc. Int'l. Conf. on Acoustics,
+ *   Speech, and Signal Processing 1989 (ICASSP '89), pp. 988-991.
+ * The primary algorithm described there uses 11 multiplies and 29 adds.
+ * We use their alternate method with 12 multiplies and 32 adds.
+ * The advantage of this method is that no data path contains more than one
+ * multiplication; this allows a very simple and accurate implementation in
+ * scaled fixed-point arithmetic, with a minimal number of shifts.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+#ifdef DCT_ISLOW_SUPPORTED
+
+
+/*
+ * This module is specialized to the case DCTSIZE = 8.
+ */
+
+#if DCTSIZE != 8
+  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
+#endif
+
+
+/*
+ * The poop on this scaling stuff is as follows:
+ *
+ * Each 1-D IDCT step produces outputs which are a factor of sqrt(N)
+ * larger than the true IDCT outputs.  The final outputs are therefore
+ * a factor of N larger than desired; since N=8 this can be cured by
+ * a simple right shift at the end of the algorithm.  The advantage of
+ * this arrangement is that we save two multiplications per 1-D IDCT,
+ * because the y0 and y4 inputs need not be divided by sqrt(N).
+ *
+ * We have to do addition and subtraction of the integer inputs, which
+ * is no problem, and multiplication by fractional constants, which is
+ * a problem to do in integer arithmetic.  We multiply all the constants
+ * by CONST_SCALE and convert them to integer constants (thus retaining
+ * CONST_BITS bits of precision in the constants).  After doing a
+ * multiplication we have to divide the product by CONST_SCALE, with proper
+ * rounding, to produce the correct output.  This division can be done
+ * cheaply as a right shift of CONST_BITS bits.  We postpone shifting
+ * as long as possible so that partial sums can be added together with
+ * full fractional precision.
+ *
+ * The outputs of the first pass are scaled up by PASS1_BITS bits so that
+ * they are represented to better-than-integral precision.  These outputs
+ * require BITS_IN_JSAMPLE + PASS1_BITS + 3 bits; this fits in a 16-bit word
+ * with the recommended scaling.  (To scale up 12-bit sample data further, an
+ * intermediate INT32 array would be needed.)
+ *
+ * To avoid overflow of the 32-bit intermediate results in pass 2, we must
+ * have BITS_IN_JSAMPLE + CONST_BITS + PASS1_BITS <= 26.  Error analysis
+ * shows that the values given below are the most effective.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define CONST_BITS  13
+#define PASS1_BITS  2
+#else
+#define CONST_BITS  13
+#define PASS1_BITS  1		/* lose a little precision to avoid overflow */
+#endif
+
+/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
+ * causing a lot of useless floating-point operations at run time.
+ * To get around this we use the following pre-calculated constants.
+ * If you change CONST_BITS you may want to add appropriate values.
+ * (With a reasonable C compiler, you can just rely on the FIX() macro...)
+ */
+
+#if CONST_BITS == 13
+#define FIX_0_298631336  ((INT32)  2446)	/* FIX(0.298631336) */
+#define FIX_0_390180644  ((INT32)  3196)	/* FIX(0.390180644) */
+#define FIX_0_541196100  ((INT32)  4433)	/* FIX(0.541196100) */
+#define FIX_0_765366865  ((INT32)  6270)	/* FIX(0.765366865) */
+#define FIX_0_899976223  ((INT32)  7373)	/* FIX(0.899976223) */
+#define FIX_1_175875602  ((INT32)  9633)	/* FIX(1.175875602) */
+#define FIX_1_501321110  ((INT32)  12299)	/* FIX(1.501321110) */
+#define FIX_1_847759065  ((INT32)  15137)	/* FIX(1.847759065) */
+#define FIX_1_961570560  ((INT32)  16069)	/* FIX(1.961570560) */
+#define FIX_2_053119869  ((INT32)  16819)	/* FIX(2.053119869) */
+#define FIX_2_562915447  ((INT32)  20995)	/* FIX(2.562915447) */
+#define FIX_3_072711026  ((INT32)  25172)	/* FIX(3.072711026) */
+#else
+#define FIX_0_298631336  FIX(0.298631336)
+#define FIX_0_390180644  FIX(0.390180644)
+#define FIX_0_541196100  FIX(0.541196100)
+#define FIX_0_765366865  FIX(0.765366865)
+#define FIX_0_899976223  FIX(0.899976223)
+#define FIX_1_175875602  FIX(1.175875602)
+#define FIX_1_501321110  FIX(1.501321110)
+#define FIX_1_847759065  FIX(1.847759065)
+#define FIX_1_961570560  FIX(1.961570560)
+#define FIX_2_053119869  FIX(2.053119869)
+#define FIX_2_562915447  FIX(2.562915447)
+#define FIX_3_072711026  FIX(3.072711026)
+#endif
+
+
+/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
+ * For 8-bit samples with the recommended scaling, all the variable
+ * and constant values involved are no more than 16 bits wide, so a
+ * 16x16->32 bit multiply can be used instead of a full 32x32 multiply.
+ * For 12-bit samples, a full 32-bit multiplication will be needed.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define MULTIPLY(var,const)  MULTIPLY16C16(var,const)
+#else
+#define MULTIPLY(var,const)  ((var) * (const))
+#endif
+
+
+/* Dequantize a coefficient by multiplying it by the multiplier-table
+ * entry; produce an int result.  In this module, both inputs and result
+ * are 16 bits or less, so either int or short multiply will work.
+ */
+
+#define DEQUANTIZE(coef,quantval)  (((ISLOW_MULT_TYPE) (coef)) * (quantval))
+
+
+/*
+ * Perform dequantization and inverse DCT on one block of coefficients.
+ */
+
+GLOBAL(void)
+jpeg_idct_islow (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+		 JCOEFPTR coef_block,
+		 JSAMPARRAY output_buf, JDIMENSION output_col)
+{
+  INT32 tmp0, tmp1, tmp2, tmp3;
+  INT32 tmp10, tmp11, tmp12, tmp13;
+  INT32 z1, z2, z3, z4, z5;
+  JCOEFPTR inptr;
+  ISLOW_MULT_TYPE * quantptr;
+  int * wsptr;
+  JSAMPROW outptr;
+  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
+  int ctr;
+  int workspace[DCTSIZE2];	/* buffers data between passes */
+  SHIFT_TEMPS
+
+  /* Pass 1: process columns from input, store into work array. */
+  /* Note results are scaled up by sqrt(8) compared to a true IDCT; */
+  /* furthermore, we scale the results by 2**PASS1_BITS. */
+
+  inptr = coef_block;
+  quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
+  wsptr = workspace;
+  for (ctr = DCTSIZE; ctr > 0; ctr--) {
+    /* Due to quantization, we will usually find that many of the input
+     * coefficients are zero, especially the AC terms.  We can exploit this
+     * by short-circuiting the IDCT calculation for any column in which all
+     * the AC terms are zero.  In that case each output is equal to the
+     * DC coefficient (with scale factor as needed).
+     * With typical images and quantization tables, half or more of the
+     * column DCT calculations can be simplified this way.
+     */
+    
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
+	inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*4] == 0 &&
+	inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*6] == 0 &&
+	inptr[DCTSIZE*7] == 0) {
+      /* AC terms all zero */
+      int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
+      
+      wsptr[DCTSIZE*0] = dcval;
+      wsptr[DCTSIZE*1] = dcval;
+      wsptr[DCTSIZE*2] = dcval;
+      wsptr[DCTSIZE*3] = dcval;
+      wsptr[DCTSIZE*4] = dcval;
+      wsptr[DCTSIZE*5] = dcval;
+      wsptr[DCTSIZE*6] = dcval;
+      wsptr[DCTSIZE*7] = dcval;
+      
+      inptr++;			/* advance pointers to next column */
+      quantptr++;
+      wsptr++;
+      continue;
+    }
+    
+    /* Even part: reverse the even part of the forward DCT. */
+    /* The rotator is sqrt(2)*c(-6). */
+    
+    z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
+    z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
+    
+    z1 = MULTIPLY(z2 + z3, FIX_0_541196100);
+    tmp2 = z1 + MULTIPLY(z3, - FIX_1_847759065);
+    tmp3 = z1 + MULTIPLY(z2, FIX_0_765366865);
+    
+    z2 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
+    z3 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
+
+    tmp0 = (z2 + z3) << CONST_BITS;
+    tmp1 = (z2 - z3) << CONST_BITS;
+    
+    tmp10 = tmp0 + tmp3;
+    tmp13 = tmp0 - tmp3;
+    tmp11 = tmp1 + tmp2;
+    tmp12 = tmp1 - tmp2;
+    
+    /* Odd part per figure 8; the matrix is unitary and hence its
+     * transpose is its inverse.  i0..i3 are y7,y5,y3,y1 respectively.
+     */
+    
+    tmp0 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
+    tmp1 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
+    tmp2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
+    tmp3 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
+    
+    z1 = tmp0 + tmp3;
+    z2 = tmp1 + tmp2;
+    z3 = tmp0 + tmp2;
+    z4 = tmp1 + tmp3;
+    z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
+    
+    tmp0 = MULTIPLY(tmp0, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
+    tmp1 = MULTIPLY(tmp1, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
+    tmp2 = MULTIPLY(tmp2, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
+    tmp3 = MULTIPLY(tmp3, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
+    z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
+    z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
+    z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
+    z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
+    
+    z3 += z5;
+    z4 += z5;
+    
+    tmp0 += z1 + z3;
+    tmp1 += z2 + z4;
+    tmp2 += z2 + z3;
+    tmp3 += z1 + z4;
+    
+    /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
+    
+    wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp3, CONST_BITS-PASS1_BITS);
+    wsptr[DCTSIZE*7] = (int) DESCALE(tmp10 - tmp3, CONST_BITS-PASS1_BITS);
+    wsptr[DCTSIZE*1] = (int) DESCALE(tmp11 + tmp2, CONST_BITS-PASS1_BITS);
+    wsptr[DCTSIZE*6] = (int) DESCALE(tmp11 - tmp2, CONST_BITS-PASS1_BITS);
+    wsptr[DCTSIZE*2] = (int) DESCALE(tmp12 + tmp1, CONST_BITS-PASS1_BITS);
+    wsptr[DCTSIZE*5] = (int) DESCALE(tmp12 - tmp1, CONST_BITS-PASS1_BITS);
+    wsptr[DCTSIZE*3] = (int) DESCALE(tmp13 + tmp0, CONST_BITS-PASS1_BITS);
+    wsptr[DCTSIZE*4] = (int) DESCALE(tmp13 - tmp0, CONST_BITS-PASS1_BITS);
+    
+    inptr++;			/* advance pointers to next column */
+    quantptr++;
+    wsptr++;
+  }
+  
+  /* Pass 2: process rows from work array, store into output array. */
+  /* Note that we must descale the results by a factor of 8 == 2**3, */
+  /* and also undo the PASS1_BITS scaling. */
+
+  wsptr = workspace;
+  for (ctr = 0; ctr < DCTSIZE; ctr++) {
+    outptr = output_buf[ctr] + output_col;
+    /* Rows of zeroes can be exploited in the same way as we did with columns.
+     * However, the column calculation has created many nonzero AC terms, so
+     * the simplification applies less often (typically 5% to 10% of the time).
+     * On machines with very fast multiplication, it's possible that the
+     * test takes more time than it's worth.  In that case this section
+     * may be commented out.
+     */
+    
+#ifndef NO_ZERO_ROW_TEST
+    if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 && wsptr[4] == 0 &&
+	wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
+      /* AC terms all zero */
+      JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
+				  & RANGE_MASK];
+      
+      outptr[0] = dcval;
+      outptr[1] = dcval;
+      outptr[2] = dcval;
+      outptr[3] = dcval;
+      outptr[4] = dcval;
+      outptr[5] = dcval;
+      outptr[6] = dcval;
+      outptr[7] = dcval;
+
+      wsptr += DCTSIZE;		/* advance pointer to next row */
+      continue;
+    }
+#endif
+    
+    /* Even part: reverse the even part of the forward DCT. */
+    /* The rotator is sqrt(2)*c(-6). */
+    
+    z2 = (INT32) wsptr[2];
+    z3 = (INT32) wsptr[6];
+    
+    z1 = MULTIPLY(z2 + z3, FIX_0_541196100);
+    tmp2 = z1 + MULTIPLY(z3, - FIX_1_847759065);
+    tmp3 = z1 + MULTIPLY(z2, FIX_0_765366865);
+    
+    tmp0 = ((INT32) wsptr[0] + (INT32) wsptr[4]) << CONST_BITS;
+    tmp1 = ((INT32) wsptr[0] - (INT32) wsptr[4]) << CONST_BITS;
+    
+    tmp10 = tmp0 + tmp3;
+    tmp13 = tmp0 - tmp3;
+    tmp11 = tmp1 + tmp2;
+    tmp12 = tmp1 - tmp2;
+    
+    /* Odd part per figure 8; the matrix is unitary and hence its
+     * transpose is its inverse.  i0..i3 are y7,y5,y3,y1 respectively.
+     */
+    
+    tmp0 = (INT32) wsptr[7];
+    tmp1 = (INT32) wsptr[5];
+    tmp2 = (INT32) wsptr[3];
+    tmp3 = (INT32) wsptr[1];
+    
+    z1 = tmp0 + tmp3;
+    z2 = tmp1 + tmp2;
+    z3 = tmp0 + tmp2;
+    z4 = tmp1 + tmp3;
+    z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
+    
+    tmp0 = MULTIPLY(tmp0, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
+    tmp1 = MULTIPLY(tmp1, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
+    tmp2 = MULTIPLY(tmp2, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
+    tmp3 = MULTIPLY(tmp3, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
+    z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
+    z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
+    z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
+    z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
+    
+    z3 += z5;
+    z4 += z5;
+    
+    tmp0 += z1 + z3;
+    tmp1 += z2 + z4;
+    tmp2 += z2 + z3;
+    tmp3 += z1 + z4;
+    
+    /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
+    
+    outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp3,
+					  CONST_BITS+PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[7] = range_limit[(int) DESCALE(tmp10 - tmp3,
+					  CONST_BITS+PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[1] = range_limit[(int) DESCALE(tmp11 + tmp2,
+					  CONST_BITS+PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[6] = range_limit[(int) DESCALE(tmp11 - tmp2,
+					  CONST_BITS+PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[2] = range_limit[(int) DESCALE(tmp12 + tmp1,
+					  CONST_BITS+PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[5] = range_limit[(int) DESCALE(tmp12 - tmp1,
+					  CONST_BITS+PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[3] = range_limit[(int) DESCALE(tmp13 + tmp0,
+					  CONST_BITS+PASS1_BITS+3)
+			    & RANGE_MASK];
+    outptr[4] = range_limit[(int) DESCALE(tmp13 - tmp0,
+					  CONST_BITS+PASS1_BITS+3)
+			    & RANGE_MASK];
+    
+    wsptr += DCTSIZE;		/* advance pointer to next row */
+  }
+}
+
+#endif /* DCT_ISLOW_SUPPORTED */
diff --git a/common/jpeg/jidctred.c b/common/jpeg/jidctred.c
new file mode 100644
index 00000000..421f3c7c
--- /dev/null
+++ b/common/jpeg/jidctred.c
@@ -0,0 +1,398 @@
+/*
+ * jidctred.c
+ *
+ * Copyright (C) 1994-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains inverse-DCT routines that produce reduced-size output:
+ * either 4x4, 2x2, or 1x1 pixels from an 8x8 DCT block.
+ *
+ * The implementation is based on the Loeffler, Ligtenberg and Moschytz (LL&M)
+ * algorithm used in jidctint.c.  We simply replace each 8-to-8 1-D IDCT step
+ * with an 8-to-4 step that produces the four averages of two adjacent outputs
+ * (or an 8-to-2 step producing two averages of four outputs, for 2x2 output).
+ * These steps were derived by computing the corresponding values at the end
+ * of the normal LL&M code, then simplifying as much as possible.
+ *
+ * 1x1 is trivial: just take the DC coefficient divided by 8.
+ *
+ * See jidctint.c for additional comments.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jdct.h"		/* Private declarations for DCT subsystem */
+
+#ifdef IDCT_SCALING_SUPPORTED
+
+
+/*
+ * This module is specialized to the case DCTSIZE = 8.
+ */
+
+#if DCTSIZE != 8
+  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
+#endif
+
+
+/* Scaling is the same as in jidctint.c. */
+
+#if BITS_IN_JSAMPLE == 8
+#define CONST_BITS  13
+#define PASS1_BITS  2
+#else
+#define CONST_BITS  13
+#define PASS1_BITS  1		/* lose a little precision to avoid overflow */
+#endif
+
+/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
+ * causing a lot of useless floating-point operations at run time.
+ * To get around this we use the following pre-calculated constants.
+ * If you change CONST_BITS you may want to add appropriate values.
+ * (With a reasonable C compiler, you can just rely on the FIX() macro...)
+ */
+
+#if CONST_BITS == 13
+#define FIX_0_211164243  ((INT32)  1730)	/* FIX(0.211164243) */
+#define FIX_0_509795579  ((INT32)  4176)	/* FIX(0.509795579) */
+#define FIX_0_601344887  ((INT32)  4926)	/* FIX(0.601344887) */
+#define FIX_0_720959822  ((INT32)  5906)	/* FIX(0.720959822) */
+#define FIX_0_765366865  ((INT32)  6270)	/* FIX(0.765366865) */
+#define FIX_0_850430095  ((INT32)  6967)	/* FIX(0.850430095) */
+#define FIX_0_899976223  ((INT32)  7373)	/* FIX(0.899976223) */
+#define FIX_1_061594337  ((INT32)  8697)	/* FIX(1.061594337) */
+#define FIX_1_272758580  ((INT32)  10426)	/* FIX(1.272758580) */
+#define FIX_1_451774981  ((INT32)  11893)	/* FIX(1.451774981) */
+#define FIX_1_847759065  ((INT32)  15137)	/* FIX(1.847759065) */
+#define FIX_2_172734803  ((INT32)  17799)	/* FIX(2.172734803) */
+#define FIX_2_562915447  ((INT32)  20995)	/* FIX(2.562915447) */
+#define FIX_3_624509785  ((INT32)  29692)	/* FIX(3.624509785) */
+#else
+#define FIX_0_211164243  FIX(0.211164243)
+#define FIX_0_509795579  FIX(0.509795579)
+#define FIX_0_601344887  FIX(0.601344887)
+#define FIX_0_720959822  FIX(0.720959822)
+#define FIX_0_765366865  FIX(0.765366865)
+#define FIX_0_850430095  FIX(0.850430095)
+#define FIX_0_899976223  FIX(0.899976223)
+#define FIX_1_061594337  FIX(1.061594337)
+#define FIX_1_272758580  FIX(1.272758580)
+#define FIX_1_451774981  FIX(1.451774981)
+#define FIX_1_847759065  FIX(1.847759065)
+#define FIX_2_172734803  FIX(2.172734803)
+#define FIX_2_562915447  FIX(2.562915447)
+#define FIX_3_624509785  FIX(3.624509785)
+#endif
+
+
+/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
+ * For 8-bit samples with the recommended scaling, all the variable
+ * and constant values involved are no more than 16 bits wide, so a
+ * 16x16->32 bit multiply can be used instead of a full 32x32 multiply.
+ * For 12-bit samples, a full 32-bit multiplication will be needed.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+#define MULTIPLY(var,const)  MULTIPLY16C16(var,const)
+#else
+#define MULTIPLY(var,const)  ((var) * (const))
+#endif
+
+
+/* Dequantize a coefficient by multiplying it by the multiplier-table
+ * entry; produce an int result.  In this module, both inputs and result
+ * are 16 bits or less, so either int or short multiply will work.
+ */
+
+#define DEQUANTIZE(coef,quantval)  (((ISLOW_MULT_TYPE) (coef)) * (quantval))
+
+
+/*
+ * Perform dequantization and inverse DCT on one block of coefficients,
+ * producing a reduced-size 4x4 output block.
+ */
+
+GLOBAL(void)
+jpeg_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	       JCOEFPTR coef_block,
+	       JSAMPARRAY output_buf, JDIMENSION output_col)
+{
+  INT32 tmp0, tmp2, tmp10, tmp12;
+  INT32 z1, z2, z3, z4;
+  JCOEFPTR inptr;
+  ISLOW_MULT_TYPE * quantptr;
+  int * wsptr;
+  JSAMPROW outptr;
+  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
+  int ctr;
+  int workspace[DCTSIZE*4];	/* buffers data between passes */
+  SHIFT_TEMPS
+
+  /* Pass 1: process columns from input, store into work array. */
+
+  inptr = coef_block;
+  quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
+  wsptr = workspace;
+  for (ctr = DCTSIZE; ctr > 0; inptr++, quantptr++, wsptr++, ctr--) {
+    /* Don't bother to process column 4, because second pass won't use it */
+    if (ctr == DCTSIZE-4)
+      continue;
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*2] == 0 &&
+	inptr[DCTSIZE*3] == 0 && inptr[DCTSIZE*5] == 0 &&
+	inptr[DCTSIZE*6] == 0 && inptr[DCTSIZE*7] == 0) {
+      /* AC terms all zero; we need not examine term 4 for 4x4 output */
+      int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
+      
+      wsptr[DCTSIZE*0] = dcval;
+      wsptr[DCTSIZE*1] = dcval;
+      wsptr[DCTSIZE*2] = dcval;
+      wsptr[DCTSIZE*3] = dcval;
+      
+      continue;
+    }
+    
+    /* Even part */
+    
+    tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
+    tmp0 <<= (CONST_BITS+1);
+    
+    z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
+    z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
+
+    tmp2 = MULTIPLY(z2, FIX_1_847759065) + MULTIPLY(z3, - FIX_0_765366865);
+    
+    tmp10 = tmp0 + tmp2;
+    tmp12 = tmp0 - tmp2;
+    
+    /* Odd part */
+    
+    z1 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
+    z2 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
+    z3 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
+    z4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
+    
+    tmp0 = MULTIPLY(z1, - FIX_0_211164243) /* sqrt(2) * (c3-c1) */
+	 + MULTIPLY(z2, FIX_1_451774981) /* sqrt(2) * (c3+c7) */
+	 + MULTIPLY(z3, - FIX_2_172734803) /* sqrt(2) * (-c1-c5) */
+	 + MULTIPLY(z4, FIX_1_061594337); /* sqrt(2) * (c5+c7) */
+    
+    tmp2 = MULTIPLY(z1, - FIX_0_509795579) /* sqrt(2) * (c7-c5) */
+	 + MULTIPLY(z2, - FIX_0_601344887) /* sqrt(2) * (c5-c1) */
+	 + MULTIPLY(z3, FIX_0_899976223) /* sqrt(2) * (c3-c7) */
+	 + MULTIPLY(z4, FIX_2_562915447); /* sqrt(2) * (c1+c3) */
+
+    /* Final output stage */
+    
+    wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp2, CONST_BITS-PASS1_BITS+1);
+    wsptr[DCTSIZE*3] = (int) DESCALE(tmp10 - tmp2, CONST_BITS-PASS1_BITS+1);
+    wsptr[DCTSIZE*1] = (int) DESCALE(tmp12 + tmp0, CONST_BITS-PASS1_BITS+1);
+    wsptr[DCTSIZE*2] = (int) DESCALE(tmp12 - tmp0, CONST_BITS-PASS1_BITS+1);
+  }
+  
+  /* Pass 2: process 4 rows from work array, store into output array. */
+
+  wsptr = workspace;
+  for (ctr = 0; ctr < 4; ctr++) {
+    outptr = output_buf[ctr] + output_col;
+    /* It's not clear whether a zero row test is worthwhile here ... */
+
+#ifndef NO_ZERO_ROW_TEST
+    if (wsptr[1] == 0 && wsptr[2] == 0 && wsptr[3] == 0 &&
+	wsptr[5] == 0 && wsptr[6] == 0 && wsptr[7] == 0) {
+      /* AC terms all zero */
+      JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
+				  & RANGE_MASK];
+      
+      outptr[0] = dcval;
+      outptr[1] = dcval;
+      outptr[2] = dcval;
+      outptr[3] = dcval;
+      
+      wsptr += DCTSIZE;		/* advance pointer to next row */
+      continue;
+    }
+#endif
+    
+    /* Even part */
+    
+    tmp0 = ((INT32) wsptr[0]) << (CONST_BITS+1);
+    
+    tmp2 = MULTIPLY((INT32) wsptr[2], FIX_1_847759065)
+	 + MULTIPLY((INT32) wsptr[6], - FIX_0_765366865);
+    
+    tmp10 = tmp0 + tmp2;
+    tmp12 = tmp0 - tmp2;
+    
+    /* Odd part */
+    
+    z1 = (INT32) wsptr[7];
+    z2 = (INT32) wsptr[5];
+    z3 = (INT32) wsptr[3];
+    z4 = (INT32) wsptr[1];
+    
+    tmp0 = MULTIPLY(z1, - FIX_0_211164243) /* sqrt(2) * (c3-c1) */
+	 + MULTIPLY(z2, FIX_1_451774981) /* sqrt(2) * (c3+c7) */
+	 + MULTIPLY(z3, - FIX_2_172734803) /* sqrt(2) * (-c1-c5) */
+	 + MULTIPLY(z4, FIX_1_061594337); /* sqrt(2) * (c5+c7) */
+    
+    tmp2 = MULTIPLY(z1, - FIX_0_509795579) /* sqrt(2) * (c7-c5) */
+	 + MULTIPLY(z2, - FIX_0_601344887) /* sqrt(2) * (c5-c1) */
+	 + MULTIPLY(z3, FIX_0_899976223) /* sqrt(2) * (c3-c7) */
+	 + MULTIPLY(z4, FIX_2_562915447); /* sqrt(2) * (c1+c3) */
+
+    /* Final output stage */
+    
+    outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp2,
+					  CONST_BITS+PASS1_BITS+3+1)
+			    & RANGE_MASK];
+    outptr[3] = range_limit[(int) DESCALE(tmp10 - tmp2,
+					  CONST_BITS+PASS1_BITS+3+1)
+			    & RANGE_MASK];
+    outptr[1] = range_limit[(int) DESCALE(tmp12 + tmp0,
+					  CONST_BITS+PASS1_BITS+3+1)
+			    & RANGE_MASK];
+    outptr[2] = range_limit[(int) DESCALE(tmp12 - tmp0,
+					  CONST_BITS+PASS1_BITS+3+1)
+			    & RANGE_MASK];
+    
+    wsptr += DCTSIZE;		/* advance pointer to next row */
+  }
+}
+
+
+/*
+ * Perform dequantization and inverse DCT on one block of coefficients,
+ * producing a reduced-size 2x2 output block.
+ */
+
+GLOBAL(void)
+jpeg_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	       JCOEFPTR coef_block,
+	       JSAMPARRAY output_buf, JDIMENSION output_col)
+{
+  INT32 tmp0, tmp10, z1;
+  JCOEFPTR inptr;
+  ISLOW_MULT_TYPE * quantptr;
+  int * wsptr;
+  JSAMPROW outptr;
+  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
+  int ctr;
+  int workspace[DCTSIZE*2];	/* buffers data between passes */
+  SHIFT_TEMPS
+
+  /* Pass 1: process columns from input, store into work array. */
+
+  inptr = coef_block;
+  quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
+  wsptr = workspace;
+  for (ctr = DCTSIZE; ctr > 0; inptr++, quantptr++, wsptr++, ctr--) {
+    /* Don't bother to process columns 2,4,6 */
+    if (ctr == DCTSIZE-2 || ctr == DCTSIZE-4 || ctr == DCTSIZE-6)
+      continue;
+    if (inptr[DCTSIZE*1] == 0 && inptr[DCTSIZE*3] == 0 &&
+	inptr[DCTSIZE*5] == 0 && inptr[DCTSIZE*7] == 0) {
+      /* AC terms all zero; we need not examine terms 2,4,6 for 2x2 output */
+      int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
+      
+      wsptr[DCTSIZE*0] = dcval;
+      wsptr[DCTSIZE*1] = dcval;
+      
+      continue;
+    }
+    
+    /* Even part */
+    
+    z1 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
+    tmp10 = z1 << (CONST_BITS+2);
+    
+    /* Odd part */
+
+    z1 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
+    tmp0 = MULTIPLY(z1, - FIX_0_720959822); /* sqrt(2) * (c7-c5+c3-c1) */
+    z1 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
+    tmp0 += MULTIPLY(z1, FIX_0_850430095); /* sqrt(2) * (-c1+c3+c5+c7) */
+    z1 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
+    tmp0 += MULTIPLY(z1, - FIX_1_272758580); /* sqrt(2) * (-c1+c3-c5-c7) */
+    z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
+    tmp0 += MULTIPLY(z1, FIX_3_624509785); /* sqrt(2) * (c1+c3+c5+c7) */
+
+    /* Final output stage */
+    
+    wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp0, CONST_BITS-PASS1_BITS+2);
+    wsptr[DCTSIZE*1] = (int) DESCALE(tmp10 - tmp0, CONST_BITS-PASS1_BITS+2);
+  }
+  
+  /* Pass 2: process 2 rows from work array, store into output array. */
+
+  wsptr = workspace;
+  for (ctr = 0; ctr < 2; ctr++) {
+    outptr = output_buf[ctr] + output_col;
+    /* It's not clear whether a zero row test is worthwhile here ... */
+
+#ifndef NO_ZERO_ROW_TEST
+    if (wsptr[1] == 0 && wsptr[3] == 0 && wsptr[5] == 0 && wsptr[7] == 0) {
+      /* AC terms all zero */
+      JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
+				  & RANGE_MASK];
+      
+      outptr[0] = dcval;
+      outptr[1] = dcval;
+      
+      wsptr += DCTSIZE;		/* advance pointer to next row */
+      continue;
+    }
+#endif
+    
+    /* Even part */
+    
+    tmp10 = ((INT32) wsptr[0]) << (CONST_BITS+2);
+    
+    /* Odd part */
+
+    tmp0 = MULTIPLY((INT32) wsptr[7], - FIX_0_720959822) /* sqrt(2) * (c7-c5+c3-c1) */
+	 + MULTIPLY((INT32) wsptr[5], FIX_0_850430095) /* sqrt(2) * (-c1+c3+c5+c7) */
+	 + MULTIPLY((INT32) wsptr[3], - FIX_1_272758580) /* sqrt(2) * (-c1+c3-c5-c7) */
+	 + MULTIPLY((INT32) wsptr[1], FIX_3_624509785); /* sqrt(2) * (c1+c3+c5+c7) */
+
+    /* Final output stage */
+    
+    outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp0,
+					  CONST_BITS+PASS1_BITS+3+2)
+			    & RANGE_MASK];
+    outptr[1] = range_limit[(int) DESCALE(tmp10 - tmp0,
+					  CONST_BITS+PASS1_BITS+3+2)
+			    & RANGE_MASK];
+    
+    wsptr += DCTSIZE;		/* advance pointer to next row */
+  }
+}
+
+
+/*
+ * Perform dequantization and inverse DCT on one block of coefficients,
+ * producing a reduced-size 1x1 output block.
+ */
+
+GLOBAL(void)
+jpeg_idct_1x1 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
+	       JCOEFPTR coef_block,
+	       JSAMPARRAY output_buf, JDIMENSION output_col)
+{
+  int dcval;
+  ISLOW_MULT_TYPE * quantptr;
+  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
+  SHIFT_TEMPS
+
+  /* We hardly need an inverse DCT routine for this: just take the
+   * average pixel value, which is one-eighth of the DC coefficient.
+   */
+  quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
+  dcval = DEQUANTIZE(coef_block[0], quantptr[0]);
+  dcval = (int) DESCALE((INT32) dcval, 3);
+
+  output_buf[0][output_col] = range_limit[dcval & RANGE_MASK];
+}
+
+#endif /* IDCT_SCALING_SUPPORTED */
diff --git a/common/jpeg/jinclude.h b/common/jpeg/jinclude.h
new file mode 100644
index 00000000..0a4f1514
--- /dev/null
+++ b/common/jpeg/jinclude.h
@@ -0,0 +1,91 @@
+/*
+ * jinclude.h
+ *
+ * Copyright (C) 1991-1994, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file exists to provide a single place to fix any problems with
+ * including the wrong system include files.  (Common problems are taken
+ * care of by the standard jconfig symbols, but on really weird systems
+ * you may have to edit this file.)
+ *
+ * NOTE: this file is NOT intended to be included by applications using the
+ * JPEG library.  Most applications need only include jpeglib.h.
+ */
+
+
+/* Include auto-config file to find out which system include files we need. */
+
+#include "jconfig.h"		/* auto configuration options */
+#define JCONFIG_INCLUDED	/* so that jpeglib.h doesn't do it again */
+
+/*
+ * We need the NULL macro and size_t typedef.
+ * On an ANSI-conforming system it is sufficient to include <stddef.h>.
+ * Otherwise, we get them from <stdlib.h> or <stdio.h>; we may have to
+ * pull in <sys/types.h> as well.
+ * Note that the core JPEG library does not require <stdio.h>;
+ * only the default error handler and data source/destination modules do.
+ * But we must pull it in because of the references to FILE in jpeglib.h.
+ * You can remove those references if you want to compile without <stdio.h>.
+ */
+
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#ifdef NEED_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include <stdio.h>
+
+/*
+ * We need memory copying and zeroing functions, plus strncpy().
+ * ANSI and System V implementations declare these in <string.h>.
+ * BSD doesn't have the mem() functions, but it does have bcopy()/bzero().
+ * Some systems may declare memset and memcpy in <memory.h>.
+ *
+ * NOTE: we assume the size parameters to these functions are of type size_t.
+ * Change the casts in these macros if not!
+ */
+
+#ifdef NEED_BSD_STRINGS
+
+#include <strings.h>
+#define MEMZERO(target,size)	bzero((void *)(target), (size_t)(size))
+#define MEMCOPY(dest,src,size)	bcopy((const void *)(src), (void *)(dest), (size_t)(size))
+
+#else /* not BSD, assume ANSI/SysV string lib */
+
+#include <string.h>
+#define MEMZERO(target,size)	memset((void *)(target), 0, (size_t)(size))
+#define MEMCOPY(dest,src,size)	memcpy((void *)(dest), (const void *)(src), (size_t)(size))
+
+#endif
+
+/*
+ * In ANSI C, and indeed any rational implementation, size_t is also the
+ * type returned by sizeof().  However, it seems there are some irrational
+ * implementations out there, in which sizeof() returns an int even though
+ * size_t is defined as long or unsigned long.  To ensure consistent results
+ * we always use this SIZEOF() macro in place of using sizeof() directly.
+ */
+
+#define SIZEOF(object)	((size_t) sizeof(object))
+
+/*
+ * The modules that use fread() and fwrite() always invoke them through
+ * these macros.  On some systems you may need to twiddle the argument casts.
+ * CAUTION: argument order is different from underlying functions!
+ */
+
+#define JFREAD(file,buf,sizeofbuf)  \
+  ((size_t) fread((void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
+#define JFWRITE(file,buf,sizeofbuf)  \
+  ((size_t) fwrite((const void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
diff --git a/common/jpeg/jmemmgr.c b/common/jpeg/jmemmgr.c
new file mode 100644
index 00000000..d801b322
--- /dev/null
+++ b/common/jpeg/jmemmgr.c
@@ -0,0 +1,1118 @@
+/*
+ * jmemmgr.c
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains the JPEG system-independent memory management
+ * routines.  This code is usable across a wide variety of machines; most
+ * of the system dependencies have been isolated in a separate file.
+ * The major functions provided here are:
+ *   * pool-based allocation and freeing of memory;
+ *   * policy decisions about how to divide available memory among the
+ *     virtual arrays;
+ *   * control logic for swapping virtual arrays between main memory and
+ *     backing storage.
+ * The separate system-dependent file provides the actual backing-storage
+ * access code, and it contains the policy decision about how much total
+ * main memory to use.
+ * This file is system-dependent in the sense that some of its functions
+ * are unnecessary in some systems.  For example, if there is enough virtual
+ * memory so that backing storage will never be used, much of the virtual
+ * array control logic could be removed.  (Of course, if you have that much
+ * memory then you shouldn't care about a little bit of unused code...)
+ */
+
+#define JPEG_INTERNALS
+#define AM_MEMORY_MANAGER	/* we define jvirt_Xarray_control structs */
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jmemsys.h"		/* import the system-dependent declarations */
+
+#ifndef NO_GETENV
+#ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare getenv() */
+extern char * getenv JPP((const char * name));
+#endif
+#endif
+
+
+/*
+ * Some important notes:
+ *   The allocation routines provided here must never return NULL.
+ *   They should exit to error_exit if unsuccessful.
+ *
+ *   It's not a good idea to try to merge the sarray and barray routines,
+ *   even though they are textually almost the same, because samples are
+ *   usually stored as bytes while coefficients are shorts or ints.  Thus,
+ *   in machines where byte pointers have a different representation from
+ *   word pointers, the resulting machine code could not be the same.
+ */
+
+
+/*
+ * Many machines require storage alignment: longs must start on 4-byte
+ * boundaries, doubles on 8-byte boundaries, etc.  On such machines, malloc()
+ * always returns pointers that are multiples of the worst-case alignment
+ * requirement, and we had better do so too.
+ * There isn't any really portable way to determine the worst-case alignment
+ * requirement.  This module assumes that the alignment requirement is
+ * multiples of sizeof(ALIGN_TYPE).
+ * By default, we define ALIGN_TYPE as double.  This is necessary on some
+ * workstations (where doubles really do need 8-byte alignment) and will work
+ * fine on nearly everything.  If your machine has lesser alignment needs,
+ * you can save a few bytes by making ALIGN_TYPE smaller.
+ * The only place I know of where this will NOT work is certain Macintosh
+ * 680x0 compilers that define double as a 10-byte IEEE extended float.
+ * Doing 10-byte alignment is counterproductive because longwords won't be
+ * aligned well.  Put "#define ALIGN_TYPE long" in jconfig.h if you have
+ * such a compiler.
+ */
+
+#ifndef ALIGN_TYPE		/* so can override from jconfig.h */
+#define ALIGN_TYPE  double
+#endif
+
+
+/*
+ * We allocate objects from "pools", where each pool is gotten with a single
+ * request to jpeg_get_small() or jpeg_get_large().  There is no per-object
+ * overhead within a pool, except for alignment padding.  Each pool has a
+ * header with a link to the next pool of the same class.
+ * Small and large pool headers are identical except that the latter's
+ * link pointer must be FAR on 80x86 machines.
+ * Notice that the "real" header fields are union'ed with a dummy ALIGN_TYPE
+ * field.  This forces the compiler to make SIZEOF(small_pool_hdr) a multiple
+ * of the alignment requirement of ALIGN_TYPE.
+ */
+
+typedef union small_pool_struct * small_pool_ptr;
+
+typedef union small_pool_struct {
+  struct {
+    small_pool_ptr next;	/* next in list of pools */
+    size_t bytes_used;		/* how many bytes already used within pool */
+    size_t bytes_left;		/* bytes still available in this pool */
+  } hdr;
+  ALIGN_TYPE dummy;		/* included in union to ensure alignment */
+} small_pool_hdr;
+
+typedef union large_pool_struct FAR * large_pool_ptr;
+
+typedef union large_pool_struct {
+  struct {
+    large_pool_ptr next;	/* next in list of pools */
+    size_t bytes_used;		/* how many bytes already used within pool */
+    size_t bytes_left;		/* bytes still available in this pool */
+  } hdr;
+  ALIGN_TYPE dummy;		/* included in union to ensure alignment */
+} large_pool_hdr;
+
+
+/*
+ * Here is the full definition of a memory manager object.
+ */
+
+typedef struct {
+  struct jpeg_memory_mgr pub;	/* public fields */
+
+  /* Each pool identifier (lifetime class) names a linked list of pools. */
+  small_pool_ptr small_list[JPOOL_NUMPOOLS];
+  large_pool_ptr large_list[JPOOL_NUMPOOLS];
+
+  /* Since we only have one lifetime class of virtual arrays, only one
+   * linked list is necessary (for each datatype).  Note that the virtual
+   * array control blocks being linked together are actually stored somewhere
+   * in the small-pool list.
+   */
+  jvirt_sarray_ptr virt_sarray_list;
+  jvirt_barray_ptr virt_barray_list;
+
+  /* This counts total space obtained from jpeg_get_small/large */
+  long total_space_allocated;
+
+  /* alloc_sarray and alloc_barray set this value for use by virtual
+   * array routines.
+   */
+  JDIMENSION last_rowsperchunk;	/* from most recent alloc_sarray/barray */
+} my_memory_mgr;
+
+typedef my_memory_mgr * my_mem_ptr;
+
+
+/*
+ * The control blocks for virtual arrays.
+ * Note that these blocks are allocated in the "small" pool area.
+ * System-dependent info for the associated backing store (if any) is hidden
+ * inside the backing_store_info struct.
+ */
+
+struct jvirt_sarray_control {
+  JSAMPARRAY mem_buffer;	/* => the in-memory buffer */
+  JDIMENSION rows_in_array;	/* total virtual array height */
+  JDIMENSION samplesperrow;	/* width of array (and of memory buffer) */
+  JDIMENSION maxaccess;		/* max rows accessed by access_virt_sarray */
+  JDIMENSION rows_in_mem;	/* height of memory buffer */
+  JDIMENSION rowsperchunk;	/* allocation chunk size in mem_buffer */
+  JDIMENSION cur_start_row;	/* first logical row # in the buffer */
+  JDIMENSION first_undef_row;	/* row # of first uninitialized row */
+  boolean pre_zero;		/* pre-zero mode requested? */
+  boolean dirty;		/* do current buffer contents need written? */
+  boolean b_s_open;		/* is backing-store data valid? */
+  jvirt_sarray_ptr next;	/* link to next virtual sarray control block */
+  backing_store_info b_s_info;	/* System-dependent control info */
+};
+
+struct jvirt_barray_control {
+  JBLOCKARRAY mem_buffer;	/* => the in-memory buffer */
+  JDIMENSION rows_in_array;	/* total virtual array height */
+  JDIMENSION blocksperrow;	/* width of array (and of memory buffer) */
+  JDIMENSION maxaccess;		/* max rows accessed by access_virt_barray */
+  JDIMENSION rows_in_mem;	/* height of memory buffer */
+  JDIMENSION rowsperchunk;	/* allocation chunk size in mem_buffer */
+  JDIMENSION cur_start_row;	/* first logical row # in the buffer */
+  JDIMENSION first_undef_row;	/* row # of first uninitialized row */
+  boolean pre_zero;		/* pre-zero mode requested? */
+  boolean dirty;		/* do current buffer contents need written? */
+  boolean b_s_open;		/* is backing-store data valid? */
+  jvirt_barray_ptr next;	/* link to next virtual barray control block */
+  backing_store_info b_s_info;	/* System-dependent control info */
+};
+
+
+#ifdef MEM_STATS		/* optional extra stuff for statistics */
+
+LOCAL(void)
+print_mem_stats (j_common_ptr cinfo, int pool_id)
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  small_pool_ptr shdr_ptr;
+  large_pool_ptr lhdr_ptr;
+
+  /* Since this is only a debugging stub, we can cheat a little by using
+   * fprintf directly rather than going through the trace message code.
+   * This is helpful because message parm array can't handle longs.
+   */
+  fprintf(stderr, "Freeing pool %d, total space = %ld\n",
+	  pool_id, mem->total_space_allocated);
+
+  for (lhdr_ptr = mem->large_list[pool_id]; lhdr_ptr != NULL;
+       lhdr_ptr = lhdr_ptr->hdr.next) {
+    fprintf(stderr, "  Large chunk used %ld\n",
+	    (long) lhdr_ptr->hdr.bytes_used);
+  }
+
+  for (shdr_ptr = mem->small_list[pool_id]; shdr_ptr != NULL;
+       shdr_ptr = shdr_ptr->hdr.next) {
+    fprintf(stderr, "  Small chunk used %ld free %ld\n",
+	    (long) shdr_ptr->hdr.bytes_used,
+	    (long) shdr_ptr->hdr.bytes_left);
+  }
+}
+
+#endif /* MEM_STATS */
+
+
+LOCAL(void)
+out_of_memory (j_common_ptr cinfo, int which)
+/* Report an out-of-memory error and stop execution */
+/* If we compiled MEM_STATS support, report alloc requests before dying */
+{
+#ifdef MEM_STATS
+  cinfo->err->trace_level = 2;	/* force self_destruct to report stats */
+#endif
+  ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, which);
+}
+
+
+/*
+ * Allocation of "small" objects.
+ *
+ * For these, we use pooled storage.  When a new pool must be created,
+ * we try to get enough space for the current request plus a "slop" factor,
+ * where the slop will be the amount of leftover space in the new pool.
+ * The speed vs. space tradeoff is largely determined by the slop values.
+ * A different slop value is provided for each pool class (lifetime),
+ * and we also distinguish the first pool of a class from later ones.
+ * NOTE: the values given work fairly well on both 16- and 32-bit-int
+ * machines, but may be too small if longs are 64 bits or more.
+ */
+
+static const size_t first_pool_slop[JPOOL_NUMPOOLS] = 
+{
+	1600,			/* first PERMANENT pool */
+	16000			/* first IMAGE pool */
+};
+
+static const size_t extra_pool_slop[JPOOL_NUMPOOLS] = 
+{
+	0,			/* additional PERMANENT pools */
+	5000			/* additional IMAGE pools */
+};
+
+#define MIN_SLOP  50		/* greater than 0 to avoid futile looping */
+
+
+METHODDEF(void *)
+alloc_small (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
+/* Allocate a "small" object */
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  small_pool_ptr hdr_ptr, prev_hdr_ptr;
+  char * data_ptr;
+  size_t odd_bytes, min_request, slop;
+
+  /* Check for unsatisfiable request (do now to ensure no overflow below) */
+  if (sizeofobject > (size_t) (MAX_ALLOC_CHUNK-SIZEOF(small_pool_hdr)))
+    out_of_memory(cinfo, 1);	/* request exceeds malloc's ability */
+
+  /* Round up the requested size to a multiple of SIZEOF(ALIGN_TYPE) */
+  odd_bytes = sizeofobject % SIZEOF(ALIGN_TYPE);
+  if (odd_bytes > 0)
+    sizeofobject += SIZEOF(ALIGN_TYPE) - odd_bytes;
+
+  /* See if space is available in any existing pool */
+  if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
+    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
+  prev_hdr_ptr = NULL;
+  hdr_ptr = mem->small_list[pool_id];
+  while (hdr_ptr != NULL) {
+    if (hdr_ptr->hdr.bytes_left >= sizeofobject)
+      break;			/* found pool with enough space */
+    prev_hdr_ptr = hdr_ptr;
+    hdr_ptr = hdr_ptr->hdr.next;
+  }
+
+  /* Time to make a new pool? */
+  if (hdr_ptr == NULL) {
+    /* min_request is what we need now, slop is what will be leftover */
+    min_request = sizeofobject + SIZEOF(small_pool_hdr);
+    if (prev_hdr_ptr == NULL)	/* first pool in class? */
+      slop = first_pool_slop[pool_id];
+    else
+      slop = extra_pool_slop[pool_id];
+    /* Don't ask for more than MAX_ALLOC_CHUNK */
+    if (slop > (size_t) (MAX_ALLOC_CHUNK-min_request))
+      slop = (size_t) (MAX_ALLOC_CHUNK-min_request);
+    /* Try to get space, if fail reduce slop and try again */
+    for (;;) {
+      hdr_ptr = (small_pool_ptr) jpeg_get_small(cinfo, min_request + slop);
+      if (hdr_ptr != NULL)
+	break;
+      slop /= 2;
+      if (slop < MIN_SLOP)	/* give up when it gets real small */
+	out_of_memory(cinfo, 2); /* jpeg_get_small failed */
+    }
+    mem->total_space_allocated += min_request + slop;
+    /* Success, initialize the new pool header and add to end of list */
+    hdr_ptr->hdr.next = NULL;
+    hdr_ptr->hdr.bytes_used = 0;
+    hdr_ptr->hdr.bytes_left = sizeofobject + slop;
+    if (prev_hdr_ptr == NULL)	/* first pool in class? */
+      mem->small_list[pool_id] = hdr_ptr;
+    else
+      prev_hdr_ptr->hdr.next = hdr_ptr;
+  }
+
+  /* OK, allocate the object from the current pool */
+  data_ptr = (char *) (hdr_ptr + 1); /* point to first data byte in pool */
+  data_ptr += hdr_ptr->hdr.bytes_used; /* point to place for object */
+  hdr_ptr->hdr.bytes_used += sizeofobject;
+  hdr_ptr->hdr.bytes_left -= sizeofobject;
+
+  return (void *) data_ptr;
+}
+
+
+/*
+ * Allocation of "large" objects.
+ *
+ * The external semantics of these are the same as "small" objects,
+ * except that FAR pointers are used on 80x86.  However the pool
+ * management heuristics are quite different.  We assume that each
+ * request is large enough that it may as well be passed directly to
+ * jpeg_get_large; the pool management just links everything together
+ * so that we can free it all on demand.
+ * Note: the major use of "large" objects is in JSAMPARRAY and JBLOCKARRAY
+ * structures.  The routines that create these structures (see below)
+ * deliberately bunch rows together to ensure a large request size.
+ */
+
+METHODDEF(void FAR *)
+alloc_large (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
+/* Allocate a "large" object */
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  large_pool_ptr hdr_ptr;
+  size_t odd_bytes;
+
+  /* Check for unsatisfiable request (do now to ensure no overflow below) */
+  if (sizeofobject > (size_t) (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)))
+    out_of_memory(cinfo, 3);	/* request exceeds malloc's ability */
+
+  /* Round up the requested size to a multiple of SIZEOF(ALIGN_TYPE) */
+  odd_bytes = sizeofobject % SIZEOF(ALIGN_TYPE);
+  if (odd_bytes > 0)
+    sizeofobject += SIZEOF(ALIGN_TYPE) - odd_bytes;
+
+  /* Always make a new pool */
+  if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
+    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
+
+  hdr_ptr = (large_pool_ptr) jpeg_get_large(cinfo, sizeofobject +
+					    SIZEOF(large_pool_hdr));
+  if (hdr_ptr == NULL)
+    out_of_memory(cinfo, 4);	/* jpeg_get_large failed */
+  mem->total_space_allocated += sizeofobject + SIZEOF(large_pool_hdr);
+
+  /* Success, initialize the new pool header and add to list */
+  hdr_ptr->hdr.next = mem->large_list[pool_id];
+  /* We maintain space counts in each pool header for statistical purposes,
+   * even though they are not needed for allocation.
+   */
+  hdr_ptr->hdr.bytes_used = sizeofobject;
+  hdr_ptr->hdr.bytes_left = 0;
+  mem->large_list[pool_id] = hdr_ptr;
+
+  return (void FAR *) (hdr_ptr + 1); /* point to first data byte in pool */
+}
+
+
+/*
+ * Creation of 2-D sample arrays.
+ * The pointers are in near heap, the samples themselves in FAR heap.
+ *
+ * To minimize allocation overhead and to allow I/O of large contiguous
+ * blocks, we allocate the sample rows in groups of as many rows as possible
+ * without exceeding MAX_ALLOC_CHUNK total bytes per allocation request.
+ * NB: the virtual array control routines, later in this file, know about
+ * this chunking of rows.  The rowsperchunk value is left in the mem manager
+ * object so that it can be saved away if this sarray is the workspace for
+ * a virtual array.
+ */
+
+METHODDEF(JSAMPARRAY)
+alloc_sarray (j_common_ptr cinfo, int pool_id,
+	      JDIMENSION samplesperrow, JDIMENSION numrows)
+/* Allocate a 2-D sample array */
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  JSAMPARRAY result;
+  JSAMPROW workspace;
+  JDIMENSION rowsperchunk, currow, i;
+  long ltemp;
+
+  /* Calculate max # of rows allowed in one allocation chunk */
+  ltemp = (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)) /
+	  ((long) samplesperrow * SIZEOF(JSAMPLE));
+  if (ltemp <= 0)
+    ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
+  if (ltemp < (long) numrows)
+    rowsperchunk = (JDIMENSION) ltemp;
+  else
+    rowsperchunk = numrows;
+  mem->last_rowsperchunk = rowsperchunk;
+
+  /* Get space for row pointers (small object) */
+  result = (JSAMPARRAY) alloc_small(cinfo, pool_id,
+				    (size_t) (numrows * SIZEOF(JSAMPROW)));
+
+  /* Get the rows themselves (large objects) */
+  currow = 0;
+  while (currow < numrows) {
+    rowsperchunk = MIN(rowsperchunk, numrows - currow);
+    workspace = (JSAMPROW) alloc_large(cinfo, pool_id,
+	(size_t) ((size_t) rowsperchunk * (size_t) samplesperrow
+		  * SIZEOF(JSAMPLE)));
+    for (i = rowsperchunk; i > 0; i--) {
+      result[currow++] = workspace;
+      workspace += samplesperrow;
+    }
+  }
+
+  return result;
+}
+
+
+/*
+ * Creation of 2-D coefficient-block arrays.
+ * This is essentially the same as the code for sample arrays, above.
+ */
+
+METHODDEF(JBLOCKARRAY)
+alloc_barray (j_common_ptr cinfo, int pool_id,
+	      JDIMENSION blocksperrow, JDIMENSION numrows)
+/* Allocate a 2-D coefficient-block array */
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  JBLOCKARRAY result;
+  JBLOCKROW workspace;
+  JDIMENSION rowsperchunk, currow, i;
+  long ltemp;
+
+  /* Calculate max # of rows allowed in one allocation chunk */
+  ltemp = (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)) /
+	  ((long) blocksperrow * SIZEOF(JBLOCK));
+  if (ltemp <= 0)
+    ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
+  if (ltemp < (long) numrows)
+    rowsperchunk = (JDIMENSION) ltemp;
+  else
+    rowsperchunk = numrows;
+  mem->last_rowsperchunk = rowsperchunk;
+
+  /* Get space for row pointers (small object) */
+  result = (JBLOCKARRAY) alloc_small(cinfo, pool_id,
+				     (size_t) (numrows * SIZEOF(JBLOCKROW)));
+
+  /* Get the rows themselves (large objects) */
+  currow = 0;
+  while (currow < numrows) {
+    rowsperchunk = MIN(rowsperchunk, numrows - currow);
+    workspace = (JBLOCKROW) alloc_large(cinfo, pool_id,
+	(size_t) ((size_t) rowsperchunk * (size_t) blocksperrow
+		  * SIZEOF(JBLOCK)));
+    for (i = rowsperchunk; i > 0; i--) {
+      result[currow++] = workspace;
+      workspace += blocksperrow;
+    }
+  }
+
+  return result;
+}
+
+
+/*
+ * About virtual array management:
+ *
+ * The above "normal" array routines are only used to allocate strip buffers
+ * (as wide as the image, but just a few rows high).  Full-image-sized buffers
+ * are handled as "virtual" arrays.  The array is still accessed a strip at a
+ * time, but the memory manager must save the whole array for repeated
+ * accesses.  The intended implementation is that there is a strip buffer in
+ * memory (as high as is possible given the desired memory limit), plus a
+ * backing file that holds the rest of the array.
+ *
+ * The request_virt_array routines are told the total size of the image and
+ * the maximum number of rows that will be accessed at once.  The in-memory
+ * buffer must be at least as large as the maxaccess value.
+ *
+ * The request routines create control blocks but not the in-memory buffers.
+ * That is postponed until realize_virt_arrays is called.  At that time the
+ * total amount of space needed is known (approximately, anyway), so free
+ * memory can be divided up fairly.
+ *
+ * The access_virt_array routines are responsible for making a specific strip
+ * area accessible (after reading or writing the backing file, if necessary).
+ * Note that the access routines are told whether the caller intends to modify
+ * the accessed strip; during a read-only pass this saves having to rewrite
+ * data to disk.  The access routines are also responsible for pre-zeroing
+ * any newly accessed rows, if pre-zeroing was requested.
+ *
+ * In current usage, the access requests are usually for nonoverlapping
+ * strips; that is, successive access start_row numbers differ by exactly
+ * num_rows = maxaccess.  This means we can get good performance with simple
+ * buffer dump/reload logic, by making the in-memory buffer be a multiple
+ * of the access height; then there will never be accesses across bufferload
+ * boundaries.  The code will still work with overlapping access requests,
+ * but it doesn't handle bufferload overlaps very efficiently.
+ */
+
+
+METHODDEF(jvirt_sarray_ptr)
+request_virt_sarray (j_common_ptr cinfo, int pool_id, boolean pre_zero,
+		     JDIMENSION samplesperrow, JDIMENSION numrows,
+		     JDIMENSION maxaccess)
+/* Request a virtual 2-D sample array */
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  jvirt_sarray_ptr result;
+
+  /* Only IMAGE-lifetime virtual arrays are currently supported */
+  if (pool_id != JPOOL_IMAGE)
+    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
+
+  /* get control block */
+  result = (jvirt_sarray_ptr) alloc_small(cinfo, pool_id,
+					  SIZEOF(struct jvirt_sarray_control));
+
+  result->mem_buffer = NULL;	/* marks array not yet realized */
+  result->rows_in_array = numrows;
+  result->samplesperrow = samplesperrow;
+  result->maxaccess = maxaccess;
+  result->pre_zero = pre_zero;
+  result->b_s_open = FALSE;	/* no associated backing-store object */
+  result->next = mem->virt_sarray_list; /* add to list of virtual arrays */
+  mem->virt_sarray_list = result;
+
+  return result;
+}
+
+
+METHODDEF(jvirt_barray_ptr)
+request_virt_barray (j_common_ptr cinfo, int pool_id, boolean pre_zero,
+		     JDIMENSION blocksperrow, JDIMENSION numrows,
+		     JDIMENSION maxaccess)
+/* Request a virtual 2-D coefficient-block array */
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  jvirt_barray_ptr result;
+
+  /* Only IMAGE-lifetime virtual arrays are currently supported */
+  if (pool_id != JPOOL_IMAGE)
+    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
+
+  /* get control block */
+  result = (jvirt_barray_ptr) alloc_small(cinfo, pool_id,
+					  SIZEOF(struct jvirt_barray_control));
+
+  result->mem_buffer = NULL;	/* marks array not yet realized */
+  result->rows_in_array = numrows;
+  result->blocksperrow = blocksperrow;
+  result->maxaccess = maxaccess;
+  result->pre_zero = pre_zero;
+  result->b_s_open = FALSE;	/* no associated backing-store object */
+  result->next = mem->virt_barray_list; /* add to list of virtual arrays */
+  mem->virt_barray_list = result;
+
+  return result;
+}
+
+
+METHODDEF(void)
+realize_virt_arrays (j_common_ptr cinfo)
+/* Allocate the in-memory buffers for any unrealized virtual arrays */
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  long space_per_minheight, maximum_space, avail_mem;
+  long minheights, max_minheights;
+  jvirt_sarray_ptr sptr;
+  jvirt_barray_ptr bptr;
+
+  /* Compute the minimum space needed (maxaccess rows in each buffer)
+   * and the maximum space needed (full image height in each buffer).
+   * These may be of use to the system-dependent jpeg_mem_available routine.
+   */
+  space_per_minheight = 0;
+  maximum_space = 0;
+  for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
+    if (sptr->mem_buffer == NULL) { /* if not realized yet */
+      space_per_minheight += (long) sptr->maxaccess *
+			     (long) sptr->samplesperrow * SIZEOF(JSAMPLE);
+      maximum_space += (long) sptr->rows_in_array *
+		       (long) sptr->samplesperrow * SIZEOF(JSAMPLE);
+    }
+  }
+  for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
+    if (bptr->mem_buffer == NULL) { /* if not realized yet */
+      space_per_minheight += (long) bptr->maxaccess *
+			     (long) bptr->blocksperrow * SIZEOF(JBLOCK);
+      maximum_space += (long) bptr->rows_in_array *
+		       (long) bptr->blocksperrow * SIZEOF(JBLOCK);
+    }
+  }
+
+  if (space_per_minheight <= 0)
+    return;			/* no unrealized arrays, no work */
+
+  /* Determine amount of memory to actually use; this is system-dependent. */
+  avail_mem = jpeg_mem_available(cinfo, space_per_minheight, maximum_space,
+				 mem->total_space_allocated);
+
+  /* If the maximum space needed is available, make all the buffers full
+   * height; otherwise parcel it out with the same number of minheights
+   * in each buffer.
+   */
+  if (avail_mem >= maximum_space)
+    max_minheights = 1000000000L;
+  else {
+    max_minheights = avail_mem / space_per_minheight;
+    /* If there doesn't seem to be enough space, try to get the minimum
+     * anyway.  This allows a "stub" implementation of jpeg_mem_available().
+     */
+    if (max_minheights <= 0)
+      max_minheights = 1;
+  }
+
+  /* Allocate the in-memory buffers and initialize backing store as needed. */
+
+  for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
+    if (sptr->mem_buffer == NULL) { /* if not realized yet */
+      minheights = ((long) sptr->rows_in_array - 1L) / sptr->maxaccess + 1L;
+      if (minheights <= max_minheights) {
+	/* This buffer fits in memory */
+	sptr->rows_in_mem = sptr->rows_in_array;
+      } else {
+	/* It doesn't fit in memory, create backing store. */
+	sptr->rows_in_mem = (JDIMENSION) (max_minheights * sptr->maxaccess);
+	jpeg_open_backing_store(cinfo, & sptr->b_s_info,
+				(long) sptr->rows_in_array *
+				(long) sptr->samplesperrow *
+				(long) SIZEOF(JSAMPLE));
+	sptr->b_s_open = TRUE;
+      }
+      sptr->mem_buffer = alloc_sarray(cinfo, JPOOL_IMAGE,
+				      sptr->samplesperrow, sptr->rows_in_mem);
+      sptr->rowsperchunk = mem->last_rowsperchunk;
+      sptr->cur_start_row = 0;
+      sptr->first_undef_row = 0;
+      sptr->dirty = FALSE;
+    }
+  }
+
+  for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
+    if (bptr->mem_buffer == NULL) { /* if not realized yet */
+      minheights = ((long) bptr->rows_in_array - 1L) / bptr->maxaccess + 1L;
+      if (minheights <= max_minheights) {
+	/* This buffer fits in memory */
+	bptr->rows_in_mem = bptr->rows_in_array;
+      } else {
+	/* It doesn't fit in memory, create backing store. */
+	bptr->rows_in_mem = (JDIMENSION) (max_minheights * bptr->maxaccess);
+	jpeg_open_backing_store(cinfo, & bptr->b_s_info,
+				(long) bptr->rows_in_array *
+				(long) bptr->blocksperrow *
+				(long) SIZEOF(JBLOCK));
+	bptr->b_s_open = TRUE;
+      }
+      bptr->mem_buffer = alloc_barray(cinfo, JPOOL_IMAGE,
+				      bptr->blocksperrow, bptr->rows_in_mem);
+      bptr->rowsperchunk = mem->last_rowsperchunk;
+      bptr->cur_start_row = 0;
+      bptr->first_undef_row = 0;
+      bptr->dirty = FALSE;
+    }
+  }
+}
+
+
+LOCAL(void)
+do_sarray_io (j_common_ptr cinfo, jvirt_sarray_ptr ptr, boolean writing)
+/* Do backing store read or write of a virtual sample array */
+{
+  long bytesperrow, file_offset, byte_count, rows, thisrow, i;
+
+  bytesperrow = (long) ptr->samplesperrow * SIZEOF(JSAMPLE);
+  file_offset = ptr->cur_start_row * bytesperrow;
+  /* Loop to read or write each allocation chunk in mem_buffer */
+  for (i = 0; i < (long) ptr->rows_in_mem; i += ptr->rowsperchunk) {
+    /* One chunk, but check for short chunk at end of buffer */
+    rows = MIN((long) ptr->rowsperchunk, (long) ptr->rows_in_mem - i);
+    /* Transfer no more than is currently defined */
+    thisrow = (long) ptr->cur_start_row + i;
+    rows = MIN(rows, (long) ptr->first_undef_row - thisrow);
+    /* Transfer no more than fits in file */
+    rows = MIN(rows, (long) ptr->rows_in_array - thisrow);
+    if (rows <= 0)		/* this chunk might be past end of file! */
+      break;
+    byte_count = rows * bytesperrow;
+    if (writing)
+      (*ptr->b_s_info.write_backing_store) (cinfo, & ptr->b_s_info,
+					    (void FAR *) ptr->mem_buffer[i],
+					    file_offset, byte_count);
+    else
+      (*ptr->b_s_info.read_backing_store) (cinfo, & ptr->b_s_info,
+					   (void FAR *) ptr->mem_buffer[i],
+					   file_offset, byte_count);
+    file_offset += byte_count;
+  }
+}
+
+
+LOCAL(void)
+do_barray_io (j_common_ptr cinfo, jvirt_barray_ptr ptr, boolean writing)
+/* Do backing store read or write of a virtual coefficient-block array */
+{
+  long bytesperrow, file_offset, byte_count, rows, thisrow, i;
+
+  bytesperrow = (long) ptr->blocksperrow * SIZEOF(JBLOCK);
+  file_offset = ptr->cur_start_row * bytesperrow;
+  /* Loop to read or write each allocation chunk in mem_buffer */
+  for (i = 0; i < (long) ptr->rows_in_mem; i += ptr->rowsperchunk) {
+    /* One chunk, but check for short chunk at end of buffer */
+    rows = MIN((long) ptr->rowsperchunk, (long) ptr->rows_in_mem - i);
+    /* Transfer no more than is currently defined */
+    thisrow = (long) ptr->cur_start_row + i;
+    rows = MIN(rows, (long) ptr->first_undef_row - thisrow);
+    /* Transfer no more than fits in file */
+    rows = MIN(rows, (long) ptr->rows_in_array - thisrow);
+    if (rows <= 0)		/* this chunk might be past end of file! */
+      break;
+    byte_count = rows * bytesperrow;
+    if (writing)
+      (*ptr->b_s_info.write_backing_store) (cinfo, & ptr->b_s_info,
+					    (void FAR *) ptr->mem_buffer[i],
+					    file_offset, byte_count);
+    else
+      (*ptr->b_s_info.read_backing_store) (cinfo, & ptr->b_s_info,
+					   (void FAR *) ptr->mem_buffer[i],
+					   file_offset, byte_count);
+    file_offset += byte_count;
+  }
+}
+
+
+METHODDEF(JSAMPARRAY)
+access_virt_sarray (j_common_ptr cinfo, jvirt_sarray_ptr ptr,
+		    JDIMENSION start_row, JDIMENSION num_rows,
+		    boolean writable)
+/* Access the part of a virtual sample array starting at start_row */
+/* and extending for num_rows rows.  writable is true if  */
+/* caller intends to modify the accessed area. */
+{
+  JDIMENSION end_row = start_row + num_rows;
+  JDIMENSION undef_row;
+
+  /* debugging check */
+  if (end_row > ptr->rows_in_array || num_rows > ptr->maxaccess ||
+      ptr->mem_buffer == NULL)
+    ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
+
+  /* Make the desired part of the virtual array accessible */
+  if (start_row < ptr->cur_start_row ||
+      end_row > ptr->cur_start_row+ptr->rows_in_mem) {
+    if (! ptr->b_s_open)
+      ERREXIT(cinfo, JERR_VIRTUAL_BUG);
+    /* Flush old buffer contents if necessary */
+    if (ptr->dirty) {
+      do_sarray_io(cinfo, ptr, TRUE);
+      ptr->dirty = FALSE;
+    }
+    /* Decide what part of virtual array to access.
+     * Algorithm: if target address > current window, assume forward scan,
+     * load starting at target address.  If target address < current window,
+     * assume backward scan, load so that target area is top of window.
+     * Note that when switching from forward write to forward read, will have
+     * start_row = 0, so the limiting case applies and we load from 0 anyway.
+     */
+    if (start_row > ptr->cur_start_row) {
+      ptr->cur_start_row = start_row;
+    } else {
+      /* use long arithmetic here to avoid overflow & unsigned problems */
+      long ltemp;
+
+      ltemp = (long) end_row - (long) ptr->rows_in_mem;
+      if (ltemp < 0)
+	ltemp = 0;		/* don't fall off front end of file */
+      ptr->cur_start_row = (JDIMENSION) ltemp;
+    }
+    /* Read in the selected part of the array.
+     * During the initial write pass, we will do no actual read
+     * because the selected part is all undefined.
+     */
+    do_sarray_io(cinfo, ptr, FALSE);
+  }
+  /* Ensure the accessed part of the array is defined; prezero if needed.
+   * To improve locality of access, we only prezero the part of the array
+   * that the caller is about to access, not the entire in-memory array.
+   */
+  if (ptr->first_undef_row < end_row) {
+    if (ptr->first_undef_row < start_row) {
+      if (writable)		/* writer skipped over a section of array */
+	ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
+      undef_row = start_row;	/* but reader is allowed to read ahead */
+    } else {
+      undef_row = ptr->first_undef_row;
+    }
+    if (writable)
+      ptr->first_undef_row = end_row;
+    if (ptr->pre_zero) {
+      size_t bytesperrow = (size_t) ptr->samplesperrow * SIZEOF(JSAMPLE);
+      undef_row -= ptr->cur_start_row; /* make indexes relative to buffer */
+      end_row -= ptr->cur_start_row;
+      while (undef_row < end_row) {
+	jzero_far((void FAR *) ptr->mem_buffer[undef_row], bytesperrow);
+	undef_row++;
+      }
+    } else {
+      if (! writable)		/* reader looking at undefined data */
+	ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
+    }
+  }
+  /* Flag the buffer dirty if caller will write in it */
+  if (writable)
+    ptr->dirty = TRUE;
+  /* Return address of proper part of the buffer */
+  return ptr->mem_buffer + (start_row - ptr->cur_start_row);
+}
+
+
+METHODDEF(JBLOCKARRAY)
+access_virt_barray (j_common_ptr cinfo, jvirt_barray_ptr ptr,
+		    JDIMENSION start_row, JDIMENSION num_rows,
+		    boolean writable)
+/* Access the part of a virtual block array starting at start_row */
+/* and extending for num_rows rows.  writable is true if  */
+/* caller intends to modify the accessed area. */
+{
+  JDIMENSION end_row = start_row + num_rows;
+  JDIMENSION undef_row;
+
+  /* debugging check */
+  if (end_row > ptr->rows_in_array || num_rows > ptr->maxaccess ||
+      ptr->mem_buffer == NULL)
+    ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
+
+  /* Make the desired part of the virtual array accessible */
+  if (start_row < ptr->cur_start_row ||
+      end_row > ptr->cur_start_row+ptr->rows_in_mem) {
+    if (! ptr->b_s_open)
+      ERREXIT(cinfo, JERR_VIRTUAL_BUG);
+    /* Flush old buffer contents if necessary */
+    if (ptr->dirty) {
+      do_barray_io(cinfo, ptr, TRUE);
+      ptr->dirty = FALSE;
+    }
+    /* Decide what part of virtual array to access.
+     * Algorithm: if target address > current window, assume forward scan,
+     * load starting at target address.  If target address < current window,
+     * assume backward scan, load so that target area is top of window.
+     * Note that when switching from forward write to forward read, will have
+     * start_row = 0, so the limiting case applies and we load from 0 anyway.
+     */
+    if (start_row > ptr->cur_start_row) {
+      ptr->cur_start_row = start_row;
+    } else {
+      /* use long arithmetic here to avoid overflow & unsigned problems */
+      long ltemp;
+
+      ltemp = (long) end_row - (long) ptr->rows_in_mem;
+      if (ltemp < 0)
+	ltemp = 0;		/* don't fall off front end of file */
+      ptr->cur_start_row = (JDIMENSION) ltemp;
+    }
+    /* Read in the selected part of the array.
+     * During the initial write pass, we will do no actual read
+     * because the selected part is all undefined.
+     */
+    do_barray_io(cinfo, ptr, FALSE);
+  }
+  /* Ensure the accessed part of the array is defined; prezero if needed.
+   * To improve locality of access, we only prezero the part of the array
+   * that the caller is about to access, not the entire in-memory array.
+   */
+  if (ptr->first_undef_row < end_row) {
+    if (ptr->first_undef_row < start_row) {
+      if (writable)		/* writer skipped over a section of array */
+	ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
+      undef_row = start_row;	/* but reader is allowed to read ahead */
+    } else {
+      undef_row = ptr->first_undef_row;
+    }
+    if (writable)
+      ptr->first_undef_row = end_row;
+    if (ptr->pre_zero) {
+      size_t bytesperrow = (size_t) ptr->blocksperrow * SIZEOF(JBLOCK);
+      undef_row -= ptr->cur_start_row; /* make indexes relative to buffer */
+      end_row -= ptr->cur_start_row;
+      while (undef_row < end_row) {
+	jzero_far((void FAR *) ptr->mem_buffer[undef_row], bytesperrow);
+	undef_row++;
+      }
+    } else {
+      if (! writable)		/* reader looking at undefined data */
+	ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
+    }
+  }
+  /* Flag the buffer dirty if caller will write in it */
+  if (writable)
+    ptr->dirty = TRUE;
+  /* Return address of proper part of the buffer */
+  return ptr->mem_buffer + (start_row - ptr->cur_start_row);
+}
+
+
+/*
+ * Release all objects belonging to a specified pool.
+ */
+
+METHODDEF(void)
+free_pool (j_common_ptr cinfo, int pool_id)
+{
+  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
+  small_pool_ptr shdr_ptr;
+  large_pool_ptr lhdr_ptr;
+  size_t space_freed;
+
+  if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
+    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
+
+#ifdef MEM_STATS
+  if (cinfo->err->trace_level > 1)
+    print_mem_stats(cinfo, pool_id); /* print pool's memory usage statistics */
+#endif
+
+  /* If freeing IMAGE pool, close any virtual arrays first */
+  if (pool_id == JPOOL_IMAGE) {
+    jvirt_sarray_ptr sptr;
+    jvirt_barray_ptr bptr;
+
+    for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
+      if (sptr->b_s_open) {	/* there may be no backing store */
+	sptr->b_s_open = FALSE;	/* prevent recursive close if error */
+	(*sptr->b_s_info.close_backing_store) (cinfo, & sptr->b_s_info);
+      }
+    }
+    mem->virt_sarray_list = NULL;
+    for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
+      if (bptr->b_s_open) {	/* there may be no backing store */
+	bptr->b_s_open = FALSE;	/* prevent recursive close if error */
+	(*bptr->b_s_info.close_backing_store) (cinfo, & bptr->b_s_info);
+      }
+    }
+    mem->virt_barray_list = NULL;
+  }
+
+  /* Release large objects */
+  lhdr_ptr = mem->large_list[pool_id];
+  mem->large_list[pool_id] = NULL;
+
+  while (lhdr_ptr != NULL) {
+    large_pool_ptr next_lhdr_ptr = lhdr_ptr->hdr.next;
+    space_freed = lhdr_ptr->hdr.bytes_used +
+		  lhdr_ptr->hdr.bytes_left +
+		  SIZEOF(large_pool_hdr);
+    jpeg_free_large(cinfo, (void FAR *) lhdr_ptr, space_freed);
+    mem->total_space_allocated -= space_freed;
+    lhdr_ptr = next_lhdr_ptr;
+  }
+
+  /* Release small objects */
+  shdr_ptr = mem->small_list[pool_id];
+  mem->small_list[pool_id] = NULL;
+
+  while (shdr_ptr != NULL) {
+    small_pool_ptr next_shdr_ptr = shdr_ptr->hdr.next;
+    space_freed = shdr_ptr->hdr.bytes_used +
+		  shdr_ptr->hdr.bytes_left +
+		  SIZEOF(small_pool_hdr);
+    jpeg_free_small(cinfo, (void *) shdr_ptr, space_freed);
+    mem->total_space_allocated -= space_freed;
+    shdr_ptr = next_shdr_ptr;
+  }
+}
+
+
+/*
+ * Close up shop entirely.
+ * Note that this cannot be called unless cinfo->mem is non-NULL.
+ */
+
+METHODDEF(void)
+self_destruct (j_common_ptr cinfo)
+{
+  int pool;
+
+  /* Close all backing store, release all memory.
+   * Releasing pools in reverse order might help avoid fragmentation
+   * with some (brain-damaged) malloc libraries.
+   */
+  for (pool = JPOOL_NUMPOOLS-1; pool >= JPOOL_PERMANENT; pool--) {
+    free_pool(cinfo, pool);
+  }
+
+  /* Release the memory manager control block too. */
+  jpeg_free_small(cinfo, (void *) cinfo->mem, SIZEOF(my_memory_mgr));
+  cinfo->mem = NULL;		/* ensures I will be called only once */
+
+  jpeg_mem_term(cinfo);		/* system-dependent cleanup */
+}
+
+
+/*
+ * Memory manager initialization.
+ * When this is called, only the error manager pointer is valid in cinfo!
+ */
+
+GLOBAL(void)
+jinit_memory_mgr (j_common_ptr cinfo)
+{
+  my_mem_ptr mem;
+  long max_to_use;
+  int pool;
+  size_t test_mac;
+
+  cinfo->mem = NULL;		/* for safety if init fails */
+
+  /* Check for configuration errors.
+   * SIZEOF(ALIGN_TYPE) should be a power of 2; otherwise, it probably
+   * doesn't reflect any real hardware alignment requirement.
+   * The test is a little tricky: for X>0, X and X-1 have no one-bits
+   * in common if and only if X is a power of 2, ie has only one one-bit.
+   * Some compilers may give an "unreachable code" warning here; ignore it.
+   */
+  if ((SIZEOF(ALIGN_TYPE) & (SIZEOF(ALIGN_TYPE)-1)) != 0)
+    ERREXIT(cinfo, JERR_BAD_ALIGN_TYPE);
+  /* MAX_ALLOC_CHUNK must be representable as type size_t, and must be
+   * a multiple of SIZEOF(ALIGN_TYPE).
+   * Again, an "unreachable code" warning may be ignored here.
+   * But a "constant too large" warning means you need to fix MAX_ALLOC_CHUNK.
+   */
+  test_mac = (size_t) MAX_ALLOC_CHUNK;
+  if ((long) test_mac != MAX_ALLOC_CHUNK ||
+      (MAX_ALLOC_CHUNK % SIZEOF(ALIGN_TYPE)) != 0)
+    ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
+
+  max_to_use = jpeg_mem_init(cinfo); /* system-dependent initialization */
+
+  /* Attempt to allocate memory manager's control block */
+  mem = (my_mem_ptr) jpeg_get_small(cinfo, SIZEOF(my_memory_mgr));
+
+  if (mem == NULL) {
+    jpeg_mem_term(cinfo);	/* system-dependent cleanup */
+    ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 0);
+  }
+
+  /* OK, fill in the method pointers */
+  mem->pub.alloc_small = alloc_small;
+  mem->pub.alloc_large = alloc_large;
+  mem->pub.alloc_sarray = alloc_sarray;
+  mem->pub.alloc_barray = alloc_barray;
+  mem->pub.request_virt_sarray = request_virt_sarray;
+  mem->pub.request_virt_barray = request_virt_barray;
+  mem->pub.realize_virt_arrays = realize_virt_arrays;
+  mem->pub.access_virt_sarray = access_virt_sarray;
+  mem->pub.access_virt_barray = access_virt_barray;
+  mem->pub.free_pool = free_pool;
+  mem->pub.self_destruct = self_destruct;
+
+  /* Make MAX_ALLOC_CHUNK accessible to other modules */
+  mem->pub.max_alloc_chunk = MAX_ALLOC_CHUNK;
+
+  /* Initialize working state */
+  mem->pub.max_memory_to_use = max_to_use;
+
+  for (pool = JPOOL_NUMPOOLS-1; pool >= JPOOL_PERMANENT; pool--) {
+    mem->small_list[pool] = NULL;
+    mem->large_list[pool] = NULL;
+  }
+  mem->virt_sarray_list = NULL;
+  mem->virt_barray_list = NULL;
+
+  mem->total_space_allocated = SIZEOF(my_memory_mgr);
+
+  /* Declare ourselves open for business */
+  cinfo->mem = & mem->pub;
+
+  /* Check for an environment variable JPEGMEM; if found, override the
+   * default max_memory setting from jpeg_mem_init.  Note that the
+   * surrounding application may again override this value.
+   * If your system doesn't support getenv(), define NO_GETENV to disable
+   * this feature.
+   */
+#ifndef NO_GETENV
+  { char * memenv;
+
+    if ((memenv = getenv("JPEGMEM")) != NULL) {
+      char ch = 'x';
+
+      if (sscanf(memenv, "%ld%c", &max_to_use, &ch) > 0) {
+	if (ch == 'm' || ch == 'M')
+	  max_to_use *= 1000L;
+	mem->pub.max_memory_to_use = max_to_use * 1000L;
+      }
+    }
+  }
+#endif
+
+}
diff --git a/common/jpeg/jmemnobs.c b/common/jpeg/jmemnobs.c
new file mode 100644
index 00000000..eb8c3377
--- /dev/null
+++ b/common/jpeg/jmemnobs.c
@@ -0,0 +1,109 @@
+/*
+ * jmemnobs.c
+ *
+ * Copyright (C) 1992-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file provides a really simple implementation of the system-
+ * dependent portion of the JPEG memory manager.  This implementation
+ * assumes that no backing-store files are needed: all required space
+ * can be obtained from malloc().
+ * This is very portable in the sense that it'll compile on almost anything,
+ * but you'd better have lots of main memory (or virtual memory) if you want
+ * to process big images.
+ * Note that the max_memory_to_use option is ignored by this implementation.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "jmemsys.h"		/* import the system-dependent declarations */
+
+#ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare malloc(),free() */
+extern void * malloc JPP((size_t size));
+extern void free JPP((void *ptr));
+#endif
+
+
+/*
+ * Memory allocation and freeing are controlled by the regular library
+ * routines malloc() and free().
+ */
+
+GLOBAL(void *)
+jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
+{
+  return (void *) malloc(sizeofobject);
+}
+
+GLOBAL(void)
+jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
+{
+  free(object);
+}
+
+
+/*
+ * "Large" objects are treated the same as "small" ones.
+ * NB: although we include FAR keywords in the routine declarations,
+ * this file won't actually work in 80x86 small/medium model; at least,
+ * you probably won't be able to process useful-size images in only 64KB.
+ */
+
+GLOBAL(void FAR *)
+jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
+{
+  return (void FAR *) malloc(sizeofobject);
+}
+
+GLOBAL(void)
+jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
+{
+  free(object);
+}
+
+
+/*
+ * This routine computes the total memory space available for allocation.
+ * Here we always say, "we got all you want bud!"
+ */
+
+GLOBAL(long)
+jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
+		    long max_bytes_needed, long already_allocated)
+{
+  return max_bytes_needed;
+}
+
+
+/*
+ * Backing store (temporary file) management.
+ * Since jpeg_mem_available always promised the moon,
+ * this should never be called and we can just error out.
+ */
+
+GLOBAL(void)
+jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
+			 long total_bytes_needed)
+{
+  ERREXIT(cinfo, JERR_NO_BACKING_STORE);
+}
+
+
+/*
+ * These routines take care of any system-dependent initialization and
+ * cleanup required.  Here, there isn't any.
+ */
+
+GLOBAL(long)
+jpeg_mem_init (j_common_ptr cinfo)
+{
+  return 0;			/* just set max_memory_to_use to 0 */
+}
+
+GLOBAL(void)
+jpeg_mem_term (j_common_ptr cinfo)
+{
+  /* no work */
+}
diff --git a/common/jpeg/jmemsys.h b/common/jpeg/jmemsys.h
new file mode 100644
index 00000000..6c3c6d34
--- /dev/null
+++ b/common/jpeg/jmemsys.h
@@ -0,0 +1,198 @@
+/*
+ * jmemsys.h
+ *
+ * Copyright (C) 1992-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This include file defines the interface between the system-independent
+ * and system-dependent portions of the JPEG memory manager.  No other
+ * modules need include it.  (The system-independent portion is jmemmgr.c;
+ * there are several different versions of the system-dependent portion.)
+ *
+ * This file works as-is for the system-dependent memory managers supplied
+ * in the IJG distribution.  You may need to modify it if you write a
+ * custom memory manager.  If system-dependent changes are needed in
+ * this file, the best method is to #ifdef them based on a configuration
+ * symbol supplied in jconfig.h, as we have done with USE_MSDOS_MEMMGR
+ * and USE_MAC_MEMMGR.
+ */
+
+
+/* Short forms of external names for systems with brain-damaged linkers. */
+
+#ifdef NEED_SHORT_EXTERNAL_NAMES
+#define jpeg_get_small		jGetSmall
+#define jpeg_free_small		jFreeSmall
+#define jpeg_get_large		jGetLarge
+#define jpeg_free_large		jFreeLarge
+#define jpeg_mem_available	jMemAvail
+#define jpeg_open_backing_store	jOpenBackStore
+#define jpeg_mem_init		jMemInit
+#define jpeg_mem_term		jMemTerm
+#endif /* NEED_SHORT_EXTERNAL_NAMES */
+
+
+/*
+ * These two functions are used to allocate and release small chunks of
+ * memory.  (Typically the total amount requested through jpeg_get_small is
+ * no more than 20K or so; this will be requested in chunks of a few K each.)
+ * Behavior should be the same as for the standard library functions malloc
+ * and free; in particular, jpeg_get_small must return NULL on failure.
+ * On most systems, these ARE malloc and free.  jpeg_free_small is passed the
+ * size of the object being freed, just in case it's needed.
+ * On an 80x86 machine using small-data memory model, these manage near heap.
+ */
+
+EXTERN(void *) jpeg_get_small JPP((j_common_ptr cinfo, size_t sizeofobject));
+EXTERN(void) jpeg_free_small JPP((j_common_ptr cinfo, void * object,
+				  size_t sizeofobject));
+
+/*
+ * These two functions are used to allocate and release large chunks of
+ * memory (up to the total free space designated by jpeg_mem_available).
+ * The interface is the same as above, except that on an 80x86 machine,
+ * far pointers are used.  On most other machines these are identical to
+ * the jpeg_get/free_small routines; but we keep them separate anyway,
+ * in case a different allocation strategy is desirable for large chunks.
+ */
+
+EXTERN(void FAR *) jpeg_get_large JPP((j_common_ptr cinfo,
+				       size_t sizeofobject));
+EXTERN(void) jpeg_free_large JPP((j_common_ptr cinfo, void FAR * object,
+				  size_t sizeofobject));
+
+/*
+ * The macro MAX_ALLOC_CHUNK designates the maximum number of bytes that may
+ * be requested in a single call to jpeg_get_large (and jpeg_get_small for that
+ * matter, but that case should never come into play).  This macro is needed
+ * to model the 64Kb-segment-size limit of far addressing on 80x86 machines.
+ * On those machines, we expect that jconfig.h will provide a proper value.
+ * On machines with 32-bit flat address spaces, any large constant may be used.
+ *
+ * NB: jmemmgr.c expects that MAX_ALLOC_CHUNK will be representable as type
+ * size_t and will be a multiple of sizeof(align_type).
+ */
+
+#ifndef MAX_ALLOC_CHUNK		/* may be overridden in jconfig.h */
+#define MAX_ALLOC_CHUNK  1000000000L
+#endif
+
+/*
+ * This routine computes the total space still available for allocation by
+ * jpeg_get_large.  If more space than this is needed, backing store will be
+ * used.  NOTE: any memory already allocated must not be counted.
+ *
+ * There is a minimum space requirement, corresponding to the minimum
+ * feasible buffer sizes; jmemmgr.c will request that much space even if
+ * jpeg_mem_available returns zero.  The maximum space needed, enough to hold
+ * all working storage in memory, is also passed in case it is useful.
+ * Finally, the total space already allocated is passed.  If no better
+ * method is available, cinfo->mem->max_memory_to_use - already_allocated
+ * is often a suitable calculation.
+ *
+ * It is OK for jpeg_mem_available to underestimate the space available
+ * (that'll just lead to more backing-store access than is really necessary).
+ * However, an overestimate will lead to failure.  Hence it's wise to subtract
+ * a slop factor from the true available space.  5% should be enough.
+ *
+ * On machines with lots of virtual memory, any large constant may be returned.
+ * Conversely, zero may be returned to always use the minimum amount of memory.
+ */
+
+EXTERN(long) jpeg_mem_available JPP((j_common_ptr cinfo,
+				     long min_bytes_needed,
+				     long max_bytes_needed,
+				     long already_allocated));
+
+
+/*
+ * This structure holds whatever state is needed to access a single
+ * backing-store object.  The read/write/close method pointers are called
+ * by jmemmgr.c to manipulate the backing-store object; all other fields
+ * are private to the system-dependent backing store routines.
+ */
+
+#define TEMP_NAME_LENGTH   64	/* max length of a temporary file's name */
+
+
+#ifdef USE_MSDOS_MEMMGR		/* DOS-specific junk */
+
+typedef unsigned short XMSH;	/* type of extended-memory handles */
+typedef unsigned short EMSH;	/* type of expanded-memory handles */
+
+typedef union {
+  short file_handle;		/* DOS file handle if it's a temp file */
+  XMSH xms_handle;		/* handle if it's a chunk of XMS */
+  EMSH ems_handle;		/* handle if it's a chunk of EMS */
+} handle_union;
+
+#endif /* USE_MSDOS_MEMMGR */
+
+#ifdef USE_MAC_MEMMGR		/* Mac-specific junk */
+#include <Files.h>
+#endif /* USE_MAC_MEMMGR */
+
+
+typedef struct backing_store_struct * backing_store_ptr;
+
+typedef struct backing_store_struct {
+  /* Methods for reading/writing/closing this backing-store object */
+  JMETHOD(void, read_backing_store, (j_common_ptr cinfo,
+				     backing_store_ptr info,
+				     void FAR * buffer_address,
+				     long file_offset, long byte_count));
+  JMETHOD(void, write_backing_store, (j_common_ptr cinfo,
+				      backing_store_ptr info,
+				      void FAR * buffer_address,
+				      long file_offset, long byte_count));
+  JMETHOD(void, close_backing_store, (j_common_ptr cinfo,
+				      backing_store_ptr info));
+
+  /* Private fields for system-dependent backing-store management */
+#ifdef USE_MSDOS_MEMMGR
+  /* For the MS-DOS manager (jmemdos.c), we need: */
+  handle_union handle;		/* reference to backing-store storage object */
+  char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */
+#else
+#ifdef USE_MAC_MEMMGR
+  /* For the Mac manager (jmemmac.c), we need: */
+  short temp_file;		/* file reference number to temp file */
+  FSSpec tempSpec;		/* the FSSpec for the temp file */
+  char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */
+#else
+  /* For a typical implementation with temp files, we need: */
+  FILE * temp_file;		/* stdio reference to temp file */
+  char temp_name[TEMP_NAME_LENGTH]; /* name of temp file */
+#endif
+#endif
+} backing_store_info;
+
+
+/*
+ * Initial opening of a backing-store object.  This must fill in the
+ * read/write/close pointers in the object.  The read/write routines
+ * may take an error exit if the specified maximum file size is exceeded.
+ * (If jpeg_mem_available always returns a large value, this routine can
+ * just take an error exit.)
+ */
+
+EXTERN(void) jpeg_open_backing_store JPP((j_common_ptr cinfo,
+					  backing_store_ptr info,
+					  long total_bytes_needed));
+
+
+/*
+ * These routines take care of any system-dependent initialization and
+ * cleanup required.  jpeg_mem_init will be called before anything is
+ * allocated (and, therefore, nothing in cinfo is of use except the error
+ * manager pointer).  It should return a suitable default value for
+ * max_memory_to_use; this may subsequently be overridden by the surrounding
+ * application.  (Note that max_memory_to_use is only important if
+ * jpeg_mem_available chooses to consult it ... no one else will.)
+ * jpeg_mem_term may assume that all requested memory has been freed and that
+ * all opened backing-store objects have been closed.
+ */
+
+EXTERN(long) jpeg_mem_init JPP((j_common_ptr cinfo));
+EXTERN(void) jpeg_mem_term JPP((j_common_ptr cinfo));
diff --git a/common/jpeg/jmorecfg.h b/common/jpeg/jmorecfg.h
new file mode 100644
index 00000000..54a7d1c4
--- /dev/null
+++ b/common/jpeg/jmorecfg.h
@@ -0,0 +1,363 @@
+/*
+ * jmorecfg.h
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains additional configuration options that customize the
+ * JPEG software for special applications or support machine-dependent
+ * optimizations.  Most users will not need to touch this file.
+ */
+
+
+/*
+ * Define BITS_IN_JSAMPLE as either
+ *   8   for 8-bit sample values (the usual setting)
+ *   12  for 12-bit sample values
+ * Only 8 and 12 are legal data precisions for lossy JPEG according to the
+ * JPEG standard, and the IJG code does not support anything else!
+ * We do not support run-time selection of data precision, sorry.
+ */
+
+#define BITS_IN_JSAMPLE  8	/* use 8 or 12 */
+
+
+/*
+ * Maximum number of components (color channels) allowed in JPEG image.
+ * To meet the letter of the JPEG spec, set this to 255.  However, darn
+ * few applications need more than 4 channels (maybe 5 for CMYK + alpha
+ * mask).  We recommend 10 as a reasonable compromise; use 4 if you are
+ * really short on memory.  (Each allowed component costs a hundred or so
+ * bytes of storage, whether actually used in an image or not.)
+ */
+
+#define MAX_COMPONENTS  10	/* maximum number of image components */
+
+
+/*
+ * Basic data types.
+ * You may need to change these if you have a machine with unusual data
+ * type sizes; for example, "char" not 8 bits, "short" not 16 bits,
+ * or "long" not 32 bits.  We don't care whether "int" is 16 or 32 bits,
+ * but it had better be at least 16.
+ */
+
+/* Representation of a single sample (pixel element value).
+ * We frequently allocate large arrays of these, so it's important to keep
+ * them small.  But if you have memory to burn and access to char or short
+ * arrays is very slow on your hardware, you might want to change these.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+/* JSAMPLE should be the smallest type that will hold the values 0..255.
+ * You can use a signed char by having GETJSAMPLE mask it with 0xFF.
+ */
+
+#ifdef HAVE_UNSIGNED_CHAR
+
+typedef unsigned char JSAMPLE;
+#define GETJSAMPLE(value)  ((int) (value))
+
+#else /* not HAVE_UNSIGNED_CHAR */
+
+typedef char JSAMPLE;
+#ifdef CHAR_IS_UNSIGNED
+#define GETJSAMPLE(value)  ((int) (value))
+#else
+#define GETJSAMPLE(value)  ((int) (value) & 0xFF)
+#endif /* CHAR_IS_UNSIGNED */
+
+#endif /* HAVE_UNSIGNED_CHAR */
+
+#define MAXJSAMPLE	255
+#define CENTERJSAMPLE	128
+
+#endif /* BITS_IN_JSAMPLE == 8 */
+
+
+#if BITS_IN_JSAMPLE == 12
+/* JSAMPLE should be the smallest type that will hold the values 0..4095.
+ * On nearly all machines "short" will do nicely.
+ */
+
+typedef short JSAMPLE;
+#define GETJSAMPLE(value)  ((int) (value))
+
+#define MAXJSAMPLE	4095
+#define CENTERJSAMPLE	2048
+
+#endif /* BITS_IN_JSAMPLE == 12 */
+
+
+/* Representation of a DCT frequency coefficient.
+ * This should be a signed value of at least 16 bits; "short" is usually OK.
+ * Again, we allocate large arrays of these, but you can change to int
+ * if you have memory to burn and "short" is really slow.
+ */
+
+typedef short JCOEF;
+
+
+/* Compressed datastreams are represented as arrays of JOCTET.
+ * These must be EXACTLY 8 bits wide, at least once they are written to
+ * external storage.  Note that when using the stdio data source/destination
+ * managers, this is also the data type passed to fread/fwrite.
+ */
+
+#ifdef HAVE_UNSIGNED_CHAR
+
+typedef unsigned char JOCTET;
+#define GETJOCTET(value)  (value)
+
+#else /* not HAVE_UNSIGNED_CHAR */
+
+typedef char JOCTET;
+#ifdef CHAR_IS_UNSIGNED
+#define GETJOCTET(value)  (value)
+#else
+#define GETJOCTET(value)  ((value) & 0xFF)
+#endif /* CHAR_IS_UNSIGNED */
+
+#endif /* HAVE_UNSIGNED_CHAR */
+
+
+/* These typedefs are used for various table entries and so forth.
+ * They must be at least as wide as specified; but making them too big
+ * won't cost a huge amount of memory, so we don't provide special
+ * extraction code like we did for JSAMPLE.  (In other words, these
+ * typedefs live at a different point on the speed/space tradeoff curve.)
+ */
+
+/* UINT8 must hold at least the values 0..255. */
+
+#ifdef HAVE_UNSIGNED_CHAR
+typedef unsigned char UINT8;
+#else /* not HAVE_UNSIGNED_CHAR */
+#ifdef CHAR_IS_UNSIGNED
+typedef char UINT8;
+#else /* not CHAR_IS_UNSIGNED */
+typedef short UINT8;
+#endif /* CHAR_IS_UNSIGNED */
+#endif /* HAVE_UNSIGNED_CHAR */
+
+/* UINT16 must hold at least the values 0..65535. */
+
+#ifdef HAVE_UNSIGNED_SHORT
+typedef unsigned short UINT16;
+#else /* not HAVE_UNSIGNED_SHORT */
+typedef unsigned int UINT16;
+#endif /* HAVE_UNSIGNED_SHORT */
+
+/* INT16 must hold at least the values -32768..32767. */
+
+#ifndef XMD_H			/* X11/xmd.h correctly defines INT16 */
+typedef short INT16;
+#endif
+
+/* INT32 must hold at least signed 32-bit values. */
+
+#ifndef XMD_H			/* X11/xmd.h correctly defines INT32 */
+typedef long INT32;
+#endif
+
+/* Datatype used for image dimensions.  The JPEG standard only supports
+ * images up to 64K*64K due to 16-bit fields in SOF markers.  Therefore
+ * "unsigned int" is sufficient on all machines.  However, if you need to
+ * handle larger images and you don't mind deviating from the spec, you
+ * can change this datatype.
+ */
+
+typedef unsigned int JDIMENSION;
+
+#define JPEG_MAX_DIMENSION  65500L  /* a tad under 64K to prevent overflows */
+
+
+/* These macros are used in all function definitions and extern declarations.
+ * You could modify them if you need to change function linkage conventions;
+ * in particular, you'll need to do that to make the library a Windows DLL.
+ * Another application is to make all functions global for use with debuggers
+ * or code profilers that require it.
+ */
+
+/* a function called through method pointers: */
+#define METHODDEF(type)		static type
+/* a function used only in its module: */
+#define LOCAL(type)		static type
+/* a function referenced thru EXTERNs: */
+#define GLOBAL(type)		type
+/* a reference to a GLOBAL function: */
+#define EXTERN(type)		extern type
+
+
+/* This macro is used to declare a "method", that is, a function pointer.
+ * We want to supply prototype parameters if the compiler can cope.
+ * Note that the arglist parameter must be parenthesized!
+ * Again, you can customize this if you need special linkage keywords.
+ */
+
+#ifdef HAVE_PROTOTYPES
+#define JMETHOD(type,methodname,arglist)  type (*methodname) arglist
+#else
+#define JMETHOD(type,methodname,arglist)  type (*methodname) ()
+#endif
+
+
+/* Here is the pseudo-keyword for declaring pointers that must be "far"
+ * on 80x86 machines.  Most of the specialized coding for 80x86 is handled
+ * by just saying "FAR *" where such a pointer is needed.  In a few places
+ * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.
+ */
+
+#ifdef NEED_FAR_POINTERS
+#define FAR  far
+#else
+#define FAR
+#endif
+
+
+/*
+ * On a few systems, type boolean and/or its values FALSE, TRUE may appear
+ * in standard header files.  Or you may have conflicts with application-
+ * specific header files that you want to include together with these files.
+ * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
+ */
+
+#ifndef HAVE_BOOLEAN
+typedef int boolean;
+#endif
+#ifndef FALSE			/* in case these macros already exist */
+#define FALSE	0		/* values of boolean */
+#endif
+#ifndef TRUE
+#define TRUE	1
+#endif
+
+
+/*
+ * The remaining options affect code selection within the JPEG library,
+ * but they don't need to be visible to most applications using the library.
+ * To minimize application namespace pollution, the symbols won't be
+ * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
+ */
+
+#ifdef JPEG_INTERNALS
+#define JPEG_INTERNAL_OPTIONS
+#endif
+
+#ifdef JPEG_INTERNAL_OPTIONS
+
+
+/*
+ * These defines indicate whether to include various optional functions.
+ * Undefining some of these symbols will produce a smaller but less capable
+ * library.  Note that you can leave certain source files out of the
+ * compilation/linking process if you've #undef'd the corresponding symbols.
+ * (You may HAVE to do that if your compiler doesn't like null source files.)
+ */
+
+/* Arithmetic coding is unsupported for legal reasons.  Complaints to IBM. */
+
+/* Capability options common to encoder and decoder: */
+
+#define DCT_ISLOW_SUPPORTED	/* slow but accurate integer algorithm */
+#define DCT_IFAST_SUPPORTED	/* faster, less accurate integer method */
+#define DCT_FLOAT_SUPPORTED	/* floating-point: accurate, fast on fast HW */
+
+/* Encoder capability options: */
+
+#undef  C_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
+#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
+#define C_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
+#define ENTROPY_OPT_SUPPORTED	    /* Optimization of entropy coding parms? */
+/* Note: if you selected 12-bit data precision, it is dangerous to turn off
+ * ENTROPY_OPT_SUPPORTED.  The standard Huffman tables are only good for 8-bit
+ * precision, so jchuff.c normally uses entropy optimization to compute
+ * usable tables for higher precision.  If you don't want to do optimization,
+ * you'll have to supply different default Huffman tables.
+ * The exact same statements apply for progressive JPEG: the default tables
+ * don't work for progressive mode.  (This may get fixed, however.)
+ */
+#define INPUT_SMOOTHING_SUPPORTED   /* Input image smoothing option? */
+
+/* Decoder capability options: */
+
+#undef  D_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
+#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
+#define D_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
+#define SAVE_MARKERS_SUPPORTED	    /* jpeg_save_markers() needed? */
+#define BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */
+#define IDCT_SCALING_SUPPORTED	    /* Output rescaling via IDCT? */
+#undef  UPSAMPLE_SCALING_SUPPORTED  /* Output rescaling at upsample stage? */
+#define UPSAMPLE_MERGING_SUPPORTED  /* Fast path for sloppy upsampling? */
+#define QUANT_1PASS_SUPPORTED	    /* 1-pass color quantization? */
+#define QUANT_2PASS_SUPPORTED	    /* 2-pass color quantization? */
+
+/* more capability options later, no doubt */
+
+
+/*
+ * Ordering of RGB data in scanlines passed to or from the application.
+ * If your application wants to deal with data in the order B,G,R, just
+ * change these macros.  You can also deal with formats such as R,G,B,X
+ * (one extra byte per pixel) by changing RGB_PIXELSIZE.  Note that changing
+ * the offsets will also change the order in which colormap data is organized.
+ * RESTRICTIONS:
+ * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.
+ * 2. These macros only affect RGB<=>YCbCr color conversion, so they are not
+ *    useful if you are using JPEG color spaces other than YCbCr or grayscale.
+ * 3. The color quantizer modules will not behave desirably if RGB_PIXELSIZE
+ *    is not 3 (they don't understand about dummy color components!).  So you
+ *    can't use color quantization if you change that value.
+ */
+
+#define RGB_RED		0	/* Offset of Red in an RGB scanline element */
+#define RGB_GREEN	1	/* Offset of Green */
+#define RGB_BLUE	2	/* Offset of Blue */
+#define RGB_PIXELSIZE	3	/* JSAMPLEs per RGB scanline element */
+
+
+/* Definitions for speed-related optimizations. */
+
+
+/* If your compiler supports inline functions, define INLINE
+ * as the inline keyword; otherwise define it as empty.
+ */
+
+#ifndef INLINE
+#ifdef __GNUC__			/* for instance, GNU C knows about inline */
+#define INLINE __inline__
+#endif
+#ifndef INLINE
+#define INLINE			/* default is to define it as empty */
+#endif
+#endif
+
+
+/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
+ * two 16-bit shorts is faster than multiplying two ints.  Define MULTIPLIER
+ * as short on such a machine.  MULTIPLIER must be at least 16 bits wide.
+ */
+
+#ifndef MULTIPLIER
+#define MULTIPLIER  int		/* type for fastest integer multiply */
+#endif
+
+
+/* FAST_FLOAT should be either float or double, whichever is done faster
+ * by your compiler.  (Note that this type is only used in the floating point
+ * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
+ * Typically, float is faster in ANSI C compilers, while double is faster in
+ * pre-ANSI compilers (because they insist on converting to double anyway).
+ * The code below therefore chooses float if we have ANSI-style prototypes.
+ */
+
+#ifndef FAST_FLOAT
+#ifdef HAVE_PROTOTYPES
+#define FAST_FLOAT  float
+#else
+#define FAST_FLOAT  double
+#endif
+#endif
+
+#endif /* JPEG_INTERNAL_OPTIONS */
diff --git a/common/jpeg/jpeg.dsp b/common/jpeg/jpeg.dsp
new file mode 100644
index 00000000..c5685926
--- /dev/null
+++ b/common/jpeg/jpeg.dsp
@@ -0,0 +1,320 @@
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+

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+

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+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "jpeg.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

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+!MESSAGE Possible choices for configuration are:

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+

+!IF  "$(CFG)" == "jpeg - Win32 Release"

+

+# PROP BASE Use_MFC 0

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+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

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+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_MBCS" /D "_LIB" /YX /FD /c

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+# ADD BASE LIB32 /nologo

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+

+!ENDIF 

+

+# Begin Target

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+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

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+# End Source File

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+# End Source File

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+# End Source File

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+# End Source File

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+# End Source File

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+# End Source File

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+# End Source File

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+# End Source File

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+# End Source File

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+# End Source File

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+# End Source File

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diff --git a/common/jpeg/jpegint.h b/common/jpeg/jpegint.h
new file mode 100644
index 00000000..95b00d40
--- /dev/null
+++ b/common/jpeg/jpegint.h
@@ -0,0 +1,392 @@
+/*
+ * jpegint.h
+ *
+ * Copyright (C) 1991-1997, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file provides common declarations for the various JPEG modules.
+ * These declarations are considered internal to the JPEG library; most
+ * applications using the library shouldn't need to include this file.
+ */
+
+
+/* Declarations for both compression & decompression */
+
+typedef enum {			/* Operating modes for buffer controllers */
+	JBUF_PASS_THRU,		/* Plain stripwise operation */
+	/* Remaining modes require a full-image buffer to have been created */
+	JBUF_SAVE_SOURCE,	/* Run source subobject only, save output */
+	JBUF_CRANK_DEST,	/* Run dest subobject only, using saved data */
+	JBUF_SAVE_AND_PASS	/* Run both subobjects, save output */
+} J_BUF_MODE;
+
+/* Values of global_state field (jdapi.c has some dependencies on ordering!) */
+#define CSTATE_START	100	/* after create_compress */
+#define CSTATE_SCANNING	101	/* start_compress done, write_scanlines OK */
+#define CSTATE_RAW_OK	102	/* start_compress done, write_raw_data OK */
+#define CSTATE_WRCOEFS	103	/* jpeg_write_coefficients done */
+#define DSTATE_START	200	/* after create_decompress */
+#define DSTATE_INHEADER	201	/* reading header markers, no SOS yet */
+#define DSTATE_READY	202	/* found SOS, ready for start_decompress */
+#define DSTATE_PRELOAD	203	/* reading multiscan file in start_decompress*/
+#define DSTATE_PRESCAN	204	/* performing dummy pass for 2-pass quant */
+#define DSTATE_SCANNING	205	/* start_decompress done, read_scanlines OK */
+#define DSTATE_RAW_OK	206	/* start_decompress done, read_raw_data OK */
+#define DSTATE_BUFIMAGE	207	/* expecting jpeg_start_output */
+#define DSTATE_BUFPOST	208	/* looking for SOS/EOI in jpeg_finish_output */
+#define DSTATE_RDCOEFS	209	/* reading file in jpeg_read_coefficients */
+#define DSTATE_STOPPING	210	/* looking for EOI in jpeg_finish_decompress */
+
+
+/* Declarations for compression modules */
+
+/* Master control module */
+struct jpeg_comp_master {
+  JMETHOD(void, prepare_for_pass, (j_compress_ptr cinfo));
+  JMETHOD(void, pass_startup, (j_compress_ptr cinfo));
+  JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
+
+  /* State variables made visible to other modules */
+  boolean call_pass_startup;	/* True if pass_startup must be called */
+  boolean is_last_pass;		/* True during last pass */
+};
+
+/* Main buffer control (downsampled-data buffer) */
+struct jpeg_c_main_controller {
+  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
+  JMETHOD(void, process_data, (j_compress_ptr cinfo,
+			       JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
+			       JDIMENSION in_rows_avail));
+};
+
+/* Compression preprocessing (downsampling input buffer control) */
+struct jpeg_c_prep_controller {
+  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
+  JMETHOD(void, pre_process_data, (j_compress_ptr cinfo,
+				   JSAMPARRAY input_buf,
+				   JDIMENSION *in_row_ctr,
+				   JDIMENSION in_rows_avail,
+				   JSAMPIMAGE output_buf,
+				   JDIMENSION *out_row_group_ctr,
+				   JDIMENSION out_row_groups_avail));
+};
+
+/* Coefficient buffer control */
+struct jpeg_c_coef_controller {
+  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
+  JMETHOD(boolean, compress_data, (j_compress_ptr cinfo,
+				   JSAMPIMAGE input_buf));
+};
+
+/* Colorspace conversion */
+struct jpeg_color_converter {
+  JMETHOD(void, start_pass, (j_compress_ptr cinfo));
+  JMETHOD(void, color_convert, (j_compress_ptr cinfo,
+				JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+				JDIMENSION output_row, int num_rows));
+};
+
+/* Downsampling */
+struct jpeg_downsampler {
+  JMETHOD(void, start_pass, (j_compress_ptr cinfo));
+  JMETHOD(void, downsample, (j_compress_ptr cinfo,
+			     JSAMPIMAGE input_buf, JDIMENSION in_row_index,
+			     JSAMPIMAGE output_buf,
+			     JDIMENSION out_row_group_index));
+
+  boolean need_context_rows;	/* TRUE if need rows above & below */
+};
+
+/* Forward DCT (also controls coefficient quantization) */
+struct jpeg_forward_dct {
+  JMETHOD(void, start_pass, (j_compress_ptr cinfo));
+  /* perhaps this should be an array??? */
+  JMETHOD(void, forward_DCT, (j_compress_ptr cinfo,
+			      jpeg_component_info * compptr,
+			      JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
+			      JDIMENSION start_row, JDIMENSION start_col,
+			      JDIMENSION num_blocks));
+};
+
+/* Entropy encoding */
+struct jpeg_entropy_encoder {
+  JMETHOD(void, start_pass, (j_compress_ptr cinfo, boolean gather_statistics));
+  JMETHOD(boolean, encode_mcu, (j_compress_ptr cinfo, JBLOCKROW *MCU_data));
+  JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
+};
+
+/* Marker writing */
+struct jpeg_marker_writer {
+  JMETHOD(void, write_file_header, (j_compress_ptr cinfo));
+  JMETHOD(void, write_frame_header, (j_compress_ptr cinfo));
+  JMETHOD(void, write_scan_header, (j_compress_ptr cinfo));
+  JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo));
+  JMETHOD(void, write_tables_only, (j_compress_ptr cinfo));
+  /* These routines are exported to allow insertion of extra markers */
+  /* Probably only COM and APPn markers should be written this way */
+  JMETHOD(void, write_marker_header, (j_compress_ptr cinfo, int marker,
+				      unsigned int datalen));
+  JMETHOD(void, write_marker_byte, (j_compress_ptr cinfo, int val));
+};
+
+
+/* Declarations for decompression modules */
+
+/* Master control module */
+struct jpeg_decomp_master {
+  JMETHOD(void, prepare_for_output_pass, (j_decompress_ptr cinfo));
+  JMETHOD(void, finish_output_pass, (j_decompress_ptr cinfo));
+
+  /* State variables made visible to other modules */
+  boolean is_dummy_pass;	/* True during 1st pass for 2-pass quant */
+};
+
+/* Input control module */
+struct jpeg_input_controller {
+  JMETHOD(int, consume_input, (j_decompress_ptr cinfo));
+  JMETHOD(void, reset_input_controller, (j_decompress_ptr cinfo));
+  JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
+  JMETHOD(void, finish_input_pass, (j_decompress_ptr cinfo));
+
+  /* State variables made visible to other modules */
+  boolean has_multiple_scans;	/* True if file has multiple scans */
+  boolean eoi_reached;		/* True when EOI has been consumed */
+};
+
+/* Main buffer control (downsampled-data buffer) */
+struct jpeg_d_main_controller {
+  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
+  JMETHOD(void, process_data, (j_decompress_ptr cinfo,
+			       JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+			       JDIMENSION out_rows_avail));
+};
+
+/* Coefficient buffer control */
+struct jpeg_d_coef_controller {
+  JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
+  JMETHOD(int, consume_data, (j_decompress_ptr cinfo));
+  JMETHOD(void, start_output_pass, (j_decompress_ptr cinfo));
+  JMETHOD(int, decompress_data, (j_decompress_ptr cinfo,
+				 JSAMPIMAGE output_buf));
+  /* Pointer to array of coefficient virtual arrays, or NULL if none */
+  jvirt_barray_ptr *coef_arrays;
+};
+
+/* Decompression postprocessing (color quantization buffer control) */
+struct jpeg_d_post_controller {
+  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
+  JMETHOD(void, post_process_data, (j_decompress_ptr cinfo,
+				    JSAMPIMAGE input_buf,
+				    JDIMENSION *in_row_group_ctr,
+				    JDIMENSION in_row_groups_avail,
+				    JSAMPARRAY output_buf,
+				    JDIMENSION *out_row_ctr,
+				    JDIMENSION out_rows_avail));
+};
+
+/* Marker reading & parsing */
+struct jpeg_marker_reader {
+  JMETHOD(void, reset_marker_reader, (j_decompress_ptr cinfo));
+  /* Read markers until SOS or EOI.
+   * Returns same codes as are defined for jpeg_consume_input:
+   * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
+   */
+  JMETHOD(int, read_markers, (j_decompress_ptr cinfo));
+  /* Read a restart marker --- exported for use by entropy decoder only */
+  jpeg_marker_parser_method read_restart_marker;
+
+  /* State of marker reader --- nominally internal, but applications
+   * supplying COM or APPn handlers might like to know the state.
+   */
+  boolean saw_SOI;		/* found SOI? */
+  boolean saw_SOF;		/* found SOF? */
+  int next_restart_num;		/* next restart number expected (0-7) */
+  unsigned int discarded_bytes;	/* # of bytes skipped looking for a marker */
+};
+
+/* Entropy decoding */
+struct jpeg_entropy_decoder {
+  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
+  JMETHOD(boolean, decode_mcu, (j_decompress_ptr cinfo,
+				JBLOCKROW *MCU_data));
+
+  /* This is here to share code between baseline and progressive decoders; */
+  /* other modules probably should not use it */
+  boolean insufficient_data;	/* set TRUE after emitting warning */
+};
+
+/* Inverse DCT (also performs dequantization) */
+typedef JMETHOD(void, inverse_DCT_method_ptr,
+		(j_decompress_ptr cinfo, jpeg_component_info * compptr,
+		 JCOEFPTR coef_block,
+		 JSAMPARRAY output_buf, JDIMENSION output_col));
+
+struct jpeg_inverse_dct {
+  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
+  /* It is useful to allow each component to have a separate IDCT method. */
+  inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];
+};
+
+/* Upsampling (note that upsampler must also call color converter) */
+struct jpeg_upsampler {
+  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
+  JMETHOD(void, upsample, (j_decompress_ptr cinfo,
+			   JSAMPIMAGE input_buf,
+			   JDIMENSION *in_row_group_ctr,
+			   JDIMENSION in_row_groups_avail,
+			   JSAMPARRAY output_buf,
+			   JDIMENSION *out_row_ctr,
+			   JDIMENSION out_rows_avail));
+
+  boolean need_context_rows;	/* TRUE if need rows above & below */
+};
+
+/* Colorspace conversion */
+struct jpeg_color_deconverter {
+  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
+  JMETHOD(void, color_convert, (j_decompress_ptr cinfo,
+				JSAMPIMAGE input_buf, JDIMENSION input_row,
+				JSAMPARRAY output_buf, int num_rows));
+};
+
+/* Color quantization or color precision reduction */
+struct jpeg_color_quantizer {
+  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, boolean is_pre_scan));
+  JMETHOD(void, color_quantize, (j_decompress_ptr cinfo,
+				 JSAMPARRAY input_buf, JSAMPARRAY output_buf,
+				 int num_rows));
+  JMETHOD(void, finish_pass, (j_decompress_ptr cinfo));
+  JMETHOD(void, new_color_map, (j_decompress_ptr cinfo));
+};
+
+
+/* Miscellaneous useful macros */
+
+#undef MAX
+#define MAX(a,b)	((a) > (b) ? (a) : (b))
+#undef MIN
+#define MIN(a,b)	((a) < (b) ? (a) : (b))
+
+
+/* We assume that right shift corresponds to signed division by 2 with
+ * rounding towards minus infinity.  This is correct for typical "arithmetic
+ * shift" instructions that shift in copies of the sign bit.  But some
+ * C compilers implement >> with an unsigned shift.  For these machines you
+ * must define RIGHT_SHIFT_IS_UNSIGNED.
+ * RIGHT_SHIFT provides a proper signed right shift of an INT32 quantity.
+ * It is only applied with constant shift counts.  SHIFT_TEMPS must be
+ * included in the variables of any routine using RIGHT_SHIFT.
+ */
+
+#ifdef RIGHT_SHIFT_IS_UNSIGNED
+#define SHIFT_TEMPS	INT32 shift_temp;
+#define RIGHT_SHIFT(x,shft)  \
+	((shift_temp = (x)) < 0 ? \
+	 (shift_temp >> (shft)) | ((~((INT32) 0)) << (32-(shft))) : \
+	 (shift_temp >> (shft)))
+#else
+#define SHIFT_TEMPS
+#define RIGHT_SHIFT(x,shft)	((x) >> (shft))
+#endif
+
+
+/* Short forms of external names for systems with brain-damaged linkers. */
+
+#ifdef NEED_SHORT_EXTERNAL_NAMES
+#define jinit_compress_master	jICompress
+#define jinit_c_master_control	jICMaster
+#define jinit_c_main_controller	jICMainC
+#define jinit_c_prep_controller	jICPrepC
+#define jinit_c_coef_controller	jICCoefC
+#define jinit_color_converter	jICColor
+#define jinit_downsampler	jIDownsampler
+#define jinit_forward_dct	jIFDCT
+#define jinit_huff_encoder	jIHEncoder
+#define jinit_phuff_encoder	jIPHEncoder
+#define jinit_marker_writer	jIMWriter
+#define jinit_master_decompress	jIDMaster
+#define jinit_d_main_controller	jIDMainC
+#define jinit_d_coef_controller	jIDCoefC
+#define jinit_d_post_controller	jIDPostC
+#define jinit_input_controller	jIInCtlr
+#define jinit_marker_reader	jIMReader
+#define jinit_huff_decoder	jIHDecoder
+#define jinit_phuff_decoder	jIPHDecoder
+#define jinit_inverse_dct	jIIDCT
+#define jinit_upsampler		jIUpsampler
+#define jinit_color_deconverter	jIDColor
+#define jinit_1pass_quantizer	jI1Quant
+#define jinit_2pass_quantizer	jI2Quant
+#define jinit_merged_upsampler	jIMUpsampler
+#define jinit_memory_mgr	jIMemMgr
+#define jdiv_round_up		jDivRound
+#define jround_up		jRound
+#define jcopy_sample_rows	jCopySamples
+#define jcopy_block_row		jCopyBlocks
+#define jzero_far		jZeroFar
+#define jpeg_zigzag_order	jZIGTable
+#define jpeg_natural_order	jZAGTable
+#endif /* NEED_SHORT_EXTERNAL_NAMES */
+
+
+/* Compression module initialization routines */
+EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo,
+					 boolean transcode_only));
+EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_c_prep_controller JPP((j_compress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_color_converter JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_downsampler JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_forward_dct JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_phuff_encoder JPP((j_compress_ptr cinfo));
+EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo));
+/* Decompression module initialization routines */
+EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo,
+					  boolean need_full_buffer));
+EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_marker_reader JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_phuff_decoder JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_upsampler JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_color_deconverter JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_1pass_quantizer JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_2pass_quantizer JPP((j_decompress_ptr cinfo));
+EXTERN(void) jinit_merged_upsampler JPP((j_decompress_ptr cinfo));
+/* Memory manager initialization */
+EXTERN(void) jinit_memory_mgr JPP((j_common_ptr cinfo));
+
+/* Utility routines in jutils.c */
+EXTERN(long) jdiv_round_up JPP((long a, long b));
+EXTERN(long) jround_up JPP((long a, long b));
+EXTERN(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row,
+				    JSAMPARRAY output_array, int dest_row,
+				    int num_rows, JDIMENSION num_cols));
+EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row,
+				  JDIMENSION num_blocks));
+EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero));
+/* Constant tables in jutils.c */
+#if 0				/* This table is not actually needed in v6a */
+extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
+#endif
+extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */
+
+/* Suppress undefined-structure complaints if necessary. */
+
+#ifdef INCOMPLETE_TYPES_BROKEN
+#ifndef AM_MEMORY_MANAGER	/* only jmemmgr.c defines these */
+struct jvirt_sarray_control { long dummy; };
+struct jvirt_barray_control { long dummy; };
+#endif
+#endif /* INCOMPLETE_TYPES_BROKEN */
diff --git a/common/jpeg/jpeglib.h b/common/jpeg/jpeglib.h
new file mode 100644
index 00000000..d1be8dde
--- /dev/null
+++ b/common/jpeg/jpeglib.h
@@ -0,0 +1,1096 @@
+/*
+ * jpeglib.h
+ *
+ * Copyright (C) 1991-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file defines the application interface for the JPEG library.
+ * Most applications using the library need only include this file,
+ * and perhaps jerror.h if they want to know the exact error codes.
+ */
+
+#ifndef JPEGLIB_H
+#define JPEGLIB_H
+
+/*
+ * First we include the configuration files that record how this
+ * installation of the JPEG library is set up.  jconfig.h can be
+ * generated automatically for many systems.  jmorecfg.h contains
+ * manual configuration options that most people need not worry about.
+ */
+
+#ifndef JCONFIG_INCLUDED	/* in case jinclude.h already did */
+#include "jconfig.h"		/* widely used configuration options */
+#endif
+#include "jmorecfg.h"		/* seldom changed options */
+
+
+/* Version ID for the JPEG library.
+ * Might be useful for tests like "#if JPEG_LIB_VERSION >= 60".
+ */
+
+#define JPEG_LIB_VERSION  62	/* Version 6b */
+
+
+/* Various constants determining the sizes of things.
+ * All of these are specified by the JPEG standard, so don't change them
+ * if you want to be compatible.
+ */
+
+#define DCTSIZE		    8	/* The basic DCT block is 8x8 samples */
+#define DCTSIZE2	    64	/* DCTSIZE squared; # of elements in a block */
+#define NUM_QUANT_TBLS      4	/* Quantization tables are numbered 0..3 */
+#define NUM_HUFF_TBLS       4	/* Huffman tables are numbered 0..3 */
+#define NUM_ARITH_TBLS      16	/* Arith-coding tables are numbered 0..15 */
+#define MAX_COMPS_IN_SCAN   4	/* JPEG limit on # of components in one scan */
+#define MAX_SAMP_FACTOR     4	/* JPEG limit on sampling factors */
+/* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard;
+ * the PostScript DCT filter can emit files with many more than 10 blocks/MCU.
+ * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU
+ * to handle it.  We even let you do this from the jconfig.h file.  However,
+ * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe
+ * sometimes emits noncompliant files doesn't mean you should too.
+ */
+#define C_MAX_BLOCKS_IN_MCU   10 /* compressor's limit on blocks per MCU */
+#ifndef D_MAX_BLOCKS_IN_MCU
+#define D_MAX_BLOCKS_IN_MCU   10 /* decompressor's limit on blocks per MCU */
+#endif
+
+
+/* Data structures for images (arrays of samples and of DCT coefficients).
+ * On 80x86 machines, the image arrays are too big for near pointers,
+ * but the pointer arrays can fit in near memory.
+ */
+
+typedef JSAMPLE FAR *JSAMPROW;	/* ptr to one image row of pixel samples. */
+typedef JSAMPROW *JSAMPARRAY;	/* ptr to some rows (a 2-D sample array) */
+typedef JSAMPARRAY *JSAMPIMAGE;	/* a 3-D sample array: top index is color */
+
+typedef JCOEF JBLOCK[DCTSIZE2];	/* one block of coefficients */
+typedef JBLOCK FAR *JBLOCKROW;	/* pointer to one row of coefficient blocks */
+typedef JBLOCKROW *JBLOCKARRAY;		/* a 2-D array of coefficient blocks */
+typedef JBLOCKARRAY *JBLOCKIMAGE;	/* a 3-D array of coefficient blocks */
+
+typedef JCOEF FAR *JCOEFPTR;	/* useful in a couple of places */
+
+
+/* Types for JPEG compression parameters and working tables. */
+
+
+/* DCT coefficient quantization tables. */
+
+typedef struct {
+  /* This array gives the coefficient quantizers in natural array order
+   * (not the zigzag order in which they are stored in a JPEG DQT marker).
+   * CAUTION: IJG versions prior to v6a kept this array in zigzag order.
+   */
+  UINT16 quantval[DCTSIZE2];	/* quantization step for each coefficient */
+  /* This field is used only during compression.  It's initialized FALSE when
+   * the table is created, and set TRUE when it's been output to the file.
+   * You could suppress output of a table by setting this to TRUE.
+   * (See jpeg_suppress_tables for an example.)
+   */
+  boolean sent_table;		/* TRUE when table has been output */
+} JQUANT_TBL;
+
+
+/* Huffman coding tables. */
+
+typedef struct {
+  /* These two fields directly represent the contents of a JPEG DHT marker */
+  UINT8 bits[17];		/* bits[k] = # of symbols with codes of */
+				/* length k bits; bits[0] is unused */
+  UINT8 huffval[256];		/* The symbols, in order of incr code length */
+  /* This field is used only during compression.  It's initialized FALSE when
+   * the table is created, and set TRUE when it's been output to the file.
+   * You could suppress output of a table by setting this to TRUE.
+   * (See jpeg_suppress_tables for an example.)
+   */
+  boolean sent_table;		/* TRUE when table has been output */
+} JHUFF_TBL;
+
+
+/* Basic info about one component (color channel). */
+
+typedef struct {
+  /* These values are fixed over the whole image. */
+  /* For compression, they must be supplied by parameter setup; */
+  /* for decompression, they are read from the SOF marker. */
+  int component_id;		/* identifier for this component (0..255) */
+  int component_index;		/* its index in SOF or cinfo->comp_info[] */
+  int h_samp_factor;		/* horizontal sampling factor (1..4) */
+  int v_samp_factor;		/* vertical sampling factor (1..4) */
+  int quant_tbl_no;		/* quantization table selector (0..3) */
+  /* These values may vary between scans. */
+  /* For compression, they must be supplied by parameter setup; */
+  /* for decompression, they are read from the SOS marker. */
+  /* The decompressor output side may not use these variables. */
+  int dc_tbl_no;		/* DC entropy table selector (0..3) */
+  int ac_tbl_no;		/* AC entropy table selector (0..3) */
+  
+  /* Remaining fields should be treated as private by applications. */
+  
+  /* These values are computed during compression or decompression startup: */
+  /* Component's size in DCT blocks.
+   * Any dummy blocks added to complete an MCU are not counted; therefore
+   * these values do not depend on whether a scan is interleaved or not.
+   */
+  JDIMENSION width_in_blocks;
+  JDIMENSION height_in_blocks;
+  /* Size of a DCT block in samples.  Always DCTSIZE for compression.
+   * For decompression this is the size of the output from one DCT block,
+   * reflecting any scaling we choose to apply during the IDCT step.
+   * Values of 1,2,4,8 are likely to be supported.  Note that different
+   * components may receive different IDCT scalings.
+   */
+  int DCT_scaled_size;
+  /* The downsampled dimensions are the component's actual, unpadded number
+   * of samples at the main buffer (preprocessing/compression interface), thus
+   * downsampled_width = ceil(image_width * Hi/Hmax)
+   * and similarly for height.  For decompression, IDCT scaling is included, so
+   * downsampled_width = ceil(image_width * Hi/Hmax * DCT_scaled_size/DCTSIZE)
+   */
+  JDIMENSION downsampled_width;	 /* actual width in samples */
+  JDIMENSION downsampled_height; /* actual height in samples */
+  /* This flag is used only for decompression.  In cases where some of the
+   * components will be ignored (eg grayscale output from YCbCr image),
+   * we can skip most computations for the unused components.
+   */
+  boolean component_needed;	/* do we need the value of this component? */
+
+  /* These values are computed before starting a scan of the component. */
+  /* The decompressor output side may not use these variables. */
+  int MCU_width;		/* number of blocks per MCU, horizontally */
+  int MCU_height;		/* number of blocks per MCU, vertically */
+  int MCU_blocks;		/* MCU_width * MCU_height */
+  int MCU_sample_width;		/* MCU width in samples, MCU_width*DCT_scaled_size */
+  int last_col_width;		/* # of non-dummy blocks across in last MCU */
+  int last_row_height;		/* # of non-dummy blocks down in last MCU */
+
+  /* Saved quantization table for component; NULL if none yet saved.
+   * See jdinput.c comments about the need for this information.
+   * This field is currently used only for decompression.
+   */
+  JQUANT_TBL * quant_table;
+
+  /* Private per-component storage for DCT or IDCT subsystem. */
+  void * dct_table;
+} jpeg_component_info;
+
+
+/* The script for encoding a multiple-scan file is an array of these: */
+
+typedef struct {
+  int comps_in_scan;		/* number of components encoded in this scan */
+  int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */
+  int Ss, Se;			/* progressive JPEG spectral selection parms */
+  int Ah, Al;			/* progressive JPEG successive approx. parms */
+} jpeg_scan_info;
+
+/* The decompressor can save APPn and COM markers in a list of these: */
+
+typedef struct jpeg_marker_struct FAR * jpeg_saved_marker_ptr;
+
+struct jpeg_marker_struct {
+  jpeg_saved_marker_ptr next;	/* next in list, or NULL */
+  UINT8 marker;			/* marker code: JPEG_COM, or JPEG_APP0+n */
+  unsigned int original_length;	/* # bytes of data in the file */
+  unsigned int data_length;	/* # bytes of data saved at data[] */
+  JOCTET FAR * data;		/* the data contained in the marker */
+  /* the marker length word is not counted in data_length or original_length */
+};
+
+/* Known color spaces. */
+
+typedef enum {
+	JCS_UNKNOWN,		/* error/unspecified */
+	JCS_GRAYSCALE,		/* monochrome */
+	JCS_RGB,		/* red/green/blue */
+	JCS_YCbCr,		/* Y/Cb/Cr (also known as YUV) */
+	JCS_CMYK,		/* C/M/Y/K */
+	JCS_YCCK		/* Y/Cb/Cr/K */
+} J_COLOR_SPACE;
+
+/* DCT/IDCT algorithm options. */
+
+typedef enum {
+	JDCT_ISLOW,		/* slow but accurate integer algorithm */
+	JDCT_IFAST,		/* faster, less accurate integer method */
+	JDCT_FLOAT		/* floating-point: accurate, fast on fast HW */
+} J_DCT_METHOD;
+
+#ifndef JDCT_DEFAULT		/* may be overridden in jconfig.h */
+#define JDCT_DEFAULT  JDCT_ISLOW
+#endif
+#ifndef JDCT_FASTEST		/* may be overridden in jconfig.h */
+#define JDCT_FASTEST  JDCT_IFAST
+#endif
+
+/* Dithering options for decompression. */
+
+typedef enum {
+	JDITHER_NONE,		/* no dithering */
+	JDITHER_ORDERED,	/* simple ordered dither */
+	JDITHER_FS		/* Floyd-Steinberg error diffusion dither */
+} J_DITHER_MODE;
+
+
+/* Common fields between JPEG compression and decompression master structs. */
+
+#define jpeg_common_fields \
+  struct jpeg_error_mgr * err;	/* Error handler module */\
+  struct jpeg_memory_mgr * mem;	/* Memory manager module */\
+  struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\
+  void * client_data;		/* Available for use by application */\
+  boolean is_decompressor;	/* So common code can tell which is which */\
+  int global_state		/* For checking call sequence validity */
+
+/* Routines that are to be used by both halves of the library are declared
+ * to receive a pointer to this structure.  There are no actual instances of
+ * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct.
+ */
+struct jpeg_common_struct {
+  jpeg_common_fields;		/* Fields common to both master struct types */
+  /* Additional fields follow in an actual jpeg_compress_struct or
+   * jpeg_decompress_struct.  All three structs must agree on these
+   * initial fields!  (This would be a lot cleaner in C++.)
+   */
+};
+
+typedef struct jpeg_common_struct * j_common_ptr;
+typedef struct jpeg_compress_struct * j_compress_ptr;
+typedef struct jpeg_decompress_struct * j_decompress_ptr;
+
+
+/* Master record for a compression instance */
+
+struct jpeg_compress_struct {
+  jpeg_common_fields;		/* Fields shared with jpeg_decompress_struct */
+
+  /* Destination for compressed data */
+  struct jpeg_destination_mgr * dest;
+
+  /* Description of source image --- these fields must be filled in by
+   * outer application before starting compression.  in_color_space must
+   * be correct before you can even call jpeg_set_defaults().
+   */
+
+  JDIMENSION image_width;	/* input image width */
+  JDIMENSION image_height;	/* input image height */
+  int input_components;		/* # of color components in input image */
+  J_COLOR_SPACE in_color_space;	/* colorspace of input image */
+
+  double input_gamma;		/* image gamma of input image */
+
+  /* Compression parameters --- these fields must be set before calling
+   * jpeg_start_compress().  We recommend calling jpeg_set_defaults() to
+   * initialize everything to reasonable defaults, then changing anything
+   * the application specifically wants to change.  That way you won't get
+   * burnt when new parameters are added.  Also note that there are several
+   * helper routines to simplify changing parameters.
+   */
+
+  int data_precision;		/* bits of precision in image data */
+
+  int num_components;		/* # of color components in JPEG image */
+  J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
+
+  jpeg_component_info * comp_info;
+  /* comp_info[i] describes component that appears i'th in SOF */
+  
+  JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
+  /* ptrs to coefficient quantization tables, or NULL if not defined */
+  
+  JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
+  JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
+  /* ptrs to Huffman coding tables, or NULL if not defined */
+  
+  UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
+  UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
+  UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
+
+  int num_scans;		/* # of entries in scan_info array */
+  const jpeg_scan_info * scan_info; /* script for multi-scan file, or NULL */
+  /* The default value of scan_info is NULL, which causes a single-scan
+   * sequential JPEG file to be emitted.  To create a multi-scan file,
+   * set num_scans and scan_info to point to an array of scan definitions.
+   */
+
+  boolean raw_data_in;		/* TRUE=caller supplies downsampled data */
+  boolean arith_code;		/* TRUE=arithmetic coding, FALSE=Huffman */
+  boolean optimize_coding;	/* TRUE=optimize entropy encoding parms */
+  boolean CCIR601_sampling;	/* TRUE=first samples are cosited */
+  int smoothing_factor;		/* 1..100, or 0 for no input smoothing */
+  J_DCT_METHOD dct_method;	/* DCT algorithm selector */
+
+  /* The restart interval can be specified in absolute MCUs by setting
+   * restart_interval, or in MCU rows by setting restart_in_rows
+   * (in which case the correct restart_interval will be figured
+   * for each scan).
+   */
+  unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */
+  int restart_in_rows;		/* if > 0, MCU rows per restart interval */
+
+  /* Parameters controlling emission of special markers. */
+
+  boolean write_JFIF_header;	/* should a JFIF marker be written? */
+  UINT8 JFIF_major_version;	/* What to write for the JFIF version number */
+  UINT8 JFIF_minor_version;
+  /* These three values are not used by the JPEG code, merely copied */
+  /* into the JFIF APP0 marker.  density_unit can be 0 for unknown, */
+  /* 1 for dots/inch, or 2 for dots/cm.  Note that the pixel aspect */
+  /* ratio is defined by X_density/Y_density even when density_unit=0. */
+  UINT8 density_unit;		/* JFIF code for pixel size units */
+  UINT16 X_density;		/* Horizontal pixel density */
+  UINT16 Y_density;		/* Vertical pixel density */
+  boolean write_Adobe_marker;	/* should an Adobe marker be written? */
+  
+  /* State variable: index of next scanline to be written to
+   * jpeg_write_scanlines().  Application may use this to control its
+   * processing loop, e.g., "while (next_scanline < image_height)".
+   */
+
+  JDIMENSION next_scanline;	/* 0 .. image_height-1  */
+
+  /* Remaining fields are known throughout compressor, but generally
+   * should not be touched by a surrounding application.
+   */
+
+  /*
+   * These fields are computed during compression startup
+   */
+  boolean progressive_mode;	/* TRUE if scan script uses progressive mode */
+  int max_h_samp_factor;	/* largest h_samp_factor */
+  int max_v_samp_factor;	/* largest v_samp_factor */
+
+  JDIMENSION total_iMCU_rows;	/* # of iMCU rows to be input to coef ctlr */
+  /* The coefficient controller receives data in units of MCU rows as defined
+   * for fully interleaved scans (whether the JPEG file is interleaved or not).
+   * There are v_samp_factor * DCTSIZE sample rows of each component in an
+   * "iMCU" (interleaved MCU) row.
+   */
+  
+  /*
+   * These fields are valid during any one scan.
+   * They describe the components and MCUs actually appearing in the scan.
+   */
+  int comps_in_scan;		/* # of JPEG components in this scan */
+  jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
+  /* *cur_comp_info[i] describes component that appears i'th in SOS */
+  
+  JDIMENSION MCUs_per_row;	/* # of MCUs across the image */
+  JDIMENSION MCU_rows_in_scan;	/* # of MCU rows in the image */
+  
+  int blocks_in_MCU;		/* # of DCT blocks per MCU */
+  int MCU_membership[C_MAX_BLOCKS_IN_MCU];
+  /* MCU_membership[i] is index in cur_comp_info of component owning */
+  /* i'th block in an MCU */
+
+  int Ss, Se, Ah, Al;		/* progressive JPEG parameters for scan */
+
+  /*
+   * Links to compression subobjects (methods and private variables of modules)
+   */
+  struct jpeg_comp_master * master;
+  struct jpeg_c_main_controller * main;
+  struct jpeg_c_prep_controller * prep;
+  struct jpeg_c_coef_controller * coef;
+  struct jpeg_marker_writer * marker;
+  struct jpeg_color_converter * cconvert;
+  struct jpeg_downsampler * downsample;
+  struct jpeg_forward_dct * fdct;
+  struct jpeg_entropy_encoder * entropy;
+  jpeg_scan_info * script_space; /* workspace for jpeg_simple_progression */
+  int script_space_size;
+};
+
+
+/* Master record for a decompression instance */
+
+struct jpeg_decompress_struct {
+  jpeg_common_fields;		/* Fields shared with jpeg_compress_struct */
+
+  /* Source of compressed data */
+  struct jpeg_source_mgr * src;
+
+  /* Basic description of image --- filled in by jpeg_read_header(). */
+  /* Application may inspect these values to decide how to process image. */
+
+  JDIMENSION image_width;	/* nominal image width (from SOF marker) */
+  JDIMENSION image_height;	/* nominal image height */
+  int num_components;		/* # of color components in JPEG image */
+  J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
+
+  /* Decompression processing parameters --- these fields must be set before
+   * calling jpeg_start_decompress().  Note that jpeg_read_header() initializes
+   * them to default values.
+   */
+
+  J_COLOR_SPACE out_color_space; /* colorspace for output */
+
+  unsigned int scale_num, scale_denom; /* fraction by which to scale image */
+
+  double output_gamma;		/* image gamma wanted in output */
+
+  boolean buffered_image;	/* TRUE=multiple output passes */
+  boolean raw_data_out;		/* TRUE=downsampled data wanted */
+
+  J_DCT_METHOD dct_method;	/* IDCT algorithm selector */
+  boolean do_fancy_upsampling;	/* TRUE=apply fancy upsampling */
+  boolean do_block_smoothing;	/* TRUE=apply interblock smoothing */
+
+  boolean quantize_colors;	/* TRUE=colormapped output wanted */
+  /* the following are ignored if not quantize_colors: */
+  J_DITHER_MODE dither_mode;	/* type of color dithering to use */
+  boolean two_pass_quantize;	/* TRUE=use two-pass color quantization */
+  int desired_number_of_colors;	/* max # colors to use in created colormap */
+  /* these are significant only in buffered-image mode: */
+  boolean enable_1pass_quant;	/* enable future use of 1-pass quantizer */
+  boolean enable_external_quant;/* enable future use of external colormap */
+  boolean enable_2pass_quant;	/* enable future use of 2-pass quantizer */
+
+  /* Description of actual output image that will be returned to application.
+   * These fields are computed by jpeg_start_decompress().
+   * You can also use jpeg_calc_output_dimensions() to determine these values
+   * in advance of calling jpeg_start_decompress().
+   */
+
+  JDIMENSION output_width;	/* scaled image width */
+  JDIMENSION output_height;	/* scaled image height */
+  int out_color_components;	/* # of color components in out_color_space */
+  int output_components;	/* # of color components returned */
+  /* output_components is 1 (a colormap index) when quantizing colors;
+   * otherwise it equals out_color_components.
+   */
+  int rec_outbuf_height;	/* min recommended height of scanline buffer */
+  /* If the buffer passed to jpeg_read_scanlines() is less than this many rows
+   * high, space and time will be wasted due to unnecessary data copying.
+   * Usually rec_outbuf_height will be 1 or 2, at most 4.
+   */
+
+  /* When quantizing colors, the output colormap is described by these fields.
+   * The application can supply a colormap by setting colormap non-NULL before
+   * calling jpeg_start_decompress; otherwise a colormap is created during
+   * jpeg_start_decompress or jpeg_start_output.
+   * The map has out_color_components rows and actual_number_of_colors columns.
+   */
+  int actual_number_of_colors;	/* number of entries in use */
+  JSAMPARRAY colormap;		/* The color map as a 2-D pixel array */
+
+  /* State variables: these variables indicate the progress of decompression.
+   * The application may examine these but must not modify them.
+   */
+
+  /* Row index of next scanline to be read from jpeg_read_scanlines().
+   * Application may use this to control its processing loop, e.g.,
+   * "while (output_scanline < output_height)".
+   */
+  JDIMENSION output_scanline;	/* 0 .. output_height-1  */
+
+  /* Current input scan number and number of iMCU rows completed in scan.
+   * These indicate the progress of the decompressor input side.
+   */
+  int input_scan_number;	/* Number of SOS markers seen so far */
+  JDIMENSION input_iMCU_row;	/* Number of iMCU rows completed */
+
+  /* The "output scan number" is the notional scan being displayed by the
+   * output side.  The decompressor will not allow output scan/row number
+   * to get ahead of input scan/row, but it can fall arbitrarily far behind.
+   */
+  int output_scan_number;	/* Nominal scan number being displayed */
+  JDIMENSION output_iMCU_row;	/* Number of iMCU rows read */
+
+  /* Current progression status.  coef_bits[c][i] indicates the precision
+   * with which component c's DCT coefficient i (in zigzag order) is known.
+   * It is -1 when no data has yet been received, otherwise it is the point
+   * transform (shift) value for the most recent scan of the coefficient
+   * (thus, 0 at completion of the progression).
+   * This pointer is NULL when reading a non-progressive file.
+   */
+  int (*coef_bits)[DCTSIZE2];	/* -1 or current Al value for each coef */
+
+  /* Internal JPEG parameters --- the application usually need not look at
+   * these fields.  Note that the decompressor output side may not use
+   * any parameters that can change between scans.
+   */
+
+  /* Quantization and Huffman tables are carried forward across input
+   * datastreams when processing abbreviated JPEG datastreams.
+   */
+
+  JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
+  /* ptrs to coefficient quantization tables, or NULL if not defined */
+
+  JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
+  JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
+  /* ptrs to Huffman coding tables, or NULL if not defined */
+
+  /* These parameters are never carried across datastreams, since they
+   * are given in SOF/SOS markers or defined to be reset by SOI.
+   */
+
+  int data_precision;		/* bits of precision in image data */
+
+  jpeg_component_info * comp_info;
+  /* comp_info[i] describes component that appears i'th in SOF */
+
+  boolean progressive_mode;	/* TRUE if SOFn specifies progressive mode */
+  boolean arith_code;		/* TRUE=arithmetic coding, FALSE=Huffman */
+
+  UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
+  UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
+  UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
+
+  unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */
+
+  /* These fields record data obtained from optional markers recognized by
+   * the JPEG library.
+   */
+  boolean saw_JFIF_marker;	/* TRUE iff a JFIF APP0 marker was found */
+  /* Data copied from JFIF marker; only valid if saw_JFIF_marker is TRUE: */
+  UINT8 JFIF_major_version;	/* JFIF version number */
+  UINT8 JFIF_minor_version;
+  UINT8 density_unit;		/* JFIF code for pixel size units */
+  UINT16 X_density;		/* Horizontal pixel density */
+  UINT16 Y_density;		/* Vertical pixel density */
+  boolean saw_Adobe_marker;	/* TRUE iff an Adobe APP14 marker was found */
+  UINT8 Adobe_transform;	/* Color transform code from Adobe marker */
+
+  boolean CCIR601_sampling;	/* TRUE=first samples are cosited */
+
+  /* Aside from the specific data retained from APPn markers known to the
+   * library, the uninterpreted contents of any or all APPn and COM markers
+   * can be saved in a list for examination by the application.
+   */
+  jpeg_saved_marker_ptr marker_list; /* Head of list of saved markers */
+
+  /* Remaining fields are known throughout decompressor, but generally
+   * should not be touched by a surrounding application.
+   */
+
+  /*
+   * These fields are computed during decompression startup
+   */
+  int max_h_samp_factor;	/* largest h_samp_factor */
+  int max_v_samp_factor;	/* largest v_samp_factor */
+
+  int min_DCT_scaled_size;	/* smallest DCT_scaled_size of any component */
+
+  JDIMENSION total_iMCU_rows;	/* # of iMCU rows in image */
+  /* The coefficient controller's input and output progress is measured in
+   * units of "iMCU" (interleaved MCU) rows.  These are the same as MCU rows
+   * in fully interleaved JPEG scans, but are used whether the scan is
+   * interleaved or not.  We define an iMCU row as v_samp_factor DCT block
+   * rows of each component.  Therefore, the IDCT output contains
+   * v_samp_factor*DCT_scaled_size sample rows of a component per iMCU row.
+   */
+
+  JSAMPLE * sample_range_limit; /* table for fast range-limiting */
+
+  /*
+   * These fields are valid during any one scan.
+   * They describe the components and MCUs actually appearing in the scan.
+   * Note that the decompressor output side must not use these fields.
+   */
+  int comps_in_scan;		/* # of JPEG components in this scan */
+  jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
+  /* *cur_comp_info[i] describes component that appears i'th in SOS */
+
+  JDIMENSION MCUs_per_row;	/* # of MCUs across the image */
+  JDIMENSION MCU_rows_in_scan;	/* # of MCU rows in the image */
+
+  int blocks_in_MCU;		/* # of DCT blocks per MCU */
+  int MCU_membership[D_MAX_BLOCKS_IN_MCU];
+  /* MCU_membership[i] is index in cur_comp_info of component owning */
+  /* i'th block in an MCU */
+
+  int Ss, Se, Ah, Al;		/* progressive JPEG parameters for scan */
+
+  /* This field is shared between entropy decoder and marker parser.
+   * It is either zero or the code of a JPEG marker that has been
+   * read from the data source, but has not yet been processed.
+   */
+  int unread_marker;
+
+  /*
+   * Links to decompression subobjects (methods, private variables of modules)
+   */
+  struct jpeg_decomp_master * master;
+  struct jpeg_d_main_controller * main;
+  struct jpeg_d_coef_controller * coef;
+  struct jpeg_d_post_controller * post;
+  struct jpeg_input_controller * inputctl;
+  struct jpeg_marker_reader * marker;
+  struct jpeg_entropy_decoder * entropy;
+  struct jpeg_inverse_dct * idct;
+  struct jpeg_upsampler * upsample;
+  struct jpeg_color_deconverter * cconvert;
+  struct jpeg_color_quantizer * cquantize;
+};
+
+
+/* "Object" declarations for JPEG modules that may be supplied or called
+ * directly by the surrounding application.
+ * As with all objects in the JPEG library, these structs only define the
+ * publicly visible methods and state variables of a module.  Additional
+ * private fields may exist after the public ones.
+ */
+
+
+/* Error handler object */
+
+struct jpeg_error_mgr {
+  /* Error exit handler: does not return to caller */
+  JMETHOD(void, error_exit, (j_common_ptr cinfo));
+  /* Conditionally emit a trace or warning message */
+  JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level));
+  /* Routine that actually outputs a trace or error message */
+  JMETHOD(void, output_message, (j_common_ptr cinfo));
+  /* Format a message string for the most recent JPEG error or message */
+  JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer));
+#define JMSG_LENGTH_MAX  200	/* recommended size of format_message buffer */
+  /* Reset error state variables at start of a new image */
+  JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo));
+  
+  /* The message ID code and any parameters are saved here.
+   * A message can have one string parameter or up to 8 int parameters.
+   */
+  int msg_code;
+#define JMSG_STR_PARM_MAX  80
+  union {
+    int i[8];
+    char s[JMSG_STR_PARM_MAX];
+  } msg_parm;
+  
+  /* Standard state variables for error facility */
+  
+  int trace_level;		/* max msg_level that will be displayed */
+  
+  /* For recoverable corrupt-data errors, we emit a warning message,
+   * but keep going unless emit_message chooses to abort.  emit_message
+   * should count warnings in num_warnings.  The surrounding application
+   * can check for bad data by seeing if num_warnings is nonzero at the
+   * end of processing.
+   */
+  long num_warnings;		/* number of corrupt-data warnings */
+
+  /* These fields point to the table(s) of error message strings.
+   * An application can change the table pointer to switch to a different
+   * message list (typically, to change the language in which errors are
+   * reported).  Some applications may wish to add additional error codes
+   * that will be handled by the JPEG library error mechanism; the second
+   * table pointer is used for this purpose.
+   *
+   * First table includes all errors generated by JPEG library itself.
+   * Error code 0 is reserved for a "no such error string" message.
+   */
+  const char * const * jpeg_message_table; /* Library errors */
+  int last_jpeg_message;    /* Table contains strings 0..last_jpeg_message */
+  /* Second table can be added by application (see cjpeg/djpeg for example).
+   * It contains strings numbered first_addon_message..last_addon_message.
+   */
+  const char * const * addon_message_table; /* Non-library errors */
+  int first_addon_message;	/* code for first string in addon table */
+  int last_addon_message;	/* code for last string in addon table */
+};
+
+
+/* Progress monitor object */
+
+struct jpeg_progress_mgr {
+  JMETHOD(void, progress_monitor, (j_common_ptr cinfo));
+
+  long pass_counter;		/* work units completed in this pass */
+  long pass_limit;		/* total number of work units in this pass */
+  int completed_passes;		/* passes completed so far */
+  int total_passes;		/* total number of passes expected */
+};
+
+
+/* Data destination object for compression */
+
+struct jpeg_destination_mgr {
+  JOCTET * next_output_byte;	/* => next byte to write in buffer */
+  size_t free_in_buffer;	/* # of byte spaces remaining in buffer */
+
+  JMETHOD(void, init_destination, (j_compress_ptr cinfo));
+  JMETHOD(boolean, empty_output_buffer, (j_compress_ptr cinfo));
+  JMETHOD(void, term_destination, (j_compress_ptr cinfo));
+};
+
+
+/* Data source object for decompression */
+
+struct jpeg_source_mgr {
+  const JOCTET * next_input_byte; /* => next byte to read from buffer */
+  size_t bytes_in_buffer;	/* # of bytes remaining in buffer */
+
+  JMETHOD(void, init_source, (j_decompress_ptr cinfo));
+  JMETHOD(boolean, fill_input_buffer, (j_decompress_ptr cinfo));
+  JMETHOD(void, skip_input_data, (j_decompress_ptr cinfo, long num_bytes));
+  JMETHOD(boolean, resync_to_restart, (j_decompress_ptr cinfo, int desired));
+  JMETHOD(void, term_source, (j_decompress_ptr cinfo));
+};
+
+
+/* Memory manager object.
+ * Allocates "small" objects (a few K total), "large" objects (tens of K),
+ * and "really big" objects (virtual arrays with backing store if needed).
+ * The memory manager does not allow individual objects to be freed; rather,
+ * each created object is assigned to a pool, and whole pools can be freed
+ * at once.  This is faster and more convenient than remembering exactly what
+ * to free, especially where malloc()/free() are not too speedy.
+ * NB: alloc routines never return NULL.  They exit to error_exit if not
+ * successful.
+ */
+
+#define JPOOL_PERMANENT	0	/* lasts until master record is destroyed */
+#define JPOOL_IMAGE	1	/* lasts until done with image/datastream */
+#define JPOOL_NUMPOOLS	2
+
+typedef struct jvirt_sarray_control * jvirt_sarray_ptr;
+typedef struct jvirt_barray_control * jvirt_barray_ptr;
+
+
+struct jpeg_memory_mgr {
+  /* Method pointers */
+  JMETHOD(void *, alloc_small, (j_common_ptr cinfo, int pool_id,
+				size_t sizeofobject));
+  JMETHOD(void FAR *, alloc_large, (j_common_ptr cinfo, int pool_id,
+				     size_t sizeofobject));
+  JMETHOD(JSAMPARRAY, alloc_sarray, (j_common_ptr cinfo, int pool_id,
+				     JDIMENSION samplesperrow,
+				     JDIMENSION numrows));
+  JMETHOD(JBLOCKARRAY, alloc_barray, (j_common_ptr cinfo, int pool_id,
+				      JDIMENSION blocksperrow,
+				      JDIMENSION numrows));
+  JMETHOD(jvirt_sarray_ptr, request_virt_sarray, (j_common_ptr cinfo,
+						  int pool_id,
+						  boolean pre_zero,
+						  JDIMENSION samplesperrow,
+						  JDIMENSION numrows,
+						  JDIMENSION maxaccess));
+  JMETHOD(jvirt_barray_ptr, request_virt_barray, (j_common_ptr cinfo,
+						  int pool_id,
+						  boolean pre_zero,
+						  JDIMENSION blocksperrow,
+						  JDIMENSION numrows,
+						  JDIMENSION maxaccess));
+  JMETHOD(void, realize_virt_arrays, (j_common_ptr cinfo));
+  JMETHOD(JSAMPARRAY, access_virt_sarray, (j_common_ptr cinfo,
+					   jvirt_sarray_ptr ptr,
+					   JDIMENSION start_row,
+					   JDIMENSION num_rows,
+					   boolean writable));
+  JMETHOD(JBLOCKARRAY, access_virt_barray, (j_common_ptr cinfo,
+					    jvirt_barray_ptr ptr,
+					    JDIMENSION start_row,
+					    JDIMENSION num_rows,
+					    boolean writable));
+  JMETHOD(void, free_pool, (j_common_ptr cinfo, int pool_id));
+  JMETHOD(void, self_destruct, (j_common_ptr cinfo));
+
+  /* Limit on memory allocation for this JPEG object.  (Note that this is
+   * merely advisory, not a guaranteed maximum; it only affects the space
+   * used for virtual-array buffers.)  May be changed by outer application
+   * after creating the JPEG object.
+   */
+  long max_memory_to_use;
+
+  /* Maximum allocation request accepted by alloc_large. */
+  long max_alloc_chunk;
+};
+
+
+/* Routine signature for application-supplied marker processing methods.
+ * Need not pass marker code since it is stored in cinfo->unread_marker.
+ */
+typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
+
+
+/* Declarations for routines called by application.
+ * The JPP macro hides prototype parameters from compilers that can't cope.
+ * Note JPP requires double parentheses.
+ */
+
+#ifdef HAVE_PROTOTYPES
+#define JPP(arglist)	arglist
+#else
+#define JPP(arglist)	()
+#endif
+
+
+/* Short forms of external names for systems with brain-damaged linkers.
+ * We shorten external names to be unique in the first six letters, which
+ * is good enough for all known systems.
+ * (If your compiler itself needs names to be unique in less than 15 
+ * characters, you are out of luck.  Get a better compiler.)
+ */
+
+#ifdef NEED_SHORT_EXTERNAL_NAMES
+#define jpeg_std_error		jStdError
+#define jpeg_CreateCompress	jCreaCompress
+#define jpeg_CreateDecompress	jCreaDecompress
+#define jpeg_destroy_compress	jDestCompress
+#define jpeg_destroy_decompress	jDestDecompress
+#define jpeg_stdio_dest		jStdDest
+#define jpeg_stdio_src		jStdSrc
+#define jpeg_set_defaults	jSetDefaults
+#define jpeg_set_colorspace	jSetColorspace
+#define jpeg_default_colorspace	jDefColorspace
+#define jpeg_set_quality	jSetQuality
+#define jpeg_set_linear_quality	jSetLQuality
+#define jpeg_add_quant_table	jAddQuantTable
+#define jpeg_quality_scaling	jQualityScaling
+#define jpeg_simple_progression	jSimProgress
+#define jpeg_suppress_tables	jSuppressTables
+#define jpeg_alloc_quant_table	jAlcQTable
+#define jpeg_alloc_huff_table	jAlcHTable
+#define jpeg_start_compress	jStrtCompress
+#define jpeg_write_scanlines	jWrtScanlines
+#define jpeg_finish_compress	jFinCompress
+#define jpeg_write_raw_data	jWrtRawData
+#define jpeg_write_marker	jWrtMarker
+#define jpeg_write_m_header	jWrtMHeader
+#define jpeg_write_m_byte	jWrtMByte
+#define jpeg_write_tables	jWrtTables
+#define jpeg_read_header	jReadHeader
+#define jpeg_start_decompress	jStrtDecompress
+#define jpeg_read_scanlines	jReadScanlines
+#define jpeg_finish_decompress	jFinDecompress
+#define jpeg_read_raw_data	jReadRawData
+#define jpeg_has_multiple_scans	jHasMultScn
+#define jpeg_start_output	jStrtOutput
+#define jpeg_finish_output	jFinOutput
+#define jpeg_input_complete	jInComplete
+#define jpeg_new_colormap	jNewCMap
+#define jpeg_consume_input	jConsumeInput
+#define jpeg_calc_output_dimensions	jCalcDimensions
+#define jpeg_save_markers	jSaveMarkers
+#define jpeg_set_marker_processor	jSetMarker
+#define jpeg_read_coefficients	jReadCoefs
+#define jpeg_write_coefficients	jWrtCoefs
+#define jpeg_copy_critical_parameters	jCopyCrit
+#define jpeg_abort_compress	jAbrtCompress
+#define jpeg_abort_decompress	jAbrtDecompress
+#define jpeg_abort		jAbort
+#define jpeg_destroy		jDestroy
+#define jpeg_resync_to_restart	jResyncRestart
+#endif /* NEED_SHORT_EXTERNAL_NAMES */
+
+
+/* Default error-management setup */
+EXTERN(struct jpeg_error_mgr *) jpeg_std_error
+	JPP((struct jpeg_error_mgr * err));
+
+/* Initialization of JPEG compression objects.
+ * jpeg_create_compress() and jpeg_create_decompress() are the exported
+ * names that applications should call.  These expand to calls on
+ * jpeg_CreateCompress and jpeg_CreateDecompress with additional information
+ * passed for version mismatch checking.
+ * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
+ */
+#define jpeg_create_compress(cinfo) \
+    jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
+			(size_t) sizeof(struct jpeg_compress_struct))
+#define jpeg_create_decompress(cinfo) \
+    jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
+			  (size_t) sizeof(struct jpeg_decompress_struct))
+EXTERN(void) jpeg_CreateCompress JPP((j_compress_ptr cinfo,
+				      int version, size_t structsize));
+EXTERN(void) jpeg_CreateDecompress JPP((j_decompress_ptr cinfo,
+					int version, size_t structsize));
+/* Destruction of JPEG compression objects */
+EXTERN(void) jpeg_destroy_compress JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_destroy_decompress JPP((j_decompress_ptr cinfo));
+
+/* Standard data source and destination managers: stdio streams. */
+/* Caller is responsible for opening the file before and closing after. */
+EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
+EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, FILE * infile));
+
+/* Default parameter setup for compression */
+EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
+/* Compression parameter setup aids */
+EXTERN(void) jpeg_set_colorspace JPP((j_compress_ptr cinfo,
+				      J_COLOR_SPACE colorspace));
+EXTERN(void) jpeg_default_colorspace JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_set_quality JPP((j_compress_ptr cinfo, int quality,
+				   boolean force_baseline));
+EXTERN(void) jpeg_set_linear_quality JPP((j_compress_ptr cinfo,
+					  int scale_factor,
+					  boolean force_baseline));
+EXTERN(void) jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl,
+				       const unsigned int *basic_table,
+				       int scale_factor,
+				       boolean force_baseline));
+EXTERN(int) jpeg_quality_scaling JPP((int quality));
+EXTERN(void) jpeg_simple_progression JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo,
+				       boolean suppress));
+EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
+EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
+
+/* Main entry points for compression */
+EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo,
+				      boolean write_all_tables));
+EXTERN(JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo,
+					     JSAMPARRAY scanlines,
+					     JDIMENSION num_lines));
+EXTERN(void) jpeg_finish_compress JPP((j_compress_ptr cinfo));
+
+/* Replaces jpeg_write_scanlines when writing raw downsampled data. */
+EXTERN(JDIMENSION) jpeg_write_raw_data JPP((j_compress_ptr cinfo,
+					    JSAMPIMAGE data,
+					    JDIMENSION num_lines));
+
+/* Write a special marker.  See libjpeg.doc concerning safe usage. */
+EXTERN(void) jpeg_write_marker
+	JPP((j_compress_ptr cinfo, int marker,
+	     const JOCTET * dataptr, unsigned int datalen));
+/* Same, but piecemeal. */
+EXTERN(void) jpeg_write_m_header
+	JPP((j_compress_ptr cinfo, int marker, unsigned int datalen));
+EXTERN(void) jpeg_write_m_byte
+	JPP((j_compress_ptr cinfo, int val));
+
+/* Alternate compression function: just write an abbreviated table file */
+EXTERN(void) jpeg_write_tables JPP((j_compress_ptr cinfo));
+
+/* Decompression startup: read start of JPEG datastream to see what's there */
+EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
+				  boolean require_image));
+/* Return value is one of: */
+#define JPEG_SUSPENDED		0 /* Suspended due to lack of input data */
+#define JPEG_HEADER_OK		1 /* Found valid image datastream */
+#define JPEG_HEADER_TABLES_ONLY	2 /* Found valid table-specs-only datastream */
+/* If you pass require_image = TRUE (normal case), you need not check for
+ * a TABLES_ONLY return code; an abbreviated file will cause an error exit.
+ * JPEG_SUSPENDED is only possible if you use a data source module that can
+ * give a suspension return (the stdio source module doesn't).
+ */
+
+/* Main entry points for decompression */
+EXTERN(boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo));
+EXTERN(JDIMENSION) jpeg_read_scanlines JPP((j_decompress_ptr cinfo,
+					    JSAMPARRAY scanlines,
+					    JDIMENSION max_lines));
+EXTERN(boolean) jpeg_finish_decompress JPP((j_decompress_ptr cinfo));
+
+/* Replaces jpeg_read_scanlines when reading raw downsampled data. */
+EXTERN(JDIMENSION) jpeg_read_raw_data JPP((j_decompress_ptr cinfo,
+					   JSAMPIMAGE data,
+					   JDIMENSION max_lines));
+
+/* Additional entry points for buffered-image mode. */
+EXTERN(boolean) jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo));
+EXTERN(boolean) jpeg_start_output JPP((j_decompress_ptr cinfo,
+				       int scan_number));
+EXTERN(boolean) jpeg_finish_output JPP((j_decompress_ptr cinfo));
+EXTERN(boolean) jpeg_input_complete JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_new_colormap JPP((j_decompress_ptr cinfo));
+EXTERN(int) jpeg_consume_input JPP((j_decompress_ptr cinfo));
+/* Return value is one of: */
+/* #define JPEG_SUSPENDED	0    Suspended due to lack of input data */
+#define JPEG_REACHED_SOS	1 /* Reached start of new scan */
+#define JPEG_REACHED_EOI	2 /* Reached end of image */
+#define JPEG_ROW_COMPLETED	3 /* Completed one iMCU row */
+#define JPEG_SCAN_COMPLETED	4 /* Completed last iMCU row of a scan */
+
+/* Precalculate output dimensions for current decompression parameters. */
+EXTERN(void) jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo));
+
+/* Control saving of COM and APPn markers into marker_list. */
+EXTERN(void) jpeg_save_markers
+	JPP((j_decompress_ptr cinfo, int marker_code,
+	     unsigned int length_limit));
+
+/* Install a special processing method for COM or APPn markers. */
+EXTERN(void) jpeg_set_marker_processor
+	JPP((j_decompress_ptr cinfo, int marker_code,
+	     jpeg_marker_parser_method routine));
+
+/* Read or write raw DCT coefficients --- useful for lossless transcoding. */
+EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo));
+EXTERN(void) jpeg_write_coefficients JPP((j_compress_ptr cinfo,
+					  jvirt_barray_ptr * coef_arrays));
+EXTERN(void) jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
+						j_compress_ptr dstinfo));
+
+/* If you choose to abort compression or decompression before completing
+ * jpeg_finish_(de)compress, then you need to clean up to release memory,
+ * temporary files, etc.  You can just call jpeg_destroy_(de)compress
+ * if you're done with the JPEG object, but if you want to clean it up and
+ * reuse it, call this:
+ */
+EXTERN(void) jpeg_abort_compress JPP((j_compress_ptr cinfo));
+EXTERN(void) jpeg_abort_decompress JPP((j_decompress_ptr cinfo));
+
+/* Generic versions of jpeg_abort and jpeg_destroy that work on either
+ * flavor of JPEG object.  These may be more convenient in some places.
+ */
+EXTERN(void) jpeg_abort JPP((j_common_ptr cinfo));
+EXTERN(void) jpeg_destroy JPP((j_common_ptr cinfo));
+
+/* Default restart-marker-resync procedure for use by data source modules */
+EXTERN(boolean) jpeg_resync_to_restart JPP((j_decompress_ptr cinfo,
+					    int desired));
+
+
+/* These marker codes are exported since applications and data source modules
+ * are likely to want to use them.
+ */
+
+#define JPEG_RST0	0xD0	/* RST0 marker code */
+#define JPEG_EOI	0xD9	/* EOI marker code */
+#define JPEG_APP0	0xE0	/* APP0 marker code */
+#define JPEG_COM	0xFE	/* COM marker code */
+
+
+/* If we have a brain-damaged compiler that emits warnings (or worse, errors)
+ * for structure definitions that are never filled in, keep it quiet by
+ * supplying dummy definitions for the various substructures.
+ */
+
+#ifdef INCOMPLETE_TYPES_BROKEN
+#ifndef JPEG_INTERNALS		/* will be defined in jpegint.h */
+struct jvirt_sarray_control { long dummy; };
+struct jvirt_barray_control { long dummy; };
+struct jpeg_comp_master { long dummy; };
+struct jpeg_c_main_controller { long dummy; };
+struct jpeg_c_prep_controller { long dummy; };
+struct jpeg_c_coef_controller { long dummy; };
+struct jpeg_marker_writer { long dummy; };
+struct jpeg_color_converter { long dummy; };
+struct jpeg_downsampler { long dummy; };
+struct jpeg_forward_dct { long dummy; };
+struct jpeg_entropy_encoder { long dummy; };
+struct jpeg_decomp_master { long dummy; };
+struct jpeg_d_main_controller { long dummy; };
+struct jpeg_d_coef_controller { long dummy; };
+struct jpeg_d_post_controller { long dummy; };
+struct jpeg_input_controller { long dummy; };
+struct jpeg_marker_reader { long dummy; };
+struct jpeg_entropy_decoder { long dummy; };
+struct jpeg_inverse_dct { long dummy; };
+struct jpeg_upsampler { long dummy; };
+struct jpeg_color_deconverter { long dummy; };
+struct jpeg_color_quantizer { long dummy; };
+#endif /* JPEG_INTERNALS */
+#endif /* INCOMPLETE_TYPES_BROKEN */
+
+
+/*
+ * The JPEG library modules define JPEG_INTERNALS before including this file.
+ * The internal structure declarations are read only when that is true.
+ * Applications using the library should not include jpegint.h, but may wish
+ * to include jerror.h.
+ */
+
+#ifdef JPEG_INTERNALS
+#include "jpegint.h"		/* fetch private declarations */
+#include "jerror.h"		/* fetch error codes too */
+#endif
+
+#endif /* JPEGLIB_H */
diff --git a/common/jpeg/jquant1.c b/common/jpeg/jquant1.c
new file mode 100644
index 00000000..b2f96aa1
--- /dev/null
+++ b/common/jpeg/jquant1.c
@@ -0,0 +1,856 @@
+/*
+ * jquant1.c
+ *
+ * Copyright (C) 1991-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains 1-pass color quantization (color mapping) routines.
+ * These routines provide mapping to a fixed color map using equally spaced
+ * color values.  Optional Floyd-Steinberg or ordered dithering is available.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+#ifdef QUANT_1PASS_SUPPORTED
+
+
+/*
+ * The main purpose of 1-pass quantization is to provide a fast, if not very
+ * high quality, colormapped output capability.  A 2-pass quantizer usually
+ * gives better visual quality; however, for quantized grayscale output this
+ * quantizer is perfectly adequate.  Dithering is highly recommended with this
+ * quantizer, though you can turn it off if you really want to.
+ *
+ * In 1-pass quantization the colormap must be chosen in advance of seeing the
+ * image.  We use a map consisting of all combinations of Ncolors[i] color
+ * values for the i'th component.  The Ncolors[] values are chosen so that
+ * their product, the total number of colors, is no more than that requested.
+ * (In most cases, the product will be somewhat less.)
+ *
+ * Since the colormap is orthogonal, the representative value for each color
+ * component can be determined without considering the other components;
+ * then these indexes can be combined into a colormap index by a standard
+ * N-dimensional-array-subscript calculation.  Most of the arithmetic involved
+ * can be precalculated and stored in the lookup table colorindex[].
+ * colorindex[i][j] maps pixel value j in component i to the nearest
+ * representative value (grid plane) for that component; this index is
+ * multiplied by the array stride for component i, so that the
+ * index of the colormap entry closest to a given pixel value is just
+ *    sum( colorindex[component-number][pixel-component-value] )
+ * Aside from being fast, this scheme allows for variable spacing between
+ * representative values with no additional lookup cost.
+ *
+ * If gamma correction has been applied in color conversion, it might be wise
+ * to adjust the color grid spacing so that the representative colors are
+ * equidistant in linear space.  At this writing, gamma correction is not
+ * implemented by jdcolor, so nothing is done here.
+ */
+
+
+/* Declarations for ordered dithering.
+ *
+ * We use a standard 16x16 ordered dither array.  The basic concept of ordered
+ * dithering is described in many references, for instance Dale Schumacher's
+ * chapter II.2 of Graphics Gems II (James Arvo, ed. Academic Press, 1991).
+ * In place of Schumacher's comparisons against a "threshold" value, we add a
+ * "dither" value to the input pixel and then round the result to the nearest
+ * output value.  The dither value is equivalent to (0.5 - threshold) times
+ * the distance between output values.  For ordered dithering, we assume that
+ * the output colors are equally spaced; if not, results will probably be
+ * worse, since the dither may be too much or too little at a given point.
+ *
+ * The normal calculation would be to form pixel value + dither, range-limit
+ * this to 0..MAXJSAMPLE, and then index into the colorindex table as usual.
+ * We can skip the separate range-limiting step by extending the colorindex
+ * table in both directions.
+ */
+
+#define ODITHER_SIZE  16	/* dimension of dither matrix */
+/* NB: if ODITHER_SIZE is not a power of 2, ODITHER_MASK uses will break */
+#define ODITHER_CELLS (ODITHER_SIZE*ODITHER_SIZE)	/* # cells in matrix */
+#define ODITHER_MASK  (ODITHER_SIZE-1) /* mask for wrapping around counters */
+
+typedef int ODITHER_MATRIX[ODITHER_SIZE][ODITHER_SIZE];
+typedef int (*ODITHER_MATRIX_PTR)[ODITHER_SIZE];
+
+static const UINT8 base_dither_matrix[ODITHER_SIZE][ODITHER_SIZE] = {
+  /* Bayer's order-4 dither array.  Generated by the code given in
+   * Stephen Hawley's article "Ordered Dithering" in Graphics Gems I.
+   * The values in this array must range from 0 to ODITHER_CELLS-1.
+   */
+  {   0,192, 48,240, 12,204, 60,252,  3,195, 51,243, 15,207, 63,255 },
+  { 128, 64,176,112,140, 76,188,124,131, 67,179,115,143, 79,191,127 },
+  {  32,224, 16,208, 44,236, 28,220, 35,227, 19,211, 47,239, 31,223 },
+  { 160, 96,144, 80,172,108,156, 92,163, 99,147, 83,175,111,159, 95 },
+  {   8,200, 56,248,  4,196, 52,244, 11,203, 59,251,  7,199, 55,247 },
+  { 136, 72,184,120,132, 68,180,116,139, 75,187,123,135, 71,183,119 },
+  {  40,232, 24,216, 36,228, 20,212, 43,235, 27,219, 39,231, 23,215 },
+  { 168,104,152, 88,164,100,148, 84,171,107,155, 91,167,103,151, 87 },
+  {   2,194, 50,242, 14,206, 62,254,  1,193, 49,241, 13,205, 61,253 },
+  { 130, 66,178,114,142, 78,190,126,129, 65,177,113,141, 77,189,125 },
+  {  34,226, 18,210, 46,238, 30,222, 33,225, 17,209, 45,237, 29,221 },
+  { 162, 98,146, 82,174,110,158, 94,161, 97,145, 81,173,109,157, 93 },
+  {  10,202, 58,250,  6,198, 54,246,  9,201, 57,249,  5,197, 53,245 },
+  { 138, 74,186,122,134, 70,182,118,137, 73,185,121,133, 69,181,117 },
+  {  42,234, 26,218, 38,230, 22,214, 41,233, 25,217, 37,229, 21,213 },
+  { 170,106,154, 90,166,102,150, 86,169,105,153, 89,165,101,149, 85 }
+};
+
+
+/* Declarations for Floyd-Steinberg dithering.
+ *
+ * Errors are accumulated into the array fserrors[], at a resolution of
+ * 1/16th of a pixel count.  The error at a given pixel is propagated
+ * to its not-yet-processed neighbors using the standard F-S fractions,
+ *		...	(here)	7/16
+ *		3/16	5/16	1/16
+ * We work left-to-right on even rows, right-to-left on odd rows.
+ *
+ * We can get away with a single array (holding one row's worth of errors)
+ * by using it to store the current row's errors at pixel columns not yet
+ * processed, but the next row's errors at columns already processed.  We
+ * need only a few extra variables to hold the errors immediately around the
+ * current column.  (If we are lucky, those variables are in registers, but
+ * even if not, they're probably cheaper to access than array elements are.)
+ *
+ * The fserrors[] array is indexed [component#][position].
+ * We provide (#columns + 2) entries per component; the extra entry at each
+ * end saves us from special-casing the first and last pixels.
+ *
+ * Note: on a wide image, we might not have enough room in a PC's near data
+ * segment to hold the error array; so it is allocated with alloc_large.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+typedef INT16 FSERROR;		/* 16 bits should be enough */
+typedef int LOCFSERROR;		/* use 'int' for calculation temps */
+#else
+typedef INT32 FSERROR;		/* may need more than 16 bits */
+typedef INT32 LOCFSERROR;	/* be sure calculation temps are big enough */
+#endif
+
+typedef FSERROR FAR *FSERRPTR;	/* pointer to error array (in FAR storage!) */
+
+
+/* Private subobject */
+
+#define MAX_Q_COMPS 4		/* max components I can handle */
+
+typedef struct {
+  struct jpeg_color_quantizer pub; /* public fields */
+
+  /* Initially allocated colormap is saved here */
+  JSAMPARRAY sv_colormap;	/* The color map as a 2-D pixel array */
+  int sv_actual;		/* number of entries in use */
+
+  JSAMPARRAY colorindex;	/* Precomputed mapping for speed */
+  /* colorindex[i][j] = index of color closest to pixel value j in component i,
+   * premultiplied as described above.  Since colormap indexes must fit into
+   * JSAMPLEs, the entries of this array will too.
+   */
+  boolean is_padded;		/* is the colorindex padded for odither? */
+
+  int Ncolors[MAX_Q_COMPS];	/* # of values alloced to each component */
+
+  /* Variables for ordered dithering */
+  int row_index;		/* cur row's vertical index in dither matrix */
+  ODITHER_MATRIX_PTR odither[MAX_Q_COMPS]; /* one dither array per component */
+
+  /* Variables for Floyd-Steinberg dithering */
+  FSERRPTR fserrors[MAX_Q_COMPS]; /* accumulated errors */
+  boolean on_odd_row;		/* flag to remember which row we are on */
+} my_cquantizer;
+
+typedef my_cquantizer * my_cquantize_ptr;
+
+
+/*
+ * Policy-making subroutines for create_colormap and create_colorindex.
+ * These routines determine the colormap to be used.  The rest of the module
+ * only assumes that the colormap is orthogonal.
+ *
+ *  * select_ncolors decides how to divvy up the available colors
+ *    among the components.
+ *  * output_value defines the set of representative values for a component.
+ *  * largest_input_value defines the mapping from input values to
+ *    representative values for a component.
+ * Note that the latter two routines may impose different policies for
+ * different components, though this is not currently done.
+ */
+
+
+LOCAL(int)
+select_ncolors (j_decompress_ptr cinfo, int Ncolors[])
+/* Determine allocation of desired colors to components, */
+/* and fill in Ncolors[] array to indicate choice. */
+/* Return value is total number of colors (product of Ncolors[] values). */
+{
+  int nc = cinfo->out_color_components; /* number of color components */
+  int max_colors = cinfo->desired_number_of_colors;
+  int total_colors, iroot, i, j;
+  boolean changed;
+  long temp;
+  static const int RGB_order[3] = { RGB_GREEN, RGB_RED, RGB_BLUE };
+
+  /* We can allocate at least the nc'th root of max_colors per component. */
+  /* Compute floor(nc'th root of max_colors). */
+  iroot = 1;
+  do {
+    iroot++;
+    temp = iroot;		/* set temp = iroot ** nc */
+    for (i = 1; i < nc; i++)
+      temp *= iroot;
+  } while (temp <= (long) max_colors); /* repeat till iroot exceeds root */
+  iroot--;			/* now iroot = floor(root) */
+
+  /* Must have at least 2 color values per component */
+  if (iroot < 2)
+    ERREXIT1(cinfo, JERR_QUANT_FEW_COLORS, (int) temp);
+
+  /* Initialize to iroot color values for each component */
+  total_colors = 1;
+  for (i = 0; i < nc; i++) {
+    Ncolors[i] = iroot;
+    total_colors *= iroot;
+  }
+  /* We may be able to increment the count for one or more components without
+   * exceeding max_colors, though we know not all can be incremented.
+   * Sometimes, the first component can be incremented more than once!
+   * (Example: for 16 colors, we start at 2*2*2, go to 3*2*2, then 4*2*2.)
+   * In RGB colorspace, try to increment G first, then R, then B.
+   */
+  do {
+    changed = FALSE;
+    for (i = 0; i < nc; i++) {
+      j = (cinfo->out_color_space == JCS_RGB ? RGB_order[i] : i);
+      /* calculate new total_colors if Ncolors[j] is incremented */
+      temp = total_colors / Ncolors[j];
+      temp *= Ncolors[j]+1;	/* done in long arith to avoid oflo */
+      if (temp > (long) max_colors)
+	break;			/* won't fit, done with this pass */
+      Ncolors[j]++;		/* OK, apply the increment */
+      total_colors = (int) temp;
+      changed = TRUE;
+    }
+  } while (changed);
+
+  return total_colors;
+}
+
+
+LOCAL(int)
+output_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
+/* Return j'th output value, where j will range from 0 to maxj */
+/* The output values must fall in 0..MAXJSAMPLE in increasing order */
+{
+  /* We always provide values 0 and MAXJSAMPLE for each component;
+   * any additional values are equally spaced between these limits.
+   * (Forcing the upper and lower values to the limits ensures that
+   * dithering can't produce a color outside the selected gamut.)
+   */
+  return (int) (((INT32) j * MAXJSAMPLE + maxj/2) / maxj);
+}
+
+
+LOCAL(int)
+largest_input_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
+/* Return largest input value that should map to j'th output value */
+/* Must have largest(j=0) >= 0, and largest(j=maxj) >= MAXJSAMPLE */
+{
+  /* Breakpoints are halfway between values returned by output_value */
+  return (int) (((INT32) (2*j + 1) * MAXJSAMPLE + maxj) / (2*maxj));
+}
+
+
+/*
+ * Create the colormap.
+ */
+
+LOCAL(void)
+create_colormap (j_decompress_ptr cinfo)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  JSAMPARRAY colormap;		/* Created colormap */
+  int total_colors;		/* Number of distinct output colors */
+  int i,j,k, nci, blksize, blkdist, ptr, val;
+
+  /* Select number of colors for each component */
+  total_colors = select_ncolors(cinfo, cquantize->Ncolors);
+
+  /* Report selected color counts */
+  if (cinfo->out_color_components == 3)
+    TRACEMS4(cinfo, 1, JTRC_QUANT_3_NCOLORS,
+	     total_colors, cquantize->Ncolors[0],
+	     cquantize->Ncolors[1], cquantize->Ncolors[2]);
+  else
+    TRACEMS1(cinfo, 1, JTRC_QUANT_NCOLORS, total_colors);
+
+  /* Allocate and fill in the colormap. */
+  /* The colors are ordered in the map in standard row-major order, */
+  /* i.e. rightmost (highest-indexed) color changes most rapidly. */
+
+  colormap = (*cinfo->mem->alloc_sarray)
+    ((j_common_ptr) cinfo, JPOOL_IMAGE,
+     (JDIMENSION) total_colors, (JDIMENSION) cinfo->out_color_components);
+
+  /* blksize is number of adjacent repeated entries for a component */
+  /* blkdist is distance between groups of identical entries for a component */
+  blkdist = total_colors;
+
+  for (i = 0; i < cinfo->out_color_components; i++) {
+    /* fill in colormap entries for i'th color component */
+    nci = cquantize->Ncolors[i]; /* # of distinct values for this color */
+    blksize = blkdist / nci;
+    for (j = 0; j < nci; j++) {
+      /* Compute j'th output value (out of nci) for component */
+      val = output_value(cinfo, i, j, nci-1);
+      /* Fill in all colormap entries that have this value of this component */
+      for (ptr = j * blksize; ptr < total_colors; ptr += blkdist) {
+	/* fill in blksize entries beginning at ptr */
+	for (k = 0; k < blksize; k++)
+	  colormap[i][ptr+k] = (JSAMPLE) val;
+      }
+    }
+    blkdist = blksize;		/* blksize of this color is blkdist of next */
+  }
+
+  /* Save the colormap in private storage,
+   * where it will survive color quantization mode changes.
+   */
+  cquantize->sv_colormap = colormap;
+  cquantize->sv_actual = total_colors;
+}
+
+
+/*
+ * Create the color index table.
+ */
+
+LOCAL(void)
+create_colorindex (j_decompress_ptr cinfo)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  JSAMPROW indexptr;
+  int i,j,k, nci, blksize, val, pad;
+
+  /* For ordered dither, we pad the color index tables by MAXJSAMPLE in
+   * each direction (input index values can be -MAXJSAMPLE .. 2*MAXJSAMPLE).
+   * This is not necessary in the other dithering modes.  However, we
+   * flag whether it was done in case user changes dithering mode.
+   */
+  if (cinfo->dither_mode == JDITHER_ORDERED) {
+    pad = MAXJSAMPLE*2;
+    cquantize->is_padded = TRUE;
+  } else {
+    pad = 0;
+    cquantize->is_padded = FALSE;
+  }
+
+  cquantize->colorindex = (*cinfo->mem->alloc_sarray)
+    ((j_common_ptr) cinfo, JPOOL_IMAGE,
+     (JDIMENSION) (MAXJSAMPLE+1 + pad),
+     (JDIMENSION) cinfo->out_color_components);
+
+  /* blksize is number of adjacent repeated entries for a component */
+  blksize = cquantize->sv_actual;
+
+  for (i = 0; i < cinfo->out_color_components; i++) {
+    /* fill in colorindex entries for i'th color component */
+    nci = cquantize->Ncolors[i]; /* # of distinct values for this color */
+    blksize = blksize / nci;
+
+    /* adjust colorindex pointers to provide padding at negative indexes. */
+    if (pad)
+      cquantize->colorindex[i] += MAXJSAMPLE;
+
+    /* in loop, val = index of current output value, */
+    /* and k = largest j that maps to current val */
+    indexptr = cquantize->colorindex[i];
+    val = 0;
+    k = largest_input_value(cinfo, i, 0, nci-1);
+    for (j = 0; j <= MAXJSAMPLE; j++) {
+      while (j > k)		/* advance val if past boundary */
+	k = largest_input_value(cinfo, i, ++val, nci-1);
+      /* premultiply so that no multiplication needed in main processing */
+      indexptr[j] = (JSAMPLE) (val * blksize);
+    }
+    /* Pad at both ends if necessary */
+    if (pad)
+      for (j = 1; j <= MAXJSAMPLE; j++) {
+	indexptr[-j] = indexptr[0];
+	indexptr[MAXJSAMPLE+j] = indexptr[MAXJSAMPLE];
+      }
+  }
+}
+
+
+/*
+ * Create an ordered-dither array for a component having ncolors
+ * distinct output values.
+ */
+
+LOCAL(ODITHER_MATRIX_PTR)
+make_odither_array (j_decompress_ptr cinfo, int ncolors)
+{
+  ODITHER_MATRIX_PTR odither;
+  int j,k;
+  INT32 num,den;
+
+  odither = (ODITHER_MATRIX_PTR)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(ODITHER_MATRIX));
+  /* The inter-value distance for this color is MAXJSAMPLE/(ncolors-1).
+   * Hence the dither value for the matrix cell with fill order f
+   * (f=0..N-1) should be (N-1-2*f)/(2*N) * MAXJSAMPLE/(ncolors-1).
+   * On 16-bit-int machine, be careful to avoid overflow.
+   */
+  den = 2 * ODITHER_CELLS * ((INT32) (ncolors - 1));
+  for (j = 0; j < ODITHER_SIZE; j++) {
+    for (k = 0; k < ODITHER_SIZE; k++) {
+      num = ((INT32) (ODITHER_CELLS-1 - 2*((int)base_dither_matrix[j][k])))
+	    * MAXJSAMPLE;
+      /* Ensure round towards zero despite C's lack of consistency
+       * about rounding negative values in integer division...
+       */
+      odither[j][k] = (int) (num<0 ? -((-num)/den) : num/den);
+    }
+  }
+  return odither;
+}
+
+
+/*
+ * Create the ordered-dither tables.
+ * Components having the same number of representative colors may 
+ * share a dither table.
+ */
+
+LOCAL(void)
+create_odither_tables (j_decompress_ptr cinfo)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  ODITHER_MATRIX_PTR odither;
+  int i, j, nci;
+
+  for (i = 0; i < cinfo->out_color_components; i++) {
+    nci = cquantize->Ncolors[i]; /* # of distinct values for this color */
+    odither = NULL;		/* search for matching prior component */
+    for (j = 0; j < i; j++) {
+      if (nci == cquantize->Ncolors[j]) {
+	odither = cquantize->odither[j];
+	break;
+      }
+    }
+    if (odither == NULL)	/* need a new table? */
+      odither = make_odither_array(cinfo, nci);
+    cquantize->odither[i] = odither;
+  }
+}
+
+
+/*
+ * Map some rows of pixels to the output colormapped representation.
+ */
+
+METHODDEF(void)
+color_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+		JSAMPARRAY output_buf, int num_rows)
+/* General case, no dithering */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  JSAMPARRAY colorindex = cquantize->colorindex;
+  register int pixcode, ci;
+  register JSAMPROW ptrin, ptrout;
+  int row;
+  JDIMENSION col;
+  JDIMENSION width = cinfo->output_width;
+  register int nc = cinfo->out_color_components;
+
+  for (row = 0; row < num_rows; row++) {
+    ptrin = input_buf[row];
+    ptrout = output_buf[row];
+    for (col = width; col > 0; col--) {
+      pixcode = 0;
+      for (ci = 0; ci < nc; ci++) {
+	pixcode += GETJSAMPLE(colorindex[ci][GETJSAMPLE(*ptrin++)]);
+      }
+      *ptrout++ = (JSAMPLE) pixcode;
+    }
+  }
+}
+
+
+METHODDEF(void)
+color_quantize3 (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+		 JSAMPARRAY output_buf, int num_rows)
+/* Fast path for out_color_components==3, no dithering */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  register int pixcode;
+  register JSAMPROW ptrin, ptrout;
+  JSAMPROW colorindex0 = cquantize->colorindex[0];
+  JSAMPROW colorindex1 = cquantize->colorindex[1];
+  JSAMPROW colorindex2 = cquantize->colorindex[2];
+  int row;
+  JDIMENSION col;
+  JDIMENSION width = cinfo->output_width;
+
+  for (row = 0; row < num_rows; row++) {
+    ptrin = input_buf[row];
+    ptrout = output_buf[row];
+    for (col = width; col > 0; col--) {
+      pixcode  = GETJSAMPLE(colorindex0[GETJSAMPLE(*ptrin++)]);
+      pixcode += GETJSAMPLE(colorindex1[GETJSAMPLE(*ptrin++)]);
+      pixcode += GETJSAMPLE(colorindex2[GETJSAMPLE(*ptrin++)]);
+      *ptrout++ = (JSAMPLE) pixcode;
+    }
+  }
+}
+
+
+METHODDEF(void)
+quantize_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+		     JSAMPARRAY output_buf, int num_rows)
+/* General case, with ordered dithering */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  register JSAMPROW input_ptr;
+  register JSAMPROW output_ptr;
+  JSAMPROW colorindex_ci;
+  int * dither;			/* points to active row of dither matrix */
+  int row_index, col_index;	/* current indexes into dither matrix */
+  int nc = cinfo->out_color_components;
+  int ci;
+  int row;
+  JDIMENSION col;
+  JDIMENSION width = cinfo->output_width;
+
+  for (row = 0; row < num_rows; row++) {
+    /* Initialize output values to 0 so can process components separately */
+    jzero_far((void FAR *) output_buf[row],
+	      (size_t) (width * SIZEOF(JSAMPLE)));
+    row_index = cquantize->row_index;
+    for (ci = 0; ci < nc; ci++) {
+      input_ptr = input_buf[row] + ci;
+      output_ptr = output_buf[row];
+      colorindex_ci = cquantize->colorindex[ci];
+      dither = cquantize->odither[ci][row_index];
+      col_index = 0;
+
+      for (col = width; col > 0; col--) {
+	/* Form pixel value + dither, range-limit to 0..MAXJSAMPLE,
+	 * select output value, accumulate into output code for this pixel.
+	 * Range-limiting need not be done explicitly, as we have extended
+	 * the colorindex table to produce the right answers for out-of-range
+	 * inputs.  The maximum dither is +- MAXJSAMPLE; this sets the
+	 * required amount of padding.
+	 */
+	*output_ptr += colorindex_ci[GETJSAMPLE(*input_ptr)+dither[col_index]];
+	input_ptr += nc;
+	output_ptr++;
+	col_index = (col_index + 1) & ODITHER_MASK;
+      }
+    }
+    /* Advance row index for next row */
+    row_index = (row_index + 1) & ODITHER_MASK;
+    cquantize->row_index = row_index;
+  }
+}
+
+
+METHODDEF(void)
+quantize3_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+		      JSAMPARRAY output_buf, int num_rows)
+/* Fast path for out_color_components==3, with ordered dithering */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  register int pixcode;
+  register JSAMPROW input_ptr;
+  register JSAMPROW output_ptr;
+  JSAMPROW colorindex0 = cquantize->colorindex[0];
+  JSAMPROW colorindex1 = cquantize->colorindex[1];
+  JSAMPROW colorindex2 = cquantize->colorindex[2];
+  int * dither0;		/* points to active row of dither matrix */
+  int * dither1;
+  int * dither2;
+  int row_index, col_index;	/* current indexes into dither matrix */
+  int row;
+  JDIMENSION col;
+  JDIMENSION width = cinfo->output_width;
+
+  for (row = 0; row < num_rows; row++) {
+    row_index = cquantize->row_index;
+    input_ptr = input_buf[row];
+    output_ptr = output_buf[row];
+    dither0 = cquantize->odither[0][row_index];
+    dither1 = cquantize->odither[1][row_index];
+    dither2 = cquantize->odither[2][row_index];
+    col_index = 0;
+
+    for (col = width; col > 0; col--) {
+      pixcode  = GETJSAMPLE(colorindex0[GETJSAMPLE(*input_ptr++) +
+					dither0[col_index]]);
+      pixcode += GETJSAMPLE(colorindex1[GETJSAMPLE(*input_ptr++) +
+					dither1[col_index]]);
+      pixcode += GETJSAMPLE(colorindex2[GETJSAMPLE(*input_ptr++) +
+					dither2[col_index]]);
+      *output_ptr++ = (JSAMPLE) pixcode;
+      col_index = (col_index + 1) & ODITHER_MASK;
+    }
+    row_index = (row_index + 1) & ODITHER_MASK;
+    cquantize->row_index = row_index;
+  }
+}
+
+
+METHODDEF(void)
+quantize_fs_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+		    JSAMPARRAY output_buf, int num_rows)
+/* General case, with Floyd-Steinberg dithering */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  register LOCFSERROR cur;	/* current error or pixel value */
+  LOCFSERROR belowerr;		/* error for pixel below cur */
+  LOCFSERROR bpreverr;		/* error for below/prev col */
+  LOCFSERROR bnexterr;		/* error for below/next col */
+  LOCFSERROR delta;
+  register FSERRPTR errorptr;	/* => fserrors[] at column before current */
+  register JSAMPROW input_ptr;
+  register JSAMPROW output_ptr;
+  JSAMPROW colorindex_ci;
+  JSAMPROW colormap_ci;
+  int pixcode;
+  int nc = cinfo->out_color_components;
+  int dir;			/* 1 for left-to-right, -1 for right-to-left */
+  int dirnc;			/* dir * nc */
+  int ci;
+  int row;
+  JDIMENSION col;
+  JDIMENSION width = cinfo->output_width;
+  JSAMPLE *range_limit = cinfo->sample_range_limit;
+  SHIFT_TEMPS
+
+  for (row = 0; row < num_rows; row++) {
+    /* Initialize output values to 0 so can process components separately */
+    jzero_far((void FAR *) output_buf[row],
+	      (size_t) (width * SIZEOF(JSAMPLE)));
+    for (ci = 0; ci < nc; ci++) {
+      input_ptr = input_buf[row] + ci;
+      output_ptr = output_buf[row];
+      if (cquantize->on_odd_row) {
+	/* work right to left in this row */
+	input_ptr += (width-1) * nc; /* so point to rightmost pixel */
+	output_ptr += width-1;
+	dir = -1;
+	dirnc = -nc;
+	errorptr = cquantize->fserrors[ci] + (width+1); /* => entry after last column */
+      } else {
+	/* work left to right in this row */
+	dir = 1;
+	dirnc = nc;
+	errorptr = cquantize->fserrors[ci]; /* => entry before first column */
+      }
+      colorindex_ci = cquantize->colorindex[ci];
+      colormap_ci = cquantize->sv_colormap[ci];
+      /* Preset error values: no error propagated to first pixel from left */
+      cur = 0;
+      /* and no error propagated to row below yet */
+      belowerr = bpreverr = 0;
+
+      for (col = width; col > 0; col--) {
+	/* cur holds the error propagated from the previous pixel on the
+	 * current line.  Add the error propagated from the previous line
+	 * to form the complete error correction term for this pixel, and
+	 * round the error term (which is expressed * 16) to an integer.
+	 * RIGHT_SHIFT rounds towards minus infinity, so adding 8 is correct
+	 * for either sign of the error value.
+	 * Note: errorptr points to *previous* column's array entry.
+	 */
+	cur = RIGHT_SHIFT(cur + errorptr[dir] + 8, 4);
+	/* Form pixel value + error, and range-limit to 0..MAXJSAMPLE.
+	 * The maximum error is +- MAXJSAMPLE; this sets the required size
+	 * of the range_limit array.
+	 */
+	cur += GETJSAMPLE(*input_ptr);
+	cur = GETJSAMPLE(range_limit[cur]);
+	/* Select output value, accumulate into output code for this pixel */
+	pixcode = GETJSAMPLE(colorindex_ci[cur]);
+	*output_ptr += (JSAMPLE) pixcode;
+	/* Compute actual representation error at this pixel */
+	/* Note: we can do this even though we don't have the final */
+	/* pixel code, because the colormap is orthogonal. */
+	cur -= GETJSAMPLE(colormap_ci[pixcode]);
+	/* Compute error fractions to be propagated to adjacent pixels.
+	 * Add these into the running sums, and simultaneously shift the
+	 * next-line error sums left by 1 column.
+	 */
+	bnexterr = cur;
+	delta = cur * 2;
+	cur += delta;		/* form error * 3 */
+	errorptr[0] = (FSERROR) (bpreverr + cur);
+	cur += delta;		/* form error * 5 */
+	bpreverr = belowerr + cur;
+	belowerr = bnexterr;
+	cur += delta;		/* form error * 7 */
+	/* At this point cur contains the 7/16 error value to be propagated
+	 * to the next pixel on the current line, and all the errors for the
+	 * next line have been shifted over. We are therefore ready to move on.
+	 */
+	input_ptr += dirnc;	/* advance input ptr to next column */
+	output_ptr += dir;	/* advance output ptr to next column */
+	errorptr += dir;	/* advance errorptr to current column */
+      }
+      /* Post-loop cleanup: we must unload the final error value into the
+       * final fserrors[] entry.  Note we need not unload belowerr because
+       * it is for the dummy column before or after the actual array.
+       */
+      errorptr[0] = (FSERROR) bpreverr; /* unload prev err into array */
+    }
+    cquantize->on_odd_row = (cquantize->on_odd_row ? FALSE : TRUE);
+  }
+}
+
+
+/*
+ * Allocate workspace for Floyd-Steinberg errors.
+ */
+
+LOCAL(void)
+alloc_fs_workspace (j_decompress_ptr cinfo)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  size_t arraysize;
+  int i;
+
+  arraysize = (size_t) ((cinfo->output_width + 2) * SIZEOF(FSERROR));
+  for (i = 0; i < cinfo->out_color_components; i++) {
+    cquantize->fserrors[i] = (FSERRPTR)
+      (*cinfo->mem->alloc_large)((j_common_ptr) cinfo, JPOOL_IMAGE, arraysize);
+  }
+}
+
+
+/*
+ * Initialize for one-pass color quantization.
+ */
+
+METHODDEF(void)
+start_pass_1_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  size_t arraysize;
+  int i;
+
+  /* Install my colormap. */
+  cinfo->colormap = cquantize->sv_colormap;
+  cinfo->actual_number_of_colors = cquantize->sv_actual;
+
+  /* Initialize for desired dithering mode. */
+  switch (cinfo->dither_mode) {
+  case JDITHER_NONE:
+    if (cinfo->out_color_components == 3)
+      cquantize->pub.color_quantize = color_quantize3;
+    else
+      cquantize->pub.color_quantize = color_quantize;
+    break;
+  case JDITHER_ORDERED:
+    if (cinfo->out_color_components == 3)
+      cquantize->pub.color_quantize = quantize3_ord_dither;
+    else
+      cquantize->pub.color_quantize = quantize_ord_dither;
+    cquantize->row_index = 0;	/* initialize state for ordered dither */
+    /* If user changed to ordered dither from another mode,
+     * we must recreate the color index table with padding.
+     * This will cost extra space, but probably isn't very likely.
+     */
+    if (! cquantize->is_padded)
+      create_colorindex(cinfo);
+    /* Create ordered-dither tables if we didn't already. */
+    if (cquantize->odither[0] == NULL)
+      create_odither_tables(cinfo);
+    break;
+  case JDITHER_FS:
+    cquantize->pub.color_quantize = quantize_fs_dither;
+    cquantize->on_odd_row = FALSE; /* initialize state for F-S dither */
+    /* Allocate Floyd-Steinberg workspace if didn't already. */
+    if (cquantize->fserrors[0] == NULL)
+      alloc_fs_workspace(cinfo);
+    /* Initialize the propagated errors to zero. */
+    arraysize = (size_t) ((cinfo->output_width + 2) * SIZEOF(FSERROR));
+    for (i = 0; i < cinfo->out_color_components; i++)
+      jzero_far((void FAR *) cquantize->fserrors[i], arraysize);
+    break;
+  default:
+    ERREXIT(cinfo, JERR_NOT_COMPILED);
+    break;
+  }
+}
+
+
+/*
+ * Finish up at the end of the pass.
+ */
+
+METHODDEF(void)
+finish_pass_1_quant (j_decompress_ptr cinfo)
+{
+  /* no work in 1-pass case */
+}
+
+
+/*
+ * Switch to a new external colormap between output passes.
+ * Shouldn't get to this module!
+ */
+
+METHODDEF(void)
+new_color_map_1_quant (j_decompress_ptr cinfo)
+{
+  ERREXIT(cinfo, JERR_MODE_CHANGE);
+}
+
+
+/*
+ * Module initialization routine for 1-pass color quantization.
+ */
+
+GLOBAL(void)
+jinit_1pass_quantizer (j_decompress_ptr cinfo)
+{
+  my_cquantize_ptr cquantize;
+
+  cquantize = (my_cquantize_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_cquantizer));
+  cinfo->cquantize = (struct jpeg_color_quantizer *) cquantize;
+  cquantize->pub.start_pass = start_pass_1_quant;
+  cquantize->pub.finish_pass = finish_pass_1_quant;
+  cquantize->pub.new_color_map = new_color_map_1_quant;
+  cquantize->fserrors[0] = NULL; /* Flag FS workspace not allocated */
+  cquantize->odither[0] = NULL;	/* Also flag odither arrays not allocated */
+
+  /* Make sure my internal arrays won't overflow */
+  if (cinfo->out_color_components > MAX_Q_COMPS)
+    ERREXIT1(cinfo, JERR_QUANT_COMPONENTS, MAX_Q_COMPS);
+  /* Make sure colormap indexes can be represented by JSAMPLEs */
+  if (cinfo->desired_number_of_colors > (MAXJSAMPLE+1))
+    ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXJSAMPLE+1);
+
+  /* Create the colormap and color index table. */
+  create_colormap(cinfo);
+  create_colorindex(cinfo);
+
+  /* Allocate Floyd-Steinberg workspace now if requested.
+   * We do this now since it is FAR storage and may affect the memory
+   * manager's space calculations.  If the user changes to FS dither
+   * mode in a later pass, we will allocate the space then, and will
+   * possibly overrun the max_memory_to_use setting.
+   */
+  if (cinfo->dither_mode == JDITHER_FS)
+    alloc_fs_workspace(cinfo);
+}
+
+#endif /* QUANT_1PASS_SUPPORTED */
diff --git a/common/jpeg/jquant2.c b/common/jpeg/jquant2.c
new file mode 100644
index 00000000..af601e33
--- /dev/null
+++ b/common/jpeg/jquant2.c
@@ -0,0 +1,1310 @@
+/*
+ * jquant2.c
+ *
+ * Copyright (C) 1991-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains 2-pass color quantization (color mapping) routines.
+ * These routines provide selection of a custom color map for an image,
+ * followed by mapping of the image to that color map, with optional
+ * Floyd-Steinberg dithering.
+ * It is also possible to use just the second pass to map to an arbitrary
+ * externally-given color map.
+ *
+ * Note: ordered dithering is not supported, since there isn't any fast
+ * way to compute intercolor distances; it's unclear that ordered dither's
+ * fundamental assumptions even hold with an irregularly spaced color map.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+#ifdef QUANT_2PASS_SUPPORTED
+
+
+/*
+ * This module implements the well-known Heckbert paradigm for color
+ * quantization.  Most of the ideas used here can be traced back to
+ * Heckbert's seminal paper
+ *   Heckbert, Paul.  "Color Image Quantization for Frame Buffer Display",
+ *   Proc. SIGGRAPH '82, Computer Graphics v.16 #3 (July 1982), pp 297-304.
+ *
+ * In the first pass over the image, we accumulate a histogram showing the
+ * usage count of each possible color.  To keep the histogram to a reasonable
+ * size, we reduce the precision of the input; typical practice is to retain
+ * 5 or 6 bits per color, so that 8 or 4 different input values are counted
+ * in the same histogram cell.
+ *
+ * Next, the color-selection step begins with a box representing the whole
+ * color space, and repeatedly splits the "largest" remaining box until we
+ * have as many boxes as desired colors.  Then the mean color in each
+ * remaining box becomes one of the possible output colors.
+ * 
+ * The second pass over the image maps each input pixel to the closest output
+ * color (optionally after applying a Floyd-Steinberg dithering correction).
+ * This mapping is logically trivial, but making it go fast enough requires
+ * considerable care.
+ *
+ * Heckbert-style quantizers vary a good deal in their policies for choosing
+ * the "largest" box and deciding where to cut it.  The particular policies
+ * used here have proved out well in experimental comparisons, but better ones
+ * may yet be found.
+ *
+ * In earlier versions of the IJG code, this module quantized in YCbCr color
+ * space, processing the raw upsampled data without a color conversion step.
+ * This allowed the color conversion math to be done only once per colormap
+ * entry, not once per pixel.  However, that optimization precluded other
+ * useful optimizations (such as merging color conversion with upsampling)
+ * and it also interfered with desired capabilities such as quantizing to an
+ * externally-supplied colormap.  We have therefore abandoned that approach.
+ * The present code works in the post-conversion color space, typically RGB.
+ *
+ * To improve the visual quality of the results, we actually work in scaled
+ * RGB space, giving G distances more weight than R, and R in turn more than
+ * B.  To do everything in integer math, we must use integer scale factors.
+ * The 2/3/1 scale factors used here correspond loosely to the relative
+ * weights of the colors in the NTSC grayscale equation.
+ * If you want to use this code to quantize a non-RGB color space, you'll
+ * probably need to change these scale factors.
+ */
+
+#define R_SCALE 2		/* scale R distances by this much */
+#define G_SCALE 3		/* scale G distances by this much */
+#define B_SCALE 1		/* and B by this much */
+
+/* Relabel R/G/B as components 0/1/2, respecting the RGB ordering defined
+ * in jmorecfg.h.  As the code stands, it will do the right thing for R,G,B
+ * and B,G,R orders.  If you define some other weird order in jmorecfg.h,
+ * you'll get compile errors until you extend this logic.  In that case
+ * you'll probably want to tweak the histogram sizes too.
+ */
+
+#if RGB_RED == 0
+#define C0_SCALE R_SCALE
+#endif
+#if RGB_BLUE == 0
+#define C0_SCALE B_SCALE
+#endif
+#if RGB_GREEN == 1
+#define C1_SCALE G_SCALE
+#endif
+#if RGB_RED == 2
+#define C2_SCALE R_SCALE
+#endif
+#if RGB_BLUE == 2
+#define C2_SCALE B_SCALE
+#endif
+
+
+/*
+ * First we have the histogram data structure and routines for creating it.
+ *
+ * The number of bits of precision can be adjusted by changing these symbols.
+ * We recommend keeping 6 bits for G and 5 each for R and B.
+ * If you have plenty of memory and cycles, 6 bits all around gives marginally
+ * better results; if you are short of memory, 5 bits all around will save
+ * some space but degrade the results.
+ * To maintain a fully accurate histogram, we'd need to allocate a "long"
+ * (preferably unsigned long) for each cell.  In practice this is overkill;
+ * we can get by with 16 bits per cell.  Few of the cell counts will overflow,
+ * and clamping those that do overflow to the maximum value will give close-
+ * enough results.  This reduces the recommended histogram size from 256Kb
+ * to 128Kb, which is a useful savings on PC-class machines.
+ * (In the second pass the histogram space is re-used for pixel mapping data;
+ * in that capacity, each cell must be able to store zero to the number of
+ * desired colors.  16 bits/cell is plenty for that too.)
+ * Since the JPEG code is intended to run in small memory model on 80x86
+ * machines, we can't just allocate the histogram in one chunk.  Instead
+ * of a true 3-D array, we use a row of pointers to 2-D arrays.  Each
+ * pointer corresponds to a C0 value (typically 2^5 = 32 pointers) and
+ * each 2-D array has 2^6*2^5 = 2048 or 2^6*2^6 = 4096 entries.  Note that
+ * on 80x86 machines, the pointer row is in near memory but the actual
+ * arrays are in far memory (same arrangement as we use for image arrays).
+ */
+
+#define MAXNUMCOLORS  (MAXJSAMPLE+1) /* maximum size of colormap */
+
+/* These will do the right thing for either R,G,B or B,G,R color order,
+ * but you may not like the results for other color orders.
+ */
+#define HIST_C0_BITS  5		/* bits of precision in R/B histogram */
+#define HIST_C1_BITS  6		/* bits of precision in G histogram */
+#define HIST_C2_BITS  5		/* bits of precision in B/R histogram */
+
+/* Number of elements along histogram axes. */
+#define HIST_C0_ELEMS  (1<<HIST_C0_BITS)
+#define HIST_C1_ELEMS  (1<<HIST_C1_BITS)
+#define HIST_C2_ELEMS  (1<<HIST_C2_BITS)
+
+/* These are the amounts to shift an input value to get a histogram index. */
+#define C0_SHIFT  (BITS_IN_JSAMPLE-HIST_C0_BITS)
+#define C1_SHIFT  (BITS_IN_JSAMPLE-HIST_C1_BITS)
+#define C2_SHIFT  (BITS_IN_JSAMPLE-HIST_C2_BITS)
+
+
+typedef UINT16 histcell;	/* histogram cell; prefer an unsigned type */
+
+typedef histcell FAR * histptr;	/* for pointers to histogram cells */
+
+typedef histcell hist1d[HIST_C2_ELEMS]; /* typedefs for the array */
+typedef hist1d FAR * hist2d;	/* type for the 2nd-level pointers */
+typedef hist2d * hist3d;	/* type for top-level pointer */
+
+
+/* Declarations for Floyd-Steinberg dithering.
+ *
+ * Errors are accumulated into the array fserrors[], at a resolution of
+ * 1/16th of a pixel count.  The error at a given pixel is propagated
+ * to its not-yet-processed neighbors using the standard F-S fractions,
+ *		...	(here)	7/16
+ *		3/16	5/16	1/16
+ * We work left-to-right on even rows, right-to-left on odd rows.
+ *
+ * We can get away with a single array (holding one row's worth of errors)
+ * by using it to store the current row's errors at pixel columns not yet
+ * processed, but the next row's errors at columns already processed.  We
+ * need only a few extra variables to hold the errors immediately around the
+ * current column.  (If we are lucky, those variables are in registers, but
+ * even if not, they're probably cheaper to access than array elements are.)
+ *
+ * The fserrors[] array has (#columns + 2) entries; the extra entry at
+ * each end saves us from special-casing the first and last pixels.
+ * Each entry is three values long, one value for each color component.
+ *
+ * Note: on a wide image, we might not have enough room in a PC's near data
+ * segment to hold the error array; so it is allocated with alloc_large.
+ */
+
+#if BITS_IN_JSAMPLE == 8
+typedef INT16 FSERROR;		/* 16 bits should be enough */
+typedef int LOCFSERROR;		/* use 'int' for calculation temps */
+#else
+typedef INT32 FSERROR;		/* may need more than 16 bits */
+typedef INT32 LOCFSERROR;	/* be sure calculation temps are big enough */
+#endif
+
+typedef FSERROR FAR *FSERRPTR;	/* pointer to error array (in FAR storage!) */
+
+
+/* Private subobject */
+
+typedef struct {
+  struct jpeg_color_quantizer pub; /* public fields */
+
+  /* Space for the eventually created colormap is stashed here */
+  JSAMPARRAY sv_colormap;	/* colormap allocated at init time */
+  int desired;			/* desired # of colors = size of colormap */
+
+  /* Variables for accumulating image statistics */
+  hist3d histogram;		/* pointer to the histogram */
+
+  boolean needs_zeroed;		/* TRUE if next pass must zero histogram */
+
+  /* Variables for Floyd-Steinberg dithering */
+  FSERRPTR fserrors;		/* accumulated errors */
+  boolean on_odd_row;		/* flag to remember which row we are on */
+  int * error_limiter;		/* table for clamping the applied error */
+} my_cquantizer;
+
+typedef my_cquantizer * my_cquantize_ptr;
+
+
+/*
+ * Prescan some rows of pixels.
+ * In this module the prescan simply updates the histogram, which has been
+ * initialized to zeroes by start_pass.
+ * An output_buf parameter is required by the method signature, but no data
+ * is actually output (in fact the buffer controller is probably passing a
+ * NULL pointer).
+ */
+
+METHODDEF(void)
+prescan_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
+		  JSAMPARRAY output_buf, int num_rows)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  register JSAMPROW ptr;
+  register histptr histp;
+  register hist3d histogram = cquantize->histogram;
+  int row;
+  JDIMENSION col;
+  JDIMENSION width = cinfo->output_width;
+
+  for (row = 0; row < num_rows; row++) {
+    ptr = input_buf[row];
+    for (col = width; col > 0; col--) {
+      /* get pixel value and index into the histogram */
+      histp = & histogram[GETJSAMPLE(ptr[0]) >> C0_SHIFT]
+			 [GETJSAMPLE(ptr[1]) >> C1_SHIFT]
+			 [GETJSAMPLE(ptr[2]) >> C2_SHIFT];
+      /* increment, check for overflow and undo increment if so. */
+      if (++(*histp) <= 0)
+	(*histp)--;
+      ptr += 3;
+    }
+  }
+}
+
+
+/*
+ * Next we have the really interesting routines: selection of a colormap
+ * given the completed histogram.
+ * These routines work with a list of "boxes", each representing a rectangular
+ * subset of the input color space (to histogram precision).
+ */
+
+typedef struct {
+  /* The bounds of the box (inclusive); expressed as histogram indexes */
+  int c0min, c0max;
+  int c1min, c1max;
+  int c2min, c2max;
+  /* The volume (actually 2-norm) of the box */
+  INT32 volume;
+  /* The number of nonzero histogram cells within this box */
+  long colorcount;
+} box;
+
+typedef box * boxptr;
+
+
+LOCAL(boxptr)
+find_biggest_color_pop (boxptr boxlist, int numboxes)
+/* Find the splittable box with the largest color population */
+/* Returns NULL if no splittable boxes remain */
+{
+  register boxptr boxp;
+  register int i;
+  register long maxc = 0;
+  boxptr which = NULL;
+  
+  for (i = 0, boxp = boxlist; i < numboxes; i++, boxp++) {
+    if (boxp->colorcount > maxc && boxp->volume > 0) {
+      which = boxp;
+      maxc = boxp->colorcount;
+    }
+  }
+  return which;
+}
+
+
+LOCAL(boxptr)
+find_biggest_volume (boxptr boxlist, int numboxes)
+/* Find the splittable box with the largest (scaled) volume */
+/* Returns NULL if no splittable boxes remain */
+{
+  register boxptr boxp;
+  register int i;
+  register INT32 maxv = 0;
+  boxptr which = NULL;
+  
+  for (i = 0, boxp = boxlist; i < numboxes; i++, boxp++) {
+    if (boxp->volume > maxv) {
+      which = boxp;
+      maxv = boxp->volume;
+    }
+  }
+  return which;
+}
+
+
+LOCAL(void)
+update_box (j_decompress_ptr cinfo, boxptr boxp)
+/* Shrink the min/max bounds of a box to enclose only nonzero elements, */
+/* and recompute its volume and population */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  hist3d histogram = cquantize->histogram;
+  histptr histp;
+  int c0,c1,c2;
+  int c0min,c0max,c1min,c1max,c2min,c2max;
+  INT32 dist0,dist1,dist2;
+  long ccount;
+  
+  c0min = boxp->c0min;  c0max = boxp->c0max;
+  c1min = boxp->c1min;  c1max = boxp->c1max;
+  c2min = boxp->c2min;  c2max = boxp->c2max;
+  
+  if (c0max > c0min)
+    for (c0 = c0min; c0 <= c0max; c0++)
+      for (c1 = c1min; c1 <= c1max; c1++) {
+	histp = & histogram[c0][c1][c2min];
+	for (c2 = c2min; c2 <= c2max; c2++)
+	  if (*histp++ != 0) {
+	    boxp->c0min = c0min = c0;
+	    goto have_c0min;
+	  }
+      }
+ have_c0min:
+  if (c0max > c0min)
+    for (c0 = c0max; c0 >= c0min; c0--)
+      for (c1 = c1min; c1 <= c1max; c1++) {
+	histp = & histogram[c0][c1][c2min];
+	for (c2 = c2min; c2 <= c2max; c2++)
+	  if (*histp++ != 0) {
+	    boxp->c0max = c0max = c0;
+	    goto have_c0max;
+	  }
+      }
+ have_c0max:
+  if (c1max > c1min)
+    for (c1 = c1min; c1 <= c1max; c1++)
+      for (c0 = c0min; c0 <= c0max; c0++) {
+	histp = & histogram[c0][c1][c2min];
+	for (c2 = c2min; c2 <= c2max; c2++)
+	  if (*histp++ != 0) {
+	    boxp->c1min = c1min = c1;
+	    goto have_c1min;
+	  }
+      }
+ have_c1min:
+  if (c1max > c1min)
+    for (c1 = c1max; c1 >= c1min; c1--)
+      for (c0 = c0min; c0 <= c0max; c0++) {
+	histp = & histogram[c0][c1][c2min];
+	for (c2 = c2min; c2 <= c2max; c2++)
+	  if (*histp++ != 0) {
+	    boxp->c1max = c1max = c1;
+	    goto have_c1max;
+	  }
+      }
+ have_c1max:
+  if (c2max > c2min)
+    for (c2 = c2min; c2 <= c2max; c2++)
+      for (c0 = c0min; c0 <= c0max; c0++) {
+	histp = & histogram[c0][c1min][c2];
+	for (c1 = c1min; c1 <= c1max; c1++, histp += HIST_C2_ELEMS)
+	  if (*histp != 0) {
+	    boxp->c2min = c2min = c2;
+	    goto have_c2min;
+	  }
+      }
+ have_c2min:
+  if (c2max > c2min)
+    for (c2 = c2max; c2 >= c2min; c2--)
+      for (c0 = c0min; c0 <= c0max; c0++) {
+	histp = & histogram[c0][c1min][c2];
+	for (c1 = c1min; c1 <= c1max; c1++, histp += HIST_C2_ELEMS)
+	  if (*histp != 0) {
+	    boxp->c2max = c2max = c2;
+	    goto have_c2max;
+	  }
+      }
+ have_c2max:
+
+  /* Update box volume.
+   * We use 2-norm rather than real volume here; this biases the method
+   * against making long narrow boxes, and it has the side benefit that
+   * a box is splittable iff norm > 0.
+   * Since the differences are expressed in histogram-cell units,
+   * we have to shift back to JSAMPLE units to get consistent distances;
+   * after which, we scale according to the selected distance scale factors.
+   */
+  dist0 = ((c0max - c0min) << C0_SHIFT) * C0_SCALE;
+  dist1 = ((c1max - c1min) << C1_SHIFT) * C1_SCALE;
+  dist2 = ((c2max - c2min) << C2_SHIFT) * C2_SCALE;
+  boxp->volume = dist0*dist0 + dist1*dist1 + dist2*dist2;
+  
+  /* Now scan remaining volume of box and compute population */
+  ccount = 0;
+  for (c0 = c0min; c0 <= c0max; c0++)
+    for (c1 = c1min; c1 <= c1max; c1++) {
+      histp = & histogram[c0][c1][c2min];
+      for (c2 = c2min; c2 <= c2max; c2++, histp++)
+	if (*histp != 0) {
+	  ccount++;
+	}
+    }
+  boxp->colorcount = ccount;
+}
+
+
+LOCAL(int)
+median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
+	    int desired_colors)
+/* Repeatedly select and split the largest box until we have enough boxes */
+{
+  int n,lb;
+  int c0,c1,c2,cmax;
+  register boxptr b1,b2;
+
+  while (numboxes < desired_colors) {
+    /* Select box to split.
+     * Current algorithm: by population for first half, then by volume.
+     */
+    if (numboxes*2 <= desired_colors) {
+      b1 = find_biggest_color_pop(boxlist, numboxes);
+    } else {
+      b1 = find_biggest_volume(boxlist, numboxes);
+    }
+    if (b1 == NULL)		/* no splittable boxes left! */
+      break;
+    b2 = &boxlist[numboxes];	/* where new box will go */
+    /* Copy the color bounds to the new box. */
+    b2->c0max = b1->c0max; b2->c1max = b1->c1max; b2->c2max = b1->c2max;
+    b2->c0min = b1->c0min; b2->c1min = b1->c1min; b2->c2min = b1->c2min;
+    /* Choose which axis to split the box on.
+     * Current algorithm: longest scaled axis.
+     * See notes in update_box about scaling distances.
+     */
+    c0 = ((b1->c0max - b1->c0min) << C0_SHIFT) * C0_SCALE;
+    c1 = ((b1->c1max - b1->c1min) << C1_SHIFT) * C1_SCALE;
+    c2 = ((b1->c2max - b1->c2min) << C2_SHIFT) * C2_SCALE;
+    /* We want to break any ties in favor of green, then red, blue last.
+     * This code does the right thing for R,G,B or B,G,R color orders only.
+     */
+#if RGB_RED == 0
+    cmax = c1; n = 1;
+    if (c0 > cmax) { cmax = c0; n = 0; }
+    if (c2 > cmax) { n = 2; }
+#else
+    cmax = c1; n = 1;
+    if (c2 > cmax) { cmax = c2; n = 2; }
+    if (c0 > cmax) { n = 0; }
+#endif
+    /* Choose split point along selected axis, and update box bounds.
+     * Current algorithm: split at halfway point.
+     * (Since the box has been shrunk to minimum volume,
+     * any split will produce two nonempty subboxes.)
+     * Note that lb value is max for lower box, so must be < old max.
+     */
+    switch (n) {
+    case 0:
+      lb = (b1->c0max + b1->c0min) / 2;
+      b1->c0max = lb;
+      b2->c0min = lb+1;
+      break;
+    case 1:
+      lb = (b1->c1max + b1->c1min) / 2;
+      b1->c1max = lb;
+      b2->c1min = lb+1;
+      break;
+    case 2:
+      lb = (b1->c2max + b1->c2min) / 2;
+      b1->c2max = lb;
+      b2->c2min = lb+1;
+      break;
+    }
+    /* Update stats for boxes */
+    update_box(cinfo, b1);
+    update_box(cinfo, b2);
+    numboxes++;
+  }
+  return numboxes;
+}
+
+
+LOCAL(void)
+compute_color (j_decompress_ptr cinfo, boxptr boxp, int icolor)
+/* Compute representative color for a box, put it in colormap[icolor] */
+{
+  /* Current algorithm: mean weighted by pixels (not colors) */
+  /* Note it is important to get the rounding correct! */
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  hist3d histogram = cquantize->histogram;
+  histptr histp;
+  int c0,c1,c2;
+  int c0min,c0max,c1min,c1max,c2min,c2max;
+  long count;
+  long total = 0;
+  long c0total = 0;
+  long c1total = 0;
+  long c2total = 0;
+  
+  c0min = boxp->c0min;  c0max = boxp->c0max;
+  c1min = boxp->c1min;  c1max = boxp->c1max;
+  c2min = boxp->c2min;  c2max = boxp->c2max;
+  
+  for (c0 = c0min; c0 <= c0max; c0++)
+    for (c1 = c1min; c1 <= c1max; c1++) {
+      histp = & histogram[c0][c1][c2min];
+      for (c2 = c2min; c2 <= c2max; c2++) {
+	if ((count = *histp++) != 0) {
+	  total += count;
+	  c0total += ((c0 << C0_SHIFT) + ((1<<C0_SHIFT)>>1)) * count;
+	  c1total += ((c1 << C1_SHIFT) + ((1<<C1_SHIFT)>>1)) * count;
+	  c2total += ((c2 << C2_SHIFT) + ((1<<C2_SHIFT)>>1)) * count;
+	}
+      }
+    }
+  
+  cinfo->colormap[0][icolor] = (JSAMPLE) ((c0total + (total>>1)) / total);
+  cinfo->colormap[1][icolor] = (JSAMPLE) ((c1total + (total>>1)) / total);
+  cinfo->colormap[2][icolor] = (JSAMPLE) ((c2total + (total>>1)) / total);
+}
+
+
+LOCAL(void)
+select_colors (j_decompress_ptr cinfo, int desired_colors)
+/* Master routine for color selection */
+{
+  boxptr boxlist;
+  int numboxes;
+  int i;
+
+  /* Allocate workspace for box list */
+  boxlist = (boxptr) (*cinfo->mem->alloc_small)
+    ((j_common_ptr) cinfo, JPOOL_IMAGE, desired_colors * SIZEOF(box));
+  /* Initialize one box containing whole space */
+  numboxes = 1;
+  boxlist[0].c0min = 0;
+  boxlist[0].c0max = MAXJSAMPLE >> C0_SHIFT;
+  boxlist[0].c1min = 0;
+  boxlist[0].c1max = MAXJSAMPLE >> C1_SHIFT;
+  boxlist[0].c2min = 0;
+  boxlist[0].c2max = MAXJSAMPLE >> C2_SHIFT;
+  /* Shrink it to actually-used volume and set its statistics */
+  update_box(cinfo, & boxlist[0]);
+  /* Perform median-cut to produce final box list */
+  numboxes = median_cut(cinfo, boxlist, numboxes, desired_colors);
+  /* Compute the representative color for each box, fill colormap */
+  for (i = 0; i < numboxes; i++)
+    compute_color(cinfo, & boxlist[i], i);
+  cinfo->actual_number_of_colors = numboxes;
+  TRACEMS1(cinfo, 1, JTRC_QUANT_SELECTED, numboxes);
+}
+
+
+/*
+ * These routines are concerned with the time-critical task of mapping input
+ * colors to the nearest color in the selected colormap.
+ *
+ * We re-use the histogram space as an "inverse color map", essentially a
+ * cache for the results of nearest-color searches.  All colors within a
+ * histogram cell will be mapped to the same colormap entry, namely the one
+ * closest to the cell's center.  This may not be quite the closest entry to
+ * the actual input color, but it's almost as good.  A zero in the cache
+ * indicates we haven't found the nearest color for that cell yet; the array
+ * is cleared to zeroes before starting the mapping pass.  When we find the
+ * nearest color for a cell, its colormap index plus one is recorded in the
+ * cache for future use.  The pass2 scanning routines call fill_inverse_cmap
+ * when they need to use an unfilled entry in the cache.
+ *
+ * Our method of efficiently finding nearest colors is based on the "locally
+ * sorted search" idea described by Heckbert and on the incremental distance
+ * calculation described by Spencer W. Thomas in chapter III.1 of Graphics
+ * Gems II (James Arvo, ed.  Academic Press, 1991).  Thomas points out that
+ * the distances from a given colormap entry to each cell of the histogram can
+ * be computed quickly using an incremental method: the differences between
+ * distances to adjacent cells themselves differ by a constant.  This allows a
+ * fairly fast implementation of the "brute force" approach of computing the
+ * distance from every colormap entry to every histogram cell.  Unfortunately,
+ * it needs a work array to hold the best-distance-so-far for each histogram
+ * cell (because the inner loop has to be over cells, not colormap entries).
+ * The work array elements have to be INT32s, so the work array would need
+ * 256Kb at our recommended precision.  This is not feasible in DOS machines.
+ *
+ * To get around these problems, we apply Thomas' method to compute the
+ * nearest colors for only the cells within a small subbox of the histogram.
+ * The work array need be only as big as the subbox, so the memory usage
+ * problem is solved.  Furthermore, we need not fill subboxes that are never
+ * referenced in pass2; many images use only part of the color gamut, so a
+ * fair amount of work is saved.  An additional advantage of this
+ * approach is that we can apply Heckbert's locality criterion to quickly
+ * eliminate colormap entries that are far away from the subbox; typically
+ * three-fourths of the colormap entries are rejected by Heckbert's criterion,
+ * and we need not compute their distances to individual cells in the subbox.
+ * The speed of this approach is heavily influenced by the subbox size: too
+ * small means too much overhead, too big loses because Heckbert's criterion
+ * can't eliminate as many colormap entries.  Empirically the best subbox
+ * size seems to be about 1/512th of the histogram (1/8th in each direction).
+ *
+ * Thomas' article also describes a refined method which is asymptotically
+ * faster than the brute-force method, but it is also far more complex and
+ * cannot efficiently be applied to small subboxes.  It is therefore not
+ * useful for programs intended to be portable to DOS machines.  On machines
+ * with plenty of memory, filling the whole histogram in one shot with Thomas'
+ * refined method might be faster than the present code --- but then again,
+ * it might not be any faster, and it's certainly more complicated.
+ */
+
+
+/* log2(histogram cells in update box) for each axis; this can be adjusted */
+#define BOX_C0_LOG  (HIST_C0_BITS-3)
+#define BOX_C1_LOG  (HIST_C1_BITS-3)
+#define BOX_C2_LOG  (HIST_C2_BITS-3)
+
+#define BOX_C0_ELEMS  (1<<BOX_C0_LOG) /* # of hist cells in update box */
+#define BOX_C1_ELEMS  (1<<BOX_C1_LOG)
+#define BOX_C2_ELEMS  (1<<BOX_C2_LOG)
+
+#define BOX_C0_SHIFT  (C0_SHIFT + BOX_C0_LOG)
+#define BOX_C1_SHIFT  (C1_SHIFT + BOX_C1_LOG)
+#define BOX_C2_SHIFT  (C2_SHIFT + BOX_C2_LOG)
+
+
+/*
+ * The next three routines implement inverse colormap filling.  They could
+ * all be folded into one big routine, but splitting them up this way saves
+ * some stack space (the mindist[] and bestdist[] arrays need not coexist)
+ * and may allow some compilers to produce better code by registerizing more
+ * inner-loop variables.
+ */
+
+LOCAL(int)
+find_nearby_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
+		    JSAMPLE colorlist[])
+/* Locate the colormap entries close enough to an update box to be candidates
+ * for the nearest entry to some cell(s) in the update box.  The update box
+ * is specified by the center coordinates of its first cell.  The number of
+ * candidate colormap entries is returned, and their colormap indexes are
+ * placed in colorlist[].
+ * This routine uses Heckbert's "locally sorted search" criterion to select
+ * the colors that need further consideration.
+ */
+{
+  int numcolors = cinfo->actual_number_of_colors;
+  int maxc0, maxc1, maxc2;
+  int centerc0, centerc1, centerc2;
+  int i, x, ncolors;
+  INT32 minmaxdist, min_dist, max_dist, tdist;
+  INT32 mindist[MAXNUMCOLORS];	/* min distance to colormap entry i */
+
+  /* Compute true coordinates of update box's upper corner and center.
+   * Actually we compute the coordinates of the center of the upper-corner
+   * histogram cell, which are the upper bounds of the volume we care about.
+   * Note that since ">>" rounds down, the "center" values may be closer to
+   * min than to max; hence comparisons to them must be "<=", not "<".
+   */
+  maxc0 = minc0 + ((1 << BOX_C0_SHIFT) - (1 << C0_SHIFT));
+  centerc0 = (minc0 + maxc0) >> 1;
+  maxc1 = minc1 + ((1 << BOX_C1_SHIFT) - (1 << C1_SHIFT));
+  centerc1 = (minc1 + maxc1) >> 1;
+  maxc2 = minc2 + ((1 << BOX_C2_SHIFT) - (1 << C2_SHIFT));
+  centerc2 = (minc2 + maxc2) >> 1;
+
+  /* For each color in colormap, find:
+   *  1. its minimum squared-distance to any point in the update box
+   *     (zero if color is within update box);
+   *  2. its maximum squared-distance to any point in the update box.
+   * Both of these can be found by considering only the corners of the box.
+   * We save the minimum distance for each color in mindist[];
+   * only the smallest maximum distance is of interest.
+   */
+  minmaxdist = 0x7FFFFFFFL;
+
+  for (i = 0; i < numcolors; i++) {
+    /* We compute the squared-c0-distance term, then add in the other two. */
+    x = GETJSAMPLE(cinfo->colormap[0][i]);
+    if (x < minc0) {
+      tdist = (x - minc0) * C0_SCALE;
+      min_dist = tdist*tdist;
+      tdist = (x - maxc0) * C0_SCALE;
+      max_dist = tdist*tdist;
+    } else if (x > maxc0) {
+      tdist = (x - maxc0) * C0_SCALE;
+      min_dist = tdist*tdist;
+      tdist = (x - minc0) * C0_SCALE;
+      max_dist = tdist*tdist;
+    } else {
+      /* within cell range so no contribution to min_dist */
+      min_dist = 0;
+      if (x <= centerc0) {
+	tdist = (x - maxc0) * C0_SCALE;
+	max_dist = tdist*tdist;
+      } else {
+	tdist = (x - minc0) * C0_SCALE;
+	max_dist = tdist*tdist;
+      }
+    }
+
+    x = GETJSAMPLE(cinfo->colormap[1][i]);
+    if (x < minc1) {
+      tdist = (x - minc1) * C1_SCALE;
+      min_dist += tdist*tdist;
+      tdist = (x - maxc1) * C1_SCALE;
+      max_dist += tdist*tdist;
+    } else if (x > maxc1) {
+      tdist = (x - maxc1) * C1_SCALE;
+      min_dist += tdist*tdist;
+      tdist = (x - minc1) * C1_SCALE;
+      max_dist += tdist*tdist;
+    } else {
+      /* within cell range so no contribution to min_dist */
+      if (x <= centerc1) {
+	tdist = (x - maxc1) * C1_SCALE;
+	max_dist += tdist*tdist;
+      } else {
+	tdist = (x - minc1) * C1_SCALE;
+	max_dist += tdist*tdist;
+      }
+    }
+
+    x = GETJSAMPLE(cinfo->colormap[2][i]);
+    if (x < minc2) {
+      tdist = (x - minc2) * C2_SCALE;
+      min_dist += tdist*tdist;
+      tdist = (x - maxc2) * C2_SCALE;
+      max_dist += tdist*tdist;
+    } else if (x > maxc2) {
+      tdist = (x - maxc2) * C2_SCALE;
+      min_dist += tdist*tdist;
+      tdist = (x - minc2) * C2_SCALE;
+      max_dist += tdist*tdist;
+    } else {
+      /* within cell range so no contribution to min_dist */
+      if (x <= centerc2) {
+	tdist = (x - maxc2) * C2_SCALE;
+	max_dist += tdist*tdist;
+      } else {
+	tdist = (x - minc2) * C2_SCALE;
+	max_dist += tdist*tdist;
+      }
+    }
+
+    mindist[i] = min_dist;	/* save away the results */
+    if (max_dist < minmaxdist)
+      minmaxdist = max_dist;
+  }
+
+  /* Now we know that no cell in the update box is more than minmaxdist
+   * away from some colormap entry.  Therefore, only colors that are
+   * within minmaxdist of some part of the box need be considered.
+   */
+  ncolors = 0;
+  for (i = 0; i < numcolors; i++) {
+    if (mindist[i] <= minmaxdist)
+      colorlist[ncolors++] = (JSAMPLE) i;
+  }
+  return ncolors;
+}
+
+
+LOCAL(void)
+find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
+		  int numcolors, JSAMPLE colorlist[], JSAMPLE bestcolor[])
+/* Find the closest colormap entry for each cell in the update box,
+ * given the list of candidate colors prepared by find_nearby_colors.
+ * Return the indexes of the closest entries in the bestcolor[] array.
+ * This routine uses Thomas' incremental distance calculation method to
+ * find the distance from a colormap entry to successive cells in the box.
+ */
+{
+  int ic0, ic1, ic2;
+  int i, icolor;
+  register INT32 * bptr;	/* pointer into bestdist[] array */
+  JSAMPLE * cptr;		/* pointer into bestcolor[] array */
+  INT32 dist0, dist1;		/* initial distance values */
+  register INT32 dist2;		/* current distance in inner loop */
+  INT32 xx0, xx1;		/* distance increments */
+  register INT32 xx2;
+  INT32 inc0, inc1, inc2;	/* initial values for increments */
+  /* This array holds the distance to the nearest-so-far color for each cell */
+  INT32 bestdist[BOX_C0_ELEMS * BOX_C1_ELEMS * BOX_C2_ELEMS];
+
+  /* Initialize best-distance for each cell of the update box */
+  bptr = bestdist;
+  for (i = BOX_C0_ELEMS*BOX_C1_ELEMS*BOX_C2_ELEMS-1; i >= 0; i--)
+    *bptr++ = 0x7FFFFFFFL;
+  
+  /* For each color selected by find_nearby_colors,
+   * compute its distance to the center of each cell in the box.
+   * If that's less than best-so-far, update best distance and color number.
+   */
+  
+  /* Nominal steps between cell centers ("x" in Thomas article) */
+#define STEP_C0  ((1 << C0_SHIFT) * C0_SCALE)
+#define STEP_C1  ((1 << C1_SHIFT) * C1_SCALE)
+#define STEP_C2  ((1 << C2_SHIFT) * C2_SCALE)
+  
+  for (i = 0; i < numcolors; i++) {
+    icolor = GETJSAMPLE(colorlist[i]);
+    /* Compute (square of) distance from minc0/c1/c2 to this color */
+    inc0 = (minc0 - GETJSAMPLE(cinfo->colormap[0][icolor])) * C0_SCALE;
+    dist0 = inc0*inc0;
+    inc1 = (minc1 - GETJSAMPLE(cinfo->colormap[1][icolor])) * C1_SCALE;
+    dist0 += inc1*inc1;
+    inc2 = (minc2 - GETJSAMPLE(cinfo->colormap[2][icolor])) * C2_SCALE;
+    dist0 += inc2*inc2;
+    /* Form the initial difference increments */
+    inc0 = inc0 * (2 * STEP_C0) + STEP_C0 * STEP_C0;
+    inc1 = inc1 * (2 * STEP_C1) + STEP_C1 * STEP_C1;
+    inc2 = inc2 * (2 * STEP_C2) + STEP_C2 * STEP_C2;
+    /* Now loop over all cells in box, updating distance per Thomas method */
+    bptr = bestdist;
+    cptr = bestcolor;
+    xx0 = inc0;
+    for (ic0 = BOX_C0_ELEMS-1; ic0 >= 0; ic0--) {
+      dist1 = dist0;
+      xx1 = inc1;
+      for (ic1 = BOX_C1_ELEMS-1; ic1 >= 0; ic1--) {
+	dist2 = dist1;
+	xx2 = inc2;
+	for (ic2 = BOX_C2_ELEMS-1; ic2 >= 0; ic2--) {
+	  if (dist2 < *bptr) {
+	    *bptr = dist2;
+	    *cptr = (JSAMPLE) icolor;
+	  }
+	  dist2 += xx2;
+	  xx2 += 2 * STEP_C2 * STEP_C2;
+	  bptr++;
+	  cptr++;
+	}
+	dist1 += xx1;
+	xx1 += 2 * STEP_C1 * STEP_C1;
+      }
+      dist0 += xx0;
+      xx0 += 2 * STEP_C0 * STEP_C0;
+    }
+  }
+}
+
+
+LOCAL(void)
+fill_inverse_cmap (j_decompress_ptr cinfo, int c0, int c1, int c2)
+/* Fill the inverse-colormap entries in the update box that contains */
+/* histogram cell c0/c1/c2.  (Only that one cell MUST be filled, but */
+/* we can fill as many others as we wish.) */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  hist3d histogram = cquantize->histogram;
+  int minc0, minc1, minc2;	/* lower left corner of update box */
+  int ic0, ic1, ic2;
+  register JSAMPLE * cptr;	/* pointer into bestcolor[] array */
+  register histptr cachep;	/* pointer into main cache array */
+  /* This array lists the candidate colormap indexes. */
+  JSAMPLE colorlist[MAXNUMCOLORS];
+  int numcolors;		/* number of candidate colors */
+  /* This array holds the actually closest colormap index for each cell. */
+  JSAMPLE bestcolor[BOX_C0_ELEMS * BOX_C1_ELEMS * BOX_C2_ELEMS];
+
+  /* Convert cell coordinates to update box ID */
+  c0 >>= BOX_C0_LOG;
+  c1 >>= BOX_C1_LOG;
+  c2 >>= BOX_C2_LOG;
+
+  /* Compute true coordinates of update box's origin corner.
+   * Actually we compute the coordinates of the center of the corner
+   * histogram cell, which are the lower bounds of the volume we care about.
+   */
+  minc0 = (c0 << BOX_C0_SHIFT) + ((1 << C0_SHIFT) >> 1);
+  minc1 = (c1 << BOX_C1_SHIFT) + ((1 << C1_SHIFT) >> 1);
+  minc2 = (c2 << BOX_C2_SHIFT) + ((1 << C2_SHIFT) >> 1);
+  
+  /* Determine which colormap entries are close enough to be candidates
+   * for the nearest entry to some cell in the update box.
+   */
+  numcolors = find_nearby_colors(cinfo, minc0, minc1, minc2, colorlist);
+
+  /* Determine the actually nearest colors. */
+  find_best_colors(cinfo, minc0, minc1, minc2, numcolors, colorlist,
+		   bestcolor);
+
+  /* Save the best color numbers (plus 1) in the main cache array */
+  c0 <<= BOX_C0_LOG;		/* convert ID back to base cell indexes */
+  c1 <<= BOX_C1_LOG;
+  c2 <<= BOX_C2_LOG;
+  cptr = bestcolor;
+  for (ic0 = 0; ic0 < BOX_C0_ELEMS; ic0++) {
+    for (ic1 = 0; ic1 < BOX_C1_ELEMS; ic1++) {
+      cachep = & histogram[c0+ic0][c1+ic1][c2];
+      for (ic2 = 0; ic2 < BOX_C2_ELEMS; ic2++) {
+	*cachep++ = (histcell) (GETJSAMPLE(*cptr++) + 1);
+      }
+    }
+  }
+}
+
+
+/*
+ * Map some rows of pixels to the output colormapped representation.
+ */
+
+METHODDEF(void)
+pass2_no_dither (j_decompress_ptr cinfo,
+		 JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
+/* This version performs no dithering */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  hist3d histogram = cquantize->histogram;
+  register JSAMPROW inptr, outptr;
+  register histptr cachep;
+  register int c0, c1, c2;
+  int row;
+  JDIMENSION col;
+  JDIMENSION width = cinfo->output_width;
+
+  for (row = 0; row < num_rows; row++) {
+    inptr = input_buf[row];
+    outptr = output_buf[row];
+    for (col = width; col > 0; col--) {
+      /* get pixel value and index into the cache */
+      c0 = GETJSAMPLE(*inptr++) >> C0_SHIFT;
+      c1 = GETJSAMPLE(*inptr++) >> C1_SHIFT;
+      c2 = GETJSAMPLE(*inptr++) >> C2_SHIFT;
+      cachep = & histogram[c0][c1][c2];
+      /* If we have not seen this color before, find nearest colormap entry */
+      /* and update the cache */
+      if (*cachep == 0)
+	fill_inverse_cmap(cinfo, c0,c1,c2);
+      /* Now emit the colormap index for this cell */
+      *outptr++ = (JSAMPLE) (*cachep - 1);
+    }
+  }
+}
+
+
+METHODDEF(void)
+pass2_fs_dither (j_decompress_ptr cinfo,
+		 JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
+/* This version performs Floyd-Steinberg dithering */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  hist3d histogram = cquantize->histogram;
+  register LOCFSERROR cur0, cur1, cur2;	/* current error or pixel value */
+  LOCFSERROR belowerr0, belowerr1, belowerr2; /* error for pixel below cur */
+  LOCFSERROR bpreverr0, bpreverr1, bpreverr2; /* error for below/prev col */
+  register FSERRPTR errorptr;	/* => fserrors[] at column before current */
+  JSAMPROW inptr;		/* => current input pixel */
+  JSAMPROW outptr;		/* => current output pixel */
+  histptr cachep;
+  int dir;			/* +1 or -1 depending on direction */
+  int dir3;			/* 3*dir, for advancing inptr & errorptr */
+  int row;
+  JDIMENSION col;
+  JDIMENSION width = cinfo->output_width;
+  JSAMPLE *range_limit = cinfo->sample_range_limit;
+  int *error_limit = cquantize->error_limiter;
+  JSAMPROW colormap0 = cinfo->colormap[0];
+  JSAMPROW colormap1 = cinfo->colormap[1];
+  JSAMPROW colormap2 = cinfo->colormap[2];
+  SHIFT_TEMPS
+
+  for (row = 0; row < num_rows; row++) {
+    inptr = input_buf[row];
+    outptr = output_buf[row];
+    if (cquantize->on_odd_row) {
+      /* work right to left in this row */
+      inptr += (width-1) * 3;	/* so point to rightmost pixel */
+      outptr += width-1;
+      dir = -1;
+      dir3 = -3;
+      errorptr = cquantize->fserrors + (width+1)*3; /* => entry after last column */
+      cquantize->on_odd_row = FALSE; /* flip for next time */
+    } else {
+      /* work left to right in this row */
+      dir = 1;
+      dir3 = 3;
+      errorptr = cquantize->fserrors; /* => entry before first real column */
+      cquantize->on_odd_row = TRUE; /* flip for next time */
+    }
+    /* Preset error values: no error propagated to first pixel from left */
+    cur0 = cur1 = cur2 = 0;
+    /* and no error propagated to row below yet */
+    belowerr0 = belowerr1 = belowerr2 = 0;
+    bpreverr0 = bpreverr1 = bpreverr2 = 0;
+
+    for (col = width; col > 0; col--) {
+      /* curN holds the error propagated from the previous pixel on the
+       * current line.  Add the error propagated from the previous line
+       * to form the complete error correction term for this pixel, and
+       * round the error term (which is expressed * 16) to an integer.
+       * RIGHT_SHIFT rounds towards minus infinity, so adding 8 is correct
+       * for either sign of the error value.
+       * Note: errorptr points to *previous* column's array entry.
+       */
+      cur0 = RIGHT_SHIFT(cur0 + errorptr[dir3+0] + 8, 4);
+      cur1 = RIGHT_SHIFT(cur1 + errorptr[dir3+1] + 8, 4);
+      cur2 = RIGHT_SHIFT(cur2 + errorptr[dir3+2] + 8, 4);
+      /* Limit the error using transfer function set by init_error_limit.
+       * See comments with init_error_limit for rationale.
+       */
+      cur0 = error_limit[cur0];
+      cur1 = error_limit[cur1];
+      cur2 = error_limit[cur2];
+      /* Form pixel value + error, and range-limit to 0..MAXJSAMPLE.
+       * The maximum error is +- MAXJSAMPLE (or less with error limiting);
+       * this sets the required size of the range_limit array.
+       */
+      cur0 += GETJSAMPLE(inptr[0]);
+      cur1 += GETJSAMPLE(inptr[1]);
+      cur2 += GETJSAMPLE(inptr[2]);
+      cur0 = GETJSAMPLE(range_limit[cur0]);
+      cur1 = GETJSAMPLE(range_limit[cur1]);
+      cur2 = GETJSAMPLE(range_limit[cur2]);
+      /* Index into the cache with adjusted pixel value */
+      cachep = & histogram[cur0>>C0_SHIFT][cur1>>C1_SHIFT][cur2>>C2_SHIFT];
+      /* If we have not seen this color before, find nearest colormap */
+      /* entry and update the cache */
+      if (*cachep == 0)
+	fill_inverse_cmap(cinfo, cur0>>C0_SHIFT,cur1>>C1_SHIFT,cur2>>C2_SHIFT);
+      /* Now emit the colormap index for this cell */
+      { register int pixcode = *cachep - 1;
+	*outptr = (JSAMPLE) pixcode;
+	/* Compute representation error for this pixel */
+	cur0 -= GETJSAMPLE(colormap0[pixcode]);
+	cur1 -= GETJSAMPLE(colormap1[pixcode]);
+	cur2 -= GETJSAMPLE(colormap2[pixcode]);
+      }
+      /* Compute error fractions to be propagated to adjacent pixels.
+       * Add these into the running sums, and simultaneously shift the
+       * next-line error sums left by 1 column.
+       */
+      { register LOCFSERROR bnexterr, delta;
+
+	bnexterr = cur0;	/* Process component 0 */
+	delta = cur0 * 2;
+	cur0 += delta;		/* form error * 3 */
+	errorptr[0] = (FSERROR) (bpreverr0 + cur0);
+	cur0 += delta;		/* form error * 5 */
+	bpreverr0 = belowerr0 + cur0;
+	belowerr0 = bnexterr;
+	cur0 += delta;		/* form error * 7 */
+	bnexterr = cur1;	/* Process component 1 */
+	delta = cur1 * 2;
+	cur1 += delta;		/* form error * 3 */
+	errorptr[1] = (FSERROR) (bpreverr1 + cur1);
+	cur1 += delta;		/* form error * 5 */
+	bpreverr1 = belowerr1 + cur1;
+	belowerr1 = bnexterr;
+	cur1 += delta;		/* form error * 7 */
+	bnexterr = cur2;	/* Process component 2 */
+	delta = cur2 * 2;
+	cur2 += delta;		/* form error * 3 */
+	errorptr[2] = (FSERROR) (bpreverr2 + cur2);
+	cur2 += delta;		/* form error * 5 */
+	bpreverr2 = belowerr2 + cur2;
+	belowerr2 = bnexterr;
+	cur2 += delta;		/* form error * 7 */
+      }
+      /* At this point curN contains the 7/16 error value to be propagated
+       * to the next pixel on the current line, and all the errors for the
+       * next line have been shifted over.  We are therefore ready to move on.
+       */
+      inptr += dir3;		/* Advance pixel pointers to next column */
+      outptr += dir;
+      errorptr += dir3;		/* advance errorptr to current column */
+    }
+    /* Post-loop cleanup: we must unload the final error values into the
+     * final fserrors[] entry.  Note we need not unload belowerrN because
+     * it is for the dummy column before or after the actual array.
+     */
+    errorptr[0] = (FSERROR) bpreverr0; /* unload prev errs into array */
+    errorptr[1] = (FSERROR) bpreverr1;
+    errorptr[2] = (FSERROR) bpreverr2;
+  }
+}
+
+
+/*
+ * Initialize the error-limiting transfer function (lookup table).
+ * The raw F-S error computation can potentially compute error values of up to
+ * +- MAXJSAMPLE.  But we want the maximum correction applied to a pixel to be
+ * much less, otherwise obviously wrong pixels will be created.  (Typical
+ * effects include weird fringes at color-area boundaries, isolated bright
+ * pixels in a dark area, etc.)  The standard advice for avoiding this problem
+ * is to ensure that the "corners" of the color cube are allocated as output
+ * colors; then repeated errors in the same direction cannot cause cascading
+ * error buildup.  However, that only prevents the error from getting
+ * completely out of hand; Aaron Giles reports that error limiting improves
+ * the results even with corner colors allocated.
+ * A simple clamping of the error values to about +- MAXJSAMPLE/8 works pretty
+ * well, but the smoother transfer function used below is even better.  Thanks
+ * to Aaron Giles for this idea.
+ */
+
+LOCAL(void)
+init_error_limit (j_decompress_ptr cinfo)
+/* Allocate and fill in the error_limiter table */
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  int * table;
+  int in, out;
+
+  table = (int *) (*cinfo->mem->alloc_small)
+    ((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE*2+1) * SIZEOF(int));
+  table += MAXJSAMPLE;		/* so can index -MAXJSAMPLE .. +MAXJSAMPLE */
+  cquantize->error_limiter = table;
+
+#define STEPSIZE ((MAXJSAMPLE+1)/16)
+  /* Map errors 1:1 up to +- MAXJSAMPLE/16 */
+  out = 0;
+  for (in = 0; in < STEPSIZE; in++, out++) {
+    table[in] = out; table[-in] = -out;
+  }
+  /* Map errors 1:2 up to +- 3*MAXJSAMPLE/16 */
+  for (; in < STEPSIZE*3; in++, out += (in&1) ? 0 : 1) {
+    table[in] = out; table[-in] = -out;
+  }
+  /* Clamp the rest to final out value (which is (MAXJSAMPLE+1)/8) */
+  for (; in <= MAXJSAMPLE; in++) {
+    table[in] = out; table[-in] = -out;
+  }
+#undef STEPSIZE
+}
+
+
+/*
+ * Finish up at the end of each pass.
+ */
+
+METHODDEF(void)
+finish_pass1 (j_decompress_ptr cinfo)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+
+  /* Select the representative colors and fill in cinfo->colormap */
+  cinfo->colormap = cquantize->sv_colormap;
+  select_colors(cinfo, cquantize->desired);
+  /* Force next pass to zero the color index table */
+  cquantize->needs_zeroed = TRUE;
+}
+
+
+METHODDEF(void)
+finish_pass2 (j_decompress_ptr cinfo)
+{
+  /* no work */
+}
+
+
+/*
+ * Initialize for each processing pass.
+ */
+
+METHODDEF(void)
+start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+  hist3d histogram = cquantize->histogram;
+  int i;
+
+  /* Only F-S dithering or no dithering is supported. */
+  /* If user asks for ordered dither, give him F-S. */
+  if (cinfo->dither_mode != JDITHER_NONE)
+    cinfo->dither_mode = JDITHER_FS;
+
+  if (is_pre_scan) {
+    /* Set up method pointers */
+    cquantize->pub.color_quantize = prescan_quantize;
+    cquantize->pub.finish_pass = finish_pass1;
+    cquantize->needs_zeroed = TRUE; /* Always zero histogram */
+  } else {
+    /* Set up method pointers */
+    if (cinfo->dither_mode == JDITHER_FS)
+      cquantize->pub.color_quantize = pass2_fs_dither;
+    else
+      cquantize->pub.color_quantize = pass2_no_dither;
+    cquantize->pub.finish_pass = finish_pass2;
+
+    /* Make sure color count is acceptable */
+    i = cinfo->actual_number_of_colors;
+    if (i < 1)
+      ERREXIT1(cinfo, JERR_QUANT_FEW_COLORS, 1);
+    if (i > MAXNUMCOLORS)
+      ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXNUMCOLORS);
+
+    if (cinfo->dither_mode == JDITHER_FS) {
+      size_t arraysize = (size_t) ((cinfo->output_width + 2) *
+				   (3 * SIZEOF(FSERROR)));
+      /* Allocate Floyd-Steinberg workspace if we didn't already. */
+      if (cquantize->fserrors == NULL)
+	cquantize->fserrors = (FSERRPTR) (*cinfo->mem->alloc_large)
+	  ((j_common_ptr) cinfo, JPOOL_IMAGE, arraysize);
+      /* Initialize the propagated errors to zero. */
+      jzero_far((void FAR *) cquantize->fserrors, arraysize);
+      /* Make the error-limit table if we didn't already. */
+      if (cquantize->error_limiter == NULL)
+	init_error_limit(cinfo);
+      cquantize->on_odd_row = FALSE;
+    }
+
+  }
+  /* Zero the histogram or inverse color map, if necessary */
+  if (cquantize->needs_zeroed) {
+    for (i = 0; i < HIST_C0_ELEMS; i++) {
+      jzero_far((void FAR *) histogram[i],
+		HIST_C1_ELEMS*HIST_C2_ELEMS * SIZEOF(histcell));
+    }
+    cquantize->needs_zeroed = FALSE;
+  }
+}
+
+
+/*
+ * Switch to a new external colormap between output passes.
+ */
+
+METHODDEF(void)
+new_color_map_2_quant (j_decompress_ptr cinfo)
+{
+  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
+
+  /* Reset the inverse color map */
+  cquantize->needs_zeroed = TRUE;
+}
+
+
+/*
+ * Module initialization routine for 2-pass color quantization.
+ */
+
+GLOBAL(void)
+jinit_2pass_quantizer (j_decompress_ptr cinfo)
+{
+  my_cquantize_ptr cquantize;
+  int i;
+
+  cquantize = (my_cquantize_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(my_cquantizer));
+  cinfo->cquantize = (struct jpeg_color_quantizer *) cquantize;
+  cquantize->pub.start_pass = start_pass_2_quant;
+  cquantize->pub.new_color_map = new_color_map_2_quant;
+  cquantize->fserrors = NULL;	/* flag optional arrays not allocated */
+  cquantize->error_limiter = NULL;
+
+  /* Make sure jdmaster didn't give me a case I can't handle */
+  if (cinfo->out_color_components != 3)
+    ERREXIT(cinfo, JERR_NOTIMPL);
+
+  /* Allocate the histogram/inverse colormap storage */
+  cquantize->histogram = (hist3d) (*cinfo->mem->alloc_small)
+    ((j_common_ptr) cinfo, JPOOL_IMAGE, HIST_C0_ELEMS * SIZEOF(hist2d));
+  for (i = 0; i < HIST_C0_ELEMS; i++) {
+    cquantize->histogram[i] = (hist2d) (*cinfo->mem->alloc_large)
+      ((j_common_ptr) cinfo, JPOOL_IMAGE,
+       HIST_C1_ELEMS*HIST_C2_ELEMS * SIZEOF(histcell));
+  }
+  cquantize->needs_zeroed = TRUE; /* histogram is garbage now */
+
+  /* Allocate storage for the completed colormap, if required.
+   * We do this now since it is FAR storage and may affect
+   * the memory manager's space calculations.
+   */
+  if (cinfo->enable_2pass_quant) {
+    /* Make sure color count is acceptable */
+    int desired = cinfo->desired_number_of_colors;
+    /* Lower bound on # of colors ... somewhat arbitrary as long as > 0 */
+    if (desired < 8)
+      ERREXIT1(cinfo, JERR_QUANT_FEW_COLORS, 8);
+    /* Make sure colormap indexes can be represented by JSAMPLEs */
+    if (desired > MAXNUMCOLORS)
+      ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXNUMCOLORS);
+    cquantize->sv_colormap = (*cinfo->mem->alloc_sarray)
+      ((j_common_ptr) cinfo,JPOOL_IMAGE, (JDIMENSION) desired, (JDIMENSION) 3);
+    cquantize->desired = desired;
+  } else
+    cquantize->sv_colormap = NULL;
+
+  /* Only F-S dithering or no dithering is supported. */
+  /* If user asks for ordered dither, give him F-S. */
+  if (cinfo->dither_mode != JDITHER_NONE)
+    cinfo->dither_mode = JDITHER_FS;
+
+  /* Allocate Floyd-Steinberg workspace if necessary.
+   * This isn't really needed until pass 2, but again it is FAR storage.
+   * Although we will cope with a later change in dither_mode,
+   * we do not promise to honor max_memory_to_use if dither_mode changes.
+   */
+  if (cinfo->dither_mode == JDITHER_FS) {
+    cquantize->fserrors = (FSERRPTR) (*cinfo->mem->alloc_large)
+      ((j_common_ptr) cinfo, JPOOL_IMAGE,
+       (size_t) ((cinfo->output_width + 2) * (3 * SIZEOF(FSERROR))));
+    /* Might as well create the error-limiting table too. */
+    init_error_limit(cinfo);
+  }
+}
+
+#endif /* QUANT_2PASS_SUPPORTED */
diff --git a/common/jpeg/jutils.c b/common/jpeg/jutils.c
new file mode 100644
index 00000000..d18a9555
--- /dev/null
+++ b/common/jpeg/jutils.c
@@ -0,0 +1,179 @@
+/*
+ * jutils.c
+ *
+ * Copyright (C) 1991-1996, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains tables and miscellaneous utility routines needed
+ * for both compression and decompression.
+ * Note we prefix all global names with "j" to minimize conflicts with
+ * a surrounding application.
+ */
+
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+
+
+/*
+ * jpeg_zigzag_order[i] is the zigzag-order position of the i'th element
+ * of a DCT block read in natural order (left to right, top to bottom).
+ */
+
+#if 0				/* This table is not actually needed in v6a */
+
+const int jpeg_zigzag_order[DCTSIZE2] = {
+   0,  1,  5,  6, 14, 15, 27, 28,
+   2,  4,  7, 13, 16, 26, 29, 42,
+   3,  8, 12, 17, 25, 30, 41, 43,
+   9, 11, 18, 24, 31, 40, 44, 53,
+  10, 19, 23, 32, 39, 45, 52, 54,
+  20, 22, 33, 38, 46, 51, 55, 60,
+  21, 34, 37, 47, 50, 56, 59, 61,
+  35, 36, 48, 49, 57, 58, 62, 63
+};
+
+#endif
+
+/*
+ * jpeg_natural_order[i] is the natural-order position of the i'th element
+ * of zigzag order.
+ *
+ * When reading corrupted data, the Huffman decoders could attempt
+ * to reference an entry beyond the end of this array (if the decoded
+ * zero run length reaches past the end of the block).  To prevent
+ * wild stores without adding an inner-loop test, we put some extra
+ * "63"s after the real entries.  This will cause the extra coefficient
+ * to be stored in location 63 of the block, not somewhere random.
+ * The worst case would be a run-length of 15, which means we need 16
+ * fake entries.
+ */
+
+const int jpeg_natural_order[DCTSIZE2+16] = {
+  0,  1,  8, 16,  9,  2,  3, 10,
+ 17, 24, 32, 25, 18, 11,  4,  5,
+ 12, 19, 26, 33, 40, 48, 41, 34,
+ 27, 20, 13,  6,  7, 14, 21, 28,
+ 35, 42, 49, 56, 57, 50, 43, 36,
+ 29, 22, 15, 23, 30, 37, 44, 51,
+ 58, 59, 52, 45, 38, 31, 39, 46,
+ 53, 60, 61, 54, 47, 55, 62, 63,
+ 63, 63, 63, 63, 63, 63, 63, 63, /* extra entries for safety in decoder */
+ 63, 63, 63, 63, 63, 63, 63, 63
+};
+
+
+/*
+ * Arithmetic utilities
+ */
+
+GLOBAL(long)
+jdiv_round_up (long a, long b)
+/* Compute a/b rounded up to next integer, ie, ceil(a/b) */
+/* Assumes a >= 0, b > 0 */
+{
+  return (a + b - 1L) / b;
+}
+
+
+GLOBAL(long)
+jround_up (long a, long b)
+/* Compute a rounded up to next multiple of b, ie, ceil(a/b)*b */
+/* Assumes a >= 0, b > 0 */
+{
+  a += b - 1L;
+  return a - (a % b);
+}
+
+
+/* On normal machines we can apply MEMCOPY() and MEMZERO() to sample arrays
+ * and coefficient-block arrays.  This won't work on 80x86 because the arrays
+ * are FAR and we're assuming a small-pointer memory model.  However, some
+ * DOS compilers provide far-pointer versions of memcpy() and memset() even
+ * in the small-model libraries.  These will be used if USE_FMEM is defined.
+ * Otherwise, the routines below do it the hard way.  (The performance cost
+ * is not all that great, because these routines aren't very heavily used.)
+ */
+
+#ifndef NEED_FAR_POINTERS	/* normal case, same as regular macros */
+#define FMEMCOPY(dest,src,size)	MEMCOPY(dest,src,size)
+#define FMEMZERO(target,size)	MEMZERO(target,size)
+#else				/* 80x86 case, define if we can */
+#ifdef USE_FMEM
+#define FMEMCOPY(dest,src,size)	_fmemcpy((void FAR *)(dest), (const void FAR *)(src), (size_t)(size))
+#define FMEMZERO(target,size)	_fmemset((void FAR *)(target), 0, (size_t)(size))
+#endif
+#endif
+
+
+GLOBAL(void)
+jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
+		   JSAMPARRAY output_array, int dest_row,
+		   int num_rows, JDIMENSION num_cols)
+/* Copy some rows of samples from one place to another.
+ * num_rows rows are copied from input_array[source_row++]
+ * to output_array[dest_row++]; these areas may overlap for duplication.
+ * The source and destination arrays must be at least as wide as num_cols.
+ */
+{
+  register JSAMPROW inptr, outptr;
+#ifdef FMEMCOPY
+  register size_t count = (size_t) (num_cols * SIZEOF(JSAMPLE));
+#else
+  register JDIMENSION count;
+#endif
+  register int row;
+
+  input_array += source_row;
+  output_array += dest_row;
+
+  for (row = num_rows; row > 0; row--) {
+    inptr = *input_array++;
+    outptr = *output_array++;
+#ifdef FMEMCOPY
+    FMEMCOPY(outptr, inptr, count);
+#else
+    for (count = num_cols; count > 0; count--)
+      *outptr++ = *inptr++;	/* needn't bother with GETJSAMPLE() here */
+#endif
+  }
+}
+
+
+GLOBAL(void)
+jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
+		 JDIMENSION num_blocks)
+/* Copy a row of coefficient blocks from one place to another. */
+{
+#ifdef FMEMCOPY
+  FMEMCOPY(output_row, input_row, num_blocks * (DCTSIZE2 * SIZEOF(JCOEF)));
+#else
+  register JCOEFPTR inptr, outptr;
+  register long count;
+
+  inptr = (JCOEFPTR) input_row;
+  outptr = (JCOEFPTR) output_row;
+  for (count = (long) num_blocks * DCTSIZE2; count > 0; count--) {
+    *outptr++ = *inptr++;
+  }
+#endif
+}
+
+
+GLOBAL(void)
+jzero_far (void FAR * target, size_t bytestozero)
+/* Zero out a chunk of FAR memory. */
+/* This might be sample-array data, block-array data, or alloc_large data. */
+{
+#ifdef FMEMZERO
+  FMEMZERO(target, bytestozero);
+#else
+  register char FAR * ptr = (char FAR *) target;
+  register size_t count;
+
+  for (count = bytestozero; count > 0; count--) {
+    *ptr++ = 0;
+  }
+#endif
+}
diff --git a/common/jpeg/jversion.h b/common/jpeg/jversion.h
new file mode 100644
index 00000000..6472c58d
--- /dev/null
+++ b/common/jpeg/jversion.h
@@ -0,0 +1,14 @@
+/*
+ * jversion.h
+ *
+ * Copyright (C) 1991-1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains software version identification.
+ */
+
+
+#define JVERSION	"6b  27-Mar-1998"
+
+#define JCOPYRIGHT	"Copyright (C) 1998, Thomas G. Lane"
diff --git a/common/jpeg/makefile.cfg b/common/jpeg/makefile.cfg
new file mode 100644
index 00000000..7bb3b9df
--- /dev/null
+++ b/common/jpeg/makefile.cfg
@@ -0,0 +1,319 @@
+# Makefile for Independent JPEG Group's software
+
+# makefile.cfg is edited by configure to produce a custom Makefile.
+
+# Read installation instructions before saying "make" !!
+
+# For compiling with source and object files in different directories.
+srcdir = @srcdir@
+VPATH = @srcdir@
+
+# Where to install the programs and man pages.
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+bindir = $(exec_prefix)/bin
+libdir = $(exec_prefix)/lib
+includedir = $(prefix)/include
+binprefix =
+manprefix =
+manext = 1
+mandir = $(prefix)/man/man$(manext)
+
+# The name of your C compiler:
+CC= @CC@
+
+# You may need to adjust these cc options:
+CFLAGS= @CFLAGS@ @CPPFLAGS@ @INCLUDEFLAGS@
+# Generally, we recommend defining any configuration symbols in jconfig.h,
+# NOT via -D switches here.
+# However, any special defines for ansi2knr.c may be included here:
+ANSI2KNRFLAGS= @ANSI2KNRFLAGS@
+
+# Link-time cc options:
+LDFLAGS= @LDFLAGS@
+
+# To link any special libraries, add the necessary -l commands here.
+LDLIBS= @LIBS@
+
+# If using GNU libtool, LIBTOOL references it; if not, LIBTOOL is empty.
+LIBTOOL = @LIBTOOL@
+# $(O) expands to "lo" if using libtool, plain "o" if not.
+# Similarly, $(A) expands to "la" or "a".
+O = @O@
+A = @A@
+
+# Library version ID; libtool uses this for the shared library version number.
+# Note: we suggest this match the macro of the same name in jpeglib.h.
+JPEG_LIB_VERSION = @JPEG_LIB_VERSION@
+
+# Put here the object file name for the correct system-dependent memory
+# manager file.  For Unix this is usually jmemnobs.o, but you may want
+# to use jmemansi.o or jmemname.o if you have limited swap space.
+SYSDEPMEM= @MEMORYMGR@
+
+# miscellaneous OS-dependent stuff
+SHELL= /bin/sh
+# linker
+LN= @LN@
+# file deletion command
+RM= rm -f
+# directory creation command
+MKDIR= mkdir
+# library (.a) file creation command
+AR= ar rc
+# second step in .a creation (use "touch" if not needed)
+AR2= @RANLIB@
+# installation program
+INSTALL= @INSTALL@
+INSTALL_PROGRAM= @INSTALL_PROGRAM@
+INSTALL_LIB= @INSTALL_LIB@
+INSTALL_DATA= @INSTALL_DATA@
+
+# End of configurable options.
+
+
+# source files: JPEG library proper
+LIBSOURCES= jcapimin.c jcapistd.c jccoefct.c jccolor.c jcdctmgr.c jchuff.c \
+        jcinit.c jcmainct.c jcmarker.c jcmaster.c jcomapi.c jcparam.c \
+        jcphuff.c jcprepct.c jcsample.c jctrans.c jdapimin.c jdapistd.c \
+        jdatadst.c jdatasrc.c jdcoefct.c jdcolor.c jddctmgr.c jdhuff.c \
+        jdinput.c jdmainct.c jdmarker.c jdmaster.c jdmerge.c jdphuff.c \
+        jdpostct.c jdsample.c jdtrans.c jerror.c jfdctflt.c jfdctfst.c \
+        jfdctint.c jidctflt.c jidctfst.c jidctint.c jidctred.c jquant1.c \
+        jquant2.c jutils.c jmemmgr.c
+# memmgr back ends: compile only one of these into a working library
+SYSDEPSOURCES= jmemansi.c jmemname.c jmemnobs.c jmemdos.c jmemmac.c
+# source files: cjpeg/djpeg/jpegtran applications, also rdjpgcom/wrjpgcom
+APPSOURCES= cjpeg.c djpeg.c jpegtran.c rdjpgcom.c wrjpgcom.c cdjpeg.c \
+        rdcolmap.c rdswitch.c transupp.c rdppm.c wrppm.c rdgif.c wrgif.c \
+        rdtarga.c wrtarga.c rdbmp.c wrbmp.c rdrle.c wrrle.c
+SOURCES= $(LIBSOURCES) $(SYSDEPSOURCES) $(APPSOURCES)
+# files included by source files
+INCLUDES= jchuff.h jdhuff.h jdct.h jerror.h jinclude.h jmemsys.h jmorecfg.h \
+        jpegint.h jpeglib.h jversion.h cdjpeg.h cderror.h transupp.h
+# documentation, test, and support files
+DOCS= README install.doc usage.doc cjpeg.1 djpeg.1 jpegtran.1 rdjpgcom.1 \
+        wrjpgcom.1 wizard.doc example.c libjpeg.doc structure.doc \
+        coderules.doc filelist.doc change.log
+MKFILES= configure makefile.cfg makefile.ansi makefile.unix makefile.bcc \
+        makefile.mc6 makefile.dj makefile.wat makefile.vc makelib.ds \
+        makeapps.ds makeproj.mac makcjpeg.st makdjpeg.st makljpeg.st \
+        maktjpeg.st makefile.manx makefile.sas makefile.mms makefile.vms \
+        makvms.opt
+CONFIGFILES= jconfig.cfg jconfig.bcc jconfig.mc6 jconfig.dj jconfig.wat \
+        jconfig.vc jconfig.mac jconfig.st jconfig.manx jconfig.sas \
+        jconfig.vms
+CONFIGUREFILES= config.guess config.sub install-sh ltconfig ltmain.sh
+OTHERFILES= jconfig.doc ckconfig.c ansi2knr.c ansi2knr.1 jmemdosa.asm
+TESTFILES= testorig.jpg testimg.ppm testimg.bmp testimg.jpg testprog.jpg \
+        testimgp.jpg
+DISTFILES= $(DOCS) $(MKFILES) $(CONFIGFILES) $(SOURCES) $(INCLUDES) \
+        $(CONFIGUREFILES) $(OTHERFILES) $(TESTFILES)
+# library object files common to compression and decompression
+COMOBJECTS= jcomapi.$(O) jutils.$(O) jerror.$(O) jmemmgr.$(O) $(SYSDEPMEM)
+# compression library object files
+CLIBOBJECTS= jcapimin.$(O) jcapistd.$(O) jctrans.$(O) jcparam.$(O) \
+        jdatadst.$(O) jcinit.$(O) jcmaster.$(O) jcmarker.$(O) jcmainct.$(O) \
+        jcprepct.$(O) jccoefct.$(O) jccolor.$(O) jcsample.$(O) jchuff.$(O) \
+        jcphuff.$(O) jcdctmgr.$(O) jfdctfst.$(O) jfdctflt.$(O) \
+        jfdctint.$(O)
+# decompression library object files
+DLIBOBJECTS= jdapimin.$(O) jdapistd.$(O) jdtrans.$(O) jdatasrc.$(O) \
+        jdmaster.$(O) jdinput.$(O) jdmarker.$(O) jdhuff.$(O) jdphuff.$(O) \
+        jdmainct.$(O) jdcoefct.$(O) jdpostct.$(O) jddctmgr.$(O) \
+        jidctfst.$(O) jidctflt.$(O) jidctint.$(O) jidctred.$(O) \
+        jdsample.$(O) jdcolor.$(O) jquant1.$(O) jquant2.$(O) jdmerge.$(O)
+# These objectfiles are included in libjpeg.a
+LIBOBJECTS= $(CLIBOBJECTS) $(DLIBOBJECTS) $(COMOBJECTS)
+# object files for sample applications (excluding library files)
+COBJECTS= cjpeg.$(O) rdppm.$(O) rdgif.$(O) rdtarga.$(O) rdrle.$(O) \
+        rdbmp.$(O) rdswitch.$(O) cdjpeg.$(O)
+DOBJECTS= djpeg.$(O) wrppm.$(O) wrgif.$(O) wrtarga.$(O) wrrle.$(O) \
+        wrbmp.$(O) rdcolmap.$(O) cdjpeg.$(O)
+TROBJECTS= jpegtran.$(O) rdswitch.$(O) cdjpeg.$(O) transupp.$(O)
+
+
+all: @A2K_DEPS@ libjpeg.$(A)
+
+# Special compilation rules to support ansi2knr and libtool.
+.SUFFIXES: .lo .la
+
+# How to compile with libtool.
+@COM_LT@.c.lo:
+@COM_LT@	$(LIBTOOL) --mode=compile $(CC) $(CFLAGS) -c $(srcdir)/$*.c
+
+# How to use ansi2knr, when not using libtool.
+@COM_A2K@.c.o:
+@COM_A2K@	./ansi2knr $(srcdir)/$*.c knr/$*.c
+@COM_A2K@	$(CC) $(CFLAGS) -c knr/$*.c
+@COM_A2K@	$(RM) knr/$*.c
+
+# How to use ansi2knr AND libtool.
+@COM_A2K@.c.lo:
+@COM_A2K@	./ansi2knr $(srcdir)/$*.c knr/$*.c
+@COM_A2K@	$(LIBTOOL) --mode=compile $(CC) $(CFLAGS) -c knr/$*.c
+@COM_A2K@	$(RM) knr/$*.c
+
+ansi2knr: ansi2knr.c
+	$(CC) $(CFLAGS) $(ANSI2KNRFLAGS) -o ansi2knr $(srcdir)/ansi2knr.c
+	$(MKDIR) knr
+
+# the library:
+
+# without libtool:
+libjpeg.a: @A2K_DEPS@ $(LIBOBJECTS)
+	$(RM) libjpeg.a
+	$(AR) libjpeg.a  $(LIBOBJECTS)
+	$(AR2) libjpeg.a
+
+# with libtool:
+libjpeg.la: @A2K_DEPS@ $(LIBOBJECTS)
+	$(LIBTOOL) --mode=link $(CC) -o libjpeg.la $(LIBOBJECTS) \
+		-rpath $(libdir) -version-info $(JPEG_LIB_VERSION)
+
+# sample programs:
+
+cjpeg: $(COBJECTS) libjpeg.$(A)
+	$(LN) $(LDFLAGS) -o cjpeg $(COBJECTS) libjpeg.$(A) $(LDLIBS)
+
+djpeg: $(DOBJECTS) libjpeg.$(A)
+	$(LN) $(LDFLAGS) -o djpeg $(DOBJECTS) libjpeg.$(A) $(LDLIBS)
+
+jpegtran: $(TROBJECTS) libjpeg.$(A)
+	$(LN) $(LDFLAGS) -o jpegtran $(TROBJECTS) libjpeg.$(A) $(LDLIBS)
+
+rdjpgcom: rdjpgcom.$(O)
+	$(LN) $(LDFLAGS) -o rdjpgcom rdjpgcom.$(O) $(LDLIBS)
+
+wrjpgcom: wrjpgcom.$(O)
+	$(LN) $(LDFLAGS) -o wrjpgcom wrjpgcom.$(O) $(LDLIBS)
+
+# Installation rules:
+
+install: cjpeg djpeg jpegtran rdjpgcom wrjpgcom @FORCE_INSTALL_LIB@
+	$(INSTALL_PROGRAM) cjpeg $(bindir)/$(binprefix)cjpeg
+	$(INSTALL_PROGRAM) djpeg $(bindir)/$(binprefix)djpeg
+	$(INSTALL_PROGRAM) jpegtran $(bindir)/$(binprefix)jpegtran
+	$(INSTALL_PROGRAM) rdjpgcom $(bindir)/$(binprefix)rdjpgcom
+	$(INSTALL_PROGRAM) wrjpgcom $(bindir)/$(binprefix)wrjpgcom
+	$(INSTALL_DATA) $(srcdir)/cjpeg.1 $(mandir)/$(manprefix)cjpeg.$(manext)
+	$(INSTALL_DATA) $(srcdir)/djpeg.1 $(mandir)/$(manprefix)djpeg.$(manext)
+	$(INSTALL_DATA) $(srcdir)/jpegtran.1 $(mandir)/$(manprefix)jpegtran.$(manext)
+	$(INSTALL_DATA) $(srcdir)/rdjpgcom.1 $(mandir)/$(manprefix)rdjpgcom.$(manext)
+	$(INSTALL_DATA) $(srcdir)/wrjpgcom.1 $(mandir)/$(manprefix)wrjpgcom.$(manext)
+
+install-lib: libjpeg.$(A) install-headers
+	$(INSTALL_LIB) libjpeg.$(A) $(libdir)/$(binprefix)libjpeg.$(A)
+
+install-headers: jconfig.h
+	$(INSTALL_DATA) jconfig.h $(includedir)/jconfig.h
+	$(INSTALL_DATA) $(srcdir)/jpeglib.h $(includedir)/jpeglib.h
+	$(INSTALL_DATA) $(srcdir)/jmorecfg.h $(includedir)/jmorecfg.h
+	$(INSTALL_DATA) $(srcdir)/jerror.h $(includedir)/jerror.h
+
+clean:
+	$(RM) *.o *.lo libjpeg.a libjpeg.la
+	$(RM) cjpeg djpeg jpegtran rdjpgcom wrjpgcom
+	$(RM) ansi2knr core testout* config.log config.status
+	$(RM) -r knr .libs _libs
+
+distclean: clean
+	$(RM) Makefile jconfig.h libtool config.cache
+
+test: cjpeg djpeg jpegtran
+	$(RM) testout*
+	./djpeg -dct int -ppm -outfile testout.ppm  $(srcdir)/testorig.jpg
+	./djpeg -dct int -bmp -colors 256 -outfile testout.bmp  $(srcdir)/testorig.jpg
+	./cjpeg -dct int -outfile testout.jpg  $(srcdir)/testimg.ppm
+	./djpeg -dct int -ppm -outfile testoutp.ppm $(srcdir)/testprog.jpg
+	./cjpeg -dct int -progressive -opt -outfile testoutp.jpg $(srcdir)/testimg.ppm
+	./jpegtran -outfile testoutt.jpg $(srcdir)/testprog.jpg
+	cmp $(srcdir)/testimg.ppm testout.ppm
+	cmp $(srcdir)/testimg.bmp testout.bmp
+	cmp $(srcdir)/testimg.jpg testout.jpg
+	cmp $(srcdir)/testimg.ppm testoutp.ppm
+	cmp $(srcdir)/testimgp.jpg testoutp.jpg
+	cmp $(srcdir)/testorig.jpg testoutt.jpg
+
+check: test
+
+# Mistake catcher:
+
+jconfig.h: jconfig.doc
+	echo You must prepare a system-dependent jconfig.h file.
+	echo Please read the installation directions in install.doc.
+	exit 1
+
+# GNU Make likes to know which target names are not really files to be made:
+.PHONY: all install install-lib install-headers clean distclean test check
+
+
+jcapimin.$(O): jcapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcapistd.$(O): jcapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jccoefct.$(O): jccoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jccolor.$(O): jccolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcdctmgr.$(O): jcdctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jchuff.$(O): jchuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
+jcinit.$(O): jcinit.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcmainct.$(O): jcmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcmarker.$(O): jcmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcmaster.$(O): jcmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcomapi.$(O): jcomapi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcparam.$(O): jcparam.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcphuff.$(O): jcphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jchuff.h
+jcprepct.$(O): jcprepct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jcsample.$(O): jcsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jctrans.$(O): jctrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdapimin.$(O): jdapimin.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdapistd.$(O): jdapistd.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdatadst.$(O): jdatadst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
+jdatasrc.$(O): jdatasrc.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h
+jdcoefct.$(O): jdcoefct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdcolor.$(O): jdcolor.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jddctmgr.$(O): jddctmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jdhuff.$(O): jdhuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
+jdinput.$(O): jdinput.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdmainct.$(O): jdmainct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdmarker.$(O): jdmarker.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdmaster.$(O): jdmaster.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdmerge.$(O): jdmerge.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdphuff.$(O): jdphuff.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdhuff.h
+jdpostct.$(O): jdpostct.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdsample.$(O): jdsample.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jdtrans.$(O): jdtrans.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jerror.$(O): jerror.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jversion.h jerror.h
+jfdctflt.$(O): jfdctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jfdctfst.$(O): jfdctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jfdctint.$(O): jfdctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jidctflt.$(O): jidctflt.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jidctfst.$(O): jidctfst.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jidctint.$(O): jidctint.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jidctred.$(O): jidctred.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jdct.h
+jquant1.$(O): jquant1.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jquant2.$(O): jquant2.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jutils.$(O): jutils.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h
+jmemmgr.$(O): jmemmgr.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
+jmemansi.$(O): jmemansi.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
+jmemname.$(O): jmemname.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
+jmemnobs.$(O): jmemnobs.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
+jmemdos.$(O): jmemdos.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
+jmemmac.$(O): jmemmac.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h jmemsys.h
+cjpeg.$(O): cjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
+djpeg.$(O): djpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h jversion.h
+jpegtran.$(O): jpegtran.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h transupp.h jversion.h
+rdjpgcom.$(O): rdjpgcom.c jinclude.h jconfig.h
+wrjpgcom.$(O): wrjpgcom.c jinclude.h jconfig.h
+cdjpeg.$(O): cdjpeg.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+rdcolmap.$(O): rdcolmap.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+rdswitch.$(O): rdswitch.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+transupp.$(O): transupp.c jinclude.h jconfig.h jpeglib.h jmorecfg.h jpegint.h jerror.h transupp.h
+rdppm.$(O): rdppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+wrppm.$(O): wrppm.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+rdgif.$(O): rdgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+wrgif.$(O): wrgif.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+rdtarga.$(O): rdtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+wrtarga.$(O): wrtarga.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+rdbmp.$(O): rdbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+wrbmp.$(O): wrbmp.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+rdrle.$(O): rdrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
+wrrle.$(O): wrrle.c cdjpeg.h jinclude.h jconfig.h jpeglib.h jmorecfg.h jerror.h cderror.h
diff --git a/common/network/Makefile.in b/common/network/Makefile.in
new file mode 100644
index 00000000..8aed303a
--- /dev/null
+++ b/common/network/Makefile.in
@@ -0,0 +1,17 @@
+
+SRCS = TcpSocket.cxx
+
+OBJS = $(SRCS:.cxx=.o)
+
+DIR_CPPFLAGS = -I$(top_srcdir) @SOCKLEN_T_DEFINE@
+
+library = libnetwork.a
+
+all:: $(library)
+
+$(library): $(OBJS)
+	rm -f $(library)
+	$(AR) $(library) $(OBJS)
+	$(RANLIB) $(library)
+
+# followed by boilerplate.mk
diff --git a/common/network/Socket.h b/common/network/Socket.h
new file mode 100644
index 00000000..b93da2ef
--- /dev/null
+++ b/common/network/Socket.h
@@ -0,0 +1,149 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Socket.h - abstract base-class for any kind of network stream/socket
+
+#ifndef __NETWORK_SOCKET_H__
+#define __NETWORK_SOCKET_H__
+
+#include <limits.h>
+#include <rdr/FdInStream.h>
+#include <rdr/FdOutStream.h>
+#include <rdr/Exception.h>
+
+namespace network {
+
+  class Socket {
+  public:
+    Socket(int fd)
+      : instream(new rdr::FdInStream(fd)),
+      outstream(new rdr::FdOutStream(fd)),
+      ownStreams(true), isShutdown_(false),
+      queryConnection(false) {}
+    virtual ~Socket() {
+      if (ownStreams) {
+        delete instream;
+        delete outstream;
+      }
+    }
+    rdr::FdInStream &inStream() {return *instream;}
+    rdr::FdOutStream &outStream() {return *outstream;}
+    int getFd() {return outstream->getFd();}
+
+    // if shutdown() is overridden then the override MUST call on to here
+    virtual void shutdown() {isShutdown_ = true;}
+    bool isShutdown() const {return isShutdown_;}
+
+    // information about this end of the socket
+    virtual char* getMyAddress() = 0; // a string e.g. "192.168.0.1"
+    virtual int getMyPort() = 0;
+    virtual char* getMyEndpoint() = 0; // <address>::<port>
+
+    // information about the remote end of the socket
+    virtual char* getPeerAddress() = 0; // a string e.g. "192.168.0.1"
+    virtual int getPeerPort() = 0;
+    virtual char* getPeerEndpoint() = 0; // <address>::<port>
+
+    // Is the remote end on the same machine?
+    virtual bool sameMachine() = 0;
+
+    // Was there a "?" in the ConnectionFilter used to accept this Socket?
+    void setRequiresQuery() {queryConnection = true;}
+    bool requiresQuery() const {return queryConnection;}
+
+  protected:
+    Socket() : instream(0), outstream(0), ownStreams(false),
+      isShutdown_(false), queryConnection(false) {}
+    Socket(rdr::FdInStream* i, rdr::FdOutStream* o, bool own)
+      : instream(i), outstream(o), ownStreams(own),
+      isShutdown_(false), queryConnection(false) {}
+    rdr::FdInStream* instream;
+    rdr::FdOutStream* outstream;
+    bool ownStreams;
+    bool isShutdown_;
+    bool queryConnection;
+  };
+
+  class ConnectionFilter {
+  public:
+    virtual bool verifyConnection(Socket* s) = 0;
+  };
+
+  class SocketListener {
+  public:
+    SocketListener() : fd(0), filter(0) {}
+    virtual ~SocketListener() {}
+
+    // shutdown() stops the socket from accepting further connections
+    virtual void shutdown() = 0;
+
+    // accept() returns a new Socket object if there is a connection
+    // attempt in progress AND if the connection passes the filter
+    // if one is installed.  Otherwise, returns 0.
+    virtual Socket* accept() = 0;
+
+    // setFilter() applies the specified filter to all new connections
+    void setFilter(ConnectionFilter* f) {filter = f;}
+    int getFd() {return fd;}
+  protected:
+    int fd;
+    ConnectionFilter* filter;
+  };
+
+  struct SocketException : public rdr::SystemException {
+    SocketException(const char* text, int err_) : rdr::SystemException(text, err_) {}
+  };
+
+  class SocketServer {
+  public:
+    virtual ~SocketServer() {}
+
+    // addSocket() tells the server to serve the Socket.  The caller
+    //   retains ownership of the Socket - the only way for the server
+    //   to discard a Socket is by calling shutdown() on it.
+    //   outgoing is set to true if the socket was created by connecting out
+    //   to another host, or false if the socket was created by accept()ing
+    //   an incoming connection.
+    virtual void addSocket(network::Socket* sock, bool outgoing=false) = 0;
+
+    // removeSocket() tells the server to stop serving the Socket.  The
+    //   caller retains ownership of the Socket - the server must NOT
+    //   delete the Socket!  This call is used mainly to cause per-Socket
+    //   resources to be freed.
+    virtual void removeSocket(network::Socket* sock) = 0;
+
+    // processSocketEvent() tells the server there is a Socket read event.
+    //   The implementation can indicate that the Socket is no longer active
+    //   by calling shutdown() on it.  The caller will then call removeSocket()
+    //   soon after processSocketEvent returns, to allow any pre-Socket
+    //   resources to be tidied up.
+    virtual void processSocketEvent(network::Socket* sock) = 0;
+
+    // checkTimeouts() allows the server to check socket timeouts, etc.  The
+    //   return value is the number of milliseconds to wait before
+    //   checkTimeouts() should be called again.  If this number is zero then
+    //   there is no timeout and checkTimeouts() should be called the next time
+    //   an event occurs.
+    virtual int checkTimeouts() = 0;
+
+    virtual bool getDisable() {return false;};
+  };
+
+}
+
+#endif // __NETWORK_SOCKET_H__
diff --git a/common/network/TcpSocket.cxx b/common/network/TcpSocket.cxx
new file mode 100644
index 00000000..3212ace7
--- /dev/null
+++ b/common/network/TcpSocket.cxx
@@ -0,0 +1,499 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifdef WIN32
+//#include <io.h>
+#include <winsock2.h>
+#define errorNumber WSAGetLastError()
+#define snprintf _snprintf
+#else
+#define errorNumber errno
+#define closesocket close
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <signal.h>
+#include <fcntl.h>
+#endif
+
+#include <network/TcpSocket.h>
+#include <rfb/util.h>
+#include <rfb/LogWriter.h>
+
+#ifndef VNC_SOCKLEN_T
+#define VNC_SOCKLEN_T int
+#endif
+
+#ifndef INADDR_NONE
+#define INADDR_NONE ((unsigned long)-1)
+#endif
+#ifndef INADDR_LOOPBACK
+#define INADDR_LOOPBACK ((unsigned long)0x7F000001)
+#endif
+
+using namespace network;
+using namespace rdr;
+
+static rfb::LogWriter vlog("TcpSocket");
+
+/* Tunnelling support. */
+int network::findFreeTcpPort (void)
+{
+  int sock, port;
+  struct sockaddr_in addr;
+  memset(&addr, 0, sizeof(addr));
+  addr.sin_family = AF_INET;
+  addr.sin_addr.s_addr = INADDR_ANY;
+
+  if ((sock = socket (AF_INET, SOCK_STREAM, 0)) < 0)
+    throw SocketException ("unable to create socket", errorNumber);
+
+  for (port = TUNNEL_PORT_OFFSET + 99; port > TUNNEL_PORT_OFFSET; port--) {
+    addr.sin_port = htons ((unsigned short) port);
+    if (bind (sock, (struct sockaddr *)&addr, sizeof (addr)) == 0) {
+      closesocket (sock);
+      return port;
+    }
+  }
+  throw SocketException ("no free port in range", 0);
+  return 0;
+}
+
+
+// -=- Socket initialisation
+static bool socketsInitialised = false;
+static void initSockets() {
+  if (socketsInitialised)
+    return;
+#ifdef WIN32
+  WORD requiredVersion = MAKEWORD(2,0);
+  WSADATA initResult;
+  
+  if (WSAStartup(requiredVersion, &initResult) != 0)
+    throw SocketException("unable to initialise Winsock2", errorNumber);
+#else
+  signal(SIGPIPE, SIG_IGN);
+#endif
+  socketsInitialised = true;
+}
+
+
+// -=- TcpSocket
+
+TcpSocket::TcpSocket(int sock, bool close)
+  : Socket(new FdInStream(sock), new FdOutStream(sock), true), closeFd(close)
+{
+}
+
+TcpSocket::TcpSocket(const char *host, int port)
+  : closeFd(true)
+{
+  int sock;
+
+  // - Create a socket
+  initSockets();
+  if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+    throw SocketException("unable to create socket", errorNumber);
+
+#ifndef WIN32
+  // - By default, close the socket on exec()
+  fcntl(sock, F_SETFD, FD_CLOEXEC);
+#endif
+
+  // - Connect it to something
+
+  // Try processing the host as an IP address
+  struct sockaddr_in addr;
+  memset(&addr, 0, sizeof(addr));
+  addr.sin_family = AF_INET;
+  addr.sin_addr.s_addr = inet_addr((char *)host);
+  addr.sin_port = htons(port);
+  if ((int)addr.sin_addr.s_addr == -1) {
+    // Host was not an IP address - try resolving as DNS name
+    struct hostent *hostinfo;
+    hostinfo = gethostbyname((char *)host);
+    if (hostinfo && hostinfo->h_addr) {
+      addr.sin_addr.s_addr = ((struct in_addr *)hostinfo->h_addr)->s_addr;
+    } else {
+      int e = errorNumber;
+      closesocket(sock);
+      throw SocketException("unable to resolve host by name", e);
+    }
+  }
+
+  // Attempt to connect to the remote host
+  for (;;) {
+    if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) != 0) {
+      int e = errorNumber;
+#ifndef WIN32
+      if (e == EINTR)
+	continue;
+#endif
+      closesocket(sock);
+      throw SocketException("unable to connect to host", e);
+    } else break;
+  }
+
+  // Disable Nagle's algorithm, to reduce latency
+  enableNagles(sock, false);
+
+  // Create the input and output streams
+  instream = new FdInStream(sock);
+  outstream = new FdOutStream(sock);
+  ownStreams = true;
+}
+
+TcpSocket::~TcpSocket() {
+  if (closeFd)
+    closesocket(getFd());
+}
+
+char* TcpSocket::getMyAddress() {
+  struct sockaddr_in  info;
+  struct in_addr    addr;
+  VNC_SOCKLEN_T info_size = sizeof(info);
+
+  getsockname(getFd(), (struct sockaddr *)&info, &info_size);
+  memcpy(&addr, &info.sin_addr, sizeof(addr));
+
+  char* name = inet_ntoa(addr);
+  if (name) {
+    return rfb::strDup(name);
+  } else {
+    return rfb::strDup("");
+  }
+}
+
+int TcpSocket::getMyPort() {
+  return getSockPort(getFd());
+}
+
+char* TcpSocket::getMyEndpoint() {
+  rfb::CharArray address; address.buf = getMyAddress();
+  int port = getMyPort();
+
+  int buflen = strlen(address.buf) + 32;
+  char* buffer = new char[buflen];
+  sprintf(buffer, "%s::%d", address.buf, port);
+  return buffer;
+}
+
+char* TcpSocket::getPeerAddress() {
+  struct sockaddr_in  info;
+  struct in_addr    addr;
+  VNC_SOCKLEN_T info_size = sizeof(info);
+
+  getpeername(getFd(), (struct sockaddr *)&info, &info_size);
+  memcpy(&addr, &info.sin_addr, sizeof(addr));
+
+  char* name = inet_ntoa(addr);
+  if (name) {
+    return rfb::strDup(name);
+  } else {
+    return rfb::strDup("");
+  }
+}
+
+int TcpSocket::getPeerPort() {
+  struct sockaddr_in  info;
+  VNC_SOCKLEN_T info_size = sizeof(info);
+
+  getpeername(getFd(), (struct sockaddr *)&info, &info_size);
+  return ntohs(info.sin_port);
+}
+
+char* TcpSocket::getPeerEndpoint() {
+  rfb::CharArray address; address.buf = getPeerAddress();
+  int port = getPeerPort();
+
+  int buflen = strlen(address.buf) + 32;
+  char* buffer = new char[buflen];
+  sprintf(buffer, "%s::%d", address.buf, port);
+  return buffer;
+}
+
+bool TcpSocket::sameMachine() {
+  struct sockaddr_in peeraddr, myaddr;
+  VNC_SOCKLEN_T addrlen = sizeof(struct sockaddr_in);
+
+  getpeername(getFd(), (struct sockaddr *)&peeraddr, &addrlen);
+  getsockname(getFd(), (struct sockaddr *)&myaddr, &addrlen);
+
+  return (peeraddr.sin_addr.s_addr == myaddr.sin_addr.s_addr);
+}
+
+void TcpSocket::shutdown()
+{
+  Socket::shutdown();
+  ::shutdown(getFd(), 2);
+}
+
+bool TcpSocket::enableNagles(int sock, bool enable) {
+  int one = enable ? 0 : 1;
+  if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
+		 (char *)&one, sizeof(one)) < 0) {
+    int e = errorNumber;
+    vlog.error("unable to setsockopt TCP_NODELAY: %d", e);
+    return false;
+  }
+  return true;
+}
+
+bool TcpSocket::isSocket(int sock)
+{
+  struct sockaddr_in info;
+  VNC_SOCKLEN_T info_size = sizeof(info);
+  return getsockname(sock, (struct sockaddr *)&info, &info_size) >= 0;
+}
+
+bool TcpSocket::isConnected(int sock)
+{
+  struct sockaddr_in info;
+  VNC_SOCKLEN_T info_size = sizeof(info);
+  return getpeername(sock, (struct sockaddr *)&info, &info_size) >= 0;
+}
+
+int TcpSocket::getSockPort(int sock)
+{
+  struct sockaddr_in info;
+  VNC_SOCKLEN_T info_size = sizeof(info);
+  if (getsockname(sock, (struct sockaddr *)&info, &info_size) < 0)
+    return 0;
+  return ntohs(info.sin_port);
+}
+
+
+TcpListener::TcpListener(int port, bool localhostOnly, int sock, bool close_)
+  : closeFd(close_)
+{
+  if (sock != -1) {
+    fd = sock;
+    return;
+  }
+
+  initSockets();
+  if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+    throw SocketException("unable to create listening socket", errorNumber);
+
+#ifndef WIN32
+  // - By default, close the socket on exec()
+  fcntl(fd, F_SETFD, FD_CLOEXEC);
+
+  int one = 1;
+  if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
+		 (char *)&one, sizeof(one)) < 0) {
+    int e = errorNumber;
+    closesocket(fd);
+    throw SocketException("unable to create listening socket", e);
+  }
+#endif
+
+  // - Bind it to the desired port
+  struct sockaddr_in addr;
+  memset(&addr, 0, sizeof(addr));
+  addr.sin_family = AF_INET;
+  addr.sin_port = htons(port);
+  if (localhostOnly)
+    addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+  else
+    addr.sin_addr.s_addr = htonl(INADDR_ANY);
+  if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+    int e = errorNumber;
+    closesocket(fd);
+    throw SocketException("unable to bind listening socket", e);
+  }
+
+  // - Set it to be a listening socket
+  if (listen(fd, 5) < 0) {
+    int e = errorNumber;
+    closesocket(fd);
+    throw SocketException("unable to set socket to listening mode", e);
+  }
+}
+
+TcpListener::~TcpListener() {
+  if (closeFd) closesocket(fd);
+}
+
+void TcpListener::shutdown()
+{
+#ifdef WIN32
+  closesocket(getFd());
+#else
+  ::shutdown(getFd(), 2);
+#endif
+}
+
+
+Socket*
+TcpListener::accept() {
+  int new_sock = -1;
+
+  // Accept an incoming connection
+  if ((new_sock = ::accept(fd, 0, 0)) < 0)
+    throw SocketException("unable to accept new connection", errorNumber);
+
+#ifndef WIN32
+  // - By default, close the socket on exec()
+  fcntl(new_sock, F_SETFD, FD_CLOEXEC);
+#endif
+
+  // Disable Nagle's algorithm, to reduce latency
+  TcpSocket::enableNagles(new_sock, false);
+
+  // Create the socket object & check connection is allowed
+  TcpSocket* s = new TcpSocket(new_sock);
+  if (filter && !filter->verifyConnection(s)) {
+    delete s;
+    return 0;
+  }
+  return s;
+}
+
+void TcpListener::getMyAddresses(std::list<char*>* result) {
+  const hostent* addrs = gethostbyname(0);
+  if (addrs == 0)
+    throw rdr::SystemException("gethostbyname", errorNumber);
+  if (addrs->h_addrtype != AF_INET)
+    throw rdr::Exception("getMyAddresses: bad family");
+  for (int i=0; addrs->h_addr_list[i] != 0; i++) {
+    const char* addrC = inet_ntoa(*((struct in_addr*)addrs->h_addr_list[i]));
+    char* addr = new char[strlen(addrC)+1];
+    strcpy(addr, addrC);
+    result->push_back(addr);
+  }
+}
+
+int TcpListener::getMyPort() {
+  return TcpSocket::getSockPort(getFd());
+}
+
+
+TcpFilter::TcpFilter(const char* spec) {
+  rfb::CharArray tmp;
+  tmp.buf = rfb::strDup(spec);
+  while (tmp.buf) {
+    rfb::CharArray first;
+    rfb::strSplit(tmp.buf, ',', &first.buf, &tmp.buf);
+    if (strlen(first.buf))
+      filter.push_back(parsePattern(first.buf));
+  }
+}
+
+TcpFilter::~TcpFilter() {
+}
+
+
+static bool
+patternMatchIP(const TcpFilter::Pattern& pattern, const char* value) {
+  unsigned long address = inet_addr((char *)value);
+  if (address == INADDR_NONE) return false;
+  return ((pattern.address & pattern.mask) == (address & pattern.mask));
+}
+
+bool
+TcpFilter::verifyConnection(Socket* s) {
+  rfb::CharArray name;
+
+  name.buf = s->getPeerAddress();
+  std::list<TcpFilter::Pattern>::iterator i;
+  for (i=filter.begin(); i!=filter.end(); i++) {
+    if (patternMatchIP(*i, name.buf)) {
+      switch ((*i).action) {
+      case Accept:
+        vlog.debug("ACCEPT %s", name.buf);
+        return true;
+      case Query:
+        vlog.debug("QUERY %s", name.buf);
+        s->setRequiresQuery();
+        return true;
+      case Reject:
+        vlog.debug("REJECT %s", name.buf);
+        return false;
+      }
+    }
+  }
+
+  vlog.debug("[REJECT] %s", name.buf);
+  return false;
+}
+
+
+TcpFilter::Pattern TcpFilter::parsePattern(const char* p) {
+  TcpFilter::Pattern pattern;
+
+  bool expandMask = false;
+  rfb::CharArray addr, mask;
+
+  if (rfb::strSplit(&p[1], '/', &addr.buf, &mask.buf)) {
+    if (rfb::strContains(mask.buf, '.')) {
+      pattern.mask = inet_addr(mask.buf);
+    } else {
+      pattern.mask = atoi(mask.buf);
+      expandMask = true;
+    }
+  } else {
+    pattern.mask = 32;
+    expandMask = true;
+  }
+  if (expandMask) {
+    unsigned long expanded = 0;
+    // *** check endianness!
+    for (int i=0; i<(int)pattern.mask; i++)
+      expanded |= 1<<(31-i);
+    pattern.mask = htonl(expanded);
+  }
+
+  pattern.address = inet_addr(addr.buf) & pattern.mask;
+  if ((pattern.address == INADDR_NONE) ||
+      (pattern.address == 0)) pattern.mask = 0;
+
+  switch(p[0]) {
+  case '+': pattern.action = TcpFilter::Accept; break;
+  case '-': pattern.action = TcpFilter::Reject; break;
+  case '?': pattern.action = TcpFilter::Query; break;
+  };
+
+  return pattern;
+}
+
+char* TcpFilter::patternToStr(const TcpFilter::Pattern& p) {
+  in_addr tmp;
+  rfb::CharArray addr, mask;
+  tmp.s_addr = p.address;
+  addr.buf = rfb::strDup(inet_ntoa(tmp));
+  tmp.s_addr = p.mask;
+  mask.buf = rfb::strDup(inet_ntoa(tmp));
+  char* result = new char[strlen(addr.buf)+1+strlen(mask.buf)+1+1];
+  switch (p.action) {
+  case Accept: result[0] = '+'; break;
+  case Reject: result[0] = '-'; break;
+  case Query: result[0] = '?'; break;
+  };
+  result[1] = 0;
+  strcat(result, addr.buf);
+  strcat(result, "/");
+  strcat(result, mask.buf);
+  return result;
+}
diff --git a/common/network/TcpSocket.h b/common/network/TcpSocket.h
new file mode 100644
index 00000000..774c6e13
--- /dev/null
+++ b/common/network/TcpSocket.h
@@ -0,0 +1,105 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- TcpSocket.h - base-class for TCP stream sockets.
+//     This header also defines the TcpListener class, used
+//     to listen for incoming socket connections over TCP
+//
+//     NB: Any file descriptors created by the TcpSocket or
+//     TcpListener classes are close-on-exec if the OS supports
+//     it.  TcpSockets initialised with a caller-supplied fd
+//     are NOT set to close-on-exec.
+
+#ifndef __NETWORK_TCP_SOCKET_H__
+#define __NETWORK_TCP_SOCKET_H__
+
+#include <network/Socket.h>
+
+#include <list>
+
+/* Tunnelling support. */
+#define TUNNEL_PORT_OFFSET 5500
+
+namespace network {
+
+  /* Tunnelling support. */
+  int findFreeTcpPort (void);
+
+  class TcpSocket : public Socket {
+  public:
+    TcpSocket(int sock, bool close=true);
+    TcpSocket(const char *name, int port);
+    virtual ~TcpSocket();
+
+    virtual char* getMyAddress();
+    virtual int getMyPort();
+    virtual char* getMyEndpoint();
+
+    virtual char* getPeerAddress();
+    virtual int getPeerPort();
+    virtual char* getPeerEndpoint();
+    virtual bool sameMachine();
+
+    virtual void shutdown();
+
+    static bool enableNagles(int sock, bool enable);
+    static bool isSocket(int sock);
+    static bool isConnected(int sock);
+    static int getSockPort(int sock);
+  private:
+    bool closeFd;
+  };
+
+  class TcpListener : public SocketListener {
+  public:
+    TcpListener(int port, bool localhostOnly=false, int sock=-1,
+                bool close=true);
+    virtual ~TcpListener();
+
+    virtual void shutdown();
+    virtual Socket* accept();
+
+    void getMyAddresses(std::list<char*>* addrs);
+    int getMyPort();
+
+  private:
+    bool closeFd;
+  };
+
+  class TcpFilter : public ConnectionFilter {
+  public:
+    TcpFilter(const char* filter);
+    virtual ~TcpFilter();
+
+    virtual bool verifyConnection(Socket* s);
+
+    typedef enum {Accept, Reject, Query} Action;
+    struct Pattern {
+      Action action;
+      unsigned long address;
+      unsigned long mask;
+    };
+    static Pattern parsePattern(const char* s);
+    static char* patternToStr(const Pattern& p);
+  protected:
+    std::list<Pattern> filter;
+  };
+
+}
+
+#endif // __NETWORK_TCP_SOCKET_H__
diff --git a/common/network/network.dsp b/common/network/network.dsp
new file mode 100644
index 00000000..5e23a179
--- /dev/null
+++ b/common/network/network.dsp
@@ -0,0 +1,129 @@
+# Microsoft Developer Studio Project File - Name="network" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Static Library" 0x0104

+

+CFG=network - Win32 Debug Unicode

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "network.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "network.mak" CFG="network - Win32 Debug Unicode"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "network - Win32 Release" (based on "Win32 (x86) Static Library")

+!MESSAGE "network - Win32 Debug" (based on "Win32 (x86) Static Library")

+!MESSAGE "network - Win32 Debug Unicode" (based on "Win32 (x86) Static Library")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "network - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "..\Release"

+# PROP Intermediate_Dir "..\Release\network"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_MBCS" /D "_LIB" /YX /FD /c

+# ADD CPP /nologo /MT /W3 /GX /O1 /I ".." /FI"rdr/msvcwarning.h" /D "NDEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x809 /d "NDEBUG"

+# ADD RSC /l 0x809 /d "NDEBUG"

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+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ELSEIF  "$(CFG)" == "network - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "..\Debug"

+# PROP Intermediate_Dir "..\Debug\network"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "_LIB" /YX /FD /GZ /c

+# ADD CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /I ".." /FI"rdr/msvcwarning.h" /D "_DEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x809 /d "_DEBUG"

+# ADD RSC /l 0x809 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ELSEIF  "$(CFG)" == "network - Win32 Debug Unicode"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "network___Win32_Debug_Unicode"

+# PROP BASE Intermediate_Dir "network___Win32_Debug_Unicode"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "..\Debug_Unicode"

+# PROP Intermediate_Dir "..\Debug_Unicode\network"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /I ".." /FI"msvcwarning.h" /D "_DEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /I ".." /FI"rdr/msvcwarning.h" /D "_LIB" /D "_DEBUG" /D "WIN32" /D "_UNICODE" /D "UNICODE" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x809 /d "_DEBUG"

+# ADD RSC /l 0x809 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

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+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

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+

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+

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+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# Begin Source File

+

+SOURCE=.\Socket.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\TcpSocket.h

+# End Source File

+# End Group

+# End Target

+# End Project

diff --git a/common/rdr/Exception.cxx b/common/rdr/Exception.cxx
new file mode 100644
index 00000000..7d387119
--- /dev/null
+++ b/common/rdr/Exception.cxx
@@ -0,0 +1,73 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/Exception.h>
+#ifdef _WIN32
+#include <tchar.h>
+#include <winsock2.h>
+#include <windows.h>
+#endif
+
+using namespace rdr;
+
+SystemException::SystemException(const char* s, int err_)
+  : Exception(s), err(err_)
+{
+  strncat(str_, ": ", len-1-strlen(str_));
+#ifdef _WIN32
+  // Windows error messages are crap, so use unix ones for common errors.
+  const char* msg = 0;
+  switch (err) {
+  case WSAECONNREFUSED: msg = "Connection refused";       break;
+  case WSAETIMEDOUT:    msg = "Connection timed out";     break;
+  case WSAECONNRESET:   msg = "Connection reset by peer"; break;
+  case WSAECONNABORTED: msg = "Connection aborted";       break;
+  }
+  if (msg) {
+    strncat(str_, msg, len-1-strlen(str_));
+  } else {
+#ifdef UNICODE
+    WCHAR* tmsg = new WCHAR[len-strlen(str_)];
+    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+                  0, err, 0, tmsg, len-1-strlen(str_), 0);
+    WideCharToMultiByte(CP_ACP, 0, tmsg, wcslen(tmsg)+1,
+		              str_+strlen(str_), len-strlen(str_), 0, 0);
+    delete [] tmsg;
+#else
+    char* currStr = str_+strlen(str_);
+    FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+                  0, err, 0, currStr, len-1-strlen(str_), 0);
+#endif
+    int l = strlen(str_);
+    if ((l >= 2) && (str_[l-2] == '\r') && (str_[l-1] == '\n'))
+      str_[l-2] = 0;
+  }
+
+#else
+  strncat(str_, strerror(err), len-1-strlen(str_));
+#endif
+  strncat(str_, " (", len-1-strlen(str_));
+  char buf[20];
+#ifdef WIN32
+  if (err < 0)
+    sprintf(buf, "%x", err);
+  else
+#endif
+    sprintf(buf,"%d",err);
+  strncat(str_, buf, len-1-strlen(str_));
+  strncat(str_, ")", len-1-strlen(str_));
+}
diff --git a/common/rdr/Exception.h b/common/rdr/Exception.h
new file mode 100644
index 00000000..1b92f777
--- /dev/null
+++ b/common/rdr/Exception.h
@@ -0,0 +1,58 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RDR_EXCEPTION_H__
+#define __RDR_EXCEPTION_H__
+
+#include <stdio.h>
+#include <string.h>
+
+namespace rdr {
+
+  struct Exception {
+    enum { len = 256 };
+    char str_[len];
+    Exception(const char* s=0) {
+      str_[0] = 0;
+      if (s)
+        strncat(str_, s, len-1);
+      else
+        strcat(str_, "Exception");
+    }
+    virtual const char* str() const { return str_; }
+  };
+
+  struct SystemException : public Exception {
+    int err;
+    SystemException(const char* s, int err_);
+  }; 
+
+  struct TimedOut : public Exception {
+    TimedOut(const char* s="Timed out") : Exception(s) {}
+  };
+ 
+  struct EndOfStream : public Exception {
+    EndOfStream(const char* s="End of stream") : Exception(s) {}
+  };
+
+  struct FrameException : public Exception {
+    FrameException(const char* s="Frame exception") : Exception(s) {}
+  };
+}
+
+#endif
diff --git a/common/rdr/FdInStream.cxx b/common/rdr/FdInStream.cxx
new file mode 100644
index 00000000..2b119735
--- /dev/null
+++ b/common/rdr/FdInStream.cxx
@@ -0,0 +1,304 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#ifdef _WIN32
+#include <winsock2.h>
+#ifndef _WIN32_WCE
+#include <sys/timeb.h>
+#endif
+#define read(s,b,l) recv(s,(char*)b,l,0)
+#define close closesocket
+#undef errno
+#define errno WSAGetLastError()
+#undef EINTR
+#define EINTR WSAEINTR
+#else
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/time.h>
+#endif
+
+#ifndef vncmin
+#define vncmin(a,b)            (((a) < (b)) ? (a) : (b))
+#endif
+#ifndef vncmax
+#define vncmax(a,b)            (((a) > (b)) ? (a) : (b))
+#endif
+
+// XXX should use autoconf HAVE_SYS_SELECT_H
+#ifdef _AIX
+#include <sys/select.h>
+#endif
+
+// XXX Lynx/OS 2.3: protos for gettimeofday(), select(), bzero()
+#ifdef Lynx
+#include <sys/proto.h>
+#endif
+
+#include <rdr/FdInStream.h>
+#include <rdr/Exception.h>
+
+using namespace rdr;
+
+enum { DEFAULT_BUF_SIZE = 8192,
+       MIN_BULK_SIZE = 1024 };
+
+FdInStream::FdInStream(int fd_, int timeoutms_, int bufSize_,
+                       bool closeWhenDone_)
+  : fd(fd_), closeWhenDone(closeWhenDone_),
+    timeoutms(timeoutms_), blockCallback(0),
+    timing(false), timeWaitedIn100us(5), timedKbits(0),
+    bufSize(bufSize_ ? bufSize_ : DEFAULT_BUF_SIZE), offset(0)
+{
+  ptr = end = start = new U8[bufSize];
+}
+
+FdInStream::FdInStream(int fd_, FdInStreamBlockCallback* blockCallback_,
+                       int bufSize_)
+  : fd(fd_), timeoutms(0), blockCallback(blockCallback_),
+    timing(false), timeWaitedIn100us(5), timedKbits(0),
+    bufSize(bufSize_ ? bufSize_ : DEFAULT_BUF_SIZE), offset(0)
+{
+  ptr = end = start = new U8[bufSize];
+}
+
+FdInStream::~FdInStream()
+{
+  delete [] start;
+  if (closeWhenDone) close(fd);
+}
+
+
+void FdInStream::setTimeout(int timeoutms_) {
+  timeoutms = timeoutms_;
+}
+
+void FdInStream::setBlockCallback(FdInStreamBlockCallback* blockCallback_)
+{
+  blockCallback = blockCallback_;
+  timeoutms = 0;
+}
+
+int FdInStream::pos()
+{
+  return offset + ptr - start;
+}
+
+void FdInStream::readBytes(void* data, int length)
+{
+  if (length < MIN_BULK_SIZE) {
+    InStream::readBytes(data, length);
+    return;
+  }
+
+  U8* dataPtr = (U8*)data;
+
+  int n = end - ptr;
+  if (n > length) n = length;
+
+  memcpy(dataPtr, ptr, n);
+  dataPtr += n;
+  length -= n;
+  ptr += n;
+
+  while (length > 0) {
+    n = readWithTimeoutOrCallback(dataPtr, length);
+    dataPtr += n;
+    length -= n;
+    offset += n;
+  }
+}
+
+
+int FdInStream::overrun(int itemSize, int nItems, bool wait)
+{
+  if (itemSize > bufSize)
+    throw Exception("FdInStream overrun: max itemSize exceeded");
+
+  if (end - ptr != 0)
+    memmove(start, ptr, end - ptr);
+
+  offset += ptr - start;
+  end -= ptr - start;
+  ptr = start;
+
+  int bytes_to_read;
+  while (end < start + itemSize) {
+    bytes_to_read = start + bufSize - end;
+    if (!timing) {
+      // When not timing, we must be careful not to read too much
+      // extra data into the buffer. Otherwise, the line speed
+      // estimation might stay at zero for a long time: All reads
+      // during timing=1 can be satisfied without calling
+      // readWithTimeoutOrCallback. However, reading only 1 or 2 bytes
+      // bytes is ineffecient.
+      bytes_to_read = vncmin(bytes_to_read, vncmax(itemSize*nItems, 8));
+    }
+    int n = readWithTimeoutOrCallback((U8*)end, bytes_to_read, wait);
+    if (n == 0) return 0;
+    end += n;
+  }
+
+  if (itemSize * nItems > end - ptr)
+    nItems = (end - ptr) / itemSize;
+
+  return nItems;
+}
+
+#ifdef _WIN32
+static void gettimeofday(struct timeval* tv, void*)
+{
+  LARGE_INTEGER counts, countsPerSec;
+  static double usecPerCount = 0.0;
+
+  if (QueryPerformanceCounter(&counts)) {
+    if (usecPerCount == 0.0) {
+      QueryPerformanceFrequency(&countsPerSec);
+      usecPerCount = 1000000.0 / countsPerSec.QuadPart;
+    }
+
+    LONGLONG usecs = (LONGLONG)(counts.QuadPart * usecPerCount);
+    tv->tv_usec = (long)(usecs % 1000000);
+    tv->tv_sec = (long)(usecs / 1000000);
+
+  } else {
+#ifndef _WIN32_WCE
+    struct timeb tb;
+    ftime(&tb);
+    tv->tv_sec = tb.time;
+    tv->tv_usec = tb.millitm * 1000;
+#else
+    throw SystemException("QueryPerformanceCounter", GetLastError());
+#endif
+  }
+}
+#endif
+
+//
+// readWithTimeoutOrCallback() reads up to the given length in bytes from the
+// file descriptor into a buffer.  If the wait argument is false, then zero is
+// returned if no bytes can be read without blocking.  Otherwise if a
+// blockCallback is set, it will be called (repeatedly) instead of blocking.
+// If alternatively there is a timeout set and that timeout expires, it throws
+// a TimedOut exception.  Otherwise it returns the number of bytes read.  It
+// never attempts to read() unless select() indicates that the fd is readable -
+// this means it can be used on an fd which has been set non-blocking.  It also
+// has to cope with the annoying possibility of both select() and read()
+// returning EINTR.
+//
+
+int FdInStream::readWithTimeoutOrCallback(void* buf, int len, bool wait)
+{
+  struct timeval before, after;
+  if (timing)
+    gettimeofday(&before, 0);
+
+  int n;
+  while (true) {
+    do {
+      fd_set fds;
+      struct timeval tv;
+      struct timeval* tvp = &tv;
+
+      if (!wait) {
+        tv.tv_sec = tv.tv_usec = 0;
+      } else if (timeoutms != -1) {
+        tv.tv_sec = timeoutms / 1000;
+        tv.tv_usec = (timeoutms % 1000) * 1000;
+      } else {
+        tvp = 0;
+      }
+
+      FD_ZERO(&fds);
+      FD_SET(fd, &fds);
+      n = select(fd+1, &fds, 0, 0, tvp);
+    } while (n < 0 && errno == EINTR);
+
+    if (n > 0) break;
+    if (n < 0) throw SystemException("select",errno);
+    if (!wait) return 0;
+    if (!blockCallback) throw TimedOut();
+
+    blockCallback->blockCallback();
+  }
+
+  do {
+    n = ::read(fd, buf, len);
+  } while (n < 0 && errno == EINTR);
+
+  if (n < 0) throw SystemException("read",errno);
+  if (n == 0) throw EndOfStream();
+
+  if (timing) {
+    gettimeofday(&after, 0);
+//      fprintf(stderr,"%d.%06d\n",(after.tv_sec - before.tv_sec),
+//              (after.tv_usec - before.tv_usec));
+    int newTimeWaited = ((after.tv_sec - before.tv_sec) * 10000 +
+                         (after.tv_usec - before.tv_usec) / 100);
+    int newKbits = n * 8 / 1000;
+
+//      if (newTimeWaited == 0) {
+//        fprintf(stderr,"new kbps infinite t %d k %d\n",
+//                newTimeWaited, newKbits);
+//      } else {
+//        fprintf(stderr,"new kbps %d t %d k %d\n",
+//                newKbits * 10000 / newTimeWaited, newTimeWaited, newKbits);
+//      }
+
+    // limit rate to between 10kbit/s and 40Mbit/s
+
+    if (newTimeWaited > newKbits*1000) newTimeWaited = newKbits*1000;
+    if (newTimeWaited < newKbits/4)    newTimeWaited = newKbits/4;
+
+    timeWaitedIn100us += newTimeWaited;
+    timedKbits += newKbits;
+  }
+
+  return n;
+}
+
+void FdInStream::startTiming()
+{
+  timing = true;
+
+  // Carry over up to 1s worth of previous rate for smoothing.
+
+  if (timeWaitedIn100us > 10000) {
+    timedKbits = timedKbits * 10000 / timeWaitedIn100us;
+    timeWaitedIn100us = 10000;
+  }
+}
+
+void FdInStream::stopTiming()
+{
+  timing = false; 
+  if (timeWaitedIn100us < timedKbits/2)
+    timeWaitedIn100us = timedKbits/2; // upper limit 20Mbit/s
+}
+
+unsigned int FdInStream::kbitsPerSecond()
+{
+  // The following calculation will overflow 32-bit arithmetic if we have
+  // received more than about 50Mbytes (400Mbits) since we started timing, so
+  // it should be OK for a single RFB update.
+
+  return timedKbits * 10000 / timeWaitedIn100us;
+}
diff --git a/common/rdr/FdInStream.h b/common/rdr/FdInStream.h
new file mode 100644
index 00000000..5d9598c8
--- /dev/null
+++ b/common/rdr/FdInStream.h
@@ -0,0 +1,77 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// FdInStream streams from a file descriptor.
+//
+
+#ifndef __RDR_FDINSTREAM_H__
+#define __RDR_FDINSTREAM_H__
+
+#include <rdr/InStream.h>
+
+namespace rdr {
+
+  class FdInStreamBlockCallback {
+  public:
+    virtual void blockCallback() = 0;
+  };
+
+  class FdInStream : public InStream {
+
+  public:
+
+    FdInStream(int fd, int timeoutms=-1, int bufSize=0,
+               bool closeWhenDone_=false);
+    FdInStream(int fd, FdInStreamBlockCallback* blockCallback, int bufSize=0);
+    virtual ~FdInStream();
+
+    void setTimeout(int timeoutms);
+    void setBlockCallback(FdInStreamBlockCallback* blockCallback);
+    int getFd() { return fd; }
+    int pos();
+    void readBytes(void* data, int length);
+
+    void startTiming();
+    void stopTiming();
+    unsigned int kbitsPerSecond();
+    unsigned int timeWaited() { return timeWaitedIn100us; }
+
+  protected:
+    int overrun(int itemSize, int nItems, bool wait);
+
+  private:
+    int readWithTimeoutOrCallback(void* buf, int len, bool wait=true);
+
+    int fd;
+    bool closeWhenDone;
+    int timeoutms;
+    FdInStreamBlockCallback* blockCallback;
+
+    bool timing;
+    unsigned int timeWaitedIn100us;
+    unsigned int timedKbits;
+
+    int bufSize;
+    int offset;
+    U8* start;
+  };
+
+} // end of namespace rdr
+
+#endif
diff --git a/common/rdr/FdOutStream.cxx b/common/rdr/FdOutStream.cxx
new file mode 100644
index 00000000..07ac04c2
--- /dev/null
+++ b/common/rdr/FdOutStream.cxx
@@ -0,0 +1,159 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#ifdef _WIN32
+#include <winsock2.h>
+#define write(s,b,l) send(s,(const char*)b,l,0)
+#define EWOULDBLOCK WSAEWOULDBLOCK
+#undef errno
+#define errno WSAGetLastError()
+#undef EINTR
+#define EINTR WSAEINTR
+#else
+#include <sys/types.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/time.h>
+#endif
+
+// XXX Lynx/OS 2.3: protos for select(), bzero()
+#ifdef Lynx
+#include <sys/proto.h>
+#endif
+
+#include <rdr/FdOutStream.h>
+#include <rdr/Exception.h>
+
+
+using namespace rdr;
+
+enum { DEFAULT_BUF_SIZE = 16384 };
+
+FdOutStream::FdOutStream(int fd_, int timeoutms_, int bufSize_)
+  : fd(fd_), timeoutms(timeoutms_),
+    bufSize(bufSize_ ? bufSize_ : DEFAULT_BUF_SIZE), offset(0)
+{
+  ptr = start = new U8[bufSize];
+  end = start + bufSize;
+}
+
+FdOutStream::~FdOutStream()
+{
+  try {
+    flush();
+  } catch (Exception&) {
+  }
+  delete [] start;
+}
+
+void FdOutStream::setTimeout(int timeoutms_) {
+  timeoutms = timeoutms_;
+}
+
+int FdOutStream::length()
+{
+  return offset + ptr - start;
+}
+
+void FdOutStream::flush()
+{
+  U8* sentUpTo = start;
+  while (sentUpTo < ptr) {
+    int n = writeWithTimeout((const void*) sentUpTo, ptr - sentUpTo);
+    sentUpTo += n;
+    offset += n;
+  }
+
+  ptr = start;
+}
+
+
+int FdOutStream::overrun(int itemSize, int nItems)
+{
+  if (itemSize > bufSize)
+    throw Exception("FdOutStream overrun: max itemSize exceeded");
+
+  flush();
+
+  if (itemSize * nItems > end - ptr)
+    nItems = (end - ptr) / itemSize;
+
+  return nItems;
+}
+
+//
+// writeWithTimeout() writes up to the given length in bytes from the given
+// buffer to the file descriptor.  If there is a timeout set and that timeout
+// expires, it throws a TimedOut exception.  Otherwise it returns the number of
+// bytes written.  It never attempts to write() unless select() indicates that
+// the fd is writable - this means it can be used on an fd which has been set
+// non-blocking.  It also has to cope with the annoying possibility of both
+// select() and write() returning EINTR.
+//
+
+int FdOutStream::writeWithTimeout(const void* data, int length)
+{
+  int n;
+
+  do {
+
+    do {
+      fd_set fds;
+      struct timeval tv;
+      struct timeval* tvp = &tv;
+
+      if (timeoutms != -1) {
+        tv.tv_sec = timeoutms / 1000;
+        tv.tv_usec = (timeoutms % 1000) * 1000;
+      } else {
+        tvp = 0;
+      }
+
+      FD_ZERO(&fds);
+      FD_SET(fd, &fds);
+#ifdef _WIN32_WCE
+      // NB: This fixes a broken Winsock2 select() behaviour.  select()
+      // never returns for non-blocking sockets, unless they're already
+      // ready to be written to...
+      u_long zero = 0; ioctlsocket(fd, FIONBIO, &zero);
+#endif
+      n = select(fd+1, 0, &fds, 0, tvp);
+#ifdef _WIN32_WCE
+      u_long one = 0; ioctlsocket(fd, FIONBIO, &one);
+#endif
+    } while (n < 0 && errno == EINTR);
+
+    if (n < 0) throw SystemException("select",errno);
+
+    if (n == 0) throw TimedOut();
+
+    do {
+      n = ::write(fd, data, length);
+    } while (n < 0 && (errno == EINTR));
+      
+    // NB: This outer loop simply fixes a broken Winsock2 EWOULDBLOCK
+    // condition, found only under Win98 (first edition), with slow
+    // network connections.  Should in fact never ever happen...
+  } while (n < 0 && (errno == EWOULDBLOCK));
+
+  if (n < 0) throw SystemException("write",errno);
+
+  return n;
+}
diff --git a/common/rdr/FdOutStream.h b/common/rdr/FdOutStream.h
new file mode 100644
index 00000000..a3e29127
--- /dev/null
+++ b/common/rdr/FdOutStream.h
@@ -0,0 +1,55 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// FdOutStream streams to a file descriptor.
+//
+
+#ifndef __RDR_FDOUTSTREAM_H__
+#define __RDR_FDOUTSTREAM_H__
+
+#include <rdr/OutStream.h>
+
+namespace rdr {
+
+  class FdOutStream : public OutStream {
+
+  public:
+
+    FdOutStream(int fd, int timeoutms=-1, int bufSize=0);
+    virtual ~FdOutStream();
+
+    void setTimeout(int timeoutms);
+    int getFd() { return fd; }
+
+    void flush();
+    int length();
+
+  private:
+    int overrun(int itemSize, int nItems);
+    int writeWithTimeout(const void* data, int length);
+    int fd;
+    int timeoutms;
+    int bufSize;
+    int offset;
+    U8* start;
+  };
+
+}
+
+#endif
diff --git a/common/rdr/FixedMemOutStream.h b/common/rdr/FixedMemOutStream.h
new file mode 100644
index 00000000..e4ec52cb
--- /dev/null
+++ b/common/rdr/FixedMemOutStream.h
@@ -0,0 +1,52 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// A FixedMemOutStream writes to a buffer of a fixed length.
+//
+
+#ifndef __RDR_FIXEDMEMOUTSTREAM_H__
+#define __RDR_FIXEDMEMOUTSTREAM_H__
+
+#include <rdr/OutStream.h>
+#include <rdr/Exception.h>
+
+namespace rdr {
+
+  class FixedMemOutStream : public OutStream {
+
+  public:
+
+    FixedMemOutStream(void* buf, int len) {
+      ptr = start = (U8*)buf;
+      end = start + len;
+    }
+
+    int length() { return ptr - start; }
+    void reposition(int pos) { ptr = start + pos; }
+    const void* data() { return (const void*)start; }
+
+  private:
+
+    int overrun(int itemSize, int nItems) { throw EndOfStream(); }
+    U8* start;
+  };
+
+}
+
+#endif
diff --git a/common/rdr/HexInStream.cxx b/common/rdr/HexInStream.cxx
new file mode 100644
index 00000000..80f8a796
--- /dev/null
+++ b/common/rdr/HexInStream.cxx
@@ -0,0 +1,117 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <rdr/HexInStream.h>
+#include <rdr/Exception.h>
+
+#include <stdlib.h>
+#include <ctype.h>
+
+using namespace rdr;
+
+const int DEFAULT_BUF_LEN = 16384;
+
+static inline int min(int a, int b) {return a<b ? a : b;}
+
+HexInStream::HexInStream(InStream& is, int bufSize_)
+: bufSize(bufSize_ ? bufSize_ : DEFAULT_BUF_LEN), offset(0), in_stream(is)
+{
+  ptr = end = start = new U8[bufSize];
+}
+
+HexInStream::~HexInStream() {
+  delete [] start;
+}
+
+
+bool HexInStream::readHexAndShift(char c, int* v) {
+  c=tolower(c);
+  if ((c >= '0') && (c <= '9'))
+    *v = (*v << 4) + (c - '0');
+  else if ((c >= 'a') && (c <= 'f'))
+    *v = (*v << 4) + (c - 'a' + 10);
+  else
+    return false;
+  return true;
+}
+
+bool HexInStream::hexStrToBin(const char* s, char** data, int* length) {
+  int l=strlen(s);
+  if ((l % 2) == 0) {
+    delete [] *data;
+    *data = 0; *length = 0;
+    if (l == 0)
+      return true;
+    *data = new char[l/2];
+    *length = l/2;
+    for(int i=0;i<l;i+=2) {
+      int byte = 0;
+      if (!readHexAndShift(s[i], &byte) ||
+        !readHexAndShift(s[i+1], &byte))
+        goto decodeError;
+      (*data)[i/2] = byte;
+    }
+    return true;
+  }
+decodeError:
+  delete [] *data;
+  *data = 0;
+  *length = 0;
+  return false;
+}
+
+
+int HexInStream::pos() {
+  return offset + ptr - start;
+}
+
+int HexInStream::overrun(int itemSize, int nItems, bool wait) {
+  if (itemSize > bufSize)
+    throw Exception("HexInStream overrun: max itemSize exceeded");
+
+  if (end - ptr != 0)
+    memmove(start, ptr, end - ptr);
+
+  end -= ptr - start;
+  offset += ptr - start;
+  ptr = start;
+
+  while (end < ptr + itemSize) {
+    int n = in_stream.check(2, 1, wait);
+    if (n == 0) return 0;
+    const U8* iptr = in_stream.getptr();
+    const U8* eptr = in_stream.getend();
+    int length = min((eptr - iptr)/2, start + bufSize - end);
+
+    U8* optr = (U8*) end;
+    for (int i=0; i<length; i++) {
+      int v = 0;
+      readHexAndShift(iptr[i*2], &v);
+      readHexAndShift(iptr[i*2+1], &v);
+      optr[i] = v;
+    }
+
+    in_stream.setptr(iptr + length*2);
+    end += length;
+  }
+
+  if (itemSize * nItems > end - ptr)
+    nItems = (end - ptr) / itemSize;
+
+  return nItems;
+}
diff --git a/common/rdr/HexInStream.h b/common/rdr/HexInStream.h
new file mode 100644
index 00000000..6bfb8433
--- /dev/null
+++ b/common/rdr/HexInStream.h
@@ -0,0 +1,50 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RDR_HEX_INSTREAM_H__
+#define __RDR_HEX_INSTREAM_H__
+
+#include <rdr/InStream.h>
+
+namespace rdr {
+
+  class HexInStream : public InStream {
+  public:
+
+    HexInStream(InStream& is, int bufSize=0);
+    virtual ~HexInStream();
+
+    int pos();
+
+    static bool readHexAndShift(char c, int* v);
+    static bool hexStrToBin(const char* s, char** data, int* length);
+
+  protected:
+    int overrun(int itemSize, int nItems, bool wait);
+
+  private:
+    int bufSize;
+    U8* start;
+    int offset;
+
+    InStream& in_stream;
+  };
+
+} // end of namespace rdr
+
+#endif
diff --git a/common/rdr/HexOutStream.cxx b/common/rdr/HexOutStream.cxx
new file mode 100644
index 00000000..9b0b6c4d
--- /dev/null
+++ b/common/rdr/HexOutStream.cxx
@@ -0,0 +1,110 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <rdr/HexOutStream.h>
+#include <rdr/Exception.h>
+
+using namespace rdr;
+
+const int DEFAULT_BUF_LEN = 16384;
+
+static inline int min(int a, int b) {return a<b ? a : b;}
+
+HexOutStream::HexOutStream(OutStream& os, int buflen)
+: out_stream(os), offset(0), bufSize(buflen ? buflen : DEFAULT_BUF_LEN)
+{
+  if (bufSize % 2)
+    bufSize--;
+  ptr = start = new U8[bufSize];
+  end = start + bufSize;
+}
+
+HexOutStream::~HexOutStream() {
+  delete [] start;
+}
+
+
+char HexOutStream::intToHex(int i) {
+  if ((i>=0) && (i<=9))
+    return '0'+i;
+  else if ((i>=10) && (i<=15))
+    return 'a'+(i-10);
+  else
+    throw rdr::Exception("intToHex failed");
+}
+
+char* HexOutStream::binToHexStr(const char* data, int length) {
+  char* buffer = new char[length*2+1];
+  for (int i=0; i<length; i++) {
+    buffer[i*2] = intToHex((data[i] >> 4) & 15);
+    buffer[i*2+1] = intToHex((data[i] & 15));
+    if (!buffer[i*2] || !buffer[i*2+1]) {
+      delete [] buffer;
+      return 0;
+    }
+  }
+  buffer[length*2] = 0;
+  return buffer;
+}
+
+
+void
+HexOutStream::writeBuffer() {
+  U8* pos = start;
+  while (pos != ptr) {
+    out_stream.check(2);
+    U8* optr = out_stream.getptr();
+    U8* oend = out_stream.getend();
+    int length = min(ptr-pos, (oend-optr)/2);
+
+    for (int i=0; i<length; i++) {
+      optr[i*2] = intToHex((pos[i] >> 4) & 0xf);
+      optr[i*2+1] = intToHex(pos[i] & 0xf);
+    }
+
+    out_stream.setptr(optr + length*2);
+    pos += length;
+  }
+  offset += ptr - start;
+  ptr = start;
+}
+
+int HexOutStream::length()
+{
+  return offset + ptr - start;
+}
+
+void
+HexOutStream::flush() {
+  writeBuffer();
+  out_stream.flush();
+}
+
+int
+HexOutStream::overrun(int itemSize, int nItems) {
+  if (itemSize > bufSize)
+    throw Exception("HexOutStream overrun: max itemSize exceeded");
+
+  writeBuffer();
+
+  if (itemSize * nItems > end - ptr)
+    nItems = (end - ptr) / itemSize;
+
+  return nItems;
+}
+
diff --git a/common/rdr/HexOutStream.h b/common/rdr/HexOutStream.h
new file mode 100644
index 00000000..10247e68
--- /dev/null
+++ b/common/rdr/HexOutStream.h
@@ -0,0 +1,51 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RDR_HEX_OUTSTREAM_H__
+#define __RDR_HEX_OUTSTREAM_H__
+
+#include <rdr/OutStream.h>
+
+namespace rdr {
+
+  class HexOutStream : public OutStream {
+  public:
+
+    HexOutStream(OutStream& os, int buflen=0);
+    virtual ~HexOutStream();
+
+    void flush();
+    int length();
+
+    static char intToHex(int i);
+    static char* binToHexStr(const char* data, int length);
+
+  private:
+    void writeBuffer();
+    int overrun(int itemSize, int nItems);
+
+    OutStream& out_stream;
+
+    U8* start;
+    int offset;
+    int bufSize;
+  };
+
+}
+
+#endif
diff --git a/common/rdr/InStream.cxx b/common/rdr/InStream.cxx
new file mode 100644
index 00000000..a413b6c1
--- /dev/null
+++ b/common/rdr/InStream.cxx
@@ -0,0 +1,35 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <rdr/InStream.h>
+#include <rdr/Exception.h>
+
+using namespace rdr;
+
+U32 InStream::maxStringLength = 65535;
+
+char* InStream::readString()
+{
+  U32 len = readU32();
+  if (len > maxStringLength)
+    throw Exception("InStream max string length exceeded");
+  char* str = new char[len+1];
+  readBytes(str, len);
+  str[len] = 0;
+  return str;
+}
diff --git a/common/rdr/InStream.h b/common/rdr/InStream.h
new file mode 100644
index 00000000..6d22ac6a
--- /dev/null
+++ b/common/rdr/InStream.h
@@ -0,0 +1,170 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// rdr::InStream marshalls data from a buffer stored in RDR (RFB Data
+// Representation).
+//
+
+#ifndef __RDR_INSTREAM_H__
+#define __RDR_INSTREAM_H__
+
+#include <rdr/types.h>
+#include <string.h> // for memcpy
+
+namespace rdr {
+
+  class InStream {
+
+  public:
+
+    virtual ~InStream() {}
+
+    // check() ensures there is buffer data for at least one item of size
+    // itemSize bytes.  Returns the number of items in the buffer (up to a
+    // maximum of nItems).  If wait is false, then instead of blocking to wait
+    // for the bytes, zero is returned if the bytes are not immediately
+    // available.
+
+    inline int check(int itemSize, int nItems=1, bool wait=true)
+    {
+      if (ptr + itemSize * nItems > end) {
+        if (ptr + itemSize > end)
+          return overrun(itemSize, nItems, wait);
+
+        nItems = (end - ptr) / itemSize;
+      }
+      return nItems;
+    }
+
+    // checkNoWait() tries to make sure that the given number of bytes can
+    // be read without blocking.  It returns true if this is the case, false
+    // otherwise.  The length must be "small" (less than the buffer size).
+
+    inline bool checkNoWait(int length) { return check(length, 1, false)!=0; }
+
+    // readU/SN() methods read unsigned and signed N-bit integers.
+
+    inline U8  readU8()  { check(1); return *ptr++; }
+    inline U16 readU16() { check(2); int b0 = *ptr++; int b1 = *ptr++;
+                           return b0 << 8 | b1; }
+    inline U32 readU32() { check(4); int b0 = *ptr++; int b1 = *ptr++;
+                                     int b2 = *ptr++; int b3 = *ptr++;
+                           return b0 << 24 | b1 << 16 | b2 << 8 | b3; }
+
+    inline S8  readS8()  { return (S8) readU8();  }
+    inline S16 readS16() { return (S16)readU16(); }
+    inline S32 readS32() { return (S32)readU32(); }
+
+    // readCompactLength() reads 1..3 bytes representing length of the data
+    // following.  This method is used by the Tight decoder.
+
+    inline unsigned int readCompactLength() {
+      U8 b = readU8();
+      int result = (int)b & 0x7F;
+      if (b & 0x80) {
+        b = readU8();
+        result |= ((int)b & 0x7F) << 7;
+        if (b & 0x80) {
+          b = readU8();
+          result |= ((int)b & 0xFF) << 14;
+        }
+      }
+      return result;
+    }
+
+    // readString() reads a string - a U32 length followed by the data.
+    // Returns a null-terminated string - the caller should delete[] it
+    // afterwards.
+
+    char* readString();
+
+    // maxStringLength protects against allocating a huge buffer.  Set it
+    // higher if you need longer strings.
+
+    static U32 maxStringLength;
+
+    inline void skip(int bytes) {
+      while (bytes > 0) {
+        int n = check(1, bytes);
+        ptr += n;
+        bytes -= n;
+      }
+    }
+
+    // readBytes() reads an exact number of bytes.
+
+    virtual void readBytes(void* data, int length) {
+      U8* dataPtr = (U8*)data;
+      U8* dataEnd = dataPtr + length;
+      while (dataPtr < dataEnd) {
+        int n = check(1, dataEnd - dataPtr);
+        memcpy(dataPtr, ptr, n);
+        ptr += n;
+        dataPtr += n;
+      }
+    }
+
+    // readOpaqueN() reads a quantity without byte-swapping.
+
+    inline U8  readOpaque8()  { return readU8(); }
+    inline U16 readOpaque16() { check(2); U16 r; ((U8*)&r)[0] = *ptr++;
+                                ((U8*)&r)[1] = *ptr++; return r; }
+    inline U32 readOpaque32() { check(4); U32 r; ((U8*)&r)[0] = *ptr++;
+                                ((U8*)&r)[1] = *ptr++; ((U8*)&r)[2] = *ptr++;
+                                ((U8*)&r)[3] = *ptr++; return r; }
+    inline U32 readOpaque24A() { check(3); U32 r=0; ((U8*)&r)[0] = *ptr++;
+                                 ((U8*)&r)[1] = *ptr++; ((U8*)&r)[2] = *ptr++;
+                                 return r; }
+    inline U32 readOpaque24B() { check(3); U32 r=0; ((U8*)&r)[1] = *ptr++;
+                                 ((U8*)&r)[2] = *ptr++; ((U8*)&r)[3] = *ptr++;
+                                 return r; }
+
+    // pos() returns the position in the stream.
+
+    virtual int pos() = 0;
+
+    // getptr(), getend() and setptr() are "dirty" methods which allow you to
+    // manipulate the buffer directly.  This is useful for a stream which is a
+    // wrapper around an underlying stream.
+
+    inline const U8* getptr() const { return ptr; }
+    inline const U8* getend() const { return end; }
+    inline void setptr(const U8* p) { ptr = p; }
+
+  private:
+
+    // overrun() is implemented by a derived class to cope with buffer overrun.
+    // It ensures there are at least itemSize bytes of buffer data.  Returns
+    // the number of items in the buffer (up to a maximum of nItems).  itemSize
+    // is supposed to be "small" (a few bytes).  If wait is false, then
+    // instead of blocking to wait for the bytes, zero is returned if the bytes
+    // are not immediately available.
+
+    virtual int overrun(int itemSize, int nItems, bool wait=true) = 0;
+
+  protected:
+
+    InStream() {}
+    const U8* ptr;
+    const U8* end;
+  };
+
+}
+
+#endif
diff --git a/common/rdr/Makefile.in b/common/rdr/Makefile.in
new file mode 100644
index 00000000..09fa5544
--- /dev/null
+++ b/common/rdr/Makefile.in
@@ -0,0 +1,19 @@
+
+SRCS = Exception.cxx FdInStream.cxx FdOutStream.cxx InStream.cxx \
+       RandomStream.cxx ZlibInStream.cxx ZlibOutStream.cxx \
+       HexInStream.cxx HexOutStream.cxx
+
+OBJS = $(SRCS:.cxx=.o)
+
+DIR_CPPFLAGS = -I$(top_srcdir) @ZLIB_INCLUDE@
+
+library = librdr.a
+
+all:: $(library)
+
+$(library): $(OBJS)
+	rm -f $(library)
+	$(AR) $(library) $(OBJS)
+	$(RANLIB) $(library)
+
+# followed by boilerplate.mk
diff --git a/common/rdr/MemInStream.h b/common/rdr/MemInStream.h
new file mode 100644
index 00000000..77ca3f3a
--- /dev/null
+++ b/common/rdr/MemInStream.h
@@ -0,0 +1,63 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// rdr::MemInStream is an InStream which streams from a given memory buffer.
+// If the deleteWhenDone parameter is true then the buffer will be delete[]d in
+// the destructor.  Note that it is delete[]d as a U8* - strictly speaking this
+// means it ought to be new[]ed as a U8* as well, but on most platforms this
+// doesn't matter.
+//
+
+#ifndef __RDR_MEMINSTREAM_H__
+#define __RDR_MEMINSTREAM_H__
+
+#include <rdr/InStream.h>
+#include <rdr/Exception.h>
+
+namespace rdr {
+
+  class MemInStream : public InStream {
+
+  public:
+
+    MemInStream(const void* data, int len, bool deleteWhenDone_=false)
+      : start((const U8*)data), deleteWhenDone(deleteWhenDone_)
+    {
+      ptr = start;
+      end = start + len;
+    }
+
+    virtual ~MemInStream() {
+      if (deleteWhenDone)
+        delete [] (U8*)start;
+    }
+
+    int pos() { return ptr - start; }
+    void reposition(int pos) { ptr = start + pos; }
+
+  private:
+
+    int overrun(int itemSize, int nItems, bool wait) { throw EndOfStream(); }
+    const U8* start;
+    bool deleteWhenDone;
+  };
+
+}
+
+#endif
diff --git a/common/rdr/MemOutStream.h b/common/rdr/MemOutStream.h
new file mode 100644
index 00000000..ee3e9500
--- /dev/null
+++ b/common/rdr/MemOutStream.h
@@ -0,0 +1,83 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// A MemOutStream grows as needed when data is written to it.
+//
+
+#ifndef __RDR_MEMOUTSTREAM_H__
+#define __RDR_MEMOUTSTREAM_H__
+
+#include <rdr/OutStream.h>
+
+namespace rdr {
+
+  class MemOutStream : public OutStream {
+
+  public:
+
+    MemOutStream(int len=1024) {
+      start = ptr = new U8[len];
+      end = start + len;
+    }
+
+    virtual ~MemOutStream() {
+      delete [] start;
+    }
+
+    void writeBytes(const void* data, int length) {
+      check(length);
+      memcpy(ptr, data, length);
+      ptr += length;
+    }
+
+    int length() { return ptr - start; }
+    void clear() { ptr = start; };
+    void clearAndZero() { memset(start, 0, ptr-start); clear(); }
+    void reposition(int pos) { ptr = start + pos; }
+
+    // data() returns a pointer to the buffer.
+
+    const void* data() { return (const void*)start; }
+
+  private:
+
+    // overrun() either doubles the buffer or adds enough space for nItems of
+    // size itemSize bytes.
+
+    int overrun(int itemSize, int nItems) {
+      int len = ptr - start + itemSize * nItems;
+      if (len < (end - start) * 2)
+        len = (end - start) * 2;
+
+      U8* newStart = new U8[len];
+      memcpy(newStart, start, ptr - start);
+      ptr = newStart + (ptr - start);
+      delete [] start;
+      start = newStart;
+      end = newStart + len;
+
+      return nItems;
+    }
+
+    U8* start;
+  };
+
+}
+
+#endif
diff --git a/common/rdr/OutStream.h b/common/rdr/OutStream.h
new file mode 100644
index 00000000..aed2eea1
--- /dev/null
+++ b/common/rdr/OutStream.h
@@ -0,0 +1,171 @@
+/* Copyright (C) 2002-2003 RealVNC Ltd.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// rdr::OutStream marshalls data into a buffer stored in RDR (RFB Data
+// Representation).
+//
+
+#ifndef __RDR_OUTSTREAM_H__
+#define __RDR_OUTSTREAM_H__
+
+#include <rdr/types.h>
+#include <string.h> // for memcpy
+
+namespace rdr {
+
+  class OutStream {
+
+  protected:
+
+    OutStream() {}
+
+  public:
+
+    virtual ~OutStream() {}
+
+    // check() ensures there is buffer space for at least one item of size
+    // itemSize bytes.  Returns the number of items which fit (up to a maximum
+    // of nItems).
+
+    inline int check(int itemSize, int nItems=1)
+    {
+      if (ptr + itemSize * nItems > end) {
+        if (ptr + itemSize > end)
+          return overrun(itemSize, nItems);
+
+        nItems = (end - ptr) / itemSize;
+      }
+      return nItems;
+    }
+
+    // writeU/SN() methods write unsigned and signed N-bit integers.
+
+    inline void writeU8( U8  u) { check(1); *ptr++ = u; }
+    inline void writeU16(U16 u) { check(2); *ptr++ = u >> 8; *ptr++ = (U8)u; }
+    inline void writeU32(U32 u) { check(4); *ptr++ = u >> 24; *ptr++ = u >> 16;
+                                            *ptr++ = u >> 8; *ptr++ = u; }
+
+    inline void writeS8( S8  s) { writeU8((U8)s); }
+    inline void writeS16(S16 s) { writeU16((U16)s); }
+    inline void writeS32(S32 s) { writeU32((U32)s); }
+
+    // writeCompactLength() writes 1..3 bytes representing length of the data
+    // following.  This method is used by the Tight encoder.
+
+    inline void writeCompactLength(unsigned int len) {
+      U8 b = len & 0x7F;
+      if (len <= 0x7F) {
+        writeU8(b);
+      } else {
+        writeU8(b | 0x80);
+        b = len >> 7 & 0x7F;
+        if (len <= 0x3FFF) {
+          writeU8(b);
+        } else {
+          writeU8(b | 0x80);
+          writeU8(len >> 14 & 0xFF);
+        }
+      }
+    }
+
+    // writeString() writes a string - a U32 length followed by the data.  The
+    // given string should be null-terminated (but the terminating null is not
+    // written to the stream).
+
+    inline void writeString(const char* str) {
+      U32 len = strlen(str);
+      writeU32(len);
+      writeBytes(str, len);
+    }
+
+    inline void pad(int bytes) {
+      while (bytes-- > 0) writeU8(0);
+    }
+
+    inline void skip(int bytes) {
+      while (bytes > 0) {
+        int n = check(1, bytes);
+        ptr += n;
+        bytes -= n;
+      }
+    }
+
+    // writeBytes() writes an exact number of bytes.
+
+    virtual void writeBytes(const void* data, int length) {
+      const U8* dataPtr = (const U8*)data;
+      const U8* dataEnd = dataPtr + length;
+      while (dataPtr < dataEnd) {
+        int n = check(1, dataEnd - dataPtr);
+        memcpy(ptr, dataPtr, n);
+        ptr += n;
+        dataPtr += n;
+      }
+    }
+
+    // writeOpaqueN() writes a quantity without byte-swapping.
+
+    inline void writeOpaque8( U8  u) { writeU8(u); }
+    inline void writeOpaque16(U16 u) { check(2); *ptr++ = ((U8*)&u)[0];
+                                       *ptr++ = ((U8*)&u)[1]; }
+    inline void writeOpaque32(U32 u) { check(4); *ptr++ = ((U8*)&u)[0];
+                                       *ptr++ = ((U8*)&u)[1];
+                                       *ptr++ = ((U8*)&u)[2];
+                                       *ptr++ = ((U8*)&u)[3]; }
+    inline void writeOpaque24A(U32 u) { check(3); *ptr++ = ((U8*)&u)[0];
+                                        *ptr++ = ((U8*)&u)[1];
+                                        *ptr++ = ((U8*)&u)[2]; }
+    inline void writeOpaque24B(U32 u) { check(3); *ptr++ = ((U8*)&u)[1];
+                                        *ptr++ = ((U8*)&u)[2];
+                                        *ptr++ = ((U8*)&u)[3]; }
+
+    // length() returns the length of the stream.
+
+    virtual int length() = 0;
+
+    // flush() requests that the stream be flushed.
+
+    virtual void flush() {}
+
+    // getptr(), getend() and setptr() are "dirty" methods which allow you to
+    // manipulate the buffer directly.  This is useful for a stream which is a
+    // wrapper around an underlying stream.
+
+    inline U8* getptr() { return ptr; }
+    inline U8* getend() { return end; }
+    inline void setptr(U8* p) { ptr = p; }
+
+  private:
+
+    // overrun() is implemented by a derived class to cope with buffer overrun.
+    // It ensures there are at least itemSize bytes of buffer space.  Returns
+    // the number of items which fit (up to a maximum of nItems).  itemSize is
+    // supposed to be "small" (a few bytes).
+
+    virtual int overrun(int itemSize, int nItems) = 0;
+
+  protected:
+
+    U8* ptr;
+    U8* end;
+  };
+
+}
+
+#endif
diff --git a/common/rdr/RandomStream.cxx b/common/rdr/RandomStream.cxx
new file mode 100644
index 00000000..7056c2cc
--- /dev/null
+++ b/common/rdr/RandomStream.cxx
@@ -0,0 +1,130 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <rdr/RandomStream.h>
+#include <rdr/Exception.h>
+#include <time.h>
+#include <stdlib.h>
+#ifndef WIN32
+#include <unistd.h>
+#include <errno.h>
+#else
+#define getpid() GetCurrentProcessId()
+#ifndef RFB_HAVE_WINCRYPT
+#pragma message("  NOTE: Not building WinCrypt-based RandomStream")
+#endif
+#endif
+
+using namespace rdr;
+
+const int DEFAULT_BUF_LEN = 256;
+
+unsigned int RandomStream::seed;
+
+RandomStream::RandomStream()
+  : offset(0)
+{
+  ptr = end = start = new U8[DEFAULT_BUF_LEN];
+
+#ifdef RFB_HAVE_WINCRYPT
+  provider = 0;
+  if (!CryptAcquireContext(&provider, 0, 0, PROV_RSA_FULL, 0)) {
+    if (GetLastError() == NTE_BAD_KEYSET) {
+      if (!CryptAcquireContext(&provider, 0, 0, PROV_RSA_FULL, CRYPT_NEWKEYSET)) {
+        fprintf(stderr, "RandomStream: unable to create keyset\n");
+        provider = 0;
+      }
+    } else {
+      fprintf(stderr, "RandomStream: unable to acquire context\n");
+      provider = 0;
+    }
+  }
+  if (!provider) {
+#else
+#ifndef WIN32
+  fp = fopen("/dev/urandom", "r");
+  if (!fp)
+    fp = fopen("/dev/random", "r");
+  if (!fp) {
+#else
+  {
+#endif
+#endif
+    fprintf(stderr,"RandomStream: warning: no OS supplied random source - using rand()\n");
+    seed += (unsigned int) time(0) + getpid() + getpid() * 987654 + rand();
+    srand(seed);
+  }
+}
+
+RandomStream::~RandomStream() {
+  delete [] start;
+
+#ifdef RFB_HAVE_WINCRYPT
+  if (provider)
+    CryptReleaseContext(provider, 0);
+#endif
+#ifndef WIN32
+  if (fp) fclose(fp);
+#endif
+}
+
+int RandomStream::pos() {
+  return offset + ptr - start;
+}
+
+int RandomStream::overrun(int itemSize, int nItems, bool wait) {
+  if (itemSize > DEFAULT_BUF_LEN)
+    throw Exception("RandomStream overrun: max itemSize exceeded");
+
+  if (end - ptr != 0)
+    memmove(start, ptr, end - ptr);
+
+  end -= ptr - start;
+  offset += ptr - start;
+  ptr = start;
+
+  int length = start + DEFAULT_BUF_LEN - end;
+
+#ifdef RFB_HAVE_WINCRYPT
+  if (provider) {
+    if (!CryptGenRandom(provider, length, (U8*)end))
+      throw rdr::SystemException("unable to CryptGenRandom", GetLastError());
+    end += length;
+  } else {
+#else
+#ifndef WIN32
+  if (fp) {
+    int n = fread((U8*)end, length, 1, fp);
+    if (n != 1)
+      throw rdr::SystemException("reading /dev/urandom or /dev/random failed",
+                                 errno);
+    end += length;
+  } else {
+#else
+  {
+#endif
+#endif
+    for (int i=0; i<length; i++)
+      *(U8*)end++ = (int) (256.0*rand()/(RAND_MAX+1.0));
+  }
+
+  if (itemSize * nItems > end - ptr)
+    nItems = (end - ptr) / itemSize;
+
+  return nItems;
+}
diff --git a/common/rdr/RandomStream.h b/common/rdr/RandomStream.h
new file mode 100644
index 00000000..c33360d7
--- /dev/null
+++ b/common/rdr/RandomStream.h
@@ -0,0 +1,63 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RDR_RANDOMSTREAM_H__
+#define __RDR_RANDOMSTREAM_H__
+
+#include <stdio.h>
+#include <rdr/InStream.h>
+
+#ifdef WIN32
+#include <windows.h>
+#include <wincrypt.h>
+#ifdef WINCRYPT32API
+#define RFB_HAVE_WINCRYPT
+#endif
+#endif
+
+namespace rdr {
+
+  class RandomStream : public InStream {
+
+  public:
+
+    RandomStream();
+    virtual ~RandomStream();
+
+    int pos();
+
+  protected:
+    int overrun(int itemSize, int nItems, bool wait);
+
+  private:
+    U8* start;
+    int offset;
+
+    static unsigned int seed;
+#ifdef RFB_HAVE_WINCRYPT
+    HCRYPTPROV provider;
+#endif
+#ifndef WIN32
+    FILE* fp;
+#endif
+
+  };
+
+} // end of namespace rdr
+
+#endif
diff --git a/common/rdr/SubstitutingInStream.h b/common/rdr/SubstitutingInStream.h
new file mode 100644
index 00000000..325b01c5
--- /dev/null
+++ b/common/rdr/SubstitutingInStream.h
@@ -0,0 +1,102 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RDR_SUBSTITUTINGINSTREAM_H__
+#define __RDR_SUBSTITUTINGINSTREAM_H__
+
+#include <rdr/InStream.h>
+#include <rdr/Exception.h>
+
+namespace rdr {
+
+  class Substitutor {
+  public:
+    virtual char* substitute(const char* varName) = 0;
+  };
+
+  class SubstitutingInStream : public InStream {
+  public:
+    SubstitutingInStream(InStream* underlying_, Substitutor* s,
+                         int maxVarNameLen_)
+      : underlying(underlying_), dollar(0), substitutor(s), subst(0),
+        maxVarNameLen(maxVarNameLen_)
+    {
+      ptr = end = underlying->getptr();
+      varName = new char[maxVarNameLen+1];
+    }
+    ~SubstitutingInStream() {
+      delete underlying;
+      delete [] varName;
+      delete [] subst;
+    }
+
+    int pos() { return underlying->pos(); }
+
+    virtual int overrun(int itemSize, int nItems, bool wait=true) {
+      if (itemSize != 1)
+        throw new rdr::Exception("SubstitutingInStream: itemSize must be 1");
+
+      if (subst) {
+        delete [] subst;
+        subst = 0;
+      } else {
+        underlying->setptr(ptr);
+      }
+
+      underlying->check(1);
+      ptr = underlying->getptr();
+      end = underlying->getend();
+      dollar = (const U8*)memchr(ptr, '$', end-ptr);
+      if (dollar) {
+        if (dollar == ptr) {
+          try {
+            int i = 0;
+            while (i < maxVarNameLen) {
+              varName[i++] = underlying->readS8();
+              varName[i] = 0;
+              subst = substitutor->substitute(varName);
+              if (subst) {
+                ptr = (U8*)subst;
+                end = (U8*)subst + strlen(subst);
+                break;
+              }
+            }
+          } catch (EndOfStream&) {
+          }
+
+          if (!subst)
+            dollar = (const U8*)memchr(ptr+1, '$', end-ptr-1);
+        }
+        if (!subst && dollar) end = dollar;
+      }
+
+      if (itemSize * nItems > end - ptr)
+        nItems = (end - ptr) / itemSize;
+
+      return nItems;
+    }
+
+    InStream* underlying;
+    const U8* dollar;
+    Substitutor* substitutor;
+    char* varName;
+    char* subst;
+    int maxVarNameLen;
+  };
+}
+#endif
diff --git a/common/rdr/ZlibInStream.cxx b/common/rdr/ZlibInStream.cxx
new file mode 100644
index 00000000..6f3a7d02
--- /dev/null
+++ b/common/rdr/ZlibInStream.cxx
@@ -0,0 +1,125 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <rdr/ZlibInStream.h>
+#include <rdr/Exception.h>
+#include <zlib.h>
+
+using namespace rdr;
+
+enum { DEFAULT_BUF_SIZE = 16384 };
+
+ZlibInStream::ZlibInStream(int bufSize_)
+  : underlying(0), bufSize(bufSize_ ? bufSize_ : DEFAULT_BUF_SIZE), offset(0),
+    bytesIn(0)
+{
+  zs = new z_stream;
+  zs->zalloc    = Z_NULL;
+  zs->zfree     = Z_NULL;
+  zs->opaque    = Z_NULL;
+  zs->next_in   = Z_NULL;
+  zs->avail_in  = 0;
+  if (inflateInit(zs) != Z_OK) {
+    delete zs;
+    throw Exception("ZlibInStream: inflateInit failed");
+  }
+  ptr = end = start = new U8[bufSize];
+}
+
+ZlibInStream::~ZlibInStream()
+{
+  delete [] start;
+  inflateEnd(zs);
+  delete zs;
+}
+
+void ZlibInStream::setUnderlying(InStream* is, int bytesIn_)
+{
+  underlying = is;
+  bytesIn = bytesIn_;
+  ptr = end = start;
+}
+
+int ZlibInStream::pos()
+{
+  return offset + ptr - start;
+}
+
+void ZlibInStream::reset()
+{
+  ptr = end = start;
+  if (!underlying) return;
+
+  while (bytesIn > 0) {
+    decompress(true);
+    end = start; // throw away any data
+  }
+  underlying = 0;
+}
+
+int ZlibInStream::overrun(int itemSize, int nItems, bool wait)
+{
+  if (itemSize > bufSize)
+    throw Exception("ZlibInStream overrun: max itemSize exceeded");
+  if (!underlying)
+    throw Exception("ZlibInStream overrun: no underlying stream");
+
+  if (end - ptr != 0)
+    memmove(start, ptr, end - ptr);
+
+  offset += ptr - start;
+  end -= ptr - start;
+  ptr = start;
+
+  while (end - ptr < itemSize) {
+    if (!decompress(wait))
+      return 0;
+  }
+
+  if (itemSize * nItems > end - ptr)
+    nItems = (end - ptr) / itemSize;
+
+  return nItems;
+}
+
+// decompress() calls the decompressor once.  Note that this won't necessarily
+// generate any output data - it may just consume some input data.  Returns
+// false if wait is false and we would block on the underlying stream.
+
+bool ZlibInStream::decompress(bool wait)
+{
+  zs->next_out = (U8*)end;
+  zs->avail_out = start + bufSize - end;
+
+  int n = underlying->check(1, 1, wait);
+  if (n == 0) return false;
+  zs->next_in = (U8*)underlying->getptr();
+  zs->avail_in = underlying->getend() - underlying->getptr();
+  if ((int)zs->avail_in > bytesIn)
+    zs->avail_in = bytesIn;
+
+  int rc = inflate(zs, Z_SYNC_FLUSH);
+  if (rc != Z_OK) {
+    throw Exception("ZlibInStream: inflate failed");
+  }
+
+  bytesIn -= zs->next_in - underlying->getptr();
+  end = zs->next_out;
+  underlying->setptr(zs->next_in);
+  return true;
+}
diff --git a/common/rdr/ZlibInStream.h b/common/rdr/ZlibInStream.h
new file mode 100644
index 00000000..c26b6d63
--- /dev/null
+++ b/common/rdr/ZlibInStream.h
@@ -0,0 +1,59 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// ZlibInStream streams from a compressed data stream ("underlying"),
+// decompressing with zlib on the fly.
+//
+
+#ifndef __RDR_ZLIBINSTREAM_H__
+#define __RDR_ZLIBINSTREAM_H__
+
+#include <rdr/InStream.h>
+
+struct z_stream_s;
+
+namespace rdr {
+
+  class ZlibInStream : public InStream {
+
+  public:
+
+    ZlibInStream(int bufSize=0);
+    virtual ~ZlibInStream();
+
+    void setUnderlying(InStream* is, int bytesIn);
+    void reset();
+    int pos();
+
+  private:
+
+    int overrun(int itemSize, int nItems, bool wait);
+    bool decompress(bool wait);
+
+    InStream* underlying;
+    int bufSize;
+    int offset;
+    z_stream_s* zs;
+    int bytesIn;
+    U8* start;
+  };
+
+} // end of namespace rdr
+
+#endif
diff --git a/common/rdr/ZlibOutStream.cxx b/common/rdr/ZlibOutStream.cxx
new file mode 100644
index 00000000..df1dbeec
--- /dev/null
+++ b/common/rdr/ZlibOutStream.cxx
@@ -0,0 +1,161 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <rdr/ZlibOutStream.h>
+#include <rdr/Exception.h>
+#include <zlib.h>
+
+using namespace rdr;
+
+enum { DEFAULT_BUF_SIZE = 16384 };
+
+ZlibOutStream::ZlibOutStream(OutStream* os, int bufSize_, int compressLevel)
+  : underlying(os), compressionLevel(compressLevel), newLevel(compressLevel),
+    bufSize(bufSize_ ? bufSize_ : DEFAULT_BUF_SIZE), offset(0)
+{
+  zs = new z_stream;
+  zs->zalloc    = Z_NULL;
+  zs->zfree     = Z_NULL;
+  zs->opaque    = Z_NULL;
+  if (deflateInit(zs, compressLevel) != Z_OK) {
+    delete zs;
+    throw Exception("ZlibOutStream: deflateInit failed");
+  }
+  ptr = start = new U8[bufSize];
+  end = start + bufSize;
+}
+
+ZlibOutStream::~ZlibOutStream()
+{
+  try {
+    flush();
+  } catch (Exception&) {
+  }
+  delete [] start;
+  deflateEnd(zs);
+  delete zs;
+}
+
+void ZlibOutStream::setUnderlying(OutStream* os)
+{
+  underlying = os;
+}
+
+void ZlibOutStream::setCompressionLevel(int level)
+{
+  if (level < -1 || level > 9)
+    level = -1;                 // Z_DEFAULT_COMPRESSION
+
+  newLevel = level;
+}
+
+int ZlibOutStream::length()
+{
+  return offset + ptr - start;
+}
+
+void ZlibOutStream::flush()
+{
+  zs->next_in = start;
+  zs->avail_in = ptr - start;
+
+//    fprintf(stderr,"zos flush: avail_in %d\n",zs->avail_in);
+
+  while (zs->avail_in != 0) {
+
+    do {
+      underlying->check(1);
+      zs->next_out = underlying->getptr();
+      zs->avail_out = underlying->getend() - underlying->getptr();
+
+//        fprintf(stderr,"zos flush: calling deflate, avail_in %d, avail_out %d\n",
+//                zs->avail_in,zs->avail_out);
+      checkCompressionLevel();
+      int rc = deflate(zs, Z_SYNC_FLUSH);
+      if (rc != Z_OK) throw Exception("ZlibOutStream: deflate failed");
+
+//        fprintf(stderr,"zos flush: after deflate: %d bytes\n",
+//                zs->next_out-underlying->getptr());
+
+      underlying->setptr(zs->next_out);
+    } while (zs->avail_out == 0);
+  }
+
+  offset += ptr - start;
+  ptr = start;
+}
+
+int ZlibOutStream::overrun(int itemSize, int nItems)
+{
+//    fprintf(stderr,"ZlibOutStream overrun\n");
+
+  if (itemSize > bufSize)
+    throw Exception("ZlibOutStream overrun: max itemSize exceeded");
+
+  while (end - ptr < itemSize) {
+    zs->next_in = start;
+    zs->avail_in = ptr - start;
+
+    do {
+      underlying->check(1);
+      zs->next_out = underlying->getptr();
+      zs->avail_out = underlying->getend() - underlying->getptr();
+
+//        fprintf(stderr,"zos overrun: calling deflate, avail_in %d, avail_out %d\n",
+//                zs->avail_in,zs->avail_out);
+
+      checkCompressionLevel();
+      int rc = deflate(zs, 0);
+      if (rc != Z_OK) throw Exception("ZlibOutStream: deflate failed");
+
+//        fprintf(stderr,"zos overrun: after deflate: %d bytes\n",
+//                zs->next_out-underlying->getptr());
+
+      underlying->setptr(zs->next_out);
+    } while (zs->avail_out == 0);
+
+    // output buffer not full
+
+    if (zs->avail_in == 0) {
+      offset += ptr - start;
+      ptr = start;
+    } else {
+      // but didn't consume all the data?  try shifting what's left to the
+      // start of the buffer.
+      fprintf(stderr,"z out buf not full, but in data not consumed\n");
+      memmove(start, zs->next_in, ptr - zs->next_in);
+      offset += zs->next_in - start;
+      ptr -= zs->next_in - start;
+    }
+  }
+
+  if (itemSize * nItems > end - ptr)
+    nItems = (end - ptr) / itemSize;
+
+  return nItems;
+}
+
+void ZlibOutStream::checkCompressionLevel()
+{
+  if (newLevel != compressionLevel) {
+    if (deflateParams (zs, newLevel, Z_DEFAULT_STRATEGY) != Z_OK) {
+      throw Exception("ZlibOutStream: deflateParams failed");
+    }
+    compressionLevel = newLevel;
+  }
+}
diff --git a/common/rdr/ZlibOutStream.h b/common/rdr/ZlibOutStream.h
new file mode 100644
index 00000000..8027d27a
--- /dev/null
+++ b/common/rdr/ZlibOutStream.h
@@ -0,0 +1,61 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// ZlibOutStream streams to a compressed data stream (underlying), compressing
+// with zlib on the fly.
+//
+
+#ifndef __RDR_ZLIBOUTSTREAM_H__
+#define __RDR_ZLIBOUTSTREAM_H__
+
+#include <rdr/OutStream.h>
+
+struct z_stream_s;
+
+namespace rdr {
+
+  class ZlibOutStream : public OutStream {
+
+  public:
+
+    ZlibOutStream(OutStream* os=0, int bufSize=0, int compressionLevel=-1);
+    virtual ~ZlibOutStream();
+
+    void setUnderlying(OutStream* os);
+    void setCompressionLevel(int level=-1);
+    void flush();
+    int length();
+
+  private:
+
+    int overrun(int itemSize, int nItems);
+    void checkCompressionLevel();
+
+    OutStream* underlying;
+    int compressionLevel;
+    int newLevel;
+    int bufSize;
+    int offset;
+    z_stream_s* zs;
+    U8* start;
+  };
+
+} // end of namespace rdr
+
+#endif
diff --git a/common/rdr/msvcwarning.h b/common/rdr/msvcwarning.h
new file mode 100644
index 00000000..bea8d3f4
--- /dev/null
+++ b/common/rdr/msvcwarning.h
@@ -0,0 +1,26 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// Trim out extraneous cruft from windows.h includes
+#define WIN32_LEAN_AND_MEAN
+
+// Force all Windows NT-specific APIs to be visible
+#define _WIN32_WINNT 0xffff
+
+#pragma warning( disable : 4800 ) // forcing bool 'true' or 'false'
+#pragma warning( disable : 4786 ) // truncating debug information to 255 chars
\ No newline at end of file
diff --git a/common/rdr/rdr.dsp b/common/rdr/rdr.dsp
new file mode 100644
index 00000000..6717adfd
--- /dev/null
+++ b/common/rdr/rdr.dsp
@@ -0,0 +1,222 @@
+# Microsoft Developer Studio Project File - Name="rdr" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Static Library" 0x0104

+

+CFG=rdr - Win32 Debug Unicode

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "rdr.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "rdr.mak" CFG="rdr - Win32 Debug Unicode"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "rdr - Win32 Release" (based on "Win32 (x86) Static Library")

+!MESSAGE "rdr - Win32 Debug" (based on "Win32 (x86) Static Library")

+!MESSAGE "rdr - Win32 Debug Unicode" (based on "Win32 (x86) Static Library")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "rdr - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "..\Release"

+# PROP Intermediate_Dir "..\Release\rdr"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_MBCS" /D "_LIB" /YX /FD /c

+# ADD CPP /nologo /MT /W3 /GX /O1 /I ".." /FI"rdr/msvcwarning.h" /D "NDEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x809 /d "NDEBUG"

+# ADD RSC /l 0x809 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ELSEIF  "$(CFG)" == "rdr - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "..\Debug"

+# PROP Intermediate_Dir "..\Debug\rdr"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "_LIB" /YX /FD /GZ /c

+# ADD CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /I ".." /FI"rdr/msvcwarning.h" /D "_DEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x809 /d "_DEBUG"

+# ADD RSC /l 0x809 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ELSEIF  "$(CFG)" == "rdr - Win32 Debug Unicode"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "rdr___Win32_Debug_Unicode"

+# PROP BASE Intermediate_Dir "rdr___Win32_Debug_Unicode"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "..\Debug_Unicode"

+# PROP Intermediate_Dir "..\Debug_Unicode\rdr"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /I ".." /FI"msvcwarning.h" /D "_DEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /I ".." /FI"rdr/msvcwarning.h" /D "_LIB" /D "_DEBUG" /D "WIN32" /D "_UNICODE" /D "UNICODE" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x809 /d "_DEBUG"

+# ADD RSC /l 0x809 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ENDIF 

+

+# Begin Target

+

+# Name "rdr - Win32 Release"

+# Name "rdr - Win32 Debug"

+# Name "rdr - Win32 Debug Unicode"

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# Begin Source File

+

+SOURCE=.\Exception.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\FdInStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\FdOutStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\FixedMemOutStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\HexInStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\HexOutStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\InStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\MemInStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\MemOutStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\msvcwarning.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\OutStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\RandomStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\SubstitutingInStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\types.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\ZlibInStream.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\ZlibOutStream.h

+# End Source File

+# End Group

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=.\Exception.cxx

+# End Source File

+# Begin Source File

+

+SOURCE=.\FdInStream.cxx

+# ADD CPP /I "../zlib"

+# End Source File

+# Begin Source File

+

+SOURCE=.\FdOutStream.cxx

+# ADD CPP /I "../zlib"

+# End Source File

+# Begin Source File

+

+SOURCE=.\HexInStream.cxx

+# End Source File

+# Begin Source File

+

+SOURCE=.\HexOutStream.cxx

+# End Source File

+# Begin Source File

+

+SOURCE=.\InStream.cxx

+# ADD CPP /I "../zlib"

+# End Source File

+# Begin Source File

+

+SOURCE=.\RandomStream.cxx

+# End Source File

+# Begin Source File

+

+SOURCE=.\ZlibInStream.cxx

+# ADD CPP /I "../zlib"

+# End Source File

+# Begin Source File

+

+SOURCE=.\ZlibOutStream.cxx

+# ADD CPP /I "../zlib"

+# End Source File

+# End Group

+# End Target

+# End Project

diff --git a/common/rdr/types.h b/common/rdr/types.h
new file mode 100644
index 00000000..6421b137
--- /dev/null
+++ b/common/rdr/types.h
@@ -0,0 +1,66 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RDR_TYPES_H__
+#define __RDR_TYPES_H__
+
+namespace rdr {
+
+  typedef unsigned char U8;
+  typedef unsigned short U16;
+  typedef unsigned int U32;
+  typedef signed char S8;
+  typedef signed short S16;
+  typedef signed int S32;
+
+  class U8Array {
+  public:
+    U8Array() : buf(0) {}
+    U8Array(U8* a) : buf(a) {} // note: assumes ownership
+    U8Array(int len) : buf(new U8[len]) {}
+    ~U8Array() { delete [] buf; }
+
+    // Get the buffer pointer & clear it (i.e. caller takes ownership)
+    U8* takeBuf() { U8* tmp = buf; buf = 0; return tmp; }
+
+    U8* buf;
+  };
+
+  class U16Array {
+  public:
+    U16Array() : buf(0) {}
+    U16Array(U16* a) : buf(a) {} // note: assumes ownership
+    U16Array(int len) : buf(new U16[len]) {}
+    ~U16Array() { delete [] buf; }
+    U16* takeBuf() { U16* tmp = buf; buf = 0; return tmp; }
+    U16* buf;
+  };
+
+  class U32Array {
+  public:
+    U32Array() : buf(0) {}
+    U32Array(U32* a) : buf(a) {} // note: assumes ownership
+    U32Array(int len) : buf(new U32[len]) {}
+    ~U32Array() { delete [] buf; }
+    U32* takeBuf() { U32* tmp = buf; buf = 0; return tmp; }
+    U32* buf;
+  };
+
+} // end of namespace rdr
+
+#endif
diff --git a/common/rfb/Blacklist.cxx b/common/rfb/Blacklist.cxx
new file mode 100644
index 00000000..4590befe
--- /dev/null
+++ b/common/rfb/Blacklist.cxx
@@ -0,0 +1,86 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/Blacklist.h>
+#include <rfb/Configuration.h>
+
+using namespace rfb;
+
+IntParameter Blacklist::threshold("BlacklistThreshold",
+                              "The number of unauthenticated connection attempts allowed from any "
+                              "individual host before that host is black-listed",
+                              5);
+IntParameter Blacklist::initialTimeout("BlacklistTimeout",
+                              "The initial timeout applied when a host is first black-listed.  "
+                              "The host cannot re-attempt a connection until the timeout expires.",
+                              10);
+
+
+Blacklist::Blacklist() {
+}
+
+Blacklist::~Blacklist() {
+  // Free the map keys
+  BlacklistMap::iterator i;
+  for (i=blm.begin(); i!=blm.end(); i++) {
+    strFree((char*)(*i).first);
+  }
+}
+
+bool Blacklist::isBlackmarked(const char* name) {
+  BlacklistMap::iterator i = blm.find(name);
+  if (i == blm.end()) {
+    // Entry is not already black-marked.
+    // Create the entry unmarked, unblocked,
+    // with suitable defaults set.
+    BlacklistInfo bi;
+    bi.marks = 1;
+    bi.blockUntil = 0;
+    bi.blockTimeout = initialTimeout;
+    blm[strDup(name)] = bi;
+    i = blm.find(name);
+  }
+
+  // Entry exists - has it reached the threshold yet?
+  if ((*i).second.marks >= threshold) {
+    // Yes - entry is blocked - has the timeout expired?        
+    time_t now = time(0);
+    if (now >= (*i).second.blockUntil) {
+      // Timeout has expired.  Reset timeout and allow
+      // a re-try.
+      (*i).second.blockUntil = now + (*i).second.blockTimeout;
+      (*i).second.blockTimeout = (*i).second.blockTimeout * 2;
+      return false;
+    }
+    // Blocked and timeout still in effect - reject!
+    return true;
+  }
+
+  // We haven't reached the threshold yet.
+  // Increment the black-mark counter but allow
+  // the entry to pass.
+  (*i).second.marks++;
+  return false;
+}
+
+void Blacklist::clearBlackmark(const char* name) {
+  BlacklistMap::iterator i = blm.find(name);
+  if (i != blm.end()) {
+    strFree((char*)(*i).first);
+    blm.erase(i);
+  }
+}
diff --git a/common/rfb/Blacklist.h b/common/rfb/Blacklist.h
new file mode 100644
index 00000000..0eb38460
--- /dev/null
+++ b/common/rfb/Blacklist.h
@@ -0,0 +1,91 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// Blacklist.h - Handling of black-listed entities.
+// Just keeps a table mapping strings to timing information, including
+// how many times the entry has been black-listed and when to next
+// put it on probation (e.g. allow a connection in from the host, and
+// re-blacklist it if that fails). 
+//
+
+#ifndef __RFB_BLACKLIST_H__
+#define __RFB_BLACKLIST_H__
+
+#include <string.h>
+#include <time.h>
+#include <map>
+
+#include <rfb/Configuration.h>
+#include <rfb/util.h>
+
+namespace rfb {
+
+  //
+  // -=- Blacklist handler
+  //
+  // Parameters include a threshold after which to blacklist the named
+  // host, and a timeout after which to re-consider them.
+  //
+  // Threshold means that isBlackmarked can be called that number of times
+  // before it will return true.
+  //
+  // Timeout means that after that many seconds, the next call to isBlackmarked
+  // will return false.  At the same time, the timeout is doubled, so that the
+  // next calls will fail, until the timeout expires again or clearBlackmark is
+  // called.
+  //
+  // When clearBlackMark is called, the corresponding entry is completely
+  // removed, causing the next isBlackmarked call to return false.
+
+  // KNOWN BUG:  Client can keep making rejected requests, thus increasing
+  // their timeout.  If client does this for 30 years, timeout may wrap round
+  // to a very small value again.
+
+  // THIS CLASS IS NOT THREAD-SAFE!
+
+  class Blacklist {
+  public:
+    Blacklist();
+    ~Blacklist();
+
+    bool isBlackmarked(const char* name);
+    void clearBlackmark(const char* name);
+
+    static IntParameter threshold;
+    static IntParameter initialTimeout;
+
+  protected:
+    struct ltStr {
+      bool operator()(const char* s1, const char* s2) const {
+        return strcmp(s1, s2) < 0;
+      };
+    };
+    struct BlacklistInfo {
+      int marks;
+      time_t blockUntil;
+      unsigned int blockTimeout;
+    };
+    typedef std::map<const char*,BlacklistInfo,ltStr> BlacklistMap;
+    BlacklistMap blm;
+  };
+
+}
+
+#endif
+
diff --git a/common/rfb/CConnection.cxx b/common/rfb/CConnection.cxx
new file mode 100644
index 00000000..36778f02
--- /dev/null
+++ b/common/rfb/CConnection.cxx
@@ -0,0 +1,276 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <rfb/Exception.h>
+#include <rfb/CMsgReaderV3.h>
+#include <rfb/CMsgWriterV3.h>
+#include <rfb/CSecurity.h>
+#include <rfb/secTypes.h>
+#include <rfb/CConnection.h>
+#include <rfb/util.h>
+
+#include <rfb/LogWriter.h>
+
+using namespace rfb;
+
+static LogWriter vlog("CConnection");
+
+CConnection::CConnection()
+  : is(0), os(0), reader_(0), writer_(0),
+    shared(false), security(0), nSecTypes(0), clientSecTypeOrder(false),
+    state_(RFBSTATE_UNINITIALISED), useProtocol3_3(false)
+{
+}
+
+CConnection::~CConnection()
+{
+  if (security) security->destroy();
+  deleteReaderAndWriter();
+}
+
+void CConnection::deleteReaderAndWriter()
+{
+  delete reader_;
+  reader_ = 0;
+  delete writer_;
+  writer_ = 0;
+}
+
+void CConnection::setStreams(rdr::InStream* is_, rdr::OutStream* os_)
+{
+  is = is_;
+  os = os_;
+}
+
+void CConnection::addSecType(rdr::U8 secType)
+{
+  if (nSecTypes == maxSecTypes)
+    throw Exception("too many security types");
+  secTypes[nSecTypes++] = secType;
+}
+
+void CConnection::setClientSecTypeOrder(bool clientOrder) {
+  clientSecTypeOrder = clientOrder;
+}
+
+void CConnection::initialiseProtocol()
+{
+  state_ = RFBSTATE_PROTOCOL_VERSION;
+}
+
+void CConnection::processMsg()
+{
+  switch (state_) {
+
+  case RFBSTATE_PROTOCOL_VERSION: processVersionMsg();       break;
+  case RFBSTATE_SECURITY_TYPES:   processSecurityTypesMsg(); break;
+  case RFBSTATE_SECURITY:         processSecurityMsg();      break;
+  case RFBSTATE_SECURITY_RESULT:  processSecurityResultMsg(); break;
+  case RFBSTATE_INITIALISATION:   processInitMsg();          break;
+  case RFBSTATE_NORMAL:           reader_->readMsg();        break;
+  case RFBSTATE_UNINITIALISED:
+    throw Exception("CConnection::processMsg: not initialised yet?");
+  default:
+    throw Exception("CConnection::processMsg: invalid state");
+  }
+}
+
+void CConnection::processVersionMsg()
+{
+  vlog.debug("reading protocol version");
+  bool done;
+  if (!cp.readVersion(is, &done)) {
+    state_ = RFBSTATE_INVALID;
+    throw Exception("reading version failed: not an RFB server?");
+  }
+  if (!done) return;
+
+  vlog.info("Server supports RFB protocol version %d.%d",
+            cp.majorVersion, cp.minorVersion);
+
+  // The only official RFB protocol versions are currently 3.3, 3.7 and 3.8
+  if (cp.beforeVersion(3,3)) {
+    char msg[256];
+    sprintf(msg,"Server gave unsupported RFB protocol version %d.%d",
+            cp.majorVersion, cp.minorVersion);
+    vlog.error(msg);
+    state_ = RFBSTATE_INVALID;
+    throw Exception(msg);
+  } else if (useProtocol3_3 || cp.beforeVersion(3,7)) {
+    cp.setVersion(3,3);
+  } else if (cp.afterVersion(3,8)) {
+    cp.setVersion(3,8);
+  }
+
+  cp.writeVersion(os);
+  state_ = RFBSTATE_SECURITY_TYPES;
+
+  vlog.info("Using RFB protocol version %d.%d",
+            cp.majorVersion, cp.minorVersion);
+}
+
+
+void CConnection::processSecurityTypesMsg()
+{
+  vlog.debug("processing security types message");
+
+  int secType = secTypeInvalid;
+
+  if (cp.isVersion(3,3)) {
+
+    // legacy 3.3 server may only offer "vnc authentication" or "none"
+
+    secType = is->readU32();
+    if (secType == secTypeInvalid) {
+      throwConnFailedException();
+
+    } else if (secType == secTypeNone || secType == secTypeVncAuth) {
+      int j;
+      for (j = 0; j < nSecTypes; j++)
+        if (secTypes[j] == secType) break;
+      if (j == nSecTypes)
+        secType = secTypeInvalid;
+    } else {
+      vlog.error("Unknown 3.3 security type %d", secType);
+      throw Exception("Unknown 3.3 security type");
+    }
+
+  } else {
+
+    // >=3.7 server will offer us a list
+
+    int nServerSecTypes = is->readU8();
+    if (nServerSecTypes == 0)
+      throwConnFailedException();
+
+    int secTypePos = nSecTypes;
+    for (int i = 0; i < nServerSecTypes; i++) {
+      rdr::U8 serverSecType = is->readU8();
+      vlog.debug("Server offers security type %s(%d)",
+                 secTypeName(serverSecType),serverSecType);
+
+      // If we haven't already chosen a secType, try this one
+      // If we are using the client's preference for types,
+      // we keep trying types, to find the one that matches and
+      // which appears first in the client's list of supported types.
+      if (secType == secTypeInvalid || clientSecTypeOrder) {
+        for (int j = 0; j < nSecTypes; j++) {
+          if (secTypes[j] == serverSecType && j < secTypePos) {
+            secType = secTypes[j];
+            secTypePos = j;
+            break;
+          }
+        }
+        // NB: Continue reading the remaining server secTypes, but ignore them
+      }
+    }
+
+    // Inform the server of our decision
+    if (secType != secTypeInvalid) {
+      os->writeU8(secType);
+      os->flush();
+      vlog.debug("Choosing security type %s(%d)",secTypeName(secType),secType);
+    }
+  }
+
+  if (secType == secTypeInvalid) {
+    state_ = RFBSTATE_INVALID;
+    vlog.error("No matching security types");
+    throw Exception("No matching security types");
+  }
+
+  state_ = RFBSTATE_SECURITY;
+  security = getCSecurity(secType);
+  processSecurityMsg();
+}
+
+void CConnection::processSecurityMsg()
+{
+  vlog.debug("processing security message");
+  if (security->processMsg(this)) {
+    state_ = RFBSTATE_SECURITY_RESULT;
+    processSecurityResultMsg();
+  }
+}
+
+void CConnection::processSecurityResultMsg()
+{
+  vlog.debug("processing security result message");
+  int result;
+  if (cp.beforeVersion(3,8) && security->getType() == secTypeNone) {
+    result = secResultOK;
+  } else {
+    if (!is->checkNoWait(1)) return;
+    result = is->readU32();
+  }
+  switch (result) {
+  case secResultOK:
+    securityCompleted();
+    return;
+  case secResultFailed:
+    vlog.debug("auth failed");
+    break;
+  case secResultTooMany:
+    vlog.debug("auth failed - too many tries");
+    break;
+  default:
+    throw Exception("Unknown security result from server");
+  }
+  CharArray reason;
+  if (cp.beforeVersion(3,8))
+    reason.buf = strDup("Authentication failure");
+  else
+    reason.buf = is->readString();
+  state_ = RFBSTATE_INVALID;
+  throw AuthFailureException(reason.buf);
+}
+
+void CConnection::processInitMsg()
+{
+  vlog.debug("reading server initialisation");
+  reader_->readServerInit();
+}
+
+void CConnection::throwConnFailedException()
+{
+  state_ = RFBSTATE_INVALID;
+  CharArray reason;
+  reason.buf = is->readString();
+  throw ConnFailedException(reason.buf);
+}
+
+void CConnection::securityCompleted()
+{
+  state_ = RFBSTATE_INITIALISATION;
+  reader_ = new CMsgReaderV3(this, is);
+  writer_ = new CMsgWriterV3(&cp, os);
+  vlog.debug("Authentication success!");
+  authSuccess();
+  writer_->writeClientInit(shared);
+}
+
+void CConnection::authSuccess()
+{
+}
+
+void CConnection::serverInit()
+{
+  state_ = RFBSTATE_NORMAL;
+  vlog.debug("initialisation done");
+}
diff --git a/common/rfb/CConnection.h b/common/rfb/CConnection.h
new file mode 100644
index 00000000..79110eb9
--- /dev/null
+++ b/common/rfb/CConnection.h
@@ -0,0 +1,183 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// CConnection - class on the client side representing a connection to a
+// server.  A derived class should override methods appropriately.
+//
+
+#ifndef __RFB_CCONNECTION_H__
+#define __RFB_CCONNECTION_H__
+
+#include <rdr/InStream.h>
+#include <rdr/OutStream.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/util.h>
+
+namespace rfb {
+
+  class CMsgReader;
+  class CMsgWriter;
+  class CSecurity;
+  class IdentityVerifier;
+
+  class CConnection : public CMsgHandler {
+  public:
+
+    CConnection();
+    virtual ~CConnection();
+
+    // Methods to initialise the connection
+
+    // setServerName() is used to provide a unique(ish) name for the server to
+    // which we are connected.  This might be the result of getPeerEndpoint on
+    // a TcpSocket, for example, or a host specified by DNS name & port.
+    // The serverName is used when verifying the Identity of a host (see RA2).
+    void setServerName(const char* name_) { serverName.replaceBuf(strDup(name_)); }
+
+    // setStreams() sets the streams to be used for the connection.  These must
+    // be set before initialiseProtocol() and processMsg() are called.  The
+    // CSecurity object may call setStreams() again to provide alternative
+    // streams over which the RFB protocol is sent (i.e. encrypting/decrypting
+    // streams).  Ownership of the streams remains with the caller
+    // (i.e. SConnection will not delete them).
+    void setStreams(rdr::InStream* is, rdr::OutStream* os);
+
+    // addSecType() should be called once for each security type which the
+    // client supports.  The order in which they're added is such that the
+    // first one is most preferred.
+    void addSecType(rdr::U8 secType);
+
+    // setClientSecTypeOrder() determines whether the client should obey
+    // the server's security type preference, by picking the first server security
+    // type that the client supports, or whether it should pick the first type
+    // that the server supports, from the client-supported list of types.
+    void setClientSecTypeOrder(bool clientOrder);
+
+    // setShared sets the value of the shared flag which will be sent to the
+    // server upon initialisation.
+    void setShared(bool s) { shared = s; }
+
+    // setProtocol3_3 configures whether or not the CConnection should
+    // only ever support protocol version 3.3
+    void setProtocol3_3(bool s) {useProtocol3_3 = s;}
+
+    // initialiseProtocol() should be called once the streams and security
+    // types are set.  Subsequently, processMsg() should be called whenever
+    // there is data to read on the InStream.
+    void initialiseProtocol();
+
+    // processMsg() should be called whenever there is either:
+    // - data available on the underlying network stream
+    //   In this case, processMsg may return without processing an RFB message,
+    //   if the available data does not result in an RFB message being ready
+    //   to handle. e.g. if data is encrypted.
+    // NB: This makes it safe to call processMsg() in response to select()
+    // - data available on the CConnection's current InStream
+    //   In this case, processMsg should always process the available RFB
+    //   message before returning.
+    // NB: In either case, you must have called initialiseProtocol() first.
+    void processMsg();
+
+
+    // Methods to be overridden in a derived class
+
+    // getCSecurity() gets the CSecurity object for the given type.  The type
+    // is guaranteed to be one of the secTypes passed in to addSecType().  The
+    // CSecurity object's destroy() method will be called by the CConnection
+    // from its destructor.
+    virtual CSecurity* getCSecurity(int secType)=0;
+
+    // getCurrentCSecurity() gets the CSecurity instance used for this connection.
+    const CSecurity* getCurrentCSecurity() const {return security;} 
+
+    // getIdVerifier() returns the identity verifier associated with the connection.
+    // Ownership of the IdentityVerifier is retained by the CConnection instance.
+    virtual IdentityVerifier* getIdentityVerifier() {return 0;}
+
+    // authSuccess() is called when authentication has succeeded.
+    virtual void authSuccess();
+
+    // serverInit() is called when the ServerInit message is received.  The
+    // derived class must call on to CConnection::serverInit().
+    virtual void serverInit();
+
+
+    // Other methods
+
+    // deleteReaderAndWriter() deletes the reader and writer associated with
+    // this connection.  This may be useful if you want to delete the streams
+    // before deleting the SConnection to make sure that no attempt by the
+    // SConnection is made to read or write.
+    // XXX Do we really need this at all???
+    void deleteReaderAndWriter();
+
+    CMsgReader* reader() { return reader_; }
+    CMsgWriter* writer() { return writer_; }
+
+    rdr::InStream* getInStream() { return is; }
+    rdr::OutStream* getOutStream() { return os; }
+
+    // Access method used by SSecurity implementations that can verify servers'
+    // Identities, to determine the unique(ish) name of the server.
+    const char* getServerName() const { return serverName.buf; }
+
+    enum stateEnum {
+      RFBSTATE_UNINITIALISED,
+      RFBSTATE_PROTOCOL_VERSION,
+      RFBSTATE_SECURITY_TYPES,
+      RFBSTATE_SECURITY,
+      RFBSTATE_SECURITY_RESULT,
+      RFBSTATE_INITIALISATION,
+      RFBSTATE_NORMAL,
+      RFBSTATE_INVALID
+    };
+
+    stateEnum state() { return state_; }
+
+  protected:
+    void setState(stateEnum s) { state_ = s; }
+
+  private:
+    void processVersionMsg();
+    void processSecurityTypesMsg();
+    void processSecurityMsg();
+    void processSecurityResultMsg();
+    void processInitMsg();
+    void throwAuthFailureException();
+    void throwConnFailedException();
+    void securityCompleted();
+
+    rdr::InStream* is;
+    rdr::OutStream* os;
+    CMsgReader* reader_;
+    CMsgWriter* writer_;
+    bool deleteStreamsWhenDone;
+    bool shared;
+    CSecurity* security;
+    enum { maxSecTypes = 8 };
+    int nSecTypes;
+    rdr::U8 secTypes[maxSecTypes];
+    bool clientSecTypeOrder;
+    stateEnum state_;
+
+    CharArray serverName;
+
+    bool useProtocol3_3;
+  };
+}
+#endif
diff --git a/common/rfb/CFTMsgReader.cxx b/common/rfb/CFTMsgReader.cxx
new file mode 100644
index 00000000..5a17fc25
--- /dev/null
+++ b/common/rfb/CFTMsgReader.cxx
@@ -0,0 +1,162 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- CFTMsgReader.cxx
+
+#include <rfb/CFTMsgReader.h>
+
+using namespace rfb;
+
+CFTMsgReader::CFTMsgReader(rdr::InStream *pIS)
+{
+  m_pInStream = pIS;
+}
+
+CFTMsgReader::~CFTMsgReader()
+{
+
+}
+
+int 
+CFTMsgReader::readFileListData(FileInfo *pFileInfo)
+{
+  unsigned char flags = m_pInStream->readU8();
+  int numFiles = m_pInStream->readU16();
+  int dataSize = m_pInStream->readU16();
+  int compressedSize = m_pInStream->readU16();
+  
+  if (flags & 0x80) {
+    return -1;
+  } else {
+    if (numFiles > 0) {
+      char *pFilenames = new char[compressedSize];
+      SIZEDATAINFO *pSDI = new SIZEDATAINFO[numFiles];
+      for (int i = 0; i < numFiles; i++) {
+        pSDI[i].size = m_pInStream->readU32();
+        pSDI[i].data = m_pInStream->readU32();
+      }
+      m_pInStream->readBytes((void *)pFilenames, compressedSize);
+      createFileInfo(numFiles, pFileInfo, pSDI, pFilenames);
+      delete [] pSDI;
+      delete [] pFilenames;
+    }
+  }
+  return numFiles;
+}
+
+void * 
+CFTMsgReader::readFileDownloadData(unsigned int *pSize, unsigned int *pModTime)
+{
+  unsigned char compressLevel = m_pInStream->readU8();
+  int realSize = m_pInStream->readU16();
+  int compressedSize = m_pInStream->readU16();
+
+  if ((realSize == 0) && (compressedSize == 0)) {
+    *pSize = 0;
+    *pModTime = m_pInStream->readU32();
+    return NULL;
+  } else {
+    char *pFile = new char [compressedSize];
+    if (pFile == NULL) {
+      m_pInStream->skip(compressedSize);
+      *pModTime = 0;
+      return NULL;
+    } else {
+      m_pInStream->readBytes(pFile, compressedSize);
+      *pSize = compressedSize;
+      return pFile;
+    }
+  }
+}
+
+char * 
+CFTMsgReader::readFileUploadCancel(unsigned int *pReasonSize)
+{
+  m_pInStream->skip(1);
+  return readReasonMsg(pReasonSize);
+}
+
+char * 
+CFTMsgReader::readFileDownloadFailed(unsigned int *pReasonSize)
+{
+  m_pInStream->skip(1);
+  return readReasonMsg(pReasonSize);
+}
+
+int 
+CFTMsgReader::readFileDirSizeData(unsigned short *pDirSizeLow16, 
+                                 unsigned int *pDirSizeHigh32)
+{
+  m_pInStream->skip(1);
+  *pDirSizeLow16 = m_pInStream->readU16();
+  *pDirSizeHigh32 = m_pInStream->readU32();
+  return 1;
+}
+
+char * 
+CFTMsgReader::readFileLastRqstFailed(int *pTypeOfRequest, unsigned int *pReasonSize)
+{
+  *pTypeOfRequest = m_pInStream->readU8();
+  return readReasonMsg(pReasonSize);
+}
+
+bool 
+CFTMsgReader::createFileInfo(unsigned int numFiles, FileInfo *fi, 
+                             SIZEDATAINFO *pSDInfo, char *pFilenames)
+{
+  int pos = 0;
+  int size = 0;
+  for (unsigned int i = 0; i < numFiles; i++) {
+    size = pSDInfo[i].size;
+    if (size == FT_NET_ATTR_DIR) {
+      fi->add((pFilenames + pos), size, pSDInfo[i].data, FT_ATTR_DIR);
+    } else {
+      fi->add((pFilenames + pos), size, pSDInfo[i].data, FT_ATTR_FILE);
+    }
+    pos += strlen(pFilenames + pos) + 1;
+  }
+  return true;
+}
+
+char * 
+CFTMsgReader::readReasonMsg(unsigned int *pReasonSize)
+{
+  int reasonLen = m_pInStream->readU16();
+  int _reasonLen = reasonLen + 1;
+  char *pReason;
+  if (reasonLen == 0) {
+    *pReasonSize = 0;
+    return NULL;
+  } else {
+    pReason = new char [_reasonLen];
+    if (pReason == NULL) {
+      m_pInStream->skip(reasonLen);
+      *pReasonSize = 0;
+      return NULL;
+    }
+    m_pInStream->readBytes(pReason, reasonLen);
+    memset(((char *)pReason+reasonLen), '\0', 1);
+    return pReason;
+  }
+}
+
diff --git a/common/rfb/CFTMsgReader.h b/common/rfb/CFTMsgReader.h
new file mode 100644
index 00000000..aece3e78
--- /dev/null
+++ b/common/rfb/CFTMsgReader.h
@@ -0,0 +1,56 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- CFTMsgReader.h
+
+#ifndef __RFB_CFTMSGREADER_H__
+#define __RFB_CFTMSGREADER_H__
+
+#include <rdr/InStream.h>
+#include <rfb/FileInfo.h>
+
+namespace rfb {
+  class CFTMsgReader
+  {
+  public:
+    CFTMsgReader(rdr::InStream *pIS);
+    ~CFTMsgReader();
+    
+    int readFileListData(FileInfo *pFileInfo);
+    int readFileDirSizeData(unsigned short *pDirSizeLow16, unsigned int *pDirSizeHigh32);
+    
+    char *readFileUploadCancel(unsigned int *pReasonSize);
+    char *readFileDownloadFailed(unsigned int *pReasonSize);
+    char *readFileLastRqstFailed(int *pTypeOfRequest, unsigned int *pReasonSize);
+    void *readFileDownloadData(unsigned int *pSize, unsigned int *pModTime);
+    
+  private:
+    rdr::InStream *m_pInStream;
+    
+    bool createFileInfo(unsigned int numFiles, FileInfo *fi, 
+                        SIZEDATAINFO *pSDInfo, char *pFilenames);
+    char *readReasonMsg(unsigned int *pReasonSize);
+  };
+}
+
+#endif // __RFB_CFTMSGREADER_H__
diff --git a/common/rfb/CFTMsgWriter.cxx b/common/rfb/CFTMsgWriter.cxx
new file mode 100644
index 00000000..5e6854ed
--- /dev/null
+++ b/common/rfb/CFTMsgWriter.cxx
@@ -0,0 +1,182 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- CFTMsgWriter.cxx
+
+#include <rfb/CFTMsgWriter.h>
+
+using namespace rfb;
+
+CFTMsgWriter::CFTMsgWriter(rdr::OutStream *pOS)
+{
+  m_pOutStream = pOS;
+}
+
+CFTMsgWriter::~CFTMsgWriter()
+{
+}
+
+bool 
+CFTMsgWriter::writeFileListRqst(unsigned short dirnameLen, char *pDirName, 
+                                bool bDirOnly)
+{
+  if (dirnameLen >= FT_FILENAME_SIZE) return false;
+
+  unsigned char flags = 0;
+  if (bDirOnly) flags = 0x10;
+
+  m_pOutStream->writeU8(msgTypeFileListRequest);
+  m_pOutStream->writeU8(flags);
+  m_pOutStream->writeU16(dirnameLen);
+  m_pOutStream->writeBytes((void *)pDirName, dirnameLen);
+  m_pOutStream->flush();
+
+  return true;
+}
+
+
+bool 
+CFTMsgWriter::writeFileDownloadCancel(unsigned short reasonLen, char *pReason)
+{
+  m_pOutStream->writeU8(msgTypeFileDownloadCancel);
+  return writeU8U16StringMsg(reasonLen, pReason);
+}
+
+bool 
+CFTMsgWriter::writeFileDownloadRqst(unsigned short filenameLen, char *pFilename, 
+                                    unsigned int position)
+{
+  if (filenameLen >= FT_FILENAME_SIZE) return false;
+
+  m_pOutStream->writeU8(msgTypeFileDownloadRequest);
+  m_pOutStream->writeU8(0);
+  m_pOutStream->writeU16(filenameLen);
+  m_pOutStream->writeU32(position);
+  m_pOutStream->writeBytes(pFilename, filenameLen);
+  m_pOutStream->flush();
+
+  return true;
+}
+
+bool 
+CFTMsgWriter::writeFileUploadData(unsigned short dataSize, char *pData)
+{
+  m_pOutStream->writeU8(msgTypeFileUploadData);
+  m_pOutStream->writeU8(0);
+  m_pOutStream->writeU16(dataSize);
+  m_pOutStream->writeU16(dataSize);
+  m_pOutStream->writeBytes(pData, dataSize);
+  m_pOutStream->flush();
+
+  return true;
+}
+
+bool 
+CFTMsgWriter::writeFileUploadData(unsigned int modTime)
+{
+  m_pOutStream->writeU8(msgTypeFileUploadData);
+  m_pOutStream->writeU8(0);
+  m_pOutStream->writeU16(0);
+  m_pOutStream->writeU16(0);
+  m_pOutStream->writeU32(modTime);
+  m_pOutStream->flush();
+
+  return true;
+}
+
+bool 
+CFTMsgWriter::writeFileUploadFailed(unsigned short reasonLen, char *pReason)
+{
+  m_pOutStream->writeU8(msgTypeFileUploadFailed);
+  return writeU8U16StringMsg(reasonLen, pReason);
+}
+
+bool 
+CFTMsgWriter::writeFileUploadRqst(unsigned short filenameLen, char *pFilename, 
+                                  unsigned int position)
+{
+  if (filenameLen >= FT_FILENAME_SIZE) return false;
+
+  m_pOutStream->writeU8(msgTypeFileUploadRequest);
+  m_pOutStream->writeU8(0);
+  m_pOutStream->writeU16(filenameLen);
+  m_pOutStream->writeU32(position);
+  m_pOutStream->writeBytes((void *)pFilename, filenameLen);
+  m_pOutStream->flush();
+
+  return true;
+}
+
+bool 
+CFTMsgWriter::writeFileCreateDirRqst(unsigned short dirNameLen, char *pDirName)
+{
+  if (dirNameLen >= FT_FILENAME_SIZE) return false;
+
+  m_pOutStream->writeU8(msgTypeFileCreateDirRequest);
+  return writeU8U16StringMsg(dirNameLen, pDirName);
+}
+
+bool 
+CFTMsgWriter::writeFileDirSizeRqst(unsigned short dirNameLen, char *pDirName)
+{
+  if (dirNameLen >= FT_FILENAME_SIZE) return false;
+
+  m_pOutStream->writeU8(msgTypeFileDirSizeRequest);
+  return writeU8U16StringMsg(dirNameLen, pDirName);
+}
+
+bool 
+CFTMsgWriter::writeFileRenameRqst(unsigned short oldNameLen, unsigned short newNameLen,
+                                  char *pOldName, char *pNewName)
+{
+  if ((oldNameLen >= FT_FILENAME_SIZE) || (newNameLen >= FT_FILENAME_SIZE)) return false;
+
+  m_pOutStream->writeU8(msgTypeFileRenameRequest);
+  m_pOutStream->writeU8(0);
+  m_pOutStream->writeU16(oldNameLen);
+  m_pOutStream->writeU16(newNameLen);
+  m_pOutStream->writeBytes(pOldName, oldNameLen);
+  m_pOutStream->writeBytes(pNewName, newNameLen);
+  m_pOutStream->flush();
+  
+  return true;
+}
+
+bool 
+CFTMsgWriter::writeFileDeleteRqst(unsigned short nameLen, char *pName)
+{
+  if (nameLen >= FT_FILENAME_SIZE) return false;
+
+  m_pOutStream->writeU8(msgTypeFileDeleteRequest);
+  return writeU8U16StringMsg(nameLen, pName);
+}
+
+bool 
+CFTMsgWriter::writeU8U16StringMsg(unsigned short strLength, char *pString)
+{
+  m_pOutStream->writeU8(0);
+  m_pOutStream->writeU16(strLength);
+  m_pOutStream->writeBytes(pString, strLength);
+  m_pOutStream->flush();
+  return true;
+}
diff --git a/common/rfb/CFTMsgWriter.h b/common/rfb/CFTMsgWriter.h
new file mode 100644
index 00000000..e4cdc0bd
--- /dev/null
+++ b/common/rfb/CFTMsgWriter.h
@@ -0,0 +1,67 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- CFTMsgWriter.h
+
+#ifndef __RFB_CFTMSGWRITER_H__
+#define __RFB_CFTMSGWRITER_H__
+
+#include <rdr/types.h>
+#include <rdr/OutStream.h>
+#include <rfb/msgTypes.h>
+#include <rfb/fttypes.h>
+
+namespace rfb {
+  class CFTMsgWriter
+  {
+  public:
+    CFTMsgWriter(rdr::OutStream *pOS);
+    ~CFTMsgWriter();
+    
+    bool writeFileListRqst(unsigned short dirnameLen, char *pDirName, bool bDirOnly);
+    
+    bool writeFileDownloadCancel(unsigned short reasonLen, char *pReason);
+    bool writeFileDownloadRqst(unsigned short filenameLen, char *pFilename, 
+                               unsigned int position);
+    
+    bool writeFileUploadData(unsigned short dataSize, char *pData);
+    bool writeFileUploadData(unsigned int modTime);
+    bool writeFileUploadFailed(unsigned short reasonLen, char *pReason);
+    bool writeFileUploadRqst(unsigned short filenameLen, char *pFilename, 
+                             unsigned int position);
+    
+    bool writeFileCreateDirRqst(unsigned short dirNameLen, char *pDirName);
+    bool writeFileDirSizeRqst(unsigned short dirNameLen, char *pDirName);
+    
+    bool writeFileRenameRqst(unsigned short oldNameLen, unsigned short newNameLen,
+                             char *pOldName, char *pNewName);
+    bool writeFileDeleteRqst(unsigned short nameLen, char *pName);
+    
+  private:
+    rdr::OutStream *m_pOutStream;
+    
+    bool writeU8U16StringMsg(unsigned short strLength, char *pString);
+  };
+}
+
+#endif // __RFB_CFTMSGWRITER_H__
diff --git a/common/rfb/CMsgHandler.cxx b/common/rfb/CMsgHandler.cxx
new file mode 100644
index 00000000..bbc11763
--- /dev/null
+++ b/common/rfb/CMsgHandler.cxx
@@ -0,0 +1,103 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/Exception.h>
+#include <rfb/CMsgHandler.h>
+
+using namespace rfb;
+
+CMsgHandler::CMsgHandler()
+{
+}
+
+CMsgHandler::~CMsgHandler()
+{
+}
+
+void CMsgHandler::setDesktopSize(int width, int height)
+{
+  cp.width = width;
+  cp.height = height;
+}
+
+void CMsgHandler::setCursor(int w, int h, const Point& hotspot, void* data, void* mask)
+{
+}
+
+void CMsgHandler::setPixelFormat(const PixelFormat& pf)
+{
+  cp.setPF(pf);
+}
+
+void CMsgHandler::setName(const char* name)
+{
+  cp.setName(name);
+}
+
+void CMsgHandler::serverInit()
+{
+  throw Exception("CMsgHandler::serverInit called");
+}
+
+void CMsgHandler::framebufferUpdateStart()
+{
+}
+
+void CMsgHandler::framebufferUpdateEnd()
+{
+}
+
+void CMsgHandler::beginRect(const Rect& r, unsigned int encoding)
+{
+}
+
+void CMsgHandler::endRect(const Rect& r, unsigned int encoding)
+{
+}
+
+
+void CMsgHandler::setColourMapEntries(int firstColour, int nColours,
+                                      rdr::U16* rgbs)
+{
+  throw Exception("CMsgHandler::setColourMapEntries called");
+}
+
+void CMsgHandler::bell()
+{
+}
+
+void CMsgHandler::serverCutText(const char* str, int len)
+{
+}
+
+void CMsgHandler::fillRect(const Rect& r, Pixel pix)
+{
+}
+
+void CMsgHandler::imageRect(const Rect& r, void* pixels)
+{
+}
+
+void CMsgHandler::copyRect(const Rect& r, int srcX, int srcY)
+{
+}
+
+bool CMsgHandler::processFTMsg(int type)
+{
+  return false;
+}
+
diff --git a/common/rfb/CMsgHandler.h b/common/rfb/CMsgHandler.h
new file mode 100644
index 00000000..6c86df01
--- /dev/null
+++ b/common/rfb/CMsgHandler.h
@@ -0,0 +1,71 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// CMsgHandler - class to handle incoming messages on the client side.
+//
+
+#ifndef __RFB_CMSGHANDLER_H__
+#define __RFB_CMSGHANDLER_H__
+
+#include <rdr/types.h>
+#include <rfb/Pixel.h>
+#include <rfb/ConnParams.h>
+#include <rfb/Rect.h>
+
+namespace rdr { class InStream; }
+
+namespace rfb {
+
+  class CMsgHandler {
+  public:
+    CMsgHandler();
+    virtual ~CMsgHandler();
+
+    // The following methods are called as corresponding messages are read.  A
+    // derived class should override these methods as desired.  Note that for
+    // the setDesktopSize(), setPixelFormat() and setName() methods, a derived
+    // class should call on to CMsgHandler's methods to set the members of cp
+    // appropriately.
+
+    virtual void setDesktopSize(int w, int h);
+    virtual void setCursor(int width, int height, const Point& hotspot,
+                           void* data, void* mask);
+    virtual void setPixelFormat(const PixelFormat& pf);
+    virtual void setName(const char* name);
+    virtual void serverInit();
+
+    virtual void framebufferUpdateStart();
+    virtual void framebufferUpdateEnd();
+    virtual void beginRect(const Rect& r, unsigned int encoding);
+    virtual void endRect(const Rect& r, unsigned int encoding);
+
+    virtual void setColourMapEntries(int firstColour, int nColours,
+				     rdr::U16* rgbs);
+    virtual void bell();
+    virtual void serverCutText(const char* str, int len);
+
+    virtual void fillRect(const Rect& r, Pixel pix);
+    virtual void imageRect(const Rect& r, void* pixels);
+    virtual void copyRect(const Rect& r, int srcX, int srcY);
+
+    virtual bool processFTMsg(int type);
+
+    ConnParams cp;
+  };
+}
+#endif
diff --git a/common/rfb/CMsgReader.cxx b/common/rfb/CMsgReader.cxx
new file mode 100644
index 00000000..38547c0f
--- /dev/null
+++ b/common/rfb/CMsgReader.cxx
@@ -0,0 +1,158 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <rdr/InStream.h>
+#include <rfb/Exception.h>
+#include <rfb/util.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/CMsgReader.h>
+
+using namespace rfb;
+
+CMsgReader::CMsgReader(CMsgHandler* handler_, rdr::InStream* is_)
+  : imageBufIdealSize(0), handler(handler_), is(is_),
+    imageBuf(0), imageBufSize(0)
+{
+  for (unsigned int i = 0; i <= encodingMax; i++) {
+    decoders[i] = 0;
+  }
+}
+
+CMsgReader::~CMsgReader()
+{
+  for (unsigned int i = 0; i <= encodingMax; i++) {
+    delete decoders[i];
+  }
+  delete [] imageBuf;
+}
+
+void CMsgReader::readSetColourMapEntries()
+{
+  is->skip(1);
+  int firstColour = is->readU16();
+  int nColours = is->readU16();
+  rdr::U16Array rgbs(nColours * 3);
+  for (int i = 0; i < nColours * 3; i++)
+    rgbs.buf[i] = is->readU16();
+  handler->setColourMapEntries(firstColour, nColours, rgbs.buf);
+}
+
+void CMsgReader::readBell()
+{
+  handler->bell();
+}
+
+void CMsgReader::readServerCutText()
+{
+  is->skip(3);
+  int len = is->readU32();
+  if (len > 256*1024) {
+    is->skip(len);
+    fprintf(stderr,"cut text too long (%d bytes) - ignoring\n",len);
+    return;
+  }
+  CharArray ca(len+1);
+  ca.buf[len] = 0;
+  is->readBytes(ca.buf, len);
+  handler->serverCutText(ca.buf, len);
+}
+
+void CMsgReader::readFramebufferUpdateStart()
+{
+  handler->framebufferUpdateStart();
+}
+
+void CMsgReader::readFramebufferUpdateEnd()
+{
+  handler->framebufferUpdateEnd();
+}
+
+void CMsgReader::readRect(const Rect& r, unsigned int encoding)
+{
+  if ((r.br.x > handler->cp.width) || (r.br.y > handler->cp.height)) {
+    fprintf(stderr, "Rect too big: %dx%d at %d,%d exceeds %dx%d\n",
+	    r.width(), r.height(), r.tl.x, r.tl.y,
+            handler->cp.width, handler->cp.height);
+    throw Exception("Rect too big");
+  }
+
+  if (r.is_empty())
+    fprintf(stderr, "Warning: zero size rect\n");
+
+  handler->beginRect(r, encoding);
+
+  if (encoding == encodingCopyRect) {
+    readCopyRect(r);
+  } else {
+    if (!decoders[encoding]) {
+      decoders[encoding] = Decoder::createDecoder(encoding, this);
+      if (!decoders[encoding]) {
+        fprintf(stderr, "Unknown rect encoding %d\n", encoding);
+        throw Exception("Unknown rect encoding");
+      }
+    }
+    decoders[encoding]->readRect(r, handler);
+  }
+
+  handler->endRect(r, encoding);
+}
+
+void CMsgReader::readCopyRect(const Rect& r)
+{
+  int srcX = is->readU16();
+  int srcY = is->readU16();
+  handler->copyRect(r, srcX, srcY);
+}
+
+void CMsgReader::readSetCursor(int width, int height, const Point& hotspot)
+{
+  int data_len = width * height * (handler->cp.pf().bpp/8);
+  int mask_len = ((width+7)/8) * height;
+  rdr::U8Array data(data_len);
+  rdr::U8Array mask(mask_len);
+
+  is->readBytes(data.buf, data_len);
+  is->readBytes(mask.buf, mask_len);
+
+  handler->setCursor(width, height, hotspot, data.buf, mask.buf);
+}
+
+rdr::U8* CMsgReader::getImageBuf(int required, int requested, int* nPixels)
+{
+  int requiredBytes = required * (handler->cp.pf().bpp / 8);
+  int requestedBytes = requested * (handler->cp.pf().bpp / 8);
+  int size = requestedBytes;
+  if (size > imageBufIdealSize) size = imageBufIdealSize;
+
+  if (size < requiredBytes)
+    size = requiredBytes;
+
+  if (imageBufSize < size) {
+    imageBufSize = size;
+    delete [] imageBuf;
+    imageBuf = new rdr::U8[imageBufSize];
+  }
+  if (nPixels)
+    *nPixels = imageBufSize / (handler->cp.pf().bpp / 8);
+  return imageBuf;
+}
+
+int CMsgReader::bpp()
+{
+  return handler->cp.pf().bpp;
+}
diff --git a/common/rfb/CMsgReader.h b/common/rfb/CMsgReader.h
new file mode 100644
index 00000000..7a611fc8
--- /dev/null
+++ b/common/rfb/CMsgReader.h
@@ -0,0 +1,73 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// CMsgReader - class for reading RFB messages on the server side
+// (i.e. messages from client to server).
+//
+
+#ifndef __RFB_CMSGREADER_H__
+#define __RFB_CMSGREADER_H__
+
+#include <rdr/types.h>
+#include <rfb/encodings.h>
+#include <rfb/Decoder.h>
+
+namespace rdr { class InStream; }
+
+namespace rfb {
+  class CMsgHandler;
+  struct Rect;
+
+  class CMsgReader {
+  public:
+    virtual ~CMsgReader();
+
+    virtual void readServerInit()=0;
+
+    // readMsg() reads a message, calling the handler as appropriate.
+    virtual void readMsg()=0;
+
+    rdr::InStream* getInStream() { return is; }
+    rdr::U8* getImageBuf(int required, int requested=0, int* nPixels=0);
+    int bpp();
+
+    int imageBufIdealSize;
+
+  protected:
+    virtual void readSetColourMapEntries();
+    virtual void readBell();
+    virtual void readServerCutText();
+
+    virtual void readFramebufferUpdateStart();
+    virtual void readFramebufferUpdateEnd();
+    virtual void readRect(const Rect& r, unsigned int encoding);
+
+    virtual void readCopyRect(const Rect& r);
+
+    virtual void readSetCursor(int width, int height, const Point& hotspot);
+
+    CMsgReader(CMsgHandler* handler, rdr::InStream* is);
+
+    CMsgHandler* handler;
+    rdr::InStream* is;
+    Decoder* decoders[encodingMax+1];
+    rdr::U8* imageBuf;
+    int imageBufSize;
+  };
+}
+#endif
diff --git a/common/rfb/CMsgReaderV3.cxx b/common/rfb/CMsgReaderV3.cxx
new file mode 100644
index 00000000..d0cfc89f
--- /dev/null
+++ b/common/rfb/CMsgReaderV3.cxx
@@ -0,0 +1,107 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/PixelFormat.h>
+#include <rfb/msgTypes.h>
+#include <rfb/Exception.h>
+#include <rdr/InStream.h>
+#include <rfb/CMsgReaderV3.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/util.h>
+
+using namespace rfb;
+
+CMsgReaderV3::CMsgReaderV3(CMsgHandler* handler, rdr::InStream* is)
+  : CMsgReader(handler, is), nUpdateRectsLeft(0)
+{
+}
+
+CMsgReaderV3::~CMsgReaderV3()
+{
+}
+
+void CMsgReaderV3::readServerInit()
+{
+  int width = is->readU16();
+  int height = is->readU16();
+  handler->setDesktopSize(width, height);
+  PixelFormat pf;
+  pf.read(is);
+  handler->setPixelFormat(pf);
+  CharArray name(is->readString());
+  handler->setName(name.buf);
+  handler->serverInit();
+}
+
+void CMsgReaderV3::readMsg()
+{
+  if (nUpdateRectsLeft == 0) {
+
+    int type = is->readU8();
+    switch (type) {
+    case msgTypeFramebufferUpdate:   readFramebufferUpdate(); break;
+    case msgTypeSetColourMapEntries: readSetColourMapEntries(); break;
+    case msgTypeBell:                readBell(); break;
+    case msgTypeServerCutText:       readServerCutText(); break;
+
+    case msgTypeFileListData:
+    case msgTypeFileDownloadData:
+    case msgTypeFileUploadCancel:
+    case msgTypeFileDownloadFailed:
+    case msgTypeFileDirSizeData:
+    case msgTypeFileLastRequestFailed:
+      handler->processFTMsg(type); break;
+
+    default:
+      fprintf(stderr, "unknown message type %d\n", type);
+      throw Exception("unknown message type");
+    }
+
+  } else {
+
+    int x = is->readU16();
+    int y = is->readU16();
+    int w = is->readU16();
+    int h = is->readU16();
+    unsigned int encoding = is->readU32();
+
+    switch (encoding) {
+    case pseudoEncodingDesktopSize:
+      handler->setDesktopSize(w, h);
+      break;
+    case pseudoEncodingCursor:
+      readSetCursor(w, h, Point(x,y));
+      break;
+    case pseudoEncodingLastRect:
+      nUpdateRectsLeft = 1;     // this rectangle is the last one
+      break;
+    default:
+      readRect(Rect(x, y, x+w, y+h), encoding);
+      break;
+    };
+
+    nUpdateRectsLeft--;
+    if (nUpdateRectsLeft == 0) handler->framebufferUpdateEnd();
+  }
+}
+
+void CMsgReaderV3::readFramebufferUpdate()
+{
+  is->skip(1);
+  nUpdateRectsLeft = is->readU16();
+  handler->framebufferUpdateStart();
+}
diff --git a/common/rfb/CMsgReaderV3.h b/common/rfb/CMsgReaderV3.h
new file mode 100644
index 00000000..689bb650
--- /dev/null
+++ b/common/rfb/CMsgReaderV3.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_CMSGREADERV3_H__
+#define __RFB_CMSGREADERV3_H__
+
+#include <rfb/CMsgReader.h>
+
+namespace rfb {
+  class CMsgReaderV3 : public CMsgReader {
+  public:
+    CMsgReaderV3(CMsgHandler* handler, rdr::InStream* is);
+    virtual ~CMsgReaderV3();
+    virtual void readServerInit();
+    virtual void readMsg();
+  private:
+    void readFramebufferUpdate();
+    int nUpdateRectsLeft;
+  };
+}
+#endif
diff --git a/common/rfb/CMsgWriter.cxx b/common/rfb/CMsgWriter.cxx
new file mode 100644
index 00000000..cdfb4e5f
--- /dev/null
+++ b/common/rfb/CMsgWriter.cxx
@@ -0,0 +1,132 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <rdr/OutStream.h>
+#include <rfb/msgTypes.h>
+#include <rfb/PixelFormat.h>
+#include <rfb/Rect.h>
+#include <rfb/ConnParams.h>
+#include <rfb/Decoder.h>
+#include <rfb/CMsgWriter.h>
+
+using namespace rfb;
+
+CMsgWriter::CMsgWriter(ConnParams* cp_, rdr::OutStream* os_)
+  : cp(cp_), os(os_)
+{
+}
+
+CMsgWriter::~CMsgWriter()
+{
+}
+
+void CMsgWriter::writeSetPixelFormat(const PixelFormat& pf)
+{
+  startMsg(msgTypeSetPixelFormat);                                 
+  os->pad(3);
+  pf.write(os);
+  endMsg();
+}
+
+void CMsgWriter::writeSetEncodings(int nEncodings, rdr::U32* encodings)
+{
+  startMsg(msgTypeSetEncodings);
+  os->skip(1);
+  os->writeU16(nEncodings);
+  for (int i = 0; i < nEncodings; i++)
+    os->writeU32(encodings[i]);
+  endMsg();
+}
+
+// Ask for encodings based on which decoders are supported.  Assumes higher
+// encoding numbers are more desirable.
+
+void CMsgWriter::writeSetEncodings(int preferredEncoding, bool useCopyRect)
+{
+  int nEncodings = 0;
+  rdr::U32 encodings[encodingMax+3];
+  if (cp->supportsLocalCursor)
+    encodings[nEncodings++] = pseudoEncodingCursor;
+  if (cp->supportsDesktopResize)
+    encodings[nEncodings++] = pseudoEncodingDesktopSize;
+  if (Decoder::supported(preferredEncoding)) {
+    encodings[nEncodings++] = preferredEncoding;
+  }
+  if (useCopyRect) {
+    encodings[nEncodings++] = encodingCopyRect;
+  }
+  for (int i = encodingMax; i >= 0; i--) {
+    if (i != preferredEncoding && Decoder::supported(i)) {
+      encodings[nEncodings++] = i;
+    }
+  }
+  encodings[nEncodings++] = pseudoEncodingLastRect;
+  if (cp->customCompressLevel && cp->compressLevel >= 0 && cp->compressLevel <= 9)
+      encodings[nEncodings++] = pseudoEncodingCompressLevel0 + cp->compressLevel;
+  if (!cp->noJpeg && cp->qualityLevel >= 1 && cp->qualityLevel <= 9)
+      encodings[nEncodings++] = pseudoEncodingQualityLevel0 + cp->qualityLevel;
+
+  writeSetEncodings(nEncodings, encodings);
+}
+  
+void CMsgWriter::writeFramebufferUpdateRequest(const Rect& r, bool incremental)
+{
+  startMsg(msgTypeFramebufferUpdateRequest);
+  os->writeU8(incremental);
+  os->writeU16(r.tl.x);
+  os->writeU16(r.tl.y);
+  os->writeU16(r.width());
+  os->writeU16(r.height());
+  endMsg();
+}
+
+
+void CMsgWriter::keyEvent(rdr::U32 key, bool down)
+{
+  startMsg(msgTypeKeyEvent);
+  os->writeU8(down);
+  os->pad(2);
+  os->writeU32(key);
+  endMsg();
+}
+
+
+void CMsgWriter::pointerEvent(const Point& pos, int buttonMask)
+{
+  Point p(pos);
+  if (p.x < 0) p.x = 0;
+  if (p.y < 0) p.y = 0;
+  if (p.x >= cp->width) p.x = cp->width - 1;
+  if (p.y >= cp->height) p.y = cp->height - 1;
+
+  startMsg(msgTypePointerEvent);
+  os->writeU8(buttonMask);
+  os->writeU16(p.x);
+  os->writeU16(p.y);
+  endMsg();
+}
+
+
+void CMsgWriter::clientCutText(const char* str, int len)
+{
+  startMsg(msgTypeClientCutText);
+  os->pad(3);
+  os->writeU32(len);
+  os->writeBytes(str, len);
+  endMsg();
+}
diff --git a/common/rfb/CMsgWriter.h b/common/rfb/CMsgWriter.h
new file mode 100644
index 00000000..19be8df9
--- /dev/null
+++ b/common/rfb/CMsgWriter.h
@@ -0,0 +1,65 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// CMsgWriter - class for writing RFB messages on the server side.
+//
+
+#ifndef __RFB_CMSGWRITER_H__
+#define __RFB_CMSGWRITER_H__
+
+#include <rfb/InputHandler.h>
+
+namespace rdr { class OutStream; }
+
+namespace rfb {
+
+  class PixelFormat;
+  class ConnParams;
+  struct Rect;
+
+  class CMsgWriter : public InputHandler {
+  public:
+    virtual ~CMsgWriter();
+
+    // CMsgWriter abstract interface methods
+    virtual void writeClientInit(bool shared)=0;
+    virtual void startMsg(int type)=0;
+    virtual void endMsg()=0;
+
+    // CMsgWriter implemented methods
+    virtual void writeSetPixelFormat(const PixelFormat& pf);
+    virtual void writeSetEncodings(int nEncodings, rdr::U32* encodings);
+    virtual void writeSetEncodings(int preferredEncoding, bool useCopyRect);
+    virtual void writeFramebufferUpdateRequest(const Rect& r,bool incremental);
+
+    // InputHandler implementation
+    virtual void keyEvent(rdr::U32 key, bool down);
+    virtual void pointerEvent(const Point& pos, int buttonMask);
+    virtual void clientCutText(const char* str, int len);
+
+    ConnParams* getConnParams() { return cp; }
+    rdr::OutStream* getOutStream() { return os; }
+
+  protected:
+    CMsgWriter(ConnParams* cp, rdr::OutStream* os);
+
+    ConnParams* cp;
+    rdr::OutStream* os;
+  };
+}
+#endif
diff --git a/common/rfb/CMsgWriterV3.cxx b/common/rfb/CMsgWriterV3.cxx
new file mode 100644
index 00000000..a9807952
--- /dev/null
+++ b/common/rfb/CMsgWriterV3.cxx
@@ -0,0 +1,49 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/OutStream.h>
+#include <rfb/msgTypes.h>
+#include <rfb/Exception.h>
+#include <rfb/ConnParams.h>
+#include <rfb/CMsgWriterV3.h>
+
+using namespace rfb;
+
+CMsgWriterV3::CMsgWriterV3(ConnParams* cp, rdr::OutStream* os)
+  : CMsgWriter(cp, os)
+{
+}
+
+CMsgWriterV3::~CMsgWriterV3()
+{
+}
+
+void CMsgWriterV3::writeClientInit(bool shared)
+{
+  os->writeU8(shared);
+  endMsg();
+}
+
+void CMsgWriterV3::startMsg(int type)
+{
+  os->writeU8(type);
+}
+
+void CMsgWriterV3::endMsg()
+{
+  os->flush();
+}
diff --git a/common/rfb/CMsgWriterV3.h b/common/rfb/CMsgWriterV3.h
new file mode 100644
index 00000000..0b2f9afe
--- /dev/null
+++ b/common/rfb/CMsgWriterV3.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_CMSGWRITERV3_H__
+#define __RFB_CMSGWRITERV3_H__
+
+#include <rfb/CMsgWriter.h>
+
+namespace rfb {
+  class CMsgWriterV3 : public CMsgWriter {
+  public:
+    CMsgWriterV3(ConnParams* cp, rdr::OutStream* os);
+    virtual ~CMsgWriterV3();
+
+    virtual void writeClientInit(bool shared);
+    virtual void startMsg(int type);
+    virtual void endMsg();
+
+  };
+}
+#endif
diff --git a/common/rfb/CSecurity.h b/common/rfb/CSecurity.h
new file mode 100644
index 00000000..90a01d70
--- /dev/null
+++ b/common/rfb/CSecurity.h
@@ -0,0 +1,52 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// CSecurity - class on the client side for handling security handshaking.  A
+// derived class for a particular security type overrides the processMsg()
+// method.
+
+// processMsg() is called first when the security type has been decided on, and
+// will keep being called whenever there is data to read from the server.  It
+// should return false when it needs more data, or true when the security
+// handshaking is over and we are now waiting for the SecurityResult message
+// from the server.  In the event of failure a suitable exception should be
+// thrown.
+//
+// Note that the first time processMsg() is called, there is no guarantee that
+// there is any data to read from the CConnection's InStream, but subsequent
+// calls guarantee there is at least one byte which can be read without
+// blocking.
+//
+// description is a string describing the level of encryption applied to the
+// session, or null if no encryption will be used.
+
+#ifndef __RFB_CSECURITY_H__
+#define __RFB_CSECURITY_H__
+
+namespace rfb {
+  class CConnection;
+  class CSecurity {
+  public:
+    virtual ~CSecurity() {}
+    virtual bool processMsg(CConnection* cc)=0;
+    virtual void destroy() { delete this; }
+    virtual int getType() const = 0;
+    virtual const char* description() const = 0;
+  };
+}
+#endif
diff --git a/common/rfb/CSecurityNone.h b/common/rfb/CSecurityNone.h
new file mode 100644
index 00000000..54c10168
--- /dev/null
+++ b/common/rfb/CSecurityNone.h
@@ -0,0 +1,36 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// CSecurityNone.h
+//
+
+#ifndef __CSECURITYNONE_H__
+#define __CSECURITYNONE_H__
+
+#include <rfb/CSecurity.h>
+
+namespace rfb {
+
+  class CSecurityNone : public CSecurity {
+  public:
+    virtual bool processMsg(CConnection* cc) { return true; }
+    virtual int getType() const {return secTypeNone;}
+    virtual const char* description() const {return "No Encryption";}
+  };
+}
+#endif
diff --git a/common/rfb/CSecurityVncAuth.cxx b/common/rfb/CSecurityVncAuth.cxx
new file mode 100644
index 00000000..ba5a30b7
--- /dev/null
+++ b/common/rfb/CSecurityVncAuth.cxx
@@ -0,0 +1,74 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// CSecurityVncAuth
+//
+// XXX not thread-safe, because d3des isn't - do we need to worry about this?
+//
+
+#include <string.h>
+#include <stdio.h>
+#include <rfb/CConnection.h>
+#include <rfb/UserPasswdGetter.h>
+#include <rfb/Password.h>
+#include <rfb/CSecurityVncAuth.h>
+#include <rfb/util.h>
+extern "C" {
+#include <rfb/d3des.h>
+}
+
+
+using namespace rfb;
+
+static const int vncAuthChallengeSize = 16;
+
+
+CSecurityVncAuth::CSecurityVncAuth(UserPasswdGetter* upg_)
+  : upg(upg_)
+{
+}
+
+CSecurityVncAuth::~CSecurityVncAuth()
+{
+}
+
+bool CSecurityVncAuth::processMsg(CConnection* cc)
+{
+  rdr::InStream* is = cc->getInStream();
+  rdr::OutStream* os = cc->getOutStream();
+
+  // Read the challenge & obtain the user's password
+  rdr::U8 challenge[vncAuthChallengeSize];
+  is->readBytes(challenge, vncAuthChallengeSize);
+  PlainPasswd passwd;
+  upg->getUserPasswd(0, &passwd.buf);
+
+  // Calculate the correct response
+  rdr::U8 key[8];
+  int pwdLen = strlen(passwd.buf);
+  for (int i=0; i<8; i++)
+    key[i] = i<pwdLen ? passwd.buf[i] : 0;
+  deskey(key, EN0);
+  for (int j = 0; j < vncAuthChallengeSize; j += 8)
+    des(challenge+j, challenge+j);
+
+  // Return the response to the server
+  os->writeBytes(challenge, vncAuthChallengeSize);
+  os->flush();
+  return true;
+}
diff --git a/common/rfb/CSecurityVncAuth.h b/common/rfb/CSecurityVncAuth.h
new file mode 100644
index 00000000..8d38d878
--- /dev/null
+++ b/common/rfb/CSecurityVncAuth.h
@@ -0,0 +1,39 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_CSECURITYVNCAUTH_H__
+#define __RFB_CSECURITYVNCAUTH_H__
+
+#include <rfb/CSecurity.h>
+#include <rfb/secTypes.h>
+
+namespace rfb {
+
+  class UserPasswdGetter;
+
+  class CSecurityVncAuth : public CSecurity {
+  public:
+    CSecurityVncAuth(UserPasswdGetter* pg);
+    virtual ~CSecurityVncAuth();
+    virtual bool processMsg(CConnection* cc);
+    virtual int getType() const {return secTypeVncAuth;};
+    virtual const char* description() const {return "No Encryption";}
+  private:
+    UserPasswdGetter* upg;
+  };
+}
+#endif
diff --git a/common/rfb/ColourCube.h b/common/rfb/ColourCube.h
new file mode 100644
index 00000000..b83cbba8
--- /dev/null
+++ b/common/rfb/ColourCube.h
@@ -0,0 +1,96 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// ColourCube - structure to represent a colour cube.  The colour cube consists
+// of its dimensions (nRed x nGreen x nBlue) and a table mapping an (r,g,b)
+// triple to a pixel value.
+//
+// A colour cube is used in two cases.  The first is internally in a viewer
+// when it cannot use a trueColour format, nor can it have exclusive access to
+// a writable colour map.  This is most notably the case for an X viewer
+// wishing to use a PseudoColor X server's default colormap.
+//
+// The second use is on the server side when a client has asked for a colour
+// map and the server is trueColour.  Instead of setting an uneven trueColour
+// format like bgr233, it can set the client's colour map up with a 6x6x6
+// colour cube.  For this use the colour cube table has a null mapping, which
+// makes it easy to perform the reverse lookup operation from pixel value to
+// r,g,b values.
+
+#ifndef __RFB_COLOURCUBE_H__
+#define __RFB_COLOURCUBE_H__
+
+#include <rfb/Pixel.h>
+#include <rfb/ColourMap.h>
+
+namespace rfb {
+
+  class ColourCube : public ColourMap {
+  public:
+    ColourCube(int nr, int ng, int nb, Pixel* table_=0)
+      : nRed(nr), nGreen(ng), nBlue(nb), table(table_), deleteTable(false)
+    {
+      if (!table) {
+        table = new Pixel[size()];
+        deleteTable = true;
+        // set a null mapping by default
+        for (int i = 0; i < size(); i++)
+          table[i] = i;
+      }
+    }
+
+    ColourCube() : deleteTable(false) {}
+
+    virtual ~ColourCube() {
+      if (deleteTable) delete [] table;
+    }
+
+    void set(int r, int g, int b, Pixel p) {
+      table[(r * nGreen + g) * nBlue + b] = p;
+    }
+
+    Pixel lookup(int r, int g, int b) const {
+      return table[(r * nGreen + g) * nBlue + b];
+    }
+
+    int size()      const { return nRed*nGreen*nBlue; }
+    int redMult()   const { return nGreen*nBlue; }
+    int greenMult() const { return nBlue; }
+    int blueMult()  const { return 1; }
+
+    // ColourMap lookup() method.  Note that this only works when the table has
+    // the default null mapping.
+    virtual void lookup(int i, int* r, int* g, int* b) {
+      if (i >= size()) return;
+      *b = i % nBlue;
+      i /= nBlue;
+      *g = i % nGreen;
+      *r = i / nGreen;
+      *r = (*r * 65535 + (nRed-1)   / 2) / (nRed-1);
+      *g = (*g * 65535 + (nGreen-1) / 2) / (nGreen-1);
+      *b = (*b * 65535 + (nBlue-1)  / 2) / (nBlue-1);
+    }
+
+    int nRed;
+    int nGreen;
+    int nBlue;
+    Pixel* table;
+    bool deleteTable;
+  };
+}
+#endif
diff --git a/common/rfb/ColourMap.h b/common/rfb/ColourMap.h
new file mode 100644
index 00000000..da6cb126
--- /dev/null
+++ b/common/rfb/ColourMap.h
@@ -0,0 +1,34 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_COLOURMAP_H__
+#define __RFB_COLOURMAP_H__
+namespace rfb {
+  struct Colour {
+    Colour() : r(0), g(0), b(0) {}
+    Colour(int r_, int g_, int b_) : r(r_), g(g_), b(b_) {}
+    int r, g, b;
+    bool operator==(const Colour& c) const {return c.r == r && c.g == g && c.b == b;}
+    bool operator!=(const Colour& c) const {return !(c == *this);}
+  };
+
+  class ColourMap {
+  public:
+    virtual void lookup(int index, int* r, int* g, int* b)=0;
+  };
+}
+#endif
diff --git a/common/rfb/ComparingUpdateTracker.cxx b/common/rfb/ComparingUpdateTracker.cxx
new file mode 100644
index 00000000..ce3d68ae
--- /dev/null
+++ b/common/rfb/ComparingUpdateTracker.cxx
@@ -0,0 +1,137 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <vector>
+#include <rdr/types.h>
+#include <rfb/Exception.h>
+#include <rfb/ComparingUpdateTracker.h>
+
+using namespace rfb;
+
+ComparingUpdateTracker::ComparingUpdateTracker(PixelBuffer* buffer)
+  : fb(buffer), oldFb(fb->getPF(), 0, 0), firstCompare(true)
+{
+    changed.assign_union(fb->getRect());
+}
+
+ComparingUpdateTracker::~ComparingUpdateTracker()
+{
+}
+
+
+#define BLOCK_SIZE 16
+
+void ComparingUpdateTracker::compare()
+{
+  std::vector<Rect> rects;
+  std::vector<Rect>::iterator i;
+
+  if (firstCompare) {
+    // NB: We leave the change region untouched on this iteration,
+    // since in effect the entire framebuffer has changed.
+    oldFb.setSize(fb->width(), fb->height());
+    for (int y=0; y<fb->height(); y+=BLOCK_SIZE) {
+      Rect pos(0, y, fb->width(), __rfbmin(fb->height(), y+BLOCK_SIZE));
+      int srcStride;
+      const rdr::U8* srcData = fb->getPixelsR(pos, &srcStride);
+      oldFb.imageRect(pos, srcData, srcStride);
+    }
+    firstCompare = false;
+  } else {
+    copied.get_rects(&rects, copy_delta.x<=0, copy_delta.y<=0);
+    for (i = rects.begin(); i != rects.end(); i++)
+      oldFb.copyRect(*i, copy_delta);
+
+    Region to_check = changed.union_(copied);
+    to_check.get_rects(&rects);
+
+    Region newChanged;
+    for (i = rects.begin(); i != rects.end(); i++)
+      compareRect(*i, &newChanged);
+
+    copied.assign_subtract(newChanged);
+    changed = newChanged;
+  }
+}
+
+void ComparingUpdateTracker::compareRect(const Rect& r, Region* newChanged)
+{
+  if (!r.enclosed_by(fb->getRect())) {
+    fprintf(stderr,"ComparingUpdateTracker: rect outside fb (%d,%d-%d,%d)\n", r.tl.x, r.tl.y, r.br.x, r.br.y);
+    return;
+  }
+
+  int bytesPerPixel = fb->getPF().bpp/8;
+  int oldStride;
+  rdr::U8* oldData = oldFb.getPixelsRW(r, &oldStride);
+  int oldStrideBytes = oldStride * bytesPerPixel;
+
+  std::vector<Rect> changedBlocks;
+
+  for (int blockTop = r.tl.y; blockTop < r.br.y; blockTop += BLOCK_SIZE)
+  {
+    // Get a strip of the source buffer
+    Rect pos(r.tl.x, blockTop, r.br.x, __rfbmin(r.br.y, blockTop+BLOCK_SIZE));
+    int fbStride;
+    const rdr::U8* newBlockPtr = fb->getPixelsR(pos, &fbStride);
+    int newStrideBytes = fbStride * bytesPerPixel;
+
+    rdr::U8* oldBlockPtr = oldData;
+    int blockBottom = __rfbmin(blockTop+BLOCK_SIZE, r.br.y);
+
+    for (int blockLeft = r.tl.x; blockLeft < r.br.x; blockLeft += BLOCK_SIZE)
+    {
+      const rdr::U8* newPtr = newBlockPtr;
+      rdr::U8* oldPtr = oldBlockPtr;
+
+      int blockRight = __rfbmin(blockLeft+BLOCK_SIZE, r.br.x);
+      int blockWidthInBytes = (blockRight-blockLeft) * bytesPerPixel;
+
+      for (int y = blockTop; y < blockBottom; y++)
+      {
+        if (memcmp(oldPtr, newPtr, blockWidthInBytes) != 0)
+        {
+          // A block has changed - copy the remainder to the oldFb
+          changedBlocks.push_back(Rect(blockLeft, blockTop,
+                                       blockRight, blockBottom));
+          for (int y2 = y; y2 < blockBottom; y2++)
+          {
+            memcpy(oldPtr, newPtr, blockWidthInBytes);
+            newPtr += newStrideBytes;
+            oldPtr += oldStrideBytes;
+          }
+          break;
+        }
+
+        newPtr += newStrideBytes;
+        oldPtr += oldStrideBytes;
+      }
+
+      oldBlockPtr += blockWidthInBytes;
+      newBlockPtr += blockWidthInBytes;
+    }
+
+    oldData += oldStrideBytes * BLOCK_SIZE;
+  }
+
+  if (!changedBlocks.empty()) {
+    Region temp;
+    temp.setOrderedRects(changedBlocks);
+    newChanged->assign_union(temp);
+  }
+}
diff --git a/common/rfb/ComparingUpdateTracker.h b/common/rfb/ComparingUpdateTracker.h
new file mode 100644
index 00000000..5d2e5edf
--- /dev/null
+++ b/common/rfb/ComparingUpdateTracker.h
@@ -0,0 +1,43 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RFB_COMPARINGUPDATETRACKER_H__
+#define __RFB_COMPARINGUPDATETRACKER_H__
+
+#include <rfb/UpdateTracker.h>
+
+namespace rfb {
+
+  class ComparingUpdateTracker : public SimpleUpdateTracker {
+  public:
+    ComparingUpdateTracker(PixelBuffer* buffer);
+    ~ComparingUpdateTracker();
+
+    // compare() does the comparison and reduces its changed and copied regions
+    // as appropriate.
+
+    virtual void compare();
+  private:
+    void compareRect(const Rect& r, Region* newchanged);
+    PixelBuffer* fb;
+    ManagedPixelBuffer oldFb;
+    bool firstCompare;
+  };
+
+}
+#endif
diff --git a/common/rfb/Configuration.cxx b/common/rfb/Configuration.cxx
new file mode 100644
index 00000000..9ebc20a8
--- /dev/null
+++ b/common/rfb/Configuration.cxx
@@ -0,0 +1,466 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * Copyright (C) 2004-2005 Cendio AB. All rights reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Configuration.cxx
+
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <assert.h>
+#ifdef WIN32
+#define strcasecmp _stricmp
+#define strncasecmp _strnicmp
+#endif
+
+#include <rfb/util.h>
+#include <rfb/Configuration.h>
+#include <rfb/LogWriter.h>
+#include <rfb/Exception.h>
+#include <rfb/Threading.h>
+
+#ifdef __RFB_THREADING_IMPL
+// On platforms that support Threading, we use Locks to make getData safe
+#define LOCK_CONFIG Lock l(*configLock())
+rfb::Mutex* configLock_ = 0;
+static rfb::Mutex* configLock() {
+  if (!configLock_)
+    configLock_ = new rfb::Mutex;
+  return configLock_;
+}
+#else
+#define LOCK_CONFIG
+#endif
+
+#include <rdr/HexOutStream.h>
+#include <rdr/HexInStream.h>
+
+using namespace rfb;
+
+static LogWriter vlog("Config");
+
+
+// -=- The Global Configuration object
+Configuration* Configuration::global_ = 0;
+Configuration* Configuration::global() {
+  if (!global_)
+    global_ = new Configuration("Global");
+  return global_;
+}
+
+
+// -=- Configuration implementation
+
+Configuration::Configuration(const char* name_, Configuration* attachToGroup) 
+: name(strDup(name_)), head(0), _next(0) {
+  if (attachToGroup) {
+    _next = attachToGroup->_next;
+    attachToGroup->_next = this;
+  }
+}
+
+Configuration& Configuration::operator=(const Configuration& src) {
+  VoidParameter* current = head;
+  while (current) {
+    VoidParameter* srcParam = ((Configuration&)src).get(current->getName());
+    if (srcParam) {
+      current->immutable = false;
+      CharArray value(srcParam->getValueStr());
+      vlog.debug("operator=(%s, %s)", current->getName(), value.buf);
+      current->setParam(value.buf);
+    }
+    current = current->_next;
+  }
+  if (_next)
+    *_next=src;
+  return *this;
+}
+
+bool Configuration::set(const char* n, const char* v, bool immutable) {
+  return set(n, strlen(n), v, immutable);
+}
+
+bool Configuration::set(const char* name, int len,
+                             const char* val, bool immutable)
+{
+  VoidParameter* current = head;
+  while (current) {
+    if ((int)strlen(current->getName()) == len &&
+        strncasecmp(current->getName(), name, len) == 0)
+    {
+      bool b = current->setParam(val);
+      current->setHasBeenSet(); 
+      if (b && immutable) 
+	current->setImmutable();
+      return b;
+    }
+    current = current->_next;
+  }
+  return _next ? _next->set(name, len, val, immutable) : false;
+}
+
+bool Configuration::set(const char* config, bool immutable) {
+  bool hyphen = false;
+  if (config[0] == '-') {
+    hyphen = true;
+    config++;
+    if (config[0] == '-') config++; // allow gnu-style --<option>
+  }
+  const char* equal = strchr(config, '=');
+  if (equal) {
+    return set(config, equal-config, equal+1, immutable);
+  } else if (hyphen) {
+    VoidParameter* current = head;
+    while (current) {
+      if (strcasecmp(current->getName(), config) == 0) {
+        bool b = current->setParam();
+	current->setHasBeenSet(); 
+        if (b && immutable) 
+	  current->setImmutable();
+        return b;
+      }
+      current = current->_next;
+    }
+  }    
+  return _next ? _next->set(config, immutable) : false;
+}
+
+VoidParameter* Configuration::get(const char* param)
+{
+  VoidParameter* current = head;
+  while (current) {
+    if (strcasecmp(current->getName(), param) == 0)
+      return current;
+    current = current->_next;
+  }
+  return _next ? _next->get(param) : 0;
+}
+
+void Configuration::list(int width, int nameWidth) {
+  VoidParameter* current = head;
+
+  fprintf(stderr, "%s Parameters:\n", name.buf);
+  while (current) {
+    char* def_str = current->getDefaultStr();
+    const char* desc = current->getDescription();
+    fprintf(stderr,"  %-*s -", nameWidth, current->getName());
+    int column = strlen(current->getName());
+    if (column < nameWidth) column = nameWidth;
+    column += 4;
+    while (true) {
+      const char* s = strchr(desc, ' ');
+      int wordLen;
+      if (s) wordLen = s-desc;
+      else wordLen = strlen(desc);
+
+      if (column + wordLen + 1 > width) {
+        fprintf(stderr,"\n%*s",nameWidth+4,"");
+        column = nameWidth+4;
+      }
+      fprintf(stderr," %.*s",wordLen,desc);
+      column += wordLen + 1;
+      desc += wordLen + 1;
+      if (!s) break;
+    }
+
+    if (def_str) {
+      if (column + (int)strlen(def_str) + 11 > width)
+        fprintf(stderr,"\n%*s",nameWidth+4,"");
+      fprintf(stderr," (default=%s)\n",def_str);
+      strFree(def_str);
+    } else {
+      fprintf(stderr,"\n");
+    }
+    current = current->_next;
+  }
+
+  if (_next)
+    _next->list(width, nameWidth);
+}
+
+
+// -=- VoidParameter
+
+VoidParameter::VoidParameter(const char* name_, const char* desc_, Configuration* conf)
+  : immutable(false), _hasBeenSet(false), name(name_), description(desc_) {
+  if (!conf)
+    conf = Configuration::global();
+  _next = conf->head;
+  conf->head = this;
+}
+
+VoidParameter::~VoidParameter() {
+}
+
+const char*
+VoidParameter::getName() const {
+  return name;
+}
+
+const char*
+VoidParameter::getDescription() const {
+  return description;
+}
+
+bool VoidParameter::setParam() {
+  return false;
+}
+
+bool VoidParameter::isBool() const {
+  return false;
+}
+
+void
+VoidParameter::setImmutable() {
+  vlog.debug("set immutable %s", getName());
+  immutable = true;
+}
+
+void
+VoidParameter::setHasBeenSet() {
+  _hasBeenSet = true;
+} 
+
+bool
+VoidParameter::hasBeenSet() {
+  return _hasBeenSet;
+}
+
+// -=- AliasParameter
+
+AliasParameter::AliasParameter(const char* name_, const char* desc_,
+                               VoidParameter* param_, Configuration* conf)
+  : VoidParameter(name_, desc_, conf), param(param_) {
+}
+
+bool
+AliasParameter::setParam(const char* v) {
+  return param->setParam(v);
+}
+
+bool AliasParameter::setParam() {
+  return param->setParam();
+}
+
+char*
+AliasParameter::getDefaultStr() const {
+  return 0;
+}
+
+char* AliasParameter::getValueStr() const {
+  return param->getValueStr();
+}
+
+bool AliasParameter::isBool() const {
+  return param->isBool();
+}
+
+void
+AliasParameter::setImmutable() {
+  vlog.debug("set immutable %s (Alias)", getName());
+  param->setImmutable();
+}
+
+
+// -=- BoolParameter
+
+BoolParameter::BoolParameter(const char* name_, const char* desc_, bool v, Configuration* conf)
+: VoidParameter(name_, desc_, conf), value(v), def_value(v) {
+}
+
+bool
+BoolParameter::setParam(const char* v) {
+  if (immutable) return true;
+
+  if (*v == 0 || strcasecmp(v, "1") == 0 || strcasecmp(v, "on") == 0
+      || strcasecmp(v, "true") == 0 || strcasecmp(v, "yes") == 0)
+    value = 1;
+  else if (strcasecmp(v, "0") == 0 || strcasecmp(v, "off") == 0
+           || strcasecmp(v, "false") == 0 || strcasecmp(v, "no") == 0)
+    value = 0;
+  else {
+    vlog.error("Bool parameter %s: invalid value '%s'", getName(), v);
+    return false;
+  }
+
+  vlog.debug("set %s(Bool) to %s(%d)", getName(), v, value);
+  return true;
+}
+
+bool BoolParameter::setParam() {
+  setParam(true);
+  return true;
+}
+
+void BoolParameter::setParam(bool b) {
+  if (immutable) return;
+  value = b;
+  vlog.debug("set %s(Bool) to %d", getName(), value);
+}
+
+char*
+BoolParameter::getDefaultStr() const {
+  return strDup(def_value ? "1" : "0");
+}
+
+char* BoolParameter::getValueStr() const {
+  return strDup(value ? "1" : "0");
+}
+
+bool BoolParameter::isBool() const {
+  return true;
+}
+
+BoolParameter::operator bool() const {
+  return value;
+}
+
+// -=- IntParameter
+
+IntParameter::IntParameter(const char* name_, const char* desc_, int v,
+                           int minValue_, int maxValue_, Configuration* conf)
+  : VoidParameter(name_, desc_, conf), value(v), def_value(v),
+    minValue(minValue_), maxValue(maxValue_)
+{
+}
+
+bool
+IntParameter::setParam(const char* v) {
+  if (immutable) return true;
+  vlog.debug("set %s(Int) to %s", getName(), v);
+  int i = atoi(v);
+  if (i < minValue || i > maxValue)
+    return false;
+  value = i;
+  return true;
+}
+
+bool
+IntParameter::setParam(int v) {
+  if (immutable) return true;
+  vlog.debug("set %s(Int) to %d", getName(), v);
+  if (v < minValue || v > maxValue)
+    return false;
+  value = v;
+  return true;
+}
+
+char*
+IntParameter::getDefaultStr() const {
+  char* result = new char[16];
+  sprintf(result, "%d", def_value);
+  return result;
+}
+
+char* IntParameter::getValueStr() const {
+  char* result = new char[16];
+  sprintf(result, "%d", value);
+  return result;
+}
+
+IntParameter::operator int() const {
+  return value;
+}
+
+// -=- StringParameter
+
+StringParameter::StringParameter(const char* name_, const char* desc_,
+                                 const char* v, Configuration* conf)
+  : VoidParameter(name_, desc_, conf), value(strDup(v)), def_value(v)
+{
+  if (!v) {
+    fprintf(stderr,"Default value <null> for %s not allowed\n",name_);
+    throw rfb::Exception("Default value <null> not allowed");
+  }
+}
+
+StringParameter::~StringParameter() {
+  strFree(value);
+}
+
+bool StringParameter::setParam(const char* v) {
+  LOCK_CONFIG;
+  if (immutable) return true;
+  if (!v)
+    throw rfb::Exception("setParam(<null>) not allowed");
+  vlog.debug("set %s(String) to %s", getName(), v);
+  CharArray oldValue(value);
+  value = strDup(v);
+  return value != 0;
+}
+
+char* StringParameter::getDefaultStr() const {
+  return strDup(def_value);
+}
+
+char* StringParameter::getValueStr() const {
+  LOCK_CONFIG;
+  return strDup(value);
+}
+
+// -=- BinaryParameter
+
+BinaryParameter::BinaryParameter(const char* name_, const char* desc_, const void* v, int l, Configuration* conf)
+: VoidParameter(name_, desc_, conf), value(0), length(0), def_value((char*)v), def_length(l) {
+  if (l) {
+    value = new char[l];
+    length = l;
+    memcpy(value, v, l);
+  }
+}
+BinaryParameter::~BinaryParameter() {
+  if (value)
+    delete [] value;
+}
+
+bool BinaryParameter::setParam(const char* v) {
+  LOCK_CONFIG;
+  if (immutable) return true;
+  vlog.debug("set %s(Binary) to %s", getName(), v);
+  return rdr::HexInStream::hexStrToBin(v, &value, &length);
+}
+
+void BinaryParameter::setParam(const void* v, int len) {
+  LOCK_CONFIG;
+  if (immutable) return; 
+  vlog.debug("set %s(Binary)", getName());
+  delete [] value; value = 0;
+  if (len) {
+    value = new char[len];
+    length = len;
+    memcpy(value, v, len);
+  }
+}
+
+char* BinaryParameter::getDefaultStr() const {
+  return rdr::HexOutStream::binToHexStr(def_value, def_length);
+}
+
+char* BinaryParameter::getValueStr() const {
+  LOCK_CONFIG;
+  return rdr::HexOutStream::binToHexStr(value, length);
+}
+
+void BinaryParameter::getData(void** data_, int* length_) const {
+  LOCK_CONFIG;
+  if (length_) *length_ = length;
+  if (data_) {
+    *data_ = new char[length];
+    memcpy(*data_, value, length);
+  }
+}
diff --git a/common/rfb/Configuration.h b/common/rfb/Configuration.h
new file mode 100644
index 00000000..e3b85b83
--- /dev/null
+++ b/common/rfb/Configuration.h
@@ -0,0 +1,265 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Configuration.h
+//
+// This header defines a set of classes used to represent configuration
+// parameters of different types.  Instances of the different parameter
+// types are associated with instances of the Configuration class, and
+// are each given a unique name.  The Configuration class provides a
+// generic API through which parameters may be located by name and their
+// value set, thus removing the need to write platform-specific code.
+// Simply defining a new parameter and associating it with a Configuration
+// will allow it to be configured by the user.
+//
+// If no Configuration is specified when creating a Parameter, then the
+// global Configuration will be assumed.
+//
+// Configurations can be "chained" into groups.  Each group has a root
+// Configuration, a pointer to which should be passed to the constructors
+// of the other group members.  set() and get() operations called on the
+// root will iterate through all of the group's members.
+//
+// NB: On platforms that support Threading, locking is performed to protect
+//     complex parameter types from concurrent access (e.g. strings).
+// NB: NO LOCKING is performed when linking Configurations to groups
+//     or when adding Parameters to Configurations.
+
+#ifndef __RFB_CONFIGURATION_H__
+#define __RFB_CONFIGURATION_H__
+
+#include <rfb/util.h>
+
+namespace rfb {
+  class VoidParameter;
+  struct ParameterIterator;
+
+  // -=- Configuration
+  //     Class used to access parameters.
+
+  class Configuration {
+  public:
+    // - Create a new Configuration object
+    Configuration(const char* name, Configuration* attachToGroup=0);
+
+    // - Return the buffer containing the Configuration's name
+    const char* getName() const { return name.buf; }
+
+    // - Assignment operator.  For every Parameter in this Configuration's
+    //   group, get()s the corresponding source parameter and copies its
+    //   content.
+    Configuration& operator=(const Configuration& src);
+
+    // - Set named parameter to value
+    bool set(const char* param, const char* value, bool immutable=false);
+
+    // - Set parameter to value (separated by "=")
+    bool set(const char* config, bool immutable=false);
+
+    // - Set named parameter to value, with name truncated at len
+    bool set(const char* name, int len,
+                  const char* val, bool immutable);
+
+    // - Get named parameter
+    VoidParameter* get(const char* param);
+
+    // - List the parameters of this Configuration group
+    void list(int width=79, int nameWidth=10);
+
+    // - readFromFile
+    //   Read configuration parameters from the specified file.
+    void readFromFile(const char* filename);
+
+    // - writeConfigToFile
+    //   Write a new configuration parameters file, then mv it
+    //   over the old file.
+    void writeToFile(const char* filename);
+
+
+    // - Get the Global Configuration object
+    //   NB: This call does NOT lock the Configuration system.
+    //       ALWAYS ensure that if you have ANY global Parameters,
+    //       then they are defined as global objects, to ensure that
+    //       global() is called when only the main thread is running.
+    static Configuration* global();
+
+    // - Container for process-wide Global parameters
+    static bool setParam(const char* param, const char* value, bool immutable=false) {
+      return global()->set(param, value, immutable);
+    }
+    static bool setParam(const char* config, bool immutable=false) { 
+      return global()->set(config, immutable);
+    }
+    static bool setParam(const char* name, int len,
+      const char* val, bool immutable) {
+      return global()->set(name, len, val, immutable);
+    }
+    static VoidParameter* getParam(const char* param) { return global()->get(param); }
+    static void listParams(int width=79, int nameWidth=10) { global()->list(width, nameWidth); }
+
+  protected:
+    friend class VoidParameter;
+    friend struct ParameterIterator;
+
+    // Name for this Configuration
+    CharArray name;
+
+    // - Pointer to first Parameter in this group
+    VoidParameter* head;
+
+    // Pointer to next Configuration in this group
+    Configuration* _next;
+
+    // The process-wide, Global Configuration object
+    static Configuration* global_;
+  };
+
+  // -=- VoidParameter
+  //     Configuration parameter base-class.
+
+  class VoidParameter {
+  public:
+    VoidParameter(const char* name_, const char* desc_, Configuration* conf=0);
+    virtual  ~VoidParameter();
+    const char* getName() const;
+    const char* getDescription() const;
+
+    virtual bool setParam(const char* value)  = 0;
+    virtual bool setParam();
+    virtual char* getDefaultStr() const = 0;
+    virtual char* getValueStr() const = 0;
+    virtual bool isBool() const;
+
+    virtual void setImmutable();
+    virtual void setHasBeenSet();
+    bool hasBeenSet();
+
+  protected:
+    friend class Configuration;
+    friend struct ParameterIterator;
+
+    VoidParameter* _next;
+    bool immutable;
+    bool _hasBeenSet;
+    const char* name;
+    const char* description;
+  };
+
+  class AliasParameter : public VoidParameter {
+  public:
+    AliasParameter(const char* name_, const char* desc_,VoidParameter* param_, Configuration* conf=0);
+    virtual bool setParam(const char* value);
+    virtual bool setParam();
+    virtual char* getDefaultStr() const;
+    virtual char* getValueStr() const;
+    virtual bool isBool() const;
+    virtual void setImmutable();
+  private:
+    VoidParameter* param;
+  };
+
+  class BoolParameter : public VoidParameter {
+  public:
+    BoolParameter(const char* name_, const char* desc_, bool v, Configuration* conf=0);
+    virtual bool setParam(const char* value);
+    virtual bool setParam();
+    virtual void setParam(bool b);
+    virtual char* getDefaultStr() const;
+    virtual char* getValueStr() const;
+    virtual bool isBool() const;
+    operator bool() const;
+  protected:
+    bool value;
+    bool def_value;
+  };
+
+  class IntParameter : public VoidParameter {
+  public:
+    IntParameter(const char* name_, const char* desc_, int v,
+                 int minValue=INT_MIN, int maxValue=INT_MAX, Configuration* conf=0);
+    virtual bool setParam(const char* value);
+    virtual bool setParam(int v);
+    virtual char* getDefaultStr() const;
+    virtual char* getValueStr() const;
+    operator int() const;
+  protected:
+    int value;
+    int def_value;
+    int minValue, maxValue;
+  };
+
+  class StringParameter : public VoidParameter {
+  public:
+    // StringParameter contains a null-terminated string, which CANNOT
+    // be Null, and so neither can the default value!
+    StringParameter(const char* name_, const char* desc_, const char* v, Configuration* conf=0);
+    virtual ~StringParameter();
+    virtual bool setParam(const char* value);
+    virtual char* getDefaultStr() const;
+    virtual char* getValueStr() const;
+
+    // getData() returns a copy of the data - it must be delete[]d by the
+    // caller.
+    char* getData() const { return getValueStr(); }
+  protected:
+    char* value;
+    const char* def_value;
+  };
+
+  class BinaryParameter : public VoidParameter {
+  public:
+    BinaryParameter(const char* name_, const char* desc_, const void* v, int l, Configuration* conf=0);
+    virtual ~BinaryParameter();
+    virtual bool setParam(const char* value);
+    virtual void setParam(const void* v, int l);
+    virtual char* getDefaultStr() const;
+    virtual char* getValueStr() const;
+
+    // getData() will return length zero if there is no data
+    // NB: data may be set to zero, OR set to a zero-length buffer
+    void getData(void** data, int* length) const;
+
+  protected:
+    char* value;
+    int length;
+    char* def_value;
+    int def_length;
+  };
+
+  // -=- ParameterIterator
+  //     Iterates over all the Parameters in a Configuration group.  The
+  //     current Parameter is accessed via param, the current Configuration
+  //     via config.  The next() method moves on to the next Parameter.
+
+  struct ParameterIterator {
+    ParameterIterator(Configuration* c) : config(c), param(c ? c->head : 0) {}
+    void next() {
+      param = param->_next;
+      while (!param) {
+        config = config->_next;
+        if (!config) break;
+        param = config->head;
+      }
+    }
+    Configuration* config;
+    VoidParameter* param;
+  };
+
+};
+
+#endif // __RFB_CONFIGURATION_H__
diff --git a/common/rfb/ConnParams.cxx b/common/rfb/ConnParams.cxx
new file mode 100644
index 00000000..d4ae5894
--- /dev/null
+++ b/common/rfb/ConnParams.cxx
@@ -0,0 +1,125 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/InStream.h>
+#include <rdr/OutStream.h>
+#include <rfb/Exception.h>
+#include <rfb/encodings.h>
+#include <rfb/Encoder.h>
+#include <rfb/ConnParams.h>
+#include <rfb/util.h>
+
+using namespace rfb;
+
+ConnParams::ConnParams()
+  : majorVersion(0), minorVersion(0), width(0), height(0), useCopyRect(false),
+    supportsLocalCursor(false), supportsLocalXCursor(false), supportsDesktopResize(true),
+    supportsLastRect(false), customCompressLevel(false), compressLevel(6),
+    noJpeg(false), qualityLevel(-1), 
+    name_(0), nEncodings_(0), encodings_(0),
+    currentEncoding_(encodingRaw), verStrPos(0)
+{
+  setName("");
+}
+
+ConnParams::~ConnParams()
+{
+  delete [] name_;
+  delete [] encodings_;
+}
+
+bool ConnParams::readVersion(rdr::InStream* is, bool* done)
+{
+  if (verStrPos >= 12) return false;
+  while (is->checkNoWait(1) && verStrPos < 12) {
+    verStr[verStrPos++] = is->readU8();
+  }
+
+  if (verStrPos < 12) {
+    *done = false;
+    return true;
+  }
+  *done = true;
+  verStr[12] = 0;
+  return (sscanf(verStr, "RFB %03d.%03d\n", &majorVersion,&minorVersion) == 2);
+}
+
+void ConnParams::writeVersion(rdr::OutStream* os)
+{
+  char str[13];
+  sprintf(str, "RFB %03d.%03d\n", majorVersion, minorVersion);
+  os->writeBytes(str, 12);
+  os->flush();
+}
+
+void ConnParams::setPF(const PixelFormat& pf)
+{
+  pf_ = pf;
+
+  if (pf.bpp != 8 && pf.bpp != 16 && pf.bpp != 32)
+    throw Exception("setPF: not 8, 16 or 32 bpp?");
+}
+
+void ConnParams::setName(const char* name)
+{
+  delete [] name_;
+  name_ = strDup(name);
+}
+
+void ConnParams::setEncodings(int nEncodings, const rdr::U32* encodings)
+{
+  if (nEncodings > nEncodings_) {
+    delete [] encodings_;
+    encodings_ = new rdr::U32[nEncodings];
+  }
+  nEncodings_ = nEncodings;
+  useCopyRect = false;
+  supportsLocalCursor = false;
+  supportsDesktopResize = false;
+  supportsLocalXCursor = false;
+  supportsLastRect = false;
+  customCompressLevel = false;
+  compressLevel = -1;
+  noJpeg = true;
+  qualityLevel = -1;
+  currentEncoding_ = encodingRaw;
+
+  for (int i = nEncodings-1; i >= 0; i--) {
+    encodings_[i] = encodings[i];
+
+    if (encodings[i] == encodingCopyRect)
+      useCopyRect = true;
+    else if (encodings[i] == pseudoEncodingCursor)
+      supportsLocalCursor = true;
+    else if (encodings[i] == pseudoEncodingXCursor)
+      supportsLocalXCursor = true;
+    else if (encodings[i] == pseudoEncodingDesktopSize)
+      supportsDesktopResize = true;
+    else if (encodings[i] == pseudoEncodingLastRect)
+      supportsLastRect = true;
+    else if (encodings[i] >= pseudoEncodingCompressLevel0 &&
+	     encodings[i] <= pseudoEncodingCompressLevel9) {
+      customCompressLevel = true;
+      compressLevel = encodings[i] - pseudoEncodingCompressLevel0;
+    } else if (encodings[i] >= pseudoEncodingQualityLevel0 &&
+	       encodings[i] <= pseudoEncodingQualityLevel9) {
+      noJpeg = false;
+      qualityLevel = encodings[i] - pseudoEncodingQualityLevel0;
+    } else if (encodings[i] <= encodingMax && Encoder::supported(encodings[i]))
+      currentEncoding_ = encodings[i];
+  }
+}
diff --git a/common/rfb/ConnParams.h b/common/rfb/ConnParams.h
new file mode 100644
index 00000000..47e6a5fb
--- /dev/null
+++ b/common/rfb/ConnParams.h
@@ -0,0 +1,93 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// ConnParams - structure containing the connection parameters.
+//
+
+#ifndef __RFB_CONNPARAMS_H__
+#define __RFB_CONNPARAMS_H__
+
+#include <rdr/types.h>
+#include <rfb/PixelFormat.h>
+
+namespace rdr { class InStream; }
+
+namespace rfb {
+
+  class ConnParams {
+  public:
+    ConnParams();
+    ~ConnParams();
+
+    bool readVersion(rdr::InStream* is, bool* done);
+    void writeVersion(rdr::OutStream* os);
+
+    int majorVersion;
+    int minorVersion;
+
+    void setVersion(int major, int minor) {
+      majorVersion = major; minorVersion = minor;
+    }
+    bool isVersion(int major, int minor) {
+      return majorVersion == major && minorVersion == minor;
+    }
+    bool beforeVersion(int major, int minor) {
+      return (majorVersion < major ||
+              (majorVersion == major && minorVersion < minor));
+    }
+    bool afterVersion(int major, int minor) {
+      return !beforeVersion(major,minor+1);
+    }
+
+    int width;
+    int height;
+
+    const PixelFormat& pf() { return pf_; }
+    void setPF(const PixelFormat& pf);
+
+    const char* name() { return name_; }
+    void setName(const char* name);
+
+    rdr::U32 currentEncoding() { return currentEncoding_; }
+    int nEncodings() { return nEncodings_; }
+    const rdr::U32* encodings() { return encodings_; }
+    void setEncodings(int nEncodings, const rdr::U32* encodings);
+    bool useCopyRect;
+
+    bool supportsLocalCursor;
+    bool supportsLocalXCursor;
+    bool supportsDesktopResize;
+    bool supportsLastRect;
+
+    bool customCompressLevel;
+    int compressLevel;
+    bool noJpeg;
+    int qualityLevel;
+
+  private:
+
+    PixelFormat pf_;
+    char* name_;
+    int nEncodings_;
+    rdr::U32* encodings_;
+    int currentEncoding_;
+    char verStr[13];
+    int verStrPos;
+  };
+}
+#endif
diff --git a/common/rfb/Cursor.cxx b/common/rfb/Cursor.cxx
new file mode 100644
index 00000000..c8dc341b
--- /dev/null
+++ b/common/rfb/Cursor.cxx
@@ -0,0 +1,179 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <string.h>
+#include <rfb/Cursor.h>
+#include <rfb/LogWriter.h>
+
+using namespace rfb;
+
+static LogWriter vlog("Cursor");
+
+void Cursor::setSize(int w, int h) {
+  int oldMaskLen = maskLen();
+  ManagedPixelBuffer::setSize(w, h);
+  if (maskLen() > oldMaskLen) {
+    delete [] mask.buf;
+    mask.buf = new rdr::U8[maskLen()];
+  }
+}
+
+void Cursor::drawOutline(const Pixel& c)
+{
+  Cursor outlined;
+
+  // Create a mirror of the existing cursor
+  outlined.setPF(getPF());
+  outlined.setSize(width(), height());
+  outlined.hotspot = hotspot;
+
+  // Clear the mirror's background to the outline colour
+  outlined.fillRect(getRect(), c);
+
+  // Blit the existing cursor, using its mask
+  outlined.maskRect(getRect(), data, mask.buf);
+
+  // Now just adjust the mask to add the outline.  The outline pixels
+  // will already be the right colour. :)
+  int maskBytesPerRow = (width() + 7) / 8;
+  for (int y = 0; y < height(); y++) {
+    for (int byte=0; byte<maskBytesPerRow; byte++) {
+      rdr::U8 m8 = mask.buf[y*maskBytesPerRow + byte];
+
+      // Handle above & below outline
+      if (y > 0) m8 |= mask.buf[(y-1)*maskBytesPerRow + byte];
+      if (y < height()-1) m8 |= mask.buf[(y+1)*maskBytesPerRow + byte];
+
+      // Left outline
+      m8 |= mask.buf[y*maskBytesPerRow + byte] << 1;
+      if (byte < maskBytesPerRow-1)
+        m8 |= (mask.buf[y*maskBytesPerRow + byte + 1] >> 7) & 1;
+
+      // Right outline
+      m8 |= mask.buf[y*maskBytesPerRow + byte] >> 1;
+      if (byte > 0)
+        m8 |= (mask.buf[y*maskBytesPerRow + byte - 1] << 7) & 128;
+
+      outlined.mask.buf[y*maskBytesPerRow + byte] = m8;
+    }
+  }
+
+  // Replace the existing cursor & mask with the new one
+  delete [] data;
+  delete [] mask.buf;
+  data = outlined.data; outlined.data = 0;
+  mask.buf = outlined.mask.buf; outlined.mask.buf = 0;
+}
+
+rdr::U8* Cursor::getBitmap(Pixel* pix0, Pixel* pix1)
+{
+  bool gotPix0 = false;
+  bool gotPix1 = false;
+  *pix0 = *pix1 = 0;
+  rdr::U8Array source(maskLen());
+  memset(source.buf, 0, maskLen());
+
+  int maskBytesPerRow = (width() + 7) / 8;
+  for (int y = 0; y < height(); y++) {
+    for (int x = 0; x < width(); x++) {
+      int byte = y * maskBytesPerRow + x / 8;
+      int bit = 7 - x % 8;
+      if (mask.buf[byte] & (1 << bit)) {
+        Pixel pix=0;
+        switch (getPF().bpp) {
+        case 8:  pix = ((rdr::U8*) data)[y * width() + x]; break;
+        case 16: pix = ((rdr::U16*)data)[y * width() + x]; break;
+        case 32: pix = ((rdr::U32*)data)[y * width() + x]; break;
+        }
+        if (!gotPix0 || pix == *pix0) {
+          gotPix0 = true;
+          *pix0 = pix;
+        } else if (!gotPix1 || pix == *pix1) {
+          gotPix1 = true;
+          *pix1 = pix;
+          source.buf[byte] |= (1 << bit);
+        } else {
+          // not a bitmap
+          return 0;
+        }
+      }
+    }
+  }
+  return source.takeBuf();
+}
+
+// crop() determines the "busy" rectangle for the cursor - the minimum bounding
+// rectangle containing actual pixels.  This isn't the most efficient algorithm
+// but it's short.  For sanity, we make sure that the busy rectangle always
+// includes the hotspot (the hotspot is unsigned on the wire so otherwise it
+// would cause problems if it was above or left of the actual pixels)
+
+void Cursor::crop()
+{
+  Rect busy = getRect().intersect(Rect(hotspot.x, hotspot.y,
+                                       hotspot.x+1, hotspot.y+1));
+  int maskBytesPerRow = (width() + 7) / 8;
+  int x, y;
+  for (y = 0; y < height(); y++) {
+    for (x = 0; x < width(); x++) {
+      int byte = y * maskBytesPerRow + x / 8;
+      int bit = 7 - x % 8;
+      if (mask.buf[byte] & (1 << bit)) {
+        if (x < busy.tl.x) busy.tl.x = x;
+        if (x+1 > busy.br.x) busy.br.x = x+1;
+        if (y < busy.tl.y) busy.tl.y = y;
+        if (y+1 > busy.br.y) busy.br.y = y+1;
+      }
+    }
+  }
+
+  if (width() == busy.width() && height() == busy.height()) return;
+
+  vlog.debug("cropping %dx%d to %dx%d", width(), height(),
+             busy.width(), busy.height());
+
+  // Copy the pixel data
+  int newDataLen = busy.area() * (getPF().bpp/8);
+  rdr::U8* newData = new rdr::U8[newDataLen];
+  getImage(newData, busy);
+
+  // Copy the mask
+  int newMaskBytesPerRow = (busy.width()+7)/8;
+  int newMaskLen = newMaskBytesPerRow * busy.height();
+  rdr::U8* newMask = new rdr::U8[newMaskLen];
+  memset(newMask, 0, newMaskLen);
+  for (y = 0; y < busy.height(); y++) {
+    int newByte, newBit;
+    for (x = 0; x < busy.width(); x++) {
+      int oldByte = (y+busy.tl.y) * maskBytesPerRow + (x+busy.tl.x) / 8;
+      int oldBit = 7 - (x+busy.tl.x) % 8;
+      newByte = y * newMaskBytesPerRow + x / 8;
+      newBit = 7 - x % 8;
+      if (mask.buf[oldByte] & (1 << oldBit))
+        newMask[newByte] |= (1 << newBit);
+    }
+  }
+
+  // Set the size and data to the new, cropped cursor.
+  setSize(busy.width(), busy.height());
+  hotspot = hotspot.subtract(busy.tl);
+  delete [] data;
+  delete [] mask.buf;
+  datasize = newDataLen;
+  data = newData;
+  mask.buf = newMask;
+}
diff --git a/common/rfb/Cursor.h b/common/rfb/Cursor.h
new file mode 100644
index 00000000..7d94d705
--- /dev/null
+++ b/common/rfb/Cursor.h
@@ -0,0 +1,56 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// Cursor - structure containing information describing
+//          the current cursor shape
+//
+
+#ifndef __RFB_CURSOR_H__
+#define __RFB_CURSOR_H__
+
+#include <rfb/PixelBuffer.h>
+
+namespace rfb {
+
+  class Cursor : public ManagedPixelBuffer {
+  public:
+    Cursor() {}
+    rdr::U8Array mask;
+    Point hotspot;
+
+    int maskLen() { return (width() + 7) / 8 * height(); }
+
+    // setSize() resizes the cursor.  The contents of the data and mask are
+    // undefined after this call.
+    virtual void setSize(int w, int h);
+
+    // drawOutline() adds an outline to the cursor in the given colour.
+    void drawOutline(const Pixel& c);
+
+    // getBitmap() tests whether the cursor is monochrome, and if so returns a
+    // bitmap together with background and foreground colours.  The size and
+    // layout of the bitmap are the same as the mask.
+    rdr::U8* getBitmap(Pixel* pix0, Pixel* pix1);
+
+    // crop() crops the cursor down to the smallest possible size, based on the
+    // mask.
+    void crop();
+  };
+
+}
+#endif
diff --git a/common/rfb/Decoder.cxx b/common/rfb/Decoder.cxx
new file mode 100644
index 00000000..b6e4fd5b
--- /dev/null
+++ b/common/rfb/Decoder.cxx
@@ -0,0 +1,70 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <rfb/Exception.h>
+#include <rfb/Decoder.h>
+#include <rfb/RawDecoder.h>
+#include <rfb/RREDecoder.h>
+#include <rfb/HextileDecoder.h>
+#include <rfb/ZRLEDecoder.h>
+#include <rfb/TightDecoder.h>
+
+using namespace rfb;
+
+Decoder::~Decoder()
+{
+}
+
+DecoderCreateFnType Decoder::createFns[encodingMax+1] = { 0 };
+
+bool Decoder::supported(unsigned int encoding)
+{
+  return encoding <= encodingMax && createFns[encoding];
+}
+
+Decoder* Decoder::createDecoder(unsigned int encoding, CMsgReader* reader)
+{
+  if (encoding <= encodingMax && createFns[encoding])
+    return (*createFns[encoding])(reader);
+  return 0;
+}
+
+void Decoder::registerDecoder(unsigned int encoding,
+                              DecoderCreateFnType createFn)
+{
+  if (encoding > encodingMax)
+    throw Exception("Decoder::registerDecoder: encoding out of range");
+
+  if (createFns[encoding])
+    fprintf(stderr,"Replacing existing decoder for encoding %s (%d)\n",
+            encodingName(encoding), encoding);
+  createFns[encoding] = createFn;
+}
+
+int DecoderInit::count = 0;
+
+DecoderInit::DecoderInit()
+{
+  if (count++ != 0) return;
+
+  Decoder::registerDecoder(encodingRaw, RawDecoder::create);
+  Decoder::registerDecoder(encodingRRE, RREDecoder::create);
+  Decoder::registerDecoder(encodingHextile, HextileDecoder::create);
+  Decoder::registerDecoder(encodingZRLE, ZRLEDecoder::create);
+  Decoder::registerDecoder(encodingTight, TightDecoder::create);
+}
diff --git a/common/rfb/Decoder.h b/common/rfb/Decoder.h
new file mode 100644
index 00000000..3fdba537
--- /dev/null
+++ b/common/rfb/Decoder.h
@@ -0,0 +1,52 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_DECODER_H__
+#define __RFB_DECODER_H__
+
+#include <rfb/Rect.h>
+#include <rfb/encodings.h>
+
+namespace rfb {
+  class CMsgReader;
+  class CMsgHandler;
+  class Decoder;
+  typedef Decoder* (*DecoderCreateFnType)(CMsgReader*);
+
+  class Decoder {
+  public:
+    virtual ~Decoder();
+    virtual void readRect(const Rect& r, CMsgHandler* handler)=0;
+
+    static bool supported(unsigned int encoding);
+    static Decoder* createDecoder(unsigned int encoding, CMsgReader* reader);
+    static void registerDecoder(unsigned int encoding,
+                                DecoderCreateFnType createFn);
+  private:
+    static DecoderCreateFnType createFns[encodingMax+1];
+  };
+
+  class DecoderInit {
+    static int count;
+  public:
+    DecoderInit();
+  };
+
+  static DecoderInit decoderInitObj;
+}
+
+#endif
diff --git a/common/rfb/DirManager.h b/common/rfb/DirManager.h
new file mode 100644
index 00000000..c820f648
--- /dev/null
+++ b/common/rfb/DirManager.h
@@ -0,0 +1,42 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- DirManager.cxx
+
+#ifndef __RFB_DIRMANAGER_H__
+#define __RFB_DIRMANAGER_H__
+
+#include <rfb/FileInfo.h>
+
+namespace rfb {
+  class DirManager {
+  public:
+    virtual bool createDir(char *pFullPath) = 0;
+    virtual bool renameIt(char *pOldName, char *pNewName) = 0;
+    virtual bool deleteIt(char *pFullPath) = 0;
+
+    virtual bool getDirInfo(char *pPath, FileInfo *pFileInfo, unsigned int dirOnly) = 0;
+  };
+}
+
+#endif // __RFB_DIRMANAGER_H__
\ No newline at end of file
diff --git a/common/rfb/Encoder.cxx b/common/rfb/Encoder.cxx
new file mode 100644
index 00000000..53cb1709
--- /dev/null
+++ b/common/rfb/Encoder.cxx
@@ -0,0 +1,77 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <rfb/Exception.h>
+#include <rfb/Encoder.h>
+#include <rfb/RawEncoder.h>
+#include <rfb/RREEncoder.h>
+#include <rfb/HextileEncoder.h>
+#include <rfb/ZRLEEncoder.h>
+#include <rfb/TightEncoder.h>
+
+using namespace rfb;
+
+Encoder::~Encoder()
+{
+}
+
+EncoderCreateFnType Encoder::createFns[encodingMax+1] = { 0 };
+
+bool Encoder::supported(unsigned int encoding)
+{
+  return encoding <= encodingMax && createFns[encoding];
+}
+
+Encoder* Encoder::createEncoder(unsigned int encoding, SMsgWriter* writer)
+{
+  if (encoding <= encodingMax && createFns[encoding])
+    return (*createFns[encoding])(writer);
+  return 0;
+}
+
+void Encoder::registerEncoder(unsigned int encoding,
+                              EncoderCreateFnType createFn)
+{
+  if (encoding > encodingMax)
+    throw Exception("Encoder::registerEncoder: encoding out of range");
+
+  if (createFns[encoding])
+    fprintf(stderr,"Replacing existing encoder for encoding %s (%d)\n",
+            encodingName(encoding), encoding);
+  createFns[encoding] = createFn;
+}
+
+void Encoder::unregisterEncoder(unsigned int encoding)
+{
+  if (encoding > encodingMax)
+    throw Exception("Encoder::unregisterEncoder: encoding out of range");
+  createFns[encoding] = 0;
+}
+
+int EncoderInit::count = 0;
+
+EncoderInit::EncoderInit()
+{
+  if (count++ != 0) return;
+
+  Encoder::registerEncoder(encodingRaw, RawEncoder::create);
+  Encoder::registerEncoder(encodingRRE, RREEncoder::create);
+  Encoder::registerEncoder(encodingHextile, HextileEncoder::create);
+  Encoder::registerEncoder(encodingZRLE, ZRLEEncoder::create);
+  Encoder::registerEncoder(encodingTight, TightEncoder::create);
+}
diff --git a/common/rfb/Encoder.h b/common/rfb/Encoder.h
new file mode 100644
index 00000000..df50dd6d
--- /dev/null
+++ b/common/rfb/Encoder.h
@@ -0,0 +1,61 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_ENCODER_H__
+#define __RFB_ENCODER_H__
+
+#include <rfb/Rect.h>
+#include <rfb/encodings.h>
+
+namespace rfb {
+  class SMsgWriter;
+  class Encoder;
+  class ImageGetter;
+  typedef Encoder* (*EncoderCreateFnType)(SMsgWriter*);
+
+  class Encoder {
+  public:
+    virtual ~Encoder();
+
+    virtual void setCompressLevel(int level) {};
+    virtual void setQualityLevel(int level) {};
+    virtual int getNumRects(const Rect &r) { return 1; }
+
+    // writeRect() tries to write the given rectangle.  If it is unable to
+    // write the whole rectangle it returns false and sets actual to the actual
+    // rectangle which was updated.
+    virtual bool writeRect(const Rect& r, ImageGetter* ig, Rect* actual)=0;
+
+    static bool supported(unsigned int encoding);
+    static Encoder* createEncoder(unsigned int encoding, SMsgWriter* writer);
+    static void registerEncoder(unsigned int encoding,
+                                EncoderCreateFnType createFn);
+    static void unregisterEncoder(unsigned int encoding);
+  private:
+    static EncoderCreateFnType createFns[encodingMax+1];
+  };
+
+  class EncoderInit {
+    static int count;
+  public:
+    EncoderInit();
+  };
+
+  static EncoderInit encoderInitObj;
+}
+
+#endif
diff --git a/common/rfb/Exception.h b/common/rfb/Exception.h
new file mode 100644
index 00000000..7c2cbcaa
--- /dev/null
+++ b/common/rfb/Exception.h
@@ -0,0 +1,37 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_EXCEPTION_H__
+#define __RFB_EXCEPTION_H__
+
+#include <rdr/Exception.h>
+
+namespace rfb {
+  typedef rdr::Exception Exception;
+  struct AuthFailureException : public Exception {
+    AuthFailureException(const char* s="Authentication failure")
+      : Exception(s) {}
+  };
+  struct AuthCancelledException : public rfb::Exception {
+    AuthCancelledException(const char* s="Authentication cancelled")
+      : Exception(s) {}
+  };
+  struct ConnFailedException : public Exception {
+    ConnFailedException(const char* s="Connection failed") : Exception(s) {}
+  };
+}
+#endif
diff --git a/common/rfb/FileInfo.cxx b/common/rfb/FileInfo.cxx
new file mode 100644
index 00000000..e97e0adb
--- /dev/null
+++ b/common/rfb/FileInfo.cxx
@@ -0,0 +1,244 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+#include <rfb/FileInfo.h>
+#include <rfb/util.h>
+
+#ifdef _WIN32
+#define strcasecmp _stricmp
+#endif
+
+using namespace rfb;
+
+// FIXME: Under Unix, file names are case-sensitive.
+
+int 
+CompareFileInfo(const void *F, const void *S)
+{
+  FILEINFO *pF = (FILEINFO *) F;
+  FILEINFO *pS = (FILEINFO *) S;
+  if (pF->info.flags == pS->info.flags) {
+    return strcasecmp(pF->name, pS->name);
+  } else {
+	if (pF->info.flags == FT_ATTR_DIR) return -1;
+	if (pS->info.flags == FT_ATTR_DIR)
+      return 1;
+	else
+      return strcasecmp(pF->name, pS->name);
+  }
+  
+  return 0;
+}
+
+FileInfo::FileInfo()
+{
+  m_numEntries = 0;
+  m_pEntries = NULL;
+}
+
+FileInfo::~FileInfo()
+{
+  free();
+}
+
+void 
+FileInfo::add(FileInfo *pFI)
+{
+  m_numEntries = pFI->getNumEntries();
+  FILEINFO *pTemporary = new FILEINFO[m_numEntries];
+  memcpy(pTemporary, pFI->getNameAt(0), m_numEntries * sizeof(FILEINFO));
+  
+  m_pEntries = pTemporary;
+  pTemporary = NULL;
+}
+
+void 
+FileInfo::add(FILEINFO *pFIStruct)
+{
+  add(pFIStruct->name, pFIStruct->info.size, pFIStruct->info.data, pFIStruct->info.flags);
+}
+
+void 
+FileInfo::add(char *pName, unsigned int size, unsigned int data, unsigned int flags)
+{
+  FILEINFO *pTemporary = new FILEINFO[m_numEntries + 1];
+  if (m_numEntries != 0) 
+    memcpy(pTemporary, m_pEntries, m_numEntries * sizeof(FILEINFO));
+  strcpy(pTemporary[m_numEntries].name, pName);
+  pTemporary[m_numEntries].info.size = size;
+  pTemporary[m_numEntries].info.data = data;
+  pTemporary[m_numEntries].info.flags = flags;
+  if (m_pEntries != NULL) {
+    delete [] m_pEntries;
+    m_pEntries = NULL;
+  }
+  m_pEntries = pTemporary;
+  pTemporary = NULL;
+  m_numEntries++;
+}
+
+char *
+FileInfo::getNameAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].name;
+  }
+  return NULL;
+}
+
+bool 
+FileInfo::setNameAt(unsigned int number, char *pName)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    strcpy(m_pEntries[number].name, pName);
+    return true;
+  }
+  return false;
+}
+
+unsigned int
+FileInfo::getSizeAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].info.size;
+  }
+  return 0;
+}
+
+unsigned int
+FileInfo::getDataAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].info.data;
+  }
+  return 0;
+}
+
+unsigned int
+FileInfo::getFlagsAt(unsigned int number)
+{
+	if ((number >= 0) && (number < m_numEntries)) {
+		return m_pEntries[number].info.flags;
+	}
+	return 0;
+}
+
+FILEINFO * 
+FileInfo::getFullDataAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return &m_pEntries[number];
+  }
+  return NULL;
+}
+	
+bool 
+FileInfo::setSizeAt(unsigned int number, unsigned int value)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    m_pEntries[number].info.size = value;
+    return true;
+  }
+  return false;
+}
+
+bool 
+FileInfo::setDataAt(unsigned int number, unsigned int value)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    m_pEntries[number].info.data = value;
+    return true;
+  }
+  return false;
+}
+
+bool 
+FileInfo::setFlagsAt(unsigned int number, unsigned int value)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    m_pEntries[number].info.flags = value;
+    return true;
+  }
+  return false;
+}
+
+bool 
+FileInfo::deleteAt(unsigned int number)
+{
+  if ((number >= m_numEntries) || (number < 0)) return false;
+  
+  FILEINFO *pTemporary = new FILEINFO[m_numEntries - 1];
+  
+  if (number == 0) {
+    memcpy(pTemporary, &m_pEntries[1], (m_numEntries - 1) * sizeof(FILEINFO));
+  } else {
+    memcpy(pTemporary, m_pEntries, number * sizeof(FILEINFO));
+    if (number != (m_numEntries - 1)) 
+      memcpy(&pTemporary[number], &m_pEntries[number + 1], (m_numEntries - number - 1) * sizeof(FILEINFO));
+  }
+  
+  if (m_pEntries != NULL) {
+    delete [] m_pEntries;
+    m_pEntries = NULL;
+  }
+  m_pEntries = pTemporary;
+  pTemporary = NULL;
+  m_numEntries--;
+  return true;
+}
+
+unsigned int 
+FileInfo::getNumEntries()
+{
+  return m_numEntries;
+}
+
+void 
+FileInfo::sort()
+{
+  qsort(m_pEntries, m_numEntries, sizeof(FILEINFO), CompareFileInfo);
+}
+
+void 
+FileInfo::free()
+{
+  if (m_pEntries != NULL) {
+    delete [] m_pEntries;
+    m_pEntries = NULL;
+  }
+  m_numEntries = 0;
+}
+
+unsigned int
+FileInfo::getFilenamesSize()
+{
+  if (getNumEntries() == 0) return 0;
+
+  unsigned int filenamesSize = 0;
+
+  for (unsigned int i = 0; i < getNumEntries(); i++) {
+    filenamesSize += strlen(getNameAt(i));
+  }
+
+  return filenamesSize;
+}
diff --git a/common/rfb/FileInfo.h b/common/rfb/FileInfo.h
new file mode 100644
index 00000000..270eeee9
--- /dev/null
+++ b/common/rfb/FileInfo.h
@@ -0,0 +1,74 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- FileInfo.
+
+#ifndef __RFB_FILEINFO_H__
+#define __RFB_FILEINFO_H__
+
+#include <stdlib.h>
+
+#include <rfb/fttypes.h>
+
+namespace rfb {
+  class FileInfo  
+  {
+  public:
+    void add(FileInfo *pFI);
+    void add(FILEINFO *pFIStruct);
+    void add(char *pName, unsigned int size, unsigned int data, unsigned int flags);
+    
+    char *getNameAt(unsigned int number);
+    
+    bool setNameAt(unsigned int number, char *pName);
+    
+    unsigned int getSizeAt(unsigned int number);
+    unsigned int getDataAt(unsigned int number);
+    unsigned int getFlagsAt(unsigned int number);
+    
+    FILEINFO *getFullDataAt(unsigned int number);
+    
+    bool setSizeAt(unsigned int number, unsigned int value);
+    bool setDataAt(unsigned int number, unsigned int value);
+    bool setFlagsAt(unsigned int number, unsigned int value);
+    
+    bool deleteAt(unsigned int number);
+    
+    unsigned int getNumEntries();
+
+    unsigned int getFilenamesSize();
+    
+    void sort();
+    void free();
+    
+    FileInfo();
+    ~FileInfo();
+    
+  private:
+    FILEINFO *m_pEntries;
+    unsigned int m_numEntries;
+
+  };
+}
+
+#endif // __RFB_FILEINFO_H__
diff --git a/common/rfb/FileManager.cxx b/common/rfb/FileManager.cxx
new file mode 100644
index 00000000..74cbd452
--- /dev/null
+++ b/common/rfb/FileManager.cxx
@@ -0,0 +1,81 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- FileManager.cxx
+
+#include <rfb/FileManager.h>
+
+using namespace rfb;
+
+FileManager::FileManager()
+{
+  m_pFile = NULL;
+}
+
+FileManager::~FileManager()
+{
+  close();
+}
+
+bool 
+FileManager::create(char *pFilename)
+{
+  if (m_pFile != NULL) return false;
+  
+  strcpy(m_szFilename, pFilename);
+
+  m_pFile = fopen(m_szFilename, m_szMode);
+
+  if (m_pFile == NULL) {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+bool 
+FileManager::close()
+{
+  if (m_pFile == NULL) return false;
+  
+  int result = fclose(m_pFile);
+  
+  if (result != 0) {
+    return false;
+  } else {
+    m_pFile = NULL;
+    return true;
+  }
+}
+
+bool 
+FileManager::isCreated()
+{
+  if (m_pFile != NULL) return true; else return false;
+}
+
+char *
+FileManager::getFilename()
+{
+  return m_szFilename;
+}
diff --git a/common/rfb/FileManager.h b/common/rfb/FileManager.h
new file mode 100644
index 00000000..4fd736f8
--- /dev/null
+++ b/common/rfb/FileManager.h
@@ -0,0 +1,50 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- FileManager.
+
+#ifndef __RFB_FILEMANAGER_H__
+#define __RFB_FILEMANAGER_H__
+
+#include <rfb/fttypes.h>
+
+namespace rfb {
+  class FileManager {
+  public:
+    FileManager();
+    ~FileManager();
+    
+    bool create(char *pFilename);
+    bool close();
+    
+    bool isCreated();
+
+    char *getFilename();
+
+  protected:
+    FILE *m_pFile;
+    char m_szMode[4];
+    char m_szFilename[FT_FILENAME_SIZE];
+  };
+}
+#endif // __RFB_FILEMANAGER_H__
diff --git a/common/rfb/FileReader.cxx b/common/rfb/FileReader.cxx
new file mode 100644
index 00000000..a8cd2724
--- /dev/null
+++ b/common/rfb/FileReader.cxx
@@ -0,0 +1,51 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- FileReader.cxx
+
+#include <rfb/FileReader.h>
+
+using namespace rfb;
+
+FileReader::FileReader()
+{
+  strcpy(m_szMode, "rb");
+}
+
+bool 
+FileReader::read(void *pBuf, unsigned int count, unsigned int *pBytesRead)
+{
+  if (!isCreated()) return false;
+
+  *pBytesRead = fread(pBuf, 1, count, m_pFile);
+  
+  if (ferror(m_pFile)) return false;
+ 
+  return true;
+}
+
+unsigned int 
+FileReader::getTime()
+{
+  return 0;
+}
diff --git a/common/rfb/FileReader.h b/common/rfb/FileReader.h
new file mode 100644
index 00000000..0c985d82
--- /dev/null
+++ b/common/rfb/FileReader.h
@@ -0,0 +1,41 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- FileReader.h
+
+#ifndef __RFB_FILEREADER_H__
+#define __RFB_FILEREADER_H__
+
+#include <rfb/FileManager.h>
+
+namespace rfb {
+  class FileReader : public FileManager {
+  public:
+    FileReader();
+
+    bool read(void *pBuf, unsigned int count, unsigned int *pBytesRead);
+
+    unsigned int getTime();
+  };
+}
+#endif // __RFB_FILEREADER_H__
diff --git a/common/rfb/FileWriter.cxx b/common/rfb/FileWriter.cxx
new file mode 100644
index 00000000..2bed5765
--- /dev/null
+++ b/common/rfb/FileWriter.cxx
@@ -0,0 +1,52 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- FileWriter.cxx
+
+#include <rfb/FileWriter.h>
+
+using namespace rfb;
+
+FileWriter::FileWriter()
+{
+  strcpy(m_szMode, "wb");
+}
+
+bool 
+FileWriter::write(const void *pBuf, unsigned int count, unsigned int *pBytesWritten)
+{
+  if (!isCreated()) return false;
+
+  unsigned int bytesWritten = fwrite(pBuf, 1, count, m_pFile);
+
+  if (ferror(m_pFile)) return false;
+
+  *pBytesWritten = bytesWritten;
+  return true;
+}
+
+bool 
+FileWriter::setTime(unsigned int modTime)
+{
+  return false;
+}
diff --git a/common/rfb/FileWriter.h b/common/rfb/FileWriter.h
new file mode 100644
index 00000000..73094a7e
--- /dev/null
+++ b/common/rfb/FileWriter.h
@@ -0,0 +1,41 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- FileWriter.h
+
+#ifndef __RFB_FILEWRITER_H__
+#define __RFB_FILEWRITER_H__
+
+#include <rfb/FileManager.h>
+
+namespace rfb {
+  class FileWriter : public FileManager {
+  public:
+    FileWriter();
+
+    bool write(const void *pBuf, unsigned int count, unsigned int *pBytesWritten);
+    bool setTime(unsigned int modTime);
+  };
+}
+
+#endif // __RFB_FILEWRITER_H__
diff --git a/common/rfb/HTTPServer.cxx b/common/rfb/HTTPServer.cxx
new file mode 100644
index 00000000..e40d4802
--- /dev/null
+++ b/common/rfb/HTTPServer.cxx
@@ -0,0 +1,411 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <rfb/HTTPServer.h>
+#include <rfb/LogWriter.h>
+#include <rfb/util.h>
+#include <rdr/MemOutStream.h>
+
+#ifdef WIN32
+#define strcasecmp _stricmp
+#endif
+
+
+using namespace rfb;
+using namespace rdr;
+
+static LogWriter vlog("HTTPServer");
+
+const int clientWaitTimeMillis = 20000;
+const int idleTimeoutSecs = 5 * 60;
+
+
+//
+// -=- LineReader
+//     Helper class which is repeatedly called until a line has been read
+//     (lines end in \n or \r\n).
+//     Returns true when line complete, and resets internal state so that
+//     next read() call will start reading a new line.
+//     Only one buffer is kept - process line before reading next line!
+//
+
+class LineReader : public CharArray {
+public:
+  LineReader(InStream& is_, int l)
+    : CharArray(l), is(is_), pos(0), len(l), bufferOverrun(false) {}
+
+  // Returns true if line complete, false otherwise
+  bool read() {
+    while (is.checkNoWait(1)) {
+      char c = is.readU8();
+
+      if (c == '\n') {
+        if (pos && (buf[pos-1] == '\r'))
+          pos--;
+        bufferOverrun = false;
+        buf[pos++] = 0;
+        pos = 0;
+        return true;
+      }
+
+      if (pos == (len-1)) {
+        bufferOverrun = true;
+        buf[pos] = 0;
+        return true;
+      }
+
+      buf[pos++] = c;
+    }
+
+    return false;
+  }
+  bool didBufferOverrun() const {return bufferOverrun;}
+protected:
+  InStream& is;
+  int pos, len;
+  bool bufferOverrun;
+};
+
+
+//
+// -=- HTTPServer::Session
+//     Manages the internal state for an HTTP session.
+//     processHTTP returns true when request has completed,
+//     indicating that socket & session data can be deleted.
+//
+
+class rfb::HTTPServer::Session {
+public:
+  Session(network::Socket& s, rfb::HTTPServer& srv)
+    : contentType(0), contentLength(-1), lastModified(-1),
+      line(s.inStream(), 256), sock(s),
+      server(srv), state(ReadRequestLine), lastActive(time(0)) {
+  }
+  ~Session() {
+  }
+
+  void writeResponse(int result, const char* text);
+  bool writeResponse(int code);
+
+  bool processHTTP();
+
+  network::Socket* getSock() const {return &sock;}
+
+  int checkIdleTimeout();
+protected:
+  CharArray uri;
+  const char* contentType;
+  int contentLength;
+  time_t lastModified;
+  LineReader line;
+  network::Socket& sock;
+  rfb::HTTPServer& server;
+  enum {ReadRequestLine, ReadHeaders, WriteResponse} state;
+  enum {GetRequest, HeadRequest} request;
+  time_t lastActive;
+};
+
+
+// - Internal helper routines
+
+void
+copyStream(InStream& is, OutStream& os) {
+  try {
+    while (1) {
+      os.writeU8(is.readU8());
+    }
+  } catch (rdr::EndOfStream) {
+  }
+}
+
+void writeLine(OutStream& os, const char* text) {
+  os.writeBytes(text, strlen(text));
+  os.writeBytes("\r\n", 2);
+}
+
+
+// - Write an HTTP-compliant response to the client
+
+
+void
+HTTPServer::Session::writeResponse(int result, const char* text) {
+  char buffer[1024];
+  if (strlen(text) > 512)
+    throw new rdr::Exception("Internal error - HTTP response text too big");
+  sprintf(buffer, "%s %d %s", "HTTP/1.1", result, text);
+  OutStream& os=sock.outStream();
+  writeLine(os, buffer);
+  writeLine(os, "Server: TightVNC/4.0");
+  time_t now = time(0);
+  struct tm* tm = gmtime(&now);
+  strftime(buffer, 1024, "Date: %a, %d %b %Y %H:%M:%S GMT", tm);
+  writeLine(os, buffer);
+  if (lastModified == (time_t)-1 || lastModified == 0)
+    lastModified = now;
+  tm = gmtime(&lastModified);
+  strftime(buffer, 1024, "Last-Modified: %a, %d %b %Y %H:%M:%S GMT", tm);
+  writeLine(os, buffer);
+  if (contentLength != -1) {
+    sprintf(buffer,"Content-Length: %d",contentLength);
+    writeLine(os, buffer);
+  }
+  writeLine(os, "Connection: close");
+  os.writeBytes("Content-Type: ", 14);
+  if (result == 200) {
+    if (!contentType)
+      contentType = guessContentType(uri.buf, "text/html");
+    os.writeBytes(contentType, strlen(contentType));
+  } else {
+    os.writeBytes("text/html", 9);
+  }
+  os.writeBytes("\r\n", 2);
+  writeLine(os, "");
+  if (result != 200) {
+    writeLine(os, "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">");
+    writeLine(os, "<HTML><HEAD>");
+    sprintf(buffer, "<TITLE>%d %s</TITLE>", result, text);
+    writeLine(os, buffer);
+    writeLine(os, "</HEAD><BODY><H1>");
+    writeLine(os, text);
+    writeLine(os, "</H1></BODY></HTML>");
+    sock.outStream().flush();
+  }
+}
+
+bool
+HTTPServer::Session::writeResponse(int code) {
+  switch (code) {
+  case 200: writeResponse(code, "OK"); break;
+  case 400: writeResponse(code, "Bad Request"); break;
+  case 404: writeResponse(code, "Not Found"); break;
+  case 501: writeResponse(code, "Not Implemented"); break;
+  default: writeResponse(500, "Unknown Error"); break;
+  };
+
+  // This return code is passed straight out of processHTTP().
+  // true indicates that the request has been completely processed.
+  return true;
+}
+
+// - Main HTTP request processing routine
+
+bool
+HTTPServer::Session::processHTTP() {
+  lastActive = time(0);
+
+  while (sock.inStream().checkNoWait(1)) {
+
+    switch (state) {
+
+      // Reading the Request-Line
+    case ReadRequestLine:
+
+      // Either read a line, or run out of incoming data
+      if (!line.read())
+        return false;
+
+      // We have read a line!  Skip it if it's blank
+      if (strlen(line.buf) == 0)
+        continue;
+
+      // The line contains a request to process.
+      {
+        char method[16], path[128], version[16];
+        int matched = sscanf(line.buf, "%15s%127s%15s",
+          method, path, version);
+        if (matched != 3)
+          return writeResponse(400);
+
+        // Store the required "method"
+        if (strcmp(method, "GET") == 0)
+          request = GetRequest;
+        else if (strcmp(method, "HEAD") == 0)
+          request = HeadRequest;
+        else
+          return writeResponse(501);
+
+        // Store the URI to the "document"
+        uri.buf = strDup(path);
+      }
+
+      // Move on to reading the request headers
+      state = ReadHeaders;
+      break;
+
+      // Reading the request headers
+    case ReadHeaders:
+
+      // Try to read a line
+      if (!line.read())
+        return false;
+
+      // Skip headers until we hit a blank line
+      if (strlen(line.buf) != 0)
+        continue;
+
+      // Headers ended - write the response!
+      {
+        CharArray address(sock.getPeerAddress());
+        vlog.info("getting %s for %s", uri.buf, address.buf);
+        contentLength = -1;
+        lastModified = -1;
+        InStream* data = server.getFile(uri.buf, &contentType, &contentLength,
+                                        &lastModified);
+        if (!data)
+          return writeResponse(404);
+
+        try {
+          writeResponse(200);
+          if (request == GetRequest)
+            copyStream(*data, sock.outStream());
+          sock.outStream().flush();
+        } catch (rdr::Exception& e) {
+          vlog.error("error writing HTTP document:%s", e.str());
+        }
+        delete data;
+      }
+
+      // The operation is complete!
+      return true;
+
+    default:
+      throw rdr::Exception("invalid HTTPSession state!");
+    };
+
+  }
+
+  // Indicate that we're still processing the HTTP request.
+  return false;
+}
+
+int HTTPServer::Session::checkIdleTimeout() {
+  time_t now = time(0);
+  int timeout = (lastActive + idleTimeoutSecs) - now;
+  if (timeout > 0)
+    return secsToMillis(timeout);
+  sock.shutdown();
+  return 0;
+}
+
+// -=- Constructor / destructor
+
+HTTPServer::HTTPServer() {
+}
+
+HTTPServer::~HTTPServer() {
+  std::list<Session*>::iterator i;
+  for (i=sessions.begin(); i!=sessions.end(); i++)
+    delete *i;
+}
+
+
+// -=- SocketServer interface implementation
+
+void
+HTTPServer::addSocket(network::Socket* sock, bool) {
+  Session* s = new Session(*sock, *this);
+  if (!s) {
+    sock->shutdown();
+  } else {
+    sock->inStream().setTimeout(clientWaitTimeMillis);
+    sock->outStream().setTimeout(clientWaitTimeMillis);
+    sessions.push_front(s);
+  }
+}
+
+void
+HTTPServer::removeSocket(network::Socket* sock) {
+  std::list<Session*>::iterator i;
+  for (i=sessions.begin(); i!=sessions.end(); i++) {
+    if ((*i)->getSock() == sock) {
+      delete *i;
+      sessions.erase(i);
+      return;
+    }
+  }
+}
+
+void
+HTTPServer::processSocketEvent(network::Socket* sock) {
+  std::list<Session*>::iterator i;
+  for (i=sessions.begin(); i!=sessions.end(); i++) {
+    if ((*i)->getSock() == sock) {
+      try {
+        if ((*i)->processHTTP()) {
+          vlog.info("completed HTTP request");
+          sock->shutdown();
+        }
+      } catch (rdr::Exception& e) {
+        vlog.error("untrapped: %s", e.str());
+        sock->shutdown();
+      }
+      return;
+    }
+  }
+  throw rdr::Exception("invalid Socket in HTTPServer");
+}
+
+void HTTPServer::getSockets(std::list<network::Socket*>* sockets)
+{
+  sockets->clear();
+  std::list<Session*>::iterator ci;
+  for (ci = sessions.begin(); ci != sessions.end(); ci++) {
+    sockets->push_back((*ci)->getSock());
+  }
+}
+
+int HTTPServer::checkTimeouts() {
+  std::list<Session*>::iterator ci;
+  int timeout = 0;
+  for (ci = sessions.begin(); ci != sessions.end(); ci++) {
+    soonestTimeout(&timeout, (*ci)->checkIdleTimeout());
+  }
+  return timeout;
+}
+
+
+// -=- Default getFile implementation
+
+InStream*
+HTTPServer::getFile(const char* name, const char** contentType,
+                    int* contentLength, time_t* lastModified)
+{
+  return 0;
+}
+
+const char*
+HTTPServer::guessContentType(const char* name, const char* defType) {
+  CharArray file, ext;
+  if (!strSplit(name, '.', &file.buf, &ext.buf))
+    return defType;
+  if (strcasecmp(ext.buf, "html") == 0 ||
+    strcasecmp(ext.buf, "htm") == 0) {
+    return "text/html";
+  } else if (strcasecmp(ext.buf, "txt") == 0) {
+    return "text/plain";
+  } else if (strcasecmp(ext.buf, "gif") == 0) {
+    return "image/gif";
+  } else if (strcasecmp(ext.buf, "jpg") == 0) {
+    return "image/jpeg";
+  } else if (strcasecmp(ext.buf, "jar") == 0) {
+    return "application/java-archive";
+  } else if (strcasecmp(ext.buf, "exe") == 0) {
+    return "application/octet-stream";
+  }
+  return defType;
+}
diff --git a/common/rfb/HTTPServer.h b/common/rfb/HTTPServer.h
new file mode 100644
index 00000000..6412946a
--- /dev/null
+++ b/common/rfb/HTTPServer.h
@@ -0,0 +1,110 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- HTTPServer.h
+
+// Single-threaded HTTP server implementation.
+// All I/O is handled by the processSocketEvent routine,
+// which is called by the main-loop of the VNC server whenever
+// there is an event on an HTTP socket.
+
+#ifndef __RFB_HTTP_SERVER_H__
+#define __RFB_HTTP_SERVER_H__
+
+#include <list>
+
+#include <rdr/MemInStream.h>
+#include <rfb/UpdateTracker.h>
+#include <rfb/Configuration.h>
+#include <network/Socket.h>
+#include <time.h>
+
+namespace rfb {
+
+  class HTTPServer : public network::SocketServer {
+  public:
+    // -=- Constructors
+
+    // - HTTPServer(files)
+    //   Create an HTTP server which will use the getFile method
+    //   to satisfy HTTP GET requests.
+    HTTPServer();
+
+    virtual ~HTTPServer();
+
+    // SocketServer interface
+
+    // addSocket()
+    //   This causes the server to perform HTTP protocol on the
+    //   supplied socket.
+    virtual void addSocket(network::Socket* sock, bool outgoing=false);
+
+    // removeSocket()
+    //   Could clean up socket-specific resources here.
+    virtual void removeSocket(network::Socket* sock);
+
+    // processSocketEvent()
+    //   The platform-specific side of the server implementation calls
+    //   this method whenever data arrives on one of the active
+    //   network sockets.
+    virtual void processSocketEvent(network::Socket* sock);
+
+    // Check for socket timeouts
+    virtual int checkTimeouts();
+
+
+    // getSockets() gets a list of sockets.  This can be used to generate an
+    // fd_set for calling select().
+
+    virtual void getSockets(std::list<network::Socket*>* sockets);
+
+
+    // -=- File interface
+
+    // - getFile is passed the path portion of a URL and returns an
+    //   InStream containing the data to return.  If the requested
+    //   file is available then the contentType should be set to the
+    //   type of the file, or left untouched if the file type is to
+    //   be determined automatically by HTTPServer.
+    //   If the file is not available then null is returned.
+    //   Overridden getFile functions should call the default version
+    //   if they do not recognise a path name.
+    //   NB: The caller assumes ownership of the returned InStream.
+    //   NB: The contentType is statically allocated by the getFile impl.
+    //   NB: contentType is *guaranteed* to be valid when getFile is called.
+
+    virtual rdr::InStream* getFile(const char* name, const char** contentType,
+                                   int* contentLength, time_t* lastModified);
+
+    // - guessContentType is passed the name of a file and returns the
+    //   name of an HTTP content type, based on the file's extension.  If
+    //   the extension isn't recognised then defType is returned.  This can
+    //   be used from getFile to easily default to the supplied contentType,
+    //   or by passing zero in to determine whether a type is recognised or
+    //   not.
+
+    static const char* guessContentType(const char* name, const char* defType);
+
+  protected:
+    class Session;
+    std::list<Session*> sessions;
+  };
+}
+
+#endif
+
diff --git a/common/rfb/HextileDecoder.cxx b/common/rfb/HextileDecoder.cxx
new file mode 100644
index 00000000..e817c732
--- /dev/null
+++ b/common/rfb/HextileDecoder.cxx
@@ -0,0 +1,59 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/CMsgReader.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/HextileDecoder.h>
+
+using namespace rfb;
+
+#define EXTRA_ARGS CMsgHandler* handler
+#define FILL_RECT(r, p) handler->fillRect(r, p)
+#define IMAGE_RECT(r, p) handler->imageRect(r, p)
+#define BPP 8
+#include <rfb/hextileDecode.h>
+#undef BPP
+#define BPP 16
+#include <rfb/hextileDecode.h>
+#undef BPP
+#define BPP 32
+#include <rfb/hextileDecode.h>
+#undef BPP
+
+Decoder* HextileDecoder::create(CMsgReader* reader)
+{
+  return new HextileDecoder(reader);
+}
+
+HextileDecoder::HextileDecoder(CMsgReader* reader_) : reader(reader_)
+{
+}
+
+HextileDecoder::~HextileDecoder()
+{
+}
+
+void HextileDecoder::readRect(const Rect& r, CMsgHandler* handler)
+{
+  rdr::InStream* is = reader->getInStream();
+  rdr::U8* buf = reader->getImageBuf(16 * 16 * 4);
+  switch (reader->bpp()) {
+  case 8:  hextileDecode8 (r, is, (rdr::U8*) buf, handler); break;
+  case 16: hextileDecode16(r, is, (rdr::U16*)buf, handler); break;
+  case 32: hextileDecode32(r, is, (rdr::U32*)buf, handler); break;
+  }
+}
diff --git a/common/rfb/HextileDecoder.h b/common/rfb/HextileDecoder.h
new file mode 100644
index 00000000..e7dd3d58
--- /dev/null
+++ b/common/rfb/HextileDecoder.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_HEXTILEDECODER_H__
+#define __RFB_HEXTILEDECODER_H__
+
+#include <rfb/Decoder.h>
+
+namespace rfb {
+
+  class HextileDecoder : public Decoder {
+  public:
+    static Decoder* create(CMsgReader* reader);
+    virtual void readRect(const Rect& r, CMsgHandler* handler);
+    virtual ~HextileDecoder();
+  private:
+    HextileDecoder(CMsgReader* reader);
+    CMsgReader* reader;
+  };
+}
+#endif
diff --git a/common/rfb/HextileEncoder.cxx b/common/rfb/HextileEncoder.cxx
new file mode 100644
index 00000000..ba71d56d
--- /dev/null
+++ b/common/rfb/HextileEncoder.cxx
@@ -0,0 +1,90 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * Copyright (C) 2005 Constantin Kaplinsky.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/ImageGetter.h>
+#include <rfb/encodings.h>
+#include <rfb/SMsgWriter.h>
+#include <rfb/HextileEncoder.h>
+#include <rfb/Configuration.h>
+
+using namespace rfb;
+
+BoolParameter improvedHextile("ImprovedHextile",
+                              "Use improved compression algorithm for Hextile "
+                              "encoding which achieves better compression "
+                              "ratios by the cost of using more CPU time",
+                              true);
+
+#define EXTRA_ARGS ImageGetter* ig
+#define GET_IMAGE_INTO_BUF(r,buf) ig->getImage(buf, r);
+#define BPP 8
+#include <rfb/hextileEncode.h>
+#include <rfb/hextileEncodeBetter.h>
+#undef BPP
+#define BPP 16
+#include <rfb/hextileEncode.h>
+#include <rfb/hextileEncodeBetter.h>
+#undef BPP
+#define BPP 32
+#include <rfb/hextileEncode.h>
+#include <rfb/hextileEncodeBetter.h>
+#undef BPP
+
+Encoder* HextileEncoder::create(SMsgWriter* writer)
+{
+  return new HextileEncoder(writer);
+}
+
+HextileEncoder::HextileEncoder(SMsgWriter* writer_) : writer(writer_)
+{
+}
+
+HextileEncoder::~HextileEncoder()
+{
+}
+
+bool HextileEncoder::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+{
+  writer->startRect(r, encodingHextile);
+  rdr::OutStream* os = writer->getOutStream();
+  switch (writer->bpp()) {
+  case 8:
+    if (improvedHextile) {
+      hextileEncodeBetter8(r, os, ig);
+    } else {
+      hextileEncode8(r, os, ig);
+    }
+    break;
+  case 16:
+    if (improvedHextile) {
+      hextileEncodeBetter16(r, os, ig);
+    } else {
+      hextileEncode16(r, os, ig);
+    }
+    break;
+  case 32:
+    if (improvedHextile) {
+      hextileEncodeBetter32(r, os, ig);
+    } else {
+      hextileEncode32(r, os, ig);
+    }
+    break;
+  }
+  writer->endRect();
+  return true;
+}
diff --git a/common/rfb/HextileEncoder.h b/common/rfb/HextileEncoder.h
new file mode 100644
index 00000000..c78107a4
--- /dev/null
+++ b/common/rfb/HextileEncoder.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_HEXTILEENCODER_H__
+#define __RFB_HEXTILEENCODER_H__
+
+#include <rfb/Encoder.h>
+
+namespace rfb {
+
+  class HextileEncoder : public Encoder {
+  public:
+    static Encoder* create(SMsgWriter* writer);
+    virtual bool writeRect(const Rect& r, ImageGetter* ig, Rect* actual);
+    virtual ~HextileEncoder();
+  private:
+    HextileEncoder(SMsgWriter* writer);
+    SMsgWriter* writer;
+  };
+}
+#endif
diff --git a/common/rfb/Hostname.h b/common/rfb/Hostname.h
new file mode 100644
index 00000000..ebdf816f
--- /dev/null
+++ b/common/rfb/Hostname.h
@@ -0,0 +1,55 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RFB_HOSTNAME_H__
+#define __RFB_HOSTNAME_H__
+
+#include <stdlib.h>
+#include <rdr/Exception.h>
+#include <rfb/util.h>
+
+namespace rfb {
+
+  static void getHostAndPort(const char* hi, char** host, int* port, int basePort=5900) {
+    CharArray portBuf;
+    CharArray hostBuf;
+    if (hi[0] == '[') {
+      if (!strSplit(&hi[1], ']', &hostBuf.buf, &portBuf.buf))
+        throw rdr::Exception("unmatched [ in host");
+    } else {
+      portBuf.buf = strDup(hi);
+    }
+    if (strSplit(portBuf.buf, ':', hostBuf.buf ? 0 : &hostBuf.buf, &portBuf.buf)) {
+      if (portBuf.buf[0] == ':') {
+        *port = atoi(&portBuf.buf[1]);
+      } else {
+        *port = atoi(portBuf.buf);
+        if (*port < 100) *port += basePort;
+      }
+    } else {
+      *port = basePort;
+    }
+    if (strlen(hostBuf.buf) == 0)
+      *host = strDup("localhost");
+    else
+      *host = hostBuf.takeBuf();
+  }
+
+};
+
+#endif // __RFB_HOSTNAME_H__
diff --git a/common/rfb/ImageGetter.h b/common/rfb/ImageGetter.h
new file mode 100644
index 00000000..290249f6
--- /dev/null
+++ b/common/rfb/ImageGetter.h
@@ -0,0 +1,30 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_IMAGEGETTER_H__
+#define __RFB_IMAGEGETTER_H__
+
+#include <rfb/Rect.h>
+
+namespace rfb {
+  class ImageGetter {
+  public:
+    virtual void getImage(void* imageBuf,
+                          const Rect& r, int stride=0) = 0;
+  };
+}
+#endif
diff --git a/common/rfb/InputHandler.h b/common/rfb/InputHandler.h
new file mode 100644
index 00000000..b5e5e879
--- /dev/null
+++ b/common/rfb/InputHandler.h
@@ -0,0 +1,40 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// InputHandler - abstract interface for accepting keyboard &
+// pointer input and clipboard data.
+//
+
+#ifndef __RFB_INPUTHANDLER_H__
+#define __RFB_INPUTHANDLER_H__
+
+#include <rdr/types.h>
+#include <rfb/Rect.h>
+
+namespace rfb {
+
+  class InputHandler {
+  public:
+    virtual ~InputHandler() {}
+    virtual void keyEvent(rdr::U32 key, bool down) {}
+    virtual void pointerEvent(const Point& pos, int buttonMask) {}
+    virtual void clientCutText(const char* str, int len) {}
+  };
+
+}
+#endif
diff --git a/common/rfb/KeyRemapper.cxx b/common/rfb/KeyRemapper.cxx
new file mode 100644
index 00000000..05f07632
--- /dev/null
+++ b/common/rfb/KeyRemapper.cxx
@@ -0,0 +1,84 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <stdio.h>
+#include <rfb/KeyRemapper.h>
+#include <rfb/Configuration.h>
+#include <rfb/LogWriter.h>
+
+using namespace rfb;
+
+static LogWriter vlog("KeyRemapper");
+
+KeyRemapper KeyRemapper::defInstance;
+
+#ifdef __RFB_THREADING_IMPL
+static Mutex mappingLock;
+#endif
+
+void KeyRemapper::setMapping(const char* m) {
+#ifdef __RFB_THREADING_IMPL
+  Lock l(mappingLock);
+#endif
+  mapping.clear();
+  while (m[0]) {
+    int from, to;
+    char bidi;
+    const char* nextComma = strchr(m, ',');
+    if (!nextComma)
+      nextComma = m + strlen(m);
+    if (sscanf(m, "0x%x%c>0x%x", &from,
+               &bidi, &to) == 3) {
+      if (bidi != '-' && bidi != '<')
+        vlog.error("warning: unknown operation %c>, assuming ->", bidi);
+      mapping[from] = to;
+      if (bidi == '<')
+        mapping[to] = from;
+    } else {
+      vlog.error("warning: bad mapping %.*s", nextComma-m, m);
+    }
+    m = nextComma;
+    if (nextComma[0])
+      m++;
+  }
+}
+
+rdr::U32 KeyRemapper::remapKey(rdr::U32 key) const {
+#ifdef __RFB_THREADING_IMPL
+  Lock l(mappingLock);
+#endif
+  std::map<rdr::U32,rdr::U32>::const_iterator i = mapping.find(key);
+  if (i != mapping.end())
+    return i->second;
+  return key;
+}
+
+
+class KeyMapParameter : public StringParameter {
+public:
+  KeyMapParameter()
+    : StringParameter("RemapKeys", "Comma-separated list of incoming keysyms to remap.  Mappings are expressed as two hex values, prefixed by 0x, and separated by ->", "") {
+    setParam(value);
+  }
+  bool setParam(const char* v) {
+    KeyRemapper::defInstance.setMapping(v);
+    return StringParameter::setParam(v);
+  }
+} defaultParam;
+
+
diff --git a/common/rfb/KeyRemapper.h b/common/rfb/KeyRemapper.h
new file mode 100644
index 00000000..a4b7aa01
--- /dev/null
+++ b/common/rfb/KeyRemapper.h
@@ -0,0 +1,39 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RFB_KEYREMAPPER_H__
+#define __RFB_KEYREMAPPER_H__
+
+#include <map>
+#include <rdr/types.h>
+
+namespace rfb {
+
+  class KeyRemapper {
+  public:
+    KeyRemapper(const char* m="") { setMapping(m); }
+    void setMapping(const char* m);
+    rdr::U32 remapKey(rdr::U32 key) const;
+    static KeyRemapper defInstance;
+  private:
+    std::map<rdr::U32,rdr::U32> mapping;
+  };
+
+};
+
+#endif // __RFB_KEYREMAPPER_H__
diff --git a/common/rfb/ListConnInfo.h b/common/rfb/ListConnInfo.h
new file mode 100644
index 00000000..cabcbc79
--- /dev/null
+++ b/common/rfb/ListConnInfo.h
@@ -0,0 +1,122 @@
+/* Copyright (C) 2002-2003 RealVNC Ltd.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+
+#ifndef __RFB_LISTCONNINFO_INCLUDED__
+#define __RFB_LISTCONNINFO_INCLUDED__
+
+namespace rfb {
+
+  struct ListConnInfo  {
+    ListConnInfo() : disableClients(false) {}
+
+    void Clear() {
+      conn.clear();
+      IP_address.clear();
+      time_conn.clear();
+      status.clear();
+    }
+
+    bool Empty() { return conn.empty();}
+
+    void iBegin() {
+      ci = conn.begin();
+      Ii = IP_address.begin();
+      ti = time_conn.begin();
+      si = status.begin();
+    }
+
+    bool iEnd() { return ci == conn.end();}
+
+    void iNext() {
+      ci++;
+      Ii++;
+      ti++;
+      si++;
+    }
+
+    void addInfo(void* Conn, char* IP, char* Time, int Status) {
+      conn.push_back(Conn);
+      IP_address.push_back(strDup(IP));
+      time_conn.push_back(strDup(Time));
+      status.push_back(Status);
+    }
+
+    void iGetCharInfo(char* buf[3]) {
+      buf[0] = *Ii;
+      buf[1] = *ti;
+      switch (*si) {
+      case 0:
+        buf[2] = strDup("Full control");
+        break;
+      case 1:
+        buf[2] = strDup("View only");
+        break;
+      case 2:
+        buf[2] = strDup("Stop updating");
+        break;
+      default:
+        buf[2] = strDup("Unknown");
+      }
+    }
+
+    void* iGetConn() { return *ci;}
+
+    int iGetStatus() { return *si;}
+
+    void iSetStatus( int status) { *si = status;}
+
+    void Copy(ListConnInfo* InputList) {
+      Clear();
+      if (InputList->Empty()) return;
+      for (InputList->iBegin(); !InputList->iEnd(); InputList->iNext()) {
+        iAdd(InputList);
+      }
+      setDisable(InputList->getDisable());
+    }
+
+    void iAdd (ListConnInfo* InputList) {
+      char* buf[3];
+      InputList->iGetCharInfo(buf);
+      addInfo(InputList->iGetConn(), buf[0], buf[1], InputList->iGetStatus());
+    }
+
+    void setDisable(bool disable) {disableClients = disable;}
+
+    bool getDisable() {return disableClients;}
+
+    void setAllStatus(int stat) {
+      std::list<int>::iterator st;
+      for (st = status.begin(); st != status.end(); st++)
+        *st = stat;
+    }
+
+  private:
+    std::list<void*> conn;
+    std::list<char*> IP_address;
+    std::list<char*> time_conn;
+    std::list<int> status;
+    std::list<void*>::iterator ci;
+    std::list<char*>::iterator Ii;
+    std::list<char*>::iterator ti;
+    std::list<int>::iterator si;
+    bool disableClients;
+  };
+};
+#endif
+
diff --git a/common/rfb/LogWriter.cxx b/common/rfb/LogWriter.cxx
new file mode 100644
index 00000000..c6461d14
--- /dev/null
+++ b/common/rfb/LogWriter.cxx
@@ -0,0 +1,137 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- LogWriter.cxx - client-side logging interface
+
+#include <string.h>
+#ifdef WIN32
+#define strcasecmp _stricmp
+#endif
+
+#include <rfb/LogWriter.h>
+#include <rfb/Configuration.h>
+#include <rfb/util.h>
+#include <stdlib.h>
+
+rfb::LogParameter rfb::logParams;
+
+using namespace rfb;
+
+
+LogWriter::LogWriter(const char* name) : m_name(name), m_level(0), m_log(0), m_next(log_writers) {
+  log_writers = this;
+}
+
+LogWriter::~LogWriter() {
+  // *** Should remove this logger here!
+}
+
+void LogWriter::setLog(Logger *logger) {
+  m_log = logger;
+}
+
+void LogWriter::setLevel(int level) {
+  m_level = level;
+}
+
+void
+LogWriter::listLogWriters(int width) {
+  // *** make this respect width...
+  LogWriter* current = log_writers;
+  fprintf(stderr, "  ");
+  while (current) {
+    fprintf(stderr, "%s", current->m_name);
+    current = current->m_next;
+    if (current) fprintf(stderr, ", ");
+  }
+  fprintf(stderr, "\n");
+}
+
+LogWriter* LogWriter::log_writers;
+
+LogWriter*
+LogWriter::getLogWriter(const char* name) {
+  LogWriter* current = log_writers;
+  while (current) {
+    if (strcasecmp(name, current->m_name) == 0) return current;
+      current = current->m_next;
+    }
+  return 0;
+}
+
+bool LogWriter::setLogParams(const char* params) {
+  CharArray logwriterName, loggerName, logLevel;
+  if (!strSplit(params, ':', &logwriterName.buf, &loggerName.buf) ||
+    !strSplit(loggerName.buf, ':', &loggerName.buf, &logLevel.buf)) {
+    fprintf(stderr,"failed to parse log params:%s\n",params);
+    return false;
+  }
+  int level = atoi(logLevel.buf);
+  Logger* logger = 0;
+  if (strcmp("", loggerName.buf) != 0) {
+    logger = Logger::getLogger(loggerName.buf);
+    if (!logger) fprintf(stderr,"no logger found! %s\n",loggerName.buf);
+  }
+  if (strcmp("*", logwriterName.buf) == 0) {
+    LogWriter* current = log_writers;
+    while (current) {
+      current->setLog(logger);
+      current->setLevel(level);
+      current = current->m_next;
+    }
+    return true;
+  } else {
+    LogWriter* logwriter = getLogWriter(logwriterName.buf);
+    if (!logwriter) {
+      fprintf(stderr,"no logwriter found! %s\n",logwriterName.buf);
+    } else {
+      logwriter->setLog(logger);
+      logwriter->setLevel(level);
+      return true;
+    }
+  }
+  return false;
+}
+
+
+LogParameter::LogParameter()
+  : StringParameter("Log",
+    "Specifies which log output should be directed to "
+    "which target logger, and the level of output to log. "
+    "Format is <log>:<target>:<level>[, ...].",
+    "") {
+}
+
+bool LogParameter::setParam(const char* v) {
+  if (immutable) return true;
+  LogWriter::setLogParams("*::0");
+  StringParameter::setParam(v);
+  CharArray logParam;
+  CharArray params(getData());
+  while (params.buf) {
+    strSplit(params.buf, ',', &logParam.buf, &params.buf);
+    if (strlen(logParam.buf) && !LogWriter::setLogParams(logParam.buf))
+      return false;
+  }
+  return true;
+}
+
+void LogParameter::setDefault(const char* d) {
+  def_value = d;
+  setParam(def_value);
+}
diff --git a/common/rfb/LogWriter.h b/common/rfb/LogWriter.h
new file mode 100644
index 00000000..124c58ec
--- /dev/null
+++ b/common/rfb/LogWriter.h
@@ -0,0 +1,106 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- LogWriter.h - The Log writer class.
+
+#ifndef __RFB_LOG_WRITER_H__
+#define __RFB_LOG_WRITER_H__
+
+#include <stdarg.h>
+#include <rfb/Logger.h>
+#include <rfb/Configuration.h>
+
+// Each log writer instance has a unique textual name,
+// and is attached to a particular Log instance and
+// is assigned a particular log level.
+
+#define DEF_LOGFUNCTION(name, level) \
+  inline void name(const char* fmt, ...) { \
+    if (m_log && (level <= m_level)) {     \
+      va_list ap; va_start(ap, fmt);       \
+      m_log->write(level, m_name, fmt, ap);\
+      va_end(ap);                          \
+    }                                      \
+  }
+
+namespace rfb {
+
+  class LogWriter;
+
+  class LogWriter {
+  public:
+    LogWriter(const char* name);
+    ~LogWriter();
+
+    const char *getName() {return m_name;}
+
+    void setLog(Logger *logger);
+    void setLevel(int level);
+
+    inline void write(int level, const char* format, ...) {
+      if (m_log && (level <= m_level)) {
+        va_list ap;
+        va_start(ap, format);
+        m_log->write(level, m_name, format, ap);
+        va_end(ap);
+      }
+    }
+
+    DEF_LOGFUNCTION(error, 0)
+    DEF_LOGFUNCTION(status, 10)
+    DEF_LOGFUNCTION(info, 30)
+    DEF_LOGFUNCTION(debug, 100)
+
+    // -=- DIAGNOSTIC & HELPER ROUTINES
+
+    static void listLogWriters(int width=79);
+
+    // -=- CLASS FIELDS & FUNCTIONS
+
+    static LogWriter* log_writers;
+
+    static LogWriter* getLogWriter(const char* name);
+
+    static bool setLogParams(const char* params);
+
+  private:
+    const char* m_name;
+    int m_level;
+    Logger* m_log;
+    LogWriter* m_next;
+  };
+
+  class LogParameter : public StringParameter {
+  public:
+    LogParameter();
+    virtual bool setParam(const char* v);
+
+    // Call this to set a suitable default value.
+    // Can't use the normal default mechanism for
+    // this because there is no guarantee on C++
+    // constructor ordering - some LogWriters may
+    // not exist when LogParameter gets constructed.
+    // NB: The default value must exist for the
+    //     lifetime of the process!
+    void setDefault(const char* v);
+  };
+  extern LogParameter logParams;
+
+};
+
+#endif // __RFB_LOG_WRITER_H__
diff --git a/common/rfb/Logger.cxx b/common/rfb/Logger.cxx
new file mode 100644
index 00000000..52d33085
--- /dev/null
+++ b/common/rfb/Logger.cxx
@@ -0,0 +1,118 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Logger.cxx - support for the Logger and LogWriter classes
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#ifdef WIN32
+#define strcasecmp _stricmp
+#define vsnprintf _vsnprintf
+#define HAVE_VSNPRINTF
+#endif
+
+#include <rfb/Logger.h>
+#include <rfb/LogWriter.h>
+#include <rfb/util.h>
+#include <rfb/Threading.h>
+
+using namespace rfb;
+
+#ifndef HAVE_VSNPRINTF
+#ifdef __RFB_THREADING_IMPL
+static Mutex fpLock;
+#endif
+static FILE* fp = 0;
+int vsnprintf(char *str, size_t n, const char *format, va_list ap)
+{
+  str[0] = 0;
+  if (!fp) {
+    // Safely create a FILE* for /dev/null if there isn't already one
+#ifdef __RFB_THREADING_IMPL
+    Lock l(fpLock);
+#endif
+    if (!fp)
+      fp = fopen("/dev/null","w");
+    if (!fp) return 0;
+  }
+  int len = vfprintf(fp, format, ap);
+  if (len <= 0) return 0;
+
+  CharArray s(len+1);
+  vsprintf(s.buf, format, ap);
+
+  int written = __rfbmin(len, (int)n-1);
+  memcpy(str, s.buf, written);
+  str[written] = 0;
+  return len;
+}
+#endif
+
+
+Logger* Logger::loggers = 0;
+
+Logger::Logger(const char* name) : registered(false), m_name(name), m_next(0) {
+}
+
+Logger::~Logger() {
+  // *** Should remove this logger here!
+}
+
+void Logger::write(int level, const char *logname, const char* format,
+                   va_list ap)
+{
+  // - Format the supplied data, and pass it to the
+  //   actual log_message function
+  //   The log level is included as a hint for loggers capable of representing
+  //   different log levels in some way.
+  char buf1[4096];
+  vsnprintf(buf1, sizeof(buf1)-1, format, ap);
+  buf1[sizeof(buf1)-1] = 0;
+  write(level, logname, buf1);
+}
+
+void
+Logger::registerLogger() {
+  if (!registered) {
+    registered = true;
+    m_next = loggers;
+    loggers=this;
+  }
+}
+    
+Logger*
+Logger::getLogger(const char* name) {
+  Logger* current = loggers;
+  while (current) {
+    if (strcasecmp(name, current->m_name) == 0) return current;
+    current = current->m_next;
+  }
+  return 0;
+}
+
+void
+Logger::listLoggers() {
+  Logger* current = loggers;
+  while (current) {
+    printf("  %s\n", current->m_name);
+    current = current->m_next;
+  }
+}
+
+
diff --git a/common/rfb/Logger.h b/common/rfb/Logger.h
new file mode 100644
index 00000000..e53764b7
--- /dev/null
+++ b/common/rfb/Logger.h
@@ -0,0 +1,70 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Logger.h - The Logger class.
+
+#ifndef __RFB_LOGGER_H__
+#define __RFB_LOGGER_H__
+
+#include <stdarg.h>
+#include <stdio.h>
+
+// Each log writer instance has a unique textual name,
+// and is attached to a particular Logger instance and
+// is assigned a particular log level.
+
+namespace rfb {
+
+  class Logger {
+  public:
+
+    // -=- Create / Destroy a logger
+
+    Logger(const char* name);
+    virtual ~Logger();
+
+    // -=- Get the name of a logger
+
+    const char *getName() {return m_name;}
+
+    // -=- Write data to a log
+
+    virtual void write(int level, const char *logname, const char *text) = 0;
+    void write(int level, const char *logname, const char* format, va_list ap);
+
+    // -=- Register a logger
+
+    void registerLogger();
+
+    // -=- CLASS FIELDS & FUNCTIONS
+
+    static Logger* loggers;
+
+    static Logger* getLogger(const char* name);
+
+    static void listLoggers();
+
+  private:
+    bool registered;
+    const char *m_name;
+    Logger *m_next;
+  };
+
+};
+
+#endif // __RFB_LOGGER_H__
diff --git a/common/rfb/Logger_file.cxx b/common/rfb/Logger_file.cxx
new file mode 100644
index 00000000..8a109e4a
--- /dev/null
+++ b/common/rfb/Logger_file.cxx
@@ -0,0 +1,127 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Logger_file.cxx - Logger instance for a file
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <rfb/util.h>
+#include <rfb/Logger_file.h>
+#include <rfb/Threading.h>
+
+using namespace rfb;
+
+
+// If threading is available then protect the write() operation
+// from concurrent accesses
+#ifdef __RFB_THREADING_IMPL
+static Mutex logLock;
+#endif
+
+
+Logger_File::Logger_File(const char* loggerName)
+  : Logger(loggerName), indent(13), width(79), m_filename(0), m_file(0),
+    m_lastLogTime(0)
+{
+}
+
+Logger_File::~Logger_File()
+{
+  closeFile();
+}
+
+void Logger_File::write(int level, const char *logname, const char *message)
+{
+#ifdef __RFB_THREADING_IMPL
+  Lock l(logLock);
+#endif
+  if (!m_file) {
+    if (!m_filename) return;
+    CharArray bakFilename(strlen(m_filename) + 1 + 4);
+    sprintf(bakFilename.buf, "%s.bak", m_filename);
+    remove(bakFilename.buf);
+    rename(m_filename, bakFilename.buf);
+    m_file = fopen(m_filename, "w+");
+    if (!m_file) return;
+  }
+
+#ifndef _WIN32_WCE
+  time_t current = time(0);
+  if (current != m_lastLogTime) {
+    m_lastLogTime = current;
+    fprintf(m_file, "\n%s", ctime(&m_lastLogTime));
+  }
+#endif
+
+  fprintf(m_file," %s:", logname);
+  int column = strlen(logname) + 2;
+  if (column < indent) {
+    fprintf(m_file,"%*s",indent-column,"");
+    column = indent;
+  }
+  while (true) {
+    const char* s = strchr(message, ' ');
+    int wordLen;
+    if (s) wordLen = s-message;
+    else wordLen = strlen(message);
+
+    if (column + wordLen + 1 > width) {
+      fprintf(m_file,"\n%*s",indent,"");
+      column = indent;
+    }
+    fprintf(m_file," %.*s",wordLen,message);
+    column += wordLen + 1;
+    message += wordLen + 1;
+    if (!s) break;
+  }
+  fprintf(m_file,"\n");
+  fflush(m_file);
+}
+
+void Logger_File::setFilename(const char* filename)
+{
+  closeFile();
+  m_filename = strDup(filename);
+}
+
+void Logger_File::setFile(FILE* file)
+{
+  closeFile();
+  m_file = file;
+}
+
+void Logger_File::closeFile()
+{
+  if (m_filename) {
+    if (m_file) {
+      fclose(m_file);
+      m_file = 0;
+    }
+    strFree(m_filename);
+    m_filename = 0;
+  }
+}
+
+static Logger_File logger("file");
+
+bool rfb::initFileLogger(const char* filename) {
+  logger.setFilename(filename);
+  logger.registerLogger();
+  return true;
+}
diff --git a/common/rfb/Logger_file.h b/common/rfb/Logger_file.h
new file mode 100644
index 00000000..5e0c917b
--- /dev/null
+++ b/common/rfb/Logger_file.h
@@ -0,0 +1,51 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Logger_file - log to a file
+
+#ifndef __RFB_LOGGER_FILE_H__
+#define __RFB_LOGGER_FILE_H__
+
+#include <time.h>
+#include <rfb/Logger.h>
+
+namespace rfb {
+
+  class Logger_File : public Logger {
+  public:
+    Logger_File(const char* loggerName);
+    ~Logger_File();
+
+    virtual void write(int level, const char *logname, const char *message);
+    void setFilename(const char* filename);
+    void setFile(FILE* file);
+
+    int indent;
+    int width;
+
+  protected:
+    void closeFile();
+    char* m_filename;
+    FILE* m_file;
+    time_t m_lastLogTime;
+  };
+
+  bool initFileLogger(const char* filename);
+};
+
+#endif
diff --git a/common/rfb/Logger_stdio.cxx b/common/rfb/Logger_stdio.cxx
new file mode 100644
index 00000000..581dcd5b
--- /dev/null
+++ b/common/rfb/Logger_stdio.cxx
@@ -0,0 +1,32 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Logger_stdio.cxx - Logger instances for stderr and stdout
+
+#include <rfb/Logger_stdio.h>
+
+using namespace rfb;
+
+static Logger_StdIO logStdErr("stderr", stderr);
+static Logger_StdIO logStdOut("stdout", stdout);
+
+bool rfb::initStdIOLoggers() {
+  logStdErr.registerLogger();
+  logStdOut.registerLogger();
+  return true;
+}
diff --git a/common/rfb/Logger_stdio.h b/common/rfb/Logger_stdio.h
new file mode 100644
index 00000000..a1d17a0f
--- /dev/null
+++ b/common/rfb/Logger_stdio.h
@@ -0,0 +1,39 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Logger_stdio - standard output logger instances
+
+#ifndef __RFB_LOGGER_STDIO_H__
+#define __RFB_LOGGER_STDIO_H__
+
+#include <rfb/Logger_file.h>
+
+namespace rfb {
+
+  class Logger_StdIO : public Logger_File {
+  public:
+    Logger_StdIO(const char *name, FILE* file) : Logger_File(name) {
+      setFile(file);
+    }
+  };
+
+  bool initStdIOLoggers();
+
+};
+
+#endif
diff --git a/common/rfb/Makefile.in b/common/rfb/Makefile.in
new file mode 100644
index 00000000..835e1882
--- /dev/null
+++ b/common/rfb/Makefile.in
@@ -0,0 +1,80 @@
+
+CXXSRCS = \
+  Blacklist.cxx \
+  CConnection.cxx \
+  CMsgHandler.cxx \
+  CMsgReader.cxx \
+  CMsgReaderV3.cxx \
+  CMsgWriter.cxx \
+  CMsgWriterV3.cxx \
+  CSecurityVncAuth.cxx \
+  ComparingUpdateTracker.cxx \
+  Configuration.cxx \
+  ConnParams.cxx \
+  Cursor.cxx \
+  Decoder.cxx \
+  Encoder.cxx \
+  FileInfo.cxx \
+  FileManager.cxx \
+  FileReader.cxx \
+  FileWriter.cxx \
+  HTTPServer.cxx \
+  HextileDecoder.cxx \
+  HextileEncoder.cxx \
+  KeyRemapper.cxx \
+  LogWriter.cxx \
+  Logger.cxx \
+  Logger_file.cxx \
+  Logger_stdio.cxx \
+  Password.cxx \
+  PixelBuffer.cxx \
+  PixelFormat.cxx \
+  RREEncoder.cxx \
+  RREDecoder.cxx \
+  RawDecoder.cxx \
+  RawEncoder.cxx \
+  Region.cxx \
+  SConnection.cxx \
+  SFTMsgReader.cxx \
+  SFTMsgWriter.cxx \
+  SFileTransfer.cxx \
+  SFileTransferManager.cxx \
+  SMsgHandler.cxx \
+  SMsgReader.cxx \
+  SMsgReaderV3.cxx \
+  SMsgWriter.cxx \
+  SMsgWriterV3.cxx \
+  ServerCore.cxx \
+  SSecurityFactoryStandard.cxx \
+  SSecurityVncAuth.cxx \
+  Timer.cxx \
+  TightDecoder.cxx \
+  TightEncoder.cxx \
+  TightPalette.cxx \
+  TransImageGetter.cxx \
+  TransferQueue.cxx \
+  UpdateTracker.cxx \
+  VNCSConnectionST.cxx \
+  VNCServerST.cxx \
+  ZRLEEncoder.cxx \
+  ZRLEDecoder.cxx \
+  encodings.cxx \
+  secTypes.cxx \
+  util.cxx
+
+SRCS = d3des.c $(CXXSRCS)
+
+OBJS = d3des.o $(CXXSRCS:.cxx=.o)
+
+DIR_CPPFLAGS = -I$(top_srcdir) @ZLIB_INCLUDE@ @JPEG_INCLUDE@ @VSNPRINTF_DEFINE@
+
+library = librfb.a
+
+all:: $(library)
+
+$(library): $(OBJS)
+	rm -f $(library)
+	$(AR) $(library) $(OBJS)
+	$(RANLIB) $(library)
+
+# followed by boilerplate.mk
diff --git a/common/rfb/Password.cxx b/common/rfb/Password.cxx
new file mode 100644
index 00000000..9127862d
--- /dev/null
+++ b/common/rfb/Password.cxx
@@ -0,0 +1,77 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// XXX not thread-safe, because d3des isn't - do we need to worry about this?
+//
+
+#include <string.h>
+extern "C" {
+#include <rfb/d3des.h>
+}
+#include <rdr/types.h>
+#include <rdr/Exception.h>
+#include <rfb/Password.h>
+
+using namespace rfb;
+
+static unsigned char d3desObfuscationKey[] = {23,82,107,6,35,78,88,7};
+
+
+PlainPasswd::PlainPasswd() {}
+
+PlainPasswd::PlainPasswd(char* pwd) : CharArray(pwd) {
+}
+
+PlainPasswd::PlainPasswd(const ObfuscatedPasswd& obfPwd) : CharArray(9) {
+  if (obfPwd.length < 8)
+    throw rdr::Exception("bad obfuscated password length");
+  deskey(d3desObfuscationKey, DE1);
+  des((rdr::U8*)obfPwd.buf, (rdr::U8*)buf);
+  buf[8] = 0;
+}
+
+PlainPasswd::~PlainPasswd() {
+  replaceBuf(0);
+}
+
+void PlainPasswd::replaceBuf(char* b) {
+  if (buf)
+    memset(buf, 0, strlen(buf));
+  CharArray::replaceBuf(b);
+}
+
+
+ObfuscatedPasswd::ObfuscatedPasswd() : length(0) {
+}
+
+ObfuscatedPasswd::ObfuscatedPasswd(int len) : CharArray(len), length(len) {
+}
+
+ObfuscatedPasswd::ObfuscatedPasswd(const PlainPasswd& plainPwd) : CharArray(8), length(8) {
+  int l = strlen(plainPwd.buf), i;
+  for (i=0; i<8; i++)
+    buf[i] = i<l ? plainPwd.buf[i] : 0;
+  deskey(d3desObfuscationKey, EN0);
+  des((rdr::U8*)buf, (rdr::U8*)buf);
+}
+
+ObfuscatedPasswd::~ObfuscatedPasswd() {
+  if (buf)
+    memset(buf, 0, length);
+}
diff --git a/common/rfb/Password.h b/common/rfb/Password.h
new file mode 100644
index 00000000..ab26903a
--- /dev/null
+++ b/common/rfb/Password.h
@@ -0,0 +1,46 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_PASSWORD_H__
+#define __RFB_PASSWORD_H__
+
+#include <rfb/util.h>
+
+namespace rfb {
+
+  class ObfuscatedPasswd;
+
+  class PlainPasswd : public CharArray {
+  public:
+    PlainPasswd();
+    PlainPasswd(char* pwd);
+    PlainPasswd(const ObfuscatedPasswd& obfPwd);
+    ~PlainPasswd();
+    void replaceBuf(char* b);
+  };
+
+  class ObfuscatedPasswd : public CharArray {
+  public:
+    ObfuscatedPasswd();
+    ObfuscatedPasswd(int l);
+    ObfuscatedPasswd(const PlainPasswd& plainPwd);
+    ~ObfuscatedPasswd();
+    int length;
+  };
+
+}
+#endif
diff --git a/common/rfb/Pixel.h b/common/rfb/Pixel.h
new file mode 100644
index 00000000..4e9d1644
--- /dev/null
+++ b/common/rfb/Pixel.h
@@ -0,0 +1,26 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_PIXEL_H__
+#define __RFB_PIXEL_H__
+
+#include <rdr/types.h>
+
+namespace rfb {
+  typedef rdr::U32 Pixel; // must be big enough to hold any pixel value
+}
+#endif
diff --git a/common/rfb/PixelBuffer.cxx b/common/rfb/PixelBuffer.cxx
new file mode 100644
index 00000000..d093426f
--- /dev/null
+++ b/common/rfb/PixelBuffer.cxx
@@ -0,0 +1,309 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- PixelBuffer.cxx
+//
+// The PixelBuffer class encapsulates the PixelFormat and dimensions
+// of a block of pixel data.
+
+#include <rfb/Exception.h>
+#include <rfb/LogWriter.h>
+#include <rfb/PixelBuffer.h>
+
+using namespace rfb;
+using namespace rdr;
+
+static LogWriter vlog("PixelBuffer");
+
+
+// -=- Generic pixel buffer class
+
+PixelBuffer::PixelBuffer(const PixelFormat& pf, int w, int h, ColourMap* cm)
+  : format(pf), width_(w), height_(h), colourmap(cm) {}
+PixelBuffer::PixelBuffer() : width_(0), height_(0), colourmap(0) {}
+
+PixelBuffer::~PixelBuffer() {}
+
+
+void PixelBuffer::setPF(const PixelFormat &pf) {format = pf;}
+const PixelFormat& PixelBuffer::getPF() const {return format;}
+ColourMap* PixelBuffer::getColourMap() const {return colourmap;}
+
+
+void
+PixelBuffer::getImage(void* imageBuf, const Rect& r, int outStride) {
+  int inStride;
+  const U8* data = getPixelsR(r, &inStride);
+  // We assume that the specified rectangle is pre-clipped to the buffer
+  int bytesPerPixel = format.bpp/8;
+  int inBytesPerRow = inStride * bytesPerPixel;
+  if (!outStride) outStride = r.width();
+  int outBytesPerRow = outStride * bytesPerPixel;
+  int bytesPerMemCpy = r.width() * bytesPerPixel;
+  U8* imageBufPos = (U8*)imageBuf;
+  const U8* end = data + (inBytesPerRow * r.height());
+  while (data < end) {
+    memcpy(imageBufPos, data, bytesPerMemCpy);
+    imageBufPos += outBytesPerRow;
+    data += inBytesPerRow;
+  }
+}
+
+/* ***
+Pixel PixelBuffer::getPixel(const Point& p) {
+  int stride;
+  Rect r = Rect(p.x, p.y, p.x+1, p.y+1);
+  switch(format.bpp) {
+  case 8: return *((rdr::U8*)getDataAt(r, &stride));
+  case 16: return *((rdr::U16*)getDataAt(r, &stride));
+  case 32: return *((rdr::U32*)getDataAt(r, &stride));
+  default: return 0;
+  };
+}
+*/
+
+
+FullFramePixelBuffer::FullFramePixelBuffer(const PixelFormat& pf, int w, int h,
+                                           rdr::U8* data_, ColourMap* cm)
+  : PixelBuffer(pf, w, h, cm), data(data_)
+{
+}
+
+FullFramePixelBuffer::FullFramePixelBuffer() : data(0) {}
+
+FullFramePixelBuffer::~FullFramePixelBuffer() {}
+
+
+int FullFramePixelBuffer::getStride() const { return width(); }
+
+rdr::U8* FullFramePixelBuffer::getPixelsRW(const Rect& r, int* stride)
+{
+  *stride = getStride();
+  return &data[(r.tl.x + (r.tl.y * *stride)) * format.bpp/8];
+}
+
+
+void FullFramePixelBuffer::fillRect(const Rect& r, Pixel pix) {
+  int stride;
+  U8* data = getPixelsRW(r, &stride);
+  int bytesPerPixel = getPF().bpp/8;
+  int bytesPerRow = bytesPerPixel * stride;
+  int bytesPerFill = bytesPerPixel * r.width();
+
+  U8* end = data + (bytesPerRow * r.height());
+  while (data < end) {
+    switch (bytesPerPixel) {
+    case 1:
+      memset(data, pix, bytesPerFill);
+      break;
+    case 2:
+      {
+        U16* optr = (U16*)data;
+        U16* eol = optr + r.width();
+        while (optr < eol)
+          *optr++ = pix;
+      }
+      break;
+    case 4:
+      {
+        U32* optr = (U32*)data;
+        U32* eol = optr + r.width();
+        while (optr < eol)
+          *optr++ = pix;
+      }
+      break;
+    }
+    data += bytesPerRow;
+  }
+}
+
+void FullFramePixelBuffer::imageRect(const Rect& r, const void* pixels, int srcStride) {
+  int bytesPerPixel = getPF().bpp/8;
+  int destStride;
+  U8* dest = getPixelsRW(r, &destStride);
+  int bytesPerDestRow = bytesPerPixel * destStride;
+  if (!srcStride) srcStride = r.width();
+  int bytesPerSrcRow = bytesPerPixel * srcStride;
+  int bytesPerFill = bytesPerPixel * r.width();
+  const U8* src = (const U8*)pixels;
+  U8* end = dest + (bytesPerDestRow * r.height());
+  while (dest < end) {
+    memcpy(dest, src, bytesPerFill);
+    dest += bytesPerDestRow;
+    src += bytesPerSrcRow;
+  }
+}
+
+void FullFramePixelBuffer::maskRect(const Rect& r, const void* pixels, const void* mask_) {
+  Rect cr = getRect().intersect(r);
+  if (cr.is_empty()) return;
+  int stride;
+  U8* data = getPixelsRW(cr, &stride);
+  U8* mask = (U8*) mask_;
+  int w = cr.width();
+  int h = cr.height();
+  int bpp = getPF().bpp;
+  int pixelStride = r.width();
+  int maskStride = (r.width() + 7) / 8;
+
+  Point offset = Point(cr.tl.x-r.tl.x, cr.tl.y-r.tl.y);
+  mask += offset.y * maskStride;
+  for (int y = 0; y < h; y++) {
+    int cy = offset.y + y;
+    for (int x = 0; x < w; x++) {
+      int cx = offset.x + x;
+      U8* byte = mask + (cx / 8);
+      int bit = 7 - cx % 8;
+      if ((*byte) & (1 << bit)) {
+        switch (bpp) {
+        case 8:
+          ((U8*)data)[y * stride + x] = ((U8*)pixels)[cy * pixelStride + cx];
+          break;
+        case 16:
+          ((U16*)data)[y * stride + x] = ((U16*)pixels)[cy * pixelStride + cx];
+          break;
+        case 32:
+          ((U32*)data)[y * stride + x] = ((U32*)pixels)[cy * pixelStride + cx];
+          break;
+        }
+      }
+    }
+    mask += maskStride;
+  }
+}
+
+void FullFramePixelBuffer::maskRect(const Rect& r, Pixel pixel, const void* mask_) {
+  Rect cr = getRect().intersect(r);
+  if (cr.is_empty()) return;
+  int stride;
+  U8* data = getPixelsRW(cr, &stride);
+  U8* mask = (U8*) mask_;
+  int w = cr.width();
+  int h = cr.height();
+  int bpp = getPF().bpp;
+  int maskStride = (r.width() + 7) / 8;
+
+  Point offset = Point(cr.tl.x-r.tl.x, cr.tl.y-r.tl.y);
+  mask += offset.y * maskStride;
+  for (int y = 0; y < h; y++) {
+    for (int x = 0; x < w; x++) {
+      int cx = offset.x + x;
+      U8* byte = mask + (cx / 8);
+      int bit = 7 - cx % 8;
+      if ((*byte) & (1 << bit)) {
+        switch (bpp) {
+        case 8:
+          ((U8*)data)[y * stride + x] = pixel;
+          break;
+        case 16:
+          ((U16*)data)[y * stride + x] = pixel;
+          break;
+        case 32:
+          ((U32*)data)[y * stride + x] = pixel;
+          break;
+        }
+      }
+    }
+    mask += maskStride;
+  }
+}
+
+void FullFramePixelBuffer::copyRect(const Rect &rect, const Point &move_by_delta) {
+  int stride;
+  U8* data = getPixelsRW(getRect(), &stride);
+  // We assume that the specified rectangle is pre-clipped to the buffer
+  unsigned int bytesPerPixel, bytesPerRow, bytesPerMemCpy;
+  Rect srect = rect.translate(move_by_delta.negate());
+  bytesPerPixel = getPF().bpp/8;
+  bytesPerRow = stride * bytesPerPixel;
+  bytesPerMemCpy = rect.width() * bytesPerPixel;
+  if (move_by_delta.y <= 0) {
+    U8* dest = data + rect.tl.x*bytesPerPixel + rect.tl.y*bytesPerRow;
+    U8* src = data + srect.tl.x*bytesPerPixel + srect.tl.y*bytesPerRow;
+    for (int i=rect.tl.y; i<rect.br.y; i++) {
+      memmove(dest, src, bytesPerMemCpy);
+      dest += bytesPerRow;
+      src += bytesPerRow;
+    }
+  } else {
+    U8* dest = data + rect.tl.x*bytesPerPixel + (rect.br.y-1)*bytesPerRow;
+    U8* src = data + srect.tl.x*bytesPerPixel + (srect.br.y-1)*bytesPerRow;
+    for (int i=rect.tl.y; i<rect.br.y; i++) {
+      memmove(dest, src, bytesPerMemCpy);
+      dest -= bytesPerRow;
+      src -= bytesPerRow;
+    }
+  }
+}
+
+
+// -=- Managed pixel buffer class
+// Automatically allocates enough space for the specified format & area
+
+ManagedPixelBuffer::ManagedPixelBuffer()
+  : datasize(0), own_colourmap(false)
+{
+  checkDataSize();
+};
+
+ManagedPixelBuffer::ManagedPixelBuffer(const PixelFormat& pf, int w, int h)
+  : FullFramePixelBuffer(pf, w, h, 0, 0), datasize(0), own_colourmap(false)
+{
+  checkDataSize();
+};
+
+ManagedPixelBuffer::~ManagedPixelBuffer() {
+  if (data) delete [] data;
+  if (colourmap && own_colourmap) delete colourmap;
+};
+
+
+void
+ManagedPixelBuffer::setPF(const PixelFormat &pf) {
+  format = pf; checkDataSize();
+};
+void
+ManagedPixelBuffer::setSize(int w, int h) {
+  width_ = w; height_ = h; checkDataSize();
+};
+
+
+void
+ManagedPixelBuffer::setColourMap(ColourMap* cm, bool own_cm) {
+  if (colourmap && own_colourmap) delete colourmap;
+  colourmap = cm;
+  own_colourmap = own_cm;
+}
+
+inline void
+ManagedPixelBuffer::checkDataSize() {
+  unsigned long new_datasize = width_ * height_ * (format.bpp/8);
+  if (datasize < new_datasize) {
+    vlog.debug("reallocating managed buffer (%dx%d)", width_, height_);
+    if (data) {
+      delete [] data;
+      datasize = 0; data = 0;
+    }
+    if (new_datasize) {
+      data = new U8[new_datasize];
+      if (!data)
+        throw Exception("rfb::ManagedPixelBuffer unable to allocate buffer");
+      datasize = new_datasize;
+    }
+  }
+};
diff --git a/common/rfb/PixelBuffer.h b/common/rfb/PixelBuffer.h
new file mode 100644
index 00000000..4a13923c
--- /dev/null
+++ b/common/rfb/PixelBuffer.h
@@ -0,0 +1,172 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- PixelBuffer.h
+//
+// The PixelBuffer class encapsulates the PixelFormat and dimensions
+// of a block of pixel data.
+
+#ifndef __RFB_PIXEL_BUFFER_H__
+#define __RFB_PIXEL_BUFFER_H__
+
+#include <rfb/ImageGetter.h>
+#include <rfb/PixelFormat.h>
+#include <rfb/ColourMap.h>
+#include <rfb/Rect.h>
+#include <rfb/Pixel.h>
+
+namespace rfb {
+
+  class Region;
+
+  class PixelBuffer : public ImageGetter {
+  public:
+    PixelBuffer(const PixelFormat& pf, int width, int height, ColourMap* cm);
+    virtual ~PixelBuffer();
+
+    ///////////////////////////////////////////////
+    // Format / Layout
+    //
+
+    // Set/get pixel format & colourmap
+    virtual void setPF(const PixelFormat &pf);
+    virtual const PixelFormat &getPF() const;
+    virtual ColourMap* getColourMap() const;
+
+    // Get width, height and number of pixels
+    int width()  const { return width_; }
+    int height() const { return height_; }
+    int area() const { return width_ * height_; }
+
+    // Get rectangle encompassing this buffer
+    //   Top-left of rectangle is either at (0,0), or the specified point.
+    Rect getRect() const { return Rect(0, 0, width_, height_); }
+    Rect getRect(const Point& pos) const {
+      return Rect(pos, pos.translate(Point(width_, height_)));
+    }
+
+    ///////////////////////////////////////////////
+    // Access to pixel data
+    //
+
+    // Get a pointer into the buffer
+    //   The pointer is to the top-left pixel of the specified Rect.
+    //   The buffer stride (in pixels) is returned.
+    virtual const rdr::U8* getPixelsR(const Rect& r, int* stride) = 0;
+
+    // Get pixel data for a given part of the buffer
+    //   Data is copied into the supplied buffer, with the specified
+    //   stride.
+    virtual void getImage(void* imageBuf, const Rect& r, int stride=0);
+
+    // Get the data at (x,y) as a Pixel.
+    //   VERY INEFFICIENT!!!
+    // *** Pixel getPixel(const Point& p);
+
+    ///////////////////////////////////////////////
+    // Framebuffer update methods
+    //
+
+    // Ensure that the specified rectangle of buffer is up to date.
+    //   Overridden by derived classes implementing framebuffer access
+    //   to copy the required display data into place.
+    virtual void grabRegion(const Region& region) {}
+
+  protected:
+    PixelBuffer();
+    PixelFormat format;
+    int width_, height_;
+    ColourMap* colourmap;
+  };
+
+  // FullFramePixelBuffer
+
+  class FullFramePixelBuffer : public PixelBuffer {
+  public:
+    FullFramePixelBuffer(const PixelFormat& pf, int width, int height,
+                         rdr::U8* data_, ColourMap* cm);
+    virtual ~FullFramePixelBuffer();
+
+    // - Get the number of pixels per row in the actual pixel buffer data area
+    //   This may in some cases NOT be the same as width().
+    virtual int getStride() const;
+
+    // Get a pointer to specified pixel data
+    virtual rdr::U8* getPixelsRW(const Rect& r, int* stride);
+    virtual const rdr::U8* getPixelsR(const Rect& r, int* stride) {
+      return getPixelsRW(r, stride);
+    }
+
+    ///////////////////////////////////////////////
+    // Basic rendering operations
+    // These operations DO NOT clip to the pixelbuffer area, or trap overruns.
+
+    // Fill a rectangle
+    virtual void fillRect(const Rect &dest, Pixel pix);
+
+    // Copy pixel data to the buffer
+    virtual void imageRect(const Rect &dest, const void* pixels, int stride=0);
+
+    // Copy pixel data from one PixelBuffer location to another
+    virtual void copyRect(const Rect &dest, const Point &move_by_delta);
+
+    // Copy pixel data to the buffer through a mask
+    //   pixels is a pointer to the pixel to be copied to r.tl.
+    //   maskPos specifies the pixel offset in the mask to start from.
+    //   mask_ is a pointer to the mask bits at (0,0).
+    //   pStride and mStride are the strides of the pixel and mask buffers.
+    virtual void maskRect(const Rect& r, const void* pixels, const void* mask_);
+
+    //   pixel is the Pixel value to be used where mask_ is set
+    virtual void maskRect(const Rect& r, Pixel pixel, const void* mask_);
+
+    // *** Should this be visible?
+    rdr::U8* data;
+
+  protected:
+    FullFramePixelBuffer();
+  };
+
+  // -=- Managed pixel buffer class
+  // Automatically allocates enough space for the specified format & area
+
+  class ManagedPixelBuffer : public FullFramePixelBuffer {
+  public:
+    ManagedPixelBuffer();
+    ManagedPixelBuffer(const PixelFormat& pf, int width, int height);
+    virtual ~ManagedPixelBuffer();
+
+    // Manage the pixel buffer layout
+    virtual void setPF(const PixelFormat &pf);
+    virtual void setSize(int w, int h);
+
+    // Assign a colour map to the buffer
+    virtual void setColourMap(ColourMap* cm, bool own_cm);
+
+    // Return the total number of bytes of pixel data in the buffer
+    int dataLen() const { return width_ * height_ * (format.bpp/8); }
+
+  protected:
+    unsigned long datasize;
+    bool own_colourmap;
+    void checkDataSize();
+  };
+
+};
+
+#endif // __RFB_PIXEL_BUFFER_H__
diff --git a/common/rfb/PixelFormat.cxx b/common/rfb/PixelFormat.cxx
new file mode 100644
index 00000000..74b68372
--- /dev/null
+++ b/common/rfb/PixelFormat.cxx
@@ -0,0 +1,239 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <rdr/InStream.h>
+#include <rdr/OutStream.h>
+#include <rfb/PixelFormat.h>
+#include <rfb/util.h>
+
+#ifdef _WIN32
+#define strcasecmp _stricmp
+#endif
+
+using namespace rfb;
+
+PixelFormat::PixelFormat(int b, int d, bool e, bool t,
+                         int rm, int gm, int bm, int rs, int gs, int bs)
+  : bpp(b), depth(d), bigEndian(e), trueColour(t),
+    redMax(rm), greenMax(gm), blueMax(bm),
+    redShift(rs), greenShift(gs), blueShift(bs)
+{
+}
+
+PixelFormat::PixelFormat()
+  : bpp(8), depth(8), bigEndian(false), trueColour(true),
+    redMax(7), greenMax(7), blueMax(3),
+    redShift(0), greenShift(3), blueShift(6)
+{
+}
+
+bool PixelFormat::equal(const PixelFormat& other) const
+{
+  return (bpp == other.bpp &&
+          depth == other.depth &&
+          (bigEndian == other.bigEndian || bpp == 8) &&
+          trueColour == other.trueColour &&
+          (!trueColour || (redMax == other.redMax &&
+                           greenMax == other.greenMax &&
+                           blueMax == other.blueMax &&
+                           redShift == other.redShift &&
+                           greenShift == other.greenShift &&
+                           blueShift == other.blueShift)));
+}
+
+void PixelFormat::read(rdr::InStream* is)
+{
+  bpp = is->readU8();
+  depth = is->readU8();
+  bigEndian = is->readU8();
+  trueColour = is->readU8();
+  redMax = is->readU16();
+  greenMax = is->readU16();
+  blueMax = is->readU16();
+  redShift = is->readU8();
+  greenShift = is->readU8();
+  blueShift = is->readU8();
+  is->skip(3);
+}
+
+void PixelFormat::write(rdr::OutStream* os) const
+{
+  os->writeU8(bpp);
+  os->writeU8(depth);
+  os->writeU8(bigEndian);
+  os->writeU8(trueColour);
+  os->writeU16(redMax);
+  os->writeU16(greenMax);
+  os->writeU16(blueMax);
+  os->writeU8(redShift);
+  os->writeU8(greenShift);
+  os->writeU8(blueShift);
+  os->pad(3);
+}
+
+Pixel PixelFormat::pixelFromRGB(rdr::U16 red, rdr::U16 green, rdr::U16 blue,
+                                ColourMap* cm) const
+{
+  if (trueColour) {
+    rdr::U32 r = ((rdr::U32)red   * redMax   + 32767) / 65535;
+    rdr::U32 g = ((rdr::U32)green * greenMax + 32767) / 65535;
+    rdr::U32 b = ((rdr::U32)blue  * blueMax  + 32767) / 65535;
+
+    return (r << redShift) | (g << greenShift) | (b << blueShift);
+  } else if (cm) {
+    // Try to find the closest pixel by Cartesian distance
+    int colours = 1 << depth;
+    int diff = 256 * 256 * 4;
+    int col = 0;
+    for (int i=0; i<colours; i++) {
+      int r, g, b;
+      cm->lookup(i, &r, &g, &b);
+      int rd = (r-red) >> 8;
+      int gd = (g-green) >> 8;
+      int bd = (b-blue) >> 8;
+      int d = rd*rd + gd*gd + bd*bd;
+      if (d < diff) {
+        col = i;
+        diff = d;
+      }
+    }
+    return col;
+  }
+  // XXX just return 0 for colour map?
+  return 0;
+}
+
+
+void PixelFormat::rgbFromPixel(Pixel p, ColourMap* cm, Colour* rgb) const
+{
+  if (trueColour) {
+    rgb->r = (((p >> redShift  ) & redMax  ) * 65535 + redMax  /2) / redMax;
+    rgb->g = (((p >> greenShift) & greenMax) * 65535 + greenMax/2) / greenMax;
+    rgb->b = (((p >> blueShift ) & blueMax ) * 65535 + blueMax /2) / blueMax;
+  } else {
+    cm->lookup(p, &rgb->r, &rgb->g, &rgb->b);
+  }
+}
+
+
+void PixelFormat::print(char* str, int len) const
+{
+  // Unfortunately snprintf is not widely available so we build the string up
+  // using strncat - not pretty, but should be safe against buffer overruns.
+
+  char num[20];
+  if (len < 1) return;
+  str[0] = 0;
+  strncat(str, "depth ", len-1-strlen(str));
+  sprintf(num,"%d",depth);
+  strncat(str, num, len-1-strlen(str));
+  strncat(str, " (", len-1-strlen(str));
+  sprintf(num,"%d",bpp);
+  strncat(str, num, len-1-strlen(str));
+  strncat(str, "bpp)", len-1-strlen(str));
+  if (bpp != 8) {
+    if (bigEndian)
+      strncat(str, " big-endian", len-1-strlen(str));
+    else
+      strncat(str, " little-endian", len-1-strlen(str));
+  }
+
+  if (!trueColour) {
+    strncat(str, " color-map", len-1-strlen(str));
+    return;
+  }
+
+  if (blueShift == 0 && greenShift > blueShift && redShift > greenShift &&
+      blueMax  == (1 << greenShift) - 1 &&
+      greenMax == (1 << (redShift-greenShift)) - 1 &&
+      redMax   == (1 << (depth-redShift)) - 1)
+  {
+    strncat(str, " rgb", len-1-strlen(str));
+    sprintf(num,"%d",depth-redShift);
+    strncat(str, num, len-1-strlen(str));
+    sprintf(num,"%d",redShift-greenShift);
+    strncat(str, num, len-1-strlen(str));
+    sprintf(num,"%d",greenShift);
+    strncat(str, num, len-1-strlen(str));
+    return;
+  }
+
+  if (redShift == 0 && greenShift > redShift && blueShift > greenShift &&
+      redMax   == (1 << greenShift) - 1 &&
+      greenMax == (1 << (blueShift-greenShift)) - 1 &&
+      blueMax  == (1 << (depth-blueShift)) - 1)
+  {
+    strncat(str, " bgr", len-1-strlen(str));
+    sprintf(num,"%d",depth-blueShift);
+    strncat(str, num, len-1-strlen(str));
+    sprintf(num,"%d",blueShift-greenShift);
+    strncat(str, num, len-1-strlen(str));
+    sprintf(num,"%d",greenShift);
+    strncat(str, num, len-1-strlen(str));
+    return;
+  }
+
+  strncat(str, " rgb max ", len-1-strlen(str));
+  sprintf(num,"%d,",redMax);
+  strncat(str, num, len-1-strlen(str));
+  sprintf(num,"%d,",greenMax);
+  strncat(str, num, len-1-strlen(str));
+  sprintf(num,"%d",blueMax);
+  strncat(str, num, len-1-strlen(str));
+  strncat(str, " shift ", len-1-strlen(str));
+  sprintf(num,"%d,",redShift);
+  strncat(str, num, len-1-strlen(str));
+  sprintf(num,"%d,",greenShift);
+  strncat(str, num, len-1-strlen(str));
+  sprintf(num,"%d",blueShift);
+  strncat(str, num, len-1-strlen(str));
+}
+
+
+bool PixelFormat::parse(const char* str)
+{
+  char rgbbgr[4];
+  int bits1, bits2, bits3;
+  if (sscanf(str, "%3s%1d%1d%1d", rgbbgr, &bits1, &bits2, &bits3) < 4)
+    return false;
+  
+  depth = bits1 + bits2 + bits3;
+  bpp = depth <= 8 ? 8 : ((depth <= 16) ? 16 : 32);
+  trueColour = true;
+  rdr::U32 endianTest = 1;
+  bigEndian = (*(rdr::U8*)&endianTest == 0);
+
+  greenShift = bits3;
+  greenMax = (1 << bits2) - 1;
+
+  if (strcasecmp(rgbbgr, "bgr") == 0) {
+    redShift = 0;
+    redMax = (1 << bits3) - 1;
+    blueShift = bits3 + bits2;
+    blueMax = (1 << bits1) - 1;
+  } else if (strcasecmp(rgbbgr, "rgb") == 0) {
+    blueShift = 0;
+    blueMax = (1 << bits3) - 1;
+    redShift = bits3 + bits2;
+    redMax = (1 << bits1) - 1;
+  } else {
+    return false;
+  }
+  return true;
+}
diff --git a/common/rfb/PixelFormat.h b/common/rfb/PixelFormat.h
new file mode 100644
index 00000000..111c38cb
--- /dev/null
+++ b/common/rfb/PixelFormat.h
@@ -0,0 +1,58 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// PixelFormat - structure to represent a pixel format.  Also has useful
+// methods for reading & writing to streams, etc.
+//
+
+#ifndef __RFB_PIXELFORMAT_H__
+#define __RFB_PIXELFORMAT_H__
+
+#include <rfb/Pixel.h>
+#include <rfb/ColourMap.h>
+
+namespace rdr { class InStream; class OutStream; }
+
+namespace rfb {
+
+  class PixelFormat {
+  public:
+    PixelFormat(int b, int d, bool e, bool t,
+                int rm=0, int gm=0, int bm=0, int rs=0, int gs=0, int bs=0);
+    PixelFormat();
+    bool equal(const PixelFormat& other) const;
+    void read(rdr::InStream* is);
+    void write(rdr::OutStream* os) const;
+    Pixel pixelFromRGB(rdr::U16 red, rdr::U16 green, rdr::U16 blue, ColourMap* cm=0) const;
+    void rgbFromPixel(Pixel pix, ColourMap* cm, Colour* rgb) const;
+    void print(char* str, int len) const;
+    bool parse(const char* str);
+
+    int bpp;
+    int depth;
+    bool bigEndian;
+    bool trueColour;
+    int redMax;
+    int greenMax;
+    int blueMax;
+    int redShift;
+    int greenShift;
+    int blueShift;
+  };
+}
+#endif
diff --git a/common/rfb/RREDecoder.cxx b/common/rfb/RREDecoder.cxx
new file mode 100644
index 00000000..da56ee7c
--- /dev/null
+++ b/common/rfb/RREDecoder.cxx
@@ -0,0 +1,58 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/CMsgReader.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/RREDecoder.h>
+
+using namespace rfb;
+
+#define EXTRA_ARGS CMsgHandler* handler
+#define FILL_RECT(r, p) handler->fillRect(r, p)
+#define IMAGE_RECT(r, p) handler->imageRect(r, p)
+#define BPP 8
+#include <rfb/rreDecode.h>
+#undef BPP
+#define BPP 16
+#include <rfb/rreDecode.h>
+#undef BPP
+#define BPP 32
+#include <rfb/rreDecode.h>
+#undef BPP
+
+Decoder* RREDecoder::create(CMsgReader* reader)
+{
+  return new RREDecoder(reader);
+}
+
+RREDecoder::RREDecoder(CMsgReader* reader_) : reader(reader_)
+{
+}
+
+RREDecoder::~RREDecoder()
+{
+}
+
+void RREDecoder::readRect(const Rect& r, CMsgHandler* handler)
+{
+  rdr::InStream* is = reader->getInStream();
+  switch (reader->bpp()) {
+  case 8:  rreDecode8 (r, is, handler); break;
+  case 16: rreDecode16(r, is, handler); break;
+  case 32: rreDecode32(r, is, handler); break;
+  }
+}
diff --git a/common/rfb/RREDecoder.h b/common/rfb/RREDecoder.h
new file mode 100644
index 00000000..2309f754
--- /dev/null
+++ b/common/rfb/RREDecoder.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_RREDECODER_H__
+#define __RFB_RREDECODER_H__
+
+#include <rfb/Decoder.h>
+
+namespace rfb {
+
+  class RREDecoder : public Decoder {
+  public:
+    static Decoder* create(CMsgReader* reader);
+    virtual void readRect(const Rect& r, CMsgHandler* handler);
+    virtual ~RREDecoder();
+  private:
+    RREDecoder(CMsgReader* reader);
+    CMsgReader* reader;
+  };
+}
+#endif
diff --git a/common/rfb/RREEncoder.cxx b/common/rfb/RREEncoder.cxx
new file mode 100644
index 00000000..b000e9d3
--- /dev/null
+++ b/common/rfb/RREEncoder.cxx
@@ -0,0 +1,75 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/OutStream.h>
+#include <rfb/ImageGetter.h>
+#include <rfb/encodings.h>
+#include <rfb/SMsgWriter.h>
+#include <rfb/RREEncoder.h>
+
+using namespace rfb;
+
+#define BPP 8
+#include <rfb/rreEncode.h>
+#undef BPP
+#define BPP 16
+#include <rfb/rreEncode.h>
+#undef BPP
+#define BPP 32
+#include <rfb/rreEncode.h>
+#undef BPP
+
+Encoder* RREEncoder::create(SMsgWriter* writer)
+{
+  return new RREEncoder(writer);
+}
+
+RREEncoder::RREEncoder(SMsgWriter* writer_) : writer(writer_)
+{
+}
+
+RREEncoder::~RREEncoder()
+{
+}
+
+bool RREEncoder::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+{
+  int w = r.width();
+  int h = r.height();
+  rdr::U8* imageBuf = writer->getImageBuf(w*h);
+  ig->getImage(imageBuf, r);
+
+  mos.clear();
+
+  int nSubrects = -1;
+  switch (writer->bpp()) {
+  case 8:  nSubrects = rreEncode8(imageBuf, w, h, &mos);  break;
+  case 16: nSubrects = rreEncode16(imageBuf, w, h, &mos); break;
+  case 32: nSubrects = rreEncode32(imageBuf, w, h, &mos); break;
+  }
+  
+  if (nSubrects < 0) {
+    return writer->writeRect(r, encodingRaw, ig, actual);
+  }
+
+  writer->startRect(r, encodingRRE);
+  rdr::OutStream* os = writer->getOutStream();
+  os->writeU32(nSubrects);
+  os->writeBytes(mos.data(), mos.length());
+  writer->endRect();
+  return true;
+}
diff --git a/common/rfb/RREEncoder.h b/common/rfb/RREEncoder.h
new file mode 100644
index 00000000..1281410d
--- /dev/null
+++ b/common/rfb/RREEncoder.h
@@ -0,0 +1,37 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_RREENCODER_H__
+#define __RFB_RREENCODER_H__
+
+#include <rdr/MemOutStream.h>
+#include <rfb/Encoder.h>
+
+namespace rfb {
+
+  class RREEncoder : public Encoder {
+  public:
+    static Encoder* create(SMsgWriter* writer);
+    virtual bool writeRect(const Rect& r, ImageGetter* ig, Rect* actual);
+    virtual ~RREEncoder();
+  private:
+    RREEncoder(SMsgWriter* writer);
+    SMsgWriter* writer;
+    rdr::MemOutStream mos;
+  };
+}
+#endif
diff --git a/common/rfb/RawDecoder.cxx b/common/rfb/RawDecoder.cxx
new file mode 100644
index 00000000..57cb37bc
--- /dev/null
+++ b/common/rfb/RawDecoder.cxx
@@ -0,0 +1,55 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/InStream.h>
+#include <rfb/CMsgReader.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/RawDecoder.h>
+
+using namespace rfb;
+
+Decoder* RawDecoder::create(CMsgReader* reader)
+{
+  return new RawDecoder(reader);
+}
+
+RawDecoder::RawDecoder(CMsgReader* reader_) : reader(reader_)
+{
+}
+
+RawDecoder::~RawDecoder()
+{
+}
+
+void RawDecoder::readRect(const Rect& r, CMsgHandler* handler)
+{
+  int x = r.tl.x;
+  int y = r.tl.y;
+  int w = r.width();
+  int h = r.height();
+  int nPixels;
+  rdr::U8* imageBuf = reader->getImageBuf(w, w*h, &nPixels);
+  int bytesPerRow = w * (reader->bpp() / 8);
+  while (h > 0) {
+    int nRows = nPixels / w;
+    if (nRows > h) nRows = h;
+    reader->getInStream()->readBytes(imageBuf, nRows * bytesPerRow);
+    handler->imageRect(Rect(x, y, x+w, y+nRows), imageBuf);
+    h -= nRows;
+    y += nRows;
+  }
+}
diff --git a/common/rfb/RawDecoder.h b/common/rfb/RawDecoder.h
new file mode 100644
index 00000000..9fdbb220
--- /dev/null
+++ b/common/rfb/RawDecoder.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_RAWDECODER_H__
+#define __RFB_RAWDECODER_H__
+
+#include <rfb/Decoder.h>
+
+namespace rfb {
+
+  class RawDecoder : public Decoder {
+  public:
+    static Decoder* create(CMsgReader* reader);
+    virtual void readRect(const Rect& r, CMsgHandler* handler);
+    virtual ~RawDecoder();
+  private:
+    RawDecoder(CMsgReader* reader);
+    CMsgReader* reader;
+  };
+}
+#endif
diff --git a/common/rfb/RawEncoder.cxx b/common/rfb/RawEncoder.cxx
new file mode 100644
index 00000000..a2545b61
--- /dev/null
+++ b/common/rfb/RawEncoder.cxx
@@ -0,0 +1,59 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/OutStream.h>
+#include <rfb/ImageGetter.h>
+#include <rfb/encodings.h>
+#include <rfb/SMsgWriter.h>
+#include <rfb/RawEncoder.h>
+
+using namespace rfb;
+
+Encoder* RawEncoder::create(SMsgWriter* writer)
+{
+  return new RawEncoder(writer);
+}
+
+RawEncoder::RawEncoder(SMsgWriter* writer_) : writer(writer_)
+{
+}
+
+RawEncoder::~RawEncoder()
+{
+}
+
+bool RawEncoder::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+{
+  int x = r.tl.x;
+  int y = r.tl.y;
+  int w = r.width();
+  int h = r.height();
+  int nPixels;
+  rdr::U8* imageBuf = writer->getImageBuf(w, w*h, &nPixels);
+  int bytesPerRow = w * (writer->bpp() / 8);
+  writer->startRect(r, encodingRaw);
+  while (h > 0) {
+    int nRows = nPixels / w;
+    if (nRows > h) nRows = h;
+    ig->getImage(imageBuf, Rect(x, y, x+w, y+nRows));
+    writer->getOutStream()->writeBytes(imageBuf, nRows * bytesPerRow);
+    h -= nRows;
+    y += nRows;
+  }
+  writer->endRect();
+  return true;
+}
diff --git a/common/rfb/RawEncoder.h b/common/rfb/RawEncoder.h
new file mode 100644
index 00000000..1b9ad929
--- /dev/null
+++ b/common/rfb/RawEncoder.h
@@ -0,0 +1,35 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_RAWENCODER_H__
+#define __RFB_RAWENCODER_H__
+
+#include <rfb/Encoder.h>
+
+namespace rfb {
+
+  class RawEncoder : public Encoder {
+  public:
+    static Encoder* create(SMsgWriter* writer);
+    virtual bool writeRect(const Rect& r, ImageGetter* ig, Rect* actual);
+    virtual ~RawEncoder();
+  private:
+    RawEncoder(SMsgWriter* writer);
+    SMsgWriter* writer;
+  };
+}
+#endif
diff --git a/common/rfb/Rect.h b/common/rfb/Rect.h
new file mode 100644
index 00000000..52e92b57
--- /dev/null
+++ b/common/rfb/Rect.h
@@ -0,0 +1,116 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// rfb::Rect and rfb::Point structures
+
+#ifndef __RFB_RECT_INCLUDED__
+#define __RFB_RECT_INCLUDED__
+
+// Some platforms (e.g. Windows) include max() and min() macros in their
+// standard headers, but they are also standard C++ template functions, so some
+// C++ headers will undefine them.  So we steer clear of the names min and max
+// and define __rfbmin and __rfbmax instead.
+
+#ifndef __rfbmax
+#define __rfbmax(a,b) (((a) > (b)) ? (a) : (b))
+#endif
+#ifndef __rfbmin
+#define __rfbmin(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
+namespace rfb {
+
+  // rfb::Point
+  //
+  // Represents a point in 2D space, by X and Y coordinates.
+  // Can also be used to represent a delta, or offset, between
+  // two Points.
+  // Functions are provided to allow Points to be compared for
+  // equality and translated by a supplied offset.
+  // Functions are also provided to negate offset Points.
+
+  struct Point {
+    Point() : x(0), y(0) {}
+    Point(int x_, int y_) : x(x_), y(y_) {}
+    inline Point negate() const {return Point(-x, -y);}
+    inline bool equals(const Point &p) const {return x==p.x && y==p.y;}
+    inline Point translate(const Point &p) const {return Point(x+p.x, y+p.y);}
+    inline Point subtract(const Point &p) const {return Point(x-p.x, y-p.y);}
+    int x, y;
+  };
+
+  // rfb::Rect
+  //
+  // Represents a rectangular region defined by its top-left (tl)
+  // and bottom-right (br) Points.
+  // Rects may be compared for equality, checked to determine whether
+  // or not they are empty, cleared (made empty), or intersected with
+  // one another.  The bounding rectangle of two existing Rects
+  // may be calculated, as may the area of a Rect.
+  // Rects may also be translated, in the same way as Points, by
+  // an offset specified in a Point structure.
+
+  struct Rect {
+    Rect() {}
+    Rect(Point tl_, Point br_) : tl(tl_), br(br_) {}
+    Rect(int x1, int y1, int x2, int y2) : tl(x1, y1), br(x2, y2) {}
+    inline void setXYWH(int x, int y, int w, int h) {
+      tl.x = x; tl.y = y; br.x = x+w; br.y = y+h;
+    }
+    inline Rect intersect(const Rect &r) const {
+      Rect result;
+      result.tl.x = __rfbmax(tl.x, r.tl.x);
+      result.tl.y = __rfbmax(tl.y, r.tl.y);
+      result.br.x = __rfbmax(__rfbmin(br.x, r.br.x), result.tl.x);
+      result.br.y = __rfbmax(__rfbmin(br.y, r.br.y), result.tl.y);
+      return result;
+    }
+    inline Rect union_boundary(const Rect &r) const {
+      if (r.is_empty()) return *this;
+      if (is_empty()) return r;
+      Rect result;
+      result.tl.x = __rfbmin(tl.x, r.tl.x);
+      result.tl.y = __rfbmin(tl.y, r.tl.y);
+      result.br.x = __rfbmax(br.x, r.br.x);
+      result.br.y = __rfbmax(br.y, r.br.y);
+      return result;
+    }
+    inline Rect translate(const Point &p) const {
+      return Rect(tl.translate(p), br.translate(p));
+    }
+    inline bool equals(const Rect &r) const {return r.tl.equals(tl) && r.br.equals(br);}
+    inline bool is_empty() const {return (tl.x >= br.x) || (tl.y >= br.y);}
+    inline void clear() {tl = Point(); br = Point();}
+    inline bool enclosed_by(const Rect &r) const {
+      return (tl.x>=r.tl.x) && (tl.y>=r.tl.y) && (br.x<=r.br.x) && (br.y<=r.br.y);
+    }
+    inline bool overlaps(const Rect &r) const {
+      return tl.x < r.br.x && tl.y < r.br.y && br.x > r.tl.x && br.y > r.tl.y;
+    }
+    inline unsigned int area() const {return is_empty() ? 0 : (br.x-tl.x)*(br.y-tl.y);}
+    inline Point dimensions() const {return Point(width(), height());}
+    inline int width() const {return br.x-tl.x;}
+    inline int height() const {return br.y-tl.y;}
+    inline bool contains(const Point &p) const {
+      return (tl.x<=p.x) && (tl.y<=p.y) && (br.x>p.x) && (br.y>p.y);
+    }
+    Point tl;
+    Point br;
+  };
+}
+#endif // __RFB_RECT_INCLUDED__
diff --git a/common/rfb/Region.cxx b/common/rfb/Region.cxx
new file mode 100644
index 00000000..7965a6c4
--- /dev/null
+++ b/common/rfb/Region.cxx
@@ -0,0 +1,248 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// Cross-platform Region class based on the X11 region implementation.  Note
+// that for efficiency this code manipulates the Xlib region structure
+// directly.  Apart from the layout of the structure, there is one other key
+// assumption made: a Region returned from XCreateRegion must always have its
+// rects member allocated so that there is space for at least one rectangle.
+//
+
+#include <rfb/Region.h>
+#include <Xregion/Xregion.h>
+#include <Xregion/region.h>
+#include <assert.h>
+#include <stdio.h>
+
+// A _RectRegion must never be passed as a return parameter to the Xlib region
+// operations.  This is because for efficiency its "rects" member has not been
+// allocated with Xmalloc.  It is however safe to pass it as an input
+// parameter.
+
+class _RectRegion {
+public:
+  _RectRegion(const rfb::Rect& r) {
+    region.rects = &region.extents;
+    region.numRects = 1;
+    region.extents.x1 = r.tl.x;
+    region.extents.y1 = r.tl.y;
+    region.extents.x2 = r.br.x;
+    region.extents.y2 = r.br.y;
+    region.size = 1;
+    if (r.is_empty())
+      region.numRects = 0;
+  }
+  REGION region;
+};
+
+
+rfb::Region::Region() {
+  xrgn = XCreateRegion();
+  assert(xrgn);
+}
+
+rfb::Region::Region(const Rect& r) {
+  xrgn = XCreateRegion();
+  assert(xrgn);
+  reset(r);
+}
+
+rfb::Region::Region(const rfb::Region& r) {
+  xrgn = XCreateRegion();
+  assert(xrgn);
+  XUnionRegion(xrgn, r.xrgn, xrgn);
+}
+
+rfb::Region::~Region() {
+  XDestroyRegion(xrgn);
+}
+
+rfb::Region& rfb::Region::operator=(const rfb::Region& r) {
+  clear();
+  XUnionRegion(xrgn, r.xrgn, xrgn);
+  return *this;
+}
+
+void rfb::Region::clear() {
+  xrgn->numRects = 0;
+  xrgn->extents.x1 = 0;
+  xrgn->extents.y1 = 0;
+  xrgn->extents.x2 = 0;
+  xrgn->extents.y2 = 0;
+}
+
+void rfb::Region::reset(const Rect& r) {
+  if (r.is_empty()) {
+    clear();
+  } else {
+    xrgn->numRects = 1;
+    xrgn->rects[0].x1 = xrgn->extents.x1 = r.tl.x;
+    xrgn->rects[0].y1 = xrgn->extents.y1 = r.tl.y;
+    xrgn->rects[0].x2 = xrgn->extents.x2 = r.br.x;
+    xrgn->rects[0].y2 = xrgn->extents.y2 = r.br.y;
+  }
+}
+
+void rfb::Region::translate(const Point& delta) {
+  XOffsetRegion(xrgn, delta.x, delta.y);
+}
+
+void rfb::Region::setOrderedRects(const std::vector<Rect>& rects) {
+  clear();
+  std::vector<Rect>::const_iterator i;
+  for (i=rects.begin(); i != rects.end(); i++) {
+    _RectRegion rr(*i);
+    XUnionRegion(xrgn, &rr.region, xrgn);
+  }
+}
+
+void rfb::Region::setExtentsAndOrderedRects(const ShortRect* extents,
+                                            int nRects, const ShortRect* rects)
+{
+  if (xrgn->size < nRects)
+  {
+    BOX* prevRects = xrgn->rects;
+    xrgn->rects = (BOX*)Xrealloc((char*)xrgn->rects, nRects * sizeof(BOX));
+    if (!xrgn->rects) {
+      fprintf(stderr,"Xrealloc failed\n");
+      Xfree(prevRects);
+      return;
+    }
+    xrgn->size = nRects;
+  }
+
+  xrgn->numRects = nRects;
+  xrgn->extents.x1 = extents->x1;
+  xrgn->extents.y1 = extents->y1;
+  xrgn->extents.x2 = extents->x2;
+  xrgn->extents.y2 = extents->y2;
+  for (int i = 0; i < nRects; i++) {
+    xrgn->rects[i].x1 = rects[i].x1;
+    xrgn->rects[i].y1 = rects[i].y1;
+    xrgn->rects[i].x2 = rects[i].x2;
+    xrgn->rects[i].y2 = rects[i].y2;
+  }
+}
+
+void rfb::Region::copyFrom(const rfb::Region& r) {
+  XUnionRegion(r.xrgn, r.xrgn, xrgn);
+}
+
+void rfb::Region::assign_intersect(const rfb::Region& r) {
+  XIntersectRegion(xrgn, r.xrgn, xrgn);
+}
+
+void rfb::Region::assign_union(const rfb::Region& r) {
+  XUnionRegion(xrgn, r.xrgn, xrgn);
+}
+
+void rfb::Region::assign_subtract(const rfb::Region& r) {
+  XSubtractRegion(xrgn, r.xrgn, xrgn);
+}
+
+rfb::Region rfb::Region::intersect(const rfb::Region& r) const {
+  rfb::Region ret;
+  XIntersectRegion(xrgn, r.xrgn, ret.xrgn);
+  return ret;
+}
+
+rfb::Region rfb::Region::union_(const rfb::Region& r) const {
+  rfb::Region ret;
+  XUnionRegion(xrgn, r.xrgn, ret.xrgn);
+  return ret;
+}
+
+rfb::Region rfb::Region::subtract(const rfb::Region& r) const {
+  rfb::Region ret;
+  XSubtractRegion(xrgn, r.xrgn, ret.xrgn);
+  return ret;
+}
+
+bool rfb::Region::equals(const rfb::Region& r) const {
+  return XEqualRegion(xrgn, r.xrgn);
+}
+
+int rfb::Region::numRects() const {
+  return xrgn->numRects;
+}
+
+bool rfb::Region::get_rects(std::vector<Rect>* rects,
+                            bool left2right, bool topdown, int maxArea) const
+{
+  int nRects = xrgn->numRects;
+  int xInc = left2right ? 1 : -1;
+  int yInc = topdown ? 1 : -1;
+  int i = topdown ? 0 : nRects-1;
+  rects->clear();
+  rects->reserve(nRects);
+
+  while (nRects > 0) {
+    int firstInNextBand = i;
+    int nRectsInBand = 0;
+
+    while (nRects > 0 && xrgn->rects[firstInNextBand].y1 == xrgn->rects[i].y1)
+    {
+      firstInNextBand += yInc;
+      nRects--;
+      nRectsInBand++;
+    }
+
+    if (xInc != yInc)
+      i = firstInNextBand - yInc;
+
+    while (nRectsInBand > 0) {
+      int y = xrgn->rects[i].y1;
+      int h = maxArea / (xrgn->rects[i].x2 - xrgn->rects[i].x1);
+      if (!h) h = xrgn->rects[i].y2 - y;
+      do {
+        if (h > xrgn->rects[i].y2 - y)
+          h = xrgn->rects[i].y2 - y;
+        Rect r(xrgn->rects[i].x1, y, xrgn->rects[i].x2, y+h);
+        rects->push_back(r);
+        y += h;
+      } while (y < xrgn->rects[i].y2);
+      i += xInc;
+      nRectsInBand--;
+    }
+
+    i = firstInNextBand;
+  }
+
+  return !rects->empty();
+}
+
+rfb::Rect rfb::Region::get_bounding_rect() const {
+  return Rect(xrgn->extents.x1, xrgn->extents.y1,
+              xrgn->extents.x2, xrgn->extents.y2);
+}
+
+
+void rfb::Region::debug_print(const char* prefix) const
+{
+  fprintf(stderr,"%s num rects %3ld extents %3d,%3d %3dx%3d\n",
+          prefix, xrgn->numRects, xrgn->extents.x1, xrgn->extents.y1,
+          xrgn->extents.x2-xrgn->extents.x1,
+          xrgn->extents.y2-xrgn->extents.y1);
+
+  for (int i = 0; i < xrgn->numRects; i++) {
+    fprintf(stderr,"    rect %3d,%3d %3dx%3d\n",
+            xrgn->rects[i].x1, xrgn->rects[i].y1,
+            xrgn->rects[i].x2-xrgn->rects[i].x1,
+            xrgn->rects[i].y2-xrgn->rects[i].y1);
+  }
+}
diff --git a/common/rfb/Region.h b/common/rfb/Region.h
new file mode 100644
index 00000000..93375569
--- /dev/null
+++ b/common/rfb/Region.h
@@ -0,0 +1,84 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// Cross-platform Region class based on the X11 region implementation
+
+#ifndef __RFB_REGION_INCLUDED__
+#define __RFB_REGION_INCLUDED__
+
+#include <rfb/Rect.h>
+#include <vector>
+
+struct _XRegion;
+
+namespace rfb {
+
+  struct ShortRect {
+    short x1, y1, x2, y2;
+  };
+
+  class Region {
+  public:
+    // Create an empty region
+    Region();
+    // Create a rectangular region
+    Region(const Rect& r);
+
+    Region(const Region& r);
+    Region &operator=(const Region& src);
+
+    ~Region();
+
+    // the following methods alter the region in place:
+
+    void clear();
+    void reset(const Rect& r);
+    void translate(const rfb::Point& delta);
+    void setOrderedRects(const std::vector<Rect>& rects);
+    void setExtentsAndOrderedRects(const ShortRect* extents, int nRects,
+                                   const ShortRect* rects);
+    void copyFrom(const Region& r);
+
+    void assign_intersect(const Region& r);
+    void assign_union(const Region& r);
+    void assign_subtract(const Region& r);
+
+    // the following three operations return a new region:
+
+    Region intersect(const Region& r) const;
+    Region union_(const Region& r) const;
+    Region subtract(const Region& r) const;
+
+    bool equals(const Region& b) const;
+    int numRects() const;
+    bool is_empty() const { return numRects() == 0; }
+
+    bool get_rects(std::vector<Rect>* rects, bool left2right=true,
+                   bool topdown=true, int maxArea=0) const;
+    Rect get_bounding_rect() const;
+
+    void debug_print(const char *prefix) const;
+
+  protected:
+
+    struct _XRegion* xrgn;
+  };
+
+};
+
+#endif // __RFB_REGION_INCLUDED__
diff --git a/common/rfb/SConnection.cxx b/common/rfb/SConnection.cxx
new file mode 100644
index 00000000..1422b546
--- /dev/null
+++ b/common/rfb/SConnection.cxx
@@ -0,0 +1,322 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <rfb/Exception.h>
+#include <rfb/secTypes.h>
+#include <rfb/SMsgReaderV3.h>
+#include <rfb/SMsgWriterV3.h>
+#include <rfb/SConnection.h>
+#include <rfb/ServerCore.h>
+
+#include <rfb/LogWriter.h>
+
+using namespace rfb;
+
+static LogWriter vlog("SConnection");
+
+// AccessRights values
+const SConnection::AccessRights SConnection::AccessView       = 0x0001;
+const SConnection::AccessRights SConnection::AccessKeyEvents  = 0x0002;
+const SConnection::AccessRights SConnection::AccessPtrEvents  = 0x0004;
+const SConnection::AccessRights SConnection::AccessCutText    = 0x0008;
+const SConnection::AccessRights SConnection::AccessDefault    = 0x03ff;
+const SConnection::AccessRights SConnection::AccessNoQuery    = 0x0400;
+const SConnection::AccessRights SConnection::AccessFull       = 0xffff;
+
+
+SConnection::SConnection(SSecurityFactory* secFact, bool reverseConnection_)
+  : readyForSetColourMapEntries(false),
+    is(0), os(0), reader_(0), writer_(0),
+    security(0), securityFactory(secFact), state_(RFBSTATE_UNINITIALISED),
+    reverseConnection(reverseConnection_)
+{
+  defaultMajorVersion = 3;
+  defaultMinorVersion = 8;
+  if (rfb::Server::protocol3_3)
+    defaultMinorVersion = 3;
+
+  cp.setVersion(defaultMajorVersion, defaultMinorVersion);
+}
+
+SConnection::~SConnection()
+{
+  if (security) security->destroy();
+  deleteReaderAndWriter();
+}
+
+void SConnection::deleteReaderAndWriter()
+{
+  delete reader_;
+  reader_ = 0;
+  delete writer_;
+  writer_ = 0;
+}
+
+void SConnection::setStreams(rdr::InStream* is_, rdr::OutStream* os_)
+{
+  is = is_;
+  os = os_;
+}
+
+void SConnection::initialiseProtocol()
+{
+  cp.writeVersion(os);
+  state_ = RFBSTATE_PROTOCOL_VERSION;
+}
+
+void SConnection::processMsg()
+{
+  switch (state_) {
+  case RFBSTATE_PROTOCOL_VERSION: processVersionMsg();      break;
+  case RFBSTATE_SECURITY_TYPE:    processSecurityTypeMsg(); break;
+  case RFBSTATE_SECURITY:         processSecurityMsg();     break;
+  case RFBSTATE_INITIALISATION:   processInitMsg();         break;
+  case RFBSTATE_NORMAL:           reader_->readMsg();       break;
+  case RFBSTATE_QUERYING:
+    throw Exception("SConnection::processMsg: bogus data from client while "
+                    "querying");
+  case RFBSTATE_UNINITIALISED:
+    throw Exception("SConnection::processMsg: not initialised yet?");
+  default:
+    throw Exception("SConnection::processMsg: invalid state");
+  }
+}
+
+void SConnection::processVersionMsg()
+{
+  vlog.debug("reading protocol version");
+  bool done;
+  if (!cp.readVersion(is, &done)) {
+    state_ = RFBSTATE_INVALID;
+    throw Exception("reading version failed: not an RFB client?");
+  }
+  if (!done) return;
+
+  vlog.info("Client needs protocol version %d.%d",
+            cp.majorVersion, cp.minorVersion);
+
+  if (cp.majorVersion != 3) {
+    // unknown protocol version
+    char msg[256];
+    sprintf(msg,"Error: client needs protocol version %d.%d, server has %d.%d",
+            cp.majorVersion, cp.minorVersion,
+            defaultMajorVersion, defaultMinorVersion);
+    throwConnFailedException(msg);
+  }
+
+  if (cp.minorVersion != 3 && cp.minorVersion != 7 && cp.minorVersion != 8) {
+    vlog.error("Client uses unofficial protocol version %d.%d",
+               cp.majorVersion,cp.minorVersion);
+    if (cp.minorVersion >= 8)
+      cp.minorVersion = 8;
+    else if (cp.minorVersion == 7)
+      cp.minorVersion = 7;
+    else
+      cp.minorVersion = 3;
+    vlog.error("Assuming compatibility with version %d.%d",
+               cp.majorVersion,cp.minorVersion);
+  }
+
+  versionReceived();
+
+  std::list<rdr::U8> secTypes;
+  std::list<rdr::U8>::iterator i;
+  securityFactory->getSecTypes(&secTypes, reverseConnection);
+
+  if (cp.isVersion(3,3)) {
+
+    // cope with legacy 3.3 client only if "no authentication" or "vnc
+    // authentication" is supported.
+    for (i=secTypes.begin(); i!=secTypes.end(); i++) {
+      if (*i == secTypeNone || *i == secTypeVncAuth) break;
+    }
+    if (i == secTypes.end()) {
+      char msg[256];
+      sprintf(msg,"No supported security type for %d.%d client",
+              cp.majorVersion, cp.minorVersion);
+      throwConnFailedException(msg);
+    }
+
+    os->writeU32(*i);
+    if (*i == secTypeNone) os->flush();
+    state_ = RFBSTATE_SECURITY;
+    security = securityFactory->getSSecurity(*i, reverseConnection);
+    processSecurityMsg();
+    return;
+  }
+
+  // list supported security types for >=3.7 clients
+
+  if (secTypes.empty())
+    throwConnFailedException("No supported security types");
+
+  os->writeU8(secTypes.size());
+  for (i=secTypes.begin(); i!=secTypes.end(); i++)
+    os->writeU8(*i);
+  os->flush();
+  state_ = RFBSTATE_SECURITY_TYPE;
+}
+
+
+void SConnection::processSecurityTypeMsg()
+{
+  vlog.debug("processing security type message");
+  int secType = is->readU8();
+
+  // Verify that the requested security type should be offered
+  std::list<rdr::U8> secTypes;
+  std::list<rdr::U8>::iterator i;
+  securityFactory->getSecTypes(&secTypes, reverseConnection);
+  for (i=secTypes.begin(); i!=secTypes.end(); i++)
+    if (*i == secType) break;
+  if (i == secTypes.end())
+    throw Exception("Requested security type not available");
+
+  vlog.info("Client requests security type %s(%d)",
+            secTypeName(secType),secType);
+
+  try {
+    state_ = RFBSTATE_SECURITY;
+    security = securityFactory->getSSecurity(secType, reverseConnection);
+  } catch (rdr::Exception& e) {
+    throwConnFailedException(e.str());
+  }
+
+  processSecurityMsg();
+}
+
+void SConnection::processSecurityMsg()
+{
+  vlog.debug("processing security message");
+  try {
+    bool done = security->processMsg(this);
+    if (done) {
+      state_ = RFBSTATE_QUERYING;
+      queryConnection(security->getUserName());
+    }
+  } catch (AuthFailureException& e) {
+    vlog.error("AuthFailureException: %s", e.str());
+    os->writeU32(secResultFailed);
+    if (!cp.beforeVersion(3,8)) // 3.8 onwards have failure message
+      os->writeString(e.str());
+    os->flush();
+    throw;
+  }
+}
+
+void SConnection::processInitMsg()
+{
+  vlog.debug("reading client initialisation");
+  reader_->readClientInit();
+}
+
+void SConnection::throwConnFailedException(const char* msg)
+{
+  vlog.info(msg);
+  if (state_ == RFBSTATE_PROTOCOL_VERSION) {
+    if (cp.majorVersion == 3 && cp.minorVersion == 3) {
+      os->writeU32(0);
+      os->writeString(msg);
+      os->flush();
+    } else {
+      os->writeU8(0);
+      os->writeString(msg);
+      os->flush();
+    }
+  }
+  state_ = RFBSTATE_INVALID;
+  throw ConnFailedException(msg);
+}
+
+void SConnection::writeConnFailedFromScratch(const char* msg,
+                                             rdr::OutStream* os)
+{
+  os->writeBytes("RFB 003.003\n", 12);
+  os->writeU32(0);
+  os->writeString(msg);
+  os->flush();
+}
+
+void SConnection::versionReceived()
+{
+}
+
+void SConnection::authSuccess()
+{
+}
+
+void SConnection::queryConnection(const char* userName)
+{
+  approveConnection(true);
+}
+
+void SConnection::approveConnection(bool accept, const char* reason)
+{
+  if (state_ != RFBSTATE_QUERYING)
+    throw Exception("SConnection::approveConnection: invalid state");
+
+  if (!reason) reason = "Authentication failure";
+
+  if (!cp.beforeVersion(3,8) || security->getType() != secTypeNone) {
+    if (accept) {
+      os->writeU32(secResultOK);
+    } else {
+      os->writeU32(secResultFailed);
+      if (!cp.beforeVersion(3,8)) // 3.8 onwards have failure message
+        os->writeString(reason);
+    }
+    os->flush();
+  }
+
+  if (accept) {
+    state_ = RFBSTATE_INITIALISATION;
+    reader_ = new SMsgReaderV3(this, is);
+    writer_ = new SMsgWriterV3(&cp, os);
+    authSuccess();
+  } else {
+    state_ = RFBSTATE_INVALID;
+    throw AuthFailureException(reason);
+  }
+}
+
+void SConnection::setInitialColourMap()
+{
+}
+
+void SConnection::clientInit(bool shared)
+{
+  writer_->writeServerInit();
+  state_ = RFBSTATE_NORMAL;
+}
+
+void SConnection::setPixelFormat(const PixelFormat& pf)
+{
+  SMsgHandler::setPixelFormat(pf);
+  readyForSetColourMapEntries = true;
+}
+
+void SConnection::framebufferUpdateRequest(const Rect& r, bool incremental)
+{
+  if (!readyForSetColourMapEntries) {
+    readyForSetColourMapEntries = true;
+    if (!cp.pf().trueColour) {
+      setInitialColourMap();
+    }
+  }
+}
diff --git a/common/rfb/SConnection.h b/common/rfb/SConnection.h
new file mode 100644
index 00000000..6b943f5e
--- /dev/null
+++ b/common/rfb/SConnection.h
@@ -0,0 +1,193 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// SConnection - class on the server side representing a connection to a
+// client.  A derived class should override methods appropriately.
+//
+
+#ifndef __RFB_SCONNECTION_H__
+#define __RFB_SCONNECTION_H__
+
+#include <rdr/InStream.h>
+#include <rdr/OutStream.h>
+#include <rfb/SMsgHandler.h>
+#include <rfb/SSecurity.h>
+
+namespace rfb {
+
+  class SMsgReader;
+  class SMsgWriter;
+  class SSecurity;
+
+  class SConnection : public SMsgHandler {
+  public:
+
+    SConnection(SSecurityFactory* sf, bool reverseConnection_);
+    virtual ~SConnection();
+
+    // Methods to initialise the connection
+
+    // setStreams() sets the streams to be used for the connection.  These must
+    // be set before initialiseProtocol() and processMsg() are called.  The
+    // SSecurity object may call setStreams() again to provide alternative
+    // streams over which the RFB protocol is sent (i.e. encrypting/decrypting
+    // streams).  Ownership of the streams remains with the caller
+    // (i.e. SConnection will not delete them).
+    void setStreams(rdr::InStream* is, rdr::OutStream* os);
+
+    // initialiseProtocol() should be called once the streams and security
+    // types are set.  Subsequently, processMsg() should be called whenever
+    // there is data to read on the InStream.
+    void initialiseProtocol();
+
+    // processMsg() should be called whenever there is data to read on the
+    // InStream.  You must have called initialiseProtocol() first.
+    void processMsg();
+
+    // approveConnection() is called to either accept or reject the connection.
+    // If accept is false, the reason string gives the reason for the
+    // rejection.  It can either be called directly from queryConnection() or
+    // later, after queryConnection() has returned.  It can only be called when
+    // in state RFBSTATE_QUERYING.  On rejection, an AuthFailureException is
+    // thrown, so this must be handled appropriately by the caller.
+    void approveConnection(bool accept, const char* reason=0);
+
+
+    // Methods to be overridden in a derived class
+
+    // versionReceived() indicates that the version number has just been read
+    // from the client.  The version will already have been "cooked"
+    // to deal with unknown/bogus viewer protocol numbers.
+    virtual void versionReceived();
+
+    // authSuccess() is called when authentication has succeeded.
+    virtual void authSuccess();
+
+    // queryConnection() is called when authentication has succeeded, but
+    // before informing the client.  It can be overridden to query a local user
+    // to accept the incoming connection, for example.  The userName argument
+    // is the name of the user making the connection, or null (note that the
+    // storage for userName is owned by the caller).  The connection must be
+    // accepted or rejected by calling approveConnection(), either directly
+    // from queryConnection() or some time later.
+    virtual void queryConnection(const char* userName);
+
+    // clientInit() is called when the ClientInit message is received.  The
+    // derived class must call on to SConnection::clientInit().
+    virtual void clientInit(bool shared);
+
+    // setPixelFormat() is called when a SetPixelFormat message is received.
+    // The derived class must call on to SConnection::setPixelFormat().
+    virtual void setPixelFormat(const PixelFormat& pf);
+
+    // framebufferUpdateRequest() is called when a FramebufferUpdateRequest
+    // message is received.  The derived class must call on to
+    // SConnection::framebufferUpdateRequest().
+    virtual void framebufferUpdateRequest(const Rect& r, bool incremental);
+
+    // setInitialColourMap() is called when the client needs an initial
+    // SetColourMapEntries message.  In fact this only happens when the client
+    // accepts the server's default pixel format and it uses a colour map.
+    virtual void setInitialColourMap();
+
+    // setAccessRights() allows a security package to limit the access rights
+    // of a VNCSConnectionST to the server.  How the access rights are treated
+    // is up to the derived class.
+
+    typedef rdr::U16 AccessRights;
+    static const AccessRights AccessView;         // View display contents
+    static const AccessRights AccessKeyEvents;    // Send key events
+    static const AccessRights AccessPtrEvents;    // Send pointer events
+    static const AccessRights AccessCutText;      // Send/receive clipboard events
+    static const AccessRights AccessDefault;      // The default rights, INCLUDING FUTURE ONES
+    static const AccessRights AccessNoQuery;      // Connect without local user accepting
+    static const AccessRights AccessFull;         // All of the available AND FUTURE rights
+    virtual void setAccessRights(AccessRights ar) = 0;
+
+    // Other methods
+
+    // authenticated() returns true if the client has authenticated
+    // successfully.
+    bool authenticated() { return (state_ == RFBSTATE_INITIALISATION ||
+                                   state_ == RFBSTATE_NORMAL); }
+
+    // deleteReaderAndWriter() deletes the reader and writer associated with
+    // this connection.  This may be useful if you want to delete the streams
+    // before deleting the SConnection to make sure that no attempt by the
+    // SConnection is made to read or write.
+    // XXX Do we really need this at all???
+    void deleteReaderAndWriter();
+
+    // throwConnFailedException() prints a message to the log, sends a conn
+    // failed message to the client (if possible) and throws a
+    // ConnFailedException.
+    void throwConnFailedException(const char* msg);
+
+    // writeConnFailedFromScratch() sends a conn failed message to an OutStream
+    // without the need to negotiate the protocol version first.  It actually
+    // does this by assuming that the client will understand version 3.3 of the
+    // protocol.
+    static void writeConnFailedFromScratch(const char* msg,
+                                           rdr::OutStream* os);
+
+    SMsgReader* reader() { return reader_; }
+    SMsgWriter* writer() { return writer_; }
+
+    rdr::InStream* getInStream() { return is; }
+    rdr::OutStream* getOutStream() { return os; }
+
+    enum stateEnum {
+      RFBSTATE_UNINITIALISED,
+      RFBSTATE_PROTOCOL_VERSION,
+      RFBSTATE_SECURITY_TYPE,
+      RFBSTATE_SECURITY,
+      RFBSTATE_QUERYING,
+      RFBSTATE_INITIALISATION,
+      RFBSTATE_NORMAL,
+      RFBSTATE_CLOSING,
+      RFBSTATE_INVALID
+    };
+
+    stateEnum state() { return state_; }
+
+    // ssecurity() returns a pointer to this connection's SSecurity object, if
+    // any
+    const SSecurity* ssecurity() const { return security; }
+
+  protected:
+    void setState(stateEnum s) { state_ = s; }
+
+    bool readyForSetColourMapEntries;
+
+    void processVersionMsg();
+    void processSecurityTypeMsg();
+    void processSecurityMsg();
+    void processInitMsg();
+
+    int defaultMajorVersion, defaultMinorVersion;
+    rdr::InStream* is;
+    rdr::OutStream* os;
+    SMsgReader* reader_;
+    SMsgWriter* writer_;
+    SSecurity* security;
+    SSecurityFactory* securityFactory;
+    stateEnum state_;
+    bool reverseConnection;
+  };
+}
+#endif
diff --git a/common/rfb/SDesktop.h b/common/rfb/SDesktop.h
new file mode 100644
index 00000000..7b054e37
--- /dev/null
+++ b/common/rfb/SDesktop.h
@@ -0,0 +1,121 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+/////////////////////////////////////////////////////////////////////////////
+
+// SDesktop is an interface implemented by back-ends, on which callbacks are
+// made by the VNCServer as appropriate for pointer and keyboard events, etc.
+// SDesktop objects are always created before the VNCServer - the SDesktop
+// will be passed a pointer to the VNCServer in the start() call.  If a more
+// implementation-specific pointer to the VNCServer is required then this
+// can be provided to the SDesktop via an implementation-specific method.
+//
+// An SDesktop usually has an associated PixelBuffer which it tells the
+// VNCServer via the VNCServer's setPixelBuffer() method.  It can do this at
+// any time, but the PixelBuffer MUST be valid by the time the call to start()
+// returns.  The PixelBuffer may be set to null again if desired when stop() is
+// called.  Note that start() and stop() are guaranteed to be called
+// alternately; there should never be two calls to start() without an
+// intervening stop() and vice-versa.
+//
+
+#ifndef __RFB_SDESKTOP_H__
+#define __RFB_SDESKTOP_H__
+
+#include <rfb/PixelBuffer.h>
+#include <rfb/VNCServer.h>
+#include <rfb/InputHandler.h>
+#include <rfb/Exception.h>
+
+namespace rfb {
+
+  class VNCServer;
+
+  class SDesktop : public InputHandler {
+  public:
+    // start() is called by the server when the first client authenticates
+    // successfully, and can be used to begin any expensive tasks which are not
+    // needed when there are no clients.  A valid PixelBuffer must have been
+    // set via the VNCServer's setPixelBuffer() method by the time this call
+    // returns.
+
+    virtual void start(VNCServer* vs) {}
+
+    // stop() is called by the server when there are no longer any
+    // authenticated clients, and therefore the desktop can cease any
+    // expensive tasks.  No further calls to the VNCServer passed to start()
+    // can be made once stop has returned.
+
+    virtual void stop() {}
+
+    // framebufferUpdateRequest() is called to let the desktop know that at
+    // least one client has become ready for an update.  Desktops can check
+    // whether there are clients ready at any time by calling the VNCServer's
+    // clientsReadyForUpdate() method.
+
+    virtual void framebufferUpdateRequest() {}
+
+    // getFbSize() returns the current dimensions of the framebuffer.
+    // This can be called even while the SDesktop is not start()ed.
+
+    virtual Point getFbSize() = 0;
+
+    // InputHandler interface
+    // pointerEvent(), keyEvent() and clientCutText() are called in response to
+    // the relevant RFB protocol messages from clients.
+    // See InputHandler for method signatures.
+  protected:
+    virtual ~SDesktop() {}
+  };
+
+  // -=- SStaticDesktop
+  //     Trivial implementation of the SDesktop interface, which provides
+  //     dummy input handlers and event processing routine, and exports
+  //     a plain black desktop of the specified format.
+  class SStaticDesktop : public SDesktop {
+  public:
+    SStaticDesktop(const Point& size) : server(0), buffer(0) {
+      PixelFormat pf;
+      buffer = new ManagedPixelBuffer(pf, size.x, size.y);
+      if (buffer) memset(buffer->data, 0, (pf.bpp/8) * (size.x*size.y));
+    }
+    SStaticDesktop(const Point& size, const PixelFormat& pf) : buffer(0) {
+      buffer = new ManagedPixelBuffer(pf, size.x, size.y);
+      if (buffer) memset(buffer->data, 0, (pf.bpp/8) * (size.x*size.y));
+    }
+    virtual ~SStaticDesktop() {
+      if (buffer) delete buffer;
+    }
+
+    virtual void start(VNCServer* vs) {
+      server = vs;
+      server->setPixelBuffer(buffer);
+    }
+    virtual void stop() {
+      server->setPixelBuffer(0);
+      server = 0;
+    }
+
+  protected:
+    VNCServer* server;
+    ManagedPixelBuffer* buffer;
+  };
+
+};
+
+#endif // __RFB_SDESKTOP_H__
diff --git a/common/rfb/SFTMsgReader.cxx b/common/rfb/SFTMsgReader.cxx
new file mode 100644
index 00000000..22787bf0
--- /dev/null
+++ b/common/rfb/SFTMsgReader.cxx
@@ -0,0 +1,201 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- SFTMsgReader.cxx
+
+#include <rfb/SFTMsgReader.h>
+
+using namespace rfb;
+
+SFTMsgReader::SFTMsgReader(rdr::InStream *pIS)
+{
+  m_pIS = pIS;
+}
+
+SFTMsgReader::~SFTMsgReader()
+{
+}
+    
+bool 
+SFTMsgReader::readFileListRqst(unsigned int *pDirNameSize, char *pDirName, 
+                               unsigned int *pFlags)
+{
+  *pFlags = m_pIS->readU8();
+  unsigned int dirNameSize = m_pIS->readU16();
+
+  if (dirNameSize >= FT_FILENAME_SIZE) {
+    m_pIS->skip(dirNameSize);
+    return false;
+  } else {
+    m_pIS->readBytes(pDirName, dirNameSize);
+    *pDirNameSize = dirNameSize;
+    pDirName[dirNameSize] = '\0';
+    return true;
+  }
+}
+    
+bool 
+SFTMsgReader::readFileDownloadRqst(unsigned int *pFilenameSize, char *pFilename, 
+                                   unsigned int *pPosition)
+{
+  unsigned char compressedLevel = 0;
+  return readU8U16U32StringMsg(&compressedLevel, pFilenameSize, pPosition, pFilename);
+}
+
+bool 
+SFTMsgReader::readFileUploadRqst(unsigned int *pFilenameSize, char *pFilename, 
+                                 unsigned int *pPosition)
+{
+  unsigned char compressedLevel = 0;
+  return readU8U16U32StringMsg(&compressedLevel, pFilenameSize, pPosition, pFilename);
+}
+    
+char *
+SFTMsgReader::readFileUploadData(unsigned int *pDataSize, unsigned int *pModTime)
+{
+  unsigned char compressedLevel = m_pIS->readU8();
+  unsigned int realSize = m_pIS->readU16();
+  unsigned int compressedSize = m_pIS->readU16();
+
+  if ((realSize == 0) && (compressedSize == 0)) {
+    *pDataSize = 0;
+    *pModTime = m_pIS->readU32();
+    return NULL;
+  } else {
+    char *pData = new char [compressedSize];
+    m_pIS->readBytes(pData, compressedSize);
+    *pDataSize = compressedSize;
+    *pModTime = 0;
+    return pData;
+  }
+}
+    
+bool 
+SFTMsgReader::readFileCreateDirRqst(unsigned int *pDirNameSize, char *pDirName)
+{
+  return readU8U16StringMsg(pDirNameSize, pDirName);
+}
+
+bool 
+SFTMsgReader::readFileDirSizeRqst(unsigned int *pDirNameSize, char *pDirName)
+{
+  return readU8U16StringMsg(pDirNameSize, pDirName);
+}
+
+bool 
+SFTMsgReader::readFileDeleteRqst(unsigned int *pNameSize, char *pName)
+{
+  return readU8U16StringMsg(pNameSize, pName);
+}
+    
+bool 
+SFTMsgReader::readFileRenameRqst(unsigned int *pOldNameSize, 
+                                 unsigned int *pNewNameSize,
+                                 char *pOldName, char *pNewName)
+{
+  m_pIS->skip(1);
+
+  unsigned int oldNameSize = m_pIS->readU16();
+  unsigned int newNameSize = m_pIS->readU16();
+
+  if ((oldNameSize >= *pOldNameSize) || (newNameSize >= *pNewNameSize)) {
+    m_pIS->skip(oldNameSize);
+    m_pIS->skip(newNameSize);
+    return false;
+  }
+
+  if (oldNameSize != 0) {
+    m_pIS->readBytes(pOldName, oldNameSize);
+    pOldName[oldNameSize] = '\0';
+    *pOldNameSize = oldNameSize;
+  } else {
+    *pOldNameSize = 0;
+    pOldName[0] = '\0';
+  }
+
+  if (newNameSize != 0) {
+    m_pIS->readBytes(pNewName, newNameSize);
+    pNewName[newNameSize] = '\0';
+  } else {
+    *pNewNameSize = 0;
+    pNewName[0] = '\0';
+  }
+
+  return true;
+}
+
+bool
+SFTMsgReader::readFileDownloadCancel(unsigned int *pReasonSize, char *pReason)
+{
+  return readU8U16StringMsg(pReasonSize, pReason);
+}
+
+bool
+SFTMsgReader::readFileUploadFailed(unsigned int *pReasonSize, char *pReason)
+{
+  return readU8U16StringMsg(pReasonSize, pReason);
+}
+
+bool 
+SFTMsgReader::readU8U16StringMsg(unsigned int *pReasonSize, char *pReason)
+{
+  m_pIS->skip(1);
+  unsigned int reasonSize = m_pIS->readU16();
+
+  if (reasonSize >= FT_FILENAME_SIZE) {
+    m_pIS->skip(reasonSize);
+    return false;
+  } else {
+    if (reasonSize == 0) {
+      pReason[0] = '\0';
+    } else {
+      m_pIS->readBytes(pReason, reasonSize);
+      pReason[reasonSize] = '\0';
+    }
+      *pReasonSize = reasonSize;
+    return true;
+  }
+}
+
+bool 
+SFTMsgReader::readU8U16U32StringMsg(unsigned char *pU8, unsigned int *pU16, 
+                                    unsigned int *pU32, char *pString)
+{
+  *pU8 = m_pIS->readU8();
+  unsigned int strSize = m_pIS->readU16();
+  *pU32 = m_pIS->readU32();
+
+  if (strSize >= FT_FILENAME_SIZE) {
+    m_pIS->skip(strSize);
+    return false;
+  } else {
+    *pU16 = strSize;
+    if (strSize == 0) {
+      pString[0] = '\0';
+    } else {
+      m_pIS->readBytes(pString, strSize);
+      pString[strSize] = '\0';
+    }
+    return true;
+  }
+}
diff --git a/common/rfb/SFTMsgReader.h b/common/rfb/SFTMsgReader.h
new file mode 100644
index 00000000..32ac8697
--- /dev/null
+++ b/common/rfb/SFTMsgReader.h
@@ -0,0 +1,71 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- SFTMsgReader.h
+
+#ifndef __RFB_SFTMSGREADER_H__
+#define __RFB_SFTMSGREADER_H__
+
+#include <rdr/InStream.h>
+#include <rfb/fttypes.h>
+
+namespace rfb {
+  class SFTMsgReader
+  {
+  public:
+    SFTMsgReader(rdr::InStream *pIS);
+    ~SFTMsgReader();
+    
+    bool readFileListRqst(unsigned int *pDirNameSize, char *pDirName, 
+                          unsigned int *pFlags);
+    
+    
+    bool readFileDownloadRqst(unsigned int *pFilenameSize, char *pFilename, 
+                              unsigned int *pPosition);
+
+    bool readFileUploadRqst(unsigned int *pFilenameSize, char *pFilename, 
+                            unsigned int *pPosition);
+    
+    char *readFileUploadData(unsigned int *pDataSize, unsigned int *pModTime);
+
+    
+    bool readFileCreateDirRqst(unsigned int *pDirNameSize, char *pDirName);
+    bool readFileDirSizeRqst(unsigned int *pDirNameSize, char *pDirName);
+    bool readFileDeleteRqst(unsigned int *pNameSize, char *pName);
+    
+    bool readFileRenameRqst(unsigned int *pOldNameSize, unsigned int *pNewNameSize,
+                            char *pOldName, char *pNewName);
+
+    bool readFileDownloadCancel(unsigned int *pReasonSize, char *pReason);
+    bool readFileUploadFailed(unsigned int *pReasonSize, char *pReason);
+
+  private:
+    rdr::InStream *m_pIS;
+
+    bool readU8U16StringMsg(unsigned int *pReasonSize, char *pReason);
+    bool readU8U16U32StringMsg(unsigned char *pU8, unsigned int *pU16, 
+                               unsigned int *pU32, char *pString);
+  };
+}
+
+#endif // __RFB_SFTMSGREADER_H__
diff --git a/common/rfb/SFTMsgWriter.cxx b/common/rfb/SFTMsgWriter.cxx
new file mode 100644
index 00000000..fa6a82f9
--- /dev/null
+++ b/common/rfb/SFTMsgWriter.cxx
@@ -0,0 +1,152 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- SFTMsgWriter.cxx
+
+#include <rfb/SFTMsgWriter.h>
+
+using namespace rfb;
+
+SFTMsgWriter::SFTMsgWriter(rdr::OutStream *pOS)
+{
+  m_pOS = pOS;
+}
+
+SFTMsgWriter::~SFTMsgWriter()
+{
+}
+    
+bool 
+SFTMsgWriter::writeFileListData(unsigned char flags, rfb::FileInfo *pFileInfo)
+{
+  unsigned int numFiles = pFileInfo->getNumEntries();
+
+  m_pOS->writeU8(msgTypeFileListData);
+  m_pOS->writeU8(flags);
+  m_pOS->writeU16(numFiles);
+  
+  if (numFiles == 0) {
+    m_pOS->writeU16(0);
+    m_pOS->writeU16(0);
+  } else {
+    unsigned int filenamesSize = pFileInfo->getFilenamesSize() + numFiles;
+
+    m_pOS->writeU16(filenamesSize);
+    m_pOS->writeU16(filenamesSize);
+
+    char *pFilenames = new char [filenamesSize];
+    unsigned int pos = 0;
+
+    for (unsigned int i = 0; i < numFiles; i++) {
+      char *pName = pFileInfo->getNameAt(i);
+      unsigned int len = strlen(pName);
+
+      memcpy((void *)&pFilenames[pos], pName, len + 1);
+      pos += (len + 1);
+
+      if (pFileInfo->getFlagsAt(i) & FT_ATTR_DIR) {
+        m_pOS->writeU32(FT_NET_ATTR_DIR);
+      } else {
+        m_pOS->writeU32(pFileInfo->getSizeAt(i));
+      }
+      m_pOS->writeU32(pFileInfo->getDataAt(i));
+    }
+
+    m_pOS->writeBytes(pFilenames, filenamesSize);
+
+    delete [] pFilenames;
+  }
+
+  m_pOS->flush();
+
+  return true;
+}
+
+bool 
+SFTMsgWriter::writeFileDownloadData(unsigned int dataSize, void *pData)
+{
+  m_pOS->writeU8(msgTypeFileDownloadData);
+  m_pOS->writeU8(0);
+  m_pOS->writeU16(dataSize);
+  m_pOS->writeU16(dataSize);
+  m_pOS->writeBytes(pData, dataSize);
+  m_pOS->flush();
+  return true;
+}
+
+bool 
+SFTMsgWriter::writeFileDownloadData(unsigned int modTime)
+{
+  m_pOS->writeU8(msgTypeFileDownloadData);
+  m_pOS->writeU8(0);
+  m_pOS->writeU16(0);
+  m_pOS->writeU16(0);
+  m_pOS->writeU32(modTime);
+  m_pOS->flush();
+  return true;
+}
+
+bool
+SFTMsgWriter::writeFileUploadCancel(unsigned int reasonLen, char *pReason)
+{
+  m_pOS->writeU8(msgTypeFileUploadCancel);
+  return writeU8U16StringMsg(0, reasonLen, pReason);
+}
+
+bool 
+SFTMsgWriter::writeFileDownloadFailed(unsigned int reasonLen, char *pReason)
+{
+  m_pOS->writeU8(msgTypeFileDownloadFailed);
+  return writeU8U16StringMsg(0, reasonLen, pReason);
+}
+
+bool 
+SFTMsgWriter::writeFileDirSizeData(unsigned int dirSizeLow, 
+                                   unsigned short dirSizeHigh)
+{
+  m_pOS->writeU8(msgTypeFileDirSizeData);
+  m_pOS->writeU8(0);
+  m_pOS->writeU16(dirSizeHigh);
+  m_pOS->writeU32(dirSizeLow);
+  m_pOS->flush();
+  return true;
+}
+
+bool 
+SFTMsgWriter::writeFileLastRqstFailed(unsigned char lastRequest, 
+                                      unsigned short reasonLen,
+                                      char *pReason)
+{
+  m_pOS->writeU8(msgTypeFileLastRequestFailed);
+  return writeU8U16StringMsg(lastRequest, reasonLen, pReason);
+}
+
+bool
+SFTMsgWriter::writeU8U16StringMsg(unsigned char p1, unsigned short p2, char *pP3)
+{
+  m_pOS->writeU8(p1);
+  m_pOS->writeU16(p2);
+  m_pOS->writeBytes(pP3, p2);
+  m_pOS->flush();
+  return true;
+}
diff --git a/common/rfb/SFTMsgWriter.h b/common/rfb/SFTMsgWriter.h
new file mode 100644
index 00000000..f6bea9f3
--- /dev/null
+++ b/common/rfb/SFTMsgWriter.h
@@ -0,0 +1,56 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- SFTMsgWriter.h
+
+#ifndef __RFB_SFTMSGWRITER_H__
+#define __RFB_SFTMSGWRITER_H__
+
+#include <rdr/OutStream.h>
+#include <rfb/FileInfo.h>
+#include <rfb/msgTypes.h>
+
+namespace rfb {
+  class SFTMsgWriter
+  {
+  public:
+    SFTMsgWriter(rdr::OutStream *pOS);
+    ~SFTMsgWriter();
+    
+    bool writeFileListData(unsigned char flags, rfb::FileInfo *pFileInfo);
+    bool writeFileDownloadData(unsigned int dataSize, void *pData);
+    bool writeFileDownloadData(unsigned int modTime);
+    bool writeFileUploadCancel(unsigned int reasonLen, char *pReason);
+    bool writeFileDownloadFailed(unsigned int reasonLen, char *pReason);
+    bool writeFileDirSizeData(unsigned int dirSizeLow, unsigned short dirSizeHigh);
+    bool writeFileLastRqstFailed(unsigned char lastRequest, unsigned short reasonLen, 
+                                 char *pReason);
+
+  private:
+    rdr::OutStream *m_pOS;
+
+    bool writeU8U16StringMsg(unsigned char p1, unsigned short p2, char *pP3);
+  };
+}
+
+#endif // __RFB_SFTMSGWRITER_H__
diff --git a/common/rfb/SFileTransfer.cxx b/common/rfb/SFileTransfer.cxx
new file mode 100644
index 00000000..957e50b2
--- /dev/null
+++ b/common/rfb/SFileTransfer.cxx
@@ -0,0 +1,335 @@
+/* Copyright (C) 2006 TightVNC Team.  All Rights Reserved.
+ *    
+ * Developed by Dennis Syrovatsky
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- SFileTransfer.cxx
+
+#include <rfb/msgTypes.h>
+#include <rfb/SFileTransfer.h>
+
+using namespace rfb;
+
+SFileTransfer::SFileTransfer(network::Socket *sock) : 
+  m_bUploadStarted(false), m_bDownloadStarted(false),
+  m_reader(&sock->inStream()), m_writer(&sock->outStream()), m_pSocket(sock)
+{
+}
+
+SFileTransfer::~SFileTransfer()
+{
+}
+
+bool
+SFileTransfer::processMessages(int type)
+{
+  switch(type)
+  {
+    case msgTypeFileListRequest:
+      return processFileListRequest();
+    case msgTypeFileDownloadRequest:
+      return processFileDownloadRequest();
+    case msgTypeFileUploadRequest:
+      return processFileUploadRequest();
+    case msgTypeFileUploadData:
+      return processFileUploadData();
+    case msgTypeFileDownloadCancel:
+      return processFileDownloadCancel();
+    case msgTypeFileUploadFailed:
+      return processFileUploadFailed();
+    case msgTypeFileCreateDirRequest:
+      return processFileCreateDirRequest();
+    case msgTypeFileDirSizeRequest:
+      return processFileDirSizeRequest();
+    case msgTypeFileRenameRequest:
+      return processFileRenameRequest();
+    case msgTypeFileDeleteRequest:
+      return processFileDeleteRequest();
+    default:
+      return false;
+  }
+}
+
+bool 
+SFileTransfer::processFileListRequest()
+{
+  char szDirName[FT_FILENAME_SIZE] = {0};
+  unsigned int dirNameSize = FT_FILENAME_SIZE;
+  unsigned int flags = 0;
+
+  if (!m_reader.readFileListRqst(&dirNameSize, szDirName, &flags)) return false;
+
+  if (!convertPathFromNet(szDirName)) return false;
+
+  bool bDirOnly = false;
+  if (flags & 0x10) bDirOnly = true;
+
+  FileInfo fi;
+  if (!makeFileList(szDirName, &fi, bDirOnly)) {
+    flags = (flags | 0x80);  
+  }
+  return m_writer.writeFileListData((unsigned char)flags, &fi);
+}
+
+bool 
+SFileTransfer::processFileDownloadRequest()
+{
+  char szName[FT_FILENAME_SIZE] = {0};
+  unsigned int nameSize = FT_FILENAME_SIZE;
+  unsigned int position = 0;
+
+  if (!m_reader.readFileDownloadRqst(&nameSize, szName, &position)) return false;
+
+  if (!convertPathFromNet(szName)) return false;
+
+  if (m_bDownloadStarted) {
+    char reason[] = "The download is already started";
+    m_writer.writeFileLastRqstFailed(msgTypeFileDownloadRequest, strlen(reason), reason);
+    return false;
+  }
+
+  if (!m_fileReader.create(szName)) return false;
+
+  m_bDownloadStarted = true;
+
+  sendFileDownloadPortion();
+
+  return true;
+}
+
+bool
+SFileTransfer::sendFileDownloadPortion()
+{
+  char buffer[FT_MAX_SENDING_SIZE];
+  unsigned int bytesRead = 0;
+
+  if (m_fileReader.read((void *)buffer, FT_MAX_SENDING_SIZE, &bytesRead)) {
+    if (bytesRead == 0) {
+      m_writer.writeFileDownloadData(m_fileReader.getTime());
+      m_fileReader.close();
+      m_bDownloadStarted = false;
+      return true;
+    } else {
+      m_writer.writeFileDownloadData(bytesRead, buffer);
+      return initDownloadCallback();
+    }
+  } else {
+    char reason[] = "Error while reading from file";
+    m_writer.writeFileDownloadFailed(strlen(reason), reason);
+    m_fileReader.close();
+    m_bDownloadStarted = false;
+    return true;
+  }
+}
+
+bool 
+SFileTransfer::processFileUploadRequest()
+{
+  char szName[FT_FILENAME_SIZE] = {0};
+  unsigned int nameSize = FT_FILENAME_SIZE;
+  unsigned int position = 0;
+
+  if (!m_reader.readFileUploadRqst(&nameSize, szName, &position)) return false;
+
+  if (!convertPathFromNet(szName)) return false;
+
+  if (m_bUploadStarted) {
+    char reason[] = "The upload is already started";
+    m_writer.writeFileLastRqstFailed(msgTypeFileUploadRequest, strlen(reason), reason);
+    return false;
+  }
+
+  if (!m_fileWriter.create(szName)) {
+    char reason[] = "Can't create local file";
+    m_writer.writeFileLastRqstFailed(msgTypeFileUploadRequest, strlen(reason), reason);
+    return true;
+  }
+
+  m_bUploadStarted = true;
+
+  return true;
+}
+
+bool 
+SFileTransfer::processFileUploadData()
+{
+  unsigned int dataSize = 0;
+  unsigned int modTime = 0;
+
+  char *pUploadData = m_reader.readFileUploadData(&dataSize, &modTime);
+
+  if (!m_bUploadStarted) {
+      char reason[] = "Upload is impossible";
+      m_writer.writeFileUploadCancel(strlen(reason), reason);
+  } else {
+    if (pUploadData == NULL) {
+      if (modTime == 0) {
+        char reason[] = "Upload failed";
+        m_writer.writeFileUploadCancel(strlen(reason), reason);
+      } else {
+        m_fileWriter.setTime(modTime);
+      }
+      m_fileWriter.close();
+      m_bUploadStarted = false;
+    } else {
+      unsigned int dataWritten = 0;
+      m_fileWriter.write(pUploadData, dataSize, &dataWritten);
+      if (dataWritten != dataSize) {
+        char reason[] = "Upload failed";
+        m_writer.writeFileUploadCancel(strlen(reason), reason);
+        m_fileWriter.close();
+        m_bUploadStarted = false;
+      }
+    }
+  }
+  delete [] pUploadData;
+  return true;
+}
+
+bool 
+SFileTransfer::processFileDownloadCancel()
+{
+  char szReason[FT_FILENAME_SIZE] = {0};
+  unsigned int reasonSize = FT_FILENAME_SIZE;
+
+  if (!m_reader.readFileDownloadCancel(&reasonSize, szReason)) return false;
+
+  m_fileReader.close();
+  m_bDownloadStarted = false;
+  return true;
+}
+
+bool 
+SFileTransfer::processFileUploadFailed()
+{
+  char szReason[FT_FILENAME_SIZE] = {0};
+  unsigned int reasonSize = FT_FILENAME_SIZE;
+
+  if (!m_reader.readFileUploadFailed(&reasonSize, szReason)) return false;
+
+  deleteIt(m_fileWriter.getFilename());
+  m_fileWriter.close();
+  m_bUploadStarted = false;
+  return true;
+}
+
+bool 
+SFileTransfer::processFileCreateDirRequest()
+{
+  char szName[FT_FILENAME_SIZE] = {0};
+  unsigned int nameSize = FT_FILENAME_SIZE;
+
+  if (!m_reader.readFileCreateDirRqst(&nameSize, szName)) return false;
+
+  if (!convertPathFromNet(szName)) return false;
+
+  return createDir(szName);
+}
+
+bool 
+SFileTransfer::processFileDirSizeRequest()
+{
+  char szName[FT_FILENAME_SIZE] = {0};
+  unsigned int nameSize = FT_FILENAME_SIZE;
+
+  if (!m_reader.readFileDirSizeRqst(&nameSize, szName)) return false;
+
+  if (!convertPathFromNet(szName)) return false;
+
+  unsigned short highSize16 = 0;
+  unsigned int lowSize32 = 0;
+
+  if (!getDirSize(szName, &highSize16, &lowSize32)) return false;
+
+  return m_writer.writeFileDirSizeData(lowSize32, highSize16);
+}
+
+bool 
+SFileTransfer::processFileRenameRequest()
+{
+  char szOldName[FT_FILENAME_SIZE] = {0};
+  char szNewName[FT_FILENAME_SIZE] = {0};
+
+  unsigned int oldNameSize = FT_FILENAME_SIZE;
+  unsigned int newNameSize = FT_FILENAME_SIZE;
+
+  if (!m_reader.readFileRenameRqst(&oldNameSize, &newNameSize, szOldName, szNewName)) return false;
+
+  if ((!convertPathFromNet(szOldName)) || (!convertPathFromNet(szNewName))) return false;
+
+  return renameIt(szOldName, szNewName);
+}
+
+bool 
+SFileTransfer::processFileDeleteRequest()
+{
+  char szName[FT_FILENAME_SIZE] = {0};
+  unsigned int nameSize = FT_FILENAME_SIZE;
+
+  if (!m_reader.readFileDeleteRqst(&nameSize, szName)) return false;
+
+  if (!convertPathFromNet(szName)) return false;
+
+  return deleteIt(szName);
+}
+
+bool 
+SFileTransfer::convertPathFromNet(char *pszPath)
+{
+  return true;
+}
+
+bool 
+SFileTransfer::makeFileList(char *pszPath, FileInfo *pFI, bool bDirOnly)
+{
+  return false;
+}
+
+bool 
+SFileTransfer::deleteIt(char *pszPath)
+{
+  return false;
+}
+
+bool 
+SFileTransfer::renameIt(char *pszOldPath, char *pszNewPath)
+{
+  return false;
+}
+
+bool 
+SFileTransfer::createDir(char *pszPath)
+{
+  return false;
+}
+
+bool 
+SFileTransfer::getDirSize(char *pszName, unsigned short *pHighSize16, 
+                          unsigned int *pLowSize32)
+{
+  return false;
+}
+
+bool
+SFileTransfer::initDownloadCallback()
+{
+  return false;
+}
diff --git a/common/rfb/SFileTransfer.h b/common/rfb/SFileTransfer.h
new file mode 100644
index 00000000..51a49282
--- /dev/null
+++ b/common/rfb/SFileTransfer.h
@@ -0,0 +1,83 @@
+/* Copyright (C) 2006 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- SFileTransfer.h
+
+#ifndef __RFB_SFILETRANSFER_H__
+#define __RFB_SFILETRANSFER_H__
+
+#include <network/Socket.h>
+#include <rfb/SFTMsgReader.h>
+#include <rfb/SFTMsgWriter.h>
+#include <rfb/FileWriter.h>
+#include <rfb/FileReader.h>
+#include <rfb/FileInfo.h>
+#include <rfb/fttypes.h>
+
+namespace rfb {
+  class SFileTransfer
+  {
+  public:
+    SFileTransfer(network::Socket *sock);
+    virtual ~SFileTransfer();
+
+    bool processMessages(int type);
+    bool sendFileDownloadPortion();
+
+  protected:
+    bool processFileListRequest();
+    bool processFileDownloadRequest();
+    bool processFileUploadRequest();
+    bool processFileUploadData();
+    bool processFileDownloadCancel();
+    bool processFileUploadFailed();
+    bool processFileCreateDirRequest();
+    bool processFileDirSizeRequest();
+    bool processFileRenameRequest();
+    bool processFileDeleteRequest();
+
+    virtual bool initDownloadCallback();
+    virtual bool makeFileList(char *pszPath, FileInfo *pFI, bool bDirOnly);
+    virtual bool convertPathFromNet(char *pszPath);
+
+    virtual bool deleteIt(char *pszPath);
+    virtual bool renameIt(char *pszOldPath, char *pszNewPath);
+    virtual bool createDir(char *pszPath);
+
+    virtual bool getDirSize(char *pszName, unsigned short *pHighSize16, unsigned int *pLowSize32);
+
+    bool m_bUploadStarted;
+    bool m_bDownloadStarted;
+    
+  private:
+    SFTMsgReader m_reader;
+    SFTMsgWriter m_writer;
+
+    FileWriter m_fileWriter;
+    FileReader m_fileReader;
+
+    network::Socket *m_pSocket;
+  };
+}
+
+#endif // __RFB_SFILETRANSFER_H__
diff --git a/common/rfb/SFileTransferManager.cxx b/common/rfb/SFileTransferManager.cxx
new file mode 100644
index 00000000..999a079b
--- /dev/null
+++ b/common/rfb/SFileTransferManager.cxx
@@ -0,0 +1,55 @@
+/* Copyright (C) 2006 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- SFileTransferManager.cxx
+
+#include <rfb/SFileTransferManager.h>
+
+using namespace rfb;
+
+SFileTransferManager::SFileTransferManager()
+{
+
+}
+
+SFileTransferManager::~SFileTransferManager()
+{
+  destroy();
+}
+
+void
+SFileTransferManager::destroyObject(SFileTransfer *pFT)
+{
+  if (pFT == NULL) return;
+
+  m_lstFTObjects.remove(pFT);
+
+  delete pFT;
+}
+
+void
+SFileTransferManager::destroy()
+{
+  while(!m_lstFTObjects.empty())
+    delete m_lstFTObjects.front();
+}
diff --git a/common/rfb/SFileTransferManager.h b/common/rfb/SFileTransferManager.h
new file mode 100644
index 00000000..fe816444
--- /dev/null
+++ b/common/rfb/SFileTransferManager.h
@@ -0,0 +1,51 @@
+/* Copyright (C) 2006 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- SFileTransferManager.h
+
+#ifndef __RFB_SFILETRANSFERMANAGER_H__
+#define __RFB_SFILETRANSFERMANAGER_H__
+
+#include <list>
+
+#include <rfb/SFileTransfer.h>
+#include <network/Socket.h>
+
+namespace rfb {
+  class SFileTransferManager
+  {
+  public:
+    SFileTransferManager();
+    virtual ~SFileTransferManager();
+
+    virtual SFileTransfer *createObject(network::Socket *sock) = 0;
+    void destroyObject(SFileTransfer *pFT);
+
+  protected:
+    std::list<SFileTransfer*> m_lstFTObjects;
+
+    void destroy();
+  };
+}
+
+#endif // __RFB_SFILETRANSFERMANAGER_H__
diff --git a/common/rfb/SMsgHandler.cxx b/common/rfb/SMsgHandler.cxx
new file mode 100644
index 00000000..ccc97ad0
--- /dev/null
+++ b/common/rfb/SMsgHandler.cxx
@@ -0,0 +1,52 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/Exception.h>
+#include <rfb/SMsgHandler.h>
+
+using namespace rfb;
+
+SMsgHandler::SMsgHandler()
+{
+}
+
+SMsgHandler::~SMsgHandler()
+{
+}
+
+void SMsgHandler::clientInit(bool shared)
+{
+}
+
+void SMsgHandler::setPixelFormat(const PixelFormat& pf)
+{
+  cp.setPF(pf);
+}
+
+void SMsgHandler::setEncodings(int nEncodings, rdr::U32* encodings)
+{
+  cp.setEncodings(nEncodings, encodings);
+  supportsLocalCursor();
+}
+
+void SMsgHandler::framebufferUpdateRequest(const Rect& r, bool incremental)
+{
+}
+
+void SMsgHandler::supportsLocalCursor()
+{
+}
diff --git a/common/rfb/SMsgHandler.h b/common/rfb/SMsgHandler.h
new file mode 100644
index 00000000..cf3377d5
--- /dev/null
+++ b/common/rfb/SMsgHandler.h
@@ -0,0 +1,64 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// SMsgHandler - class to handle incoming messages on the server side.
+//
+
+#ifndef __RFB_SMSGHANDLER_H__
+#define __RFB_SMSGHANDLER_H__
+
+#include <rdr/types.h>
+#include <rfb/PixelFormat.h>
+#include <rfb/ConnParams.h>
+#include <rfb/InputHandler.h>
+
+namespace rdr { class InStream; }
+
+namespace rfb {
+
+  class SMsgHandler : public InputHandler {
+  public:
+    SMsgHandler();
+    virtual ~SMsgHandler();
+
+    // The following methods are called as corresponding messages are read.  A
+    // derived class should override these methods as desired.  Note that for
+    // the setPixelFormat() and setEncodings() methods, a derived class must
+    // call on to SMsgHandler's methods.
+
+    virtual void clientInit(bool shared);
+
+    virtual void setPixelFormat(const PixelFormat& pf);
+    virtual void setEncodings(int nEncodings, rdr::U32* encodings);
+    virtual void framebufferUpdateRequest(const Rect& r, bool incremental);
+
+    // InputHandler interface
+    // The InputHandler methods will be called for the corresponding messages.
+
+    // supportsLocalCursor() is called whenever the status of
+    // cp.supportsLocalCursor has changed.  At the moment this happens on a
+    // setEncodings message, but in the future this may be due to a message
+    // specially for this purpose.
+    virtual void supportsLocalCursor();
+
+    virtual bool processFTMsg(int type) = 0;
+
+    ConnParams cp;
+  };
+}
+#endif
diff --git a/common/rfb/SMsgReader.cxx b/common/rfb/SMsgReader.cxx
new file mode 100644
index 00000000..f89e0f4f
--- /dev/null
+++ b/common/rfb/SMsgReader.cxx
@@ -0,0 +1,97 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <rdr/InStream.h>
+#include <rfb/Exception.h>
+#include <rfb/util.h>
+#include <rfb/SMsgHandler.h>
+#include <rfb/SMsgReader.h>
+#include <rfb/Configuration.h>
+
+using namespace rfb;
+
+static IntParameter maxCutText("MaxCutText", "Maximum permitted length of an incoming clipboard update", 256*1024);
+
+SMsgReader::SMsgReader(SMsgHandler* handler_, rdr::InStream* is_)
+  : handler(handler_), is(is_)
+{
+}
+
+SMsgReader::~SMsgReader()
+{
+}
+
+void SMsgReader::readSetPixelFormat()
+{
+  is->skip(3);
+  PixelFormat pf;
+  pf.read(is);
+  handler->setPixelFormat(pf);
+}
+
+void SMsgReader::readSetEncodings()
+{
+  is->skip(1);
+  int nEncodings = is->readU16();
+  rdr::U32Array encodings(nEncodings);
+  for (int i = 0; i < nEncodings; i++)
+    encodings.buf[i] = is->readU32();
+  handler->setEncodings(nEncodings, encodings.buf);
+}
+
+void SMsgReader::readFramebufferUpdateRequest()
+{
+  bool inc = is->readU8();
+  int x = is->readU16();
+  int y = is->readU16();
+  int w = is->readU16();
+  int h = is->readU16();
+  handler->framebufferUpdateRequest(Rect(x, y, x+w, y+h), inc);
+}
+
+void SMsgReader::readKeyEvent()
+{
+  bool down = is->readU8();
+  is->skip(2);
+  rdr::U32 key = is->readU32();
+  handler->keyEvent(key, down);
+}
+
+void SMsgReader::readPointerEvent()
+{
+  int mask = is->readU8();
+  int x = is->readU16();
+  int y = is->readU16();
+  handler->pointerEvent(Point(x, y), mask);
+}
+
+
+void SMsgReader::readClientCutText()
+{
+  is->skip(3);
+  int len = is->readU32();
+  if (len > maxCutText) {
+    is->skip(len);
+    fprintf(stderr,"cut text too long (%d bytes) - ignoring\n",len);
+    return;
+  }
+  CharArray ca(len+1);
+  ca.buf[len] = 0;
+  is->readBytes(ca.buf, len);
+  handler->clientCutText(ca.buf, len);
+}
diff --git a/common/rfb/SMsgReader.h b/common/rfb/SMsgReader.h
new file mode 100644
index 00000000..e6e40448
--- /dev/null
+++ b/common/rfb/SMsgReader.h
@@ -0,0 +1,56 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// SMsgReader - class for reading RFB messages on the server side
+// (i.e. messages from client to server).
+//
+
+#ifndef __RFB_SMSGREADER_H__
+#define __RFB_SMSGREADER_H__
+
+namespace rdr { class InStream; }
+
+namespace rfb {
+  class SMsgHandler;
+
+  class SMsgReader {
+  public:
+    virtual ~SMsgReader();
+
+    virtual void readClientInit()=0;
+
+    // readMsg() reads a message, calling the handler as appropriate.
+    virtual void readMsg()=0;
+
+    rdr::InStream* getInStream() { return is; }
+
+  protected:
+    virtual void readSetPixelFormat();
+    virtual void readSetEncodings();
+    virtual void readFramebufferUpdateRequest();
+    virtual void readKeyEvent();
+    virtual void readPointerEvent();
+    virtual void readClientCutText();
+
+    SMsgReader(SMsgHandler* handler, rdr::InStream* is);
+
+    SMsgHandler* handler;
+    rdr::InStream* is;
+  };
+}
+#endif
diff --git a/common/rfb/SMsgReaderV3.cxx b/common/rfb/SMsgReaderV3.cxx
new file mode 100644
index 00000000..be01b5db
--- /dev/null
+++ b/common/rfb/SMsgReaderV3.cxx
@@ -0,0 +1,68 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/PixelFormat.h>
+#include <rfb/msgTypes.h>
+#include <rfb/Exception.h>
+#include <rdr/InStream.h>
+#include <rfb/SMsgReaderV3.h>
+#include <rfb/SMsgHandler.h>
+
+using namespace rfb;
+
+SMsgReaderV3::SMsgReaderV3(SMsgHandler* handler, rdr::InStream* is)
+  : SMsgReader(handler, is)
+{
+}
+
+SMsgReaderV3::~SMsgReaderV3()
+{
+}
+
+void SMsgReaderV3::readClientInit()
+{
+  bool shared = is->readU8();
+  handler->clientInit(shared);
+}
+
+void SMsgReaderV3::readMsg()
+{
+  int msgType = is->readU8();
+  switch (msgType) {
+  case msgTypeSetPixelFormat:           readSetPixelFormat(); break;
+  case msgTypeSetEncodings:             readSetEncodings(); break;
+  case msgTypeFramebufferUpdateRequest: readFramebufferUpdateRequest(); break;
+  case msgTypeKeyEvent:                 readKeyEvent(); break;
+  case msgTypePointerEvent:             readPointerEvent(); break;
+  case msgTypeClientCutText:            readClientCutText(); break;
+
+  case msgTypeFileListRequest:
+  case msgTypeFileDownloadRequest:
+  case msgTypeFileUploadRequest:
+  case msgTypeFileUploadData:
+  case msgTypeFileDownloadCancel:
+  case msgTypeFileUploadFailed:
+  case msgTypeFileCreateDirRequest:
+  case msgTypeFileDirSizeRequest:
+  case msgTypeFileRenameRequest:
+  case msgTypeFileDeleteRequest:        handler->processFTMsg(msgType); break;
+
+  default:
+    fprintf(stderr, "unknown message type %d\n", msgType);
+    throw Exception("unknown message type");
+  }
+}
diff --git a/common/rfb/SMsgReaderV3.h b/common/rfb/SMsgReaderV3.h
new file mode 100644
index 00000000..c6b7bf42
--- /dev/null
+++ b/common/rfb/SMsgReaderV3.h
@@ -0,0 +1,32 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_SMSGREADERV3_H__
+#define __RFB_SMSGREADERV3_H__
+
+#include <rfb/SMsgReader.h>
+
+namespace rfb {
+  class SMsgReaderV3 : public SMsgReader {
+  public:
+    SMsgReaderV3(SMsgHandler* handler, rdr::InStream* is);
+    virtual ~SMsgReaderV3();
+    virtual void readClientInit();
+    virtual void readMsg();
+  };
+}
+#endif
diff --git a/common/rfb/SMsgWriter.cxx b/common/rfb/SMsgWriter.cxx
new file mode 100644
index 00000000..085dfc16
--- /dev/null
+++ b/common/rfb/SMsgWriter.cxx
@@ -0,0 +1,202 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <assert.h>
+#include <rdr/OutStream.h>
+#include <rfb/msgTypes.h>
+#include <rfb/ColourMap.h>
+#include <rfb/ConnParams.h>
+#include <rfb/UpdateTracker.h>
+#include <rfb/SMsgWriter.h>
+#include <rfb/LogWriter.h>
+
+using namespace rfb;
+
+static LogWriter vlog("SMsgWriter");
+
+SMsgWriter::SMsgWriter(ConnParams* cp_, rdr::OutStream* os_)
+  : imageBufIdealSize(0), cp(cp_), os(os_), lenBeforeRect(0),
+    currentEncoding(0), updatesSent(0), rawBytesEquivalent(0),
+    imageBuf(0), imageBufSize(0)
+{
+  for (unsigned int i = 0; i <= encodingMax; i++) {
+    encoders[i] = 0;
+    bytesSent[i] = 0;
+    rectsSent[i] = 0;
+  }
+}
+
+SMsgWriter::~SMsgWriter()
+{
+  vlog.info("framebuffer updates %d",updatesSent);
+  int bytes = 0;
+  for (unsigned int i = 0; i <= encodingMax; i++) {
+    delete encoders[i];
+    if (i != encodingCopyRect)
+      bytes += bytesSent[i];
+    if (rectsSent[i])
+      vlog.info("  %s rects %d, bytes %d",
+                encodingName(i), rectsSent[i], bytesSent[i]);
+  }
+  vlog.info("  raw bytes equivalent %d, compression ratio %f",
+          rawBytesEquivalent, (double)rawBytesEquivalent / bytes);
+  delete [] imageBuf;
+}
+
+void SMsgWriter::writeSetColourMapEntries(int firstColour, int nColours,
+                                          ColourMap* cm)
+{
+  startMsg(msgTypeSetColourMapEntries);
+  os->pad(1);
+  os->writeU16(firstColour);
+  os->writeU16(nColours);
+  for (int i = firstColour; i < firstColour+nColours; i++) {
+    int r, g, b;
+    cm->lookup(i, &r, &g, &b);
+    os->writeU16(r);
+    os->writeU16(g);
+    os->writeU16(b);
+  }
+  endMsg();
+}
+
+void SMsgWriter::writeBell()
+{
+  startMsg(msgTypeBell);
+  endMsg();
+}
+
+void SMsgWriter::writeServerCutText(const char* str, int len)
+{
+  startMsg(msgTypeServerCutText);
+  os->pad(3);
+  os->writeU32(len);
+  os->writeBytes(str, len);
+  endMsg();
+}
+
+void SMsgWriter::setupCurrentEncoder()
+{
+  unsigned int encoding = cp->currentEncoding();
+
+  // FIXME: Code duplication, see writeRect().
+  if (!encoders[encoding]) {
+    encoders[encoding] = Encoder::createEncoder(encoding, this);
+    assert(encoders[encoding]);
+  }
+
+  encoders[encoding]->setCompressLevel(cp->compressLevel);
+  encoders[encoding]->setQualityLevel(cp->qualityLevel);
+}
+
+int SMsgWriter::getNumRects(const Rect &r)
+{
+  unsigned int encoding = cp->currentEncoding();
+
+  if (!encoders[encoding])
+    setupCurrentEncoder();
+
+  return encoders[encoding]->getNumRects(r);
+}
+
+// FIXME: This functions does not compute the number of rectangles correctly
+//        if the Tight encoder is used (but currently that does not matter
+//        because this function is never used).
+void SMsgWriter::writeFramebufferUpdate(const UpdateInfo& ui, ImageGetter* ig,
+                                        Region* updatedRegion)
+{
+  writeFramebufferUpdateStart(ui.numRects());
+  writeRects(ui, ig, updatedRegion);
+  writeFramebufferUpdateEnd();
+}
+
+void SMsgWriter::writeRects(const UpdateInfo& ui, ImageGetter* ig,
+                            Region* updatedRegion)
+{
+  std::vector<Rect> rects;
+  std::vector<Rect>::const_iterator i;
+  updatedRegion->copyFrom(ui.changed);
+  updatedRegion->assign_union(ui.copied);
+
+  ui.copied.get_rects(&rects, ui.copy_delta.x <= 0, ui.copy_delta.y <= 0);
+  for (i = rects.begin(); i != rects.end(); i++)
+    writeCopyRect(*i, i->tl.x - ui.copy_delta.x, i->tl.y - ui.copy_delta.y);
+
+  ui.changed.get_rects(&rects);
+  for (i = rects.begin(); i != rects.end(); i++) {
+    Rect actual;
+    if (!writeRect(*i, ig, &actual)) {
+      updatedRegion->assign_subtract(*i);
+      updatedRegion->assign_union(actual);
+    }
+  }
+}
+
+
+bool SMsgWriter::needFakeUpdate()
+{
+  return false;
+}
+
+bool SMsgWriter::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+{
+  return writeRect(r, cp->currentEncoding(), ig, actual);
+}
+
+bool SMsgWriter::writeRect(const Rect& r, unsigned int encoding,
+                           ImageGetter* ig, Rect* actual)
+{
+  if (!encoders[encoding]) {
+    encoders[encoding] = Encoder::createEncoder(encoding, this);
+    assert(encoders[encoding]);
+  }
+  return encoders[encoding]->writeRect(r, ig, actual);
+}
+
+void SMsgWriter::writeCopyRect(const Rect& r, int srcX, int srcY)
+{
+  startRect(r,encodingCopyRect);
+  os->writeU16(srcX);
+  os->writeU16(srcY);
+  endRect();
+}
+
+rdr::U8* SMsgWriter::getImageBuf(int required, int requested, int* nPixels)
+{
+  int requiredBytes = required * (cp->pf().bpp / 8);
+  int requestedBytes = requested * (cp->pf().bpp / 8);
+  int size = requestedBytes;
+  if (size > imageBufIdealSize) size = imageBufIdealSize;
+
+  if (size < requiredBytes)
+    size = requiredBytes;
+
+  if (imageBufSize < size) {
+    imageBufSize = size;
+    delete [] imageBuf;
+    imageBuf = new rdr::U8[imageBufSize];
+  }
+  if (nPixels)
+    *nPixels = imageBufSize / (cp->pf().bpp / 8);
+  return imageBuf;
+}
+
+int SMsgWriter::bpp()
+{
+  return cp->pf().bpp;
+}
diff --git a/common/rfb/SMsgWriter.h b/common/rfb/SMsgWriter.h
new file mode 100644
index 00000000..ed8ad0ef
--- /dev/null
+++ b/common/rfb/SMsgWriter.h
@@ -0,0 +1,163 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// SMsgWriter - class for writing RFB messages on the server side.
+//
+
+#ifndef __RFB_SMSGWRITER_H__
+#define __RFB_SMSGWRITER_H__
+
+#include <rdr/types.h>
+#include <rfb/encodings.h>
+#include <rfb/Encoder.h>
+
+namespace rdr { class OutStream; }
+
+namespace rfb {
+
+  class PixelFormat;
+  class ConnParams;
+  class ImageGetter;
+  class ColourMap;
+  class Region;
+  class UpdateInfo;
+
+  class WriteSetCursorCallback {
+  public:
+    virtual void writeSetCursorCallback() = 0;
+  };
+
+  class SMsgWriter {
+  public:
+    virtual ~SMsgWriter();
+
+    // writeServerInit() must only be called at the appropriate time in the
+    // protocol initialisation.
+    virtual void writeServerInit()=0;
+
+    // Methods to write normal protocol messages
+
+    // writeSetColourMapEntries() writes a setColourMapEntries message, using
+    // the given ColourMap object to lookup the RGB values of the given range
+    // of colours.
+    virtual void writeSetColourMapEntries(int firstColour, int nColours,
+                                          ColourMap* cm);
+
+    // writeBell() and writeServerCutText() do the obvious thing.
+    virtual void writeBell();
+    virtual void writeServerCutText(const char* str, int len);
+
+    // setupCurrentEncoder() should be called before each framebuffer update,
+    // prior to calling getNumRects() or writeFramebufferUpdateStart().
+    void setupCurrentEncoder();
+
+    // getNumRects() computes the number of sub-rectangles that will compose a
+    // given rectangle, for current encoder.
+    int getNumRects(const Rect &r);
+
+    // writeSetDesktopSize() on a V3 writer won't actually write immediately,
+    // but will write the relevant pseudo-rectangle as part of the next update.
+    virtual bool writeSetDesktopSize()=0;
+
+    // Like setDesktopSize, we can't just write out a setCursor message
+    // immediately on a V3 writer.  Instead of calling writeSetCursor()
+    // directly, you must call cursorChange(), and then invoke writeSetCursor()
+    // in response to the writeSetCursorCallback() callback.  For a V3 writer
+    // this will happen when the next update is sent.
+    virtual void cursorChange(WriteSetCursorCallback* cb)=0;
+    virtual void writeSetCursor(int width, int height, const Point& hotspot,
+                                void* data, void* mask)=0;
+    virtual void writeSetXCursor(int width, int height, int hotspotX,
+                                int hotspotY, void* data, void* mask)=0;
+
+    // needFakeUpdate() returns true when an immediate update is needed in
+    // order to flush out setDesktopSize or setCursor pseudo-rectangles to the
+    // client.
+    virtual bool needFakeUpdate();
+
+    // writeFramebufferUpdate() writes a framebuffer update using the given
+    // UpdateInfo and ImageGetter.  On a V3 writer this may have
+    // pseudo-rectangles for setDesktopSize and setCursor added to it, and so
+    // may invoke writeSetCursorCallback().
+    virtual void writeFramebufferUpdate(const UpdateInfo& ui, ImageGetter* ig,
+                                        Region* updatedRegion);
+
+    // writeRects() accepts an UpdateInfo (changed & copied regions) and an
+    // ImageGetter to fetch pixels from.  It then calls writeCopyRect() and
+    // writeRect() as appropriate.  writeFramebufferUpdateStart() must be used
+    // before the first writeRects() call and writeFrameBufferUpdateEnd() after
+    // the last one.  It returns the actual region sent to the client, which
+    // may be smaller than the update passed in.
+    virtual void writeRects(const UpdateInfo& update, ImageGetter* ig,
+                            Region* updatedRegion);
+
+    // To construct a framebuffer update you can call
+    // writeFramebufferUpdateStart(), followed by a number of writeCopyRect()s
+    // and writeRect()s, finishing with writeFramebufferUpdateEnd().  If you
+    // know the exact number of rectangles ahead of time you can specify it to
+    // writeFramebufferUpdateStart() which can be more efficient.
+    virtual void writeFramebufferUpdateStart(int nRects)=0;
+    virtual void writeFramebufferUpdateStart()=0;
+    virtual void writeFramebufferUpdateEnd()=0;
+
+    // writeRect() tries to write the given rectangle.  If it is unable to
+    // write the whole rectangle it returns false and sets actual to the actual
+    // rectangle which was updated.
+    virtual bool writeRect(const Rect& r, ImageGetter* ig, Rect* actual);
+    virtual bool writeRect(const Rect& r, unsigned int encoding,
+                           ImageGetter* ig, Rect* actual);
+
+    virtual void writeCopyRect(const Rect& r, int srcX, int srcY);
+
+    virtual void startRect(const Rect& r, unsigned int enc)=0;
+    virtual void endRect()=0;
+
+    ConnParams* getConnParams() { return cp; }
+    rdr::OutStream* getOutStream() { return os; }
+    rdr::U8* getImageBuf(int required, int requested=0, int* nPixels=0);
+    int bpp();
+
+    int getUpdatesSent()           { return updatesSent; }
+    int getRectsSent(int encoding) { return rectsSent[encoding]; }
+    int getBytesSent(int encoding) { return bytesSent[encoding]; }
+    int getRawBytesEquivalent()    { return rawBytesEquivalent; }
+
+    int imageBufIdealSize;
+
+  protected:
+    SMsgWriter(ConnParams* cp, rdr::OutStream* os);
+
+    virtual void startMsg(int type)=0;
+    virtual void endMsg()=0;
+
+    ConnParams* cp;
+    rdr::OutStream* os;
+
+    Encoder* encoders[encodingMax+1];
+    int lenBeforeRect;
+    unsigned int currentEncoding;
+    int updatesSent;
+    int bytesSent[encodingMax+1];
+    int rectsSent[encodingMax+1];
+    int rawBytesEquivalent;
+
+    rdr::U8* imageBuf;
+    int imageBufSize;
+  };
+}
+#endif
diff --git a/common/rfb/SMsgWriterV3.cxx b/common/rfb/SMsgWriterV3.cxx
new file mode 100644
index 00000000..a85f85ea
--- /dev/null
+++ b/common/rfb/SMsgWriterV3.cxx
@@ -0,0 +1,197 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/OutStream.h>
+#include <rdr/MemOutStream.h>
+#include <rfb/msgTypes.h>
+#include <rfb/Exception.h>
+#include <rfb/ConnParams.h>
+#include <rfb/SMsgWriterV3.h>
+
+using namespace rfb;
+
+SMsgWriterV3::SMsgWriterV3(ConnParams* cp, rdr::OutStream* os)
+  : SMsgWriter(cp, os), updateOS(0), realOS(os), nRectsInUpdate(0),
+    nRectsInHeader(0), wsccb(0),
+    needSetDesktopSize(false)
+{
+}
+
+SMsgWriterV3::~SMsgWriterV3()
+{
+  delete updateOS;
+}
+
+void SMsgWriterV3::writeServerInit()
+{
+  os->writeU16(cp->width);
+  os->writeU16(cp->height);
+  cp->pf().write(os);
+  os->writeString(cp->name());
+  endMsg();
+}
+
+void SMsgWriterV3::startMsg(int type)
+{
+  if (os != realOS)
+    throw Exception("startMsg called while writing an update?");
+
+  os->writeU8(type);
+}
+
+void SMsgWriterV3::endMsg()
+{
+  os->flush();
+}
+
+bool SMsgWriterV3::writeSetDesktopSize() {
+  if (!cp->supportsDesktopResize) return false;
+  needSetDesktopSize = true;
+  return true;
+}
+
+void SMsgWriterV3::cursorChange(WriteSetCursorCallback* cb)
+{
+  wsccb = cb;
+}
+
+void SMsgWriterV3::writeSetCursor(int width, int height, const Point& hotspot,
+                                  void* data, void* mask)
+{
+  if (!wsccb) return;
+  if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
+    throw Exception("SMsgWriterV3::writeSetCursor: nRects out of sync");
+  os->writeS16(hotspot.x);
+  os->writeS16(hotspot.y);
+  os->writeU16(width);
+  os->writeU16(height);
+  os->writeU32(pseudoEncodingCursor);
+  os->writeBytes(data, width * height * (cp->pf().bpp/8));
+  os->writeBytes(mask, (width+7)/8 * height);
+}
+
+void SMsgWriterV3::writeSetXCursor(int width, int height, int hotspotX,
+				   int hotspotY, void* data, void* mask)
+{
+  if (!wsccb) return;
+  if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
+    throw Exception("SMsgWriterV3::writeSetXCursor: nRects out of sync");
+  os->writeS16(hotspotX);
+  os->writeS16(hotspotY);
+  os->writeU16(width);
+  os->writeU16(height);
+  os->writeU32(pseudoEncodingXCursor);
+  // FIXME: We only support black and white cursors, currently. We
+  // could pass the correct color by using the pix0/pix1 values
+  // returned from getBitmap, in writeSetCursorCallback. However, we
+  // would then need to undo the conversion from rgb to Pixel that is
+  // done by FakeAllocColor. 
+  if (width * height) {
+    os->writeU8(0);
+    os->writeU8(0);
+    os->writeU8(0);
+    os->writeU8(255);
+    os->writeU8(255);
+    os->writeU8(255);
+    os->writeBytes(data, (width+7)/8 * height);
+    os->writeBytes(mask, (width+7)/8 * height);
+  }
+}
+
+void SMsgWriterV3::writeFramebufferUpdateStart(int nRects)
+{
+  startMsg(msgTypeFramebufferUpdate);
+  os->pad(1);
+  if (wsccb) nRects++;
+  if (needSetDesktopSize) nRects++;
+  os->writeU16(nRects);
+  nRectsInUpdate = 0;
+  nRectsInHeader = nRects;
+  if (wsccb) {
+    wsccb->writeSetCursorCallback();
+    wsccb = 0;
+  }
+}
+
+void SMsgWriterV3::writeFramebufferUpdateStart()
+{
+  nRectsInUpdate = nRectsInHeader = 0;
+  if (!updateOS)
+    updateOS = new rdr::MemOutStream;
+  os = updateOS;
+}
+
+void SMsgWriterV3::writeFramebufferUpdateEnd()
+{
+  if (needSetDesktopSize) {
+    if (!cp->supportsDesktopResize)
+      throw Exception("Client does not support desktop resize");
+    if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
+      throw Exception("SMsgWriterV3 setDesktopSize: nRects out of sync");
+    os->writeS16(0);
+    os->writeS16(0);
+    os->writeU16(cp->width);
+    os->writeU16(cp->height);
+    os->writeU32(pseudoEncodingDesktopSize);
+    needSetDesktopSize = false;
+  }
+
+  if (nRectsInUpdate != nRectsInHeader && nRectsInHeader)
+    throw Exception("SMsgWriterV3::writeFramebufferUpdateEnd: "
+                    "nRects out of sync");
+  if (os == updateOS) {
+    os = realOS;
+    startMsg(msgTypeFramebufferUpdate);
+    os->pad(1);
+    os->writeU16(nRectsInUpdate);
+    os->writeBytes(updateOS->data(), updateOS->length());
+    updateOS->clear();
+  }
+
+  updatesSent++;
+  endMsg();
+}
+
+bool SMsgWriterV3::needFakeUpdate()
+{
+  return wsccb || needSetDesktopSize;
+}
+
+void SMsgWriterV3::startRect(const Rect& r, unsigned int encoding)
+{
+  if (++nRectsInUpdate > nRectsInHeader && nRectsInHeader)
+    throw Exception("SMsgWriterV3::startRect: nRects out of sync");
+
+  currentEncoding = encoding;
+  lenBeforeRect = os->length();
+  if (encoding != encodingCopyRect)
+    rawBytesEquivalent += 12 + r.width() * r.height() * (bpp()/8);
+
+  os->writeS16(r.tl.x);
+  os->writeS16(r.tl.y);
+  os->writeU16(r.width());
+  os->writeU16(r.height());
+  os->writeU32(encoding);
+}
+
+void SMsgWriterV3::endRect()
+{
+  if (currentEncoding <= encodingMax) {
+    bytesSent[currentEncoding] += os->length() - lenBeforeRect;
+    rectsSent[currentEncoding]++;
+  }
+}
diff --git a/common/rfb/SMsgWriterV3.h b/common/rfb/SMsgWriterV3.h
new file mode 100644
index 00000000..501fa489
--- /dev/null
+++ b/common/rfb/SMsgWriterV3.h
@@ -0,0 +1,57 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_SMSGWRITERV3_H__
+#define __RFB_SMSGWRITERV3_H__
+
+#include <rfb/SMsgWriter.h>
+
+namespace rdr { class MemOutStream; }
+
+namespace rfb {
+  class SMsgWriterV3 : public SMsgWriter {
+  public:
+    SMsgWriterV3(ConnParams* cp, rdr::OutStream* os);
+    virtual ~SMsgWriterV3();
+
+    virtual void writeServerInit();
+    virtual void startMsg(int type);
+    virtual void endMsg();
+    virtual bool writeSetDesktopSize();
+    virtual void cursorChange(WriteSetCursorCallback* cb);
+    virtual void writeSetCursor(int width, int height, const Point& hotspot,
+                                void* data, void* mask);
+    virtual void writeSetXCursor(int width, int height, int hotspotX,
+				 int hotspotY, void* data, void* mask);
+    virtual void writeFramebufferUpdateStart(int nRects);
+    virtual void writeFramebufferUpdateStart();
+    virtual void writeFramebufferUpdateEnd();
+    virtual bool needFakeUpdate();
+    virtual void startRect(const Rect& r, unsigned int encoding);
+    virtual void endRect();
+
+  private:
+    rdr::MemOutStream* updateOS;
+    rdr::OutStream* realOS;
+    int nRectsInUpdate;
+    int nRectsInHeader;
+    WriteSetCursorCallback* wsccb;
+    bool needSetDesktopSize;
+    bool needLastRect;
+  };
+}
+#endif
diff --git a/common/rfb/SSecurity.h b/common/rfb/SSecurity.h
new file mode 100644
index 00000000..108985b3
--- /dev/null
+++ b/common/rfb/SSecurity.h
@@ -0,0 +1,84 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// SSecurity - class on the server side for handling security handshaking.  A
+// derived class for a particular security type overrides the processMsg()
+// method.
+
+// processMsg() is called first when the security type has been decided on, and
+// will keep being called whenever there is data to read from the client.  It
+// should return false when it needs more data, or true when the connection has
+// been successfully authenticated.  In the event of authentication failure an
+// AuthFailureException should be thrown - this will result in a "failed"
+// security result being sent to the client with the str() from the exception
+// being sent as the reason.  Any other type of failure should be indicated by
+// some other kind of exception which will cause the connection to be aborted.
+//
+// processMsg() must never block (or at least must never block until the client
+// has been authenticated) - this is to prevent denial of service attacks.
+// Note that the first time processMsg() is called, there is no guarantee that
+// there is any data to read from the SConnection's InStream, but subsequent
+// calls guarantee there is at least one byte which can be read without
+// blocking.
+//
+// getType() should return the secType value corresponding to the SSecurity
+// implementation.
+//
+
+#ifndef __RFB_SSECURITY_H__
+#define __RFB_SSECURITY_H__
+
+#include <rdr/types.h>
+#include <rfb/util.h>
+#include <list>
+
+namespace rfb {
+
+  class SConnection;
+
+  class SSecurity {
+  public:
+    virtual ~SSecurity() {}
+    virtual bool processMsg(SConnection* sc)=0;
+    virtual void destroy() { delete this; }
+    virtual int getType() const = 0;
+
+    // getUserName() gets the name of the user attempting authentication.  The
+    // storage is owned by the SSecurity object, so a copy must be taken if
+    // necessary.  Null may be returned to indicate that there is no user name
+    // for this security type.
+    virtual const char* getUserName() const = 0;
+  };
+
+  // SSecurityFactory creates new SSecurity instances for
+  // particular security types.
+  // The instances must be destroyed by calling destroy()
+  // on them when done.
+  // getSecTypes returns a list of the security types that are both configured
+  // and actually supported.  Which configuration is considered depends on the
+  // reverseConnection parameter.
+  class SSecurityFactory {
+  public:
+    virtual ~SSecurityFactory() {}
+    virtual SSecurity* getSSecurity(rdr::U8 secType, bool noAuth=false)=0;
+    virtual void getSecTypes(std::list<rdr::U8>* secTypes,
+                             bool reverseConnection) = 0;
+  };
+
+}
+#endif
diff --git a/common/rfb/SSecurityFactoryStandard.cxx b/common/rfb/SSecurityFactoryStandard.cxx
new file mode 100644
index 00000000..a0726986
--- /dev/null
+++ b/common/rfb/SSecurityFactoryStandard.cxx
@@ -0,0 +1,128 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// SSecurityFactoryStandard
+//
+
+#include <rfb/secTypes.h>
+#include <rfb/SSecurityNone.h>
+#include <rfb/Configuration.h>
+#include <rfb/LogWriter.h>
+#include <rfb/Exception.h>
+#include <rfb/SSecurityFactoryStandard.h>
+#include <rfb/Password.h>
+
+using namespace rfb;
+
+static LogWriter vlog("SSecurityFactoryStandard");
+
+StringParameter SSecurityFactoryStandard::sec_types
+("SecurityTypes",
+ "Specify which security scheme to use for incoming connections (None, VncAuth)",
+ "VncAuth");
+
+StringParameter SSecurityFactoryStandard::rev_sec_types
+("ReverseSecurityTypes",
+ "Specify encryption scheme to use for reverse connections (None)",
+ "None");
+
+
+StringParameter SSecurityFactoryStandard::vncAuthPasswdFile
+("PasswordFile", "Password file for VNC authentication", "");
+VncAuthPasswdParameter SSecurityFactoryStandard::vncAuthPasswd
+("Password", "Obfuscated binary encoding of the password which clients must supply to "
+ "access the server", &SSecurityFactoryStandard::vncAuthPasswdFile);
+
+
+SSecurity* SSecurityFactoryStandard::getSSecurity(rdr::U8 secType, bool reverseConnection) {
+  switch (secType) {
+  case secTypeNone: return new SSecurityNone();
+  case secTypeVncAuth:
+    return new SSecurityVncAuth(&vncAuthPasswd);
+  default:
+    throw Exception("Security type not supported");
+  }
+}
+
+void SSecurityFactoryStandard::getSecTypes(std::list<rdr::U8>* secTypes, bool reverseConnection) {
+  CharArray secTypesStr;
+  if (reverseConnection)
+    secTypesStr.buf = rev_sec_types.getData();
+  else
+    secTypesStr.buf = sec_types.getData();
+  std::list<int> configured = parseSecTypes(secTypesStr.buf);
+  std::list<int>::iterator i;
+  for (i=configured.begin(); i!=configured.end(); i++) {
+    if (isSecTypeSupported(*i))
+      secTypes->push_back(*i);
+  }
+}
+
+bool SSecurityFactoryStandard::isSecTypeSupported(rdr::U8 secType) {
+  switch (secType) {
+  case secTypeNone:
+  case secTypeVncAuth:
+    return true;
+  default:
+    return false;
+  }
+}
+
+
+VncAuthPasswdParameter::VncAuthPasswdParameter(const char* name,
+                                               const char* desc,
+                                               StringParameter* passwdFile_)
+: BinaryParameter(name, desc, 0, 0), passwdFile(passwdFile_) {
+}
+
+char* VncAuthPasswdParameter::getVncAuthPasswd() {
+  ObfuscatedPasswd obfuscated;
+  getData((void**)&obfuscated.buf, &obfuscated.length);
+
+  if (obfuscated.length == 0) {
+    if (passwdFile) {
+      CharArray fname(passwdFile->getData());
+      if (!fname.buf[0]) {
+        vlog.info("neither %s nor %s params set", getName(), passwdFile->getName());
+        return 0;
+      }
+
+      FILE* fp = fopen(fname.buf, "r");
+      if (!fp) {
+        vlog.error("opening password file '%s' failed",fname.buf);
+        return 0;
+      }
+
+      vlog.debug("reading password file");
+      obfuscated.buf = new char[128];
+      obfuscated.length = fread(obfuscated.buf, 1, 128, fp);
+      fclose(fp);
+    } else {
+      vlog.info("%s parameter not set", getName());
+    }
+  }
+
+  try {
+    PlainPasswd password(obfuscated);
+    return password.takeBuf();
+  } catch (...) {
+    return 0;
+  }
+}
+
+
diff --git a/common/rfb/SSecurityFactoryStandard.h b/common/rfb/SSecurityFactoryStandard.h
new file mode 100644
index 00000000..165881ec
--- /dev/null
+++ b/common/rfb/SSecurityFactoryStandard.h
@@ -0,0 +1,68 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// SSecurityFactoryStandard - implementation of the SSecurityFactory
+// interface.
+//
+// Server implementations must define an instance of a
+// VncAuthPasswdParameter-based class somewhere.  Any class based on
+// VncAuthPasswdParameter will automatically register itself as the
+// password parameter to be used by the Standard factory.
+//
+// Two implementations are provided here:
+//
+// VncAuthPasswdConfigParameter - reads the password from the Binary
+//                                parameter "Password".
+// VncAuthPasswdFileParameter   - reads the password from the file named
+//                                in the String parameter "PasswordFile".
+//
+// This factory supports only the "None" and "VncAuth" security types.
+//
+
+#ifndef __RFB_SSECURITYFACTORY_STANDARD_H__
+#define __RFB_SSECURITYFACTORY_STANDARD_H__
+
+#include <rfb/SSecurityVncAuth.h>
+#include <rfb/Configuration.h>
+#include <rfb/util.h>
+
+namespace rfb {
+
+  class VncAuthPasswdParameter : public VncAuthPasswdGetter, BinaryParameter {
+  public:
+    VncAuthPasswdParameter(const char* name, const char* desc, StringParameter* passwdFile_);
+    virtual char* getVncAuthPasswd();
+  protected:
+    StringParameter* passwdFile;
+  };
+
+  class SSecurityFactoryStandard : public SSecurityFactory {
+  public:
+    virtual SSecurity* getSSecurity(rdr::U8 secType, bool reverse);
+    virtual void getSecTypes(std::list<rdr::U8>* secTypes, bool reverse);
+    static StringParameter sec_types;
+    static StringParameter rev_sec_types;
+    static StringParameter vncAuthPasswdFile;
+    static VncAuthPasswdParameter vncAuthPasswd;
+  protected:
+    virtual bool isSecTypeSupported(rdr::U8 secType);
+  };
+
+}
+#endif
diff --git a/common/rfb/SSecurityNone.h b/common/rfb/SSecurityNone.h
new file mode 100644
index 00000000..5c19f290
--- /dev/null
+++ b/common/rfb/SSecurityNone.h
@@ -0,0 +1,36 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// SSecurityNone.h
+//
+
+#ifndef __SSECURITYNONE_H__
+#define __SSECURITYNONE_H__
+
+#include <rfb/SSecurity.h>
+
+namespace rfb {
+
+  class SSecurityNone : public SSecurity {
+  public:
+    virtual bool processMsg(SConnection* sc) { return true; }
+    virtual int getType() const {return secTypeNone;}
+    virtual const char* getUserName() const {return 0;}
+  };
+}
+#endif
diff --git a/common/rfb/SSecurityVncAuth.cxx b/common/rfb/SSecurityVncAuth.cxx
new file mode 100644
index 00000000..29a3b964
--- /dev/null
+++ b/common/rfb/SSecurityVncAuth.cxx
@@ -0,0 +1,87 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// SSecurityVncAuth
+//
+// XXX not thread-safe, because d3des isn't - do we need to worry about this?
+//
+
+#include <rfb/SSecurityVncAuth.h>
+#include <rdr/RandomStream.h>
+#include <rfb/SConnection.h>
+#include <rfb/Password.h>
+#include <rfb/Configuration.h>
+#include <rfb/LogWriter.h>
+#include <rfb/util.h>
+#include <rfb/Exception.h>
+#include <string.h>
+#include <stdio.h>
+extern "C" {
+#include <rfb/d3des.h>
+}
+
+
+using namespace rfb;
+
+static LogWriter vlog("SVncAuth");
+
+
+SSecurityVncAuth::SSecurityVncAuth(VncAuthPasswdGetter* pg_)
+  : sentChallenge(false), responsePos(0), pg(pg_)
+{
+}
+
+bool SSecurityVncAuth::processMsg(SConnection* sc)
+{
+  rdr::InStream* is = sc->getInStream();
+  rdr::OutStream* os = sc->getOutStream();
+
+  if (!sentChallenge) {
+    rdr::RandomStream rs;
+    rs.readBytes(challenge, vncAuthChallengeSize);
+    os->writeBytes(challenge, vncAuthChallengeSize);
+    os->flush();
+    sentChallenge = true;
+    return false;
+  }
+
+  while (responsePos < vncAuthChallengeSize && is->checkNoWait(1))
+    response[responsePos++] = is->readU8();
+
+  if (responsePos < vncAuthChallengeSize) return false;
+
+  PlainPasswd passwd(pg->getVncAuthPasswd());
+
+  if (!passwd.buf)
+    throw AuthFailureException("No password configured for VNC Auth");
+
+  // Calculate the expected response
+  rdr::U8 key[8];
+  int pwdLen = strlen(passwd.buf);
+  for (int i=0; i<8; i++)
+    key[i] = i<pwdLen ? passwd.buf[i] : 0;
+  deskey(key, EN0);
+  for (int j = 0; j < vncAuthChallengeSize; j += 8)
+    des(challenge+j, challenge+j);
+
+  // Check the actual response
+  if (memcmp(challenge, response, vncAuthChallengeSize) != 0)
+    throw AuthFailureException();
+
+  return true;
+}
diff --git a/common/rfb/SSecurityVncAuth.h b/common/rfb/SSecurityVncAuth.h
new file mode 100644
index 00000000..1d0a82de
--- /dev/null
+++ b/common/rfb/SSecurityVncAuth.h
@@ -0,0 +1,55 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+// SSecurityVncAuth - legacy VNC authentication protocol.
+// The getPasswd call can be overridden if you wish to store
+// the VncAuth password in an implementation-specific place.
+// Otherwise, the password is read from a BinaryParameter
+// called Password.
+
+#ifndef __RFB_SSECURITYVNCAUTH_H__
+#define __RFB_SSECURITYVNCAUTH_H__
+
+#include <rfb/SSecurity.h>
+#include <rfb/secTypes.h>
+#include <rdr/types.h>
+
+namespace rfb {
+
+  class VncAuthPasswdGetter {
+  public:
+    // getPasswd() returns a string or null if unsuccessful.  The
+    // SSecurityVncAuth object delete[]s the string when done.
+    virtual char* getVncAuthPasswd()=0;
+  };
+
+  class SSecurityVncAuth : public SSecurity {
+  public:
+    SSecurityVncAuth(VncAuthPasswdGetter* pg);
+    virtual bool processMsg(SConnection* sc);
+    virtual int getType() const {return secTypeVncAuth;}
+    virtual const char* getUserName() const {return 0;}
+  private:
+    enum {vncAuthChallengeSize = 16};
+    rdr::U8 challenge[vncAuthChallengeSize];
+    rdr::U8 response[vncAuthChallengeSize];
+    bool sentChallenge;
+    int responsePos;
+    VncAuthPasswdGetter* pg;
+  };
+}
+#endif
diff --git a/common/rfb/ScaledPixelBuffer.cxx b/common/rfb/ScaledPixelBuffer.cxx
new file mode 100644
index 00000000..bf4612de
--- /dev/null
+++ b/common/rfb/ScaledPixelBuffer.cxx
@@ -0,0 +1,132 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- ScaledPixelBuffer.cxx
+
+#include <rfb/ScaledPixelBuffer.h>
+
+#include <math.h>
+#include <memory.h>
+
+using namespace rdr;
+using namespace rfb;
+
+ScaledPixelBuffer::ScaledPixelBuffer(U8 **src_data_, int src_width_,
+                                     int src_height_, int scale)
+  : bpp(32), scaled_data(0), scale_ratio(1), scale(100) {
+
+  setSourceBuffer(src_data_, src_width_, src_height_);
+}
+
+ScaledPixelBuffer::ScaledPixelBuffer() 
+  : src_data(0), src_width(0), src_height(0), scale_ratio(1), scale(100),
+    bpp(32), scaled_data(0) {
+}
+
+ScaledPixelBuffer::~ScaledPixelBuffer() {
+}
+
+void ScaledPixelBuffer::setSourceBuffer(U8 **src_data_, int w, int h) {
+  src_data = src_data_;
+  src_width  = w;
+  src_height = h;
+  calculateScaledBufferSize();
+  recreateScaledBuffer();
+}
+
+void ScaledPixelBuffer::setScale(int scale_) {
+  if (scale != scale_) {
+    scale = scale_;
+    scale_ratio = double(scale) / 100;
+    calculateScaledBufferSize();
+    recreateScaledBuffer();
+  }
+}
+
+void ScaledPixelBuffer::scaleRect(const Rect& r) {
+  static U8 *src_ptr, *ptr;
+  static U8 r0, r1, r2, r3;
+  static U8 g0, g1, g2, g3;
+  static U8 b0, b1, b2, b3;
+  static double c1_sub_dx, c1_sub_dy;
+  static double dx, dy;
+  static int i, j;
+  static Rect changed_rect;
+
+  // Calculate the changed pixel rect in the scaled image
+  changed_rect = calculateScaleBoundary(r);
+
+  // Scale the source rect to the destination image buffer using
+  // bilinear interplation
+  for (int y = changed_rect.tl.y; y < changed_rect.br.y; y++) {
+    j = (int)(dy = y / scale_ratio);
+    dy -= j;
+    c1_sub_dy = 1 - dy;
+
+    for (int x = changed_rect.tl.x; x < changed_rect.br.x; x++) {
+      ptr = &scaled_data[(x + y*scaled_width) * 4];
+
+      i = (int)(dx = x / scale_ratio);
+      dx -= i;
+      c1_sub_dx = 1 - dx;
+
+      src_ptr = &(*src_data)[(i + (j*src_width))*4];
+      b0 = *src_ptr; g0 = *(src_ptr+1); r0 = *(src_ptr+2);
+      if (i+1 < src_width) {
+        b1 = *(src_ptr+4); g1 = *(src_ptr+5); r1 = *(src_ptr+6);
+      } else {
+        b1 = b0; r1 = r0; g1 = g0;
+      }
+      if (j+1 < src_height) {
+        src_ptr += src_width * 4;
+        b3 = *src_ptr; g3 = *(src_ptr+1); r3 = *(src_ptr+2);
+      } else {
+        b3 = b0; r3 = r0; g3 = g0;
+      }
+      if ((i+1 < src_width) && (j+1 < src_height)) {
+        b2 = *(src_ptr+4); g2 = *(src_ptr+5); r2 = *(src_ptr+6);
+      } else if (i+1 >= src_width) {
+        b2 = b3; r2 = r3; g2 = g3;
+      } else {
+        b2 = b1; r2 = r1; g2 = g1;
+      }
+      *ptr++ = (U8)((b0*c1_sub_dx+b1*dx)*c1_sub_dy + (b3*c1_sub_dx+b2*dx)*dy);
+      *ptr++ = (U8)((g0*c1_sub_dx+g1*dx)*c1_sub_dy + (g3*c1_sub_dx+g2*dx)*dy);
+      *ptr   = (U8)((r0*c1_sub_dx+r1*dx)*c1_sub_dy + (r3*c1_sub_dx+r2*dx)*dy);
+    }
+  }
+}
+
+Rect ScaledPixelBuffer::calculateScaleBoundary(const Rect& r) {
+  static int x_start, y_start, x_end, y_end;
+  x_start = r.tl.x == 0 ? 0 : ceil((r.tl.x-1) * scale_ratio);
+  y_start = r.tl.y == 0 ? 0 : ceil((r.tl.y-1) * scale_ratio);
+  x_end = ceil(r.br.x * scale_ratio - 1); 
+  x_end = x_end < scaled_width ? x_end + 1 : scaled_width;
+  y_end = ceil(r.br.y * scale_ratio - 1);
+  y_end = y_end < scaled_height ? y_end + 1 : scaled_height;
+  return Rect(x_start, y_start, x_end, y_end);
+}
+
+void ScaledPixelBuffer::calculateScaledBufferSize() {
+  scaled_width  = (int)ceil(src_width  * scale_ratio);
+  scaled_height = (int)ceil(src_height * scale_ratio);
+}
+
+void ScaledPixelBuffer::recreateScaledBuffer() {
+}
diff --git a/common/rfb/ScaledPixelBuffer.h b/common/rfb/ScaledPixelBuffer.h
new file mode 100644
index 00000000..3b6aa7ef
--- /dev/null
+++ b/common/rfb/ScaledPixelBuffer.h
@@ -0,0 +1,85 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- ScaledPixelBuffer.h
+//
+// The ScaledPixelBuffer class allows to scale the image data 
+// from the source buffer to destination buffer using bilinear 
+// interpolation.
+
+#include <rdr/types.h>
+#include <rfb/Rect.h>
+
+using namespace rdr;
+
+namespace rfb {
+
+  class ScaledPixelBuffer {
+  public:
+    ScaledPixelBuffer(U8 **data, int width, int height, int scale);
+    ScaledPixelBuffer();
+    virtual ~ScaledPixelBuffer();
+
+    // Get width, height, number of pixels and scale
+    int width()  const { return scaled_width; }
+    int height() const { return scaled_height; }
+    int area() const { return scaled_width * scaled_height; }
+    int getScale() const { return scale; }
+
+    // Get rectangle encompassing this buffer
+    //   Top-left of rectangle is either at (0,0), or the specified point.
+    Rect getRect() const { return Rect(0, 0, scaled_width, scaled_height); }
+    Rect getRect(const Point& pos) const {
+      return Rect(pos, pos.translate(Point(scaled_width, scaled_height)));
+    }
+
+    // Set the new source buffer and its parameters
+    void setSourceBuffer(U8 **src_data, int w, int h);
+
+    // Set the new scale, in percent
+    virtual void setScale(int scale);
+
+    // Scale rect from the source image buffer to the destination buffer
+    // using bilinear interpolation
+    virtual void scaleRect(const Rect& r);
+
+    // Calculate the scaled image rectangle which depend on the source 
+    // image rectangle.
+    inline Rect calculateScaleBoundary(const Rect& r);
+
+  protected:
+
+    // Calculate the scaled buffer size depending on the source buffer
+    // parameters (width, height, pixel format)
+    void calculateScaledBufferSize();
+
+    // Recreate the scaled pixel buffer
+    virtual void recreateScaledBuffer();
+
+    int src_width;
+    int src_height;
+    int scaled_width;
+    int scaled_height;
+    int bpp;
+    int scale;
+    double scale_ratio;
+    U8 **src_data;
+    U8 *scaled_data;
+  };
+
+};
diff --git a/common/rfb/ServerCore.cxx b/common/rfb/ServerCore.cxx
new file mode 100644
index 00000000..750daae2
--- /dev/null
+++ b/common/rfb/ServerCore.cxx
@@ -0,0 +1,94 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- ServerCore.cxx
+
+// This header will define the Server interface, from which ServerMT and
+// ServerST will be derived.
+
+#include <string.h>
+#include <rfb/util.h>
+#include <rfb/ServerCore.h>
+
+rfb::IntParameter rfb::Server::idleTimeout
+("IdleTimeout",
+ "The number of seconds after which an idle VNC connection will be dropped "
+ "(zero means no timeout)",
+ 0, 0);
+rfb::IntParameter rfb::Server::maxDisconnectionTime
+("MaxDisconnectionTime",
+ "Terminate when no client has been connected for s seconds", 
+ 0, 0);
+rfb::IntParameter rfb::Server::maxConnectionTime
+("MaxConnectionTime",
+ "Terminate when a client has been connected for s seconds", 
+ 0, 0);
+rfb::IntParameter rfb::Server::maxIdleTime
+("MaxIdleTime",
+ "Terminate after s seconds of user inactivity", 
+ 0, 0);
+rfb::IntParameter rfb::Server::clientWaitTimeMillis
+("ClientWaitTimeMillis",
+ "The number of milliseconds to wait for a client which is no longer "
+ "responding",
+ 20000, 0);
+rfb::BoolParameter rfb::Server::compareFB
+("CompareFB",
+ "Perform pixel comparison on framebuffer to reduce unnecessary updates",
+ true);
+rfb::BoolParameter rfb::Server::protocol3_3
+("Protocol3.3",
+ "Always use protocol version 3.3 for backwards compatibility with "
+ "badly-behaved clients",
+ false);
+rfb::BoolParameter rfb::Server::alwaysShared
+("AlwaysShared",
+ "Always treat incoming connections as shared, regardless of the client-"
+ "specified setting",
+ false);
+rfb::BoolParameter rfb::Server::neverShared
+("NeverShared",
+ "Never treat incoming connections as shared, regardless of the client-"
+ "specified setting",
+ false);
+rfb::BoolParameter rfb::Server::disconnectClients
+("DisconnectClients",
+ "Disconnect existing clients if an incoming connection is non-shared. "
+ "If combined with NeverShared then new connections will be refused "
+ "while there is a client active",
+ true);
+rfb::BoolParameter rfb::Server::acceptKeyEvents
+("AcceptKeyEvents",
+ "Accept key press and release events from clients.",
+ true);
+rfb::BoolParameter rfb::Server::acceptPointerEvents
+("AcceptPointerEvents",
+ "Accept pointer press and release events from clients.",
+ true);
+rfb::BoolParameter rfb::Server::acceptCutText
+("AcceptCutText",
+ "Accept clipboard updates from clients.",
+ true);
+rfb::BoolParameter rfb::Server::sendCutText
+("SendCutText",
+ "Send clipboard changes to clients.",
+ true);
+rfb::BoolParameter rfb::Server::queryConnect
+("QueryConnect",
+ "Prompt the local user to accept or reject incoming connections.",
+ false);
diff --git a/common/rfb/ServerCore.h b/common/rfb/ServerCore.h
new file mode 100644
index 00000000..68d7b74b
--- /dev/null
+++ b/common/rfb/ServerCore.h
@@ -0,0 +1,56 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- ServerCore.h
+
+// This header will define the Server interface, from which ServerMT and
+// ServerST will be derived.
+
+#ifndef __RFB_SERVER_CORE_H__
+#define __RFB_SERVER_CORE_H__
+
+#include <rfb/Configuration.h>
+#include <rfb/util.h>
+
+namespace rfb {
+
+  class Server {
+  public:
+
+    static IntParameter idleTimeout;
+    static IntParameter maxDisconnectionTime;
+    static IntParameter maxConnectionTime;
+    static IntParameter maxIdleTime;
+    static IntParameter clientWaitTimeMillis;
+    static BoolParameter compareFB;
+    static BoolParameter protocol3_3;
+    static BoolParameter alwaysShared;
+    static BoolParameter neverShared;
+    static BoolParameter disconnectClients;
+    static BoolParameter acceptKeyEvents;
+    static BoolParameter acceptPointerEvents;
+    static BoolParameter acceptCutText;
+    static BoolParameter sendCutText;
+    static BoolParameter queryConnect;
+
+  };
+
+};
+
+#endif // __RFB_SERVER_CORE_H__
+
diff --git a/common/rfb/Threading.h b/common/rfb/Threading.h
new file mode 100644
index 00000000..66b3aa0f
--- /dev/null
+++ b/common/rfb/Threading.h
@@ -0,0 +1,31 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Threading.h
+// General purpose threading interface.
+// If the current platform supports threading then __RFB_THREADING_IMPL
+// will be defined after this header has been included.
+
+#ifndef __RFB_THREADING_H__
+#define __RFB_THREADING_H__
+
+#ifdef WIN32
+#include <rfb_win32/Threading.h>
+#endif
+
+#endif // __RFB_THREADING_H__
diff --git a/common/rfb/TightDecoder.cxx b/common/rfb/TightDecoder.cxx
new file mode 100644
index 00000000..9f8c505e
--- /dev/null
+++ b/common/rfb/TightDecoder.cxx
@@ -0,0 +1,159 @@
+/* Copyright (C) 2000-2003 Constantin Kaplinsky.  All Rights Reserved.
+ * Copyright (C) 2004-2005 Cendio AB. All rights reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/CMsgReader.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/TightDecoder.h>
+#include <stdio.h> /* jpeglib.h needs FILE */
+extern "C" {
+#include <jpeglib.h>
+}
+
+using namespace rfb;
+
+#define RGB_TO_PIXEL(r,g,b)						\
+  (((PIXEL_T)(r) & myFormat.redMax) << myFormat.redShift |		\
+   ((PIXEL_T)(g) & myFormat.greenMax) << myFormat.greenShift |	        \
+   ((PIXEL_T)(b) & myFormat.blueMax) << myFormat.blueShift)
+
+#define RGB24_TO_PIXEL(r,g,b)                                       \
+   ((((PIXEL_T)(r) & 0xFF) * myFormat.redMax + 127) / 255             \
+    << myFormat.redShift |                                              \
+    (((PIXEL_T)(g) & 0xFF) * myFormat.greenMax + 127) / 255           \
+    << myFormat.greenShift |                                            \
+    (((PIXEL_T)(b) & 0xFF) * myFormat.blueMax + 127) / 255            \
+    << myFormat.blueShift)
+
+#define RGB24_TO_PIXEL32(r,g,b)						\
+  (((rdr::U32)(r) & 0xFF) << myFormat.redShift |				\
+   ((rdr::U32)(g) & 0xFF) << myFormat.greenShift |			\
+   ((rdr::U32)(b) & 0xFF) << myFormat.blueShift)
+
+#define TIGHT_MAX_WIDTH 2048
+
+static void JpegSetSrcManager(j_decompress_ptr cinfo, char *compressedData,
+			      int compressedLen);
+static bool jpegError;
+
+#define EXTRA_ARGS CMsgHandler* handler
+#define FILL_RECT(r, p) handler->fillRect(r, p)
+#define IMAGE_RECT(r, p) handler->imageRect(r, p)
+#define BPP 8
+#include <rfb/tightDecode.h>
+#undef BPP
+#define BPP 16
+#include <rfb/tightDecode.h>
+#undef BPP
+#define BPP 32
+#include <rfb/tightDecode.h>
+#undef BPP
+
+Decoder* TightDecoder::create(CMsgReader* reader)
+{
+  return new TightDecoder(reader);
+}
+
+TightDecoder::TightDecoder(CMsgReader* reader_) : reader(reader_)
+{
+}
+
+TightDecoder::~TightDecoder()
+{
+}
+
+void TightDecoder::readRect(const Rect& r, CMsgHandler* handler)
+{
+  rdr::InStream* is = reader->getInStream();
+  /* Uncompressed RGB24 JPEG data, before translated, can be up to 3
+     times larger, if VNC bpp is 8. */
+  rdr::U8* buf = reader->getImageBuf(r.area()*3);
+  switch (reader->bpp()) {
+  case 8:
+    tightDecode8 (r, is, zis, (rdr::U8*) buf, handler); break;
+  case 16:
+    tightDecode16(r, is, zis, (rdr::U16*)buf, handler); break;
+  case 32:
+    tightDecode32(r, is, zis, (rdr::U32*)buf, handler); break;
+  }
+}
+
+
+//
+// A "Source manager" for the JPEG library.
+//
+
+static struct jpeg_source_mgr jpegSrcManager;
+static JOCTET *jpegBufferPtr;
+static size_t jpegBufferLen;
+
+static void JpegInitSource(j_decompress_ptr cinfo);
+static boolean JpegFillInputBuffer(j_decompress_ptr cinfo);
+static void JpegSkipInputData(j_decompress_ptr cinfo, long num_bytes);
+static void JpegTermSource(j_decompress_ptr cinfo);
+
+static void
+JpegInitSource(j_decompress_ptr cinfo)
+{
+  jpegError = false;
+}
+
+static boolean
+JpegFillInputBuffer(j_decompress_ptr cinfo)
+{
+  jpegError = true;
+  jpegSrcManager.bytes_in_buffer = jpegBufferLen;
+  jpegSrcManager.next_input_byte = (JOCTET *)jpegBufferPtr;
+
+  return TRUE;
+}
+
+static void
+JpegSkipInputData(j_decompress_ptr cinfo, long num_bytes)
+{
+  if (num_bytes < 0 || (size_t)num_bytes > jpegSrcManager.bytes_in_buffer) {
+    jpegError = true;
+    jpegSrcManager.bytes_in_buffer = jpegBufferLen;
+    jpegSrcManager.next_input_byte = (JOCTET *)jpegBufferPtr;
+  } else {
+    jpegSrcManager.next_input_byte += (size_t) num_bytes;
+    jpegSrcManager.bytes_in_buffer -= (size_t) num_bytes;
+  }
+}
+
+static void
+JpegTermSource(j_decompress_ptr cinfo)
+{
+  /* No work necessary here. */
+}
+
+static void
+JpegSetSrcManager(j_decompress_ptr cinfo, char *compressedData, int compressedLen)
+{
+  jpegBufferPtr = (JOCTET *)compressedData;
+  jpegBufferLen = (size_t)compressedLen;
+
+  jpegSrcManager.init_source = JpegInitSource;
+  jpegSrcManager.fill_input_buffer = JpegFillInputBuffer;
+  jpegSrcManager.skip_input_data = JpegSkipInputData;
+  jpegSrcManager.resync_to_restart = jpeg_resync_to_restart;
+  jpegSrcManager.term_source = JpegTermSource;
+  jpegSrcManager.next_input_byte = jpegBufferPtr;
+  jpegSrcManager.bytes_in_buffer = jpegBufferLen;
+
+  cinfo->src = &jpegSrcManager;
+}
diff --git a/common/rfb/TightDecoder.h b/common/rfb/TightDecoder.h
new file mode 100644
index 00000000..1047b374
--- /dev/null
+++ b/common/rfb/TightDecoder.h
@@ -0,0 +1,49 @@
+/* Copyright (C) 2000-2003 Constantin Kaplinsky.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_TIGHTDECODER_H__
+#define __RFB_TIGHTDECODER_H__
+
+#include <rdr/ZlibInStream.h>
+#include <rfb/Decoder.h>
+
+namespace rfb {
+
+  class TightDecoder : public Decoder {
+  public:
+    static Decoder* create(CMsgReader* reader);
+    virtual void readRect(const Rect& r, CMsgHandler* handler);
+    virtual ~TightDecoder();
+  private:
+    TightDecoder(CMsgReader* reader);
+    CMsgReader* reader;
+    rdr::ZlibInStream zis[4];
+  };
+
+  // Compression control 
+  const unsigned int rfbTightExplicitFilter = 0x04;
+  const unsigned int rfbTightFill = 0x08;
+  const unsigned int rfbTightJpeg = 0x09;
+  const unsigned int rfbTightMaxSubencoding = 0x09;
+
+  // Filters to improve compression efficiency
+  const unsigned int rfbTightFilterCopy = 0x00;
+  const unsigned int rfbTightFilterPalette = 0x01;
+  const unsigned int rfbTightFilterGradient = 0x02;
+}
+
+#endif
diff --git a/common/rfb/TightEncoder.cxx b/common/rfb/TightEncoder.cxx
new file mode 100644
index 00000000..e89a5609
--- /dev/null
+++ b/common/rfb/TightEncoder.cxx
@@ -0,0 +1,193 @@
+/* Copyright (C) 2000-2003 Constantin Kaplinsky.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/OutStream.h>
+#include <rfb/ImageGetter.h>
+#include <rfb/encodings.h>
+#include <rfb/ConnParams.h>
+#include <rfb/SMsgWriter.h>
+#include <rfb/TightEncoder.h>
+
+using namespace rfb;
+
+// Minimum amount of data to be compressed. This value should not be
+// changed, doing so will break compatibility with existing clients.
+#define TIGHT_MIN_TO_COMPRESS 12
+
+// Adjustable parameters.
+// FIXME: Get rid of #defines
+#define TIGHT_JPEG_MIN_RECT_SIZE 1024
+#define TIGHT_DETECT_MIN_WIDTH      8
+#define TIGHT_DETECT_MIN_HEIGHT     8
+
+//
+// Compression level stuff. The following array contains various
+// encoder parameters for each of 10 compression levels (0..9).
+// Last three parameters correspond to JPEG quality levels (0..9).
+//
+// NOTE: s_conf[9].maxRectSize should be >= s_conf[i].maxRectSize,
+// where i in [0..8]. RequiredBuffSize() method depends on this.
+// FIXME: Is this comment obsolete?
+//
+
+const TIGHT_CONF TightEncoder::conf[10] = {
+  {   512,   32,   6, 0, 0, 0,   4,  5 },
+  {  2048,   64,   6, 1, 1, 1,   8, 10 },
+  {  4096,  128,   8, 3, 3, 2,  24, 15 },
+  {  8192,  256,  12, 5, 5, 2,  32, 25 },
+  { 16384,  512,  12, 6, 7, 3,  32, 37 },
+  { 32768,  512,  12, 7, 8, 4,  32, 50 },
+  { 65536, 1024,  16, 7, 8, 5,  32, 60 },
+  { 65536, 1024,  16, 8, 9, 6,  64, 70 },
+  { 65536, 2048,  24, 9, 9, 7,  64, 75 },
+  { 65536, 2048,  32, 9, 9, 9,  96, 80 }
+};
+const int TightEncoder::defaultCompressLevel = 6;
+
+// FIXME: Not good to mirror TightEncoder's members here.
+static const TIGHT_CONF* s_pconf;
+static const TIGHT_CONF* s_pjconf;
+
+//
+// Including BPP-dependent implementation of the encoder.
+//
+
+#define EXTRA_ARGS ImageGetter* ig
+#define GET_IMAGE_INTO_BUF(r,buf) ig->getImage(buf, r);
+#define BPP 8
+#include <rfb/tightEncode.h>
+#undef BPP
+#define BPP 16
+#include <rfb/tightEncode.h>
+#undef BPP
+#define BPP 32
+#include <rfb/tightEncode.h>
+#undef BPP
+
+Encoder* TightEncoder::create(SMsgWriter* writer)
+{
+  return new TightEncoder(writer);
+} 
+
+TightEncoder::TightEncoder(SMsgWriter* writer_) : writer(writer_)
+{
+  setCompressLevel(defaultCompressLevel);
+  setQualityLevel(-1);
+}
+
+TightEncoder::~TightEncoder()
+{
+}
+
+void TightEncoder::setCompressLevel(int level)
+{
+  if (level >= 0 && level <= 9) {
+    pconf = &conf[level];
+  } else {
+    pconf = &conf[defaultCompressLevel];
+  }
+}
+
+void TightEncoder::setQualityLevel(int level)
+{
+  if (level >= 0 && level <= 9) {
+    pjconf = &conf[level];
+  } else {
+    pjconf = NULL;
+  }
+}
+
+int TightEncoder::getNumRects(const Rect &r)
+{
+  const unsigned int w = r.width();
+  const unsigned int h = r.height();
+
+  // Will this rectangle split into subrects?
+  bool rectTooBig = w > pconf->maxRectWidth || w * h > pconf->maxRectSize;
+  if (!rectTooBig)
+    return 1;
+
+  // Compute max sub-rectangle size.
+  const unsigned int subrectMaxWidth =
+    (w > pconf->maxRectWidth) ? pconf->maxRectWidth : w;
+  const unsigned int subrectMaxHeight =
+    pconf->maxRectSize / subrectMaxWidth;
+
+  // Return the number of subrects.
+  return (((w - 1) / pconf->maxRectWidth + 1) *
+          ((h - 1) / subrectMaxHeight + 1));
+}
+
+bool TightEncoder::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+{
+  // Shortcuts to rectangle coordinates and dimensions.
+  const int x = r.tl.x;
+  const int y = r.tl.y;
+  const unsigned int w = r.width();
+  const unsigned int h = r.height();
+
+  // Copy members of current TightEncoder instance to static variables.
+  s_pconf = pconf;
+  s_pjconf = pjconf;
+
+  // Encode small rects as is.
+  bool rectTooBig = w > pconf->maxRectWidth || w * h > pconf->maxRectSize;
+  if (!rectTooBig) {
+    writeSubrect(r, ig);
+    return true;
+  }
+
+  // Compute max sub-rectangle size.
+  const unsigned int subrectMaxWidth =
+    (w > pconf->maxRectWidth) ? pconf->maxRectWidth : w;
+  const unsigned int subrectMaxHeight =
+    pconf->maxRectSize / subrectMaxWidth;
+
+  // Split big rects into separately encoded subrects.
+  Rect sr;
+  unsigned int dx, dy, sw, sh;
+  for (dy = 0; dy < h; dy += subrectMaxHeight) {
+    for (dx = 0; dx < w; dx += pconf->maxRectWidth) {
+      sw = (dx + pconf->maxRectWidth < w) ? pconf->maxRectWidth : w - dx;
+      sh = (dy + subrectMaxHeight < h) ? subrectMaxHeight : h - dy;
+      sr.setXYWH(x + dx, y + dy, sw, sh);
+      writeSubrect(sr, ig);
+    }
+  }
+  return true;
+}
+
+void TightEncoder::writeSubrect(const Rect& r, ImageGetter* ig)
+{
+  rdr::U8* imageBuf = writer->getImageBuf(r.area());
+  ConnParams* cp = writer->getConnParams();
+  mos.clear();
+
+  switch (writer->bpp()) {
+  case 8:
+    tightEncode8(r, &mos, zos, imageBuf, cp, ig);  break;
+  case 16:
+    tightEncode16(r, &mos, zos, imageBuf, cp, ig); break;
+  case 32:
+    tightEncode32(r, &mos, zos, imageBuf, cp, ig); break;
+  }
+
+  writer->startRect(r, encodingTight);
+  rdr::OutStream* os = writer->getOutStream();
+  os->writeBytes(mos.data(), mos.length());
+  writer->endRect();
+}
diff --git a/common/rfb/TightEncoder.h b/common/rfb/TightEncoder.h
new file mode 100644
index 00000000..9c11eaff
--- /dev/null
+++ b/common/rfb/TightEncoder.h
@@ -0,0 +1,78 @@
+/* Copyright (C) 2000-2003 Constantin Kaplinsky.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_TIGHTENCODER_H__
+#define __RFB_TIGHTENCODER_H__
+
+#include <rdr/MemOutStream.h>
+#include <rdr/ZlibOutStream.h>
+#include <rfb/Encoder.h>
+
+// FIXME: Check if specifying extern "C" is really necessary.
+#include <stdio.h>
+extern "C" {
+#include "jpeg/jpeglib.h"
+}
+
+namespace rfb {
+
+  struct TIGHT_CONF {
+    unsigned int maxRectSize, maxRectWidth;
+    unsigned int monoMinRectSize;
+    int idxZlibLevel, monoZlibLevel, rawZlibLevel;
+    int idxMaxColorsDivisor;
+    int jpegQuality;
+  };
+
+  //
+  // Compression level stuff. The following array contains various
+  // encoder parameters for each of 10 compression levels (0..9).
+  // Last three parameters correspond to JPEG quality levels (0..9).
+  //
+  // NOTE: s_conf[9].maxRectSize should be >= s_conf[i].maxRectSize,
+  // where i in [0..8]. RequiredBuffSize() method depends on this.
+  // FIXME: Is this comment obsolete?
+  //
+
+  
+  class TightEncoder : public Encoder {
+  public:
+    static Encoder* create(SMsgWriter* writer);
+    virtual void setCompressLevel(int level);
+    virtual void setQualityLevel(int level);
+    virtual int getNumRects(const Rect &r);
+    virtual bool writeRect(const Rect& r, ImageGetter* ig, Rect* actual);
+    virtual ~TightEncoder();
+
+  private:
+    TightEncoder(SMsgWriter* writer);
+    void writeSubrect(const Rect& r, ImageGetter* ig);
+
+    SMsgWriter* writer;
+    rdr::MemOutStream mos;
+    rdr::ZlibOutStream zos[4];
+
+    static const int defaultCompressLevel;
+    static const TIGHT_CONF conf[];
+
+    const TIGHT_CONF* pconf;
+    const TIGHT_CONF* pjconf;
+  };
+
+}
+
+#endif
diff --git a/common/rfb/TightPalette.cxx b/common/rfb/TightPalette.cxx
new file mode 100644
index 00000000..c4ed04e4
--- /dev/null
+++ b/common/rfb/TightPalette.cxx
@@ -0,0 +1,110 @@
+/* Copyright (C) 2000-2005 Constantin Kaplinsky.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// TightPalette class implementation.
+//
+
+#include <rfb/TightPalette.h>
+
+using namespace rfb;
+
+TightPalette::TightPalette(int maxColors)
+{
+  setMaxColors(maxColors);
+  reset();
+}
+
+void TightPalette::reset()
+{
+  m_numColors = 0;
+  memset(m_hash, 0, 256 * sizeof(TightColorList *));
+}
+
+void TightPalette::setMaxColors(int maxColors)
+{
+  m_maxColors = maxColors;
+  if (m_maxColors < 0) {
+    m_maxColors = 0;
+  } else if (m_maxColors > 254) {
+    m_maxColors = 254;
+  }
+}
+
+int TightPalette::insert(rdr::U32 rgb, int numPixels)
+{
+  TightColorList *pnode;
+  TightColorList *prev_pnode = NULL;
+  int hash_key, idx, new_idx, count;
+
+  hash_key = hashFunc(rgb);
+
+  pnode = m_hash[hash_key];
+
+  while (pnode != NULL) {
+    if (pnode->rgb == rgb) {
+      // Such palette entry already exists.
+      new_idx = idx = pnode->idx;
+      count = m_entry[idx].numPixels + numPixels;
+      if (new_idx && m_entry[new_idx-1].numPixels < count) {
+        do {
+          m_entry[new_idx] = m_entry[new_idx-1];
+          m_entry[new_idx].listNode->idx = new_idx;
+          new_idx--;
+        }
+        while (new_idx && m_entry[new_idx-1].numPixels < count);
+
+        m_entry[new_idx].listNode = pnode;
+        pnode->idx = new_idx;
+      }
+      m_entry[new_idx].numPixels = count;
+      return m_numColors;
+    }
+    prev_pnode = pnode;
+    pnode = pnode->next;
+  }
+
+  // Check if the palette is full.
+  if (m_numColors == 256 || m_numColors == m_maxColors) {
+    m_numColors = 0;
+    return 0;
+  }
+
+  // Move palette entries with lesser pixel counts.
+  for ( idx = m_numColors;
+        idx > 0 && m_entry[idx-1].numPixels < numPixels;
+        idx-- ) {
+    m_entry[idx] = m_entry[idx-1];
+    m_entry[idx].listNode->idx = idx;
+  }
+
+  // Add new palette entry into the freed slot.
+  pnode = &m_list[m_numColors];
+  if (prev_pnode != NULL) {
+    prev_pnode->next = pnode;
+  } else {
+    m_hash[hash_key] = pnode;
+  }
+  pnode->next = NULL;
+  pnode->idx = idx;
+  pnode->rgb = rgb;
+  m_entry[idx].listNode = pnode;
+  m_entry[idx].numPixels = numPixels;
+
+  return ++m_numColors;
+}
diff --git a/common/rfb/TightPalette.h b/common/rfb/TightPalette.h
new file mode 100644
index 00000000..2f6448ea
--- /dev/null
+++ b/common/rfb/TightPalette.h
@@ -0,0 +1,127 @@
+/* Copyright (C) 2000-2005 Constantin Kaplinsky.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// TightPalette class is a container for ordered color values. Colors
+// are keys in a hash where values are frequency counts. Also, there
+// is a list where colors are always sorted by these counts (more
+// frequent first).
+//
+
+#ifndef __RFB_TIGHTPALETTE_H__
+#define __RFB_TIGHTPALETTE_H__
+
+#include <string.h>
+#include <rdr/types.h>
+
+namespace rfb {
+
+  struct TightColorList {
+    TightColorList *next;
+    int idx;
+    rdr::U32 rgb;
+  };
+
+  struct TightPaletteEntry {
+    TightColorList *listNode;
+    int numPixels;
+  };
+
+  class TightPalette {
+
+  protected:
+
+    // FIXME: Bigger hash table? Better hash function?
+    inline static int hashFunc(rdr::U32 rgb) {
+      return (rgb ^ (rgb >> 13)) & 0xFF;
+    }
+
+  public:
+
+    TightPalette(int maxColors = 254);
+
+    //
+    // Re-initialize the object. This does not change maximum number
+    // of colors.
+    //
+    void reset();
+
+    //
+    // Set limit on the number of colors in the palette. Note that
+    // this value cannot exceed 254.
+    //
+    void setMaxColors(int maxColors);
+
+    //
+    // Insert new color into the palette, or increment its counter if
+    // the color is already there. Returns new number of colors, or
+    // zero if the palette is full. If the palette becomes full, it
+    // reports zero colors and cannot be used any more without calling
+    // reset().
+    //
+    int insert(rdr::U32 rgb, int numPixels);
+
+    //
+    // Return number of colors in the palette.
+    //
+    inline int getNumColors() const {
+      return m_numColors;
+    }
+
+    //
+    // Return the color specified by its index in the palette.
+    //
+    inline rdr::U32 getEntry(int i) const {
+      return (i < m_numColors) ? m_entry[i].listNode->rgb : (rdr::U32)-1;
+    }
+
+    //
+    // Return the pixel counter of the color specified by its index.
+    //
+    inline int getCount(int i) const {
+      return (i < m_numColors) ? m_entry[i].numPixels : 0;
+    }
+
+    //
+    // Return the index of a specified color.
+    //
+    inline rdr::U8 getIndex(rdr::U32 rgb) const {
+      TightColorList *pnode = m_hash[hashFunc(rgb)];
+      while (pnode != NULL) {
+        if (pnode->rgb == rgb) {
+          return (rdr::U8)pnode->idx;
+        }
+        pnode = pnode->next;
+      }
+      return 0xFF;              // no such color
+    }
+
+  protected:
+
+    int m_maxColors;
+    int m_numColors;
+
+    TightPaletteEntry m_entry[256];
+    TightColorList *m_hash[256];
+    TightColorList m_list[256];
+
+  };
+
+} // namespace rfb
+
+#endif // __RFB_TIGHTPALETTE_H__
diff --git a/common/rfb/Timer.cxx b/common/rfb/Timer.cxx
new file mode 100644
index 00000000..66fd2b12
--- /dev/null
+++ b/common/rfb/Timer.cxx
@@ -0,0 +1,179 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Timer.cxx
+
+#include <stdio.h>
+#ifdef WIN32
+#include <windows.h>
+#ifndef _WIN32_WCE
+#include <sys/timeb.h>
+#endif
+#endif
+#include <rfb/Timer.h>
+#include <rfb/util.h>
+#include <rfb/LogWriter.h>
+
+// XXX Lynx/OS 2.3: proto for gettimeofday()
+#ifdef Lynx
+#include <sys/proto.h>
+#endif
+
+using namespace rfb;
+
+#ifndef __NO_DEFINE_VLOG__
+static LogWriter vlog("Timer");
+#endif
+
+
+// Win32 does not provide gettimeofday, so we emulate it to simplify the
+// Timer code.
+
+#ifdef _WIN32
+static void gettimeofday(struct timeval* tv, void*)
+{
+  LARGE_INTEGER counts, countsPerSec;
+  static double usecPerCount = 0.0;
+
+  if (QueryPerformanceCounter(&counts)) {
+    if (usecPerCount == 0.0) {
+      QueryPerformanceFrequency(&countsPerSec);
+      usecPerCount = 1000000.0 / countsPerSec.QuadPart;
+    }
+
+    LONGLONG usecs = (LONGLONG)(counts.QuadPart * usecPerCount);
+    tv->tv_usec = (long)(usecs % 1000000);
+    tv->tv_sec = (long)(usecs / 1000000);
+
+  } else {
+#ifndef _WIN32_WCE
+    struct timeb tb;
+    ftime(&tb);
+    tv->tv_sec = tb.time;
+    tv->tv_usec = tb.millitm * 1000;
+#else
+    throw SystemException("QueryPerformanceCounter", GetLastError());
+#endif
+  }
+}
+#endif
+
+
+// Millisecond timeout processing helper functions
+
+inline static timeval addMillis(timeval inTime, int millis) {
+  int secs = millis / 1000;
+  millis = millis % 1000;
+  inTime.tv_sec += secs;
+  inTime.tv_usec += millis * 1000;
+  if (inTime.tv_usec >= 1000000) {
+    inTime.tv_sec++;
+    inTime.tv_usec -= 1000000;
+  }
+  return inTime;
+}
+
+inline static int diffTimeMillis(timeval later, timeval earlier) {
+  return ((later.tv_sec - earlier.tv_sec) * 1000) + ((later.tv_usec - earlier.tv_usec) / 1000);
+}
+
+std::list<Timer*> Timer::pending;
+
+int Timer::checkTimeouts() {
+  if (pending.empty())
+    return 0;
+  timeval now;
+  gettimeofday(&now, 0);
+  while (pending.front()->isBefore(now)) {
+    Timer* timer = pending.front();
+    pending.pop_front();
+    vlog.debug("handleTimeout(%p)", timer);
+    if (timer->cb->handleTimeout(timer)) {
+      timer->dueTime = addMillis(timer->dueTime, timer->timeoutMs);
+      if (timer->isBefore(now)) {
+        // Time has jumped forwards!
+	      vlog.info("time has moved forwards!");
+        timer->dueTime = addMillis(now, timer->timeoutMs);
+      }
+      insertTimer(timer);
+    } else if (pending.empty()) {
+      return 0;
+    }
+  }
+  return getNextTimeout();
+}
+
+int Timer::getNextTimeout() {
+  timeval now;
+  gettimeofday(&now, 0);
+  int toWait = __rfbmax(1, diffTimeMillis(pending.front()->dueTime, now));
+  if (toWait > pending.front()->timeoutMs) {
+    if (toWait - pending.front()->timeoutMs < 1000) {
+      vlog.info("gettimeofday is broken...");
+      return toWait;
+    }
+    // Time has jumped backwards!
+    vlog.info("time has moved backwards!");
+    pending.front()->dueTime = now;
+    toWait = 1;
+  }
+  return toWait;
+}
+
+void Timer::insertTimer(Timer* t) {
+  std::list<Timer*>::iterator i;
+  for (i=pending.begin(); i!=pending.end(); i++) {
+    if (t->isBefore((*i)->dueTime)) {
+      pending.insert(i, t);
+      return;
+    }
+  }
+  pending.push_back(t);
+}
+
+void Timer::start(int timeoutMs_) {
+  timeval now;
+  gettimeofday(&now, 0);
+  stop();
+  timeoutMs = timeoutMs_;
+  dueTime = addMillis(now, timeoutMs);
+  insertTimer(this);
+}
+
+void Timer::stop() {
+  pending.remove(this);
+}
+
+bool Timer::isStarted() {
+  std::list<Timer*>::iterator i;
+  for (i=pending.begin(); i!=pending.end(); i++) {
+    if (*i == this)
+      return true;
+  }
+  return false;
+}
+
+int Timer::getTimeoutMs() {
+  return timeoutMs;
+}
+
+bool Timer::isBefore(timeval other) {
+  return (dueTime.tv_sec < other.tv_sec) ||
+    ((dueTime.tv_sec == other.tv_sec) &&
+     (dueTime.tv_usec < other.tv_usec));
+}
diff --git a/common/rfb/Timer.h b/common/rfb/Timer.h
new file mode 100644
index 00000000..e295b826
--- /dev/null
+++ b/common/rfb/Timer.h
@@ -0,0 +1,102 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RFB_TIMER_H__
+#define __RFB_TIMER_H__
+
+#include <list>
+#ifdef WIN32
+#include <winsock2.h>
+#else
+#include <sys/time.h>
+#endif
+
+namespace rfb {
+
+  /* Timer
+
+     Cross-platform timeout handling.  The caller creates instances of Timer and passes a
+     Callback implementation to each.  The Callback will then be called with a pointer to
+     the Timer instance that timed-out when the timeout occurs.
+
+     The static methods of Timer are used by the main loop of the application both to
+     dispatch elapsed Timer callbacks and to determine how long to wait in select() for
+     the next timeout to occur.
+
+  */
+
+  struct Timer {
+
+    struct Callback {
+      // handleTimeout
+      //   Passed a pointer to the Timer that has timed out.  If the handler returns true
+      //   then the Timer is reset and left running, causing another timeout after the
+      //   appropriate interval.
+      //   If the handler returns false then the Timer is cancelled.
+      virtual bool handleTimeout(Timer* t) = 0;
+    };
+
+    // checkTimeouts()
+    //   Dispatches any elapsed Timers, and returns the number of milliseconds until the
+    //   next Timer will timeout.
+    static int checkTimeouts();
+
+    // getNextTimeout()
+    //   Returns the number of milliseconds until the next timeout, without dispatching
+    //   any elapsed Timers.
+    static int getNextTimeout();
+
+    // Create a Timer with the specified callback handler
+    Timer(Callback* cb_) {cb = cb_;}
+    ~Timer() {stop();}
+
+    // startTimer
+    //   Starts the timer, causing a timeout after the specified number of milliseconds.
+    //   If the timer is already active then it will be implicitly cancelled and re-started.
+    void start(int timeoutMs_);
+
+    // stopTimer
+    //   Cancels the timer.
+    void stop();
+
+    // isStarted
+    //   Determines whether the timer is started.
+    bool isStarted();
+
+    // getTimeoutMs
+    //   Determines the previously used timeout value, if any.
+    //   Usually used with isStarted() to get the _current_ timeout.
+    int getTimeoutMs();
+
+    // isBefore
+    //   Determine whether the Timer will timeout before the specified time.
+    bool isBefore(timeval other);
+
+  protected:
+    timeval dueTime;
+    int timeoutMs;
+    Callback* cb;
+
+    static void insertTimer(Timer* t);
+    // The list of currently active Timers, ordered by time left until timeout.
+    static std::list<Timer*> pending;
+  };
+
+};
+
+#endif
diff --git a/common/rfb/TransImageGetter.cxx b/common/rfb/TransImageGetter.cxx
new file mode 100644
index 00000000..82c291b6
--- /dev/null
+++ b/common/rfb/TransImageGetter.cxx
@@ -0,0 +1,278 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <rfb/PixelFormat.h>
+#include <rfb/Exception.h>
+#include <rfb/ConnParams.h>
+#include <rfb/SMsgWriter.h>
+#include <rfb/ColourMap.h>
+#include <rfb/TrueColourMap.h>
+#include <rfb/PixelBuffer.h>
+#include <rfb/ColourCube.h>
+#include <rfb/TransImageGetter.h>
+
+using namespace rfb;
+
+const PixelFormat bgr233PF(8, 8, false, true, 7, 7, 3, 0, 3, 6);
+
+static void noTransFn(void* table_,
+                      const PixelFormat& inPF, void* inPtr, int inStride,
+                      const PixelFormat& outPF, void* outPtr, int outStride,
+                      int width, int height)
+{
+  rdr::U8* ip = (rdr::U8*)inPtr;
+  rdr::U8* op = (rdr::U8*)outPtr;
+  int inStrideBytes = inStride * (inPF.bpp/8);
+  int outStrideBytes = outStride * (outPF.bpp/8);
+  int widthBytes = width * (outPF.bpp/8);
+
+  while (height > 0) {
+    memcpy(op, ip, widthBytes);
+    ip += inStrideBytes;
+    op += outStrideBytes;
+    height--;
+  }
+}
+
+#define BPPOUT 8
+#include "transInitTempl.h"
+#define BPPIN 8
+#include "transTempl.h"
+#undef BPPIN
+#define BPPIN 16
+#include "transTempl.h"
+#undef BPPIN
+#define BPPIN 32
+#include "transTempl.h"
+#undef BPPIN
+#undef BPPOUT
+
+#define BPPOUT 16
+#include "transInitTempl.h"
+#define BPPIN 8
+#include "transTempl.h"
+#undef BPPIN
+#define BPPIN 16
+#include "transTempl.h"
+#undef BPPIN
+#define BPPIN 32
+#include "transTempl.h"
+#undef BPPIN
+#undef BPPOUT
+
+#define BPPOUT 32
+#include "transInitTempl.h"
+#define BPPIN 8
+#include "transTempl.h"
+#undef BPPIN
+#define BPPIN 16
+#include "transTempl.h"
+#undef BPPIN
+#define BPPIN 32
+#include "transTempl.h"
+#undef BPPIN
+#undef BPPOUT
+
+
+// Translation functions.  Note that transSimple* is only used for 8/16bpp and
+// transRGB* is used for 16/32bpp
+
+static transFnType transSimpleFns[][3] = {
+  { transSimple8to8,  transSimple8to16,  transSimple8to32 },
+  { transSimple16to8, transSimple16to16, transSimple16to32 },
+};
+static transFnType transRGBFns[][3] = {
+  { transRGB16to8, transRGB16to16, transRGB16to32 },
+  { transRGB32to8, transRGB32to16, transRGB32to32 }
+};
+static transFnType transRGBCubeFns[][3] = {
+  { transRGBCube16to8, transRGBCube16to16, transRGBCube16to32 },
+  { transRGBCube32to8, transRGBCube32to16, transRGBCube32to32 }
+};
+
+// Table initialisation functions.
+
+typedef void (*initCMtoTCFnType)(rdr::U8** tablep, const PixelFormat& inPF,
+                                 ColourMap* cm, const PixelFormat& outPF);
+typedef void (*initTCtoTCFnType)(rdr::U8** tablep, const PixelFormat& inPF,
+                                 const PixelFormat& outPF);
+typedef void (*initCMtoCubeFnType)(rdr::U8** tablep, const PixelFormat& inPF,
+                                   ColourMap* cm, ColourCube* cube);
+typedef void (*initTCtoCubeFnType)(rdr::U8** tablep, const PixelFormat& inPF,
+                                   ColourCube* cube);
+
+
+static initCMtoTCFnType initSimpleCMtoTCFns[] = {
+    initSimpleCMtoTC8, initSimpleCMtoTC16, initSimpleCMtoTC32
+};
+
+static initTCtoTCFnType initSimpleTCtoTCFns[] = {
+    initSimpleTCtoTC8, initSimpleTCtoTC16, initSimpleTCtoTC32
+};
+
+static initCMtoCubeFnType initSimpleCMtoCubeFns[] = {
+    initSimpleCMtoCube8, initSimpleCMtoCube16, initSimpleCMtoCube32
+};
+
+static initTCtoCubeFnType initSimpleTCtoCubeFns[] = {
+    initSimpleTCtoCube8, initSimpleTCtoCube16, initSimpleTCtoCube32
+};
+
+static initTCtoTCFnType initRGBTCtoTCFns[] = {
+    initRGBTCtoTC8, initRGBTCtoTC16, initRGBTCtoTC32
+};
+
+static initTCtoCubeFnType initRGBTCtoCubeFns[] = {
+    initRGBTCtoCube8, initRGBTCtoCube16, initRGBTCtoCube32
+};
+
+
+TransImageGetter::TransImageGetter(bool econ)
+  : economic(econ), pb(0), table(0), transFn(0), cube(0)
+{
+}
+
+TransImageGetter::~TransImageGetter()
+{
+  delete [] table;
+}
+
+void TransImageGetter::init(PixelBuffer* pb_, const PixelFormat& out,
+                            SMsgWriter* writer, ColourCube* cube_)
+{
+  pb = pb_;
+  outPF = out;
+  transFn = 0;
+  cube = cube_;
+  const PixelFormat& inPF = pb->getPF();
+
+  if ((inPF.bpp != 8) && (inPF.bpp != 16) && (inPF.bpp != 32))
+    throw Exception("TransImageGetter: bpp in not 8, 16 or 32");
+
+  if ((outPF.bpp != 8) && (outPF.bpp != 16) && (outPF.bpp != 32))
+    throw Exception("TransImageGetter: bpp out not 8, 16 or 32");
+
+  if (!outPF.trueColour) {
+    if (outPF.bpp != 8)
+      throw Exception("TransImageGetter: outPF has color map but not 8bpp");
+
+    if (!inPF.trueColour) {
+      if (inPF.bpp != 8)
+        throw Exception("TransImageGetter: inPF has colorMap but not 8bpp");
+
+      // CM to CM/Cube
+
+      if (cube) {
+        transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16];
+        (*initSimpleCMtoCubeFns[outPF.bpp/16]) (&table, inPF,
+                                                pb->getColourMap(), cube);
+      } else {
+        transFn = noTransFn;
+        setColourMapEntries(0, 256, writer);
+      }
+      return;
+    }
+
+    // TC to CM/Cube
+
+    ColourCube defaultCube(6,6,6);
+    if (!cube) cube = &defaultCube;
+
+    if ((inPF.bpp > 16) || (economic && (inPF.bpp == 16))) {
+      transFn = transRGBCubeFns[inPF.bpp/32][outPF.bpp/16];
+      (*initRGBTCtoCubeFns[outPF.bpp/16]) (&table, inPF, cube);
+    } else {
+      transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16];
+      (*initSimpleTCtoCubeFns[outPF.bpp/16]) (&table, inPF, cube);
+    }
+
+    if (cube != &defaultCube)
+      return;
+
+    if (writer) writer->writeSetColourMapEntries(0, 216, cube);
+    cube = 0;
+    return;
+  }
+
+  if (inPF.equal(outPF)) {
+    transFn = noTransFn;
+    return;
+  }
+
+  if (!inPF.trueColour) {
+
+    // CM to TC
+
+    if (inPF.bpp != 8)
+      throw Exception("TransImageGetter: inPF has colorMap but not 8bpp");
+    transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16];
+    (*initSimpleCMtoTCFns[outPF.bpp/16]) (&table, inPF, pb->getColourMap(),
+                                          outPF);
+    return;
+  }
+
+  // TC to TC
+
+  if ((inPF.bpp > 16) || (economic && (inPF.bpp == 16))) {
+    transFn = transRGBFns[inPF.bpp/32][outPF.bpp/16];
+    (*initRGBTCtoTCFns[outPF.bpp/16]) (&table, inPF, outPF);
+  } else {
+    transFn = transSimpleFns[inPF.bpp/16][outPF.bpp/16];
+    (*initSimpleTCtoTCFns[outPF.bpp/16]) (&table, inPF, outPF);
+  }
+}
+
+void TransImageGetter::setColourMapEntries(int firstCol, int nCols,
+                                           SMsgWriter* writer)
+{
+  if (nCols == 0)
+    nCols = (1 << pb->getPF().depth) - firstCol;
+  if (pb->getPF().trueColour) return; // shouldn't be called in this case
+
+  if (outPF.trueColour) {
+    (*initSimpleCMtoTCFns[outPF.bpp/16]) (&table, pb->getPF(),
+                                          pb->getColourMap(), outPF);
+  } else if (cube) {
+    (*initSimpleCMtoCubeFns[outPF.bpp/16]) (&table, pb->getPF(),
+                                            pb->getColourMap(), cube);
+  } else if (writer && pb->getColourMap()) {
+    writer->writeSetColourMapEntries(firstCol, nCols, pb->getColourMap());
+  }
+}
+
+void TransImageGetter::getImage(void* outPtr, const Rect& r, int outStride)
+{
+  if (!transFn)
+    throw Exception("TransImageGetter: not initialised yet");
+
+  int inStride;
+  const rdr::U8* inPtr = pb->getPixelsR(r.translate(offset.negate()), &inStride);
+
+  if (!outStride) outStride = r.width();
+
+  (*transFn)(table, pb->getPF(), (void*)inPtr, inStride,
+             outPF, outPtr, outStride, r.width(), r.height());
+}
+
+void TransImageGetter::translatePixels(void* inPtr, void* outPtr,
+                                       int nPixels) const
+{
+  (*transFn)(table, pb->getPF(), inPtr, nPixels,
+             outPF, outPtr, nPixels, nPixels, 1);
+}
diff --git a/common/rfb/TransImageGetter.h b/common/rfb/TransImageGetter.h
new file mode 100644
index 00000000..5328e6d0
--- /dev/null
+++ b/common/rfb/TransImageGetter.h
@@ -0,0 +1,104 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// TransImageGetter - class to perform translation between pixel formats,
+// implementing the ImageGetter interface.
+//
+
+#ifndef __RFB_TRANSIMAGEGETTER_H__
+#define __RFB_TRANSIMAGEGETTER_H__
+
+#include <rfb/Rect.h>
+#include <rfb/PixelFormat.h>
+#include <rfb/ImageGetter.h>
+
+namespace rfb {
+  typedef void (*transFnType)(void* table_,
+                              const PixelFormat& inPF, void* inPtr,
+                              int inStride,
+                              const PixelFormat& outPF, void* outPtr,
+                              int outStride, int width, int height);
+
+  class SMsgWriter;
+  class ColourMap;
+  class PixelBuffer;
+  class ColourCube;
+
+  class TransImageGetter : public ImageGetter {
+  public:
+
+    TransImageGetter(bool econ=false);
+    virtual ~TransImageGetter();
+
+    // init() is called to initialise the translation tables.  The PixelBuffer
+    // argument gives the source data and format details, outPF gives the
+    // client's pixel format.  If the client has a colour map, then the writer
+    // argument is used to send a SetColourMapEntries message to the client.
+
+    void init(PixelBuffer* pb, const PixelFormat& outPF, SMsgWriter* writer=0,
+              ColourCube* cube=0);
+
+    // setColourMapEntries() is called when the PixelBuffer has a colour map
+    // which has changed.  firstColour and nColours specify which part of the
+    // colour map has changed.  If nColours is 0, this means the rest of the
+    // colour map.  The PixelBuffer previously passed to init() must have a
+    // valid ColourMap object.  If the client also has a colour map, then the
+    // writer argument is used to send a SetColourMapEntries message to the
+    // client.  If the client is true colour then instead we update the
+    // internal translation table - in this case the caller should also make
+    // sure that the client receives an update of the relevant parts of the
+    // framebuffer (the simplest thing to do is just update the whole
+    // framebuffer, though it is possible to be smarter than this).
+
+    void setColourMapEntries(int firstColour, int nColours,
+                             SMsgWriter* writer=0);
+
+    // getImage() gets the given rectangle of data from the PixelBuffer,
+    // translates it into the client's pixel format and puts it in the buffer
+    // pointed to by the outPtr argument.  The optional outStride argument can
+    // be used where padding is required between the output scanlines (the
+    // padding will be outStride-r.width() pixels).
+    void getImage(void* outPtr, const Rect& r, int outStride=0);
+
+    // translatePixels() translates the given number of pixels from inPtr,
+    // putting it into the buffer pointed to by outPtr.  The pixels at inPtr
+    // should be in the same format as the PixelBuffer, and the translated
+    // pixels will be in the format previously given by the outPF argument to
+    // init().  Note that this call does not use the PixelBuffer's pixel data.
+    void translatePixels(void* inPtr, void* outPtr, int nPixels) const;
+
+    // setPixelBuffer() changes the pixel buffer to be used.  The new pixel
+    // buffer MUST have the same pixel format as the old one - if not you
+    // should call init() instead.
+    void setPixelBuffer(PixelBuffer* pb_) { pb = pb_; }
+
+    // setOffset() sets an offset which is subtracted from the coordinates of
+    // the rectangle given to getImage().
+    void setOffset(const Point& offset_) { offset = offset_; }
+
+  private:
+    bool economic;
+    PixelBuffer* pb;
+    PixelFormat outPF;
+    rdr::U8* table;
+    transFnType transFn;
+    ColourCube* cube;
+    Point offset;
+  };
+}
+#endif
diff --git a/common/rfb/TransferQueue.cxx b/common/rfb/TransferQueue.cxx
new file mode 100644
index 00000000..01807524
--- /dev/null
+++ b/common/rfb/TransferQueue.cxx
@@ -0,0 +1,311 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- TransferQueue.
+
+#include <rfb/TransferQueue.h>
+
+using namespace rfb;
+
+TransferQueue::TransferQueue()
+{
+	 m_numEntries = 0;
+     m_pEntries = NULL;
+}
+
+TransferQueue::~TransferQueue()
+{
+  free();
+}
+
+void
+TransferQueue::add(TransferQueue *pTQ)
+{
+  for (unsigned int i = 0; i < pTQ->getNumEntries(); i++) {
+    add(pTQ->getLocPathAt(i), pTQ->getRemPathAt(i),	pTQ->getLocNameAt(i), 
+      pTQ->getRemNameAt(i), pTQ->getSizeAt(i), pTQ->getDataAt(i), pTQ->getFlagsAt(i));
+  }
+}
+
+void
+TransferQueue::add(char *pLocPath, char *pRemPath, FileInfo *pFI, unsigned int flags)
+{
+  char locPath[FT_FILENAME_SIZE];
+  char remPath[FT_FILENAME_SIZE];
+  strcpy(locPath, pLocPath);
+  strcpy(remPath, pRemPath);
+  
+  for (unsigned int i = 0; i < pFI->getNumEntries(); i++) {
+    add(locPath, remPath, pFI->getNameAt(i), pFI->getNameAt(i), 
+      pFI->getSizeAt(i), pFI->getDataAt(i), (pFI->getFlagsAt(i) | flags));
+  }
+}
+
+void 
+TransferQueue::add(char *pLocPath, char *pRemPath, char *pLocName, char *pRemName, 
+                   unsigned int size, unsigned int data, unsigned int flags)
+{
+  FILEINFOEX *pTemporary = new FILEINFOEX[m_numEntries + 1];
+  if (m_numEntries != 0) 
+    memcpy(pTemporary, m_pEntries, m_numEntries * sizeof(FILEINFOEX));
+  
+  strcpy(pTemporary[m_numEntries].locPath, pLocPath);
+  strcpy(pTemporary[m_numEntries].locName, pLocName);
+  strcpy(pTemporary[m_numEntries].remPath, pRemPath);
+  strcpy(pTemporary[m_numEntries].remName, pRemName);
+  
+  pTemporary[m_numEntries].info.size = size;
+  pTemporary[m_numEntries].info.data = data;
+  pTemporary[m_numEntries].info.flags = flags;
+  
+  if (m_pEntries != NULL) {
+    delete [] m_pEntries;
+    m_pEntries = NULL;
+  }
+  
+  m_pEntries = pTemporary;
+  pTemporary = NULL;
+  m_numEntries++;
+}
+
+char *
+TransferQueue::getLocPathAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].locPath;
+  }
+  return NULL;
+}
+
+char *
+TransferQueue::getLocNameAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].locName;
+  }
+  return NULL;
+}
+
+char *
+TransferQueue::getRemPathAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].remPath;
+  }
+  return NULL;
+}
+
+char *
+TransferQueue::getRemNameAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].remName;
+  }
+  return NULL;
+}
+
+char *
+TransferQueue::getFullLocPathAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    sprintf(m_szFullLocPath, "%s\\%s", getLocPathAt(number), getLocNameAt(number));
+    return m_szFullLocPath;
+  }
+  return NULL;
+}
+
+char *
+TransferQueue::getFullRemPathAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    sprintf(m_szFullRemPath, "%s\\%s", getRemPathAt(number), getRemNameAt(number));
+    return m_szFullRemPath;
+  }
+  return NULL;
+}
+
+SIZEDATAFLAGSINFO * 
+TransferQueue::getSizeDataFlagsAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return &m_pEntries[number].info;
+  }
+  return NULL;
+}
+
+bool 
+TransferQueue::setLocPathAt(unsigned int number, char *pName)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    strcpy(m_pEntries[number].locPath, pName);
+    return true;
+  }
+  return false;
+}
+
+bool 
+TransferQueue::setLocNameAt(unsigned int number, char *pName)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    strcpy(m_pEntries[number].locName, pName);
+    return true;
+  }
+  return false;
+}
+
+bool 
+TransferQueue::setRemPathAt(unsigned int number, char *pName)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    strcpy(m_pEntries[number].remPath, pName);
+    return true;
+  }
+  return false;
+}
+
+bool 
+TransferQueue::setRemNameAt(unsigned int number, char *pName)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    strcpy(m_pEntries[number].remName, pName);
+    return true;
+  }
+  return false;
+}
+
+unsigned int
+TransferQueue::getSizeAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].info.size;
+  }
+  return 0;
+}
+
+unsigned int
+TransferQueue::getDataAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].info.data;
+  }
+  return 0;
+}
+
+unsigned int 
+TransferQueue::getFlagsAt(unsigned int number)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    return m_pEntries[number].info.flags;
+  }
+  return 0;
+}
+
+bool 
+TransferQueue::setSizeAt(unsigned int number, unsigned int value)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    m_pEntries[number].info.size = value;
+    return true;
+  }
+  return false;
+}
+
+bool 
+TransferQueue::setDataAt(unsigned int number, unsigned int value)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    m_pEntries[number].info.data = value;
+    return true;
+  }
+  return false;
+}
+
+bool 
+TransferQueue::setFlagsAt(unsigned int number, unsigned int value)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    m_pEntries[number].info.flags = m_pEntries[number].info.flags | value;
+    return true;
+  }
+  return false;
+}
+
+bool 
+TransferQueue::clearFlagAt(unsigned int number, unsigned int value)
+{
+  if ((number >= 0) && (number < m_numEntries)) {
+    m_pEntries[number].info.flags = (m_pEntries[number].info.flags & (value ^ 0xFFFFFFFF));
+    return true;
+  }
+  return false;
+}
+
+bool 
+TransferQueue::setFlagToAll(unsigned int flag)
+{
+  for (unsigned int i = 0; i < m_numEntries; i++) {
+    setFlagsAt(i, flag);
+  }
+  return true;
+}
+
+bool 
+TransferQueue::deleteAt(unsigned int number)
+{
+  if ((number >= m_numEntries) || (number < 0)) return false;
+  
+  FILEINFOEX *pTemporary = new FILEINFOEX[m_numEntries - 1];
+  
+  if (number == 0) {
+    memcpy(pTemporary, &m_pEntries[1], (m_numEntries - 1) * sizeof(FILEINFOEX));
+  } else {
+    memcpy(pTemporary, m_pEntries, number * sizeof(FILEINFOEX));
+    if (number != (m_numEntries - 1)) 
+      memcpy(&pTemporary[number], &m_pEntries[number + 1], (m_numEntries - number - 1) * sizeof(FILEINFOEX));
+  }
+  
+  if (m_pEntries != NULL) {
+    delete [] m_pEntries;
+    m_pEntries = NULL;
+  }
+  m_pEntries = pTemporary;
+  pTemporary = NULL;
+  m_numEntries--;
+  return true;
+}
+
+unsigned int 
+TransferQueue::getNumEntries()
+{
+  return m_numEntries;
+}
+
+void 
+TransferQueue::free()
+{
+  if (m_pEntries != NULL) {
+    delete [] m_pEntries;
+    m_pEntries = NULL;
+  }
+  m_numEntries = 0;
+}
diff --git a/common/rfb/TransferQueue.h b/common/rfb/TransferQueue.h
new file mode 100644
index 00000000..ba748e0e
--- /dev/null
+++ b/common/rfb/TransferQueue.h
@@ -0,0 +1,87 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ *
+ * TightVNC distribution homepage on the Web: http://www.tightvnc.com/
+ *
+ */
+
+// -=- TransferQueue.
+
+#ifndef __RFB_TRANSFERQUEUE_H__
+#define __RFB_TRANSFERQUEUE_H__
+
+#include <stdlib.h>
+
+#include <rfb/FileInfo.h>
+#include <rfb/fttypes.h>
+
+namespace rfb {
+  class TransferQueue  
+  {
+  public:
+    TransferQueue();
+    ~TransferQueue();
+
+    void add(TransferQueue *pTQ);
+    void add(char *pLocPath, char*pRemPath, FileInfo *pFI, unsigned int flags);
+    void add(char *pLocPath, char *pRemPath, char *pLocName, char *pRemName,
+      unsigned int size, unsigned int data, unsigned int flags);
+    
+    char *getLocPathAt(unsigned int number);
+    char *getLocNameAt(unsigned int number);
+    char *getRemPathAt(unsigned int number);
+    char *getRemNameAt(unsigned int number);
+    
+    char *getFullLocPathAt(unsigned int number);
+    char *getFullRemPathAt(unsigned int number);
+    
+    bool setLocPathAt(unsigned int number, char *pName);
+    bool setLocNameAt(unsigned int number, char *pName);
+    bool setRemPathAt(unsigned int number, char *pName);
+    bool setRemNameAt(unsigned int number, char *pName);
+    
+    unsigned int getSizeAt(unsigned int number);
+    unsigned int getDataAt(unsigned int number);
+    unsigned int getFlagsAt(unsigned int number);
+    
+    SIZEDATAFLAGSINFO * getSizeDataFlagsAt(unsigned int number);
+    
+    
+    bool setSizeAt(unsigned int number, unsigned int value);
+    bool setDataAt(unsigned int number, unsigned int value);
+    bool setFlagsAt(unsigned int number, unsigned int value);
+    bool clearFlagAt(unsigned int number, unsigned int value);
+    bool setFlagToAll(unsigned int flag);
+    
+    bool deleteAt(unsigned int number);
+    
+    unsigned int getNumEntries();
+    
+    void free();
+    
+  private:
+    FILEINFOEX *m_pEntries;
+    unsigned int m_numEntries;
+    
+    char m_szFullLocPath[FT_FILENAME_SIZE];
+    char m_szFullRemPath[FT_FILENAME_SIZE];
+  };
+}
+
+#endif // __RFB_TRANSFERQUEUE_H__
diff --git a/common/rfb/TrueColourMap.h b/common/rfb/TrueColourMap.h
new file mode 100644
index 00000000..1e87fa4c
--- /dev/null
+++ b/common/rfb/TrueColourMap.h
@@ -0,0 +1,42 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_TRUECOLOURMAP_H__
+#define __RFB_TRUECOLOURMAP_H__
+
+#include <rfb/ColourMap.h>
+
+namespace rfb {
+
+  class TrueColourMap : public ColourMap {
+  public:
+    TrueColourMap(const PixelFormat& pf_) : pf(pf_) {}
+
+    virtual void lookup(int i, int* r, int* g, int* b)
+    {
+      *r = (((i >> pf.redShift  ) & pf.redMax)
+            * 65535 + pf.redMax/2) / pf.redMax;
+      *g = (((i >> pf.greenShift) & pf.greenMax)
+            * 65535 + pf.greenMax/2) / pf.greenMax;
+      *b = (((i >> pf.blueShift) & pf.blueMax)
+            * 65535 + pf.blueMax/2) / pf.blueMax;
+    }
+  private:
+    PixelFormat pf;
+  };
+}
+#endif
diff --git a/common/rfb/UpdateTracker.cxx b/common/rfb/UpdateTracker.cxx
new file mode 100644
index 00000000..14ac49d7
--- /dev/null
+++ b/common/rfb/UpdateTracker.cxx
@@ -0,0 +1,156 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- rfbUpdateTracker.cpp
+//
+// Tracks updated regions and a region-copy event, too
+//
+
+#include <assert.h>
+
+#include <rfb/UpdateTracker.h>
+#include <rfb/LogWriter.h>
+
+using namespace rfb;
+
+static LogWriter vlog("UpdateTracker");
+
+
+// -=- ClippingUpdateTracker
+
+void ClippingUpdateTracker::add_changed(const Region &region) {
+  ut->add_changed(region.intersect(clipRect));
+}
+
+void ClippingUpdateTracker::add_copied(const Region &dest, const Point &delta) {
+  // Clip the destination to the display area
+  Region clipdest = dest.intersect(clipRect);
+  if (clipdest.is_empty())  return;
+
+  // Clip the source to the screen
+  Region tmp = clipdest;
+  tmp.translate(delta.negate());
+  tmp.assign_intersect(clipRect);
+  if (!tmp.is_empty()) {
+    // Translate the source back to a destination region
+    tmp.translate(delta);
+
+    // Pass the copy region to the child tracker
+    ut->add_copied(tmp, delta);
+  }
+
+  // And add any bits that we had to remove to the changed region
+  tmp = clipdest.subtract(tmp);
+  if (!tmp.is_empty())
+    ut->add_changed(tmp);
+}
+
+// SimpleUpdateTracker
+
+SimpleUpdateTracker::SimpleUpdateTracker(bool use_copyrect) {
+  copy_enabled = use_copyrect;
+}
+
+SimpleUpdateTracker::~SimpleUpdateTracker() {
+}
+
+void SimpleUpdateTracker::enable_copyrect(bool enable) {
+  if (!enable && copy_enabled) {
+    add_changed(copied);
+    copied.clear();
+  }
+  copy_enabled=enable;
+}
+
+void SimpleUpdateTracker::add_changed(const Region &region) {
+  changed.assign_union(region);
+}
+
+void SimpleUpdateTracker::add_copied(const Region &dest, const Point &delta) {
+  // Do we support copyrect?
+  if (!copy_enabled) {
+    add_changed(dest);
+    return;
+  }
+
+  // Is there anything to do?
+  if (dest.is_empty()) return;
+
+  // Calculate whether any of this copy can be treated as a continuation
+  // of an earlier one
+  Region src = dest;
+  src.translate(delta.negate());
+  Region overlap = src.intersect(copied);
+
+  if (overlap.is_empty()) {
+    // There is no overlap
+
+    Rect newbr = dest.get_bounding_rect();
+    Rect oldbr = copied.get_bounding_rect();
+    if (oldbr.area() > newbr.area()) {
+      // Old copyrect is (probably) bigger - use it
+      changed.assign_union(dest);
+    } else {
+      // New copyrect is probably bigger
+      // Use the new one
+      // But be careful not to copy stuff that still needs
+      // to be updated.
+      Region invalid_src = src.intersect(changed);
+      invalid_src.translate(delta);
+      changed.assign_union(invalid_src);
+      changed.assign_union(copied);
+      copied = dest;
+      copy_delta = delta;
+    }
+    return;
+  }
+
+  Region invalid_src = overlap.intersect(changed);
+  invalid_src.translate(delta);
+  changed.assign_union(invalid_src);
+  
+  overlap.translate(delta);
+
+  Region nonoverlapped_copied = dest.union_(copied).subtract(overlap);
+  changed.assign_union(nonoverlapped_copied);
+
+  copied = overlap;
+  copy_delta = copy_delta.translate(delta);
+
+  return;
+}
+
+void SimpleUpdateTracker::subtract(const Region& region) {
+  copied.assign_subtract(region);
+  changed.assign_subtract(region);
+}
+
+void SimpleUpdateTracker::getUpdateInfo(UpdateInfo* info, const Region& clip)
+{
+  copied.assign_subtract(changed);
+  info->changed = changed.intersect(clip);
+  info->copied = copied.intersect(clip);
+  info->copy_delta = copy_delta;
+}
+
+void SimpleUpdateTracker::copyTo(UpdateTracker* to) const {
+  if (!copied.is_empty())
+    to->add_copied(copied, copy_delta);
+  if (!changed.is_empty())
+    to->add_changed(changed);
+}
diff --git a/common/rfb/UpdateTracker.h b/common/rfb/UpdateTracker.h
new file mode 100644
index 00000000..5b51317a
--- /dev/null
+++ b/common/rfb/UpdateTracker.h
@@ -0,0 +1,103 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#ifndef __RFB_UPDATETRACKER_INCLUDED__
+#define __RFB_UPDATETRACKER_INCLUDED__
+
+#include <rfb/Rect.h>
+#include <rfb/Region.h>
+#include <rfb/PixelBuffer.h>
+
+namespace rfb {
+
+  class UpdateInfo {
+  public:
+    Region changed;
+    Region copied;
+    Point copy_delta;
+    bool is_empty() const {
+      return copied.is_empty() && changed.is_empty();
+    }
+    int numRects() const {
+      return copied.numRects() + changed.numRects();
+    }
+  };
+
+  class UpdateTracker {
+  public:
+    UpdateTracker() {};
+    virtual ~UpdateTracker() {};
+
+    virtual void add_changed(const Region &region) = 0;
+    virtual void add_copied(const Region &dest, const Point &delta) = 0;
+  };
+
+  class ClippingUpdateTracker : public UpdateTracker {
+  public:
+    ClippingUpdateTracker() : ut(0) {}
+    ClippingUpdateTracker(UpdateTracker* ut_, const Rect& r=Rect()) : ut(ut_), clipRect(r) {}
+    
+    void setUpdateTracker(UpdateTracker* ut_) {ut = ut_;}
+    void setClipRect(const Rect& cr) {clipRect = cr;}
+
+    virtual void add_changed(const Region &region);
+    virtual void add_copied(const Region &dest, const Point &delta);
+  protected:
+    UpdateTracker* ut;
+    Region clipRect;
+  };
+
+  class SimpleUpdateTracker : public UpdateTracker {
+  public:
+    SimpleUpdateTracker(bool use_copyrect=true);
+    virtual ~SimpleUpdateTracker();
+
+    virtual void enable_copyrect(bool enable);
+
+    virtual void add_changed(const Region &region);
+    virtual void add_copied(const Region &dest, const Point &delta);
+    virtual void subtract(const Region& region);
+
+    // Fill the supplied UpdateInfo structure with update information
+    virtual void getUpdateInfo(UpdateInfo* info, const Region& cliprgn);
+
+    // Copy the contained updates to another tracker
+    virtual void copyTo(UpdateTracker* to) const;
+
+
+    // Get the changed/copied regions
+    const Region& get_changed() const {return changed;}
+    const Region& get_copied() const {return copied;}
+    const Point& get_delta() const {return copy_delta;}
+
+    // Move the entire update region by an offset
+    void translate(const Point& p) {changed.translate(p); copied.translate(p);}
+
+    virtual bool is_empty() const {return changed.is_empty() && copied.is_empty();}
+
+    virtual void clear() {changed.clear(); copied.clear();};
+  protected:
+    Region changed;
+    Region copied;
+    Point copy_delta;
+    bool copy_enabled;
+  };
+
+}
+
+#endif // __RFB_UPDATETRACKER_INCLUDED__
diff --git a/common/rfb/UserPasswdGetter.h b/common/rfb/UserPasswdGetter.h
new file mode 100644
index 00000000..18b0bae3
--- /dev/null
+++ b/common/rfb/UserPasswdGetter.h
@@ -0,0 +1,30 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_USERPASSWDGETTER_H__
+#define __RFB_USERPASSWDGETTER_H__
+namespace rfb {
+  class UserPasswdGetter {
+  public:
+    // getUserPasswd gets the username and password.  This might involve a
+    // dialog, getpass(), etc.  The user buffer pointer can be null, in which
+    // case no user name will be retrieved.  The caller MUST delete [] the
+    // result(s).
+    virtual void getUserPasswd(char** user, char** password)=0;
+  };
+}
+#endif
diff --git a/common/rfb/VNCSConnectionST.cxx b/common/rfb/VNCSConnectionST.cxx
new file mode 100644
index 00000000..fe60e431
--- /dev/null
+++ b/common/rfb/VNCSConnectionST.cxx
@@ -0,0 +1,714 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <rfb/VNCSConnectionST.h>
+#include <rfb/LogWriter.h>
+#include <rfb/secTypes.h>
+#include <rfb/ServerCore.h>
+#include <rfb/ComparingUpdateTracker.h>
+#include <rfb/KeyRemapper.h>
+#define XK_MISCELLANY
+#define XK_XKB_KEYS
+#include <rfb/keysymdef.h>
+
+using namespace rfb;
+
+static LogWriter vlog("VNCSConnST");
+
+VNCSConnectionST::VNCSConnectionST(VNCServerST* server_, network::Socket *s,
+                                   bool reverse)
+  : SConnection(server_->securityFactory, reverse), sock(s), server(server_),
+    updates(false), image_getter(server->useEconomicTranslate),
+    drawRenderedCursor(false), removeRenderedCursor(false),
+    pointerEventTime(0), accessRights(AccessDefault),
+    startTime(time(0)), m_pFileTransfer(0)
+{
+  setStreams(&sock->inStream(), &sock->outStream());
+  peerEndpoint.buf = sock->getPeerEndpoint();
+  VNCServerST::connectionsLog.write(1,"accepted: %s", peerEndpoint.buf);
+
+  // Configure the socket
+  setSocketTimeouts();
+  lastEventTime = time(0);
+
+  // Add this client to the VNCServerST
+  if (server->m_pFTManager != NULL) {
+    SFileTransfer *pFT = server->m_pFTManager->createObject(sock);
+    if (pFT != NULL) {
+      m_pFileTransfer = pFT;
+    }
+  }
+
+  server->clients.push_front(this);
+}
+
+
+VNCSConnectionST::~VNCSConnectionST()
+{
+  // If we reach here then VNCServerST is deleting us!
+  VNCServerST::connectionsLog.write(1,"closed: %s (%s)",
+                                    peerEndpoint.buf,
+                                    (closeReason.buf) ? closeReason.buf : "");
+
+  // Release any keys the client still had pressed
+  std::set<rdr::U32>::iterator i;
+  for (i=pressedKeys.begin(); i!=pressedKeys.end(); i++)
+    server->desktop->keyEvent(*i, false);
+  if (server->pointerClient == this)
+    server->pointerClient = 0;
+
+  if (m_pFileTransfer) 
+    server->m_pFTManager->destroyObject(m_pFileTransfer);
+
+  // Remove this client from the server
+  server->clients.remove(this);
+
+}
+
+
+// Methods called from VNCServerST
+
+bool VNCSConnectionST::init()
+{
+  try {
+    initialiseProtocol();
+  } catch (rdr::Exception& e) {
+    close(e.str());
+    return false;
+  }
+  return true;
+}
+
+void VNCSConnectionST::close(const char* reason)
+{
+  // Log the reason for the close
+  if (!closeReason.buf)
+    closeReason.buf = strDup(reason);
+  else
+    vlog.debug("second close: %s (%s)", peerEndpoint.buf, reason);
+
+  if (authenticated()) {
+      server->lastDisconnectTime = time(0);
+  }
+
+  // Just shutdown the socket and mark our state as closing.  Eventually the
+  // calling code will call VNCServerST's removeSocket() method causing us to
+  // be deleted.
+  sock->shutdown();
+  setState(RFBSTATE_CLOSING);
+}
+
+
+void VNCSConnectionST::processMessages()
+{
+  if (state() == RFBSTATE_CLOSING) return;
+  try {
+    // - Now set appropriate socket timeouts and process data
+    setSocketTimeouts();
+    bool clientsReadyBefore = server->clientsReadyForUpdate();
+
+    while (getInStream()->checkNoWait(1)) {
+      processMsg();
+    }
+
+    if (!clientsReadyBefore && !requested.is_empty())
+      server->desktop->framebufferUpdateRequest();
+  } catch (rdr::EndOfStream&) {
+    close("Clean disconnection");
+  } catch (rdr::Exception &e) {
+    close(e.str());
+  }
+}
+
+void VNCSConnectionST::writeFramebufferUpdateOrClose()
+{
+  try {
+    writeFramebufferUpdate();
+  } catch(rdr::Exception &e) {
+    close(e.str());
+  }
+}
+
+void VNCSConnectionST::pixelBufferChange()
+{
+  try {
+    if (!authenticated()) return;
+    if (cp.width && cp.height && (server->pb->width() != cp.width ||
+                                  server->pb->height() != cp.height))
+    {
+      // We need to clip the next update to the new size, but also add any
+      // extra bits if it's bigger.  If we wanted to do this exactly, something
+      // like the code below would do it, but at the moment we just update the
+      // entire new size.  However, we do need to clip the renderedCursorRect
+      // because that might be added to updates in writeFramebufferUpdate().
+
+      //updates.intersect(server->pb->getRect());
+      //
+      //if (server->pb->width() > cp.width)
+      //  updates.add_changed(Rect(cp.width, 0, server->pb->width(),
+      //                           server->pb->height()));
+      //if (server->pb->height() > cp.height)
+      //  updates.add_changed(Rect(0, cp.height, cp.width,
+      //                           server->pb->height()));
+
+      renderedCursorRect = renderedCursorRect.intersect(server->pb->getRect());
+
+      cp.width = server->pb->width();
+      cp.height = server->pb->height();
+      if (state() == RFBSTATE_NORMAL) {
+        if (!writer()->writeSetDesktopSize()) {
+          close("Client does not support desktop resize");
+          return;
+        }
+      }
+    }
+    // Just update the whole screen at the moment because we're too lazy to
+    // work out what's actually changed.
+    updates.clear();
+    updates.add_changed(server->pb->getRect());
+    vlog.debug("pixel buffer changed - re-initialising image getter");
+    image_getter.init(server->pb, cp.pf(), writer());
+    if (writer()->needFakeUpdate())
+      writeFramebufferUpdate();
+  } catch(rdr::Exception &e) {
+    close(e.str());
+  }
+}
+
+void VNCSConnectionST::setColourMapEntriesOrClose(int firstColour,int nColours)
+{
+  try {
+    setColourMapEntries(firstColour, nColours);
+  } catch(rdr::Exception& e) {
+    close(e.str());
+  }
+}
+
+void VNCSConnectionST::bell()
+{
+  try {
+    if (state() == RFBSTATE_NORMAL) writer()->writeBell();
+  } catch(rdr::Exception& e) {
+    close(e.str());
+  }
+}
+
+void VNCSConnectionST::serverCutText(const char *str, int len)
+{
+  try {
+    if (!(accessRights & AccessCutText)) return;
+    if (!rfb::Server::sendCutText) return;
+    if (state() == RFBSTATE_NORMAL)
+      writer()->writeServerCutText(str, len);
+  } catch(rdr::Exception& e) {
+    close(e.str());
+  }
+}
+
+void VNCSConnectionST::setCursorOrClose()
+{
+  try {
+    setCursor();
+  } catch(rdr::Exception& e) {
+    close(e.str());
+  }
+}
+
+
+int VNCSConnectionST::checkIdleTimeout()
+{
+  int idleTimeout = rfb::Server::idleTimeout;
+  if (idleTimeout == 0) return 0;
+  if (state() != RFBSTATE_NORMAL && idleTimeout < 15)
+    idleTimeout = 15; // minimum of 15 seconds while authenticating
+  time_t now = time(0);
+  if (now < lastEventTime) {
+    // Someone must have set the time backwards.  Set lastEventTime so that the
+    // idleTimeout will count from now.
+    vlog.info("Time has gone backwards - resetting idle timeout");
+    lastEventTime = now;
+  }
+  int timeLeft = lastEventTime + idleTimeout - now;
+  if (timeLeft < -60) {
+    // Our callback is over a minute late - someone must have set the time
+    // forwards.  Set lastEventTime so that the idleTimeout will count from
+    // now.
+    vlog.info("Time has gone forwards - resetting idle timeout");
+    lastEventTime = now;
+    return secsToMillis(idleTimeout);
+  }
+  if (timeLeft <= 0) {
+    close("Idle timeout");
+    return 0;
+  }
+  return secsToMillis(timeLeft);
+}
+
+// renderedCursorChange() is called whenever the server-side rendered cursor
+// changes shape or position.  It ensures that the next update will clean up
+// the old rendered cursor and if necessary draw the new rendered cursor.
+
+void VNCSConnectionST::renderedCursorChange()
+{
+  if (state() != RFBSTATE_NORMAL) return;
+  removeRenderedCursor = true;
+  if (needRenderedCursor())
+    drawRenderedCursor = true;
+}
+
+// needRenderedCursor() returns true if this client needs the server-side
+// rendered cursor.  This may be because it does not support local cursor or
+// because the current cursor position has not been set by this client.
+// Unfortunately we can't know for sure when the current cursor position has
+// been set by this client.  We guess that this is the case when the current
+// cursor position is the same as the last pointer event from this client, or
+// if it is a very short time since this client's last pointer event (up to a
+// second).  [ Ideally we should do finer-grained timing here and make the time
+// configurable, but I don't think it's that important. ]
+
+bool VNCSConnectionST::needRenderedCursor()
+{
+  return (state() == RFBSTATE_NORMAL
+          && (!cp.supportsLocalCursor && !cp.supportsLocalXCursor
+              || (!server->cursorPos.equals(pointerEventPos) &&
+                  (time(0) - pointerEventTime) > 0)));
+}
+
+
+void VNCSConnectionST::approveConnectionOrClose(bool accept,
+                                                const char* reason)
+{
+  try {
+    approveConnection(accept, reason);
+  } catch (rdr::Exception& e) {
+    close(e.str());
+  }
+}
+
+
+
+// -=- Callbacks from SConnection
+
+void VNCSConnectionST::authSuccess()
+{
+  lastEventTime = time(0);
+
+  server->startDesktop();
+
+  // - Set the connection parameters appropriately
+  cp.width = server->pb->width();
+  cp.height = server->pb->height();
+  cp.setName(server->getName());
+  
+  // - Set the default pixel format
+  cp.setPF(server->pb->getPF());
+  char buffer[256];
+  cp.pf().print(buffer, 256);
+  vlog.info("Server default pixel format %s", buffer);
+  image_getter.init(server->pb, cp.pf(), 0);
+
+  // - Mark the entire display as "dirty"
+  updates.add_changed(server->pb->getRect());
+  startTime = time(0);
+}
+
+void VNCSConnectionST::queryConnection(const char* userName)
+{
+  // - Authentication succeeded - clear from blacklist
+  CharArray name; name.buf = sock->getPeerAddress();
+  server->blHosts->clearBlackmark(name.buf);
+
+  // - Special case to provide a more useful error message
+  if (rfb::Server::neverShared && !rfb::Server::disconnectClients &&
+    server->authClientCount() > 0) {
+    approveConnection(false, "The server is already in use");
+    return;
+  }
+
+  // - Does the client have the right to bypass the query?
+  if (reverseConnection ||
+      !(rfb::Server::queryConnect || sock->requiresQuery()) ||
+      (accessRights & AccessNoQuery))
+  {
+    approveConnection(true);
+    return;
+  }
+
+  // - Get the server to display an Accept/Reject dialog, if required
+  //   If a dialog is displayed, the result will be PENDING, and the
+  //   server will call approveConnection at a later time
+  CharArray reason;
+  VNCServerST::queryResult qr = server->queryConnection(sock, userName,
+                                                        &reason.buf);
+  if (qr == VNCServerST::PENDING)
+    return;
+
+  // - If server returns ACCEPT/REJECT then pass result to SConnection
+  approveConnection(qr == VNCServerST::ACCEPT, reason.buf);
+}
+
+void VNCSConnectionST::clientInit(bool shared)
+{
+  lastEventTime = time(0);
+  if (rfb::Server::alwaysShared || reverseConnection) shared = true;
+  if (rfb::Server::neverShared) shared = false;
+  if (!shared) {
+    if (rfb::Server::disconnectClients) {
+      // - Close all the other connected clients
+      vlog.debug("non-shared connection - closing clients");
+      server->closeClients("Non-shared connection requested", getSock());
+    } else {
+      // - Refuse this connection if there are existing clients, in addition to
+      // this one
+      if (server->authClientCount() > 1) {
+        close("Server is already in use");
+        return;
+      }
+    }
+  }
+  SConnection::clientInit(shared);
+}
+
+void VNCSConnectionST::setPixelFormat(const PixelFormat& pf)
+{
+  SConnection::setPixelFormat(pf);
+  char buffer[256];
+  pf.print(buffer, 256);
+  vlog.info("Client pixel format %s", buffer);
+  image_getter.init(server->pb, pf, writer());
+  setCursor();
+}
+
+void VNCSConnectionST::pointerEvent(const Point& pos, int buttonMask)
+{
+  pointerEventTime = lastEventTime = time(0);
+  server->lastUserInputTime = lastEventTime;
+  if (!(accessRights & AccessPtrEvents)) return;
+  if (!rfb::Server::acceptPointerEvents) return;
+  if (!server->pointerClient || server->pointerClient == this) {
+    pointerEventPos = pos;
+    if (buttonMask)
+      server->pointerClient = this;
+    else
+      server->pointerClient = 0;
+    server->desktop->pointerEvent(pointerEventPos, buttonMask);
+  }
+}
+
+
+class VNCSConnectionSTShiftPresser {
+public:
+  VNCSConnectionSTShiftPresser(SDesktop* desktop_)
+    : desktop(desktop_), pressed(false) {}
+  ~VNCSConnectionSTShiftPresser() {
+    if (pressed) { desktop->keyEvent(XK_Shift_L, false); }
+  }
+  void press() {
+    desktop->keyEvent(XK_Shift_L, true);
+    pressed = true;
+  }
+  SDesktop* desktop;
+  bool pressed;
+};
+
+// keyEvent() - record in the pressedKeys which keys were pressed.  Allow
+// multiple down events (for autorepeat), but only allow a single up event.
+void VNCSConnectionST::keyEvent(rdr::U32 key, bool down) {
+  lastEventTime = time(0);
+  server->lastUserInputTime = lastEventTime;
+  if (!(accessRights & AccessKeyEvents)) return;
+  if (!rfb::Server::acceptKeyEvents) return;
+
+  // Remap the key if required
+  if (server->keyRemapper)
+    key = server->keyRemapper->remapKey(key);
+
+  // Turn ISO_Left_Tab into shifted Tab.
+  VNCSConnectionSTShiftPresser shiftPresser(server->desktop);
+  if (key == XK_ISO_Left_Tab) {
+    if (pressedKeys.find(XK_Shift_L) == pressedKeys.end() &&
+        pressedKeys.find(XK_Shift_R) == pressedKeys.end())
+      shiftPresser.press();
+    key = XK_Tab;
+  }
+
+  if (down) {
+    pressedKeys.insert(key);
+  } else {
+    if (!pressedKeys.erase(key)) return;
+  }
+  server->desktop->keyEvent(key, down);
+}
+
+void VNCSConnectionST::clientCutText(const char* str, int len)
+{
+  if (!(accessRights & AccessCutText)) return;
+  if (!rfb::Server::acceptCutText) return;
+  server->desktop->clientCutText(str, len);
+}
+
+void VNCSConnectionST::framebufferUpdateRequest(const Rect& r,bool incremental)
+{
+  if (!(accessRights & AccessView)) return;
+
+  SConnection::framebufferUpdateRequest(r, incremental);
+
+  Region reqRgn(r);
+  requested.assign_union(reqRgn);
+
+  if (!incremental) {
+    // Non-incremental update - treat as if area requested has changed
+    updates.add_changed(reqRgn);
+    server->comparer->add_changed(reqRgn);
+  }
+
+  writeFramebufferUpdate();
+}
+
+void VNCSConnectionST::setInitialColourMap()
+{
+  setColourMapEntries(0, 0);
+}
+
+// supportsLocalCursor() is called whenever the status of
+// cp.supportsLocalCursor has changed.  If the client does now support local
+// cursor, we make sure that the old server-side rendered cursor is cleaned up
+// and the cursor is sent to the client.
+
+void VNCSConnectionST::supportsLocalCursor()
+{
+  if (cp.supportsLocalCursor || cp.supportsLocalXCursor) {
+    removeRenderedCursor = true;
+    drawRenderedCursor = false;
+    setCursor();
+  }
+}
+
+void VNCSConnectionST::writeSetCursorCallback()
+{
+  if (cp.supportsLocalXCursor) {
+    Pixel pix0, pix1;
+    rdr::U8Array bitmap(server->cursor.getBitmap(&pix0, &pix1));
+    if (bitmap.buf) {
+      // The client supports XCursor and the cursor only has two
+      // colors. Use the XCursor encoding.
+      writer()->writeSetXCursor(server->cursor.width(),
+				server->cursor.height(),
+				server->cursor.hotspot.x,
+				server->cursor.hotspot.y,
+				bitmap.buf, server->cursor.mask.buf);
+      return;
+    } else {
+      // More than two colors
+      if (!cp.supportsLocalCursor) {
+	// FIXME: We could reduce to two colors. 
+	vlog.info("Unable to send multicolor cursor: RichCursor not supported by client");
+	return;
+      }
+    }
+  }
+
+  // Use RichCursor
+  rdr::U8* transData = writer()->getImageBuf(server->cursor.area());
+  image_getter.translatePixels(server->cursor.data, transData,
+			       server->cursor.area());
+  writer()->writeSetCursor(server->cursor.width(),
+                           server->cursor.height(),
+                           server->cursor.hotspot,
+                           transData, server->cursor.mask.buf);
+}
+
+
+void VNCSConnectionST::writeFramebufferUpdate()
+{
+  if (state() != RFBSTATE_NORMAL || requested.is_empty()) return;
+
+  server->checkUpdate();
+
+  // If the previous position of the rendered cursor overlaps the source of the
+  // copy, then when the copy happens the corresponding rectangle in the
+  // destination will be wrong, so add it to the changed region.
+
+  if (!updates.get_copied().is_empty() && !renderedCursorRect.is_empty()) {
+    Rect bogusCopiedCursor = (renderedCursorRect.translate(updates.get_delta())
+                              .intersect(server->pb->getRect()));
+    if (!updates.get_copied().intersect(bogusCopiedCursor).is_empty()) {
+      updates.add_changed(bogusCopiedCursor);
+    }
+  }
+
+  // If we need to remove the old rendered cursor, just add the rectangle to
+  // the changed region.
+
+  if (removeRenderedCursor) {
+    updates.add_changed(renderedCursorRect);
+    renderedCursorRect.clear();
+    removeRenderedCursor = false;
+  }
+
+  // Return if there is nothing to send the client.
+
+  if (updates.is_empty() && !writer()->needFakeUpdate() && !drawRenderedCursor)
+    return;
+
+  // If the client needs a server-side rendered cursor, work out the cursor
+  // rectangle.  If it's empty then don't bother drawing it, but if it overlaps
+  // with the update region, we need to draw the rendered cursor regardless of
+  // whether it has changed.
+
+  if (needRenderedCursor()) {
+    renderedCursorRect
+      = (server->renderedCursor.getRect(server->renderedCursorTL)
+         .intersect(requested.get_bounding_rect()));
+
+    if (renderedCursorRect.is_empty()) {
+      drawRenderedCursor = false;
+    } else if (!updates.get_changed().union_(updates.get_copied())
+               .intersect(renderedCursorRect).is_empty()) {
+      drawRenderedCursor = true;
+    }
+
+    // We could remove the new cursor rect from updates here.  It's not clear
+    // whether this is worth it.  If we do remove it, then we won't draw over
+    // the same bit of screen twice, but we have the overhead of a more complex
+    // region.
+
+    //if (drawRenderedCursor)
+    //  updates.subtract(renderedCursorRect);
+  }
+
+  UpdateInfo update;
+  updates.enable_copyrect(cp.useCopyRect);
+  updates.getUpdateInfo(&update, requested);
+  if (!update.is_empty() || writer()->needFakeUpdate() || drawRenderedCursor) {
+    // Compute the number of rectangles. Tight encoder makes the things more
+    // complicated as compared to the original RealVNC.
+    writer()->setupCurrentEncoder();
+    int nRects = update.copied.numRects() + (drawRenderedCursor ? 1 : 0);
+    std::vector<Rect> rects;
+    std::vector<Rect>::const_iterator i;
+    update.changed.get_rects(&rects);
+    for (i = rects.begin(); i != rects.end(); i++) {
+      if (i->width() && i->height())
+	nRects += writer()->getNumRects(*i);
+    }
+    
+    writer()->writeFramebufferUpdateStart(nRects);
+    Region updatedRegion;
+    writer()->writeRects(update, &image_getter, &updatedRegion);
+    updates.subtract(updatedRegion);
+    if (drawRenderedCursor)
+      writeRenderedCursorRect();
+    writer()->writeFramebufferUpdateEnd();
+    requested.clear();
+  }
+}
+
+
+// writeRenderedCursorRect() writes a single rectangle drawing the rendered
+// cursor on the client.
+
+void VNCSConnectionST::writeRenderedCursorRect()
+{
+  image_getter.setPixelBuffer(&server->renderedCursor);
+  image_getter.setOffset(server->renderedCursorTL);
+
+  Rect actual;
+  writer()->writeRect(renderedCursorRect, &image_getter, &actual);
+
+  image_getter.setPixelBuffer(server->pb);
+  image_getter.setOffset(Point(0,0));
+
+  drawRenderedCursor = false;
+}
+
+void VNCSConnectionST::setColourMapEntries(int firstColour, int nColours)
+{
+  if (!readyForSetColourMapEntries) return;
+  if (server->pb->getPF().trueColour) return;
+
+  image_getter.setColourMapEntries(firstColour, nColours, writer());
+
+  if (cp.pf().trueColour) {
+    updates.add_changed(server->pb->getRect());
+  }
+}
+
+
+// setCursor() is called whenever the cursor has changed shape or pixel format.
+// If the client supports local cursor then it will arrange for the cursor to
+// be sent to the client.
+
+void VNCSConnectionST::setCursor()
+{
+  if (state() != RFBSTATE_NORMAL || !cp.supportsLocalCursor) return;
+  writer()->cursorChange(this);
+  if (writer()->needFakeUpdate())
+    writeFramebufferUpdate();
+}
+
+void VNCSConnectionST::setSocketTimeouts()
+{
+  int timeoutms = rfb::Server::clientWaitTimeMillis;
+  soonestTimeout(&timeoutms, secsToMillis(rfb::Server::idleTimeout));
+  if (timeoutms == 0)
+    timeoutms = -1;
+  sock->inStream().setTimeout(timeoutms);
+  sock->outStream().setTimeout(timeoutms);
+}
+
+char* VNCSConnectionST::getStartTime()
+{
+  char* result = ctime(&startTime);
+  result[24] = '\0';
+  return result; 
+}
+
+void VNCSConnectionST::setStatus(int status)
+{
+  switch (status) {
+  case 0:
+    accessRights = accessRights | AccessPtrEvents | AccessKeyEvents | AccessView;
+    break;
+  case 1:
+    accessRights = accessRights & !(AccessPtrEvents | AccessKeyEvents) | AccessView;
+    break;
+  case 2:
+    accessRights = accessRights & !(AccessPtrEvents | AccessKeyEvents | AccessView);
+    break;
+  }
+  framebufferUpdateRequest(server->pb->getRect(), false);
+}
+int VNCSConnectionST::getStatus()
+{
+  if ((accessRights & (AccessPtrEvents | AccessKeyEvents | AccessView)) == 0x0007)
+    return 0;
+  if ((accessRights & (AccessPtrEvents | AccessKeyEvents | AccessView)) == 0x0001)
+    return 1;
+  if ((accessRights & (AccessPtrEvents | AccessKeyEvents | AccessView)) == 0x0000)
+    return 2;
+  return 4;
+}
+
+bool VNCSConnectionST::processFTMsg(int type)
+{
+  if (m_pFileTransfer != NULL) 
+    return m_pFileTransfer->processMessages(type);
+  else 
+    return false;
+}
diff --git a/common/rfb/VNCSConnectionST.h b/common/rfb/VNCSConnectionST.h
new file mode 100644
index 00000000..a04296d3
--- /dev/null
+++ b/common/rfb/VNCSConnectionST.h
@@ -0,0 +1,176 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// VNCSConnectionST is our derived class of SConnection for VNCServerST - there
+// is one for each connected client.  We think of VNCSConnectionST as part of
+// the VNCServerST implementation, so its methods are allowed full access to
+// members of VNCServerST.
+//
+
+#ifndef __RFB_VNCSCONNECTIONST_H__
+#define __RFB_VNCSCONNECTIONST_H__
+
+#include <set>
+#include <rfb/SConnection.h>
+#include <rfb/SMsgWriter.h>
+#include <rfb/TransImageGetter.h>
+#include <rfb/VNCServerST.h>
+#include <rfb/SFileTransfer.h>
+
+namespace rfb {
+  class VNCSConnectionST : public SConnection,
+                           public WriteSetCursorCallback {
+  public:
+    VNCSConnectionST(VNCServerST* server_, network::Socket* s, bool reverse);
+    virtual ~VNCSConnectionST();
+
+    // Methods called from VNCServerST.  None of these methods ever knowingly
+    // throw an exception.
+
+    // Unless otherwise stated, the SConnectionST may not be valid after any of
+    // these methods are called, since they catch exceptions and may have
+    // called close() which deletes the object.
+
+    // init() must be called to initialise the protocol.  If it fails it
+    // returns false, and close() will have been called.
+    bool init();
+
+    // close() shuts down the socket to the client and deletes the
+    // SConnectionST object.
+    void close(const char* reason);
+
+    // processMessages() processes incoming messages from the client, invoking
+    // various callbacks as a result.  It continues to process messages until
+    // reading might block.  shutdown() will be called on the connection's
+    // Socket if an error occurs, via the close() call.
+    void processMessages();
+
+    void writeFramebufferUpdateOrClose();
+    void pixelBufferChange();
+    void setColourMapEntriesOrClose(int firstColour, int nColours);
+    void bell();
+    void serverCutText(const char *str, int len);
+    void setCursorOrClose();
+
+    // checkIdleTimeout() returns the number of milliseconds left until the
+    // idle timeout expires.  If it has expired, the connection is closed and
+    // zero is returned.  Zero is also returned if there is no idle timeout.
+    int checkIdleTimeout();
+
+    // The following methods never throw exceptions nor do they ever delete the
+    // SConnectionST object.
+
+    // renderedCursorChange() is called whenever the server-side rendered
+    // cursor changes shape or position.  It ensures that the next update will
+    // clean up the old rendered cursor and if necessary draw the new rendered
+    // cursor.
+    void renderedCursorChange();
+
+    // needRenderedCursor() returns true if this client needs the server-side
+    // rendered cursor.  This may be because it does not support local cursor
+    // or because the current cursor position has not been set by this client.
+    bool needRenderedCursor();
+
+    network::Socket* getSock() { return sock; }
+    bool readyForUpdate() { return !requested.is_empty(); }
+    void add_changed(const Region& region) { updates.add_changed(region); }
+    void add_copied(const Region& dest, const Point& delta) {
+      updates.add_copied(dest, delta);
+    }
+
+    const char* getPeerEndpoint() const {return peerEndpoint.buf;}
+
+    // approveConnectionOrClose() is called some time after
+    // VNCServerST::queryConnection() has returned with PENDING to accept or
+    // reject the connection.  The accept argument should be true for
+    // acceptance, or false for rejection, in which case a string reason may
+    // also be given.
+
+    void approveConnectionOrClose(bool accept, const char* reason);
+
+    char* getStartTime();
+
+    void setStatus(int status);
+    int getStatus();
+
+    bool processFTMsg(int type);
+
+  private:
+    // SConnection callbacks
+
+    // These methods are invoked as callbacks from processMsg().  Note that
+    // none of these methods should call any of the above methods which may
+    // delete the SConnectionST object.
+
+    virtual void authSuccess();
+    virtual void queryConnection(const char* userName);
+    virtual void clientInit(bool shared);
+    virtual void setPixelFormat(const PixelFormat& pf);
+    virtual void pointerEvent(const Point& pos, int buttonMask);
+    virtual void keyEvent(rdr::U32 key, bool down);
+    virtual void clientCutText(const char* str, int len);
+    virtual void framebufferUpdateRequest(const Rect& r, bool incremental);
+    virtual void setInitialColourMap();
+    virtual void supportsLocalCursor();
+
+    // setAccessRights() allows a security package to limit the access rights
+    // of a VNCSConnectioST to the server.  These access rights are applied
+    // such that the actual rights granted are the minimum of the server's
+    // default access settings and the connection's access settings.
+    virtual void setAccessRights(AccessRights ar) {accessRights=ar;}
+
+    // WriteSetCursorCallback
+    virtual void writeSetCursorCallback();
+
+    // Internal methods
+
+    // writeFramebufferUpdate() attempts to write a framebuffer update to the
+    // client.
+
+    void writeFramebufferUpdate();
+
+    void writeRenderedCursorRect();
+    void setColourMapEntries(int firstColour, int nColours);
+    void setCursor();
+    void setSocketTimeouts();
+
+    network::Socket* sock;
+    CharArray peerEndpoint;
+    VNCServerST* server;
+    SimpleUpdateTracker updates;
+    TransImageGetter image_getter;
+    Region requested;
+    bool drawRenderedCursor, removeRenderedCursor;
+    Rect renderedCursorRect;
+
+    std::set<rdr::U32> pressedKeys;
+
+    time_t lastEventTime;
+    time_t pointerEventTime;
+    Point pointerEventPos;
+
+    AccessRights accessRights;
+
+    CharArray closeReason;
+    time_t startTime;
+
+    SFileTransfer *m_pFileTransfer;
+  };
+}
+#endif
diff --git a/common/rfb/VNCServer.h b/common/rfb/VNCServer.h
new file mode 100644
index 00000000..df0fb0e5
--- /dev/null
+++ b/common/rfb/VNCServer.h
@@ -0,0 +1,86 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// VNCServer - abstract interface implemented by the RFB library.  The back-end
+// code calls the relevant methods as appropriate.
+
+#ifndef __RFB_VNCSERVER_H__
+#define __RFB_VNCSERVER_H__
+
+#include <rfb/UpdateTracker.h>
+#include <rfb/SSecurity.h>
+
+namespace rfb {
+
+  class VNCServer : public UpdateTracker {
+  public:
+
+    // setPixelBuffer() tells the server to use the given pixel buffer.  If
+    // this differs in size from the previous pixel buffer, this may result in
+    // protocol messages being sent, or clients being disconnected.
+    virtual void setPixelBuffer(PixelBuffer* pb) = 0;
+
+    // setColourMapEntries() tells the server that some entries in the colour
+    // map have changed.  The server will retrieve them via the PixelBuffer's
+    // ColourMap object.  This may result in protocol messages being sent.
+    // If nColours is 0, this means the rest of the colour map.
+    virtual void setColourMapEntries(int firstColour=0, int nColours=0) = 0;
+
+    // serverCutText() tells the server that the cut text has changed.  This
+    // will normally be sent to all clients.
+    virtual void serverCutText(const char* str, int len) = 0;
+
+    // bell() tells the server that it should make all clients make a bell sound.
+    virtual void bell() = 0;
+
+    // clientsReadyForUpdate() returns true if there is at least one client
+    // waiting for an update, false if no clients are ready.
+    virtual bool clientsReadyForUpdate() = 0;
+
+    // - Close all currently-connected clients, by calling
+    //   their close() method with the supplied reason.
+    virtual void closeClients(const char* reason) = 0;
+
+    // tryUpdate() causes the server to attempt to send updates to any waiting
+    // clients.
+    virtual void tryUpdate() = 0;
+
+    // setCursor() tells the server that the cursor has changed.  The
+    // cursorData argument contains width*height pixel values in the pixel
+    // buffer's format.  The mask argument is a bitmask with a 1-bit meaning
+    // the corresponding pixel in cursorData is valid.  The mask consists of
+    // left-to-right, top-to-bottom scanlines, where each scanline is padded to
+    // a whole number of bytes [(width+7)/8].  Within each byte the most
+    // significant bit represents the leftmost pixel, and the bytes are simply
+    // in left-to-right order.  The server takes its own copy of the data in
+    // cursorData and mask.
+    virtual void setCursor(int width, int height, const Point& hotspot,
+                           void* cursorData, void* mask) = 0;
+
+    // setCursorPos() tells the server the current position of the cursor.
+    virtual void setCursorPos(const Point& p) = 0;
+
+    // setSSecurityFactory() tells the server which factory to use when
+    // attempting to authenticate connections.
+    virtual void setSSecurityFactory(SSecurityFactory* f) = 0;
+
+    // setName() tells the server what desktop title to supply to clients
+    virtual void setName(const char* name) = 0;
+  };
+}
+#endif
diff --git a/common/rfb/VNCServerST.cxx b/common/rfb/VNCServerST.cxx
new file mode 100644
index 00000000..cc18faa3
--- /dev/null
+++ b/common/rfb/VNCServerST.cxx
@@ -0,0 +1,531 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- Single-Threaded VNC Server implementation
+
+
+// Note about how sockets get closed:
+//
+// Closing sockets to clients is non-trivial because the code which calls
+// VNCServerST must explicitly know about all the sockets (so that it can block
+// on them appropriately).  However, VNCServerST may want to close clients for
+// a number of reasons, and from a variety of entry points.  The simplest is
+// when processSocketEvent() is called for a client, and the remote end has
+// closed its socket.  A more complex reason is when processSocketEvent() is
+// called for a client which has just sent a ClientInit with the shared flag
+// set to false - in this case we want to close all other clients.  Yet another
+// reason for disconnecting clients is when the desktop size has changed as a
+// result of a call to setPixelBuffer().
+//
+// The responsibility for creating and deleting sockets is entirely with the
+// calling code.  When VNCServerST wants to close a connection to a client it
+// calls the VNCSConnectionST's close() method which calls shutdown() on the
+// socket.  Eventually the calling code will notice that the socket has been
+// shut down and call removeSocket() so that we can delete the
+// VNCSConnectionST.  Note that the socket must not be deleted by the calling
+// code until after removeSocket() has been called.
+//
+// One minor complication is that we don't allocate a VNCSConnectionST object
+// for a blacklisted host (since we want to minimise the resources used for
+// dealing with such a connection).  In order to properly implement the
+// getSockets function, we must maintain a separate closingSockets list,
+// otherwise blacklisted connections might be "forgotten".
+
+
+#include <rfb/ServerCore.h>
+#include <rfb/VNCServerST.h>
+#include <rfb/VNCSConnectionST.h>
+#include <rfb/ComparingUpdateTracker.h>
+#include <rfb/SSecurityFactoryStandard.h>
+#include <rfb/KeyRemapper.h>
+#include <rfb/util.h>
+
+#include <rdr/types.h>
+
+using namespace rfb;
+
+static LogWriter slog("VNCServerST");
+LogWriter VNCServerST::connectionsLog("Connections");
+static SSecurityFactoryStandard defaultSecurityFactory;
+
+//
+// -=- VNCServerST Implementation
+//
+
+// -=- Constructors/Destructor
+
+VNCServerST::VNCServerST(const char* name_, SDesktop* desktop_,
+                         SSecurityFactory* sf)
+  : blHosts(&blacklist), desktop(desktop_), desktopStarted(false), pb(0),
+    m_pFTManager(0), name(strDup(name_)), pointerClient(0), comparer(0),
+    renderedCursorInvalid(false),
+    securityFactory(sf ? sf : &defaultSecurityFactory),
+    queryConnectionHandler(0), keyRemapper(&KeyRemapper::defInstance),
+    useEconomicTranslate(false),
+    lastConnectionTime(0), disableclients(false)
+{
+  lastUserInputTime = lastDisconnectTime = time(0);
+  slog.debug("creating single-threaded server %s", name.buf);
+}
+
+VNCServerST::~VNCServerST()
+{
+  slog.debug("shutting down server %s", name.buf);
+
+  // Close any active clients, with appropriate logging & cleanup
+  closeClients("Server shutdown");
+
+  // Delete all the clients, and their sockets, and any closing sockets
+  //   NB: Deleting a client implicitly removes it from the clients list
+  while (!clients.empty()) {
+    delete clients.front();
+  }
+
+  // Stop the desktop object if active, *only* after deleting all clients!
+  if (desktopStarted) {
+    desktopStarted = false;
+    desktop->stop();
+  }
+
+  delete comparer;
+}
+
+
+// SocketServer methods
+
+void VNCServerST::addSocket(network::Socket* sock, bool outgoing)
+{
+  // - Check the connection isn't black-marked
+  // *** do this in getSecurity instead?
+  CharArray address(sock->getPeerAddress());
+  if (blHosts->isBlackmarked(address.buf)) {
+    connectionsLog.error("blacklisted: %s", address.buf);
+    try {
+      SConnection::writeConnFailedFromScratch("Too many security failures",
+                                              &sock->outStream());
+    } catch (rdr::Exception&) {
+    }
+    sock->shutdown();
+    closingSockets.push_back(sock);
+    return;
+  }
+
+  if (clients.empty()) {
+    lastConnectionTime = time(0);
+  }
+
+  VNCSConnectionST* client = new VNCSConnectionST(this, sock, outgoing);
+  client->init();
+}
+
+void VNCServerST::removeSocket(network::Socket* sock) {
+  // - If the socket has resources allocated to it, delete them
+  std::list<VNCSConnectionST*>::iterator ci;
+  for (ci = clients.begin(); ci != clients.end(); ci++) {
+    if ((*ci)->getSock() == sock) {
+      // - Delete the per-Socket resources
+      delete *ci;
+
+      // - Check that the desktop object is still required
+      if (authClientCount() == 0 && desktopStarted) {
+        slog.debug("no authenticated clients - stopping desktop");
+        desktopStarted = false;
+        desktop->stop();
+      }
+      return;
+    }
+  }
+
+  // - If the Socket has no resources, it may have been a closingSocket
+  closingSockets.remove(sock);
+}
+
+void VNCServerST::processSocketEvent(network::Socket* sock)
+{
+  // - Find the appropriate VNCSConnectionST and process the event
+  std::list<VNCSConnectionST*>::iterator ci;
+  for (ci = clients.begin(); ci != clients.end(); ci++) {
+    if ((*ci)->getSock() == sock) {
+      (*ci)->processMessages();
+      return;
+    }
+  }
+  throw rdr::Exception("invalid Socket in VNCServerST");
+}
+
+int VNCServerST::checkTimeouts()
+{
+  int timeout = 0;
+  std::list<VNCSConnectionST*>::iterator ci, ci_next;
+  for (ci=clients.begin();ci!=clients.end();ci=ci_next) {
+    ci_next = ci; ci_next++;
+    soonestTimeout(&timeout, (*ci)->checkIdleTimeout());
+  }
+
+  int timeLeft;
+  time_t now;
+
+  // Optimization: Only call time() if using any maxTime. 
+  if (rfb::Server::maxDisconnectionTime || rfb::Server::maxConnectionTime || rfb::Server::maxIdleTime) {
+    now = time(0);
+  }
+  
+  // Check MaxDisconnectionTime 
+  if (rfb::Server::maxDisconnectionTime && clients.empty()) {
+    if (now < lastDisconnectTime) {
+      // Someone must have set the time backwards. 
+      slog.info("Time has gone backwards - resetting lastDisconnectTime");
+      lastDisconnectTime = now;
+    }
+    timeLeft = lastDisconnectTime + rfb::Server::maxDisconnectionTime - now;
+    if (timeLeft < -60) {
+      // Someone must have set the time forwards.
+      slog.info("Time has gone forwards - resetting lastDisconnectTime");
+      lastDisconnectTime = now;
+      timeLeft = rfb::Server::maxDisconnectionTime;
+    }
+    if (timeLeft <= 0) { 
+      slog.info("MaxDisconnectionTime reached, exiting");
+      exit(0);
+    }
+    soonestTimeout(&timeout, timeLeft * 1000);
+  }
+
+  // Check MaxConnectionTime 
+  if (rfb::Server::maxConnectionTime && lastConnectionTime && !clients.empty()) {
+    if (now < lastConnectionTime) {
+      // Someone must have set the time backwards. 
+      slog.info("Time has gone backwards - resetting lastConnectionTime");
+      lastConnectionTime = now;
+    }
+    timeLeft = lastConnectionTime + rfb::Server::maxConnectionTime - now;
+    if (timeLeft < -60) {
+      // Someone must have set the time forwards.
+      slog.info("Time has gone forwards - resetting lastConnectionTime");
+      lastConnectionTime = now;
+      timeLeft = rfb::Server::maxConnectionTime;
+    }
+    if (timeLeft <= 0) {
+      slog.info("MaxConnectionTime reached, exiting");
+      exit(0);
+    }
+    soonestTimeout(&timeout, timeLeft * 1000);
+  }
+
+  
+  // Check MaxIdleTime 
+  if (rfb::Server::maxIdleTime) {
+    if (now < lastUserInputTime) {
+      // Someone must have set the time backwards. 
+      slog.info("Time has gone backwards - resetting lastUserInputTime");
+      lastUserInputTime = now;
+    }
+    timeLeft = lastUserInputTime + rfb::Server::maxIdleTime - now;
+    if (timeLeft < -60) {
+      // Someone must have set the time forwards.
+      slog.info("Time has gone forwards - resetting lastUserInputTime");
+      lastUserInputTime = now;
+      timeLeft = rfb::Server::maxIdleTime;
+    }
+    if (timeLeft <= 0) {
+      slog.info("MaxIdleTime reached, exiting");
+      exit(0);
+    }
+    soonestTimeout(&timeout, timeLeft * 1000);
+  }
+  
+  return timeout;
+}
+
+
+// VNCServer methods
+
+void VNCServerST::setPixelBuffer(PixelBuffer* pb_)
+{
+  pb = pb_;
+  delete comparer;
+  comparer = 0;
+
+  if (pb) {
+    comparer = new ComparingUpdateTracker(pb);
+    cursor.setPF(pb->getPF());
+    renderedCursor.setPF(pb->getPF());
+
+    std::list<VNCSConnectionST*>::iterator ci, ci_next;
+    for (ci=clients.begin();ci!=clients.end();ci=ci_next) {
+      ci_next = ci; ci_next++;
+      (*ci)->pixelBufferChange();
+    }
+  } else {
+    if (desktopStarted)
+      throw Exception("setPixelBuffer: null PixelBuffer when desktopStarted?");
+  }
+}
+
+void VNCServerST::setColourMapEntries(int firstColour, int nColours)
+{
+  std::list<VNCSConnectionST*>::iterator ci, ci_next;
+  for (ci = clients.begin(); ci != clients.end(); ci = ci_next) {
+    ci_next = ci; ci_next++;
+    (*ci)->setColourMapEntriesOrClose(firstColour, nColours);
+  }
+}
+
+void VNCServerST::bell()
+{
+  std::list<VNCSConnectionST*>::iterator ci, ci_next;
+  for (ci = clients.begin(); ci != clients.end(); ci = ci_next) {
+    ci_next = ci; ci_next++;
+    (*ci)->bell();
+  }
+}
+
+void VNCServerST::serverCutText(const char* str, int len)
+{
+  std::list<VNCSConnectionST*>::iterator ci, ci_next;
+  for (ci = clients.begin(); ci != clients.end(); ci = ci_next) {
+    ci_next = ci; ci_next++;
+    (*ci)->serverCutText(str, len);
+  }
+}
+
+void VNCServerST::add_changed(const Region& region)
+{
+  comparer->add_changed(region);
+}
+
+void VNCServerST::add_copied(const Region& dest, const Point& delta)
+{
+  comparer->add_copied(dest, delta);
+}
+
+bool VNCServerST::clientsReadyForUpdate()
+{
+  std::list<VNCSConnectionST*>::iterator ci;
+  for (ci = clients.begin(); ci != clients.end(); ci++) {
+    if ((*ci)->readyForUpdate())
+      return true;
+  }
+  return false;
+}
+
+void VNCServerST::tryUpdate()
+{
+  std::list<VNCSConnectionST*>::iterator ci, ci_next;
+  for (ci = clients.begin(); ci != clients.end(); ci = ci_next) {
+    ci_next = ci; ci_next++;
+    (*ci)->writeFramebufferUpdateOrClose();
+  }
+}
+
+void VNCServerST::setCursor(int width, int height, const Point& newHotspot,
+                            void* data, void* mask)
+{
+  cursor.hotspot = newHotspot;
+  cursor.setSize(width, height);
+  memcpy(cursor.data, data, cursor.dataLen());
+  memcpy(cursor.mask.buf, mask, cursor.maskLen());
+
+  cursor.crop();
+
+  renderedCursorInvalid = true;
+
+  std::list<VNCSConnectionST*>::iterator ci, ci_next;
+  for (ci = clients.begin(); ci != clients.end(); ci = ci_next) {
+    ci_next = ci; ci_next++;
+    (*ci)->renderedCursorChange();
+    (*ci)->setCursorOrClose();
+  }
+}
+
+void VNCServerST::setCursorPos(const Point& pos)
+{
+  if (!cursorPos.equals(pos)) {
+    cursorPos = pos;
+    renderedCursorInvalid = true;
+    std::list<VNCSConnectionST*>::iterator ci;
+    for (ci = clients.begin(); ci != clients.end(); ci++)
+      (*ci)->renderedCursorChange();
+  }
+}
+
+// Other public methods
+
+void VNCServerST::approveConnection(network::Socket* sock, bool accept,
+                                    const char* reason)
+{
+  std::list<VNCSConnectionST*>::iterator ci;
+  for (ci = clients.begin(); ci != clients.end(); ci++) {
+    if ((*ci)->getSock() == sock) {
+      (*ci)->approveConnectionOrClose(accept, reason);
+      return;
+    }
+  }
+}
+
+void VNCServerST::closeClients(const char* reason, network::Socket* except)
+{
+  std::list<VNCSConnectionST*>::iterator i, next_i;
+  for (i=clients.begin(); i!=clients.end(); i=next_i) {
+    next_i = i; next_i++;
+    if ((*i)->getSock() != except)
+      (*i)->close(reason);
+  }
+}
+
+void VNCServerST::getSockets(std::list<network::Socket*>* sockets)
+{
+  sockets->clear();
+  std::list<VNCSConnectionST*>::iterator ci;
+  for (ci = clients.begin(); ci != clients.end(); ci++) {
+    sockets->push_back((*ci)->getSock());
+  }
+  std::list<network::Socket*>::iterator si;
+  for (si = closingSockets.begin(); si != closingSockets.end(); si++) {
+    sockets->push_back(*si);
+  }
+}
+
+SConnection* VNCServerST::getSConnection(network::Socket* sock) {
+  std::list<VNCSConnectionST*>::iterator ci;
+  for (ci = clients.begin(); ci != clients.end(); ci++) {
+    if ((*ci)->getSock() == sock)
+      return *ci;
+  }
+  return 0;
+}
+
+
+// -=- Internal methods
+
+void VNCServerST::startDesktop()
+{
+  if (!desktopStarted) {
+    slog.debug("starting desktop");
+    desktop->start(this);
+    desktopStarted = true;
+    if (!pb)
+      throw Exception("SDesktop::start() did not set a valid PixelBuffer");
+  }
+}
+
+int VNCServerST::authClientCount() {
+  int count = 0;
+  std::list<VNCSConnectionST*>::iterator ci;
+  for (ci = clients.begin(); ci != clients.end(); ci++) {
+    if ((*ci)->authenticated())
+      count++;
+  }
+  return count;
+}
+
+inline bool VNCServerST::needRenderedCursor()
+{
+  std::list<VNCSConnectionST*>::iterator ci;
+  for (ci = clients.begin(); ci != clients.end(); ci++)
+    if ((*ci)->needRenderedCursor()) return true;
+  return false;
+}
+
+// checkUpdate() is called just before sending an update.  It checks to see
+// what updates are pending and propagates them to the update tracker for each
+// client.  It uses the ComparingUpdateTracker's compare() method to filter out
+// areas of the screen which haven't actually changed.  It also checks the
+// state of the (server-side) rendered cursor, if necessary rendering it again
+// with the correct background.
+
+void VNCServerST::checkUpdate()
+{
+  bool renderCursor = needRenderedCursor();
+
+  if (comparer->is_empty() && !(renderCursor && renderedCursorInvalid))
+    return;
+
+  Region toCheck = comparer->get_changed().union_(comparer->get_copied());
+
+  if (renderCursor) {
+    Rect clippedCursorRect
+      = cursor.getRect(cursorTL()).intersect(pb->getRect());
+
+    if (!renderedCursorInvalid && (toCheck.intersect(clippedCursorRect)
+                                   .is_empty())) {
+      renderCursor = false;
+    } else {
+      renderedCursorTL = clippedCursorRect.tl;
+      renderedCursor.setSize(clippedCursorRect.width(),
+                             clippedCursorRect.height());
+      toCheck.assign_union(clippedCursorRect);
+    }
+  }
+
+  pb->grabRegion(toCheck);
+
+  if (rfb::Server::compareFB)
+    comparer->compare();
+
+  if (renderCursor) {
+    pb->getImage(renderedCursor.data,
+                 renderedCursor.getRect(renderedCursorTL));
+    renderedCursor.maskRect(cursor.getRect(cursorTL()
+                                           .subtract(renderedCursorTL)),
+                            cursor.data, cursor.mask.buf);
+    renderedCursorInvalid = false;
+  }
+
+  std::list<VNCSConnectionST*>::iterator ci, ci_next;
+  for (ci = clients.begin(); ci != clients.end(); ci = ci_next) {
+    ci_next = ci; ci_next++;
+    (*ci)->add_copied(comparer->get_copied(), comparer->get_delta());
+    (*ci)->add_changed(comparer->get_changed());
+  }
+
+  comparer->clear();
+}
+
+void VNCServerST::getConnInfo(ListConnInfo * listConn)
+{
+  listConn->Clear();
+  listConn->setDisable(getDisable());
+  if (clients.empty())
+    return;
+  std::list<VNCSConnectionST*>::iterator i;
+  for (i = clients.begin(); i != clients.end(); i++)
+    listConn->addInfo((void*)(*i), (*i)->getSock()->getPeerAddress(),
+                      (*i)->getStartTime(), (*i)->getStatus());
+}
+
+void VNCServerST::setConnStatus(ListConnInfo* listConn)
+{
+  setDisable(listConn->getDisable());
+  if (listConn->Empty() || clients.empty()) return;
+  for (listConn->iBegin(); !listConn->iEnd(); listConn->iNext()) {
+    VNCSConnectionST* conn = (VNCSConnectionST*)listConn->iGetConn();
+    std::list<VNCSConnectionST*>::iterator i;
+    for (i = clients.begin(); i != clients.end(); i++) {
+      if ((*i) == conn) {
+        int status = listConn->iGetStatus();
+        if (status == 3) {
+          (*i)->close(0);
+        } else {
+          (*i)->setStatus(status);
+        }
+        break;
+      }
+    }
+  }
+}
diff --git a/common/rfb/VNCServerST.h b/common/rfb/VNCServerST.h
new file mode 100644
index 00000000..bc15b7f4
--- /dev/null
+++ b/common/rfb/VNCServerST.h
@@ -0,0 +1,245 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- VNCServerST.h
+
+// Single-threaded VNCServer implementation
+
+#ifndef __RFB_VNCSERVERST_H__
+#define __RFB_VNCSERVERST_H__
+
+#include <list>
+
+#include <rfb/SDesktop.h>
+#include <rfb/VNCServer.h>
+#include <rfb/Configuration.h>
+#include <rfb/LogWriter.h>
+#include <rfb/Blacklist.h>
+#include <rfb/Cursor.h>
+#include <network/Socket.h>
+#include <rfb/ListConnInfo.h>
+#include <rfb/SFileTransferManager.h>
+
+namespace rfb {
+
+  class VNCSConnectionST;
+  class ComparingUpdateTracker;
+  class PixelBuffer;
+  class KeyRemapper;
+
+  class VNCServerST : public VNCServer, public network::SocketServer {
+  public:
+    // -=- Constructors
+
+    //   Create a server exporting the supplied desktop.
+    VNCServerST(const char* name_, SDesktop* desktop_,
+                SSecurityFactory* securityFactory_=0);
+    virtual ~VNCServerST();
+
+
+    // Methods overridden from SocketServer
+
+    // addSocket
+    //   Causes the server to allocate an RFB-protocol management
+    //   structure for the socket & initialise it.
+    virtual void addSocket(network::Socket* sock, bool outgoing=false);
+
+    // removeSocket
+    //   Clean up any resources associated with the Socket
+    virtual void removeSocket(network::Socket* sock);
+
+    // processSocketEvent
+    //   Read more RFB data from the Socket.  If an error occurs during
+    //   processing then shutdown() is called on the Socket, causing
+    //   removeSocket() to be called by the caller at a later time.
+    virtual void processSocketEvent(network::Socket* sock);
+
+    // checkTimeouts
+    //   Returns the number of milliseconds left until the next idle timeout
+    //   expires.  If any have already expired, the corresponding connections
+    //   are closed.  Zero is returned if there is no idle timeout.
+    virtual int checkTimeouts();
+
+
+    // Methods overridden from VNCServer
+
+    virtual void setPixelBuffer(PixelBuffer* pb);
+    virtual void setColourMapEntries(int firstColour=0, int nColours=0);
+    virtual void serverCutText(const char* str, int len);
+    virtual void add_changed(const Region &region);
+    virtual void add_copied(const Region &dest, const Point &delta);
+    virtual bool clientsReadyForUpdate();
+    virtual void tryUpdate();
+    virtual void setCursor(int width, int height, const Point& hotspot,
+                           void* cursorData, void* mask);
+    virtual void setCursorPos(const Point& p);
+    virtual void setSSecurityFactory(SSecurityFactory* f) {securityFactory=f;}
+
+    virtual void bell();
+
+    // - Close all currently-connected clients, by calling
+    //   their close() method with the supplied reason.
+    virtual void closeClients(const char* reason) {closeClients(reason, 0);}
+
+    // VNCServerST-only methods
+
+    // closeClients() closes all RFB sessions, except the specified one (if
+    // any), and logs the specified reason for closure.
+    void closeClients(const char* reason, network::Socket* sock);
+
+    // getSockets() gets a list of sockets.  This can be used to generate an
+    // fd_set for calling select().
+
+    void getSockets(std::list<network::Socket*>* sockets);
+
+    // getSConnection() gets the SConnection for a particular Socket.  If
+    // the Socket is not recognised then null is returned.
+
+    SConnection* getSConnection(network::Socket* sock);
+
+    // getDesktopSize() returns the size of the SDesktop exported by this
+    // server.
+    Point getDesktopSize() const {return desktop->getFbSize();}
+
+    // getName() returns the name of this VNC Server.  NB: The value returned
+    // is the server's internal buffer which may change after any other methods
+    // are called - take a copy if necessary.
+    const char* getName() const {return name.buf;}
+
+    // setName() specifies the desktop name that the server should provide to
+    // clients
+    void setName(const char* name_) {name.replaceBuf(strDup(name_));}
+
+    // A QueryConnectionHandler, if supplied, is passed details of incoming
+    // connections to approve, reject, or query the user about.
+    //
+    // queryConnection() is called when a connection has been
+    // successfully authenticated.  The sock and userName arguments identify
+    // the socket and the name of the authenticated user, if any.  It should
+    // return ACCEPT if the connection should be accepted, REJECT if it should
+    // be rejected, or PENDING if a decision cannot yet be reached.  If REJECT
+    // is returned, *reason can be set to a string describing the reason - this
+    // will be delete[]ed when it is finished with.  If PENDING is returned,
+    // approveConnection() must be called some time later to accept or reject
+    // the connection.
+    enum queryResult { ACCEPT, REJECT, PENDING };
+    struct QueryConnectionHandler {
+      virtual ~QueryConnectionHandler() {}
+      virtual queryResult queryConnection(network::Socket* sock,
+                                          const char* userName,
+                                          char** reason) = 0;
+    };
+    void setQueryConnectionHandler(QueryConnectionHandler* qch) {
+      queryConnectionHandler = qch;
+    }
+
+    // queryConnection is called as described above, and either passes the
+    // request on to the registered handler, or accepts the connection if
+    // no handler has been specified.
+    virtual queryResult queryConnection(network::Socket* sock,
+                                        const char* userName,
+                                        char** reason) {
+      return queryConnectionHandler
+        ? queryConnectionHandler->queryConnection(sock, userName, reason)
+        : ACCEPT;
+    }
+
+    // approveConnection() is called by the active QueryConnectionHandler,
+    // some time after queryConnection() has returned with PENDING, to accept
+    // or reject the connection.  The accept argument should be true for
+    // acceptance, or false for rejection, in which case a string reason may
+    // also be given.
+    void approveConnection(network::Socket* sock, bool accept,
+                           const char* reason);
+
+    // setBlacklist() is called to replace the VNCServerST's internal
+    // Blacklist instance with another instance.  This allows a single
+    // Blacklist to be shared by multiple VNCServerST instances.
+    void setBlacklist(Blacklist* bl) {blHosts = bl ? bl : &blacklist;}
+
+    // setEconomicTranslate() determines (for new connections) whether pixels
+    // should be translated for <=16bpp clients using a large lookup table
+    // (fast) or separate, smaller R, G and B tables (slower).  If set to true,
+    // small tables are used, to save memory.
+    void setEconomicTranslate(bool et) { useEconomicTranslate = et; }
+
+    // setKeyRemapper() replaces the VNCServerST's default key remapper.
+    // NB: A null pointer is valid here.
+    void setKeyRemapper(KeyRemapper* kr) { keyRemapper = kr; }
+
+    void getConnInfo(ListConnInfo * listConn);
+    void setConnStatus(ListConnInfo* listConn);
+
+    bool getDisable() { return disableclients;};
+    void setDisable(bool disable) { disableclients = disable;};
+
+    void setFTManager(rfb::SFileTransferManager *pFTManager) { m_pFTManager = pFTManager; };
+
+  protected:
+
+    friend class VNCSConnectionST;
+
+    void startDesktop();
+
+    static LogWriter connectionsLog;
+    Blacklist blacklist;
+    Blacklist* blHosts;
+
+    SDesktop* desktop;
+    bool desktopStarted;
+    PixelBuffer* pb;
+
+    SFileTransferManager *m_pFTManager;
+
+    CharArray name;
+
+    std::list<VNCSConnectionST*> clients;
+    VNCSConnectionST* pointerClient;
+    std::list<network::Socket*> closingSockets;
+
+    ComparingUpdateTracker* comparer;
+
+    Point cursorPos;
+    Cursor cursor;
+    Point cursorTL() { return cursorPos.subtract(cursor.hotspot); }
+    Point renderedCursorTL;
+    ManagedPixelBuffer renderedCursor;
+    bool renderedCursorInvalid;
+
+    // - Check how many of the clients are authenticated.
+    int authClientCount();
+
+    bool needRenderedCursor();
+    void checkUpdate();
+
+    SSecurityFactory* securityFactory;
+    QueryConnectionHandler* queryConnectionHandler;
+    KeyRemapper* keyRemapper;
+    bool useEconomicTranslate;
+    
+    time_t lastUserInputTime;
+    time_t lastDisconnectTime;
+    time_t lastConnectionTime;
+
+    bool disableclients;
+  };
+
+};
+
+#endif
+
diff --git a/common/rfb/ZRLEDecoder.cxx b/common/rfb/ZRLEDecoder.cxx
new file mode 100644
index 00000000..b7c69129
--- /dev/null
+++ b/common/rfb/ZRLEDecoder.cxx
@@ -0,0 +1,91 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rfb/CMsgReader.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/ZRLEDecoder.h>
+
+using namespace rfb;
+
+#define EXTRA_ARGS CMsgHandler* handler
+#define FILL_RECT(r, p) handler->fillRect(r, p)
+#define IMAGE_RECT(r, p) handler->imageRect(r, p)
+#define BPP 8
+#include <rfb/zrleDecode.h>
+#undef BPP
+#define BPP 16
+#include <rfb/zrleDecode.h>
+#undef BPP
+#define BPP 32
+#include <rfb/zrleDecode.h>
+#define CPIXEL 24A
+#include <rfb/zrleDecode.h>
+#undef CPIXEL
+#define CPIXEL 24B
+#include <rfb/zrleDecode.h>
+#undef CPIXEL
+#undef BPP
+
+Decoder* ZRLEDecoder::create(CMsgReader* reader)
+{
+  return new ZRLEDecoder(reader);
+}
+
+ZRLEDecoder::ZRLEDecoder(CMsgReader* reader_) : reader(reader_)
+{
+}
+
+ZRLEDecoder::~ZRLEDecoder()
+{
+}
+
+void ZRLEDecoder::readRect(const Rect& r, CMsgHandler* handler)
+{
+  rdr::InStream* is = reader->getInStream();
+  rdr::U8* buf = reader->getImageBuf(64 * 64 * 4);
+  switch (reader->bpp()) {
+  case 8:  zrleDecode8 (r, is, &zis, (rdr::U8*) buf, handler); break;
+  case 16: zrleDecode16(r, is, &zis, (rdr::U16*)buf, handler); break;
+  case 32:
+    {
+      const rfb::PixelFormat& pf = handler->cp.pf();
+      bool fitsInLS3Bytes = ((pf.redMax   << pf.redShift)   < (1<<24) &&
+                             (pf.greenMax << pf.greenShift) < (1<<24) &&
+                             (pf.blueMax  << pf.blueShift)  < (1<<24));
+
+      bool fitsInMS3Bytes = (pf.redShift   > 7  &&
+                             pf.greenShift > 7  &&
+                             pf.blueShift  > 7);
+
+      if ((fitsInLS3Bytes && !pf.bigEndian) ||
+          (fitsInMS3Bytes && pf.bigEndian))
+      {
+        zrleDecode24A(r, is, &zis, (rdr::U32*)buf, handler);
+      }
+      else if ((fitsInLS3Bytes && pf.bigEndian) ||
+               (fitsInMS3Bytes && !pf.bigEndian))
+      {
+        zrleDecode24B(r, is, &zis, (rdr::U32*)buf, handler);
+      }
+      else
+      {
+        zrleDecode32(r, is, &zis, (rdr::U32*)buf, handler);
+      }
+      break;
+    }
+  }
+}
diff --git a/common/rfb/ZRLEDecoder.h b/common/rfb/ZRLEDecoder.h
new file mode 100644
index 00000000..fe96c737
--- /dev/null
+++ b/common/rfb/ZRLEDecoder.h
@@ -0,0 +1,37 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_ZRLEDECODER_H__
+#define __RFB_ZRLEDECODER_H__
+
+#include <rdr/ZlibInStream.h>
+#include <rfb/Decoder.h>
+
+namespace rfb {
+
+  class ZRLEDecoder : public Decoder {
+  public:
+    static Decoder* create(CMsgReader* reader);
+    virtual void readRect(const Rect& r, CMsgHandler* handler);
+    virtual ~ZRLEDecoder();
+  private:
+    ZRLEDecoder(CMsgReader* reader);
+    CMsgReader* reader;
+    rdr::ZlibInStream zis;
+  };
+}
+#endif
diff --git a/common/rfb/ZRLEEncoder.cxx b/common/rfb/ZRLEEncoder.cxx
new file mode 100644
index 00000000..d84c4cfb
--- /dev/null
+++ b/common/rfb/ZRLEEncoder.cxx
@@ -0,0 +1,122 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/OutStream.h>
+#include <rfb/Exception.h>
+#include <rfb/ImageGetter.h>
+#include <rfb/encodings.h>
+#include <rfb/ConnParams.h>
+#include <rfb/SMsgWriter.h>
+#include <rfb/ZRLEEncoder.h>
+#include <rfb/Configuration.h>
+
+using namespace rfb;
+
+rdr::MemOutStream* ZRLEEncoder::sharedMos = 0;
+int ZRLEEncoder::maxLen = 4097 * 1024; // enough for width 16384 32-bit pixels
+
+IntParameter zlibLevel("ZlibLevel","Zlib compression level",-1);
+
+#define EXTRA_ARGS ImageGetter* ig
+#define GET_IMAGE_INTO_BUF(r,buf) ig->getImage(buf, r);
+#define BPP 8
+#include <rfb/zrleEncode.h>
+#undef BPP
+#define BPP 16
+#include <rfb/zrleEncode.h>
+#undef BPP
+#define BPP 32
+#include <rfb/zrleEncode.h>
+#define CPIXEL 24A
+#include <rfb/zrleEncode.h>
+#undef CPIXEL
+#define CPIXEL 24B
+#include <rfb/zrleEncode.h>
+#undef CPIXEL
+#undef BPP
+
+Encoder* ZRLEEncoder::create(SMsgWriter* writer)
+{
+  return new ZRLEEncoder(writer);
+}
+
+ZRLEEncoder::ZRLEEncoder(SMsgWriter* writer_)
+  : writer(writer_), zos(0,0,zlibLevel)
+{
+  if (sharedMos)
+    mos = sharedMos;
+  else
+    mos = new rdr::MemOutStream(129*1024);
+}
+
+ZRLEEncoder::~ZRLEEncoder()
+{
+  if (!sharedMos)
+    delete mos;
+}
+
+bool ZRLEEncoder::writeRect(const Rect& r, ImageGetter* ig, Rect* actual)
+{
+  rdr::U8* imageBuf = writer->getImageBuf(64 * 64 * 4 + 4);
+  mos->clear();
+  bool wroteAll = true;
+  *actual = r;
+
+  switch (writer->bpp()) {
+  case 8:
+    wroteAll = zrleEncode8(r, mos, &zos, imageBuf, maxLen, actual, ig);
+    break;
+  case 16:
+    wroteAll = zrleEncode16(r, mos, &zos, imageBuf, maxLen, actual, ig);
+    break;
+  case 32:
+    {
+      const PixelFormat& pf = writer->getConnParams()->pf();
+
+      bool fitsInLS3Bytes = ((pf.redMax   << pf.redShift)   < (1<<24) &&
+                             (pf.greenMax << pf.greenShift) < (1<<24) &&
+                             (pf.blueMax  << pf.blueShift)  < (1<<24));
+
+      bool fitsInMS3Bytes = (pf.redShift   > 7  &&
+                             pf.greenShift > 7  &&
+                             pf.blueShift  > 7);
+
+      if ((fitsInLS3Bytes && !pf.bigEndian) ||
+          (fitsInMS3Bytes && pf.bigEndian))
+      {
+        wroteAll = zrleEncode24A(r, mos, &zos, imageBuf, maxLen, actual, ig);
+      }
+      else if ((fitsInLS3Bytes && pf.bigEndian) ||
+               (fitsInMS3Bytes && !pf.bigEndian))
+      {
+        wroteAll = zrleEncode24B(r, mos, &zos, imageBuf, maxLen, actual, ig);
+      }
+      else
+      {
+        wroteAll = zrleEncode32(r, mos, &zos, imageBuf, maxLen, actual, ig);
+      }
+      break;
+    }
+  }
+
+  writer->startRect(*actual, encodingZRLE);
+  rdr::OutStream* os = writer->getOutStream();
+  os->writeU32(mos->length());
+  os->writeBytes(mos->data(), mos->length());
+  writer->endRect();
+  return wroteAll;
+}
diff --git a/common/rfb/ZRLEEncoder.h b/common/rfb/ZRLEEncoder.h
new file mode 100644
index 00000000..7768917d
--- /dev/null
+++ b/common/rfb/ZRLEEncoder.h
@@ -0,0 +1,54 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_ZRLEENCODER_H__
+#define __RFB_ZRLEENCODER_H__
+
+#include <rdr/MemOutStream.h>
+#include <rdr/ZlibOutStream.h>
+#include <rfb/Encoder.h>
+
+namespace rfb {
+
+  class ZRLEEncoder : public Encoder {
+  public:
+    static Encoder* create(SMsgWriter* writer);
+    virtual bool writeRect(const Rect& r, ImageGetter* ig, Rect* actual);
+    virtual ~ZRLEEncoder();
+
+    // setMaxLen() sets the maximum size in bytes of any ZRLE rectangle.  This
+    // can be used to stop the MemOutStream from growing too large.  The value
+    // must be large enough to allow for at least one row of ZRLE tiles.  So
+    // for example for a screen width of 2048 32-bit pixels this is 2K*4*64 =
+    // 512Kbytes plus a bit of overhead (the overhead is about 1/16 of the
+    // width, in this example about 128 bytes).
+    static void setMaxLen(int m) { maxLen = m; }
+
+    // setSharedMos() sets a MemOutStream to be shared amongst all
+    // ZRLEEncoders.  Should be called before any ZRLEEncoders are created.
+    static void setSharedMos(rdr::MemOutStream* mos_) { sharedMos = mos_; }
+
+  private:
+    ZRLEEncoder(SMsgWriter* writer);
+    SMsgWriter* writer;
+    rdr::ZlibOutStream zos;
+    rdr::MemOutStream* mos;
+    static rdr::MemOutStream* sharedMos;
+    static int maxLen;
+  };
+}
+#endif
diff --git a/common/rfb/d3des.c b/common/rfb/d3des.c
new file mode 100644
index 00000000..eaca5816
--- /dev/null
+++ b/common/rfb/d3des.c
@@ -0,0 +1,434 @@
+/*
+ * This is D3DES (V5.09) by Richard Outerbridge with the double and
+ * triple-length support removed for use in VNC.  Also the bytebit[] array
+ * has been reversed so that the most significant bit in each byte of the
+ * key is ignored, not the least significant.
+ *
+ * These changes are:
+ *  Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* D3DES (V5.09) -
+ *
+ * A portable, public domain, version of the Data Encryption Standard.
+ *
+ * Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge.
+ * Thanks to: Dan Hoey for his excellent Initial and Inverse permutation
+ * code;  Jim Gillogly & Phil Karn for the DES key schedule code; Dennis
+ * Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau,
+ * for humouring me on.
+ *
+ * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge.
+ * (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992.
+ */
+
+#include "d3des.h"
+
+static void scrunch(unsigned char *, unsigned long *);
+static void unscrun(unsigned long *, unsigned char *);
+static void desfunc(unsigned long *, unsigned long *);
+static void cookey(unsigned long *);
+
+static unsigned long KnL[32] = { 0L };
+
+static unsigned short bytebit[8]	= {
+	01, 02, 04, 010, 020, 040, 0100, 0200 };
+
+static unsigned long bigbyte[24] = {
+	0x800000L,	0x400000L,	0x200000L,	0x100000L,
+	0x80000L,	0x40000L,	0x20000L,	0x10000L,
+	0x8000L,	0x4000L,	0x2000L,	0x1000L,
+	0x800L, 	0x400L, 	0x200L, 	0x100L,
+	0x80L,		0x40L,		0x20L,		0x10L,
+	0x8L,		0x4L,		0x2L,		0x1L	};
+
+/* Use the key schedule specified in the Standard (ANSI X3.92-1981). */
+
+static unsigned char pc1[56] = {
+	56, 48, 40, 32, 24, 16,  8,	 0, 57, 49, 41, 33, 25, 17,
+	 9,  1, 58, 50, 42, 34, 26,	18, 10,  2, 59, 51, 43, 35,
+	62, 54, 46, 38, 30, 22, 14,	 6, 61, 53, 45, 37, 29, 21,
+	13,  5, 60, 52, 44, 36, 28,	20, 12,  4, 27, 19, 11,  3 };
+
+static unsigned char totrot[16] = {
+	1,2,4,6,8,10,12,14,15,17,19,21,23,25,27,28 };
+
+static unsigned char pc2[48] = {
+	13, 16, 10, 23,  0,  4,  2, 27, 14,  5, 20,  9,
+	22, 18, 11,  3, 25,  7, 15,  6, 26, 19, 12,  1,
+	40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
+	43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31 };
+
+void deskey(key, edf)	/* Thanks to James Gillogly & Phil Karn! */
+unsigned char *key;
+int edf;
+{
+	register int i, j, l, m, n;
+	unsigned char pc1m[56], pcr[56];
+	unsigned long kn[32];
+
+	for ( j = 0; j < 56; j++ ) {
+		l = pc1[j];
+		m = l & 07;
+		pc1m[j] = (key[l >> 3] & bytebit[m]) ? 1 : 0;
+		}
+	for( i = 0; i < 16; i++ ) {
+		if( edf == DE1 ) m = (15 - i) << 1;
+		else m = i << 1;
+		n = m + 1;
+		kn[m] = kn[n] = 0L;
+		for( j = 0; j < 28; j++ ) {
+			l = j + totrot[i];
+			if( l < 28 ) pcr[j] = pc1m[l];
+			else pcr[j] = pc1m[l - 28];
+			}
+		for( j = 28; j < 56; j++ ) {
+		    l = j + totrot[i];
+		    if( l < 56 ) pcr[j] = pc1m[l];
+		    else pcr[j] = pc1m[l - 28];
+		    }
+		for( j = 0; j < 24; j++ ) {
+			if( pcr[pc2[j]] ) kn[m] |= bigbyte[j];
+			if( pcr[pc2[j+24]] ) kn[n] |= bigbyte[j];
+			}
+		}
+	cookey(kn);
+	return;
+	}
+
+static void cookey(raw1)
+register unsigned long *raw1;
+{
+	register unsigned long *cook, *raw0;
+	unsigned long dough[32];
+	register int i;
+
+	cook = dough;
+	for( i = 0; i < 16; i++, raw1++ ) {
+		raw0 = raw1++;
+		*cook	 = (*raw0 & 0x00fc0000L) << 6;
+		*cook	|= (*raw0 & 0x00000fc0L) << 10;
+		*cook	|= (*raw1 & 0x00fc0000L) >> 10;
+		*cook++ |= (*raw1 & 0x00000fc0L) >> 6;
+		*cook	 = (*raw0 & 0x0003f000L) << 12;
+		*cook	|= (*raw0 & 0x0000003fL) << 16;
+		*cook	|= (*raw1 & 0x0003f000L) >> 4;
+		*cook++ |= (*raw1 & 0x0000003fL);
+		}
+	usekey(dough);
+	return;
+	}
+
+void cpkey(into)
+register unsigned long *into;
+{
+	register unsigned long *from, *endp;
+
+	from = KnL, endp = &KnL[32];
+	while( from < endp ) *into++ = *from++;
+	return;
+	}
+
+void usekey(from)
+register unsigned long *from;
+{
+	register unsigned long *to, *endp;
+
+	to = KnL, endp = &KnL[32];
+	while( to < endp ) *to++ = *from++;
+	return;
+	}
+
+void des(inblock, outblock)
+unsigned char *inblock, *outblock;
+{
+	unsigned long work[2];
+
+	scrunch(inblock, work);
+	desfunc(work, KnL);
+	unscrun(work, outblock);
+	return;
+	}
+
+static void scrunch(outof, into)
+register unsigned char *outof;
+register unsigned long *into;
+{
+	*into	 = (*outof++ & 0xffL) << 24;
+	*into	|= (*outof++ & 0xffL) << 16;
+	*into	|= (*outof++ & 0xffL) << 8;
+	*into++ |= (*outof++ & 0xffL);
+	*into	 = (*outof++ & 0xffL) << 24;
+	*into	|= (*outof++ & 0xffL) << 16;
+	*into	|= (*outof++ & 0xffL) << 8;
+	*into	|= (*outof   & 0xffL);
+	return;
+	}
+
+static void unscrun(outof, into)
+register unsigned long *outof;
+register unsigned char *into;
+{
+	*into++ = (unsigned char)((*outof >> 24) & 0xffL);
+	*into++ = (unsigned char)((*outof >> 16) & 0xffL);
+	*into++ = (unsigned char)((*outof >>  8) & 0xffL);
+	*into++ = (unsigned char)(*outof++	 & 0xffL);
+	*into++ = (unsigned char)((*outof >> 24) & 0xffL);
+	*into++ = (unsigned char)((*outof >> 16) & 0xffL);
+	*into++ = (unsigned char)((*outof >>  8) & 0xffL);
+	*into	=  (unsigned char)(*outof	 & 0xffL);
+	return;
+	}
+
+static unsigned long SP1[64] = {
+	0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L,
+	0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L,
+	0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L,
+	0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L,
+	0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L,
+	0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L,
+	0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L,
+	0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L,
+	0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L,
+	0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L,
+	0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L,
+	0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L,
+	0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L,
+	0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L,
+	0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L,
+	0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L };
+
+static unsigned long SP2[64] = {
+	0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L,
+	0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L,
+	0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L,
+	0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L,
+	0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L,
+	0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L,
+	0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L,
+	0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L,
+	0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L,
+	0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L,
+	0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L,
+	0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L,
+	0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L,
+	0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L,
+	0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L,
+	0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L };
+
+static unsigned long SP3[64] = {
+	0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L,
+	0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L,
+	0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L,
+	0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L,
+	0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L,
+	0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L,
+	0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L,
+	0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L,
+	0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L,
+	0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L,
+	0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L,
+	0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L,
+	0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L,
+	0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L,
+	0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L,
+	0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L };
+
+static unsigned long SP4[64] = {
+	0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
+	0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L,
+	0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L,
+	0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L,
+	0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L,
+	0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L,
+	0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L,
+	0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L,
+	0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L,
+	0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L,
+	0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L,
+	0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
+	0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L,
+	0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L,
+	0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L,
+	0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L };
+
+static unsigned long SP5[64] = {
+	0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L,
+	0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L,
+	0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L,
+	0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L,
+	0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L,
+	0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L,
+	0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L,
+	0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L,
+	0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L,
+	0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L,
+	0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L,
+	0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L,
+	0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L,
+	0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L,
+	0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L,
+	0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L };
+
+static unsigned long SP6[64] = {
+	0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L,
+	0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L,
+	0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L,
+	0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L,
+	0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L,
+	0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L,
+	0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L,
+	0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L,
+	0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L,
+	0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L,
+	0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L,
+	0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L,
+	0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L,
+	0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L,
+	0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L,
+	0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L };
+
+static unsigned long SP7[64] = {
+	0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L,
+	0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L,
+	0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L,
+	0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L,
+	0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L,
+	0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L,
+	0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L,
+	0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L,
+	0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L,
+	0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L,
+	0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L,
+	0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L,
+	0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L,
+	0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L,
+	0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L,
+	0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L };
+
+static unsigned long SP8[64] = {
+	0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L,
+	0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L,
+	0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L,
+	0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L,
+	0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L,
+	0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L,
+	0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L,
+	0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L,
+	0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L,
+	0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L,
+	0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L,
+	0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L,
+	0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L,
+	0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L,
+	0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L,
+	0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L };
+
+static void desfunc(block, keys)
+register unsigned long *block, *keys;
+{
+	register unsigned long fval, work, right, leftt;
+	register int round;
+
+	leftt = block[0];
+	right = block[1];
+	work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL;
+	right ^= work;
+	leftt ^= (work << 4);
+	work = ((leftt >> 16) ^ right) & 0x0000ffffL;
+	right ^= work;
+	leftt ^= (work << 16);
+	work = ((right >> 2) ^ leftt) & 0x33333333L;
+	leftt ^= work;
+	right ^= (work << 2);
+	work = ((right >> 8) ^ leftt) & 0x00ff00ffL;
+	leftt ^= work;
+	right ^= (work << 8);
+	right = ((right << 1) | ((right >> 31) & 1L)) & 0xffffffffL;
+	work = (leftt ^ right) & 0xaaaaaaaaL;
+	leftt ^= work;
+	right ^= work;
+	leftt = ((leftt << 1) | ((leftt >> 31) & 1L)) & 0xffffffffL;
+
+	for( round = 0; round < 8; round++ ) {
+		work  = (right << 28) | (right >> 4);
+		work ^= *keys++;
+		fval  = SP7[ work		 & 0x3fL];
+		fval |= SP5[(work >>  8) & 0x3fL];
+		fval |= SP3[(work >> 16) & 0x3fL];
+		fval |= SP1[(work >> 24) & 0x3fL];
+		work  = right ^ *keys++;
+		fval |= SP8[ work		 & 0x3fL];
+		fval |= SP6[(work >>  8) & 0x3fL];
+		fval |= SP4[(work >> 16) & 0x3fL];
+		fval |= SP2[(work >> 24) & 0x3fL];
+		leftt ^= fval;
+		work  = (leftt << 28) | (leftt >> 4);
+		work ^= *keys++;
+		fval  = SP7[ work		 & 0x3fL];
+		fval |= SP5[(work >>  8) & 0x3fL];
+		fval |= SP3[(work >> 16) & 0x3fL];
+		fval |= SP1[(work >> 24) & 0x3fL];
+		work  = leftt ^ *keys++;
+		fval |= SP8[ work		 & 0x3fL];
+		fval |= SP6[(work >>  8) & 0x3fL];
+		fval |= SP4[(work >> 16) & 0x3fL];
+		fval |= SP2[(work >> 24) & 0x3fL];
+		right ^= fval;
+		}
+
+	right = (right << 31) | (right >> 1);
+	work = (leftt ^ right) & 0xaaaaaaaaL;
+	leftt ^= work;
+	right ^= work;
+	leftt = (leftt << 31) | (leftt >> 1);
+	work = ((leftt >> 8) ^ right) & 0x00ff00ffL;
+	right ^= work;
+	leftt ^= (work << 8);
+	work = ((leftt >> 2) ^ right) & 0x33333333L;
+	right ^= work;
+	leftt ^= (work << 2);
+	work = ((right >> 16) ^ leftt) & 0x0000ffffL;
+	leftt ^= work;
+	right ^= (work << 16);
+	work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL;
+	leftt ^= work;
+	right ^= (work << 4);
+	*block++ = right;
+	*block = leftt;
+	return;
+	}
+
+/* Validation sets:
+ *
+ * Single-length key, single-length plaintext -
+ * Key	  : 0123 4567 89ab cdef
+ * Plain  : 0123 4567 89ab cde7
+ * Cipher : c957 4425 6a5e d31d
+ *
+ * Double-length key, single-length plaintext -
+ * Key	  : 0123 4567 89ab cdef fedc ba98 7654 3210
+ * Plain  : 0123 4567 89ab cde7
+ * Cipher : 7f1d 0a77 826b 8aff
+ *
+ * Double-length key, double-length plaintext -
+ * Key	  : 0123 4567 89ab cdef fedc ba98 7654 3210
+ * Plain  : 0123 4567 89ab cdef 0123 4567 89ab cdff
+ * Cipher : 27a0 8440 406a df60 278f 47cf 42d6 15d7
+ *
+ * Triple-length key, single-length plaintext -
+ * Key	  : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567
+ * Plain  : 0123 4567 89ab cde7
+ * Cipher : de0b 7c06 ae5e 0ed5
+ *
+ * Triple-length key, double-length plaintext -
+ * Key	  : 0123 4567 89ab cdef fedc ba98 7654 3210 89ab cdef 0123 4567
+ * Plain  : 0123 4567 89ab cdef 0123 4567 89ab cdff
+ * Cipher : ad0d 1b30 ac17 cf07 0ed1 1c63 81e4 4de5
+ *
+ * d3des V5.0a rwo 9208.07 18:44 Graven Imagery
+ **********************************************************************/
diff --git a/common/rfb/d3des.h b/common/rfb/d3des.h
new file mode 100644
index 00000000..ea3da44c
--- /dev/null
+++ b/common/rfb/d3des.h
@@ -0,0 +1,51 @@
+/*
+ * This is D3DES (V5.09) by Richard Outerbridge with the double and
+ * triple-length support removed for use in VNC.
+ *
+ * These changes are:
+ *  Copyright (C) 1999 AT&T Laboratories Cambridge.  All Rights Reserved.
+ *
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* d3des.h -
+ *
+ *	Headers and defines for d3des.c
+ *	Graven Imagery, 1992.
+ *
+ * Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge
+ *	(GEnie : OUTER; CIS : [71755,204])
+ */
+
+#define EN0	0	/* MODE == encrypt */
+#define DE1	1	/* MODE == decrypt */
+
+extern void deskey(unsigned char *, int);
+/*		      hexkey[8]     MODE
+ * Sets the internal key register according to the hexadecimal
+ * key contained in the 8 bytes of hexkey, according to the DES,
+ * for encryption or decryption according to MODE.
+ */
+
+extern void usekey(unsigned long *);
+/*		    cookedkey[32]
+ * Loads the internal key register with the data in cookedkey.
+ */
+
+extern void cpkey(unsigned long *);
+/*		   cookedkey[32]
+ * Copies the contents of the internal key register into the storage
+ * located at &cookedkey[0].
+ */
+
+extern void des(unsigned char *, unsigned char *);
+/*		    from[8]	      to[8]
+ * Encrypts/Decrypts (according to the key currently loaded in the
+ * internal key register) one block of eight bytes at address 'from'
+ * into the block at address 'to'.  They can be the same.
+ */
+
+/* d3des.h V5.09 rwo 9208.04 15:06 Graven Imagery
+ ********************************************************************/
diff --git a/common/rfb/encodings.cxx b/common/rfb/encodings.cxx
new file mode 100644
index 00000000..6aa81c4f
--- /dev/null
+++ b/common/rfb/encodings.cxx
@@ -0,0 +1,49 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <string.h>
+#ifdef _WIN32
+#define strcasecmp _stricmp
+#endif
+#include <rfb/encodings.h>
+#include <rfb/util.h>
+
+int rfb::encodingNum(const char* name)
+{
+  if (strcasecmp(name, "raw") == 0)      return encodingRaw;
+  if (strcasecmp(name, "copyRect") == 0) return encodingCopyRect;
+  if (strcasecmp(name, "RRE") == 0)      return encodingRRE;
+  if (strcasecmp(name, "CoRRE") == 0)    return encodingCoRRE;
+  if (strcasecmp(name, "hextile") == 0)  return encodingHextile;
+  if (strcasecmp(name, "ZRLE") == 0)     return encodingZRLE;
+  if (strcasecmp(name, "Tight") == 0)    return encodingTight;
+  return -1;
+}
+
+const char* rfb::encodingName(unsigned int num)
+{
+  switch (num) {
+  case encodingRaw:      return "raw";
+  case encodingCopyRect: return "copyRect";
+  case encodingRRE:      return "RRE";
+  case encodingCoRRE:    return "CoRRE";
+  case encodingHextile:  return "hextile";
+  case encodingZRLE:     return "ZRLE";
+  case encodingTight:    return "Tight";
+  default:               return "[unknown encoding]";
+  }
+}
diff --git a/common/rfb/encodings.h b/common/rfb/encodings.h
new file mode 100644
index 00000000..51f6f1ec
--- /dev/null
+++ b/common/rfb/encodings.h
@@ -0,0 +1,47 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_ENCODINGS_H__
+#define __RFB_ENCODINGS_H__
+
+namespace rfb {
+
+  const unsigned int encodingRaw = 0;
+  const unsigned int encodingCopyRect = 1;
+  const unsigned int encodingRRE = 2;
+  const unsigned int encodingCoRRE = 4;
+  const unsigned int encodingHextile = 5;
+  const unsigned int encodingTight = 7;
+  const unsigned int encodingZRLE = 16;
+
+  const unsigned int encodingMax = 255;
+
+  const unsigned int pseudoEncodingXCursor = 0xffffff10;
+  const unsigned int pseudoEncodingCursor = 0xffffff11;
+  const unsigned int pseudoEncodingDesktopSize = 0xffffff21;
+
+  // TightVNC-specific
+  const unsigned int pseudoEncodingLastRect = 0xFFFFFF20;
+  const unsigned int pseudoEncodingQualityLevel0 = 0xFFFFFFE0;
+  const unsigned int pseudoEncodingQualityLevel9 = 0xFFFFFFE9;
+  const unsigned int pseudoEncodingCompressLevel0 = 0xFFFFFF00;
+  const unsigned int pseudoEncodingCompressLevel9 = 0xFFFFFF09;
+
+  int encodingNum(const char* name);
+  const char* encodingName(unsigned int num);
+}
+#endif
diff --git a/common/rfb/fttypes.h b/common/rfb/fttypes.h
new file mode 100644
index 00000000..4404508c
--- /dev/null
+++ b/common/rfb/fttypes.h
@@ -0,0 +1,92 @@
+/* Copyright (C) 2005 TightVNC Team.  All Rights Reserved.
+ *
+ * Developed by Dennis Syrovatsky.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// -=- fttypes.h
+
+#ifndef __RFB_FTTYPES_H__
+#define __RFB_FTTYPES_H__
+
+#include "stdio.h"
+#include "stdlib.h"
+#include "string.h"
+
+#define FT_FILENAME_SIZE 256
+
+#define FT_MAX_STATUS_STRINGS		 255
+#define FT_MAX_LENGTH_STATUS_STRINGS 130
+
+#define FT_MAX_SENDING_SIZE 8192
+
+#define FT_NET_ATTR_DIR ((unsigned int)-1)
+
+#define FT_ATTR_UNKNOWN			    0x00000000
+#define FT_ATTR_FILE			    0x00000001
+#define FT_ATTR_DIR 			    0x00000002
+
+#define FT_ATTR_RESIZE_NEEDED	    0x00040000
+#define FT_ATTR_FOLDER_EXISTS	    0x00080000
+#define FT_ATTR_COPY_OVERWRITE	    0x00100000
+#define FT_ATTR_FLR_UPLOAD_CHECK	0x00200000
+#define FT_ATTR_FLR_UPLOAD_ADD	    0x00400000
+#define FT_ATTR_COPY_UPLOAD	        0x00800000
+#define FT_ATTR_FLR_DOWNLOAD_CHECK  0x01000000
+#define FT_ATTR_FLR_DOWNLOAD_ADD	0x02000000
+#define FT_ATTR_COPY_DOWNLOAD	    0x04000000
+#define FT_ATTR_DELETE_LOCAL	    0x08000000
+#define FT_ATTR_DELETE_REMOTE	    0x10000000
+#define FT_ATTR_RENAME_LOCAL	    0x20000000
+#define FT_ATTR_RENAME_REMOTE	    0x40000000
+
+#define FT_FLR_DEST_MAIN     101
+#define FT_FLR_DEST_BROWSE   102
+#define FT_FLR_DEST_DOWNLOAD 103
+#define FT_FLR_DEST_UPLOAD   104
+#define FT_FLR_DEST_DELETE   105
+#define FT_FLR_DEST_RENAME   106
+
+typedef struct tagSIZEDATAINFO
+{
+	unsigned int size;
+	unsigned int data;
+} SIZEDATAINFO;
+
+typedef struct tagSIZEDATAFLAGSINFO
+{
+	unsigned int size;
+	unsigned int data;
+	unsigned int flags;
+} SIZEDATAFLAGSINFO;
+
+typedef struct tagFILEINFO
+{
+	char name[FT_FILENAME_SIZE];
+	SIZEDATAFLAGSINFO info;
+} FILEINFO;
+
+typedef struct tagFILEINFOEX
+{
+	char locPath[FT_FILENAME_SIZE];
+	char locName[FT_FILENAME_SIZE];
+	char remPath[FT_FILENAME_SIZE];
+	char remName[FT_FILENAME_SIZE];
+	SIZEDATAFLAGSINFO info;
+} FILEINFOEX;
+
+#endif // __RFB_FTTYPES_H__
diff --git a/common/rfb/hextileConstants.h b/common/rfb/hextileConstants.h
new file mode 100644
index 00000000..b8713cb6
--- /dev/null
+++ b/common/rfb/hextileConstants.h
@@ -0,0 +1,27 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_HEXTILECONSTANTS_H__
+#define __RFB_HEXTILECONSTANTS_H__
+namespace rfb {
+  const int hextileRaw = (1 << 0);
+  const int hextileBgSpecified = (1 << 1);
+  const int hextileFgSpecified = (1 << 2);
+  const int hextileAnySubrects = (1 << 3);
+  const int hextileSubrectsColoured = (1 << 4);
+}
+#endif
diff --git a/common/rfb/hextileDecode.h b/common/rfb/hextileDecode.h
new file mode 100644
index 00000000..77befc7d
--- /dev/null
+++ b/common/rfb/hextileDecode.h
@@ -0,0 +1,126 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// Hextile decoding function.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+// EXTRA_ARGS         - optional extra arguments
+// FILL_RECT          - fill a rectangle with a single colour
+// IMAGE_RECT         - draw a rectangle of pixel data from a buffer
+
+#include <rdr/InStream.h>
+#include <rfb/hextileConstants.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define READ_PIXEL CONCAT2E(readOpaque,BPP)
+#define HEXTILE_DECODE CONCAT2E(hextileDecode,BPP)
+
+void HEXTILE_DECODE (const Rect& r, rdr::InStream* is, PIXEL_T* buf
+#ifdef EXTRA_ARGS
+                     , EXTRA_ARGS
+#endif
+                     )
+{
+  Rect t;
+  PIXEL_T bg = 0;
+  PIXEL_T fg = 0;
+
+  for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 16) {
+
+    t.br.y = __rfbmin(r.br.y, t.tl.y + 16);
+
+    for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 16) {
+
+      t.br.x = __rfbmin(r.br.x, t.tl.x + 16);
+
+      int tileType = is->readU8();
+
+      if (tileType & hextileRaw) {
+	is->readBytes(buf, t.area() * (BPP/8));
+	IMAGE_RECT(t, buf);
+	continue;
+      }
+
+      if (tileType & hextileBgSpecified)
+	bg = is->READ_PIXEL();
+
+#ifdef FAVOUR_FILL_RECT
+      FILL_RECT(t, bg);
+#else
+      int len = t.area();
+      PIXEL_T* ptr = (PIXEL_T*)buf;
+      while (len-- > 0) *ptr++ = bg;
+#endif
+
+      if (tileType & hextileFgSpecified)
+	fg = is->READ_PIXEL();
+
+      if (tileType & hextileAnySubrects) {
+        int nSubrects = is->readU8();
+
+        for (int i = 0; i < nSubrects; i++) {
+
+          if (tileType & hextileSubrectsColoured)
+            fg = is->READ_PIXEL();
+
+          int xy = is->readU8();
+          int wh = is->readU8();
+
+#ifdef FAVOUR_FILL_RECT
+          Rect s;
+          s.tl.x = t.tl.x + ((xy >> 4) & 15);
+          s.tl.y = t.tl.y + (xy & 15);
+          s.br.x = s.tl.x + ((wh >> 4) & 15) + 1;
+          s.br.y = s.tl.y + (wh & 15) + 1;
+          FILL_RECT(s, fg);
+#else
+          int x = ((xy >> 4) & 15);
+          int y = (xy & 15);
+          int w = ((wh >> 4) & 15) + 1;
+          int h = (wh & 15) + 1;
+          PIXEL_T* ptr = (PIXEL_T*)buf + y * t.width() + x;
+          int rowAdd = t.width() - w;
+          while (h-- > 0) {
+            int len = w;
+            while (len-- > 0) *ptr++ = fg;
+            ptr += rowAdd;
+          }
+#endif
+        }
+      }
+#ifndef FAVOUR_FILL_RECT
+      IMAGE_RECT(t, buf);
+#endif
+    }
+  }
+}
+
+#undef PIXEL_T
+#undef READ_PIXEL
+#undef HEXTILE_DECODE
+}
diff --git a/common/rfb/hextileEncode.h b/common/rfb/hextileEncode.h
new file mode 100644
index 00000000..9f8bd558
--- /dev/null
+++ b/common/rfb/hextileEncode.h
@@ -0,0 +1,229 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * Copyright (C) 2005 Constantin Kaplinsky.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// Hextile encoding function.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+// EXTRA_ARGS         - optional extra arguments
+// GET_IMAGE_INTO_BUF - gets a rectangle of pixel data into a buffer
+
+#include <rdr/OutStream.h>
+#include <rfb/hextileConstants.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define WRITE_PIXEL CONCAT2E(writeOpaque,BPP)
+#define HEXTILE_ENCODE CONCAT2E(hextileEncode,BPP)
+#define HEXTILE_ENCODE_TILE CONCAT2E(hextileEncodeTile,BPP)
+#define TEST_TILE_TYPE CONCAT2E(hextileTestTileType,BPP)
+
+int TEST_TILE_TYPE (PIXEL_T* data, int w, int h, PIXEL_T* bg, PIXEL_T* fg);
+int HEXTILE_ENCODE_TILE (PIXEL_T* data, int w, int h, int tileType,
+                         rdr::U8* encoded, PIXEL_T bg);
+
+void HEXTILE_ENCODE(const Rect& r, rdr::OutStream* os
+#ifdef EXTRA_ARGS
+                    , EXTRA_ARGS
+#endif
+                    )
+{
+  Rect t;
+  PIXEL_T buf[256];
+  PIXEL_T oldBg = 0, oldFg = 0;
+  bool oldBgValid = false;
+  bool oldFgValid = false;
+  rdr::U8 encoded[256*(BPP/8)];
+
+  for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 16) {
+
+    t.br.y = __rfbmin(r.br.y, t.tl.y + 16);
+
+    for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 16) {
+
+      t.br.x = __rfbmin(r.br.x, t.tl.x + 16);
+
+      GET_IMAGE_INTO_BUF(t,buf);
+
+      PIXEL_T bg, fg;
+      int tileType = TEST_TILE_TYPE(buf, t.width(), t.height(), &bg, &fg);
+
+      if (!oldBgValid || oldBg != bg) {
+        tileType |= hextileBgSpecified;
+        oldBg = bg;
+        oldBgValid = true;
+      }
+
+      int encodedLen = 0;
+
+      if (tileType & hextileAnySubrects) {
+
+        if (tileType & hextileSubrectsColoured) {
+          oldFgValid = false;
+        } else {
+          if (!oldFgValid || oldFg != fg) {
+            tileType |= hextileFgSpecified;
+            oldFg = fg;
+            oldFgValid = true;
+          }
+        }
+
+        encodedLen = HEXTILE_ENCODE_TILE(buf, t.width(), t.height(), tileType,
+                                         encoded, bg);
+
+        if (encodedLen < 0) {
+          GET_IMAGE_INTO_BUF(t,buf);
+          os->writeU8(hextileRaw);
+          os->writeBytes(buf, t.width() * t.height() * (BPP/8));
+          oldBgValid = oldFgValid = false;
+          continue;
+        }
+      }
+
+      os->writeU8(tileType);
+      if (tileType & hextileBgSpecified) os->WRITE_PIXEL(bg);
+      if (tileType & hextileFgSpecified) os->WRITE_PIXEL(fg);
+      if (tileType & hextileAnySubrects) os->writeBytes(encoded, encodedLen);
+    }
+  }
+}
+
+
+int HEXTILE_ENCODE_TILE (PIXEL_T* data, int w, int h, int tileType,
+                         rdr::U8* encoded, PIXEL_T bg)
+{
+  rdr::U8* nSubrectsPtr = encoded;
+  *nSubrectsPtr = 0;
+  encoded++;
+
+  for (int y = 0; y < h; y++)
+  {
+    int x = 0;
+    while (x < w) {
+      if (*data == bg) {
+        x++;
+        data++;
+        continue;
+      }
+
+      // Find horizontal subrect first
+      PIXEL_T* ptr = data+1;
+      PIXEL_T* eol = data+w-x;
+      while (ptr < eol && *ptr == *data) ptr++;
+      int sw = ptr - data;
+
+      ptr = data + w;
+      int sh = 1;
+      while (sh < h-y) {
+        eol = ptr + sw;
+        while (ptr < eol)
+          if (*ptr++ != *data) goto endOfSubrect;
+        ptr += w - sw;
+        sh++;
+      }
+    endOfSubrect:
+
+      (*nSubrectsPtr)++;
+
+      if (tileType & hextileSubrectsColoured) {
+        if (encoded - nSubrectsPtr + (BPP/8) > w*h*(BPP/8)) return -1;
+#if (BPP == 8)
+        *encoded++ = *data;
+#elif (BPP == 16)
+        *encoded++ = ((rdr::U8*)data)[0];
+        *encoded++ = ((rdr::U8*)data)[1];
+#elif (BPP == 32)
+        *encoded++ = ((rdr::U8*)data)[0];
+        *encoded++ = ((rdr::U8*)data)[1];
+        *encoded++ = ((rdr::U8*)data)[2];
+        *encoded++ = ((rdr::U8*)data)[3];
+#endif
+      }
+
+      if (encoded - nSubrectsPtr + 2 > w*h*(BPP/8)) return -1;
+      *encoded++ = (x << 4) | y;
+      *encoded++ = ((sw-1) << 4) | (sh-1);
+
+      ptr = data+w;
+      PIXEL_T* eor = data+w*sh;
+      while (ptr < eor) {
+        eol = ptr + sw;
+        while (ptr < eol) *ptr++ = bg;
+        ptr += w - sw;
+      }
+      x += sw;
+      data += sw;
+    }
+  }
+  return encoded - nSubrectsPtr;
+}
+
+
+int TEST_TILE_TYPE (PIXEL_T* data, int w, int h, PIXEL_T* bg, PIXEL_T* fg)
+{
+  PIXEL_T pix1 = *data;
+  PIXEL_T* end = data + w * h;
+
+  PIXEL_T* ptr = data + 1;
+  while (ptr < end && *ptr == pix1)
+    ptr++;
+
+  if (ptr == end) {
+    *bg = pix1;
+    return 0;                   // solid-color tile
+  }
+
+  int count1 = ptr - data;
+  int count2 = 1;
+  PIXEL_T pix2 = *ptr++;
+  int tileType = hextileAnySubrects;
+
+  for (; ptr < end; ptr++) {
+    if (*ptr == pix1) {
+      count1++;
+    } else if (*ptr == pix2) {
+      count2++;
+    } else {
+      tileType |= hextileSubrectsColoured;
+      break;
+    }
+  }
+
+  if (count1 >= count2) {
+    *bg = pix1; *fg = pix2;
+  } else {
+    *bg = pix2; *fg = pix1;
+  }
+  return tileType;
+}
+
+#undef PIXEL_T
+#undef WRITE_PIXEL
+#undef HEXTILE_ENCODE
+#undef HEXTILE_ENCODE_TILE
+#undef TEST_TILE_TYPE
+}
diff --git a/common/rfb/hextileEncodeBetter.h b/common/rfb/hextileEncodeBetter.h
new file mode 100644
index 00000000..2b6b160a
--- /dev/null
+++ b/common/rfb/hextileEncodeBetter.h
@@ -0,0 +1,352 @@
+/* Copyright (C) 2002-2003 RealVNC Ltd.  All Rights Reserved.
+ * Copyright (C) 2005 Constantin Kaplinsky.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// Hextile encoding function.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+// EXTRA_ARGS         - optional extra arguments
+// GET_IMAGE_INTO_BUF - gets a rectangle of pixel data into a buffer
+
+#include <rdr/OutStream.h>
+#include <rfb/hextileConstants.h>
+#include <rfb/TightPalette.h>
+
+#include <assert.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define WRITE_PIXEL CONCAT2E(writeOpaque,BPP)
+#define HEXTILE_TILE CONCAT2E(HextileTile,BPP)
+#define HEXTILE_ENCODE CONCAT2E(hextileEncodeBetter,BPP)
+
+//
+// This class analyzes a separate tile and encodes its subrectangles.
+//
+
+class HEXTILE_TILE {
+
+ public:
+
+  HEXTILE_TILE ();
+
+  //
+  // Initialize existing object instance with new tile data.
+  //
+  void newTile(const PIXEL_T *src, int w, int h);
+
+  //
+  // Flags can include: hextileRaw, hextileAnySubrects and
+  // hextileSubrectsColoured. Note that if hextileRaw is set, other
+  // flags make no sense. Also, hextileSubrectsColoured is meaningful
+  // only when hextileAnySubrects is set as well.
+  //
+  int getFlags() const { return m_flags; }
+
+  //
+  // Returns the size of encoded subrects data, including subrect count.
+  // The size is zero if flags do not include hextileAnySubrects.
+  //
+  int getSize() const { return m_size; }
+
+  //
+  // Return optimal background.
+  //
+  int getBackground() const { return m_background; }
+
+  //
+  // Return foreground if flags include hextileSubrectsColoured.
+  //
+  int getForeground() const { return m_foreground; }
+
+  //
+  // Encode subrects. This function may be called only if
+  // hextileAnySubrects bit is set in flags. The buffer size should be
+  // big enough to store at least the number of bytes returned by the
+  // getSize() method.
+  //
+  void encode(rdr::U8* dst) const;
+
+ protected:
+
+  //
+  // Analyze the tile pixels, fill in all the data fields.
+  //
+  void analyze();
+
+  const PIXEL_T *m_tile;
+  int m_width;
+  int m_height;
+
+  int m_size;
+  int m_flags;
+  PIXEL_T m_background;
+  PIXEL_T m_foreground;
+
+  int m_numSubrects;
+  rdr::U8 m_coords[256 * 2];
+  PIXEL_T m_colors[256];
+
+ private:
+
+  bool m_processed[16][16];
+  TightPalette m_pal;
+};
+
+HEXTILE_TILE::HEXTILE_TILE()
+  : m_tile(NULL), m_width(0), m_height(0),
+    m_size(0), m_flags(0), m_background(0), m_foreground(0),
+    m_numSubrects(0), m_pal(48 + 2 * BPP)
+{
+}
+
+void HEXTILE_TILE::newTile(const PIXEL_T *src, int w, int h)
+{
+  m_tile = src;
+  m_width = w;
+  m_height = h;
+
+  analyze();
+}
+
+void HEXTILE_TILE::analyze()
+{
+  assert(m_tile && m_width && m_height);
+
+  const PIXEL_T *ptr = m_tile;
+  const PIXEL_T *end = &m_tile[m_width * m_height];
+  PIXEL_T color = *ptr++;
+  while (ptr != end && *ptr == color)
+    ptr++;
+
+  // Handle solid tile
+  if (ptr == end) {
+    m_background = m_tile[0];
+    m_flags = 0;
+    m_size = 0;
+    return;
+  }
+
+  // Compute number of complete rows of the same color, at the top
+  int y = (ptr - m_tile) / m_width;
+
+  PIXEL_T *colorsPtr = m_colors;
+  rdr::U8 *coordsPtr = m_coords;
+  m_pal.reset();
+  m_numSubrects = 0;
+
+  // Have we found the first subrect already?
+  if (y > 0) {
+    *colorsPtr++ = color;
+    *coordsPtr++ = 0;
+    *coordsPtr++ = (rdr::U8)(((m_width - 1) << 4) | ((y - 1) & 0x0F));
+    m_pal.insert(color, 1);
+    m_numSubrects++;
+  }
+
+  memset(m_processed, 0, 16 * 16 * sizeof(bool));
+
+  int x, sx, sy, sw, sh, max_x;
+
+  for (; y < m_height; y++) {
+    for (x = 0; x < m_width; x++) {
+      // Skip pixels that were processed earlier
+      if (m_processed[y][x]) {
+        continue;
+      }
+      // Determine dimensions of the horizontal subrect
+      color = m_tile[y * m_width + x];
+      for (sx = x + 1; sx < m_width; sx++) {
+        if (m_tile[y * m_width + sx] != color)
+          break;
+      }
+      sw = sx - x;
+      max_x = sx;
+      for (sy = y + 1; sy < m_height; sy++) {
+        for (sx = x; sx < max_x; sx++) {
+          if (m_tile[sy * m_width + sx] != color)
+            goto done;
+        }
+      }
+    done:
+      sh = sy - y;
+
+      // Save properties of this subrect
+      *colorsPtr++ = color;
+      *coordsPtr++ = (rdr::U8)((x << 4) | (y & 0x0F));
+      *coordsPtr++ = (rdr::U8)(((sw - 1) << 4) | ((sh - 1) & 0x0F));
+
+      if (m_pal.insert(color, 1) == 0) {
+        // Handle palette overflow
+        m_flags = hextileRaw;
+        m_size = 0;
+        return;
+      }
+
+      m_numSubrects++;
+
+      // Mark pixels of this subrect as processed, below this row
+      for (sy = y + 1; sy < y + sh; sy++) {
+        for (sx = x; sx < x + sw; sx++)
+          m_processed[sy][sx] = true;
+      }
+
+      // Skip processed pixels of this row
+      x += (sw - 1);
+    }
+  }
+
+  // Save number of colors in this tile (should be no less than 2)
+  int numColors = m_pal.getNumColors();
+  assert(numColors >= 2);
+
+  m_background = (PIXEL_T)m_pal.getEntry(0);
+  m_flags = hextileAnySubrects;
+  int numSubrects = m_numSubrects - m_pal.getCount(0);
+
+  if (numColors == 2) {
+    // Monochrome tile
+    m_foreground = (PIXEL_T)m_pal.getEntry(1);
+    m_size = 1 + 2 * numSubrects;
+  } else {
+    // Colored tile
+    m_flags |= hextileSubrectsColoured;
+    m_size = 1 + (2 + (BPP/8)) * numSubrects;
+  }
+}
+
+void HEXTILE_TILE::encode(rdr::U8 *dst) const
+{
+  assert(m_numSubrects && (m_flags & hextileAnySubrects));
+
+  // Zero subrects counter
+  rdr::U8 *numSubrectsPtr = dst;
+  *dst++ = 0;
+
+  for (int i = 0; i < m_numSubrects; i++) {
+    if (m_colors[i] == m_background)
+      continue;
+
+    if (m_flags & hextileSubrectsColoured) {
+#if (BPP == 8)
+      *dst++ = m_colors[i];
+#elif (BPP == 16)
+      *dst++ = ((rdr::U8*)&m_colors[i])[0];
+      *dst++ = ((rdr::U8*)&m_colors[i])[1];
+#elif (BPP == 32)
+      *dst++ = ((rdr::U8*)&m_colors[i])[0];
+      *dst++ = ((rdr::U8*)&m_colors[i])[1];
+      *dst++ = ((rdr::U8*)&m_colors[i])[2];
+      *dst++ = ((rdr::U8*)&m_colors[i])[3];
+#endif
+    }
+    *dst++ = m_coords[i * 2];
+    *dst++ = m_coords[i * 2 + 1];
+
+    (*numSubrectsPtr)++;
+  }
+
+  assert(dst - numSubrectsPtr == m_size);
+}
+
+//
+// Main encoding function.
+//
+
+void HEXTILE_ENCODE(const Rect& r, rdr::OutStream* os
+#ifdef EXTRA_ARGS
+                    , EXTRA_ARGS
+#endif
+                    )
+{
+  Rect t;
+  PIXEL_T buf[256];
+  PIXEL_T oldBg = 0, oldFg = 0;
+  bool oldBgValid = false;
+  bool oldFgValid = false;
+  rdr::U8 encoded[256*(BPP/8)];
+
+  HEXTILE_TILE tile;
+
+  for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 16) {
+
+    t.br.y = __rfbmin(r.br.y, t.tl.y + 16);
+
+    for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 16) {
+
+      t.br.x = __rfbmin(r.br.x, t.tl.x + 16);
+
+      GET_IMAGE_INTO_BUF(t,buf);
+
+      tile.newTile(buf, t.width(), t.height());
+      int tileType = tile.getFlags();
+      int encodedLen = tile.getSize();
+
+      if ( (tileType & hextileRaw) != 0 ||
+           encodedLen >= t.width() * t.height() * (BPP/8)) {
+        os->writeU8(hextileRaw);
+        os->writeBytes(buf, t.width() * t.height() * (BPP/8));
+        oldBgValid = oldFgValid = false;
+        continue;
+      }
+
+      PIXEL_T bg = tile.getBackground();
+      PIXEL_T fg = 0;
+
+      if (!oldBgValid || oldBg != bg) {
+        tileType |= hextileBgSpecified;
+        oldBg = bg;
+        oldBgValid = true;
+      }
+
+      if (tileType & hextileAnySubrects) {
+        if (tileType & hextileSubrectsColoured) {
+          oldFgValid = false;
+        } else {
+          fg = tile.getForeground();
+          if (!oldFgValid || oldFg != fg) {
+            tileType |= hextileFgSpecified;
+            oldFg = fg;
+            oldFgValid = true;
+          }
+        }
+        tile.encode(encoded);
+      }
+
+      os->writeU8(tileType);
+      if (tileType & hextileBgSpecified) os->WRITE_PIXEL(bg);
+      if (tileType & hextileFgSpecified) os->WRITE_PIXEL(fg);
+      if (tileType & hextileAnySubrects) os->writeBytes(encoded, encodedLen);
+    }
+  }
+}
+
+#undef PIXEL_T
+#undef WRITE_PIXEL
+#undef HEXTILE_TILE
+#undef HEXTILE_ENCODE
+}
diff --git a/common/rfb/keysymdef.h b/common/rfb/keysymdef.h
new file mode 100644
index 00000000..979ebdd5
--- /dev/null
+++ b/common/rfb/keysymdef.h
@@ -0,0 +1,1595 @@
+/* $TOG: keysymdef.h /main/28 1998/05/22 16:18:01 kaleb $ */
+
+/***********************************************************
+Copyright 1987, 1994, 1998  The Open Group
+
+All Rights Reserved.
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall
+not be used in advertising or otherwise to promote the sale, use or
+other dealings in this Software without prior written authorization
+from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+
+#define XK_VoidSymbol		0xFFFFFF	/* void symbol */
+
+#ifdef XK_MISCELLANY
+/*
+ * TTY Functions, cleverly chosen to map to ascii, for convenience of
+ * programming, but could have been arbitrary (at the cost of lookup
+ * tables in client code.
+ */
+
+#define XK_BackSpace		0xFF08	/* back space, back char */
+#define XK_Tab			0xFF09
+#define XK_Linefeed		0xFF0A	/* Linefeed, LF */
+#define XK_Clear		0xFF0B
+#define XK_Return		0xFF0D	/* Return, enter */
+#define XK_Pause		0xFF13	/* Pause, hold */
+#define XK_Scroll_Lock		0xFF14
+#define XK_Sys_Req		0xFF15
+#define XK_Escape		0xFF1B
+#define XK_Delete		0xFFFF	/* Delete, rubout */
+
+
+
+/* International & multi-key character composition */
+
+#define XK_Multi_key		0xFF20  /* Multi-key character compose */
+#define XK_Codeinput		0xFF37
+#define XK_SingleCandidate	0xFF3C
+#define XK_MultipleCandidate	0xFF3D
+#define XK_PreviousCandidate	0xFF3E
+
+/* Japanese keyboard support */
+
+#define XK_Kanji		0xFF21	/* Kanji, Kanji convert */
+#define XK_Muhenkan		0xFF22  /* Cancel Conversion */
+#define XK_Henkan_Mode		0xFF23  /* Start/Stop Conversion */
+#define XK_Henkan		0xFF23  /* Alias for Henkan_Mode */
+#define XK_Romaji		0xFF24  /* to Romaji */
+#define XK_Hiragana		0xFF25  /* to Hiragana */
+#define XK_Katakana		0xFF26  /* to Katakana */
+#define XK_Hiragana_Katakana	0xFF27  /* Hiragana/Katakana toggle */
+#define XK_Zenkaku		0xFF28  /* to Zenkaku */
+#define XK_Hankaku		0xFF29  /* to Hankaku */
+#define XK_Zenkaku_Hankaku	0xFF2A  /* Zenkaku/Hankaku toggle */
+#define XK_Touroku		0xFF2B  /* Add to Dictionary */
+#define XK_Massyo		0xFF2C  /* Delete from Dictionary */
+#define XK_Kana_Lock		0xFF2D  /* Kana Lock */
+#define XK_Kana_Shift		0xFF2E  /* Kana Shift */
+#define XK_Eisu_Shift		0xFF2F  /* Alphanumeric Shift */
+#define XK_Eisu_toggle		0xFF30  /* Alphanumeric toggle */
+#define XK_Kanji_Bangou		0xFF37  /* Codeinput */
+#define XK_Zen_Koho		0xFF3D	/* Multiple/All Candidate(s) */
+#define XK_Mae_Koho		0xFF3E	/* Previous Candidate */
+
+/* 0xFF31 thru 0xFF3F are under XK_KOREAN */
+
+/* Cursor control & motion */
+
+#define XK_Home			0xFF50
+#define XK_Left			0xFF51	/* Move left, left arrow */
+#define XK_Up			0xFF52	/* Move up, up arrow */
+#define XK_Right		0xFF53	/* Move right, right arrow */
+#define XK_Down			0xFF54	/* Move down, down arrow */
+#define XK_Prior		0xFF55	/* Prior, previous */
+#define XK_Page_Up		0xFF55
+#define XK_Next			0xFF56	/* Next */
+#define XK_Page_Down		0xFF56
+#define XK_End			0xFF57	/* EOL */
+#define XK_Begin		0xFF58	/* BOL */
+
+
+/* Misc Functions */
+
+#define XK_Select		0xFF60	/* Select, mark */
+#define XK_Print		0xFF61
+#define XK_Execute		0xFF62	/* Execute, run, do */
+#define XK_Insert		0xFF63	/* Insert, insert here */
+#define XK_Undo			0xFF65	/* Undo, oops */
+#define XK_Redo			0xFF66	/* redo, again */
+#define XK_Menu			0xFF67
+#define XK_Find			0xFF68	/* Find, search */
+#define XK_Cancel		0xFF69	/* Cancel, stop, abort, exit */
+#define XK_Help			0xFF6A	/* Help */
+#define XK_Break		0xFF6B
+#define XK_Mode_switch		0xFF7E	/* Character set switch */
+#define XK_script_switch        0xFF7E  /* Alias for mode_switch */
+#define XK_Num_Lock		0xFF7F
+
+/* Keypad Functions, keypad numbers cleverly chosen to map to ascii */
+
+#define XK_KP_Space		0xFF80	/* space */
+#define XK_KP_Tab		0xFF89
+#define XK_KP_Enter		0xFF8D	/* enter */
+#define XK_KP_F1		0xFF91	/* PF1, KP_A, ... */
+#define XK_KP_F2		0xFF92
+#define XK_KP_F3		0xFF93
+#define XK_KP_F4		0xFF94
+#define XK_KP_Home		0xFF95
+#define XK_KP_Left		0xFF96
+#define XK_KP_Up		0xFF97
+#define XK_KP_Right		0xFF98
+#define XK_KP_Down		0xFF99
+#define XK_KP_Prior		0xFF9A
+#define XK_KP_Page_Up		0xFF9A
+#define XK_KP_Next		0xFF9B
+#define XK_KP_Page_Down		0xFF9B
+#define XK_KP_End		0xFF9C
+#define XK_KP_Begin		0xFF9D
+#define XK_KP_Insert		0xFF9E
+#define XK_KP_Delete		0xFF9F
+#define XK_KP_Equal		0xFFBD	/* equals */
+#define XK_KP_Multiply		0xFFAA
+#define XK_KP_Add		0xFFAB
+#define XK_KP_Separator		0xFFAC	/* separator, often comma */
+#define XK_KP_Subtract		0xFFAD
+#define XK_KP_Decimal		0xFFAE
+#define XK_KP_Divide		0xFFAF
+
+#define XK_KP_0			0xFFB0
+#define XK_KP_1			0xFFB1
+#define XK_KP_2			0xFFB2
+#define XK_KP_3			0xFFB3
+#define XK_KP_4			0xFFB4
+#define XK_KP_5			0xFFB5
+#define XK_KP_6			0xFFB6
+#define XK_KP_7			0xFFB7
+#define XK_KP_8			0xFFB8
+#define XK_KP_9			0xFFB9
+
+
+
+/*
+ * Auxilliary Functions; note the duplicate definitions for left and right
+ * function keys;  Sun keyboards and a few other manufactures have such
+ * function key groups on the left and/or right sides of the keyboard.
+ * We've not found a keyboard with more than 35 function keys total.
+ */
+
+#define XK_F1			0xFFBE
+#define XK_F2			0xFFBF
+#define XK_F3			0xFFC0
+#define XK_F4			0xFFC1
+#define XK_F5			0xFFC2
+#define XK_F6			0xFFC3
+#define XK_F7			0xFFC4
+#define XK_F8			0xFFC5
+#define XK_F9			0xFFC6
+#define XK_F10			0xFFC7
+#define XK_F11			0xFFC8
+#define XK_L1			0xFFC8
+#define XK_F12			0xFFC9
+#define XK_L2			0xFFC9
+#define XK_F13			0xFFCA
+#define XK_L3			0xFFCA
+#define XK_F14			0xFFCB
+#define XK_L4			0xFFCB
+#define XK_F15			0xFFCC
+#define XK_L5			0xFFCC
+#define XK_F16			0xFFCD
+#define XK_L6			0xFFCD
+#define XK_F17			0xFFCE
+#define XK_L7			0xFFCE
+#define XK_F18			0xFFCF
+#define XK_L8			0xFFCF
+#define XK_F19			0xFFD0
+#define XK_L9			0xFFD0
+#define XK_F20			0xFFD1
+#define XK_L10			0xFFD1
+#define XK_F21			0xFFD2
+#define XK_R1			0xFFD2
+#define XK_F22			0xFFD3
+#define XK_R2			0xFFD3
+#define XK_F23			0xFFD4
+#define XK_R3			0xFFD4
+#define XK_F24			0xFFD5
+#define XK_R4			0xFFD5
+#define XK_F25			0xFFD6
+#define XK_R5			0xFFD6
+#define XK_F26			0xFFD7
+#define XK_R6			0xFFD7
+#define XK_F27			0xFFD8
+#define XK_R7			0xFFD8
+#define XK_F28			0xFFD9
+#define XK_R8			0xFFD9
+#define XK_F29			0xFFDA
+#define XK_R9			0xFFDA
+#define XK_F30			0xFFDB
+#define XK_R10			0xFFDB
+#define XK_F31			0xFFDC
+#define XK_R11			0xFFDC
+#define XK_F32			0xFFDD
+#define XK_R12			0xFFDD
+#define XK_F33			0xFFDE
+#define XK_R13			0xFFDE
+#define XK_F34			0xFFDF
+#define XK_R14			0xFFDF
+#define XK_F35			0xFFE0
+#define XK_R15			0xFFE0
+
+/* Modifiers */
+
+#define XK_Shift_L		0xFFE1	/* Left shift */
+#define XK_Shift_R		0xFFE2	/* Right shift */
+#define XK_Control_L		0xFFE3	/* Left control */
+#define XK_Control_R		0xFFE4	/* Right control */
+#define XK_Caps_Lock		0xFFE5	/* Caps lock */
+#define XK_Shift_Lock		0xFFE6	/* Shift lock */
+
+#define XK_Meta_L		0xFFE7	/* Left meta */
+#define XK_Meta_R		0xFFE8	/* Right meta */
+#define XK_Alt_L		0xFFE9	/* Left alt */
+#define XK_Alt_R		0xFFEA	/* Right alt */
+#define XK_Super_L		0xFFEB	/* Left super */
+#define XK_Super_R		0xFFEC	/* Right super */
+#define XK_Hyper_L		0xFFED	/* Left hyper */
+#define XK_Hyper_R		0xFFEE	/* Right hyper */
+#endif /* XK_MISCELLANY */
+
+/*
+ * ISO 9995 Function and Modifier Keys
+ * Byte 3 = 0xFE
+ */
+
+#ifdef XK_XKB_KEYS
+#define	XK_ISO_Lock					0xFE01
+#define	XK_ISO_Level2_Latch				0xFE02
+#define	XK_ISO_Level3_Shift				0xFE03
+#define	XK_ISO_Level3_Latch				0xFE04
+#define	XK_ISO_Level3_Lock				0xFE05
+#define	XK_ISO_Group_Shift		0xFF7E	/* Alias for mode_switch */
+#define	XK_ISO_Group_Latch				0xFE06
+#define	XK_ISO_Group_Lock				0xFE07
+#define	XK_ISO_Next_Group				0xFE08
+#define	XK_ISO_Next_Group_Lock				0xFE09
+#define	XK_ISO_Prev_Group				0xFE0A
+#define	XK_ISO_Prev_Group_Lock				0xFE0B
+#define	XK_ISO_First_Group				0xFE0C
+#define	XK_ISO_First_Group_Lock				0xFE0D
+#define	XK_ISO_Last_Group				0xFE0E
+#define	XK_ISO_Last_Group_Lock				0xFE0F
+
+#define	XK_ISO_Left_Tab					0xFE20
+#define	XK_ISO_Move_Line_Up				0xFE21
+#define	XK_ISO_Move_Line_Down				0xFE22
+#define	XK_ISO_Partial_Line_Up				0xFE23
+#define	XK_ISO_Partial_Line_Down			0xFE24
+#define	XK_ISO_Partial_Space_Left			0xFE25
+#define	XK_ISO_Partial_Space_Right			0xFE26
+#define	XK_ISO_Set_Margin_Left				0xFE27
+#define	XK_ISO_Set_Margin_Right				0xFE28
+#define	XK_ISO_Release_Margin_Left			0xFE29
+#define	XK_ISO_Release_Margin_Right			0xFE2A
+#define	XK_ISO_Release_Both_Margins			0xFE2B
+#define	XK_ISO_Fast_Cursor_Left				0xFE2C
+#define	XK_ISO_Fast_Cursor_Right			0xFE2D
+#define	XK_ISO_Fast_Cursor_Up				0xFE2E
+#define	XK_ISO_Fast_Cursor_Down				0xFE2F
+#define	XK_ISO_Continuous_Underline			0xFE30
+#define	XK_ISO_Discontinuous_Underline			0xFE31
+#define	XK_ISO_Emphasize				0xFE32
+#define	XK_ISO_Center_Object				0xFE33
+#define	XK_ISO_Enter					0xFE34
+
+#define	XK_dead_grave					0xFE50
+#define	XK_dead_acute					0xFE51
+#define	XK_dead_circumflex				0xFE52
+#define	XK_dead_tilde					0xFE53
+#define	XK_dead_macron					0xFE54
+#define	XK_dead_breve					0xFE55
+#define	XK_dead_abovedot				0xFE56
+#define	XK_dead_diaeresis				0xFE57
+#define	XK_dead_abovering				0xFE58
+#define	XK_dead_doubleacute				0xFE59
+#define	XK_dead_caron					0xFE5A
+#define	XK_dead_cedilla					0xFE5B
+#define	XK_dead_ogonek					0xFE5C
+#define	XK_dead_iota					0xFE5D
+#define	XK_dead_voiced_sound				0xFE5E
+#define	XK_dead_semivoiced_sound			0xFE5F
+#define	XK_dead_belowdot				0xFE60
+
+#define	XK_First_Virtual_Screen				0xFED0
+#define	XK_Prev_Virtual_Screen				0xFED1
+#define	XK_Next_Virtual_Screen				0xFED2
+#define	XK_Last_Virtual_Screen				0xFED4
+#define	XK_Terminate_Server				0xFED5
+
+#define	XK_AccessX_Enable				0xFE70
+#define	XK_AccessX_Feedback_Enable			0xFE71
+#define	XK_RepeatKeys_Enable				0xFE72
+#define	XK_SlowKeys_Enable				0xFE73
+#define	XK_BounceKeys_Enable				0xFE74
+#define	XK_StickyKeys_Enable				0xFE75
+#define	XK_MouseKeys_Enable				0xFE76
+#define	XK_MouseKeys_Accel_Enable			0xFE77
+#define	XK_Overlay1_Enable				0xFE78
+#define	XK_Overlay2_Enable				0xFE79
+#define	XK_AudibleBell_Enable				0xFE7A
+
+#define	XK_Pointer_Left					0xFEE0
+#define	XK_Pointer_Right				0xFEE1
+#define	XK_Pointer_Up					0xFEE2
+#define	XK_Pointer_Down					0xFEE3
+#define	XK_Pointer_UpLeft				0xFEE4
+#define	XK_Pointer_UpRight				0xFEE5
+#define	XK_Pointer_DownLeft				0xFEE6
+#define	XK_Pointer_DownRight				0xFEE7
+#define	XK_Pointer_Button_Dflt				0xFEE8
+#define	XK_Pointer_Button1				0xFEE9
+#define	XK_Pointer_Button2				0xFEEA
+#define	XK_Pointer_Button3				0xFEEB
+#define	XK_Pointer_Button4				0xFEEC
+#define	XK_Pointer_Button5				0xFEED
+#define	XK_Pointer_DblClick_Dflt			0xFEEE
+#define	XK_Pointer_DblClick1				0xFEEF
+#define	XK_Pointer_DblClick2				0xFEF0
+#define	XK_Pointer_DblClick3				0xFEF1
+#define	XK_Pointer_DblClick4				0xFEF2
+#define	XK_Pointer_DblClick5				0xFEF3
+#define	XK_Pointer_Drag_Dflt				0xFEF4
+#define	XK_Pointer_Drag1				0xFEF5
+#define	XK_Pointer_Drag2				0xFEF6
+#define	XK_Pointer_Drag3				0xFEF7
+#define	XK_Pointer_Drag4				0xFEF8
+#define	XK_Pointer_Drag5				0xFEFD
+
+#define	XK_Pointer_EnableKeys				0xFEF9
+#define	XK_Pointer_Accelerate				0xFEFA
+#define	XK_Pointer_DfltBtnNext				0xFEFB
+#define	XK_Pointer_DfltBtnPrev				0xFEFC
+
+#endif
+
+/*
+ * 3270 Terminal Keys
+ * Byte 3 = 0xFD
+ */
+
+#ifdef XK_3270
+#define XK_3270_Duplicate      0xFD01
+#define XK_3270_FieldMark      0xFD02
+#define XK_3270_Right2         0xFD03
+#define XK_3270_Left2          0xFD04
+#define XK_3270_BackTab        0xFD05
+#define XK_3270_EraseEOF       0xFD06
+#define XK_3270_EraseInput     0xFD07
+#define XK_3270_Reset          0xFD08
+#define XK_3270_Quit           0xFD09
+#define XK_3270_PA1            0xFD0A
+#define XK_3270_PA2            0xFD0B
+#define XK_3270_PA3            0xFD0C
+#define XK_3270_Test           0xFD0D
+#define XK_3270_Attn           0xFD0E
+#define XK_3270_CursorBlink    0xFD0F
+#define XK_3270_AltCursor      0xFD10
+#define XK_3270_KeyClick       0xFD11
+#define XK_3270_Jump           0xFD12
+#define XK_3270_Ident          0xFD13
+#define XK_3270_Rule           0xFD14
+#define XK_3270_Copy           0xFD15
+#define XK_3270_Play           0xFD16
+#define XK_3270_Setup          0xFD17
+#define XK_3270_Record         0xFD18
+#define XK_3270_ChangeScreen   0xFD19
+#define XK_3270_DeleteWord     0xFD1A
+#define XK_3270_ExSelect       0xFD1B
+#define XK_3270_CursorSelect   0xFD1C
+#define XK_3270_PrintScreen    0xFD1D
+#define XK_3270_Enter          0xFD1E
+#endif
+
+/*
+ *  Latin 1
+ *  Byte 3 = 0
+ */
+#ifdef XK_LATIN1
+#define XK_space               0x020
+#define XK_exclam              0x021
+#define XK_quotedbl            0x022
+#define XK_numbersign          0x023
+#define XK_dollar              0x024
+#define XK_percent             0x025
+#define XK_ampersand           0x026
+#define XK_apostrophe          0x027
+#define XK_quoteright          0x027	/* deprecated */
+#define XK_parenleft           0x028
+#define XK_parenright          0x029
+#define XK_asterisk            0x02a
+#define XK_plus                0x02b
+#define XK_comma               0x02c
+#define XK_minus               0x02d
+#define XK_period              0x02e
+#define XK_slash               0x02f
+#define XK_0                   0x030
+#define XK_1                   0x031
+#define XK_2                   0x032
+#define XK_3                   0x033
+#define XK_4                   0x034
+#define XK_5                   0x035
+#define XK_6                   0x036
+#define XK_7                   0x037
+#define XK_8                   0x038
+#define XK_9                   0x039
+#define XK_colon               0x03a
+#define XK_semicolon           0x03b
+#define XK_less                0x03c
+#define XK_equal               0x03d
+#define XK_greater             0x03e
+#define XK_question            0x03f
+#define XK_at                  0x040
+#define XK_A                   0x041
+#define XK_B                   0x042
+#define XK_C                   0x043
+#define XK_D                   0x044
+#define XK_E                   0x045
+#define XK_F                   0x046
+#define XK_G                   0x047
+#define XK_H                   0x048
+#define XK_I                   0x049
+#define XK_J                   0x04a
+#define XK_K                   0x04b
+#define XK_L                   0x04c
+#define XK_M                   0x04d
+#define XK_N                   0x04e
+#define XK_O                   0x04f
+#define XK_P                   0x050
+#define XK_Q                   0x051
+#define XK_R                   0x052
+#define XK_S                   0x053
+#define XK_T                   0x054
+#define XK_U                   0x055
+#define XK_V                   0x056
+#define XK_W                   0x057
+#define XK_X                   0x058
+#define XK_Y                   0x059
+#define XK_Z                   0x05a
+#define XK_bracketleft         0x05b
+#define XK_backslash           0x05c
+#define XK_bracketright        0x05d
+#define XK_asciicircum         0x05e
+#define XK_underscore          0x05f
+#define XK_grave               0x060
+#define XK_quoteleft           0x060	/* deprecated */
+#define XK_a                   0x061
+#define XK_b                   0x062
+#define XK_c                   0x063
+#define XK_d                   0x064
+#define XK_e                   0x065
+#define XK_f                   0x066
+#define XK_g                   0x067
+#define XK_h                   0x068
+#define XK_i                   0x069
+#define XK_j                   0x06a
+#define XK_k                   0x06b
+#define XK_l                   0x06c
+#define XK_m                   0x06d
+#define XK_n                   0x06e
+#define XK_o                   0x06f
+#define XK_p                   0x070
+#define XK_q                   0x071
+#define XK_r                   0x072
+#define XK_s                   0x073
+#define XK_t                   0x074
+#define XK_u                   0x075
+#define XK_v                   0x076
+#define XK_w                   0x077
+#define XK_x                   0x078
+#define XK_y                   0x079
+#define XK_z                   0x07a
+#define XK_braceleft           0x07b
+#define XK_bar                 0x07c
+#define XK_braceright          0x07d
+#define XK_asciitilde          0x07e
+
+#define XK_nobreakspace        0x0a0
+#define XK_exclamdown          0x0a1
+#define XK_cent        	       0x0a2
+#define XK_sterling            0x0a3
+#define XK_currency            0x0a4
+#define XK_yen                 0x0a5
+#define XK_brokenbar           0x0a6
+#define XK_section             0x0a7
+#define XK_diaeresis           0x0a8
+#define XK_copyright           0x0a9
+#define XK_ordfeminine         0x0aa
+#define XK_guillemotleft       0x0ab	/* left angle quotation mark */
+#define XK_notsign             0x0ac
+#define XK_hyphen              0x0ad
+#define XK_registered          0x0ae
+#define XK_macron              0x0af
+#define XK_degree              0x0b0
+#define XK_plusminus           0x0b1
+#define XK_twosuperior         0x0b2
+#define XK_threesuperior       0x0b3
+#define XK_acute               0x0b4
+#define XK_mu                  0x0b5
+#define XK_paragraph           0x0b6
+#define XK_periodcentered      0x0b7
+#define XK_cedilla             0x0b8
+#define XK_onesuperior         0x0b9
+#define XK_masculine           0x0ba
+#define XK_guillemotright      0x0bb	/* right angle quotation mark */
+#define XK_onequarter          0x0bc
+#define XK_onehalf             0x0bd
+#define XK_threequarters       0x0be
+#define XK_questiondown        0x0bf
+#define XK_Agrave              0x0c0
+#define XK_Aacute              0x0c1
+#define XK_Acircumflex         0x0c2
+#define XK_Atilde              0x0c3
+#define XK_Adiaeresis          0x0c4
+#define XK_Aring               0x0c5
+#define XK_AE                  0x0c6
+#define XK_Ccedilla            0x0c7
+#define XK_Egrave              0x0c8
+#define XK_Eacute              0x0c9
+#define XK_Ecircumflex         0x0ca
+#define XK_Ediaeresis          0x0cb
+#define XK_Igrave              0x0cc
+#define XK_Iacute              0x0cd
+#define XK_Icircumflex         0x0ce
+#define XK_Idiaeresis          0x0cf
+#define XK_ETH                 0x0d0
+#define XK_Eth                 0x0d0	/* deprecated */
+#define XK_Ntilde              0x0d1
+#define XK_Ograve              0x0d2
+#define XK_Oacute              0x0d3
+#define XK_Ocircumflex         0x0d4
+#define XK_Otilde              0x0d5
+#define XK_Odiaeresis          0x0d6
+#define XK_multiply            0x0d7
+#define XK_Ooblique            0x0d8
+#define XK_Ugrave              0x0d9
+#define XK_Uacute              0x0da
+#define XK_Ucircumflex         0x0db
+#define XK_Udiaeresis          0x0dc
+#define XK_Yacute              0x0dd
+#define XK_THORN               0x0de
+#define XK_Thorn               0x0de	/* deprecated */
+#define XK_ssharp              0x0df
+#define XK_agrave              0x0e0
+#define XK_aacute              0x0e1
+#define XK_acircumflex         0x0e2
+#define XK_atilde              0x0e3
+#define XK_adiaeresis          0x0e4
+#define XK_aring               0x0e5
+#define XK_ae                  0x0e6
+#define XK_ccedilla            0x0e7
+#define XK_egrave              0x0e8
+#define XK_eacute              0x0e9
+#define XK_ecircumflex         0x0ea
+#define XK_ediaeresis          0x0eb
+#define XK_igrave              0x0ec
+#define XK_iacute              0x0ed
+#define XK_icircumflex         0x0ee
+#define XK_idiaeresis          0x0ef
+#define XK_eth                 0x0f0
+#define XK_ntilde              0x0f1
+#define XK_ograve              0x0f2
+#define XK_oacute              0x0f3
+#define XK_ocircumflex         0x0f4
+#define XK_otilde              0x0f5
+#define XK_odiaeresis          0x0f6
+#define XK_division            0x0f7
+#define XK_oslash              0x0f8
+#define XK_ugrave              0x0f9
+#define XK_uacute              0x0fa
+#define XK_ucircumflex         0x0fb
+#define XK_udiaeresis          0x0fc
+#define XK_yacute              0x0fd
+#define XK_thorn               0x0fe
+#define XK_ydiaeresis          0x0ff
+#endif /* XK_LATIN1 */
+
+/*
+ *   Latin 2
+ *   Byte 3 = 1
+ */
+
+#ifdef XK_LATIN2
+#define XK_Aogonek             0x1a1
+#define XK_breve               0x1a2
+#define XK_Lstroke             0x1a3
+#define XK_Lcaron              0x1a5
+#define XK_Sacute              0x1a6
+#define XK_Scaron              0x1a9
+#define XK_Scedilla            0x1aa
+#define XK_Tcaron              0x1ab
+#define XK_Zacute              0x1ac
+#define XK_Zcaron              0x1ae
+#define XK_Zabovedot           0x1af
+#define XK_aogonek             0x1b1
+#define XK_ogonek              0x1b2
+#define XK_lstroke             0x1b3
+#define XK_lcaron              0x1b5
+#define XK_sacute              0x1b6
+#define XK_caron               0x1b7
+#define XK_scaron              0x1b9
+#define XK_scedilla            0x1ba
+#define XK_tcaron              0x1bb
+#define XK_zacute              0x1bc
+#define XK_doubleacute         0x1bd
+#define XK_zcaron              0x1be
+#define XK_zabovedot           0x1bf
+#define XK_Racute              0x1c0
+#define XK_Abreve              0x1c3
+#define XK_Lacute              0x1c5
+#define XK_Cacute              0x1c6
+#define XK_Ccaron              0x1c8
+#define XK_Eogonek             0x1ca
+#define XK_Ecaron              0x1cc
+#define XK_Dcaron              0x1cf
+#define XK_Dstroke             0x1d0
+#define XK_Nacute              0x1d1
+#define XK_Ncaron              0x1d2
+#define XK_Odoubleacute        0x1d5
+#define XK_Rcaron              0x1d8
+#define XK_Uring               0x1d9
+#define XK_Udoubleacute        0x1db
+#define XK_Tcedilla            0x1de
+#define XK_racute              0x1e0
+#define XK_abreve              0x1e3
+#define XK_lacute              0x1e5
+#define XK_cacute              0x1e6
+#define XK_ccaron              0x1e8
+#define XK_eogonek             0x1ea
+#define XK_ecaron              0x1ec
+#define XK_dcaron              0x1ef
+#define XK_dstroke             0x1f0
+#define XK_nacute              0x1f1
+#define XK_ncaron              0x1f2
+#define XK_odoubleacute        0x1f5
+#define XK_udoubleacute        0x1fb
+#define XK_rcaron              0x1f8
+#define XK_uring               0x1f9
+#define XK_tcedilla            0x1fe
+#define XK_abovedot            0x1ff
+#endif /* XK_LATIN2 */
+
+/*
+ *   Latin 3
+ *   Byte 3 = 2
+ */
+
+#ifdef XK_LATIN3
+#define XK_Hstroke             0x2a1
+#define XK_Hcircumflex         0x2a6
+#define XK_Iabovedot           0x2a9
+#define XK_Gbreve              0x2ab
+#define XK_Jcircumflex         0x2ac
+#define XK_hstroke             0x2b1
+#define XK_hcircumflex         0x2b6
+#define XK_idotless            0x2b9
+#define XK_gbreve              0x2bb
+#define XK_jcircumflex         0x2bc
+#define XK_Cabovedot           0x2c5
+#define XK_Ccircumflex         0x2c6
+#define XK_Gabovedot           0x2d5
+#define XK_Gcircumflex         0x2d8
+#define XK_Ubreve              0x2dd
+#define XK_Scircumflex         0x2de
+#define XK_cabovedot           0x2e5
+#define XK_ccircumflex         0x2e6
+#define XK_gabovedot           0x2f5
+#define XK_gcircumflex         0x2f8
+#define XK_ubreve              0x2fd
+#define XK_scircumflex         0x2fe
+#endif /* XK_LATIN3 */
+
+
+/*
+ *   Latin 4
+ *   Byte 3 = 3
+ */
+
+#ifdef XK_LATIN4
+#define XK_kra                 0x3a2
+#define XK_kappa               0x3a2	/* deprecated */
+#define XK_Rcedilla            0x3a3
+#define XK_Itilde              0x3a5
+#define XK_Lcedilla            0x3a6
+#define XK_Emacron             0x3aa
+#define XK_Gcedilla            0x3ab
+#define XK_Tslash              0x3ac
+#define XK_rcedilla            0x3b3
+#define XK_itilde              0x3b5
+#define XK_lcedilla            0x3b6
+#define XK_emacron             0x3ba
+#define XK_gcedilla            0x3bb
+#define XK_tslash              0x3bc
+#define XK_ENG                 0x3bd
+#define XK_eng                 0x3bf
+#define XK_Amacron             0x3c0
+#define XK_Iogonek             0x3c7
+#define XK_Eabovedot           0x3cc
+#define XK_Imacron             0x3cf
+#define XK_Ncedilla            0x3d1
+#define XK_Omacron             0x3d2
+#define XK_Kcedilla            0x3d3
+#define XK_Uogonek             0x3d9
+#define XK_Utilde              0x3dd
+#define XK_Umacron             0x3de
+#define XK_amacron             0x3e0
+#define XK_iogonek             0x3e7
+#define XK_eabovedot           0x3ec
+#define XK_imacron             0x3ef
+#define XK_ncedilla            0x3f1
+#define XK_omacron             0x3f2
+#define XK_kcedilla            0x3f3
+#define XK_uogonek             0x3f9
+#define XK_utilde              0x3fd
+#define XK_umacron             0x3fe
+#endif /* XK_LATIN4 */
+
+/*
+ * Latin-9 (a.k.a. Latin-0)
+ * Byte 3 = 19
+ */
+
+#ifdef XK_LATIN9
+#define XK_OE                  0x13bc
+#define XK_oe                  0x13bd
+#define XK_Ydiaeresis          0x13be
+#endif /* XK_LATIN9 */
+
+/*
+ * Katakana
+ * Byte 3 = 4
+ */
+
+#ifdef XK_KATAKANA
+#define XK_overline				       0x47e
+#define XK_kana_fullstop                               0x4a1
+#define XK_kana_openingbracket                         0x4a2
+#define XK_kana_closingbracket                         0x4a3
+#define XK_kana_comma                                  0x4a4
+#define XK_kana_conjunctive                            0x4a5
+#define XK_kana_middledot                              0x4a5  /* deprecated */
+#define XK_kana_WO                                     0x4a6
+#define XK_kana_a                                      0x4a7
+#define XK_kana_i                                      0x4a8
+#define XK_kana_u                                      0x4a9
+#define XK_kana_e                                      0x4aa
+#define XK_kana_o                                      0x4ab
+#define XK_kana_ya                                     0x4ac
+#define XK_kana_yu                                     0x4ad
+#define XK_kana_yo                                     0x4ae
+#define XK_kana_tsu                                    0x4af
+#define XK_kana_tu                                     0x4af  /* deprecated */
+#define XK_prolongedsound                              0x4b0
+#define XK_kana_A                                      0x4b1
+#define XK_kana_I                                      0x4b2
+#define XK_kana_U                                      0x4b3
+#define XK_kana_E                                      0x4b4
+#define XK_kana_O                                      0x4b5
+#define XK_kana_KA                                     0x4b6
+#define XK_kana_KI                                     0x4b7
+#define XK_kana_KU                                     0x4b8
+#define XK_kana_KE                                     0x4b9
+#define XK_kana_KO                                     0x4ba
+#define XK_kana_SA                                     0x4bb
+#define XK_kana_SHI                                    0x4bc
+#define XK_kana_SU                                     0x4bd
+#define XK_kana_SE                                     0x4be
+#define XK_kana_SO                                     0x4bf
+#define XK_kana_TA                                     0x4c0
+#define XK_kana_CHI                                    0x4c1
+#define XK_kana_TI                                     0x4c1  /* deprecated */
+#define XK_kana_TSU                                    0x4c2
+#define XK_kana_TU                                     0x4c2  /* deprecated */
+#define XK_kana_TE                                     0x4c3
+#define XK_kana_TO                                     0x4c4
+#define XK_kana_NA                                     0x4c5
+#define XK_kana_NI                                     0x4c6
+#define XK_kana_NU                                     0x4c7
+#define XK_kana_NE                                     0x4c8
+#define XK_kana_NO                                     0x4c9
+#define XK_kana_HA                                     0x4ca
+#define XK_kana_HI                                     0x4cb
+#define XK_kana_FU                                     0x4cc
+#define XK_kana_HU                                     0x4cc  /* deprecated */
+#define XK_kana_HE                                     0x4cd
+#define XK_kana_HO                                     0x4ce
+#define XK_kana_MA                                     0x4cf
+#define XK_kana_MI                                     0x4d0
+#define XK_kana_MU                                     0x4d1
+#define XK_kana_ME                                     0x4d2
+#define XK_kana_MO                                     0x4d3
+#define XK_kana_YA                                     0x4d4
+#define XK_kana_YU                                     0x4d5
+#define XK_kana_YO                                     0x4d6
+#define XK_kana_RA                                     0x4d7
+#define XK_kana_RI                                     0x4d8
+#define XK_kana_RU                                     0x4d9
+#define XK_kana_RE                                     0x4da
+#define XK_kana_RO                                     0x4db
+#define XK_kana_WA                                     0x4dc
+#define XK_kana_N                                      0x4dd
+#define XK_voicedsound                                 0x4de
+#define XK_semivoicedsound                             0x4df
+#define XK_kana_switch          0xFF7E  /* Alias for mode_switch */
+#endif /* XK_KATAKANA */
+
+/*
+ *  Arabic
+ *  Byte 3 = 5
+ */
+
+#ifdef XK_ARABIC
+#define XK_Arabic_comma                                0x5ac
+#define XK_Arabic_semicolon                            0x5bb
+#define XK_Arabic_question_mark                        0x5bf
+#define XK_Arabic_hamza                                0x5c1
+#define XK_Arabic_maddaonalef                          0x5c2
+#define XK_Arabic_hamzaonalef                          0x5c3
+#define XK_Arabic_hamzaonwaw                           0x5c4
+#define XK_Arabic_hamzaunderalef                       0x5c5
+#define XK_Arabic_hamzaonyeh                           0x5c6
+#define XK_Arabic_alef                                 0x5c7
+#define XK_Arabic_beh                                  0x5c8
+#define XK_Arabic_tehmarbuta                           0x5c9
+#define XK_Arabic_teh                                  0x5ca
+#define XK_Arabic_theh                                 0x5cb
+#define XK_Arabic_jeem                                 0x5cc
+#define XK_Arabic_hah                                  0x5cd
+#define XK_Arabic_khah                                 0x5ce
+#define XK_Arabic_dal                                  0x5cf
+#define XK_Arabic_thal                                 0x5d0
+#define XK_Arabic_ra                                   0x5d1
+#define XK_Arabic_zain                                 0x5d2
+#define XK_Arabic_seen                                 0x5d3
+#define XK_Arabic_sheen                                0x5d4
+#define XK_Arabic_sad                                  0x5d5
+#define XK_Arabic_dad                                  0x5d6
+#define XK_Arabic_tah                                  0x5d7
+#define XK_Arabic_zah                                  0x5d8
+#define XK_Arabic_ain                                  0x5d9
+#define XK_Arabic_ghain                                0x5da
+#define XK_Arabic_tatweel                              0x5e0
+#define XK_Arabic_feh                                  0x5e1
+#define XK_Arabic_qaf                                  0x5e2
+#define XK_Arabic_kaf                                  0x5e3
+#define XK_Arabic_lam                                  0x5e4
+#define XK_Arabic_meem                                 0x5e5
+#define XK_Arabic_noon                                 0x5e6
+#define XK_Arabic_ha                                   0x5e7
+#define XK_Arabic_heh                                  0x5e7  /* deprecated */
+#define XK_Arabic_waw                                  0x5e8
+#define XK_Arabic_alefmaksura                          0x5e9
+#define XK_Arabic_yeh                                  0x5ea
+#define XK_Arabic_fathatan                             0x5eb
+#define XK_Arabic_dammatan                             0x5ec
+#define XK_Arabic_kasratan                             0x5ed
+#define XK_Arabic_fatha                                0x5ee
+#define XK_Arabic_damma                                0x5ef
+#define XK_Arabic_kasra                                0x5f0
+#define XK_Arabic_shadda                               0x5f1
+#define XK_Arabic_sukun                                0x5f2
+#define XK_Arabic_switch        0xFF7E  /* Alias for mode_switch */
+#endif /* XK_ARABIC */
+
+/*
+ * Cyrillic
+ * Byte 3 = 6
+ */
+#ifdef XK_CYRILLIC
+#define XK_Serbian_dje                                 0x6a1
+#define XK_Macedonia_gje                               0x6a2
+#define XK_Cyrillic_io                                 0x6a3
+#define XK_Ukrainian_ie                                0x6a4
+#define XK_Ukranian_je                                 0x6a4  /* deprecated */
+#define XK_Macedonia_dse                               0x6a5
+#define XK_Ukrainian_i                                 0x6a6
+#define XK_Ukranian_i                                  0x6a6  /* deprecated */
+#define XK_Ukrainian_yi                                0x6a7
+#define XK_Ukranian_yi                                 0x6a7  /* deprecated */
+#define XK_Cyrillic_je                                 0x6a8
+#define XK_Serbian_je                                  0x6a8  /* deprecated */
+#define XK_Cyrillic_lje                                0x6a9
+#define XK_Serbian_lje                                 0x6a9  /* deprecated */
+#define XK_Cyrillic_nje                                0x6aa
+#define XK_Serbian_nje                                 0x6aa  /* deprecated */
+#define XK_Serbian_tshe                                0x6ab
+#define XK_Macedonia_kje                               0x6ac
+#define XK_Byelorussian_shortu                         0x6ae
+#define XK_Cyrillic_dzhe                               0x6af
+#define XK_Serbian_dze                                 0x6af  /* deprecated */
+#define XK_numerosign                                  0x6b0
+#define XK_Serbian_DJE                                 0x6b1
+#define XK_Macedonia_GJE                               0x6b2
+#define XK_Cyrillic_IO                                 0x6b3
+#define XK_Ukrainian_IE                                0x6b4
+#define XK_Ukranian_JE                                 0x6b4  /* deprecated */
+#define XK_Macedonia_DSE                               0x6b5
+#define XK_Ukrainian_I                                 0x6b6
+#define XK_Ukranian_I                                  0x6b6  /* deprecated */
+#define XK_Ukrainian_YI                                0x6b7
+#define XK_Ukranian_YI                                 0x6b7  /* deprecated */
+#define XK_Cyrillic_JE                                 0x6b8
+#define XK_Serbian_JE                                  0x6b8  /* deprecated */
+#define XK_Cyrillic_LJE                                0x6b9
+#define XK_Serbian_LJE                                 0x6b9  /* deprecated */
+#define XK_Cyrillic_NJE                                0x6ba
+#define XK_Serbian_NJE                                 0x6ba  /* deprecated */
+#define XK_Serbian_TSHE                                0x6bb
+#define XK_Macedonia_KJE                               0x6bc
+#define XK_Byelorussian_SHORTU                         0x6be
+#define XK_Cyrillic_DZHE                               0x6bf
+#define XK_Serbian_DZE                                 0x6bf  /* deprecated */
+#define XK_Cyrillic_yu                                 0x6c0
+#define XK_Cyrillic_a                                  0x6c1
+#define XK_Cyrillic_be                                 0x6c2
+#define XK_Cyrillic_tse                                0x6c3
+#define XK_Cyrillic_de                                 0x6c4
+#define XK_Cyrillic_ie                                 0x6c5
+#define XK_Cyrillic_ef                                 0x6c6
+#define XK_Cyrillic_ghe                                0x6c7
+#define XK_Cyrillic_ha                                 0x6c8
+#define XK_Cyrillic_i                                  0x6c9
+#define XK_Cyrillic_shorti                             0x6ca
+#define XK_Cyrillic_ka                                 0x6cb
+#define XK_Cyrillic_el                                 0x6cc
+#define XK_Cyrillic_em                                 0x6cd
+#define XK_Cyrillic_en                                 0x6ce
+#define XK_Cyrillic_o                                  0x6cf
+#define XK_Cyrillic_pe                                 0x6d0
+#define XK_Cyrillic_ya                                 0x6d1
+#define XK_Cyrillic_er                                 0x6d2
+#define XK_Cyrillic_es                                 0x6d3
+#define XK_Cyrillic_te                                 0x6d4
+#define XK_Cyrillic_u                                  0x6d5
+#define XK_Cyrillic_zhe                                0x6d6
+#define XK_Cyrillic_ve                                 0x6d7
+#define XK_Cyrillic_softsign                           0x6d8
+#define XK_Cyrillic_yeru                               0x6d9
+#define XK_Cyrillic_ze                                 0x6da
+#define XK_Cyrillic_sha                                0x6db
+#define XK_Cyrillic_e                                  0x6dc
+#define XK_Cyrillic_shcha                              0x6dd
+#define XK_Cyrillic_che                                0x6de
+#define XK_Cyrillic_hardsign                           0x6df
+#define XK_Cyrillic_YU                                 0x6e0
+#define XK_Cyrillic_A                                  0x6e1
+#define XK_Cyrillic_BE                                 0x6e2
+#define XK_Cyrillic_TSE                                0x6e3
+#define XK_Cyrillic_DE                                 0x6e4
+#define XK_Cyrillic_IE                                 0x6e5
+#define XK_Cyrillic_EF                                 0x6e6
+#define XK_Cyrillic_GHE                                0x6e7
+#define XK_Cyrillic_HA                                 0x6e8
+#define XK_Cyrillic_I                                  0x6e9
+#define XK_Cyrillic_SHORTI                             0x6ea
+#define XK_Cyrillic_KA                                 0x6eb
+#define XK_Cyrillic_EL                                 0x6ec
+#define XK_Cyrillic_EM                                 0x6ed
+#define XK_Cyrillic_EN                                 0x6ee
+#define XK_Cyrillic_O                                  0x6ef
+#define XK_Cyrillic_PE                                 0x6f0
+#define XK_Cyrillic_YA                                 0x6f1
+#define XK_Cyrillic_ER                                 0x6f2
+#define XK_Cyrillic_ES                                 0x6f3
+#define XK_Cyrillic_TE                                 0x6f4
+#define XK_Cyrillic_U                                  0x6f5
+#define XK_Cyrillic_ZHE                                0x6f6
+#define XK_Cyrillic_VE                                 0x6f7
+#define XK_Cyrillic_SOFTSIGN                           0x6f8
+#define XK_Cyrillic_YERU                               0x6f9
+#define XK_Cyrillic_ZE                                 0x6fa
+#define XK_Cyrillic_SHA                                0x6fb
+#define XK_Cyrillic_E                                  0x6fc
+#define XK_Cyrillic_SHCHA                              0x6fd
+#define XK_Cyrillic_CHE                                0x6fe
+#define XK_Cyrillic_HARDSIGN                           0x6ff
+#endif /* XK_CYRILLIC */
+
+/*
+ * Greek
+ * Byte 3 = 7
+ */
+
+#ifdef XK_GREEK
+#define XK_Greek_ALPHAaccent                           0x7a1
+#define XK_Greek_EPSILONaccent                         0x7a2
+#define XK_Greek_ETAaccent                             0x7a3
+#define XK_Greek_IOTAaccent                            0x7a4
+#define XK_Greek_IOTAdiaeresis                         0x7a5
+#define XK_Greek_OMICRONaccent                         0x7a7
+#define XK_Greek_UPSILONaccent                         0x7a8
+#define XK_Greek_UPSILONdieresis                       0x7a9
+#define XK_Greek_OMEGAaccent                           0x7ab
+#define XK_Greek_accentdieresis                        0x7ae
+#define XK_Greek_horizbar                              0x7af
+#define XK_Greek_alphaaccent                           0x7b1
+#define XK_Greek_epsilonaccent                         0x7b2
+#define XK_Greek_etaaccent                             0x7b3
+#define XK_Greek_iotaaccent                            0x7b4
+#define XK_Greek_iotadieresis                          0x7b5
+#define XK_Greek_iotaaccentdieresis                    0x7b6
+#define XK_Greek_omicronaccent                         0x7b7
+#define XK_Greek_upsilonaccent                         0x7b8
+#define XK_Greek_upsilondieresis                       0x7b9
+#define XK_Greek_upsilonaccentdieresis                 0x7ba
+#define XK_Greek_omegaaccent                           0x7bb
+#define XK_Greek_ALPHA                                 0x7c1
+#define XK_Greek_BETA                                  0x7c2
+#define XK_Greek_GAMMA                                 0x7c3
+#define XK_Greek_DELTA                                 0x7c4
+#define XK_Greek_EPSILON                               0x7c5
+#define XK_Greek_ZETA                                  0x7c6
+#define XK_Greek_ETA                                   0x7c7
+#define XK_Greek_THETA                                 0x7c8
+#define XK_Greek_IOTA                                  0x7c9
+#define XK_Greek_KAPPA                                 0x7ca
+#define XK_Greek_LAMDA                                 0x7cb
+#define XK_Greek_LAMBDA                                0x7cb
+#define XK_Greek_MU                                    0x7cc
+#define XK_Greek_NU                                    0x7cd
+#define XK_Greek_XI                                    0x7ce
+#define XK_Greek_OMICRON                               0x7cf
+#define XK_Greek_PI                                    0x7d0
+#define XK_Greek_RHO                                   0x7d1
+#define XK_Greek_SIGMA                                 0x7d2
+#define XK_Greek_TAU                                   0x7d4
+#define XK_Greek_UPSILON                               0x7d5
+#define XK_Greek_PHI                                   0x7d6
+#define XK_Greek_CHI                                   0x7d7
+#define XK_Greek_PSI                                   0x7d8
+#define XK_Greek_OMEGA                                 0x7d9
+#define XK_Greek_alpha                                 0x7e1
+#define XK_Greek_beta                                  0x7e2
+#define XK_Greek_gamma                                 0x7e3
+#define XK_Greek_delta                                 0x7e4
+#define XK_Greek_epsilon                               0x7e5
+#define XK_Greek_zeta                                  0x7e6
+#define XK_Greek_eta                                   0x7e7
+#define XK_Greek_theta                                 0x7e8
+#define XK_Greek_iota                                  0x7e9
+#define XK_Greek_kappa                                 0x7ea
+#define XK_Greek_lamda                                 0x7eb
+#define XK_Greek_lambda                                0x7eb
+#define XK_Greek_mu                                    0x7ec
+#define XK_Greek_nu                                    0x7ed
+#define XK_Greek_xi                                    0x7ee
+#define XK_Greek_omicron                               0x7ef
+#define XK_Greek_pi                                    0x7f0
+#define XK_Greek_rho                                   0x7f1
+#define XK_Greek_sigma                                 0x7f2
+#define XK_Greek_finalsmallsigma                       0x7f3
+#define XK_Greek_tau                                   0x7f4
+#define XK_Greek_upsilon                               0x7f5
+#define XK_Greek_phi                                   0x7f6
+#define XK_Greek_chi                                   0x7f7
+#define XK_Greek_psi                                   0x7f8
+#define XK_Greek_omega                                 0x7f9
+#define XK_Greek_switch         0xFF7E  /* Alias for mode_switch */
+#endif /* XK_GREEK */
+
+/*
+ * Technical
+ * Byte 3 = 8
+ */
+
+#ifdef XK_TECHNICAL
+#define XK_leftradical                                 0x8a1
+#define XK_topleftradical                              0x8a2
+#define XK_horizconnector                              0x8a3
+#define XK_topintegral                                 0x8a4
+#define XK_botintegral                                 0x8a5
+#define XK_vertconnector                               0x8a6
+#define XK_topleftsqbracket                            0x8a7
+#define XK_botleftsqbracket                            0x8a8
+#define XK_toprightsqbracket                           0x8a9
+#define XK_botrightsqbracket                           0x8aa
+#define XK_topleftparens                               0x8ab
+#define XK_botleftparens                               0x8ac
+#define XK_toprightparens                              0x8ad
+#define XK_botrightparens                              0x8ae
+#define XK_leftmiddlecurlybrace                        0x8af
+#define XK_rightmiddlecurlybrace                       0x8b0
+#define XK_topleftsummation                            0x8b1
+#define XK_botleftsummation                            0x8b2
+#define XK_topvertsummationconnector                   0x8b3
+#define XK_botvertsummationconnector                   0x8b4
+#define XK_toprightsummation                           0x8b5
+#define XK_botrightsummation                           0x8b6
+#define XK_rightmiddlesummation                        0x8b7
+#define XK_lessthanequal                               0x8bc
+#define XK_notequal                                    0x8bd
+#define XK_greaterthanequal                            0x8be
+#define XK_integral                                    0x8bf
+#define XK_therefore                                   0x8c0
+#define XK_variation                                   0x8c1
+#define XK_infinity                                    0x8c2
+#define XK_nabla                                       0x8c5
+#define XK_approximate                                 0x8c8
+#define XK_similarequal                                0x8c9
+#define XK_ifonlyif                                    0x8cd
+#define XK_implies                                     0x8ce
+#define XK_identical                                   0x8cf
+#define XK_radical                                     0x8d6
+#define XK_includedin                                  0x8da
+#define XK_includes                                    0x8db
+#define XK_intersection                                0x8dc
+#define XK_union                                       0x8dd
+#define XK_logicaland                                  0x8de
+#define XK_logicalor                                   0x8df
+#define XK_partialderivative                           0x8ef
+#define XK_function                                    0x8f6
+#define XK_leftarrow                                   0x8fb
+#define XK_uparrow                                     0x8fc
+#define XK_rightarrow                                  0x8fd
+#define XK_downarrow                                   0x8fe
+#endif /* XK_TECHNICAL */
+
+/*
+ *  Special
+ *  Byte 3 = 9
+ */
+
+#ifdef XK_SPECIAL
+#define XK_blank                                       0x9df
+#define XK_soliddiamond                                0x9e0
+#define XK_checkerboard                                0x9e1
+#define XK_ht                                          0x9e2
+#define XK_ff                                          0x9e3
+#define XK_cr                                          0x9e4
+#define XK_lf                                          0x9e5
+#define XK_nl                                          0x9e8
+#define XK_vt                                          0x9e9
+#define XK_lowrightcorner                              0x9ea
+#define XK_uprightcorner                               0x9eb
+#define XK_upleftcorner                                0x9ec
+#define XK_lowleftcorner                               0x9ed
+#define XK_crossinglines                               0x9ee
+#define XK_horizlinescan1                              0x9ef
+#define XK_horizlinescan3                              0x9f0
+#define XK_horizlinescan5                              0x9f1
+#define XK_horizlinescan7                              0x9f2
+#define XK_horizlinescan9                              0x9f3
+#define XK_leftt                                       0x9f4
+#define XK_rightt                                      0x9f5
+#define XK_bott                                        0x9f6
+#define XK_topt                                        0x9f7
+#define XK_vertbar                                     0x9f8
+#endif /* XK_SPECIAL */
+
+/*
+ *  Publishing
+ *  Byte 3 = a
+ */
+
+#ifdef XK_PUBLISHING
+#define XK_emspace                                     0xaa1
+#define XK_enspace                                     0xaa2
+#define XK_em3space                                    0xaa3
+#define XK_em4space                                    0xaa4
+#define XK_digitspace                                  0xaa5
+#define XK_punctspace                                  0xaa6
+#define XK_thinspace                                   0xaa7
+#define XK_hairspace                                   0xaa8
+#define XK_emdash                                      0xaa9
+#define XK_endash                                      0xaaa
+#define XK_signifblank                                 0xaac
+#define XK_ellipsis                                    0xaae
+#define XK_doubbaselinedot                             0xaaf
+#define XK_onethird                                    0xab0
+#define XK_twothirds                                   0xab1
+#define XK_onefifth                                    0xab2
+#define XK_twofifths                                   0xab3
+#define XK_threefifths                                 0xab4
+#define XK_fourfifths                                  0xab5
+#define XK_onesixth                                    0xab6
+#define XK_fivesixths                                  0xab7
+#define XK_careof                                      0xab8
+#define XK_figdash                                     0xabb
+#define XK_leftanglebracket                            0xabc
+#define XK_decimalpoint                                0xabd
+#define XK_rightanglebracket                           0xabe
+#define XK_marker                                      0xabf
+#define XK_oneeighth                                   0xac3
+#define XK_threeeighths                                0xac4
+#define XK_fiveeighths                                 0xac5
+#define XK_seveneighths                                0xac6
+#define XK_trademark                                   0xac9
+#define XK_signaturemark                               0xaca
+#define XK_trademarkincircle                           0xacb
+#define XK_leftopentriangle                            0xacc
+#define XK_rightopentriangle                           0xacd
+#define XK_emopencircle                                0xace
+#define XK_emopenrectangle                             0xacf
+#define XK_leftsinglequotemark                         0xad0
+#define XK_rightsinglequotemark                        0xad1
+#define XK_leftdoublequotemark                         0xad2
+#define XK_rightdoublequotemark                        0xad3
+#define XK_prescription                                0xad4
+#define XK_minutes                                     0xad6
+#define XK_seconds                                     0xad7
+#define XK_latincross                                  0xad9
+#define XK_hexagram                                    0xada
+#define XK_filledrectbullet                            0xadb
+#define XK_filledlefttribullet                         0xadc
+#define XK_filledrighttribullet                        0xadd
+#define XK_emfilledcircle                              0xade
+#define XK_emfilledrect                                0xadf
+#define XK_enopencircbullet                            0xae0
+#define XK_enopensquarebullet                          0xae1
+#define XK_openrectbullet                              0xae2
+#define XK_opentribulletup                             0xae3
+#define XK_opentribulletdown                           0xae4
+#define XK_openstar                                    0xae5
+#define XK_enfilledcircbullet                          0xae6
+#define XK_enfilledsqbullet                            0xae7
+#define XK_filledtribulletup                           0xae8
+#define XK_filledtribulletdown                         0xae9
+#define XK_leftpointer                                 0xaea
+#define XK_rightpointer                                0xaeb
+#define XK_club                                        0xaec
+#define XK_diamond                                     0xaed
+#define XK_heart                                       0xaee
+#define XK_maltesecross                                0xaf0
+#define XK_dagger                                      0xaf1
+#define XK_doubledagger                                0xaf2
+#define XK_checkmark                                   0xaf3
+#define XK_ballotcross                                 0xaf4
+#define XK_musicalsharp                                0xaf5
+#define XK_musicalflat                                 0xaf6
+#define XK_malesymbol                                  0xaf7
+#define XK_femalesymbol                                0xaf8
+#define XK_telephone                                   0xaf9
+#define XK_telephonerecorder                           0xafa
+#define XK_phonographcopyright                         0xafb
+#define XK_caret                                       0xafc
+#define XK_singlelowquotemark                          0xafd
+#define XK_doublelowquotemark                          0xafe
+#define XK_cursor                                      0xaff
+#endif /* XK_PUBLISHING */
+
+/*
+ *  APL
+ *  Byte 3 = b
+ */
+
+#ifdef XK_APL
+#define XK_leftcaret                                   0xba3
+#define XK_rightcaret                                  0xba6
+#define XK_downcaret                                   0xba8
+#define XK_upcaret                                     0xba9
+#define XK_overbar                                     0xbc0
+#define XK_downtack                                    0xbc2
+#define XK_upshoe                                      0xbc3
+#define XK_downstile                                   0xbc4
+#define XK_underbar                                    0xbc6
+#define XK_jot                                         0xbca
+#define XK_quad                                        0xbcc
+#define XK_uptack                                      0xbce
+#define XK_circle                                      0xbcf
+#define XK_upstile                                     0xbd3
+#define XK_downshoe                                    0xbd6
+#define XK_rightshoe                                   0xbd8
+#define XK_leftshoe                                    0xbda
+#define XK_lefttack                                    0xbdc
+#define XK_righttack                                   0xbfc
+#endif /* XK_APL */
+
+/*
+ * Hebrew
+ * Byte 3 = c
+ */
+
+#ifdef XK_HEBREW
+#define XK_hebrew_doublelowline                        0xcdf
+#define XK_hebrew_aleph                                0xce0
+#define XK_hebrew_bet                                  0xce1
+#define XK_hebrew_beth                                 0xce1  /* deprecated */
+#define XK_hebrew_gimel                                0xce2
+#define XK_hebrew_gimmel                               0xce2  /* deprecated */
+#define XK_hebrew_dalet                                0xce3
+#define XK_hebrew_daleth                               0xce3  /* deprecated */
+#define XK_hebrew_he                                   0xce4
+#define XK_hebrew_waw                                  0xce5
+#define XK_hebrew_zain                                 0xce6
+#define XK_hebrew_zayin                                0xce6  /* deprecated */
+#define XK_hebrew_chet                                 0xce7
+#define XK_hebrew_het                                  0xce7  /* deprecated */
+#define XK_hebrew_tet                                  0xce8
+#define XK_hebrew_teth                                 0xce8  /* deprecated */
+#define XK_hebrew_yod                                  0xce9
+#define XK_hebrew_finalkaph                            0xcea
+#define XK_hebrew_kaph                                 0xceb
+#define XK_hebrew_lamed                                0xcec
+#define XK_hebrew_finalmem                             0xced
+#define XK_hebrew_mem                                  0xcee
+#define XK_hebrew_finalnun                             0xcef
+#define XK_hebrew_nun                                  0xcf0
+#define XK_hebrew_samech                               0xcf1
+#define XK_hebrew_samekh                               0xcf1  /* deprecated */
+#define XK_hebrew_ayin                                 0xcf2
+#define XK_hebrew_finalpe                              0xcf3
+#define XK_hebrew_pe                                   0xcf4
+#define XK_hebrew_finalzade                            0xcf5
+#define XK_hebrew_finalzadi                            0xcf5  /* deprecated */
+#define XK_hebrew_zade                                 0xcf6
+#define XK_hebrew_zadi                                 0xcf6  /* deprecated */
+#define XK_hebrew_qoph                                 0xcf7
+#define XK_hebrew_kuf                                  0xcf7  /* deprecated */
+#define XK_hebrew_resh                                 0xcf8
+#define XK_hebrew_shin                                 0xcf9
+#define XK_hebrew_taw                                  0xcfa
+#define XK_hebrew_taf                                  0xcfa  /* deprecated */
+#define XK_Hebrew_switch        0xFF7E  /* Alias for mode_switch */
+#endif /* XK_HEBREW */
+
+/*
+ * Thai
+ * Byte 3 = d
+ */
+
+#ifdef XK_THAI
+#define XK_Thai_kokai					0xda1
+#define XK_Thai_khokhai					0xda2
+#define XK_Thai_khokhuat				0xda3
+#define XK_Thai_khokhwai				0xda4
+#define XK_Thai_khokhon					0xda5
+#define XK_Thai_khorakhang			        0xda6  
+#define XK_Thai_ngongu					0xda7  
+#define XK_Thai_chochan					0xda8  
+#define XK_Thai_choching				0xda9   
+#define XK_Thai_chochang				0xdaa  
+#define XK_Thai_soso					0xdab
+#define XK_Thai_chochoe					0xdac
+#define XK_Thai_yoying					0xdad
+#define XK_Thai_dochada					0xdae
+#define XK_Thai_topatak					0xdaf
+#define XK_Thai_thothan					0xdb0
+#define XK_Thai_thonangmontho			        0xdb1
+#define XK_Thai_thophuthao			        0xdb2
+#define XK_Thai_nonen					0xdb3
+#define XK_Thai_dodek					0xdb4
+#define XK_Thai_totao					0xdb5
+#define XK_Thai_thothung				0xdb6
+#define XK_Thai_thothahan				0xdb7
+#define XK_Thai_thothong	 			0xdb8
+#define XK_Thai_nonu					0xdb9
+#define XK_Thai_bobaimai				0xdba
+#define XK_Thai_popla					0xdbb
+#define XK_Thai_phophung				0xdbc
+#define XK_Thai_fofa					0xdbd
+#define XK_Thai_phophan					0xdbe
+#define XK_Thai_fofan					0xdbf
+#define XK_Thai_phosamphao			        0xdc0
+#define XK_Thai_moma					0xdc1
+#define XK_Thai_yoyak					0xdc2
+#define XK_Thai_rorua					0xdc3
+#define XK_Thai_ru					0xdc4
+#define XK_Thai_loling					0xdc5
+#define XK_Thai_lu					0xdc6
+#define XK_Thai_wowaen					0xdc7
+#define XK_Thai_sosala					0xdc8
+#define XK_Thai_sorusi					0xdc9
+#define XK_Thai_sosua					0xdca
+#define XK_Thai_hohip					0xdcb
+#define XK_Thai_lochula					0xdcc
+#define XK_Thai_oang					0xdcd
+#define XK_Thai_honokhuk				0xdce
+#define XK_Thai_paiyannoi				0xdcf
+#define XK_Thai_saraa					0xdd0
+#define XK_Thai_maihanakat				0xdd1
+#define XK_Thai_saraaa					0xdd2
+#define XK_Thai_saraam					0xdd3
+#define XK_Thai_sarai					0xdd4   
+#define XK_Thai_saraii					0xdd5   
+#define XK_Thai_saraue					0xdd6    
+#define XK_Thai_sarauee					0xdd7    
+#define XK_Thai_sarau					0xdd8    
+#define XK_Thai_sarauu					0xdd9   
+#define XK_Thai_phinthu					0xdda
+#define XK_Thai_maihanakat_maitho   			0xdde
+#define XK_Thai_baht					0xddf
+#define XK_Thai_sarae					0xde0    
+#define XK_Thai_saraae					0xde1
+#define XK_Thai_sarao					0xde2
+#define XK_Thai_saraaimaimuan				0xde3   
+#define XK_Thai_saraaimaimalai				0xde4  
+#define XK_Thai_lakkhangyao				0xde5
+#define XK_Thai_maiyamok				0xde6
+#define XK_Thai_maitaikhu				0xde7
+#define XK_Thai_maiek					0xde8   
+#define XK_Thai_maitho					0xde9
+#define XK_Thai_maitri					0xdea
+#define XK_Thai_maichattawa				0xdeb
+#define XK_Thai_thanthakhat				0xdec
+#define XK_Thai_nikhahit				0xded
+#define XK_Thai_leksun					0xdf0 
+#define XK_Thai_leknung					0xdf1  
+#define XK_Thai_leksong					0xdf2 
+#define XK_Thai_leksam					0xdf3
+#define XK_Thai_leksi					0xdf4  
+#define XK_Thai_lekha					0xdf5  
+#define XK_Thai_lekhok					0xdf6  
+#define XK_Thai_lekchet					0xdf7  
+#define XK_Thai_lekpaet					0xdf8  
+#define XK_Thai_lekkao					0xdf9 
+#endif /* XK_THAI */
+
+/*
+ *   Korean
+ *   Byte 3 = e
+ */
+
+#ifdef XK_KOREAN
+
+#define XK_Hangul		0xff31    /* Hangul start/stop(toggle) */
+#define XK_Hangul_Start		0xff32    /* Hangul start */
+#define XK_Hangul_End		0xff33    /* Hangul end, English start */
+#define XK_Hangul_Hanja		0xff34    /* Start Hangul->Hanja Conversion */
+#define XK_Hangul_Jamo		0xff35    /* Hangul Jamo mode */
+#define XK_Hangul_Romaja	0xff36    /* Hangul Romaja mode */
+#define XK_Hangul_Codeinput	0xff37    /* Hangul code input mode */
+#define XK_Hangul_Jeonja	0xff38    /* Jeonja mode */
+#define XK_Hangul_Banja		0xff39    /* Banja mode */
+#define XK_Hangul_PreHanja	0xff3a    /* Pre Hanja conversion */
+#define XK_Hangul_PostHanja	0xff3b    /* Post Hanja conversion */
+#define XK_Hangul_SingleCandidate	0xff3c    /* Single candidate */
+#define XK_Hangul_MultipleCandidate	0xff3d    /* Multiple candidate */
+#define XK_Hangul_PreviousCandidate	0xff3e    /* Previous candidate */
+#define XK_Hangul_Special	0xff3f    /* Special symbols */
+#define XK_Hangul_switch	0xFF7E    /* Alias for mode_switch */
+
+/* Hangul Consonant Characters */
+#define XK_Hangul_Kiyeog				0xea1
+#define XK_Hangul_SsangKiyeog				0xea2
+#define XK_Hangul_KiyeogSios				0xea3
+#define XK_Hangul_Nieun					0xea4
+#define XK_Hangul_NieunJieuj				0xea5
+#define XK_Hangul_NieunHieuh				0xea6
+#define XK_Hangul_Dikeud				0xea7
+#define XK_Hangul_SsangDikeud				0xea8
+#define XK_Hangul_Rieul					0xea9
+#define XK_Hangul_RieulKiyeog				0xeaa
+#define XK_Hangul_RieulMieum				0xeab
+#define XK_Hangul_RieulPieub				0xeac
+#define XK_Hangul_RieulSios				0xead
+#define XK_Hangul_RieulTieut				0xeae
+#define XK_Hangul_RieulPhieuf				0xeaf
+#define XK_Hangul_RieulHieuh				0xeb0
+#define XK_Hangul_Mieum					0xeb1
+#define XK_Hangul_Pieub					0xeb2
+#define XK_Hangul_SsangPieub				0xeb3
+#define XK_Hangul_PieubSios				0xeb4
+#define XK_Hangul_Sios					0xeb5
+#define XK_Hangul_SsangSios				0xeb6
+#define XK_Hangul_Ieung					0xeb7
+#define XK_Hangul_Jieuj					0xeb8
+#define XK_Hangul_SsangJieuj				0xeb9
+#define XK_Hangul_Cieuc					0xeba
+#define XK_Hangul_Khieuq				0xebb
+#define XK_Hangul_Tieut					0xebc
+#define XK_Hangul_Phieuf				0xebd
+#define XK_Hangul_Hieuh					0xebe
+
+/* Hangul Vowel Characters */
+#define XK_Hangul_A					0xebf
+#define XK_Hangul_AE					0xec0
+#define XK_Hangul_YA					0xec1
+#define XK_Hangul_YAE					0xec2
+#define XK_Hangul_EO					0xec3
+#define XK_Hangul_E					0xec4
+#define XK_Hangul_YEO					0xec5
+#define XK_Hangul_YE					0xec6
+#define XK_Hangul_O					0xec7
+#define XK_Hangul_WA					0xec8
+#define XK_Hangul_WAE					0xec9
+#define XK_Hangul_OE					0xeca
+#define XK_Hangul_YO					0xecb
+#define XK_Hangul_U					0xecc
+#define XK_Hangul_WEO					0xecd
+#define XK_Hangul_WE					0xece
+#define XK_Hangul_WI					0xecf
+#define XK_Hangul_YU					0xed0
+#define XK_Hangul_EU					0xed1
+#define XK_Hangul_YI					0xed2
+#define XK_Hangul_I					0xed3
+
+/* Hangul syllable-final (JongSeong) Characters */
+#define XK_Hangul_J_Kiyeog				0xed4
+#define XK_Hangul_J_SsangKiyeog				0xed5
+#define XK_Hangul_J_KiyeogSios				0xed6
+#define XK_Hangul_J_Nieun				0xed7
+#define XK_Hangul_J_NieunJieuj				0xed8
+#define XK_Hangul_J_NieunHieuh				0xed9
+#define XK_Hangul_J_Dikeud				0xeda
+#define XK_Hangul_J_Rieul				0xedb
+#define XK_Hangul_J_RieulKiyeog				0xedc
+#define XK_Hangul_J_RieulMieum				0xedd
+#define XK_Hangul_J_RieulPieub				0xede
+#define XK_Hangul_J_RieulSios				0xedf
+#define XK_Hangul_J_RieulTieut				0xee0
+#define XK_Hangul_J_RieulPhieuf				0xee1
+#define XK_Hangul_J_RieulHieuh				0xee2
+#define XK_Hangul_J_Mieum				0xee3
+#define XK_Hangul_J_Pieub				0xee4
+#define XK_Hangul_J_PieubSios				0xee5
+#define XK_Hangul_J_Sios				0xee6
+#define XK_Hangul_J_SsangSios				0xee7
+#define XK_Hangul_J_Ieung				0xee8
+#define XK_Hangul_J_Jieuj				0xee9
+#define XK_Hangul_J_Cieuc				0xeea
+#define XK_Hangul_J_Khieuq				0xeeb
+#define XK_Hangul_J_Tieut				0xeec
+#define XK_Hangul_J_Phieuf				0xeed
+#define XK_Hangul_J_Hieuh				0xeee
+
+/* Ancient Hangul Consonant Characters */
+#define XK_Hangul_RieulYeorinHieuh			0xeef
+#define XK_Hangul_SunkyeongeumMieum			0xef0
+#define XK_Hangul_SunkyeongeumPieub			0xef1
+#define XK_Hangul_PanSios				0xef2
+#define XK_Hangul_KkogjiDalrinIeung			0xef3
+#define XK_Hangul_SunkyeongeumPhieuf			0xef4
+#define XK_Hangul_YeorinHieuh				0xef5
+
+/* Ancient Hangul Vowel Characters */
+#define XK_Hangul_AraeA					0xef6
+#define XK_Hangul_AraeAE				0xef7
+
+/* Ancient Hangul syllable-final (JongSeong) Characters */
+#define XK_Hangul_J_PanSios				0xef8
+#define XK_Hangul_J_KkogjiDalrinIeung			0xef9
+#define XK_Hangul_J_YeorinHieuh				0xefa
+
+/* Korean currency symbol */
+#define XK_Korean_Won					0xeff
+
+#endif /* XK_KOREAN */
+
+#ifdef XK_CURRENCY
+#define XK_EcuSign					0x20a0
+#define XK_ColonSign					0x20a1
+#define XK_CruzeiroSign					0x20a2
+#define XK_FFrancSign					0x20a3
+#define XK_LiraSign					0x20a4
+#define XK_MillSign					0x20a5
+#define XK_NairaSign					0x20a6
+#define XK_PesetaSign					0x20a7
+#define XK_RupeeSign					0x20a8
+#define XK_WonSign					0x20a9
+#define XK_NewSheqelSign				0x20aa
+#define XK_DongSign					0x20ab
+#define XK_EuroSign					0x20ac
+#endif
diff --git a/common/rfb/msgTypes.h b/common/rfb/msgTypes.h
new file mode 100644
index 00000000..f6f8d5cf
--- /dev/null
+++ b/common/rfb/msgTypes.h
@@ -0,0 +1,57 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#ifndef __RFB_MSGTYPES_H__
+#define __RFB_MSGTYPES_H__
+
+namespace rfb {
+  // server to client
+
+  const int msgTypeFramebufferUpdate = 0;
+  const int msgTypeSetColourMapEntries = 1;
+  const int msgTypeBell = 2;
+  const int msgTypeServerCutText = 3;
+
+  const int msgTypeFileListData = 130;
+  const int msgTypeFileDownloadData = 131;
+  const int msgTypeFileUploadCancel = 132;
+  const int msgTypeFileDownloadFailed = 133;
+  const int msgTypeFileDirSizeData = 134;
+  const int msgTypeFileLastRequestFailed = 135;
+
+  // client to server
+
+  const int msgTypeSetPixelFormat = 0;
+  const int msgTypeFixColourMapEntries = 1;
+  const int msgTypeSetEncodings = 2;
+  const int msgTypeFramebufferUpdateRequest = 3;
+  const int msgTypeKeyEvent = 4;
+  const int msgTypePointerEvent = 5;
+  const int msgTypeClientCutText = 6;
+
+  const int msgTypeFileListRequest = 130;
+  const int msgTypeFileDownloadRequest = 131;
+  const int msgTypeFileUploadRequest = 132;
+  const int msgTypeFileUploadData = 133;
+  const int msgTypeFileDownloadCancel = 134;
+  const int msgTypeFileUploadFailed = 135;
+  const int msgTypeFileCreateDirRequest = 136;
+  const int msgTypeFileDirSizeRequest = 137;
+  const int	msgTypeFileRenameRequest = 138;
+  const int msgTypeFileDeleteRequest = 139;
+}
+#endif
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new file mode 100644
index 00000000..aef5e43c
--- /dev/null
+++ b/common/rfb/rfb.dsp
@@ -0,0 +1,767 @@
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diff --git a/common/rfb/rreDecode.h b/common/rfb/rreDecode.h
new file mode 100644
index 00000000..1f5bdf8b
--- /dev/null
+++ b/common/rfb/rreDecode.h
@@ -0,0 +1,64 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// RRE decoding function.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+// EXTRA_ARGS         - optional extra arguments
+// FILL_RECT          - fill a rectangle with a single colour
+
+#include <rdr/InStream.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define READ_PIXEL CONCAT2E(readOpaque,BPP)
+#define RRE_DECODE CONCAT2E(rreDecode,BPP)
+
+void RRE_DECODE (const Rect& r, rdr::InStream* is
+#ifdef EXTRA_ARGS
+                 , EXTRA_ARGS
+#endif
+                 )
+{
+  int nSubrects = is->readU32();
+  PIXEL_T bg = is->READ_PIXEL();
+  FILL_RECT(r, bg);
+
+  for (int i = 0; i < nSubrects; i++) {
+    PIXEL_T pix = is->READ_PIXEL();
+    int x = is->readU16();
+    int y = is->readU16();
+    int w = is->readU16();
+    int h = is->readU16();
+    FILL_RECT(Rect(r.tl.x+x, r.tl.y+y, r.tl.x+x+w, r.tl.y+y+h), pix);
+  }
+}
+
+#undef PIXEL_T
+#undef READ_PIXEL
+#undef RRE_DECODE
+}
diff --git a/common/rfb/rreEncode.h b/common/rfb/rreEncode.h
new file mode 100644
index 00000000..3f834877
--- /dev/null
+++ b/common/rfb/rreEncode.h
@@ -0,0 +1,164 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// RRE encoding function.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+//
+// The data argument to RRE_ENCODE contains the pixel data, and it writes the
+// encoded version to the given OutStream.  If the encoded version exceeds w*h
+// it aborts and returns -1, otherwise it returns the number of subrectangles.
+//
+
+#include <rdr/OutStream.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define WRITE_PIXEL CONCAT2E(writeOpaque,BPP)
+#define RRE_ENCODE CONCAT2E(rreEncode,BPP)
+
+int RRE_ENCODE (PIXEL_T* data, int w, int h, rdr::OutStream* os, PIXEL_T bg);
+
+int RRE_ENCODE (void* data, int w, int h, rdr::OutStream* os)
+{
+  // Find the background colour - count occurrences of up to 4 different pixel
+  // values, and choose the one which occurs most often.
+
+  const int nCols = 4;
+  PIXEL_T pix[nCols];
+  int count[nCols] = { 0, };
+  PIXEL_T* ptr = (PIXEL_T*)data;
+  PIXEL_T* end = ptr + w*h;
+
+  while (ptr < end) {
+    int i;
+    for (i = 0; i < nCols; i++) {
+      if (count[i] == 0)
+        pix[i] = *ptr;
+
+      if (pix[i] == *ptr) {
+        count[i]++;
+        break;
+      }
+    }
+
+    if (i == nCols) break;
+    ptr++;
+  }
+  
+  int bg = 0;
+  for (int i = 1; i < nCols; i++)
+    if (count[i] > count[bg]) bg = i;
+
+  // Now call the function to do the encoding.
+
+  return RRE_ENCODE ((PIXEL_T*)data, w, h, os, pix[bg]);
+}
+
+int RRE_ENCODE (PIXEL_T* data, int w, int h, rdr::OutStream* os, PIXEL_T bg)
+{
+  int oldLen = os->length();
+  os->WRITE_PIXEL(bg);
+
+  int nSubrects = 0;
+
+  for (int y = 0; y < h; y++)
+  {
+    int x = 0;
+    while (x < w) {
+      if (*data == bg) {
+        x++;
+        data++;
+        continue;
+      }
+
+      // Find horizontal subrect first
+      PIXEL_T* ptr = data+1;
+      PIXEL_T* eol = data+w-x;
+      while (ptr < eol && *ptr == *data) ptr++;
+      int sw = ptr - data;
+
+      ptr = data + w;
+      int sh = 1;
+      while (sh < h-y) {
+        eol = ptr + sw;
+        while (ptr < eol)
+          if (*ptr++ != *data) goto endOfHorizSubrect;
+        ptr += w - sw;
+        sh++;
+      }
+    endOfHorizSubrect:
+
+      // Find vertical subrect
+      int vh;
+      for (vh = sh; vh < h-y; vh++)
+        if (data[vh*w] != *data) break;
+
+      if (vh != sh) {
+        ptr = data+1;
+        int vw;
+        for (vw = 1; vw < sw; vw++) {
+          for (int i = 0; i < vh; i++)
+            if (ptr[i*w] != *data) goto endOfVertSubrect;
+          ptr++;
+        }
+      endOfVertSubrect:
+
+        // If vertical subrect bigger than horizontal then use that.
+        if (sw*sh < vw*vh) {
+          sw = vw;
+          sh = vh;
+        }
+      }
+
+      nSubrects++;
+      os->WRITE_PIXEL(*data);
+      os->writeU16(x);
+      os->writeU16(y);
+      os->writeU16(sw);
+      os->writeU16(sh);
+      if (os->length() > oldLen + w*h) return -1;
+
+      ptr = data+w;
+      PIXEL_T* eor = data+w*sh;
+      while (ptr < eor) {
+        eol = ptr + sw;
+        while (ptr < eol) *ptr++ = bg;
+        ptr += w - sw;
+      }
+      x += sw;
+      data += sw;
+    }
+  }
+
+  return nSubrects;
+}
+
+#undef PIXEL_T
+#undef WRITE_PIXEL
+#undef RRE_ENCODE
+}
diff --git a/common/rfb/secTypes.cxx b/common/rfb/secTypes.cxx
new file mode 100644
index 00000000..830d8444
--- /dev/null
+++ b/common/rfb/secTypes.cxx
@@ -0,0 +1,73 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <string.h>
+#ifdef _WIN32
+#define strcasecmp _stricmp
+#endif
+#include <rfb/secTypes.h>
+#include <rfb/util.h>
+
+int rfb::secTypeNum(const char* name)
+{
+  if (strcasecmp(name, "None") == 0)       return secTypeNone;
+  if (strcasecmp(name, "VncAuth") == 0)    return secTypeVncAuth;
+  if (strcasecmp(name, "Tight") == 0)      return secTypeTight;
+  if (strcasecmp(name, "RA2") == 0)        return secTypeRA2;
+  if (strcasecmp(name, "RA2ne") == 0)      return secTypeRA2ne;
+  if (strcasecmp(name, "SSPI") == 0)       return secTypeSSPI;
+  if (strcasecmp(name, "SSPIne") == 0)       return secTypeSSPIne;
+  return secTypeInvalid;
+}
+
+const char* rfb::secTypeName(int num)
+{
+  switch (num) {
+  case secTypeNone:       return "None";
+  case secTypeVncAuth:    return "VncAuth";
+  case secTypeTight:      return "Tight";
+  case secTypeRA2:        return "RA2";
+  case secTypeRA2ne:      return "RA2ne";
+  case secTypeSSPI:       return "SSPI";
+  case secTypeSSPIne:     return "SSPIne";
+  default:                return "[unknown secType]";
+  }
+}
+
+bool rfb::secTypeEncrypts(int num)
+{
+  switch (num) {
+  case secTypeRA2:
+  case secTypeSSPI:
+    return true;
+  default:
+    return false;
+  }
+}
+
+std::list<int> rfb::parseSecTypes(const char* types_)
+{
+  std::list<int> result;
+  CharArray types(strDup(types_)), type;
+  while (types.buf) {
+    strSplit(types.buf, ',', &type.buf, &types.buf);
+    int typeNum = secTypeNum(type.buf);
+    if (typeNum != secTypeInvalid)
+      result.push_back(typeNum);
+  }
+  return result;
+}
diff --git a/common/rfb/secTypes.h b/common/rfb/secTypes.h
new file mode 100644
index 00000000..3cf783bd
--- /dev/null
+++ b/common/rfb/secTypes.h
@@ -0,0 +1,54 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// secTypes.h - constants for the various security types.
+//
+
+#ifndef __RFB_SECTYPES_H__
+#define __RFB_SECTYPES_H__
+
+#include <list>
+
+namespace rfb {
+  const int secTypeInvalid = 0;
+  const int secTypeNone    = 1;
+  const int secTypeVncAuth = 2;
+
+  const int secTypeRA2     = 5;
+  const int secTypeRA2ne   = 6;
+
+  const int secTypeSSPI    = 7;
+  const int secTypeSSPIne    = 8;
+
+  const int secTypeTight   = 16;
+  const int secTypeUltra   = 17;
+  const int secTypeTLS     = 18;
+
+  // result types
+
+  const int secResultOK = 0;
+  const int secResultFailed = 1;
+  const int secResultTooMany = 2; // deprecated
+
+  const char* secTypeName(int num);
+  int secTypeNum(const char* name);
+  bool secTypeEncrypts(int num);
+  std::list<int> parseSecTypes(const char* types);
+}
+
+#endif
diff --git a/common/rfb/tightDecode.h b/common/rfb/tightDecode.h
new file mode 100644
index 00000000..dd0c4d97
--- /dev/null
+++ b/common/rfb/tightDecode.h
@@ -0,0 +1,412 @@
+/* Copyright (C) 2000-2003 Constantin Kaplinsky.  All Rights Reserved.
+ * Copyright (C) 2004-2005 Cendio AB. All rights reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// Tight decoding functions.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+// EXTRA_ARGS         - optional extra arguments
+// FILL_RECT          - fill a rectangle with a single color
+// IMAGE_RECT         - draw a rectangle of pixel data from a buffer
+
+#include <rdr/InStream.h>
+#include <rdr/ZlibInStream.h>
+#include <rfb/Exception.h>
+#include <assert.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define READ_PIXEL CONCAT2E(readOpaque,BPP)
+#define TIGHT_DECODE CONCAT2E(tightDecode,BPP)
+
+#define TIGHT_MIN_TO_COMPRESS 12
+static bool DecompressJpegRect(const Rect& r, rdr::InStream* is,
+			       PIXEL_T* buf, CMsgHandler* handler);
+static void FilterGradient(const Rect& r, rdr::InStream* is, int dataSize,
+			   PIXEL_T* buf, CMsgHandler* handler);
+#if BPP == 32
+static void FilterGradient24(const Rect& r, rdr::InStream* is, int dataSize,
+			     PIXEL_T* buf, CMsgHandler* handler);
+#endif
+
+// Main function implementing Tight decoder
+
+void TIGHT_DECODE (const Rect& r, rdr::InStream* is,
+                   rdr::ZlibInStream zis[], PIXEL_T* buf
+#ifdef EXTRA_ARGS
+                      , EXTRA_ARGS
+#endif
+                      )
+{
+  rdr::U8 *bytebuf = (rdr::U8*) buf;
+  bool cutZeros = false;
+  const rfb::PixelFormat& myFormat = handler->cp.pf();
+#if BPP == 32
+  if (myFormat.depth == 24 && myFormat.redMax == 0xFF &&
+      myFormat.greenMax == 0xFF && myFormat.blueMax == 0xFF) {
+    cutZeros = true;
+  } 
+#endif
+
+  rdr::U8 comp_ctl = is->readU8();
+
+  // Flush zlib streams if we are told by the server to do so.
+  for (int i = 0; i < 4; i++) {
+    if (comp_ctl & 1) {
+      zis[i].reset();
+    }
+    comp_ctl >>= 1;
+  }
+
+  // "Fill" compression type.
+  if (comp_ctl == rfbTightFill) {
+    PIXEL_T pix;
+    if (cutZeros) {
+      is->readBytes(bytebuf, 3);
+      pix = RGB24_TO_PIXEL32(bytebuf[0], bytebuf[1], bytebuf[2]);
+    } else {
+      pix = is->READ_PIXEL();
+    }
+    FILL_RECT(r, pix);
+    return;
+  }
+
+  // "JPEG" compression type.
+  if (comp_ctl == rfbTightJpeg) {
+    DecompressJpegRect(r, is, buf, handler);
+    return;
+  }
+
+  // Quit on unsupported compression type.
+  if (comp_ctl > rfbTightMaxSubencoding) {
+    throw Exception("TightDecoder: bad subencoding value received");
+    return;
+  }
+
+  // "Basic" compression type.
+  int palSize = 0;
+  static PIXEL_T palette[256];
+  bool useGradient = false;
+
+  if ((comp_ctl & rfbTightExplicitFilter) != 0) {
+    rdr::U8 filterId = is->readU8();
+
+    switch (filterId) {
+    case rfbTightFilterPalette: 
+      palSize = is->readU8() + 1;
+      if (cutZeros) {
+	rdr::U8 *tightPalette = (rdr::U8*) palette;
+	is->readBytes(tightPalette, palSize*3);
+	for (int i = palSize - 1; i >= 0; i--) {
+	  palette[i] = RGB24_TO_PIXEL32(tightPalette[i*3],
+					tightPalette[i*3+1],
+					tightPalette[i*3+2]);
+        }
+      } else {
+	for (int i = 0; i < palSize; i++)
+	  palette[i] = is->READ_PIXEL();
+      }
+      break;
+    case rfbTightFilterGradient: 
+      useGradient = true;
+      break;
+    case rfbTightFilterCopy:
+      break;
+    default:
+      throw Exception("TightDecoder: unknown filter code received");
+      return;
+    }
+  }
+
+  int bppp = BPP;
+  if (palSize != 0) {
+    bppp = (palSize <= 2) ? 1 : 8;
+  } else if (cutZeros) {
+    bppp = 24;
+  }
+
+  // Determine if the data should be decompressed or just copied.
+  int rowSize = (r.width() * bppp + 7) / 8;
+  int dataSize = r.height() * rowSize;
+  int streamId = -1;
+  rdr::InStream *input;
+  if (dataSize < TIGHT_MIN_TO_COMPRESS) {
+    input = is;
+  } else {
+    int length = is->readCompactLength();
+    streamId = comp_ctl & 0x03;
+    zis[streamId].setUnderlying(is, length);
+    input = &zis[streamId];
+  }
+
+  if (palSize == 0) {
+    // Truecolor data
+    if (useGradient) {
+#if BPP == 32
+      if (cutZeros) {
+	FilterGradient24(r, input, dataSize, buf, handler);
+      } else 
+#endif
+	{
+	  FilterGradient(r, input, dataSize, buf, handler);
+	}
+    } else {
+      input->readBytes(buf, dataSize); 
+      if (cutZeros) {
+	for (int p = r.height() * r.width() - 1; p >= 0; p--) {
+	  buf[p] = RGB24_TO_PIXEL32(bytebuf[p*3],
+				    bytebuf[p*3+1],
+				    bytebuf[p*3+2]);
+	}
+      }
+    }
+  } else {
+    int x, y, b, w;
+    PIXEL_T *ptr = buf;
+    rdr::U8 bits;
+    if (palSize <= 2) {
+      // 2-color palette
+      w = (r.width() + 7) / 8;
+      for (y = 0; y < r.height(); y++) {
+        for (x = 0; x < r.width() / 8; x++) {
+          bits = input->readU8();
+          for (b = 7; b >= 0; b--) {
+            *ptr++ = palette[bits >> b & 1];
+	  }
+        }
+        if (r.width() % 8 != 0) {
+          bits = input->readU8();
+          for (b = 7; b >= 8 - r.width() % 8; b--) {
+            *ptr++ = palette[bits >> b & 1];
+          }
+        }
+      }
+    } else {
+      // 256-color palette
+      for (y = 0; y < r.height(); y++) {
+        for (x = 0; x < r.width(); x++) {
+          *ptr++ = palette[input->readU8()];
+	}
+      }
+    }
+  }
+
+  IMAGE_RECT(r, buf);
+
+  if (streamId != -1) {
+    zis[streamId].reset();
+  }
+}
+
+static bool
+DecompressJpegRect(const Rect& r, rdr::InStream* is,
+		   PIXEL_T* buf, CMsgHandler* handler)
+{
+  struct jpeg_decompress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+  PIXEL_T *pixelPtr = buf;
+  static rdr::U8 scanline_buffer[TIGHT_MAX_WIDTH*3];
+  JSAMPROW scanline = scanline_buffer;
+
+  // Read length
+  int compressedLen = is->readCompactLength();
+  if (compressedLen <= 0) {
+      throw Exception("Incorrect data received from the server.\n");
+  }
+
+  // Allocate netbuf and read in data
+  rdr::U8* netbuf = new rdr::U8[compressedLen];
+  if (!netbuf) {
+    throw Exception("rfb::tightDecode unable to allocate buffer");
+  }
+  is->readBytes(netbuf, compressedLen);
+
+  // Set up JPEG decompression
+  cinfo.err = jpeg_std_error(&jerr);
+  jpeg_create_decompress(&cinfo);
+  JpegSetSrcManager(&cinfo, (char*)netbuf, compressedLen);
+  jpeg_read_header(&cinfo, TRUE);
+  cinfo.out_color_space = JCS_RGB;
+
+  jpeg_start_decompress(&cinfo);
+  if (cinfo.output_width != (unsigned)r.width() || cinfo.output_height != (unsigned)r.height() ||
+      cinfo.output_components != 3) {
+      jpeg_destroy_decompress(&cinfo);
+      throw Exception("Tight Encoding: Wrong JPEG data received.\n");
+  }
+
+  // Decompress
+  const rfb::PixelFormat& myFormat = handler->cp.pf();
+  while (cinfo.output_scanline < cinfo.output_height) {
+    jpeg_read_scanlines(&cinfo, &scanline, 1);
+    if (jpegError) {
+      break;
+    }
+
+    for (int dx = 0; dx < r.width(); dx++) {
+      *pixelPtr++ = 
+	RGB24_TO_PIXEL(scanline[dx*3], scanline[dx*3+1], scanline[dx*3+2]);
+    }
+  }
+
+  IMAGE_RECT(r, buf);
+
+  if (!jpegError) {
+    jpeg_finish_decompress(&cinfo);
+  }
+
+  jpeg_destroy_decompress(&cinfo);
+
+  delete [] netbuf;
+
+  return !jpegError;
+}
+
+#if BPP == 32
+
+static void
+FilterGradient24(const Rect& r, rdr::InStream* is, int dataSize,
+		 PIXEL_T* buf, CMsgHandler* handler)
+{
+  int x, y, c;
+  static rdr::U8 prevRow[TIGHT_MAX_WIDTH*3];
+  static rdr::U8 thisRow[TIGHT_MAX_WIDTH*3];
+  rdr::U8 pix[3]; 
+  int est[3]; 
+
+  memset(prevRow, 0, sizeof(prevRow));
+
+  // Allocate netbuf and read in data
+  rdr::U8 *netbuf = new rdr::U8[dataSize];
+  if (!netbuf) {
+    throw Exception("rfb::tightDecode unable to allocate buffer");
+  }
+  is->readBytes(netbuf, dataSize);
+
+  // Set up shortcut variables
+  const rfb::PixelFormat& myFormat = handler->cp.pf();
+  int rectHeight = r.height();
+  int rectWidth = r.width();
+
+  for (y = 0; y < rectHeight; y++) {
+    /* First pixel in a row */
+    for (c = 0; c < 3; c++) {
+      pix[c] = netbuf[y*rectWidth*3+c] + prevRow[c];
+      thisRow[c] = pix[c];
+    }
+    buf[y*rectWidth] = RGB24_TO_PIXEL32(pix[0], pix[1], pix[2]);
+
+    /* Remaining pixels of a row */
+    for (x = 1; x < rectWidth; x++) {
+      for (c = 0; c < 3; c++) {
+	est[c] = prevRow[x*3+c] + pix[c] - prevRow[(x-1)*3+c];
+	if (est[c] > 0xff) {
+	  est[c] = 0xff;
+	} else if (est[c] < 0) {
+	  est[c] = 0;
+	}
+	pix[c] = netbuf[(y*rectWidth+x)*3+c] + est[c];
+	thisRow[x*3+c] = pix[c];
+      }
+      buf[y*rectWidth+x] = RGB24_TO_PIXEL32(pix[0], pix[1], pix[2]);
+    }
+
+    memcpy(prevRow, thisRow, sizeof(prevRow));
+  }
+
+  delete [] netbuf;
+}
+
+#endif
+
+static void
+FilterGradient(const Rect& r, rdr::InStream* is, int dataSize,
+	       PIXEL_T* buf, CMsgHandler* handler)
+{
+  int x, y, c;
+  static rdr::U8 prevRow[TIGHT_MAX_WIDTH*sizeof(PIXEL_T)];
+  static rdr::U8 thisRow[TIGHT_MAX_WIDTH*sizeof(PIXEL_T)];
+  int pix[3]; 
+  int max[3]; 
+  int shift[3]; 
+  int est[3]; 
+
+  memset(prevRow, 0, sizeof(prevRow));
+
+  // Allocate netbuf and read in data
+  PIXEL_T *netbuf = (PIXEL_T*)new rdr::U8[dataSize];
+  if (!netbuf) {
+    throw Exception("rfb::tightDecode unable to allocate buffer");
+  }
+  is->readBytes(netbuf, dataSize);
+
+  // Set up shortcut variables
+  const rfb::PixelFormat& myFormat = handler->cp.pf();
+  max[0] = myFormat.redMax; 
+  max[1] = myFormat.greenMax; 
+  max[2] = myFormat.blueMax; 
+  shift[0] = myFormat.redShift; 
+  shift[1] = myFormat.greenShift; 
+  shift[2] = myFormat.blueShift; 
+  int rectHeight = r.height();
+  int rectWidth = r.width();
+
+  for (y = 0; y < rectHeight; y++) {
+    /* First pixel in a row */
+    for (c = 0; c < 3; c++) {
+      pix[c] = (netbuf[y*rectWidth] >> shift[c]) + prevRow[c] & max[c];
+      thisRow[c] = pix[c];
+    }
+    buf[y*rectWidth] = RGB_TO_PIXEL(pix[0], pix[1], pix[2]);
+
+    /* Remaining pixels of a row */
+    for (x = 1; x < rectWidth; x++) {
+      for (c = 0; c < 3; c++) {
+	est[c] = prevRow[x*3+c] + pix[c] - prevRow[(x-1)*3+c];
+	if (est[c] > max[c]) {
+	  est[c] = max[c];
+	} else if (est[c] < 0) {
+	  est[c] = 0;
+	}
+	pix[c] = (netbuf[y*rectWidth+x] >> shift[c]) + est[c] & max[c];
+	thisRow[x*3+c] = pix[c];
+      }
+      buf[y*rectWidth+x] = RGB_TO_PIXEL(pix[0], pix[1], pix[2]);
+    }
+
+    memcpy(prevRow, thisRow, sizeof(prevRow));
+  }
+
+  delete [] netbuf;
+}
+
+#undef TIGHT_MIN_TO_COMPRESS
+#undef TIGHT_DECODE
+#undef READ_PIXEL
+#undef PIXEL_T
+}
diff --git a/common/rfb/tightEncode.h b/common/rfb/tightEncode.h
new file mode 100644
index 00000000..71f076e6
--- /dev/null
+++ b/common/rfb/tightEncode.h
@@ -0,0 +1,720 @@
+/* Copyright (C) 2000-2003 Constantin Kaplinsky.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// tightEncode.h - Tight encoding function.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+// EXTRA_ARGS         - optional extra arguments
+// GET_IMAGE_INTO_BUF - gets a rectangle of pixel data into a buffer
+//
+
+#include <rdr/OutStream.h>
+#include <rdr/ZlibOutStream.h>
+#include <assert.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define WRITE_PIXEL CONCAT2E(writeOpaque,BPP)
+#define TIGHT_ENCODE CONCAT2E(tightEncode,BPP)
+#define SWAP_PIXEL CONCAT2E(SWAP,BPP)
+#define HASH_FUNCTION CONCAT2E(HASH_FUNC,BPP)
+#define PACK_PIXELS CONCAT2E(packPixels,BPP)
+#define DETECT_SMOOTH_IMAGE CONCAT2E(detectSmoothImage,BPP)
+#define ENCODE_SOLID_RECT CONCAT2E(encodeSolidRect,BPP)
+#define ENCODE_FULLCOLOR_RECT CONCAT2E(encodeFullColorRect,BPP)
+#define ENCODE_MONO_RECT CONCAT2E(encodeMonoRect,BPP)
+#define ENCODE_INDEXED_RECT CONCAT2E(encodeIndexedRect,BPP)
+#define PREPARE_JPEG_ROW CONCAT2E(prepareJpegRow,BPP)
+#define ENCODE_JPEG_RECT CONCAT2E(encodeJpegRect,BPP)
+#define FILL_PALETTE CONCAT2E(fillPalette,BPP)
+
+#ifndef TIGHT_ONCE
+#define TIGHT_ONCE
+
+//
+// C-style structures to store palette entries and compression paramentes.
+// Such code probably should be converted into C++ classes.
+//
+
+struct TIGHT_COLOR_LIST {
+  TIGHT_COLOR_LIST *next;
+  int idx;
+  rdr::U32 rgb;
+};
+
+struct TIGHT_PALETTE_ENTRY {
+  TIGHT_COLOR_LIST *listNode;
+  int numPixels;
+};
+
+struct TIGHT_PALETTE {
+  TIGHT_PALETTE_ENTRY entry[256];
+  TIGHT_COLOR_LIST *hash[256];
+  TIGHT_COLOR_LIST list[256];
+};
+
+// FIXME: Is it really a good idea to use static variables for this?
+static int s_endianMismatch;      // local/remote formats differ in byte order
+static bool s_pack24;             // use 24-bit packing for 32-bit pixels
+static int s_rs, s_gs, s_bs;      // shifts for 24-bit pixel conversion
+
+// FIXME: Make a separate class for palette operations.
+static int s_palMaxColors, s_palNumColors;
+static rdr::U32 s_monoBackground, s_monoForeground;
+static TIGHT_PALETTE s_palette;
+
+//
+// Swapping bytes in pixels.
+// FIXME: Use a sort of ImageGetter that does not convert pixel format?
+//
+
+#ifndef SWAP16
+#define SWAP16(n) ((((n) & 0xff) << 8) | (((n) >> 8) & 0xff))
+#endif
+#ifndef SWAP32
+#define SWAP32(n) (((n) >> 24) | (((n) & 0x00ff0000) >> 8) | \
+                   (((n) & 0x0000ff00) << 8) | ((n) << 24))
+#endif
+
+//
+// Functions to operate on palette structures.
+//
+
+#define HASH_FUNC16(rgb) ((int)(((rgb >> 8) + rgb) & 0xFF))
+#define HASH_FUNC32(rgb) ((int)(((rgb >> 16) + (rgb >> 8)) & 0xFF))
+
+static void paletteReset(void)
+{
+  s_palNumColors = 0;
+  memset(s_palette.hash, 0, 256 * sizeof(TIGHT_COLOR_LIST *));
+}
+
+static int paletteInsert(rdr::U32 rgb, int numPixels, int bpp)
+{
+  TIGHT_COLOR_LIST *pnode;
+  TIGHT_COLOR_LIST *prev_pnode = NULL;
+  int hash_key, idx, new_idx, count;
+
+  hash_key = (bpp == 16) ? HASH_FUNC16(rgb) : HASH_FUNC32(rgb);
+
+  pnode = s_palette.hash[hash_key];
+
+  while (pnode != NULL) {
+    if (pnode->rgb == rgb) {
+      // Such palette entry already exists.
+      new_idx = idx = pnode->idx;
+      count = s_palette.entry[idx].numPixels + numPixels;
+      if (new_idx && s_palette.entry[new_idx-1].numPixels < count) {
+        do {
+          s_palette.entry[new_idx] = s_palette.entry[new_idx-1];
+          s_palette.entry[new_idx].listNode->idx = new_idx;
+          new_idx--;
+        }
+        while (new_idx &&
+          s_palette.entry[new_idx-1].numPixels < count);
+        s_palette.entry[new_idx].listNode = pnode;
+        pnode->idx = new_idx;
+      }
+      s_palette.entry[new_idx].numPixels = count;
+      return s_palNumColors;
+    }
+    prev_pnode = pnode;
+    pnode = pnode->next;
+  }
+
+  // Check if palette is full.
+  if ( s_palNumColors == 256 || s_palNumColors == s_palMaxColors ) {
+    s_palNumColors = 0;
+    return 0;
+  }
+
+  // Move palette entries with lesser pixel counts.
+  for ( idx = s_palNumColors;
+  idx > 0 && s_palette.entry[idx-1].numPixels < numPixels;
+  idx-- ) {
+    s_palette.entry[idx] = s_palette.entry[idx-1];
+    s_palette.entry[idx].listNode->idx = idx;
+  }
+
+  // Add new palette entry into the freed slot.
+  pnode = &s_palette.list[s_palNumColors];
+  if (prev_pnode != NULL) {
+    prev_pnode->next = pnode;
+  } else {
+    s_palette.hash[hash_key] = pnode;
+  }
+  pnode->next = NULL;
+  pnode->idx = idx;
+  pnode->rgb = rgb;
+  s_palette.entry[idx].listNode = pnode;
+  s_palette.entry[idx].numPixels = numPixels;
+
+  return (++s_palNumColors);
+}
+
+//
+// Compress the data (but do not perform actual compression if the data
+// size is less than TIGHT_MIN_TO_COMPRESS bytes.
+//
+
+static void compressData(rdr::OutStream *os, rdr::ZlibOutStream *zos,
+                         const void *buf, unsigned int length, int zlibLevel)
+{
+  if (length < TIGHT_MIN_TO_COMPRESS) {
+    os->writeBytes(buf, length);
+  } else {
+    // FIXME: Using a temporary MemOutStream may be not efficient.
+    //        Maybe use the same static object used in the JPEG coder?
+    rdr::MemOutStream mem_os;
+    zos->setUnderlying(&mem_os);
+    zos->setCompressionLevel(zlibLevel);
+    zos->writeBytes(buf, length);
+    zos->flush();
+    os->writeCompactLength(mem_os.length());
+    os->writeBytes(mem_os.data(), mem_os.length());
+  }
+}
+
+//
+// Destination manager implementation for the JPEG library.
+// FIXME: Implement JPEG compression in new rdr::JpegOutStream class.
+//
+
+// FIXME: Keeping a MemOutStream instance may consume too much space.
+rdr::MemOutStream s_jpeg_os;
+
+static struct jpeg_destination_mgr s_jpegDstManager;
+static JOCTET *s_jpegDstBuffer;
+static size_t s_jpegDstBufferLen;
+
+static void
+JpegInitDestination(j_compress_ptr cinfo)
+{
+  s_jpeg_os.clear();
+  s_jpegDstManager.next_output_byte = s_jpegDstBuffer;
+  s_jpegDstManager.free_in_buffer = s_jpegDstBufferLen;
+}
+
+static boolean
+JpegEmptyOutputBuffer(j_compress_ptr cinfo)
+{
+  s_jpeg_os.writeBytes(s_jpegDstBuffer, s_jpegDstBufferLen);
+  s_jpegDstManager.next_output_byte = s_jpegDstBuffer;
+  s_jpegDstManager.free_in_buffer = s_jpegDstBufferLen;
+
+  return TRUE;
+}
+
+static void
+JpegTermDestination(j_compress_ptr cinfo)
+{
+  int dataLen = s_jpegDstBufferLen - s_jpegDstManager.free_in_buffer;
+  s_jpeg_os.writeBytes(s_jpegDstBuffer, dataLen);
+}
+
+static void
+JpegSetDstManager(j_compress_ptr cinfo, JOCTET *buf, size_t buflen)
+{
+  s_jpegDstBuffer = buf;
+  s_jpegDstBufferLen = buflen;
+  s_jpegDstManager.init_destination = JpegInitDestination;
+  s_jpegDstManager.empty_output_buffer = JpegEmptyOutputBuffer;
+  s_jpegDstManager.term_destination = JpegTermDestination;
+  cinfo->dest = &s_jpegDstManager;
+}
+
+#endif  // #ifndef TIGHT_ONCE
+
+static void ENCODE_SOLID_RECT     (rdr::OutStream *os,
+                                   PIXEL_T *buf);
+static void ENCODE_FULLCOLOR_RECT (rdr::OutStream *os, rdr::ZlibOutStream zos[4],
+                                   PIXEL_T *buf, const Rect& r);
+static void ENCODE_MONO_RECT      (rdr::OutStream *os, rdr::ZlibOutStream zos[4],
+                                   PIXEL_T *buf, const Rect& r);
+#if (BPP != 8)
+static void ENCODE_INDEXED_RECT   (rdr::OutStream *os, rdr::ZlibOutStream zos[4],
+                                   PIXEL_T *buf, const Rect& r);
+static void ENCODE_JPEG_RECT      (rdr::OutStream *os,
+                                   PIXEL_T *buf, const PixelFormat& pf, const Rect& r);
+#endif
+
+static void FILL_PALETTE (PIXEL_T *data, int count);
+
+//
+// Convert 32-bit color samples into 24-bit colors, in place.
+// Performs packing only when redMax, greenMax and blueMax are all 255.
+// Color components are assumed to be byte-aligned.
+//
+
+static inline unsigned int PACK_PIXELS (PIXEL_T *buf, unsigned int count)
+{
+#if (BPP != 32)
+  return count * sizeof(PIXEL_T);
+#else
+  if (!s_pack24)
+    return count * sizeof(PIXEL_T);
+
+  rdr::U32 pix;
+  rdr::U8 *dst = (rdr::U8 *)buf;
+  for (unsigned int i = 0; i < count; i++) {
+    pix = *buf++;
+    *dst++ = (rdr::U8)(pix >> s_rs);
+    *dst++ = (rdr::U8)(pix >> s_gs);
+    *dst++ = (rdr::U8)(pix >> s_bs);
+  }
+  return count * 3;
+#endif
+}
+
+//
+// Function to guess if a given rectangle is suitable for JPEG compression.
+// Returns true is it looks like a good data for JPEG, false otherwise.
+//
+// FIXME: Scan the image and determine is it really good for JPEG.
+//
+
+#if (BPP != 8)
+static bool DETECT_SMOOTH_IMAGE (PIXEL_T *buf, const Rect& r)
+{
+  if (r.width() < TIGHT_DETECT_MIN_WIDTH ||
+      r.height() < TIGHT_DETECT_MIN_HEIGHT ||
+      r.area() < TIGHT_JPEG_MIN_RECT_SIZE ||
+      s_pjconf == NULL)
+    return 0;
+
+  return 1;
+}
+#endif
+
+// FIXME: Split rectangles into smaller ones!
+// FIXME: Compare encoder code with 1.3 before the final version.
+
+//
+// Main function of the Tight encoder
+//
+
+void TIGHT_ENCODE (const Rect& r, rdr::OutStream *os,
+                  rdr::ZlibOutStream zos[4], void* buf, ConnParams* cp
+#ifdef EXTRA_ARGS
+                  , EXTRA_ARGS
+#endif
+                  )
+{
+  const PixelFormat& pf = cp->pf();
+  GET_IMAGE_INTO_BUF(r, buf);
+  PIXEL_T* pixels = (PIXEL_T*)buf;
+
+#if (BPP != 8)
+  union {
+    rdr::U32 value32;
+    rdr::U8 test;
+  } littleEndian;
+  littleEndian.value32 = 1;
+  s_endianMismatch = (littleEndian.test != !pf.bigEndian);
+#endif
+
+#if (BPP == 32)
+  // Check if it's necessary to pack 24-bit pixels, and
+  // compute appropriate shift values if necessary.
+  s_pack24 = (pf.depth == 24 && pf.redMax == 0xFF &&
+              pf.greenMax == 0xFF && pf.blueMax == 0xFF);
+  if (s_pack24) {
+    if (!s_endianMismatch) {
+      s_rs = pf.redShift;
+      s_gs = pf.greenShift;
+      s_bs = pf.blueShift;
+    } else {
+      s_rs = 24 - pf.redShift;
+      s_gs = 24 - pf.greenShift;
+      s_bs = 24 - pf.blueShift;
+    }
+  }
+#endif
+
+  s_palMaxColors = r.area() / s_pconf->idxMaxColorsDivisor;
+  if (s_palMaxColors < 2 && r.area() >= s_pconf->monoMinRectSize) {
+    s_palMaxColors = 2;
+  }
+  // FIXME: Temporary limitation for switching to JPEG earlier.
+  if (s_palMaxColors > 96 && s_pjconf != NULL) {
+    s_palMaxColors = 96;
+  }
+
+  FILL_PALETTE(pixels, r.area());
+
+  switch (s_palNumColors) {
+  case 0:
+    // Truecolor image
+#if (BPP != 8)
+    if (s_pjconf != NULL && DETECT_SMOOTH_IMAGE(pixels, r)) {
+      ENCODE_JPEG_RECT(os, pixels, pf, r);
+      break;
+    }
+#endif
+    ENCODE_FULLCOLOR_RECT(os, zos, pixels, r);
+    break;
+  case 1:
+    // Solid rectangle
+    ENCODE_SOLID_RECT(os, pixels);
+    break;
+  case 2:
+    // Two-color rectangle
+    ENCODE_MONO_RECT(os, zos, pixels, r);
+    break;
+#if (BPP != 8)
+  default:
+    // Up to 256 different colors
+    ENCODE_INDEXED_RECT(os, zos, pixels, r);
+#endif
+  }
+}
+
+//
+// Subencoding implementations.
+//
+
+static void ENCODE_SOLID_RECT (rdr::OutStream *os, PIXEL_T *buf)
+{
+  os->writeU8(0x08 << 4);
+
+  int length = PACK_PIXELS(buf, 1);
+  os->writeBytes(buf, length);
+}
+
+static void ENCODE_FULLCOLOR_RECT (rdr::OutStream *os, rdr::ZlibOutStream zos[4],
+                                   PIXEL_T *buf, const Rect& r)
+{
+  const int streamId = 0;
+  os->writeU8(streamId << 4);
+
+  int length = PACK_PIXELS(buf, r.area());
+  compressData(os, &zos[streamId], buf, length, s_pconf->rawZlibLevel);
+}
+
+static void ENCODE_MONO_RECT (rdr::OutStream *os, rdr::ZlibOutStream zos[4],
+                              PIXEL_T *buf, const Rect& r)
+{
+  const int streamId = 1;
+  os->writeU8((streamId | 0x04) << 4);
+  os->writeU8(0x01);
+
+  // Write the palette
+  PIXEL_T pal[2] = { (PIXEL_T)s_monoBackground, (PIXEL_T)s_monoForeground };
+  os->writeU8(1);
+  os->writeBytes(pal, PACK_PIXELS(pal, 2));
+
+  // Encode the data in-place
+  PIXEL_T *src = buf;
+  rdr::U8 *dst = (rdr::U8 *)buf;
+  int w = r.width();
+  int h = r.height();
+  PIXEL_T bg;
+  unsigned int value, mask;
+  int aligned_width;
+  int x, y, bg_bits;
+
+  bg = (PIXEL_T) s_monoBackground;
+  aligned_width = w - w % 8;
+
+  for (y = 0; y < h; y++) {
+    for (x = 0; x < aligned_width; x += 8) {
+      for (bg_bits = 0; bg_bits < 8; bg_bits++) {
+        if (*src++ != bg)
+          break;
+      }
+      if (bg_bits == 8) {
+        *dst++ = 0;
+        continue;
+      }
+      mask = 0x80 >> bg_bits;
+      value = mask;
+      for (bg_bits++; bg_bits < 8; bg_bits++) {
+        mask >>= 1;
+        if (*src++ != bg) {
+          value |= mask;
+        }
+      }
+      *dst++ = (rdr::U8)value;
+    }
+
+    mask = 0x80;
+    value = 0;
+    if (x >= w)
+      continue;
+
+    for (; x < w; x++) {
+      if (*src++ != bg) {
+        value |= mask;
+      }
+      mask >>= 1;
+    }
+    *dst++ = (rdr::U8)value;
+  }
+
+  // Write the data
+  int length = (w + 7) / 8;
+  length *= h;
+  compressData(os, &zos[streamId], buf, length, s_pconf->monoZlibLevel);
+}
+
+#if (BPP != 8)
+static void ENCODE_INDEXED_RECT (rdr::OutStream *os, rdr::ZlibOutStream zos[4],
+                                 PIXEL_T *buf, const Rect& r)
+{
+  const int streamId = 2;
+  os->writeU8((streamId | 0x04) << 4);
+  os->writeU8(0x01);
+
+  // Write the palette
+  {
+    PIXEL_T pal[256];
+    for (int i = 0; i < s_palNumColors; i++)
+      pal[i] = (PIXEL_T)s_palette.entry[i].listNode->rgb;
+    os->writeU8((rdr::U8)(s_palNumColors - 1));
+    os->writeBytes(pal, PACK_PIXELS(pal, s_palNumColors));
+  }
+
+  // Encode data in-place
+  PIXEL_T *src = buf;
+  rdr::U8 *dst = (rdr::U8 *)buf;
+  int count = r.area();
+  PIXEL_T rgb;
+  TIGHT_COLOR_LIST *pnode;
+  int rep = 0;
+
+  while (count--) {
+    rgb = *src++;
+    while (count && *src == rgb) {
+      rep++, src++, count--;
+    }
+    pnode = s_palette.hash[HASH_FUNCTION(rgb)];
+    while (pnode != NULL) {
+      if ((PIXEL_T)pnode->rgb == rgb) {
+        *dst++ = (rdr::U8)pnode->idx;
+        while (rep) {
+          *dst++ = (rdr::U8)pnode->idx;
+          rep--;
+        }
+        break;
+      }
+      pnode = pnode->next;
+    }
+  }
+
+  // Write the data
+  compressData(os, &zos[streamId], buf, r.area(), s_pconf->idxZlibLevel);
+}
+#endif  // #if (BPP != 8)
+
+//
+// JPEG compression.
+//
+
+#if (BPP != 8)
+static void PREPARE_JPEG_ROW (PIXEL_T *src, const PixelFormat& pf,
+                              rdr::U8 *dst, int count)
+{
+  // FIXME: Add a version of this function optimized for 24-bit colors?
+  PIXEL_T pix;
+  while (count--) {
+    pix = *src++;
+    if (s_endianMismatch)
+      pix = SWAP_PIXEL(pix);
+    *dst++ = (rdr::U8)((pix >> pf.redShift   & pf.redMax)   * 255 / pf.redMax);
+    *dst++ = (rdr::U8)((pix >> pf.greenShift & pf.greenMax) * 255 / pf.greenMax);
+    *dst++ = (rdr::U8)((pix >> pf.blueShift  & pf.blueMax)  * 255 / pf.blueMax);
+  }
+}
+#endif  // #if (BPP != 8)
+
+#if (BPP != 8)
+static void ENCODE_JPEG_RECT (rdr::OutStream *os, PIXEL_T *buf,
+                              const PixelFormat& pf, const Rect& r)
+{
+  int w = r.width();
+  int h = r.height();
+
+  struct jpeg_compress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+
+  // FIXME: Make srcBuf[] and/or dstBuf[] static?
+  rdr::U8 *srcBuf = new rdr::U8[w * 3];
+  JSAMPROW rowPointer[1];
+  rowPointer[0] = (JSAMPROW)srcBuf;
+
+  cinfo.err = jpeg_std_error(&jerr);
+  jpeg_create_compress(&cinfo);
+
+  cinfo.image_width = w;
+  cinfo.image_height = h;
+  cinfo.input_components = 3;
+  cinfo.in_color_space = JCS_RGB;
+
+  jpeg_set_defaults(&cinfo);
+  jpeg_set_quality(&cinfo, s_pjconf->jpegQuality, TRUE);
+
+  rdr::U8 *dstBuf = new rdr::U8[2048];
+  JpegSetDstManager(&cinfo, dstBuf, 2048);
+
+  jpeg_start_compress(&cinfo, TRUE);
+  for (int dy = 0; dy < h; dy++) {
+    PREPARE_JPEG_ROW(&buf[dy * w], pf, srcBuf, w);
+    jpeg_write_scanlines(&cinfo, rowPointer, 1);
+  }
+  jpeg_finish_compress(&cinfo);
+  jpeg_destroy_compress(&cinfo);
+
+  delete[] srcBuf;
+  delete[] dstBuf;
+
+  os->writeU8(0x09 << 4);
+  os->writeCompactLength(s_jpeg_os.length());
+  os->writeBytes(s_jpeg_os.data(), s_jpeg_os.length());
+}
+#endif  // #if (BPP != 8)
+
+//
+// Determine the number of colors in the rectangle, and fill in the palette.
+//
+
+#if (BPP == 8)
+static void FILL_PALETTE (PIXEL_T *data, int count)
+{
+  PIXEL_T c0, c1;
+  int i, n0, n1;
+
+  s_palNumColors = 0;
+
+  c0 = data[0];
+  for (i = 1; i < count && data[i] == c0; i++);
+  if (i == count) {
+    s_palNumColors = 1;
+    return;                       // Solid rectangle
+  }
+
+  if (s_palMaxColors < 2)
+    return;
+
+  n0 = i;
+  c1 = data[i];
+  n1 = 0;
+  for (i++; i < count; i++) {
+    if (data[i] == c0) {
+      n0++;
+    } else if (data[i] == c1) {
+      n1++;
+    } else
+      break;
+  }
+  if (i == count) {
+    if (n0 > n1) {
+      s_monoBackground = (rdr::U32)c0;
+      s_monoForeground = (rdr::U32)c1;
+    } else {
+      s_monoBackground = (rdr::U32)c1;
+      s_monoForeground = (rdr::U32)c0;
+    }
+    s_palNumColors = 2;           // Two colors
+  }
+}
+#else   // (BPP != 8)
+static void FILL_PALETTE (PIXEL_T *data, int count)
+{
+  PIXEL_T c0, c1, ci = 0;
+  int i, n0, n1, ni;
+
+  c0 = data[0];
+  for (i = 1; i < count && data[i] == c0; i++);
+  if (i >= count) {
+    s_palNumColors = 1;           // Solid rectangle
+    return;
+  }
+
+  if (s_palMaxColors < 2) {
+    s_palNumColors = 0;           // Full-color format preferred
+    return;
+  }
+
+  n0 = i;
+  c1 = data[i];
+  n1 = 0;
+  for (i++; i < count; i++) {
+    ci = data[i];
+    if (ci == c0) {
+      n0++;
+    } else if (ci == c1) {
+      n1++;
+    } else
+      break;
+  }
+  if (i >= count) {
+    if (n0 > n1) {
+      s_monoBackground = (rdr::U32)c0;
+      s_monoForeground = (rdr::U32)c1;
+    } else {
+      s_monoBackground = (rdr::U32)c1;
+      s_monoForeground = (rdr::U32)c0;
+    }
+    s_palNumColors = 2;           // Two colors
+    return;
+  }
+
+  paletteReset();
+  paletteInsert (c0, (rdr::U32)n0, BPP);
+  paletteInsert (c1, (rdr::U32)n1, BPP);
+
+  ni = 1;
+  for (i++; i < count; i++) {
+    if (data[i] == ci) {
+      ni++;
+    } else {
+      if (!paletteInsert (ci, (rdr::U32)ni, BPP))
+        return;
+      ci = data[i];
+      ni = 1;
+    }
+  }
+  paletteInsert (ci, (rdr::U32)ni, BPP);
+}
+#endif  // #if (BPP == 8)
+
+#undef PIXEL_T
+#undef WRITE_PIXEL
+#undef TIGHT_ENCODE
+#undef SWAP_PIXEL
+#undef HASH_FUNCTION
+#undef PACK_PIXELS
+#undef DETECT_SMOOTH_IMAGE
+#undef ENCODE_SOLID_RECT
+#undef ENCODE_FULLCOLOR_RECT
+#undef ENCODE_MONO_RECT
+#undef ENCODE_INDEXED_RECT
+#undef PREPARE_JPEG_ROW
+#undef ENCODE_JPEG_RECT
+#undef FILL_PALETTE
+}
diff --git a/common/rfb/transInitTempl.h b/common/rfb/transInitTempl.h
new file mode 100644
index 00000000..464cfdfc
--- /dev/null
+++ b/common/rfb/transInitTempl.h
@@ -0,0 +1,254 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// transInitTempl.h - templates for functions to initialise lookup tables for
+// the translation functions.
+//
+// This file is #included after having set the following macros:
+// BPPOUT - 8, 16 or 32
+
+#if !defined(BPPOUT)
+#error "transInitTempl.h: BPPOUT not defined"
+#endif
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#ifndef SWAP16
+#define SWAP16(n) ((((n) & 0xff) << 8) | (((n) >> 8) & 0xff))
+#endif
+
+#ifndef SWAP32
+#define SWAP32(n) (((n) >> 24) | (((n) & 0x00ff0000) >> 8) | \
+                   (((n) & 0x0000ff00) << 8) | ((n) << 24))
+#endif
+
+#define OUTPIXEL rdr::CONCAT2E(U,BPPOUT)
+#define SWAPOUT CONCAT2E(SWAP,BPPOUT)
+#define initSimpleCMtoTCOUT    CONCAT2E(initSimpleCMtoTC,BPPOUT)
+#define initSimpleTCtoTCOUT    CONCAT2E(initSimpleTCtoTC,BPPOUT)
+#define initSimpleCMtoCubeOUT  CONCAT2E(initSimpleCMtoCube,BPPOUT)
+#define initSimpleTCtoCubeOUT  CONCAT2E(initSimpleTCtoCube,BPPOUT)
+#define initRGBTCtoTCOUT       CONCAT2E(initRGBTCtoTC,BPPOUT)
+#define initRGBTCtoCubeOUT     CONCAT2E(initRGBTCtoCube,BPPOUT)
+#define initOneRGBTableOUT     CONCAT2E(initOneRGBTable,BPPOUT)
+#define initOneRGBCubeTableOUT CONCAT2E(initOneRGBCubeTable,BPPOUT)
+
+#ifndef TRANS_INIT_TEMPL_ENDIAN_TEST
+#define TRANS_INIT_TEMPL_ENDIAN_TEST
+  static rdr::U32 endianTest = 1;
+  static bool nativeBigEndian = *(rdr::U8*)(&endianTest) != 1;
+#endif
+
+void initSimpleCMtoTCOUT (rdr::U8** tablep, const PixelFormat& inPF,
+                          ColourMap* cm, const PixelFormat& outPF)
+{
+  if (inPF.bpp != 8 && inPF.bigEndian != nativeBigEndian)
+    throw Exception("Internal error: inPF is not native endian");
+
+  int size = 1 << inPF.bpp;
+
+  delete [] *tablep;
+  *tablep = new rdr::U8[size * sizeof(OUTPIXEL)];
+  OUTPIXEL* table = (OUTPIXEL*)*tablep;
+
+  for (int i = 0; i < size; i++) {
+    int r,g,b;
+    cm->lookup(i,&r,&g,&b);
+
+    table[i] = ((((r * outPF.redMax   + 32767) / 65535) << outPF.redShift) |
+                (((g * outPF.greenMax + 32767) / 65535) << outPF.greenShift) |
+                (((b * outPF.blueMax  + 32767) / 65535) << outPF.blueShift));
+#if (BPPOUT != 8)
+    if (outPF.bigEndian != nativeBigEndian)
+      table[i] = SWAPOUT (table[i]);
+#endif
+  }
+}
+
+void initSimpleTCtoTCOUT (rdr::U8** tablep, const PixelFormat& inPF,
+                          const PixelFormat& outPF)
+{
+  if (inPF.bpp != 8 && inPF.bigEndian != nativeBigEndian)
+    throw Exception("Internal error: inPF is not native endian");
+
+  int size = 1 << inPF.bpp;
+
+  delete [] *tablep;
+  *tablep = new rdr::U8[size * sizeof(OUTPIXEL)];
+  OUTPIXEL* table = (OUTPIXEL*)*tablep;
+
+  for (int i = 0; i < size; i++) {
+    int r = (i >> inPF.redShift)   & inPF.redMax;
+    int g = (i >> inPF.greenShift) & inPF.greenMax;
+    int b = (i >> inPF.blueShift)  & inPF.blueMax;
+      
+    r = (r * outPF.redMax   + inPF.redMax/2)   / inPF.redMax;
+    g = (g * outPF.greenMax + inPF.greenMax/2) / inPF.greenMax;
+    b = (b * outPF.blueMax  + inPF.blueMax/2)  / inPF.blueMax;
+      
+    table[i] = ((r << outPF.redShift)   |
+                (g << outPF.greenShift) |
+                (b << outPF.blueShift));
+#if (BPPOUT != 8)
+    if (outPF.bigEndian != nativeBigEndian)
+      table[i] = SWAPOUT (table[i]);
+#endif
+  }
+}
+
+void initSimpleCMtoCubeOUT (rdr::U8** tablep, const PixelFormat& inPF,
+                            ColourMap* cm, ColourCube* cube)
+{
+  if (inPF.bpp != 8 && inPF.bigEndian != nativeBigEndian)
+    throw Exception("Internal error: inPF is not native endian");
+
+  int size = 1 << inPF.bpp;
+
+  delete [] *tablep;
+  *tablep = new rdr::U8[size * sizeof(OUTPIXEL)];
+  OUTPIXEL* table = (OUTPIXEL*)*tablep;
+
+  for (int i = 0; i < size; i++) {
+    int r,g,b;
+    cm->lookup(i,&r,&g,&b);
+    r = (r * (cube->nRed-1)   + 32767) / 65535;
+    g = (g * (cube->nGreen-1) + 32767) / 65535;
+    b = (b * (cube->nBlue-1)  + 32767) / 65535;
+    table[i] = cube->lookup(r, g, b);
+  }
+}
+
+void initSimpleTCtoCubeOUT (rdr::U8** tablep, const PixelFormat& inPF,
+                            ColourCube* cube)
+{
+  if (inPF.bpp != 8 && inPF.bigEndian != nativeBigEndian)
+    throw Exception("Internal error: inPF is not native endian");
+
+  int size = 1 << inPF.bpp;
+
+  delete [] *tablep;
+  *tablep = new rdr::U8[size * sizeof(OUTPIXEL)];
+  OUTPIXEL* table = (OUTPIXEL*)*tablep;
+
+  for (int i = 0; i < size; i++) {
+    int r = (i >> inPF.redShift)   & inPF.redMax;
+    int g = (i >> inPF.greenShift) & inPF.greenMax;
+    int b = (i >> inPF.blueShift)  & inPF.blueMax;
+
+    r = (r * (cube->nRed-1)   + inPF.redMax/2)   / inPF.redMax;
+    g = (g * (cube->nGreen-1) + inPF.greenMax/2) / inPF.greenMax;
+    b = (b * (cube->nBlue-1)  + inPF.blueMax/2)  / inPF.blueMax;
+
+    table[i] = cube->lookup(r, g, b);
+  }
+}
+
+void initOneRGBTableOUT (OUTPIXEL* table, int inMax, int outMax,
+                         int outShift, bool swap)
+{
+  int size = inMax + 1;
+
+  for (int i = 0; i < size; i++) {
+    table[i] = ((i * outMax + inMax / 2) / inMax) << outShift;
+#if (BPPOUT != 8)
+    if (swap)
+      table[i] = SWAPOUT (table[i]);
+#endif
+  }
+}
+
+void initRGBTCtoTCOUT (rdr::U8** tablep, const PixelFormat& inPF,
+                       const PixelFormat& outPF)
+{
+  if (inPF.bpp != 8 && inPF.bigEndian != nativeBigEndian)
+    throw Exception("Internal error: inPF is not native endian");
+
+  int size = inPF.redMax + inPF.greenMax + inPF.blueMax + 3;
+
+  delete [] *tablep;
+  *tablep = new rdr::U8[size * sizeof(OUTPIXEL)];
+
+  OUTPIXEL* redTable = (OUTPIXEL*)*tablep;
+  OUTPIXEL* greenTable = redTable + inPF.redMax + 1;
+  OUTPIXEL* blueTable = greenTable + inPF.greenMax + 1;
+
+  bool swap = (outPF.bigEndian != nativeBigEndian);
+
+  initOneRGBTableOUT (redTable, inPF.redMax, outPF.redMax, 
+                           outPF.redShift, swap);
+  initOneRGBTableOUT (greenTable, inPF.greenMax, outPF.greenMax,
+                           outPF.greenShift, swap);
+  initOneRGBTableOUT (blueTable, inPF.blueMax, outPF.blueMax,
+                           outPF.blueShift, swap);
+}
+
+
+void initOneRGBCubeTableOUT (OUTPIXEL* table, int inMax, int outMax,
+                             int outMult)
+{
+  int size = inMax + 1;
+
+  for (int i = 0; i < size; i++) {
+    table[i] = ((i * outMax + inMax / 2) / inMax) * outMult;
+  }
+}
+
+void initRGBTCtoCubeOUT (rdr::U8** tablep, const PixelFormat& inPF,
+                         ColourCube* cube)
+{
+  if (inPF.bpp != 8 && inPF.bigEndian != nativeBigEndian)
+    throw Exception("Internal error: inPF is not native endian");
+
+  int size = inPF.redMax + inPF.greenMax + inPF.blueMax + 3 + cube->size();
+
+  delete [] *tablep;
+  *tablep = new rdr::U8[size * sizeof(OUTPIXEL)];
+
+  OUTPIXEL* redTable = (OUTPIXEL*)*tablep;
+  OUTPIXEL* greenTable = redTable + inPF.redMax + 1;
+  OUTPIXEL* blueTable = greenTable + inPF.greenMax + 1;
+  OUTPIXEL* cubeTable = blueTable + inPF.blueMax + 1;
+
+  initOneRGBCubeTableOUT (redTable,   inPF.redMax,   cube->nRed-1,
+                               cube->redMult());
+  initOneRGBCubeTableOUT (greenTable, inPF.greenMax, cube->nGreen-1,
+                               cube->greenMult());
+  initOneRGBCubeTableOUT (blueTable,  inPF.blueMax,  cube->nBlue-1,
+                               cube->blueMult());
+  for (int i = 0; i < cube->size(); i++) {
+    cubeTable[i] = cube->table[i];
+  }
+}
+
+#undef OUTPIXEL
+#undef initSimpleCMtoTCOUT
+#undef initSimpleTCtoTCOUT
+#undef initSimpleCMtoCubeOUT
+#undef initSimpleTCtoCubeOUT
+#undef initRGBTCtoTCOUT
+#undef initRGBTCtoCubeOUT
+#undef initOneRGBTableOUT
+#undef initOneRGBCubeTableOUT
+}
diff --git a/common/rfb/transTempl.h b/common/rfb/transTempl.h
new file mode 100644
index 00000000..09dc7f95
--- /dev/null
+++ b/common/rfb/transTempl.h
@@ -0,0 +1,151 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// transTempl.h - templates for translation functions.
+//
+// This file is #included after having set the following macros:
+// BPPIN  - 8, 16 or 32
+// BPPOUT - 8, 16 or 32
+
+#if !defined(BPPIN) || !defined(BPPOUT)
+#error "transTempl.h: BPPIN or BPPOUT not defined"
+#endif
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#ifndef CONCAT4E
+#define CONCAT4(a,b,c,d) a##b##c##d
+#define CONCAT4E(a,b,c,d) CONCAT4(a,b,c,d)
+#endif
+
+#define INPIXEL rdr::CONCAT2E(U,BPPIN)
+#define OUTPIXEL rdr::CONCAT2E(U,BPPOUT)
+#define transSimpleINtoOUT CONCAT4E(transSimple,BPPIN,to,BPPOUT)
+#define transRGBINtoOUT CONCAT4E(transRGB,BPPIN,to,BPPOUT)
+#define transRGBCubeINtoOUT CONCAT4E(transRGBCube,BPPIN,to,BPPOUT)
+
+#if (BPPIN <= 16)
+
+// transSimpleINtoOUT uses a single table.  This can be used for any incoming
+// and outgoing pixel formats, as long as the incoming pixel format is not too
+// large (for 16bpp, the table needs 64K entries).
+
+void transSimpleINtoOUT (void* table_,
+                         const PixelFormat& inPF, void* inPtr, int inStride,
+                         const PixelFormat& outPF, void* outPtr, int outStride,
+                         int width, int height)
+{
+  OUTPIXEL* table = (OUTPIXEL*)table_;
+  INPIXEL* ip = (INPIXEL*)inPtr;
+  OUTPIXEL* op = (OUTPIXEL*)outPtr;
+  int inExtra = inStride - width;
+  int outExtra = outStride - width;
+
+  while (height > 0) {
+    OUTPIXEL* opEndOfRow = op + width;
+    while (op < opEndOfRow)
+      *op++ = table[*ip++];
+    ip += inExtra;
+    op += outExtra;
+    height--;
+  }
+}
+
+#endif
+
+#if (BPPIN >= 16)
+
+// transRGBINtoOUT uses three tables, one each for red, green and blue
+// components and adds the values to produce the result.  This can be used
+// where a single table would be too large (e.g. 32bpp).  It only works for a
+// trueColour incoming pixel format.  Usually the outgoing pixel format is
+// trueColour, but we add rather than ORing the three values so that it is also
+// possible to generate an index into a colour cube.  I believe that in most
+// cases adding is just as fast as ORing - if not then we should split this
+// into two different functions for efficiency.
+
+void transRGBINtoOUT (void* table,
+                      const PixelFormat& inPF, void* inPtr, int inStride,
+                      const PixelFormat& outPF, void* outPtr, int outStride,
+                      int width, int height)
+{
+  OUTPIXEL* redTable = (OUTPIXEL*)table;
+  OUTPIXEL* greenTable = redTable + inPF.redMax + 1;
+  OUTPIXEL* blueTable = greenTable + inPF.greenMax + 1;
+  INPIXEL* ip = (INPIXEL*)inPtr;
+  OUTPIXEL* op = (OUTPIXEL*)outPtr;
+  int inExtra = inStride - width;
+  int outExtra = outStride - width;
+
+  while (height > 0) {
+    OUTPIXEL* opEndOfRow = op + width;
+    while (op < opEndOfRow) {
+      *op++ = (redTable  [(*ip >> inPF.redShift)   & inPF.redMax] +
+               greenTable[(*ip >> inPF.greenShift) & inPF.greenMax] +
+               blueTable [(*ip >> inPF.blueShift)  & inPF.blueMax]);
+      ip++;
+    }
+    ip += inExtra;
+    op += outExtra;
+    height--;
+  }
+}
+
+// transRGBCubeINtoOUT is similar to transRGBINtoOUT but also looks up the
+// colour cube index in a fourth table to yield a pixel value.
+
+void transRGBCubeINtoOUT (void* table,
+                          const PixelFormat& inPF, void* inPtr, int inStride,
+                          const PixelFormat& outPF, void* outPtr,
+                          int outStride, int width, int height)
+{
+  OUTPIXEL* redTable = (OUTPIXEL*)table;
+  OUTPIXEL* greenTable = redTable + inPF.redMax + 1;
+  OUTPIXEL* blueTable = greenTable + inPF.greenMax + 1;
+  OUTPIXEL* cubeTable = blueTable + inPF.blueMax + 1;
+  INPIXEL* ip = (INPIXEL*)inPtr;
+  OUTPIXEL* op = (OUTPIXEL*)outPtr;
+  int inExtra = inStride - width;
+  int outExtra = outStride - width;
+
+  while (height > 0) {
+    OUTPIXEL* opEndOfRow = op + width;
+    while (op < opEndOfRow) {
+      *op++ = cubeTable[(redTable  [(*ip >> inPF.redShift)   & inPF.redMax] +
+                         greenTable[(*ip >> inPF.greenShift) & inPF.greenMax] +
+                         blueTable [(*ip >> inPF.blueShift)  & inPF.blueMax])];
+      ip++;
+    }
+    ip += inExtra;
+    op += outExtra;
+    height--;
+  }
+}
+
+#endif
+
+#undef INPIXEL
+#undef OUTPIXEL
+#undef transSimpleINtoOUT
+#undef transRGBINtoOUT
+#undef transRGBCubeINtoOUT
diff --git a/common/rfb/util.cxx b/common/rfb/util.cxx
new file mode 100644
index 00000000..57454324
--- /dev/null
+++ b/common/rfb/util.cxx
@@ -0,0 +1,184 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+/*
+ * The following applies to stcasecmp and strncasecmp implementations:
+ *
+ * Copyright (c) 1987 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of California at Berkeley. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific written prior permission. This software
+ * is provided ``as is'' without express or implied warranty.
+ */
+
+#include <rfb/util.h>
+
+// Provide strcasecmp() and/or strncasecmp() if absent on this system.
+
+#ifndef WIN32
+#if !defined(HAVE_STRCASECMP) || !defined(HAVE_STRNCASECMP)
+
+extern "C" {
+
+/*
+ * This array is designed for mapping upper and lower case letter
+ * together for a case independent comparison.  The mappings are
+ * based upon ascii character sequences.
+ */
+static unsigned char s_charmap[] = {
+	'\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
+	'\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
+	'\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
+	'\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
+	'\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
+	'\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
+	'\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
+	'\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
+	'\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+	'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+	'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+	'\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
+	'\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
+	'\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
+	'\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
+	'\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
+	'\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
+	'\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
+	'\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
+	'\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
+	'\240', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
+	'\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
+	'\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
+	'\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
+	'\300', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
+	'\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
+	'\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
+	'\370', '\371', '\372', '\333', '\334', '\335', '\336', '\337',
+	'\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
+	'\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
+	'\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
+	'\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377',
+};
+
+#ifndef HAVE_STRCASECMP
+int
+strcasecmp(const char *s1, const char *s2)
+{
+    unsigned char u1, u2;
+
+    for (;;) {
+	u1 = (unsigned char) *s1++;
+	u2 = (unsigned char) *s2++;
+	if (s_charmap[u1] != s_charmap[u2]) {
+	    return s_charmap[u1] - s_charmap[u2];
+	}
+	if (u1 == '\0') {
+	    return 0;
+	}
+    }
+}
+#endif // !defined(HAVE_STRCASECMP)
+
+#ifndef HAVE_STRNCASECMP
+int
+strncasecmp(const char *s1, const char *s2, size_t n)
+{
+    unsigned char u1, u2;
+
+    for (; n != 0; --n) {
+	u1 = (unsigned char) *s1++;
+	u2 = (unsigned char) *s2++;
+	if (s_charmap[u1] != s_charmap[u2]) {
+	    return s_charmap[u1] - s_charmap[u2];
+	}
+	if (u1 == '\0') {
+	    return 0;
+	}
+    }
+    return 0;
+}
+#endif // !defined(HAVE_STRNCASECMP)
+
+} // extern "C"
+
+#endif // !defined(HAVE_STRCASECMP) || !defined(HAVE_STRNCASECMP)
+#endif // defined(WIN32)
+
+namespace rfb {
+
+  char* strDup(const char* s) {
+    if (!s) return 0;
+    int l = strlen(s);
+    char* r = new char[l+1];
+    memcpy(r, s, l+1);
+    return r;
+  };
+
+  void strFree(char* s) {
+    delete [] s;
+  }
+
+
+  bool strSplit(const char* src, const char limiter, char** out1, char** out2, bool fromEnd) {
+    CharArray out1old, out2old;
+    if (out1) out1old.buf = *out1;
+    if (out2) out2old.buf = *out2;
+    int len = strlen(src);
+    int i=0, increment=1, limit=len;
+    if (fromEnd) {
+      i=len-1; increment = -1; limit = -1;
+    }
+    while (i!=limit) {
+      if (src[i] == limiter) {
+        if (out1) {
+          *out1 = new char[i+1];
+          if (i) memcpy(*out1, src, i);
+          (*out1)[i] = 0;
+        }
+        if (out2) {
+          *out2 = new char[len-i];
+          if (len-i-1) memcpy(*out2, &src[i+1], len-i-1);
+          (*out2)[len-i-1] = 0;
+        }
+        return true;
+      }
+      i+=increment;
+    }
+    if (out1) *out1 = strDup(src);
+    if (out2) *out2 = 0;
+    return false;
+  }
+
+  bool strContains(const char* src, char c) {
+    int l=strlen(src);
+    for (int i=0; i<l; i++)
+      if (src[i] == c) return true;
+    return false;
+  }
+
+  void strCopy(char* dest, const char* src, int destlen) {
+    if (src)
+      strncpy(dest, src, destlen-1);
+    dest[src ? destlen-1 : 0] = 0;
+  }
+
+};
diff --git a/common/rfb/util.h b/common/rfb/util.h
new file mode 100644
index 00000000..fa205f08
--- /dev/null
+++ b/common/rfb/util.h
@@ -0,0 +1,111 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// util.h - miscellaneous useful bits
+//
+
+#ifndef __RFB_UTIL_H__
+#define __RFB_UTIL_H__
+
+#include <limits.h>
+#include <string.h>
+
+namespace rfb {
+
+  // -=- Class to handle cleanup of arrays of characters
+  class CharArray {
+  public:
+    CharArray() : buf(0) {}
+    CharArray(char* str) : buf(str) {} // note: assumes ownership
+    CharArray(int len) {
+      buf = new char[len];
+    }
+    ~CharArray() {
+      delete [] buf;
+    }
+    // Get the buffer pointer & clear it (i.e. caller takes ownership)
+    char* takeBuf() {char* tmp = buf; buf = 0; return tmp;}
+    void replaceBuf(char* b) {delete [] buf; buf = b;}
+    char* buf;
+  private:
+    CharArray(const CharArray&);
+    CharArray& operator=(const CharArray&);
+  };
+
+  char* strDup(const char* s);
+  void strFree(char* s);
+
+  // Returns true if split successful.  Returns false otherwise.
+  // ALWAYS *copies* first part of string to out1 buffer.
+  // If limiter not found, leaves out2 alone (null) and just copies to out1.
+  // If out1 or out2 non-zero, calls strFree and zeroes them.
+  // If fromEnd is true, splits at end of string rather than beginning.
+  // Either out1 or out2 may be null, in which case the split will not return
+  // that part of the string.  Obviously, setting both to 0 is not useful...
+  bool strSplit(const char* src, const char limiter, char** out1, char** out2, bool fromEnd=false);
+
+  // Returns true if src contains c
+  bool strContains(const char* src, char c);
+
+  // Copies src to dest, up to specified length-1, and guarantees termination
+  void strCopy(char* dest, const char* src, int destlen);
+
+
+  // HELPER functions for timeout handling
+
+  // soonestTimeout() is a function to help work out the soonest of several
+  //   timeouts.
+  inline void soonestTimeout(int* timeout, int newTimeout) {
+    if (newTimeout && (!*timeout || newTimeout < *timeout))
+      *timeout = newTimeout;
+  }
+
+  // secsToMillis() turns seconds into milliseconds, capping the value so it
+  //   can't wrap round and become -ve
+  inline int secsToMillis(int secs) {
+    return (secs < 0 || secs > (INT_MAX/1000) ? INT_MAX : secs * 1000);
+  }
+}
+
+// Some platforms (e.g. Windows) include max() and min() macros in their
+// standard headers, but they are also standard C++ template functions, so some
+// C++ headers will undefine them.  So we steer clear of the names min and max
+// and define __rfbmin and __rfbmax instead.
+
+#ifndef __rfbmax
+#define __rfbmax(a,b) (((a) > (b)) ? (a) : (b))
+#endif
+#ifndef __rfbmin
+#define __rfbmin(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+
+// Declare strcasecmp() and/or strncasecmp() if absent on this system.
+
+#if !defined(WIN32) && !defined(HAVE_STRCASECMP)
+extern "C" {
+  int strcasecmp(const char *s1, const char *s2);
+}
+#endif
+#if !defined(WIN32) && !defined(HAVE_STRNCASECMP)
+extern "C" {
+  int strncasecmp(const char *s1, const char *s2, size_t n);
+}
+#endif
+
+#endif
diff --git a/common/rfb/zrleDecode.h b/common/rfb/zrleDecode.h
new file mode 100644
index 00000000..15d27900
--- /dev/null
+++ b/common/rfb/zrleDecode.h
@@ -0,0 +1,251 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// ZRLE decoding function.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+// EXTRA_ARGS         - optional extra arguments
+// FILL_RECT          - fill a rectangle with a single colour
+// IMAGE_RECT         - draw a rectangle of pixel data from a buffer
+
+#include <rdr/InStream.h>
+#include <rdr/ZlibInStream.h>
+#include <assert.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#ifdef CPIXEL
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define READ_PIXEL CONCAT2E(readOpaque,CPIXEL)
+#define ZRLE_DECODE CONCAT2E(zrleDecode,CPIXEL)
+#else
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define READ_PIXEL CONCAT2E(readOpaque,BPP)
+#define ZRLE_DECODE CONCAT2E(zrleDecode,BPP)
+#endif
+
+void ZRLE_DECODE (const Rect& r, rdr::InStream* is,
+                      rdr::ZlibInStream* zis, PIXEL_T* buf
+#ifdef EXTRA_ARGS
+                      , EXTRA_ARGS
+#endif
+                      )
+{
+  int length = is->readU32();
+  zis->setUnderlying(is, length);
+  Rect t;
+
+  for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 64) {
+
+    t.br.y = __rfbmin(r.br.y, t.tl.y + 64);
+
+    for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 64) {
+
+      t.br.x = __rfbmin(r.br.x, t.tl.x + 64);
+
+      int mode = zis->readU8();
+      bool rle = mode & 128;
+      int palSize = mode & 127;
+      PIXEL_T palette[128];
+
+      for (int i = 0; i < palSize; i++) {
+        palette[i] = zis->READ_PIXEL();
+      }
+
+      if (palSize == 1) {
+        PIXEL_T pix = palette[0];
+        FILL_RECT(t,pix);
+        continue;
+      }
+
+      if (!rle) {
+        if (palSize == 0) {
+
+          // raw
+
+#ifdef CPIXEL
+          for (PIXEL_T* ptr = buf; ptr < buf+t.area(); ptr++) {
+            *ptr = zis->READ_PIXEL();
+          }
+#else
+          zis->readBytes(buf, t.area() * (BPP / 8));
+#endif
+
+        } else {
+
+          // packed pixels
+          int bppp = ((palSize > 16) ? 8 :
+                      ((palSize > 4) ? 4 : ((palSize > 2) ? 2 : 1)));
+
+          PIXEL_T* ptr = buf;
+
+          for (int i = 0; i < t.height(); i++) {
+            PIXEL_T* eol = ptr + t.width();
+            rdr::U8 byte = 0;
+            rdr::U8 nbits = 0;
+
+            while (ptr < eol) {
+              if (nbits == 0) {
+                byte = zis->readU8();
+                nbits = 8;
+              }
+              nbits -= bppp;
+              rdr::U8 index = (byte >> nbits) & ((1 << bppp) - 1) & 127;
+              *ptr++ = palette[index];
+            }
+          }
+        }
+
+#ifdef FAVOUR_FILL_RECT
+       //fprintf(stderr,"copying data to screen %dx%d at %d,%d\n",
+        //t.width(),t.height(),t.tl.x,t.tl.y);
+        IMAGE_RECT(t,buf);
+#endif
+
+      } else {
+
+        if (palSize == 0) {
+
+          // plain RLE
+
+          PIXEL_T* ptr = buf;
+          PIXEL_T* end = ptr + t.area();
+          while (ptr < end) {
+            PIXEL_T pix = zis->READ_PIXEL();
+            int len = 1;
+            int b;
+            do {
+              b = zis->readU8();
+              len += b;
+            } while (b == 255);
+
+            assert(len <= end - ptr);
+
+#ifdef FAVOUR_FILL_RECT
+            int i = ptr - buf;
+            ptr += len;
+
+            int runX = i % t.width();
+            int runY = i / t.width();
+
+            if (runX + len > t.width()) {
+              if (runX != 0) {
+                FILL_RECT(Rect(t.tl.x+runX, t.tl.y+runY, t.width()-runX, 1),
+                          pix);
+                len -= t.width()-runX;
+                runX = 0;
+                runY++;
+              }
+
+              if (len > t.width()) {
+                FILL_RECT(Rect(t.tl.x, t.tl.y+runY, t.width(), len/t.width()),
+                          pix);
+                runY += len / t.width();
+                len = len % t.width();
+              }
+            }
+
+            if (len != 0) {
+              FILL_RECT(Rect(t.tl.x+runX, t.tl.y+runY, len, 1), pix);
+            }
+#else
+            while (len-- > 0) *ptr++ = pix;
+#endif
+
+          }
+        } else {
+
+          // palette RLE
+
+          PIXEL_T* ptr = buf;
+          PIXEL_T* end = ptr + t.area();
+          while (ptr < end) {
+            int index = zis->readU8();
+            int len = 1;
+            if (index & 128) {
+              int b;
+              do {
+                b = zis->readU8();
+                len += b;
+              } while (b == 255);
+
+              assert(len <= end - ptr);
+            }
+
+            index &= 127;
+
+            PIXEL_T pix = palette[index];
+
+#ifdef FAVOUR_FILL_RECT
+            int i = ptr - buf;
+            ptr += len;
+
+            int runX = i % t.width();
+            int runY = i / t.width();
+
+            if (runX + len > t.width()) {
+              if (runX != 0) {
+                FILL_RECT(Rect(t.tl.x+runX, t.tl.y+runY, t.width()-runX, 1),
+                          pix);
+                len -= t.width()-runX;
+                runX = 0;
+                runY++;
+              }
+
+              if (len > t.width()) {
+                FILL_RECT(Rect(t.tl.x, t.tl.y+runY, t.width(), len/t.width()),
+                          pix);
+                runY += len / t.width();
+                len = len % t.width();
+              }
+            }
+
+            if (len != 0) {
+              FILL_RECT(Rect(t.tl.x+runX, t.tl.y+runY, len, 1), pix);
+            }
+#else
+            while (len-- > 0) *ptr++ = pix;
+#endif
+          }
+        }
+      }
+
+#ifndef FAVOUR_FILL_RECT
+      //fprintf(stderr,"copying data to screen %dx%d at %d,%d\n",
+      //t.width(),t.height(),t.tl.x,t.tl.y);
+      IMAGE_RECT(t,buf);
+#endif
+    }
+  }
+
+  zis->reset();
+}
+
+#undef ZRLE_DECODE
+#undef READ_PIXEL
+#undef PIXEL_T
+}
diff --git a/common/rfb/zrleEncode.h b/common/rfb/zrleEncode.h
new file mode 100644
index 00000000..9b7263b3
--- /dev/null
+++ b/common/rfb/zrleEncode.h
@@ -0,0 +1,328 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// zrleEncode.h - zrle encoding function.
+//
+// This file is #included after having set the following macros:
+// BPP                - 8, 16 or 32
+// EXTRA_ARGS         - optional extra arguments
+// GET_IMAGE_INTO_BUF - gets a rectangle of pixel data into a buffer
+//
+// Note that the buf argument to ZRLE_ENCODE needs to be at least one pixel
+// bigger than the largest tile of pixel data, since the ZRLE encoding
+// algorithm writes to the position one past the end of the pixel data.
+//
+
+#include <rdr/OutStream.h>
+#include <rdr/ZlibOutStream.h>
+#include <assert.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#ifdef CPIXEL
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define WRITE_PIXEL CONCAT2E(writeOpaque,CPIXEL)
+#define ZRLE_ENCODE CONCAT2E(zrleEncode,CPIXEL)
+#define ZRLE_ENCODE_TILE CONCAT2E(zrleEncodeTile,CPIXEL)
+#define BPPOUT 24
+#else
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define WRITE_PIXEL CONCAT2E(writeOpaque,BPP)
+#define ZRLE_ENCODE CONCAT2E(zrleEncode,BPP)
+#define ZRLE_ENCODE_TILE CONCAT2E(zrleEncodeTile,BPP)
+#define BPPOUT BPP
+#endif
+
+#ifndef ZRLE_ONCE
+#define ZRLE_ONCE
+static const int bitsPerPackedPixel[] = {
+  0, 1, 2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4
+};
+
+// The PaletteHelper class helps us build up the palette from pixel data by
+// storing a reverse index using a simple hash-table
+
+class PaletteHelper {
+public:
+  enum { MAX_SIZE = 127 };
+
+  PaletteHelper()
+  {
+    memset(index, 255, sizeof(index));
+    size = 0;
+  }
+
+  inline int hash(rdr::U32 pix)
+  {
+    return (pix ^ (pix >> 17)) & 4095;
+  }
+
+  inline void insert(rdr::U32 pix)
+  {
+    if (size < MAX_SIZE) {
+      int i = hash(pix);
+      while (index[i] != 255 && key[i] != pix)
+        i++;
+      if (index[i] != 255) return;
+
+      index[i] = size;
+      key[i] = pix;
+      palette[size] = pix;
+    }
+    size++;
+  }
+
+  inline int lookup(rdr::U32 pix)
+  {
+    assert(size <= MAX_SIZE);
+    int i = hash(pix);
+    while (index[i] != 255 && key[i] != pix)
+      i++;
+    if (index[i] != 255) return index[i];
+    return -1;
+  }
+
+  rdr::U32 palette[MAX_SIZE];
+  rdr::U8 index[4096+MAX_SIZE];
+  rdr::U32 key[4096+MAX_SIZE];
+  int size;
+};
+#endif
+
+void ZRLE_ENCODE_TILE (PIXEL_T* data, int w, int h, rdr::OutStream* os);
+
+bool ZRLE_ENCODE (const Rect& r, rdr::OutStream* os,
+                  rdr::ZlibOutStream* zos, void* buf, int maxLen, Rect* actual
+#ifdef EXTRA_ARGS
+                  , EXTRA_ARGS
+#endif
+                  )
+{
+  zos->setUnderlying(os);
+  // RLE overhead is at worst 1 byte per 64x64 (4Kpixel) block
+  int worstCaseLine = r.width() * 64 * (BPPOUT/8) + 1 + r.width() / 64;
+  // Zlib overhead is at worst 6 bytes plus 5 bytes per 32Kbyte block.
+  worstCaseLine += 11 + 5 * (worstCaseLine >> 15);
+  Rect t;
+
+  for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 64) {
+
+    t.br.y = __rfbmin(r.br.y, t.tl.y + 64);
+
+    if (os->length() + worstCaseLine > maxLen) {
+      if (t.tl.y == r.tl.y)
+        throw Exception("ZRLE: not enough space for first line?");
+      actual->tl = r.tl;
+      actual->br.x = r.br.x;
+      actual->br.y = t.tl.y;
+      return false;
+    }
+
+    for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 64) {
+
+      t.br.x = __rfbmin(r.br.x, t.tl.x + 64);
+
+      GET_IMAGE_INTO_BUF(t,buf);
+
+      ZRLE_ENCODE_TILE((PIXEL_T*)buf, t.width(), t.height(), zos);
+    }
+
+    zos->flush();
+  }
+  return true;
+}
+
+
+void ZRLE_ENCODE_TILE (PIXEL_T* data, int w, int h, rdr::OutStream* os)
+{
+  // First find the palette and the number of runs
+
+  PaletteHelper ph;
+
+  int runs = 0;
+  int singlePixels = 0;
+
+  PIXEL_T* ptr = data;
+  PIXEL_T* end = ptr + h * w;
+  *end = ~*(end-1); // one past the end is different so the while loop ends
+
+  while (ptr < end) {
+    PIXEL_T pix = *ptr;
+    if (*++ptr != pix) {
+      singlePixels++;
+    } else {
+      while (*++ptr == pix) ;
+      runs++;
+    }
+    ph.insert(pix);
+  }
+
+  //fprintf(stderr,"runs %d, single pixels %d, paletteSize %d\n",
+  //        runs, singlePixels, ph.size);
+
+  // Solid tile is a special case
+
+  if (ph.size == 1) {
+    os->writeU8(1);
+    os->WRITE_PIXEL(ph.palette[0]);
+    return;
+  }
+
+  // Try to work out whether to use RLE and/or a palette.  We do this by
+  // estimating the number of bytes which will be generated and picking the
+  // method which results in the fewest bytes.  Of course this may not result
+  // in the fewest bytes after compression...
+
+  bool useRle = false;
+  bool usePalette = false;
+
+  int estimatedBytes = w * h * (BPPOUT/8); // start assuming raw
+
+  int plainRleBytes = ((BPPOUT/8)+1) * (runs + singlePixels);
+
+  if (plainRleBytes < estimatedBytes) {
+    useRle = true;
+    estimatedBytes = plainRleBytes;
+  }
+
+  if (ph.size < 128) {
+    int paletteRleBytes = (BPPOUT/8) * ph.size + 2 * runs + singlePixels;
+
+    if (paletteRleBytes < estimatedBytes) {
+      useRle = true;
+      usePalette = true;
+      estimatedBytes = paletteRleBytes;
+    }
+
+    if (ph.size < 17) {
+      int packedBytes = ((BPPOUT/8) * ph.size +
+                         w * h * bitsPerPackedPixel[ph.size-1] / 8);
+
+      if (packedBytes < estimatedBytes) {
+        useRle = false;
+        usePalette = true;
+        estimatedBytes = packedBytes;
+      }
+    }
+  }
+
+  if (!usePalette) ph.size = 0;
+
+  os->writeU8((useRle ? 128 : 0) | ph.size);
+
+  for (int i = 0; i < ph.size; i++) {
+    os->WRITE_PIXEL(ph.palette[i]);
+  }
+
+  if (useRle) {
+
+    PIXEL_T* ptr = data;
+    PIXEL_T* end = ptr + w * h;
+    PIXEL_T* runStart;
+    PIXEL_T pix;
+    while (ptr < end) {
+      runStart = ptr;
+      pix = *ptr++;
+      while (*ptr == pix && ptr < end)
+        ptr++;
+      int len = ptr - runStart;
+      if (len <= 2 && usePalette) {
+        int index = ph.lookup(pix);
+        if (len == 2)
+          os->writeU8(index);
+        os->writeU8(index);
+        continue;
+      }
+      if (usePalette) {
+        int index = ph.lookup(pix);
+        os->writeU8(index | 128);
+      } else {
+        os->WRITE_PIXEL(pix);
+      }
+      len -= 1;
+      while (len >= 255) {
+        os->writeU8(255);
+        len -= 255;
+      }
+      os->writeU8(len);
+    }
+
+  } else {
+
+    // no RLE
+
+    if (usePalette) {
+
+      // packed pixels
+
+      assert (ph.size < 17);
+
+      int bppp = bitsPerPackedPixel[ph.size-1];
+
+      PIXEL_T* ptr = data;
+
+      for (int i = 0; i < h; i++) {
+        rdr::U8 nbits = 0;
+        rdr::U8 byte = 0;
+
+        PIXEL_T* eol = ptr + w;
+
+        while (ptr < eol) {
+          PIXEL_T pix = *ptr++;
+          rdr::U8 index = ph.lookup(pix);
+          byte = (byte << bppp) | index;
+          nbits += bppp;
+          if (nbits >= 8) {
+            os->writeU8(byte);
+            nbits = 0;
+          }
+        }
+        if (nbits > 0) {
+          byte <<= 8 - nbits;
+          os->writeU8(byte);
+        }
+      }
+    } else {
+
+      // raw
+
+#ifdef CPIXEL
+      for (PIXEL_T* ptr = data; ptr < data+w*h; ptr++) {
+        os->WRITE_PIXEL(*ptr);
+      }
+#else
+      os->writeBytes(data, w*h*(BPP/8));
+#endif
+    }
+  }
+}
+
+#undef PIXEL_T
+#undef WRITE_PIXEL
+#undef ZRLE_ENCODE
+#undef ZRLE_ENCODE_TILE
+#undef BPPOUT
+}
diff --git a/common/zlib/ChangeLog b/common/zlib/ChangeLog
new file mode 100644
index 00000000..eded33d4
--- /dev/null
+++ b/common/zlib/ChangeLog
@@ -0,0 +1,481 @@
+
+		ChangeLog file for zlib
+
+Changes in 1.1.4 (11 March 2002)
+- ZFREE was repeated on same allocation on some error conditions.
+  This creates a security problem described in
+  http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+  less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+  of 256 bytes. (A complete fix will be available in 1.1.5).
+	
+Changes in 1.1.3 (9 July 1998)
+- fix "an inflate input buffer bug that shows up on rare but persistent
+  occasions" (Mark)
+- fix gzread and gztell for concatenated .gz files (Didier Le Botlan)
+- fix gzseek(..., SEEK_SET) in write mode
+- fix crc check after a gzeek (Frank Faubert)
+- fix miniunzip when the last entry in a zip file is itself a zip file
+  (J Lillge)
+- add contrib/asm586 and contrib/asm686 (Brian Raiter)
+  See http://www.muppetlabs.com/~breadbox/software/assembly.html
+- add support for Delphi 3 in contrib/delphi (Bob Dellaca)
+- add support for C++Builder 3 and Delphi 3 in contrib/delphi2 (Davide Moretti)
+- do not exit prematurely in untgz if 0 at start of block (Magnus Holmgren)
+- use macro EXTERN instead of extern to support DLL for BeOS (Sander Stoks)
+- added a FAQ file
+
+- Support gzdopen on Mac with Metrowerks (Jason Linhart)
+- Do not redefine Byte on Mac (Brad Pettit & Jason Linhart)
+- define SEEK_END too if SEEK_SET is not defined (Albert Chin-A-Young)
+- avoid some warnings with Borland C (Tom Tanner)
+- fix a problem in contrib/minizip/zip.c for 16-bit MSDOS (Gilles Vollant)
+- emulate utime() for WIN32 in contrib/untgz  (Gilles Vollant)
+- allow several arguments to configure (Tim Mooney, Frodo Looijaard)
+- use libdir and includedir in Makefile.in (Tim Mooney)
+- support shared libraries on OSF1 V4 (Tim Mooney)
+- remove so_locations in "make clean"  (Tim Mooney)
+- fix maketree.c compilation error (Glenn, Mark)
+- Python interface to zlib now in Python 1.5 (Jeremy Hylton)
+- new Makefile.riscos (Rich Walker)
+- initialize static descriptors in trees.c for embedded targets (Nick Smith)
+- use "foo-gz" in example.c for RISCOS and VMS (Nick Smith)
+- add the OS/2 files in Makefile.in too (Andrew Zabolotny)
+- fix fdopen and halloc macros for Microsoft C 6.0 (Tom Lane)
+- fix maketree.c to allow clean compilation of inffixed.h (Mark)
+- fix parameter check in deflateCopy (Gunther Nikl)
+- cleanup trees.c, use compressed_len only in debug mode (Christian Spieler)
+- Many portability patches by Christian Spieler:
+  . zutil.c, zutil.h: added "const" for zmem*
+  . Make_vms.com: fixed some typos
+  . Make_vms.com: msdos/Makefile.*: removed zutil.h from some dependency lists
+  . msdos/Makefile.msc: remove "default rtl link library" info from obj files
+  . msdos/Makefile.*: use model-dependent name for the built zlib library
+  . msdos/Makefile.emx, nt/Makefile.emx, nt/Makefile.gcc:
+     new makefiles, for emx (DOS/OS2), emx&rsxnt and mingw32 (Windows 9x / NT)
+- use define instead of typedef for Bytef also for MSC small/medium (Tom Lane)
+- replace __far with _far for better portability (Christian Spieler, Tom Lane)
+- fix test for errno.h in configure (Tim Newsham)
+
+Changes in 1.1.2 (19 March 98)
+- added contrib/minzip, mini zip and unzip based on zlib (Gilles Vollant)
+  See http://www.winimage.com/zLibDll/unzip.html
+- preinitialize the inflate tables for fixed codes, to make the code
+  completely thread safe (Mark)
+- some simplifications and slight speed-up to the inflate code (Mark)
+- fix gzeof on non-compressed files (Allan Schrum)
+- add -std1 option in configure for OSF1 to fix gzprintf (Martin Mokrejs)
+- use default value of 4K for Z_BUFSIZE for 16-bit MSDOS (Tim Wegner + Glenn)
+- added os2/Makefile.def and os2/zlib.def (Andrew Zabolotny)
+- add shared lib support for UNIX_SV4.2MP (MATSUURA Takanori)
+- do not wrap extern "C" around system includes (Tom Lane)
+- mention zlib binding for TCL in README (Andreas Kupries)
+- added amiga/Makefile.pup for Amiga powerUP SAS/C PPC (Andreas Kleinert)
+- allow "make install prefix=..." even after configure (Glenn Randers-Pehrson)
+- allow "configure --prefix $HOME" (Tim Mooney)
+- remove warnings in example.c and gzio.c (Glenn Randers-Pehrson)
+- move Makefile.sas to amiga/Makefile.sas
+
+Changes in 1.1.1 (27 Feb 98)
+- fix macros _tr_tally_* in deflate.h for debug mode  (Glenn Randers-Pehrson)
+- remove block truncation heuristic which had very marginal effect for zlib
+  (smaller lit_bufsize than in gzip 1.2.4) and degraded a little the
+  compression ratio on some files. This also allows inlining _tr_tally for
+  matches in deflate_slow.
+- added msdos/Makefile.w32 for WIN32 Microsoft Visual C++ (Bob Frazier)
+
+Changes in 1.1.0 (24 Feb 98)
+- do not return STREAM_END prematurely in inflate (John Bowler)
+- revert to the zlib 1.0.8 inflate to avoid the gcc 2.8.0 bug (Jeremy Buhler)
+- compile with -DFASTEST to get compression code optimized for speed only
+- in minigzip, try mmap'ing the input file first (Miguel Albrecht)
+- increase size of I/O buffers in minigzip.c and gzio.c (not a big gain
+  on Sun but significant on HP)
+
+- add a pointer to experimental unzip library in README (Gilles Vollant)
+- initialize variable gcc in configure (Chris Herborth)
+
+Changes in 1.0.9 (17 Feb 1998)
+- added gzputs and gzgets functions
+- do not clear eof flag in gzseek (Mark Diekhans)
+- fix gzseek for files in transparent mode (Mark Diekhans)
+- do not assume that vsprintf returns the number of bytes written (Jens Krinke)
+- replace EXPORT with ZEXPORT to avoid conflict with other programs
+- added compress2 in zconf.h, zlib.def, zlib.dnt
+- new asm code from Gilles Vollant in contrib/asm386
+- simplify the inflate code (Mark):
+ . Replace ZALLOC's in huft_build() with single ZALLOC in inflate_blocks_new()
+ . ZALLOC the length list in inflate_trees_fixed() instead of using stack
+ . ZALLOC the value area for huft_build() instead of using stack
+ . Simplify Z_FINISH check in inflate()
+
+- Avoid gcc 2.8.0 comparison bug a little differently than zlib 1.0.8
+- in inftrees.c, avoid cc -O bug on HP (Farshid Elahi)
+- in zconf.h move the ZLIB_DLL stuff earlier to avoid problems with
+  the declaration of FAR (Gilles VOllant)
+- install libz.so* with mode 755 (executable) instead of 644 (Marc Lehmann)
+- read_buf buf parameter of type Bytef* instead of charf*
+- zmemcpy parameters are of type Bytef*, not charf* (Joseph Strout)
+- do not redeclare unlink in minigzip.c for WIN32 (John Bowler)
+- fix check for presence of directories in "make install" (Ian Willis)
+
+Changes in 1.0.8 (27 Jan 1998)
+- fixed offsets in contrib/asm386/gvmat32.asm (Gilles Vollant)
+- fix gzgetc and gzputc for big endian systems (Markus Oberhumer)
+- added compress2() to allow setting the compression level
+- include sys/types.h to get off_t on some systems (Marc Lehmann & QingLong)
+- use constant arrays for the static trees in trees.c instead of computing
+  them at run time (thanks to Ken Raeburn for this suggestion). To create
+  trees.h, compile with GEN_TREES_H and run "make test".
+- check return code of example in "make test" and display result
+- pass minigzip command line options to file_compress
+- simplifying code of inflateSync to avoid gcc 2.8 bug
+
+- support CC="gcc -Wall" in configure -s (QingLong)
+- avoid a flush caused by ftell in gzopen for write mode (Ken Raeburn)
+- fix test for shared library support to avoid compiler warnings
+- zlib.lib -> zlib.dll in msdos/zlib.rc (Gilles Vollant)
+- check for TARGET_OS_MAC in addition to MACOS (Brad Pettit)
+- do not use fdopen for Metrowerks on Mac (Brad Pettit))
+- add checks for gzputc and gzputc in example.c
+- avoid warnings in gzio.c and deflate.c (Andreas Kleinert)
+- use const for the CRC table (Ken Raeburn)
+- fixed "make uninstall" for shared libraries
+- use Tracev instead of Trace in infblock.c
+- in example.c use correct compressed length for test_sync
+- suppress +vnocompatwarnings in configure for HPUX (not always supported)
+
+Changes in 1.0.7 (20 Jan 1998)
+- fix gzseek which was broken in write mode
+- return error for gzseek to negative absolute position
+- fix configure for Linux (Chun-Chung Chen)
+- increase stack space for MSC (Tim Wegner)
+- get_crc_table and inflateSyncPoint are EXPORTed (Gilles Vollant)
+- define EXPORTVA for gzprintf (Gilles Vollant)
+- added man page zlib.3 (Rick Rodgers)
+- for contrib/untgz, fix makedir() and improve Makefile
+
+- check gzseek in write mode in example.c
+- allocate extra buffer for seeks only if gzseek is actually called
+- avoid signed/unsigned comparisons (Tim Wegner, Gilles Vollant)
+- add inflateSyncPoint in zconf.h
+- fix list of exported functions in nt/zlib.dnt and mdsos/zlib.def
+
+Changes in 1.0.6 (19 Jan 1998)
+- add functions gzprintf, gzputc, gzgetc, gztell, gzeof, gzseek, gzrewind and
+  gzsetparams (thanks to Roland Giersig and Kevin Ruland for some of this code)
+- Fix a deflate bug occuring only with compression level 0 (thanks to
+  Andy Buckler for finding this one).
+- In minigzip, pass transparently also the first byte for .Z files.
+- return Z_BUF_ERROR instead of Z_OK if output buffer full in uncompress()
+- check Z_FINISH in inflate (thanks to Marc Schluper)
+- Implement deflateCopy (thanks to Adam Costello)
+- make static libraries by default in configure, add --shared option.
+- move MSDOS or Windows specific files to directory msdos
+- suppress the notion of partial flush to simplify the interface
+  (but the symbol Z_PARTIAL_FLUSH is kept for compatibility with 1.0.4)
+- suppress history buffer provided by application to simplify the interface
+  (this feature was not implemented anyway in 1.0.4)
+- next_in and avail_in must be initialized before calling inflateInit or
+  inflateInit2
+- add EXPORT in all exported functions (for Windows DLL)
+- added Makefile.nt (thanks to Stephen Williams)
+- added the unsupported "contrib" directory:
+   contrib/asm386/ by Gilles Vollant <info@winimage.com>
+	386 asm code replacing longest_match().
+   contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
+        A C++ I/O streams interface to the zlib gz* functions
+   contrib/iostream2/  by Tyge Løvset <Tyge.Lovset@cmr.no>
+	Another C++ I/O streams interface
+   contrib/untgz/  by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
+	A very simple tar.gz file extractor using zlib
+   contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
+        How to use compress(), uncompress() and the gz* functions from VB.
+- pass params -f (filtered data), -h (huffman only), -1 to -9 (compression
+  level) in minigzip (thanks to Tom Lane)
+
+- use const for rommable constants in deflate
+- added test for gzseek and gztell in example.c
+- add undocumented function inflateSyncPoint() (hack for Paul Mackerras)
+- add undocumented function zError to convert error code to string
+  (for Tim Smithers)
+- Allow compilation of gzio with -DNO_DEFLATE to avoid the compression code.
+- Use default memcpy for Symantec MSDOS compiler.
+- Add EXPORT keyword for check_func (needed for Windows DLL)
+- add current directory to LD_LIBRARY_PATH for "make test"
+- create also a link for libz.so.1
+- added support for FUJITSU UXP/DS (thanks to Toshiaki Nomura)
+- use $(SHAREDLIB) instead of libz.so in Makefile.in (for HPUX)
+- added -soname for Linux in configure (Chun-Chung Chen,
+- assign numbers to the exported functions in zlib.def (for Windows DLL)
+- add advice in zlib.h for best usage of deflateSetDictionary
+- work around compiler bug on Atari (cast Z_NULL in call of s->checkfn)
+- allow compilation with ANSI keywords only enabled for TurboC in large model
+- avoid "versionString"[0] (Borland bug)
+- add NEED_DUMMY_RETURN for Borland
+- use variable z_verbose for tracing in debug mode (L. Peter Deutsch).
+- allow compilation with CC
+- defined STDC for OS/2 (David Charlap)	
+- limit external names to 8 chars for MVS (Thomas Lund)
+- in minigzip.c, use static buffers only for 16-bit systems
+- fix suffix check for "minigzip -d foo.gz"
+- do not return an error for the 2nd of two consecutive gzflush() (Felix Lee)
+- use _fdopen instead of fdopen for MSC >= 6.0 (Thomas Fanslau)
+- added makelcc.bat for lcc-win32 (Tom St Denis)
+- in Makefile.dj2, use copy and del instead of install and rm (Frank Donahoe)
+- Avoid expanded $Id: ChangeLog,v 1.1 2004/10/08 09:44:20 const_k Exp $. Use "rcs -kb" or "cvs admin -kb" to avoid Id expansion.
+- check for unistd.h in configure (for off_t)
+- remove useless check parameter in inflate_blocks_free
+- avoid useless assignment of s->check to itself in inflate_blocks_new
+- do not flush twice in gzclose (thanks to Ken Raeburn)
+- rename FOPEN as F_OPEN to avoid clash with /usr/include/sys/file.h
+- use NO_ERRNO_H instead of enumeration of operating systems with errno.h
+- work around buggy fclose on pipes for HP/UX
+- support zlib DLL with BORLAND C++ 5.0 (thanks to Glenn Randers-Pehrson)
+- fix configure if CC is already equal to gcc
+
+Changes in 1.0.5 (3 Jan 98)
+- Fix inflate to terminate gracefully when fed corrupted or invalid data
+- Use const for rommable constants in inflate
+- Eliminate memory leaks on error conditions in inflate
+- Removed some vestigial code in inflate
+- Update web address in README
+  
+Changes in 1.0.4 (24 Jul 96)
+- In very rare conditions, deflate(s, Z_FINISH) could fail to produce an EOF
+  bit, so the decompressor could decompress all the correct data but went
+  on to attempt decompressing extra garbage data. This affected minigzip too.
+- zlibVersion and gzerror return const char* (needed for DLL)
+- port to RISCOS (no fdopen, no multiple dots, no unlink, no fileno)
+- use z_error only for DEBUG (avoid problem with DLLs)
+
+Changes in 1.0.3 (2 Jul 96)
+- use z_streamp instead of z_stream *, which is now a far pointer in MSDOS
+  small and medium models; this makes the library incompatible with previous
+  versions for these models. (No effect in large model or on other systems.)
+- return OK instead of BUF_ERROR if previous deflate call returned with
+  avail_out as zero but there is nothing to do
+- added memcmp for non STDC compilers
+- define NO_DUMMY_DECL for more Mac compilers (.h files merged incorrectly)
+- define __32BIT__ if __386__ or i386 is defined (pb. with Watcom and SCO)
+- better check for 16-bit mode MSC (avoids problem with Symantec)
+
+Changes in 1.0.2 (23 May 96)
+- added Windows DLL support
+- added a function zlibVersion (for the DLL support)
+- fixed declarations using Bytef in infutil.c (pb with MSDOS medium model)
+- Bytef is define's instead of typedef'd only for Borland C
+- avoid reading uninitialized memory in example.c
+- mention in README that the zlib format is now RFC1950
+- updated Makefile.dj2
+- added algorithm.doc
+
+Changes in 1.0.1 (20 May 96) [1.0 skipped to avoid confusion]
+- fix array overlay in deflate.c which sometimes caused bad compressed data
+- fix inflate bug with empty stored block
+- fix MSDOS medium model which was broken in 0.99
+- fix deflateParams() which could generated bad compressed data.
+- Bytef is define'd instead of typedef'ed (work around Borland bug)
+- added an INDEX file
+- new makefiles for DJGPP (Makefile.dj2), 32-bit Borland (Makefile.b32),
+  Watcom (Makefile.wat), Amiga SAS/C (Makefile.sas)
+- speed up adler32 for modern machines without auto-increment
+- added -ansi for IRIX in configure
+- static_init_done in trees.c is an int
+- define unlink as delete for VMS
+- fix configure for QNX
+- add configure branch for SCO and HPUX
+- avoid many warnings (unused variables, dead assignments, etc...)
+- no fdopen for BeOS
+- fix the Watcom fix for 32 bit mode (define FAR as empty)
+- removed redefinition of Byte for MKWERKS
+- work around an MWKERKS bug (incorrect merge of all .h files)
+
+Changes in 0.99 (27 Jan 96)
+- allow preset dictionary shared between compressor and decompressor
+- allow compression level 0 (no compression)
+- add deflateParams in zlib.h: allow dynamic change of compression level
+  and compression strategy.
+- test large buffers and deflateParams in example.c
+- add optional "configure" to build zlib as a shared library
+- suppress Makefile.qnx, use configure instead
+- fixed deflate for 64-bit systems (detected on Cray)
+- fixed inflate_blocks for 64-bit systems (detected on Alpha)
+- declare Z_DEFLATED in zlib.h (possible parameter for deflateInit2)
+- always return Z_BUF_ERROR when deflate() has nothing to do
+- deflateInit and inflateInit are now macros to allow version checking
+- prefix all global functions and types with z_ with -DZ_PREFIX
+- make falloc completely reentrant (inftrees.c)
+- fixed very unlikely race condition in ct_static_init
+- free in reverse order of allocation to help memory manager
+- use zlib-1.0/* instead of zlib/* inside the tar.gz
+- make zlib warning-free with "gcc -O3 -Wall -Wwrite-strings -Wpointer-arith
+  -Wconversion -Wstrict-prototypes -Wmissing-prototypes"
+- allow gzread on concatenated .gz files
+- deflateEnd now returns Z_DATA_ERROR if it was premature
+- deflate is finally (?) fully deterministic (no matches beyond end of input)
+- Document Z_SYNC_FLUSH
+- add uninstall in Makefile
+- Check for __cpluplus in zlib.h
+- Better test in ct_align for partial flush
+- avoid harmless warnings for Borland C++
+- initialize hash_head in deflate.c
+- avoid warning on fdopen (gzio.c) for HP cc -Aa
+- include stdlib.h for STDC compilers
+- include errno.h for Cray
+- ignore error if ranlib doesn't exist
+- call ranlib twice for NeXTSTEP
+- use exec_prefix instead of prefix for libz.a
+- renamed ct_* as _tr_* to avoid conflict with applications
+- clear z->msg in inflateInit2 before any error return
+- initialize opaque in example.c, gzio.c, deflate.c and inflate.c
+- fixed typo in zconf.h (_GNUC__ => __GNUC__)
+- check for WIN32 in zconf.h and zutil.c (avoid farmalloc in 32-bit mode)
+- fix typo in Make_vms.com (f$trnlnm -> f$getsyi)
+- in fcalloc, normalize pointer if size > 65520 bytes
+- don't use special fcalloc for 32 bit Borland C++
+- use STDC instead of __GO32__ to avoid redeclaring exit, calloc, etc...
+- use Z_BINARY instead of BINARY
+- document that gzclose after gzdopen will close the file
+- allow "a" as mode in gzopen.
+- fix error checking in gzread
+- allow skipping .gz extra-field on pipes
+- added reference to Perl interface in README
+- put the crc table in FAR data (I dislike more and more the medium model :)
+- added get_crc_table
+- added a dimension to all arrays (Borland C can't count).
+- workaround Borland C bug in declaration of inflate_codes_new & inflate_fast
+- guard against multiple inclusion of *.h (for precompiled header on Mac)
+- Watcom C pretends to be Microsoft C small model even in 32 bit mode.
+- don't use unsized arrays to avoid silly warnings by Visual C++:
+     warning C4746: 'inflate_mask' : unsized array treated as  '__far'
+     (what's wrong with far data in far model?).
+- define enum out of inflate_blocks_state to allow compilation with C++
+
+Changes in 0.95 (16 Aug 95)
+- fix MSDOS small and medium model (now easier to adapt to any compiler)
+- inlined send_bits
+- fix the final (:-) bug for deflate with flush (output was correct but
+  not completely flushed in rare occasions).
+- default window size is same for compression and decompression
+  (it's now sufficient to set MAX_WBITS in zconf.h).
+- voidp -> voidpf and voidnp -> voidp (for consistency with other
+  typedefs and because voidnp was not near in large model).
+
+Changes in 0.94 (13 Aug 95)
+- support MSDOS medium model
+- fix deflate with flush (could sometimes generate bad output)
+- fix deflateReset (zlib header was incorrectly suppressed)
+- added support for VMS
+- allow a compression level in gzopen()
+- gzflush now calls fflush
+- For deflate with flush, flush even if no more input is provided.
+- rename libgz.a as libz.a
+- avoid complex expression in infcodes.c triggering Turbo C bug
+- work around a problem with gcc on Alpha (in INSERT_STRING)
+- don't use inline functions (problem with some gcc versions)
+- allow renaming of Byte, uInt, etc... with #define.
+- avoid warning about (unused) pointer before start of array in deflate.c
+- avoid various warnings in gzio.c, example.c, infblock.c, adler32.c, zutil.c
+- avoid reserved word 'new' in trees.c
+
+Changes in 0.93 (25 June 95)
+- temporarily disable inline functions
+- make deflate deterministic
+- give enough lookahead for PARTIAL_FLUSH
+- Set binary mode for stdin/stdout in minigzip.c for OS/2
+- don't even use signed char in inflate (not portable enough)
+- fix inflate memory leak for segmented architectures
+
+Changes in 0.92 (3 May 95)
+- don't assume that char is signed (problem on SGI)
+- Clear bit buffer when starting a stored block
+- no memcpy on Pyramid
+- suppressed inftest.c
+- optimized fill_window, put longest_match inline for gcc
+- optimized inflate on stored blocks.
+- untabify all sources to simplify patches
+
+Changes in 0.91 (2 May 95)
+- Default MEM_LEVEL is 8 (not 9 for Unix) as documented in zlib.h
+- Document the memory requirements in zconf.h
+- added "make install"
+- fix sync search logic in inflateSync
+- deflate(Z_FULL_FLUSH) now works even if output buffer too short
+- after inflateSync, don't scare people with just "lo world"
+- added support for DJGPP
+
+Changes in 0.9 (1 May 95)
+- don't assume that zalloc clears the allocated memory (the TurboC bug
+  was Mark's bug after all :)
+- let again gzread copy uncompressed data unchanged (was working in 0.71)
+- deflate(Z_FULL_FLUSH), inflateReset and inflateSync are now fully implemented
+- added a test of inflateSync in example.c
+- moved MAX_WBITS to zconf.h because users might want to change that.
+- document explicitly that zalloc(64K) on MSDOS must return a normalized
+  pointer (zero offset)
+- added Makefiles for Microsoft C, Turbo C, Borland C++
+- faster crc32()
+
+Changes in 0.8 (29 April 95)
+- added fast inflate (inffast.c)
+- deflate(Z_FINISH) now returns Z_STREAM_END when done. Warning: this
+  is incompatible with previous versions of zlib which returned Z_OK.
+- work around a TurboC compiler bug (bad code for b << 0, see infutil.h)
+  (actually that was not a compiler bug, see 0.81 above)
+- gzread no longer reads one extra byte in certain cases
+- In gzio destroy(), don't reference a freed structure
+- avoid many warnings for MSDOS
+- avoid the ERROR symbol which is used by MS Windows
+
+Changes in 0.71 (14 April 95)
+- Fixed more MSDOS compilation problems :( There is still a bug with
+  TurboC large model.
+
+Changes in 0.7 (14 April 95)
+- Added full inflate support.
+- Simplified the crc32() interface. The pre- and post-conditioning
+  (one's complement) is now done inside crc32(). WARNING: this is
+  incompatible with previous versions; see zlib.h for the new usage.
+
+Changes in 0.61 (12 April 95)
+- workaround for a bug in TurboC. example and minigzip now work on MSDOS.
+
+Changes in 0.6 (11 April 95)
+- added minigzip.c
+- added gzdopen to reopen a file descriptor as gzFile
+- added transparent reading of non-gziped files in gzread.
+- fixed bug in gzread (don't read crc as data)
+- fixed bug in destroy (gzio.c) (don't return Z_STREAM_END for gzclose).
+- don't allocate big arrays in the stack (for MSDOS)
+- fix some MSDOS compilation problems
+
+Changes in 0.5:
+- do real compression in deflate.c. Z_PARTIAL_FLUSH is supported but
+  not yet Z_FULL_FLUSH.
+- support decompression but only in a single step (forced Z_FINISH)
+- added opaque object for zalloc and zfree.
+- added deflateReset and inflateReset
+- added a variable zlib_version for consistency checking.
+- renamed the 'filter' parameter of deflateInit2 as 'strategy'.
+  Added Z_FILTERED and Z_HUFFMAN_ONLY constants.
+
+Changes in 0.4:
+- avoid "zip" everywhere, use zlib instead of ziplib.
+- suppress Z_BLOCK_FLUSH, interpret Z_PARTIAL_FLUSH as block flush
+  if compression method == 8.
+- added adler32 and crc32
+- renamed deflateOptions as deflateInit2, call one or the other but not both
+- added the method parameter for deflateInit2.
+- added inflateInit2
+- simplied considerably deflateInit and inflateInit by not supporting
+  user-provided history buffer. This is supported only in deflateInit2
+  and inflateInit2.
+
+Changes in 0.3:
+- prefix all macro names with Z_
+- use Z_FINISH instead of deflateEnd to finish compression.
+- added Z_HUFFMAN_ONLY
+- added gzerror()
diff --git a/common/zlib/FAQ b/common/zlib/FAQ
new file mode 100644
index 00000000..47a7d60c
--- /dev/null
+++ b/common/zlib/FAQ
@@ -0,0 +1,100 @@
+
+		Frequently Asked Questions about zlib
+
+
+If your question is not there, please check the zlib home page 
+http://www.zlib.org which may have more recent information.
+The lastest zlib FAQ is at http://www.gzip.org/zlib/zlib_faq.html
+
+
+ 1. Is zlib Y2K-compliant?
+
+    Yes. zlib doesn't handle dates.
+
+ 2. Where can I get a Windows DLL version?
+
+    The zlib sources can be compiled without change to produce a DLL. If you
+    want a precompiled DLL, see http://www.winimage.com/zLibDll/ . Questions
+    about the zlib DLL should be sent to Gilles Vollant (info@winimage.com).
+
+ 3. Where can I get a Visual Basic interface to zlib?
+
+    See
+        * http://www.winimage.com/zLibDll/cmp-z-it.zip
+        * http://www.dogma.net/markn/articles/zlibtool/zlibtool.htm
+        * contrib/visual-basic.txt in the zlib distribution
+
+ 4. compress() returns Z_BUF_ERROR
+
+    Make sure that before the call of compress, the length of the compressed
+    buffer is equal to the total size of the compressed buffer and not
+    zero. For Visual Basic, check that this parameter is passed by reference
+    ("as any"), not by value ("as long").
+
+ 5. deflate() or inflate() returns Z_BUF_ERROR
+
+    Before making the call, make sure that avail_in and avail_out are not
+    zero. When setting the parameter flush equal to Z_FINISH, also make sure
+    that avail_out is big enough to allow processing all pending input.
+
+ 6. Where's the zlib documentation (man pages, etc.)?
+
+    It's in zlib.h for the moment, and Francis S. Lin has converted it to a
+    web page zlib.html. Volunteers to transform this to Unix-style man pages,
+    please contact Jean-loup Gailly (jloup@gzip.org). Examples of zlib usage
+    are in the files example.c and minigzip.c.
+
+ 7. Why don't you use GNU autoconf or libtool or ...?
+
+    Because we would like to keep zlib as a very small and simple
+    package. zlib is rather portable and doesn't need much configuration.
+
+ 8. I found a bug in zlib.
+
+    Most of the time, such problems are due to an incorrect usage of
+    zlib. Please try to reproduce the problem with a small program and send
+    the corresponding source to us at zlib@gzip.org . Do not send
+    multi-megabyte data files without prior agreement.
+
+ 9. Why do I get "undefined reference to gzputc"?
+
+    If "make test" produces something like
+
+       example.o(.text+0x154): undefined reference to `gzputc'
+      
+    check that you don't have old files libz.* in /usr/lib, /usr/local/lib or
+    /usr/X11R6/lib. Remove any old versions, then do "make install".
+
+10. I need a Delphi interface to zlib.
+
+    See the directories contrib/delphi and contrib/delphi2 in the zlib
+    distribution.
+
+11. Can zlib handle .zip archives?
+
+    See the directory contrib/minizip in the zlib distribution.
+
+12. Can zlib handle .Z files?
+
+    No, sorry. You have to spawn an uncompress or gunzip subprocess, or adapt
+    the code of uncompress on your own.
+
+13. How can I make a Unix shared library?
+
+    make clean
+    ./configure -s
+    make
+
+14. Why does "make test" fail on Mac OS X?
+
+    Mac OS X already includes zlib as a shared library, and so -lz links the
+    shared library instead of the one that the "make" compiled. For zlib
+    1.1.3, the two are incompatible due to different compile-time
+    options. Simply change the -lz in the Makefile to libz.a, and it will use
+    the compiled library instead of the shared one and the "make test" will
+    succeed.
+
+15. I have a question about OttoPDF
+
+    We are not the authors of OttoPDF. The real author is on the OttoPDF web
+    site Joel Hainley jhainley@myndkryme.com.
diff --git a/common/zlib/INDEX b/common/zlib/INDEX
new file mode 100644
index 00000000..8a245766
--- /dev/null
+++ b/common/zlib/INDEX
@@ -0,0 +1,86 @@
+ChangeLog		history of changes
+INDEX			this file
+FAQ			Frequently Asked Questions about zlib
+Make_vms.com		script for Vax/VMS
+Makefile		makefile for Unix (generated by configure)
+Makefile.in		makefile for Unix (template for configure)
+Makefile.riscos 	makefile for RISCOS
+README			guess what
+algorithm.txt		description of the (de)compression algorithm
+configure		configure script for Unix
+descrip.mms		makefile for Vax/VMS
+zlib.3			mini man page for zlib (volunteers to write full
+			man pages from zlib.h welcome. write to jloup@gzip.org)
+
+amiga/Makefile.sas	makefile for Amiga SAS/C
+amiga/Makefile.pup      makefile for Amiga powerUP SAS/C PPC
+
+msdos/Makefile.w32      makefile for Microsoft Visual C++ 32-bit
+msdos/Makefile.b32	makefile for Borland C++   32-bit
+msdos/Makefile.bor	makefile for Borland C/C++ 16-bit
+msdos/Makefile.dj2	makefile for DJGPP 2.x
+msdos/Makefile.emx	makefile for EMX 0.9c (32-bit DOS/OS2)
+msdos/Makefile.msc	makefile for Microsoft C 16-bit
+msdos/Makefile.tc	makefile for Turbo C
+msdos/Makefile.wat	makefile for Watcom C
+msdos/zlib.def        	definition file for Windows DLL
+msdos/zlib.rc         	definition file for Windows DLL
+
+nt/Makefile.nt		makefile for Windows NT
+nt/zlib.dnt		definition file for Windows NT DLL
+nt/Makefile.emx		makefile for EMX 0.9c/RSXNT 1.41 (Win32 Intel)
+nt/Makefile.gcc		makefile for Windows NT using GCC (mingw32)
+
+
+		zlib public header files (must be kept):
+zconf.h
+zlib.h
+
+		private source files used to build the zlib library:
+adler32.c
+compress.c
+crc32.c
+deflate.c
+deflate.h
+gzio.c
+infblock.c
+infblock.h
+infcodes.c
+infcodes.h
+inffast.c
+inffast.h
+inflate.c
+inftrees.c
+inftrees.h
+infutil.c
+infutil.h
+maketree.c
+trees.c
+uncompr.c
+zutil.c
+zutil.h
+
+		source files for sample programs:
+example.c
+minigzip.c
+
+		unsupported contribution by third parties
+
+contrib/asm386/ by Gilles Vollant <info@winimage.com>
+	386 asm code replacing longest_match().
+
+contrib/minizip/ by Gilles Vollant <info@winimage.com>
+	Mini zip and unzip based on zlib
+        See http://www.winimage.com/zLibDll/unzip.html
+
+contrib/iostream/ by Kevin Ruland <kevin@rodin.wustl.edu>
+        A C++ I/O streams interface to the zlib gz* functions
+
+contrib/iostream2/  by Tyge Løvset <Tyge.Lovset@cmr.no>
+	Another C++ I/O streams interface
+
+contrib/untgz/  by "Pedro A. Aranda Guti\irrez" <paag@tid.es>
+	A very simple tar.gz extractor using zlib
+
+contrib/visual-basic.txt by Carlos Rios <c_rios@sonda.cl>
+        How to use compress(), uncompress() and the gz* functions from VB.
diff --git a/common/zlib/Make_vms.com b/common/zlib/Make_vms.com
new file mode 100644
index 00000000..1c57e8f0
--- /dev/null
+++ b/common/zlib/Make_vms.com
@@ -0,0 +1,115 @@
+$! make libz under VMS
+$! written by Martin P.J. Zinser <m.zinser@gsi.de>
+$!
+$! Look for the compiler used
+$!
+$ ccopt = ""
+$ if f$getsyi("HW_MODEL").ge.1024
+$ then
+$  ccopt = "/prefix=all"+ccopt
+$  comp  = "__decc__=1"
+$  if f$trnlnm("SYS").eqs."" then define sys sys$library:
+$ else
+$  if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs.""
+$   then
+$    comp  = "__vaxc__=1"
+$    if f$trnlnm("SYS").eqs."" then define sys sys$library:
+$   else
+$    if f$trnlnm("SYS").eqs."" then define sys decc$library_include:
+$    ccopt = "/decc/prefix=all"+ccopt
+$    comp  = "__decc__=1"
+$  endif
+$ endif
+$!
+$! Build the thing plain or with mms
+$!
+$ write sys$output "Compiling Zlib sources ..."
+$ if f$search("SYS$SYSTEM:MMS.EXE").eqs.""
+$  then
+$   dele example.obj;*,minigzip.obj;*
+$   CALL MAKE adler32.OBJ "CC ''CCOPT' adler32" -
+                adler32.c zlib.h zconf.h
+$   CALL MAKE compress.OBJ "CC ''CCOPT' compress" -
+                compress.c zlib.h zconf.h
+$   CALL MAKE crc32.OBJ "CC ''CCOPT' crc32" -
+                crc32.c zlib.h zconf.h
+$   CALL MAKE deflate.OBJ "CC ''CCOPT' deflate" -
+                deflate.c deflate.h zutil.h zlib.h zconf.h
+$   CALL MAKE gzio.OBJ "CC ''CCOPT' gzio" -
+                gzio.c zutil.h zlib.h zconf.h
+$   CALL MAKE infblock.OBJ "CC ''CCOPT' infblock" -
+                infblock.c zutil.h zlib.h zconf.h infblock.h
+$   CALL MAKE infcodes.OBJ "CC ''CCOPT' infcodes" -
+                infcodes.c zutil.h zlib.h zconf.h inftrees.h
+$   CALL MAKE inffast.OBJ "CC ''CCOPT' inffast" -
+                inffast.c zutil.h zlib.h zconf.h inffast.h
+$   CALL MAKE inflate.OBJ "CC ''CCOPT' inflate" -
+                inflate.c zutil.h zlib.h zconf.h infblock.h
+$   CALL MAKE inftrees.OBJ "CC ''CCOPT' inftrees" -
+                inftrees.c zutil.h zlib.h zconf.h inftrees.h
+$   CALL MAKE infutil.OBJ "CC ''CCOPT' infutil" -
+                infutil.c zutil.h zlib.h zconf.h inftrees.h infutil.h
+$   CALL MAKE trees.OBJ "CC ''CCOPT' trees" -
+                trees.c deflate.h zutil.h zlib.h zconf.h
+$   CALL MAKE uncompr.OBJ "CC ''CCOPT' uncompr" -
+                uncompr.c zlib.h zconf.h
+$   CALL MAKE zutil.OBJ "CC ''CCOPT' zutil" -
+                zutil.c zutil.h zlib.h zconf.h
+$   write sys$output "Building Zlib ..."
+$   CALL MAKE libz.OLB "lib/crea libz.olb *.obj" *.OBJ
+$   write sys$output "Building example..."
+$   CALL MAKE example.OBJ "CC ''CCOPT' example" -
+                example.c zlib.h zconf.h
+$   call make example.exe "LINK example,libz.olb/lib" example.obj libz.olb
+$   write sys$output "Building minigzip..."
+$   CALL MAKE minigzip.OBJ "CC ''CCOPT' minigzip" -
+                minigzip.c zlib.h zconf.h
+$   call make minigzip.exe - 
+                "LINK minigzip,libz.olb/lib,x11vms:xvmsutils.olb/lib" - 
+                minigzip.obj libz.olb
+$  else
+$   mms/macro=('comp')
+$  endif
+$ write sys$output "Zlib build completed"
+$ exit
+$!
+$!
+$MAKE: SUBROUTINE   !SUBROUTINE TO CHECK DEPENDENCIES
+$ V = 'F$Verify(0)
+$! P1 = What we are trying to make
+$! P2 = Command to make it
+$! P3 - P8  What it depends on
+$
+$ If F$Search(P1) .Eqs. "" Then Goto Makeit
+$ Time = F$CvTime(F$File(P1,"RDT"))
+$arg=3
+$Loop:
+$       Argument = P'arg
+$       If Argument .Eqs. "" Then Goto Exit
+$       El=0
+$Loop2:
+$       File = F$Element(El," ",Argument)
+$       If File .Eqs. " " Then Goto Endl
+$       AFile = ""
+$Loop3:
+$       OFile = AFile
+$       AFile = F$Search(File)
+$       If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl
+$       If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit
+$       Goto Loop3
+$NextEL:
+$       El = El + 1
+$       Goto Loop2
+$EndL:
+$ arg=arg+1
+$ If arg .Le. 8 Then Goto Loop
+$ Goto Exit
+$
+$Makeit:
+$ VV=F$VERIFY(0)
+$ write sys$output P2
+$ 'P2
+$ VV='F$Verify(VV)
+$Exit:
+$ If V Then Set Verify
+$ENDSUBROUTINE
diff --git a/common/zlib/Makefile.in b/common/zlib/Makefile.in
new file mode 100644
index 00000000..531562b2
--- /dev/null
+++ b/common/zlib/Makefile.in
@@ -0,0 +1,175 @@
+# Makefile for zlib
+# Copyright (C) 1995-2002 Jean-loup Gailly.
+# For conditions of distribution and use, see copyright notice in zlib.h 
+
+# To compile and test, type:
+#   ./configure; make test
+# The call of configure is optional if you don't have special requirements
+# If you wish to build zlib as a shared library, use: ./configure -s
+
+# To install /usr/local/lib/libz.* and /usr/local/include/zlib.h, type:
+#    make install
+# To install in $HOME instead of /usr/local, use:
+#    make install prefix=$HOME
+
+CC=cc
+
+CFLAGS=-O
+#CFLAGS=-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7
+#CFLAGS=-g -DDEBUG
+#CFLAGS=-O3 -Wall -Wwrite-strings -Wpointer-arith -Wconversion \
+#           -Wstrict-prototypes -Wmissing-prototypes
+
+LDFLAGS=-L. -lz
+LDSHARED=$(CC)
+CPP=$(CC) -E
+
+VER=1.1.4
+LIBS=libz.a
+SHAREDLIB=libz.so
+
+AR=ar rc
+RANLIB=ranlib
+TAR=tar
+SHELL=/bin/sh
+
+prefix = /usr/local
+exec_prefix = ${prefix}
+libdir = ${exec_prefix}/lib
+includedir = ${prefix}/include
+
+OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
+       zutil.o inflate.o infblock.o inftrees.o infcodes.o infutil.o inffast.o
+
+OBJA =
+# to use the asm code: make OBJA=match.o
+
+TEST_OBJS = example.o minigzip.o
+
+DISTFILES = README FAQ INDEX ChangeLog configure Make*[a-z0-9] *.[ch] *.mms \
+  algorithm.txt zlib.3 zlib.html \
+  msdos/Make*[a-z0-9] msdos/zlib.def msdos/zlib.rc \
+  nt/Make*[a-z0-9] nt/zlib.dnt amiga/Make*.??? os2/M*.os2 os2/zlib.def \
+  contrib/RE*.contrib contrib/*.txt contrib/asm386/*.asm contrib/asm386/*.c \
+  contrib/asm386/*.bat contrib/asm386/zlibvc.d?? contrib/asm[56]86/*.?86 \
+  contrib/asm[56]86/*.S contrib/iostream/*.cpp \
+  contrib/iostream/*.h  contrib/iostream2/*.h contrib/iostream2/*.cpp \
+  contrib/untgz/Makefile contrib/untgz/*.c contrib/untgz/*.w32 \
+  contrib/minizip/[CM]*[pe] contrib/minizip/*.[ch] contrib/minizip/*.[td]?? \
+  contrib/delphi*/*.???
+
+all: example minigzip
+
+test: all
+	@LD_LIBRARY_PATH=.:$(LD_LIBRARY_PATH) ; export LD_LIBRARY_PATH; \
+	echo hello world | ./minigzip | ./minigzip -d || \
+	  echo '		*** minigzip test FAILED ***' ; \
+	if ./example; then \
+	  echo '		*** zlib test OK ***'; \
+	else \
+	  echo '		*** zlib test FAILED ***'; \
+	fi
+
+libz.a: $(OBJS) $(OBJA)
+	$(AR) $@ $(OBJS) $(OBJA)
+	-@ ($(RANLIB) $@ || true) >/dev/null 2>&1
+
+match.o: match.S
+	$(CPP) match.S > _match.s
+	$(CC) -c _match.s
+	mv _match.o match.o
+	rm -f _match.s
+
+$(SHAREDLIB).$(VER): $(OBJS)
+	$(LDSHARED) -o $@ $(OBJS)
+	rm -f $(SHAREDLIB) $(SHAREDLIB).1
+	ln -s $@ $(SHAREDLIB)
+	ln -s $@ $(SHAREDLIB).1
+
+example: example.o $(LIBS)
+	$(CC) $(CFLAGS) -o $@ example.o $(LDFLAGS)
+
+minigzip: minigzip.o $(LIBS)
+	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
+
+install: $(LIBS)
+	-@if [ ! -d $(includedir)  ]; then mkdir $(includedir); fi
+	-@if [ ! -d $(libdir) ]; then mkdir $(libdir); fi
+	cp zlib.h zconf.h $(includedir)
+	chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
+	cp $(LIBS) $(libdir)
+	cd $(libdir); chmod 755 $(LIBS)
+	-@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
+	cd $(libdir); if test -f $(SHAREDLIB).$(VER); then \
+	  rm -f $(SHAREDLIB) $(SHAREDLIB).1; \
+	  ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB); \
+	  ln -s $(SHAREDLIB).$(VER) $(SHAREDLIB).1; \
+	  (ldconfig || true)  >/dev/null 2>&1; \
+	fi
+# The ranlib in install is needed on NeXTSTEP which checks file times
+# ldconfig is for Linux
+
+uninstall:
+	cd $(includedir); \
+	v=$(VER); \
+	if test -f zlib.h; then \
+	  v=`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`; \
+          rm -f zlib.h zconf.h; \
+	fi; \
+	cd $(libdir); rm -f libz.a; \
+	if test -f $(SHAREDLIB).$$v; then \
+	  rm -f $(SHAREDLIB).$$v $(SHAREDLIB) $(SHAREDLIB).1; \
+	fi
+
+clean:
+	rm -f *.o *~ example minigzip libz.a libz.so* foo.gz so_locations \
+	   _match.s maketree
+
+distclean:	clean
+
+zip:
+	mv Makefile Makefile~; cp -p Makefile.in Makefile
+	rm -f test.c ztest*.c contrib/minizip/test.zip
+	v=`sed -n -e 's/\.//g' -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
+	zip -ul9 zlib$$v $(DISTFILES)
+	mv Makefile~ Makefile
+
+dist:
+	mv Makefile Makefile~; cp -p Makefile.in Makefile
+	rm -f test.c ztest*.c contrib/minizip/test.zip
+	d=zlib-`sed -n '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`;\
+	rm -f $$d.tar.gz; \
+	if test ! -d ../$$d; then rm -f ../$$d; ln -s `pwd` ../$$d; fi; \
+	files=""; \
+	for f in $(DISTFILES); do files="$$files $$d/$$f"; done; \
+	cd ..; \
+	GZIP=-9 $(TAR) chofz $$d/$$d.tar.gz $$files; \
+	if test ! -d $$d; then rm -f $$d; fi
+	mv Makefile~ Makefile
+
+tags:	
+	etags *.[ch]
+
+depend:
+	makedepend -- $(CFLAGS) -- *.[ch]
+
+# DO NOT DELETE THIS LINE -- make depend depends on it.
+
+adler32.o: zlib.h zconf.h
+compress.o: zlib.h zconf.h
+crc32.o: zlib.h zconf.h
+deflate.o: deflate.h zutil.h zlib.h zconf.h
+example.o: zlib.h zconf.h
+gzio.o: zutil.h zlib.h zconf.h
+infblock.o: infblock.h inftrees.h infcodes.h infutil.h zutil.h zlib.h zconf.h
+infcodes.o: zutil.h zlib.h zconf.h
+infcodes.o: inftrees.h infblock.h infcodes.h infutil.h inffast.h
+inffast.o: zutil.h zlib.h zconf.h inftrees.h
+inffast.o: infblock.h infcodes.h infutil.h inffast.h
+inflate.o: zutil.h zlib.h zconf.h infblock.h
+inftrees.o: zutil.h zlib.h zconf.h inftrees.h
+infutil.o: zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
+minigzip.o:  zlib.h zconf.h 
+trees.o: deflate.h zutil.h zlib.h zconf.h trees.h
+uncompr.o: zlib.h zconf.h
+zutil.o: zutil.h zlib.h zconf.h  
diff --git a/common/zlib/Makefile.riscos b/common/zlib/Makefile.riscos
new file mode 100644
index 00000000..d97f4492
--- /dev/null
+++ b/common/zlib/Makefile.riscos
@@ -0,0 +1,151 @@
+# Project:   zlib_1_03
+# Patched for zlib 1.1.2 rw@shadow.org.uk 19980430
+# test works out-of-the-box, installs `somewhere' on demand
+
+# Toolflags:
+CCflags = -c -depend !Depend -IC: -g -throwback  -DRISCOS  -fah 
+C++flags = -c -depend !Depend -IC: -throwback
+Linkflags = -aif -c++ -o $@ 
+ObjAsmflags = -throwback -NoCache -depend !Depend
+CMHGflags = 
+LibFileflags = -c -l -o $@ 
+Squeezeflags = -o $@
+
+# change the line below to where _you_ want the library installed.
+libdest = lib:zlib
+
+# Final targets:
+@.lib:   @.o.adler32 @.o.compress @.o.crc32 @.o.deflate @.o.gzio \
+        @.o.infblock @.o.infcodes @.o.inffast @.o.inflate @.o.inftrees @.o.infutil @.o.trees \
+        @.o.uncompr @.o.zutil 
+        LibFile $(LibFileflags) @.o.adler32 @.o.compress @.o.crc32 @.o.deflate \
+        @.o.gzio @.o.infblock @.o.infcodes @.o.inffast @.o.inflate @.o.inftrees @.o.infutil \
+        @.o.trees @.o.uncompr @.o.zutil 
+test:   @.minigzip @.example @.lib
+	@copy @.lib @.libc  A~C~DF~L~N~P~Q~RS~TV
+	@echo running tests: hang on.
+	@/@.minigzip -f -9 libc
+	@/@.minigzip -d libc-gz
+	@/@.minigzip -f -1 libc
+	@/@.minigzip -d libc-gz
+	@/@.minigzip -h -9 libc
+	@/@.minigzip -d libc-gz
+	@/@.minigzip -h -1 libc
+	@/@.minigzip -d libc-gz
+	@/@.minigzip -9 libc
+	@/@.minigzip -d libc-gz
+	@/@.minigzip -1 libc
+	@/@.minigzip -d libc-gz
+	@diff @.lib @.libc
+	@echo that should have reported '@.lib and @.libc identical' if you have diff.
+	@/@.example @.fred @.fred
+	@echo that will have given lots of hello!'s.
+
+@.minigzip:   @.o.minigzip @.lib C:o.Stubs 
+        Link $(Linkflags) @.o.minigzip @.lib C:o.Stubs 
+@.example:   @.o.example @.lib C:o.Stubs 
+        Link $(Linkflags) @.o.example @.lib C:o.Stubs
+
+install: @.lib
+	cdir $(libdest)
+	cdir $(libdest).h
+	@copy @.h.zlib $(libdest).h.zlib A~C~DF~L~N~P~Q~RS~TV
+	@copy @.h.zconf $(libdest).h.zconf A~C~DF~L~N~P~Q~RS~TV
+	@copy @.lib $(libdest).lib  A~C~DF~L~N~P~Q~RS~TV
+	@echo okay, installed zlib in $(libdest)
+
+clean:; remove @.minigzip
+	remove @.example
+	remove @.libc
+	-wipe @.o.* F~r~cV
+	remove @.fred
+
+# User-editable dependencies:
+.c.o:
+        cc $(ccflags) -o $@ $<
+
+# Static dependencies:
+
+# Dynamic dependencies:
+o.example:	c.example
+o.example:	h.zlib
+o.example:	h.zconf
+o.minigzip:	c.minigzip
+o.minigzip:	h.zlib
+o.minigzip:	h.zconf
+o.adler32:	c.adler32
+o.adler32:	h.zlib
+o.adler32:	h.zconf
+o.compress:	c.compress
+o.compress:	h.zlib
+o.compress:	h.zconf
+o.crc32:	c.crc32
+o.crc32:	h.zlib
+o.crc32:	h.zconf
+o.deflate:	c.deflate
+o.deflate:	h.deflate
+o.deflate:	h.zutil
+o.deflate:	h.zlib
+o.deflate:	h.zconf
+o.gzio:	c.gzio
+o.gzio:	h.zutil
+o.gzio:	h.zlib
+o.gzio:	h.zconf
+o.infblock:	c.infblock
+o.infblock:	h.zutil
+o.infblock:	h.zlib
+o.infblock:	h.zconf
+o.infblock:	h.infblock
+o.infblock:	h.inftrees
+o.infblock:	h.infcodes
+o.infblock:	h.infutil
+o.infcodes:	c.infcodes
+o.infcodes:	h.zutil
+o.infcodes:	h.zlib
+o.infcodes:	h.zconf
+o.infcodes:	h.inftrees
+o.infcodes:	h.infblock
+o.infcodes:	h.infcodes
+o.infcodes:	h.infutil
+o.infcodes:	h.inffast
+o.inffast:	c.inffast
+o.inffast:	h.zutil
+o.inffast:	h.zlib
+o.inffast:	h.zconf
+o.inffast:	h.inftrees
+o.inffast:	h.infblock
+o.inffast:	h.infcodes
+o.inffast:	h.infutil
+o.inffast:	h.inffast
+o.inflate:	c.inflate
+o.inflate:	h.zutil
+o.inflate:	h.zlib
+o.inflate:	h.zconf
+o.inflate:	h.infblock
+o.inftrees:	c.inftrees
+o.inftrees:	h.zutil
+o.inftrees:	h.zlib
+o.inftrees:	h.zconf
+o.inftrees:	h.inftrees
+o.inftrees:	h.inffixed
+o.infutil:	c.infutil
+o.infutil:	h.zutil
+o.infutil:	h.zlib
+o.infutil:	h.zconf
+o.infutil:	h.infblock
+o.infutil:	h.inftrees
+o.infutil:	h.infcodes
+o.infutil:	h.infutil
+o.trees:	c.trees
+o.trees:	h.deflate
+o.trees:	h.zutil
+o.trees:	h.zlib
+o.trees:	h.zconf
+o.trees:	h.trees
+o.uncompr:	c.uncompr
+o.uncompr:	h.zlib
+o.uncompr:	h.zconf
+o.zutil:	c.zutil
+o.zutil:	h.zutil
+o.zutil:	h.zlib
+o.zutil:	h.zconf
diff --git a/common/zlib/README b/common/zlib/README
new file mode 100644
index 00000000..29d67146
--- /dev/null
+++ b/common/zlib/README
@@ -0,0 +1,147 @@
+zlib 1.1.4 is a general purpose data compression library.  All the code
+is thread safe.  The data format used by the zlib library
+is described by RFCs (Request for Comments) 1950 to 1952 in the files 
+http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate
+format) and rfc1952.txt (gzip format). These documents are also available in
+other formats from ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
+
+All functions of the compression library are documented in the file zlib.h
+(volunteer to write man pages welcome, contact jloup@gzip.org). A usage
+example of the library is given in the file example.c which also tests that
+the library is working correctly. Another example is given in the file
+minigzip.c. The compression library itself is composed of all source files
+except example.c and minigzip.c.
+
+To compile all files and run the test program, follow the instructions
+given at the top of Makefile. In short "make test; make install"
+should work for most machines. For Unix: "./configure; make test; make install"
+For MSDOS, use one of the special makefiles such as Makefile.msc.
+For VMS, use Make_vms.com or descrip.mms.
+
+Questions about zlib should be sent to <zlib@gzip.org>, or to
+Gilles Vollant <info@winimage.com> for the Windows DLL version.
+The zlib home page is http://www.zlib.org or http://www.gzip.org/zlib/
+Before reporting a problem, please check this site to verify that
+you have the latest version of zlib; otherwise get the latest version and
+check whether the problem still exists or not.
+
+PLEASE read the zlib FAQ http://www.gzip.org/zlib/zlib_faq.html
+before asking for help.
+
+Mark Nelson <markn@ieee.org> wrote an article about zlib for the Jan. 1997
+issue of  Dr. Dobb's Journal; a copy of the article is available in
+http://dogma.net/markn/articles/zlibtool/zlibtool.htm
+
+The changes made in version 1.1.4 are documented in the file ChangeLog.
+The only changes made since 1.1.3 are bug corrections:
+
+- ZFREE was repeated on same allocation on some error conditions.
+  This creates a security problem described in
+  http://www.zlib.org/advisory-2002-03-11.txt
+- Returned incorrect error (Z_MEM_ERROR) on some invalid data
+- Avoid accesses before window for invalid distances with inflate window
+  less than 32K.
+- force windowBits > 8 to avoid a bug in the encoder for a window size
+  of 256 bytes. (A complete fix will be available in 1.1.5).
+
+The beta version 1.1.5beta includes many more changes. A new official
+version 1.1.5 will be released as soon as extensive testing has been
+completed on it.
+
+
+Unsupported third party contributions are provided in directory "contrib".
+
+A Java implementation of zlib is available in the Java Development Kit
+http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
+See the zlib home page http://www.zlib.org for details.
+
+A Perl interface to zlib written by Paul Marquess <pmarquess@bfsec.bt.co.uk>
+is in the CPAN (Comprehensive Perl Archive Network) sites
+http://www.cpan.org/modules/by-module/Compress/
+
+A Python interface to zlib written by A.M. Kuchling <amk@magnet.com>
+is available in Python 1.5 and later versions, see
+http://www.python.org/doc/lib/module-zlib.html
+
+A zlib binding for TCL written by Andreas Kupries <a.kupries@westend.com>
+is availlable at http://www.westend.com/~kupries/doc/trf/man/man.html
+
+An experimental package to read and write files in .zip format,
+written on top of zlib by Gilles Vollant <info@winimage.com>, is
+available at http://www.winimage.com/zLibDll/unzip.html
+and also in the contrib/minizip directory of zlib.
+
+
+Notes for some targets:
+
+- To build a Windows DLL version, include in a DLL project zlib.def, zlib.rc
+  and all .c files except example.c and minigzip.c; compile with -DZLIB_DLL
+  The zlib DLL support was initially done by Alessandro Iacopetti and is
+  now maintained by Gilles Vollant <info@winimage.com>. Check the zlib DLL
+  home page at http://www.winimage.com/zLibDll
+
+  From Visual Basic, you can call the DLL functions which do not take
+  a structure as argument: compress, uncompress and all gz* functions.
+  See contrib/visual-basic.txt for more information, or get
+  http://www.tcfb.com/dowseware/cmp-z-it.zip
+
+- For 64-bit Irix, deflate.c must be compiled without any optimization.
+  With -O, one libpng test fails. The test works in 32 bit mode (with
+  the -n32 compiler flag). The compiler bug has been reported to SGI.
+
+- zlib doesn't work with gcc 2.6.3 on a DEC 3000/300LX under OSF/1 2.1   
+  it works when compiled with cc.
+
+- on Digital Unix 4.0D (formely OSF/1) on AlphaServer, the cc option -std1
+  is necessary to get gzprintf working correctly. This is done by configure.
+
+- zlib doesn't work on HP-UX 9.05 with some versions of /bin/cc. It works
+  with other compilers. Use "make test" to check your compiler.
+
+- gzdopen is not supported on RISCOS, BEOS and by some Mac compilers.
+
+- For Turbo C the small model is supported only with reduced performance to
+  avoid any far allocation; it was tested with -DMAX_WBITS=11 -DMAX_MEM_LEVEL=3
+
+- For PalmOs, see http://www.cs.uit.no/~perm/PASTA/pilot/software.html
+  Per Harald Myrvang <perm@stud.cs.uit.no>
+
+
+Acknowledgments:
+
+  The deflate format used by zlib was defined by Phil Katz. The deflate
+  and zlib specifications were written by L. Peter Deutsch. Thanks to all the
+  people who reported problems and suggested various improvements in zlib;
+  they are too numerous to cite here.
+
+Copyright notice:
+
+ (C) 1995-2002 Jean-loup Gailly and Mark Adler
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Jean-loup Gailly        Mark Adler
+  jloup@gzip.org          madler@alumni.caltech.edu
+
+If you use the zlib library in a product, we would appreciate *not*
+receiving lengthy legal documents to sign. The sources are provided
+for free but without warranty of any kind.  The library has been
+entirely written by Jean-loup Gailly and Mark Adler; it does not
+include third-party code.
+
+If you redistribute modified sources, we would appreciate that you include
+in the file ChangeLog history information documenting your changes.
diff --git a/common/zlib/adler32.c b/common/zlib/adler32.c
new file mode 100644
index 00000000..828a3ff5
--- /dev/null
+++ b/common/zlib/adler32.c
@@ -0,0 +1,48 @@
+/* adler32.c -- compute the Adler-32 checksum of a data stream
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* @(#) $Id: adler32.c,v 1.1 2004/10/08 09:44:21 const_k Exp $ */
+
+#include "zlib.h"
+
+#define BASE 65521L /* largest prime smaller than 65536 */
+#define NMAX 5552
+/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
+
+#define DO1(buf,i)  {s1 += buf[i]; s2 += s1;}
+#define DO2(buf,i)  DO1(buf,i); DO1(buf,i+1);
+#define DO4(buf,i)  DO2(buf,i); DO2(buf,i+2);
+#define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);
+#define DO16(buf)   DO8(buf,0); DO8(buf,8);
+
+/* ========================================================================= */
+uLong ZEXPORT adler32(adler, buf, len)
+    uLong adler;
+    const Bytef *buf;
+    uInt len;
+{
+    unsigned long s1 = adler & 0xffff;
+    unsigned long s2 = (adler >> 16) & 0xffff;
+    int k;
+
+    if (buf == Z_NULL) return 1L;
+
+    while (len > 0) {
+        k = len < NMAX ? len : NMAX;
+        len -= k;
+        while (k >= 16) {
+            DO16(buf);
+	    buf += 16;
+            k -= 16;
+        }
+        if (k != 0) do {
+            s1 += *buf++;
+	    s2 += s1;
+        } while (--k);
+        s1 %= BASE;
+        s2 %= BASE;
+    }
+    return (s2 << 16) | s1;
+}
diff --git a/common/zlib/algorithm.txt b/common/zlib/algorithm.txt
new file mode 100644
index 00000000..cdc830b5
--- /dev/null
+++ b/common/zlib/algorithm.txt
@@ -0,0 +1,213 @@
+1. Compression algorithm (deflate)
+
+The deflation algorithm used by gzip (also zip and zlib) is a variation of
+LZ77 (Lempel-Ziv 1977, see reference below). It finds duplicated strings in
+the input data.  The second occurrence of a string is replaced by a
+pointer to the previous string, in the form of a pair (distance,
+length).  Distances are limited to 32K bytes, and lengths are limited
+to 258 bytes. When a string does not occur anywhere in the previous
+32K bytes, it is emitted as a sequence of literal bytes.  (In this
+description, `string' must be taken as an arbitrary sequence of bytes,
+and is not restricted to printable characters.)
+
+Literals or match lengths are compressed with one Huffman tree, and
+match distances are compressed with another tree. The trees are stored
+in a compact form at the start of each block. The blocks can have any
+size (except that the compressed data for one block must fit in
+available memory). A block is terminated when deflate() determines that
+it would be useful to start another block with fresh trees. (This is
+somewhat similar to the behavior of LZW-based _compress_.)
+
+Duplicated strings are found using a hash table. All input strings of
+length 3 are inserted in the hash table. A hash index is computed for
+the next 3 bytes. If the hash chain for this index is not empty, all
+strings in the chain are compared with the current input string, and
+the longest match is selected.
+
+The hash chains are searched starting with the most recent strings, to
+favor small distances and thus take advantage of the Huffman encoding.
+The hash chains are singly linked. There are no deletions from the
+hash chains, the algorithm simply discards matches that are too old.
+
+To avoid a worst-case situation, very long hash chains are arbitrarily
+truncated at a certain length, determined by a runtime option (level
+parameter of deflateInit). So deflate() does not always find the longest
+possible match but generally finds a match which is long enough.
+
+deflate() also defers the selection of matches with a lazy evaluation
+mechanism. After a match of length N has been found, deflate() searches for
+a longer match at the next input byte. If a longer match is found, the
+previous match is truncated to a length of one (thus producing a single
+literal byte) and the process of lazy evaluation begins again. Otherwise,
+the original match is kept, and the next match search is attempted only N
+steps later.
+
+The lazy match evaluation is also subject to a runtime parameter. If
+the current match is long enough, deflate() reduces the search for a longer
+match, thus speeding up the whole process. If compression ratio is more
+important than speed, deflate() attempts a complete second search even if
+the first match is already long enough.
+
+The lazy match evaluation is not performed for the fastest compression
+modes (level parameter 1 to 3). For these fast modes, new strings
+are inserted in the hash table only when no match was found, or
+when the match is not too long. This degrades the compression ratio
+but saves time since there are both fewer insertions and fewer searches.
+
+
+2. Decompression algorithm (inflate)
+
+2.1 Introduction
+
+The real question is, given a Huffman tree, how to decode fast.  The most
+important realization is that shorter codes are much more common than
+longer codes, so pay attention to decoding the short codes fast, and let
+the long codes take longer to decode.
+
+inflate() sets up a first level table that covers some number of bits of
+input less than the length of longest code.  It gets that many bits from the
+stream, and looks it up in the table.  The table will tell if the next
+code is that many bits or less and how many, and if it is, it will tell
+the value, else it will point to the next level table for which inflate()
+grabs more bits and tries to decode a longer code.
+
+How many bits to make the first lookup is a tradeoff between the time it
+takes to decode and the time it takes to build the table.  If building the
+table took no time (and if you had infinite memory), then there would only
+be a first level table to cover all the way to the longest code.  However,
+building the table ends up taking a lot longer for more bits since short
+codes are replicated many times in such a table.  What inflate() does is
+simply to make the number of bits in the first table a variable, and set it
+for the maximum speed.
+
+inflate() sends new trees relatively often, so it is possibly set for a
+smaller first level table than an application that has only one tree for
+all the data.  For inflate, which has 286 possible codes for the
+literal/length tree, the size of the first table is nine bits.  Also the
+distance trees have 30 possible values, and the size of the first table is
+six bits.  Note that for each of those cases, the table ended up one bit
+longer than the ``average'' code length, i.e. the code length of an
+approximately flat code which would be a little more than eight bits for
+286 symbols and a little less than five bits for 30 symbols.  It would be
+interesting to see if optimizing the first level table for other
+applications gave values within a bit or two of the flat code size.
+
+
+2.2 More details on the inflate table lookup
+
+Ok, you want to know what this cleverly obfuscated inflate tree actually  
+looks like.  You are correct that it's not a Huffman tree.  It is simply a  
+lookup table for the first, let's say, nine bits of a Huffman symbol.  The  
+symbol could be as short as one bit or as long as 15 bits.  If a particular  
+symbol is shorter than nine bits, then that symbol's translation is duplicated
+in all those entries that start with that symbol's bits.  For example, if the  
+symbol is four bits, then it's duplicated 32 times in a nine-bit table.  If a  
+symbol is nine bits long, it appears in the table once.
+
+If the symbol is longer than nine bits, then that entry in the table points  
+to another similar table for the remaining bits.  Again, there are duplicated  
+entries as needed.  The idea is that most of the time the symbol will be short
+and there will only be one table look up.  (That's whole idea behind data  
+compression in the first place.)  For the less frequent long symbols, there  
+will be two lookups.  If you had a compression method with really long  
+symbols, you could have as many levels of lookups as is efficient.  For  
+inflate, two is enough.
+
+So a table entry either points to another table (in which case nine bits in  
+the above example are gobbled), or it contains the translation for the symbol  
+and the number of bits to gobble.  Then you start again with the next  
+ungobbled bit.
+
+You may wonder: why not just have one lookup table for how ever many bits the  
+longest symbol is?  The reason is that if you do that, you end up spending  
+more time filling in duplicate symbol entries than you do actually decoding.   
+At least for deflate's output that generates new trees every several 10's of  
+kbytes.  You can imagine that filling in a 2^15 entry table for a 15-bit code  
+would take too long if you're only decoding several thousand symbols.  At the  
+other extreme, you could make a new table for every bit in the code.  In fact,
+that's essentially a Huffman tree.  But then you spend two much time  
+traversing the tree while decoding, even for short symbols.
+
+So the number of bits for the first lookup table is a trade of the time to  
+fill out the table vs. the time spent looking at the second level and above of
+the table.
+
+Here is an example, scaled down:
+
+The code being decoded, with 10 symbols, from 1 to 6 bits long:
+
+A: 0
+B: 10
+C: 1100
+D: 11010
+E: 11011
+F: 11100
+G: 11101
+H: 11110
+I: 111110
+J: 111111
+
+Let's make the first table three bits long (eight entries):
+
+000: A,1
+001: A,1
+010: A,1
+011: A,1
+100: B,2
+101: B,2
+110: -> table X (gobble 3 bits)
+111: -> table Y (gobble 3 bits)
+
+Each entry is what the bits decode to and how many bits that is, i.e. how  
+many bits to gobble.  Or the entry points to another table, with the number of
+bits to gobble implicit in the size of the table.
+
+Table X is two bits long since the longest code starting with 110 is five bits
+long:
+
+00: C,1
+01: C,1
+10: D,2
+11: E,2
+
+Table Y is three bits long since the longest code starting with 111 is six  
+bits long:
+
+000: F,2
+001: F,2
+010: G,2
+011: G,2
+100: H,2
+101: H,2
+110: I,3
+111: J,3
+
+So what we have here are three tables with a total of 20 entries that had to  
+be constructed.  That's compared to 64 entries for a single table.  Or  
+compared to 16 entries for a Huffman tree (six two entry tables and one four  
+entry table).  Assuming that the code ideally represents the probability of  
+the symbols, it takes on the average 1.25 lookups per symbol.  That's compared
+to one lookup for the single table, or 1.66 lookups per symbol for the  
+Huffman tree.
+
+There, I think that gives you a picture of what's going on.  For inflate, the  
+meaning of a particular symbol is often more than just a letter.  It can be a  
+byte (a "literal"), or it can be either a length or a distance which  
+indicates a base value and a number of bits to fetch after the code that is  
+added to the base value.  Or it might be the special end-of-block code.  The  
+data structures created in inftrees.c try to encode all that information  
+compactly in the tables.
+
+
+Jean-loup Gailly        Mark Adler
+jloup@gzip.org          madler@alumni.caltech.edu
+
+
+References:
+
+[LZ77] Ziv J., Lempel A., ``A Universal Algorithm for Sequential Data
+Compression,'' IEEE Transactions on Information Theory, Vol. 23, No. 3,
+pp. 337-343.
+
+``DEFLATE Compressed Data Format Specification'' available in
+ftp://ds.internic.net/rfc/rfc1951.txt
diff --git a/common/zlib/compress.c b/common/zlib/compress.c
new file mode 100644
index 00000000..5a977490
--- /dev/null
+++ b/common/zlib/compress.c
@@ -0,0 +1,68 @@
+/* compress.c -- compress a memory buffer
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* @(#) $Id: compress.c,v 1.1 2004/10/08 09:44:22 const_k Exp $ */
+
+#include "zlib.h"
+
+/* ===========================================================================
+     Compresses the source buffer into the destination buffer. The level
+   parameter has the same meaning as in deflateInit.  sourceLen is the byte
+   length of the source buffer. Upon entry, destLen is the total size of the
+   destination buffer, which must be at least 0.1% larger than sourceLen plus
+   12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+
+     compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+   Z_STREAM_ERROR if the level parameter is invalid.
+*/
+int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
+    Bytef *dest;
+    uLongf *destLen;
+    const Bytef *source;
+    uLong sourceLen;
+    int level;
+{
+    z_stream stream;
+    int err;
+
+    stream.next_in = (Bytef*)source;
+    stream.avail_in = (uInt)sourceLen;
+#ifdef MAXSEG_64K
+    /* Check for source > 64K on 16-bit machine: */
+    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
+#endif
+    stream.next_out = dest;
+    stream.avail_out = (uInt)*destLen;
+    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+
+    stream.zalloc = (alloc_func)0;
+    stream.zfree = (free_func)0;
+    stream.opaque = (voidpf)0;
+
+    err = deflateInit(&stream, level);
+    if (err != Z_OK) return err;
+
+    err = deflate(&stream, Z_FINISH);
+    if (err != Z_STREAM_END) {
+        deflateEnd(&stream);
+        return err == Z_OK ? Z_BUF_ERROR : err;
+    }
+    *destLen = stream.total_out;
+
+    err = deflateEnd(&stream);
+    return err;
+}
+
+/* ===========================================================================
+ */
+int ZEXPORT compress (dest, destLen, source, sourceLen)
+    Bytef *dest;
+    uLongf *destLen;
+    const Bytef *source;
+    uLong sourceLen;
+{
+    return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
+}
diff --git a/common/zlib/configure b/common/zlib/configure
new file mode 100755
index 00000000..e8942359
--- /dev/null
+++ b/common/zlib/configure
@@ -0,0 +1,212 @@
+#!/bin/sh
+# configure script for zlib. This script is needed only if
+# you wish to build a shared library and your system supports them,
+# of if you need special compiler, flags or install directory.
+# Otherwise, you can just use directly "make test; make install"
+#
+# To create a shared library, use "configure --shared"; by default a static
+# library is created. If the primitive shared library support provided here
+# does not work, use ftp://prep.ai.mit.edu/pub/gnu/libtool-*.tar.gz
+#
+# To impose specific compiler or flags or install directory, use for example:
+#    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
+# or for csh/tcsh users:
+#    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)
+# LDSHARED is the command to be used to create a shared library
+
+# Incorrect settings of CC or CFLAGS may prevent creating a shared library.
+# If you have problems, try without defining CC and CFLAGS before reporting
+# an error.
+
+LIBS=libz.a
+SHAREDLIB=libz.so
+VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
+AR=${AR-"ar rc"}
+RANLIB=${RANLIB-"ranlib"}
+prefix=${prefix-/usr/local}
+exec_prefix=${exec_prefix-'${prefix}'}
+libdir=${libdir-'${exec_prefix}/lib'}
+includedir=${includedir-'${prefix}/include'}
+shared_ext='.so'
+shared=0
+gcc=0
+old_cc="$CC"
+old_cflags="$CFLAGS"
+
+while test $# -ge 1
+do
+case "$1" in
+    -h* | --h*)
+      echo 'usage:'
+      echo '  configure [--shared] [--prefix=PREFIX]  [--exec_prefix=EXPREFIX]'
+      echo '     [--libdir=LIBDIR] [--includedir=INCLUDEDIR]'
+        exit 0;;
+    -p*=* | --p*=*) prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+    -e*=* | --e*=*) exec_prefix=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+    -l*=* | --libdir=*) libdir=`echo $1 | sed 's/[-a-z_]*=//'`; shift;;
+    -i*=* | --includedir=*) includedir=`echo $1 | sed 's/[-a-z_]*=//'`;shift;;
+    -p* | --p*) prefix="$2"; shift; shift;;
+    -e* | --e*) exec_prefix="$2"; shift; shift;;
+    -l* | --l*) libdir="$2"; shift; shift;;
+    -i* | --i*) includedir="$2"; shift; shift;;
+    -s* | --s*) shared=1; shift;;
+    esac
+done
+
+test=ztest$$
+cat > $test.c <<EOF
+extern int getchar();
+int hello() {return getchar();}
+EOF
+
+test -z "$CC" && echo Checking for gcc...
+cc=${CC-gcc}
+cflags=${CFLAGS-"-O3"}
+# to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
+case "$cc" in
+  *gcc*) gcc=1;;
+esac
+
+if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
+  CC="$cc"
+  SFLAGS=${CFLAGS-"-fPIC -O3"}
+  CFLAGS="$cflags"
+  case `(uname -s || echo unknown) 2>/dev/null` in
+  Linux | linux) LDSHARED=${LDSHARED-"gcc -shared -Wl,-soname,libz.so.1"};;
+  *)             LDSHARED=${LDSHARED-"gcc -shared"};;
+  esac
+else
+  # find system name and corresponding cc options
+  CC=${CC-cc}
+  case `(uname -sr || echo unknown) 2>/dev/null` in
+  HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
+	     CFLAGS=${CFLAGS-"-O"}
+#	     LDSHARED=${LDSHARED-"ld -b +vnocompatwarnings"}
+	     LDSHARED=${LDSHARED-"ld -b"}
+	     shared_ext='.sl'
+	     SHAREDLIB='libz.sl';;
+  IRIX*)     SFLAGS=${CFLAGS-"-ansi -O2 -rpath ."}
+	     CFLAGS=${CFLAGS-"-ansi -O2"}
+	     LDSHARED=${LDSHARED-"cc -shared"};;
+  OSF1\ V4*) SFLAGS=${CFLAGS-"-O -std1"}
+	     CFLAGS=${CFLAGS-"-O -std1"}
+	     LDSHARED=${LDSHARED-"cc -shared  -Wl,-soname,$SHAREDLIB -Wl,-msym -Wl,-rpath,$(libdir) -Wl,-set_version,${VER}:1.0"};;
+  OSF1*)     SFLAGS=${CFLAGS-"-O -std1"}
+	     CFLAGS=${CFLAGS-"-O -std1"}
+	     LDSHARED=${LDSHARED-"cc -shared"};;
+  QNX*)      SFLAGS=${CFLAGS-"-4 -O"}
+             CFLAGS=${CFLAGS-"-4 -O"}
+	     LDSHARED=${LDSHARED-"cc"}
+             RANLIB=${RANLIB-"true"}
+             AR="cc -A";;
+  SCO_SV\ 3.2*) SFLAGS=${CFLAGS-"-O3 -dy -KPIC "}
+	     CFLAGS=${CFLAGS-"-O3"}
+	     LDSHARED=${LDSHARED-"cc -dy -KPIC -G"};;
+  SunOS\ 5*) SFLAGS=${CFLAGS-"-fast -xcg89 -KPIC -R."}
+             CFLAGS=${CFLAGS-"-fast -xcg89"}
+	     LDSHARED=${LDSHARED-"cc -G"};;
+  SunOS\ 4*) SFLAGS=${CFLAGS-"-O2 -PIC"}
+	     CFLAGS=${CFLAGS-"-O2"}
+	     LDSHARED=${LDSHARED-"ld"};;
+  UNIX_System_V\ 4.2.0) 
+	     SFLAGS=${CFLAGS-"-KPIC -O"}
+	     CFLAGS=${CFLAGS-"-O"}
+	     LDSHARED=${LDSHARED-"cc -G"};;
+  UNIX_SV\ 4.2MP)
+	     SFLAGS=${CFLAGS-"-Kconform_pic -O"}
+	     CFLAGS=${CFLAGS-"-O"}
+	     LDSHARED=${LDSHARED-"cc -G"};;
+  # send working options for other systems to support@gzip.org
+  *)         SFLAGS=${CFLAGS-"-O"}
+	     CFLAGS=${CFLAGS-"-O"}
+	     LDSHARED=${LDSHARED-"cc -shared"};;
+  esac
+fi
+
+if test $shared -eq 1; then
+  echo Checking for shared library support...
+  # we must test in two steps (cc then ld), required at least on SunOS 4.x
+  if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&
+     test "`($LDSHARED -o $test$shared_ext $test.o) 2>&1`" = ""; then
+    CFLAGS="$SFLAGS"
+    LIBS="$SHAREDLIB.$VER"
+    echo Building shared library $SHAREDLIB.$VER with $CC.
+  elif test -z "$old_cc" -a -z "$old_cflags"; then
+    echo No shared library suppport.
+    shared=0;
+  else
+    echo 'No shared library suppport; try without defining CC and CFLAGS'
+    shared=0;
+  fi
+fi
+if test $shared -eq 0; then
+  LDSHARED="$CC"
+  echo Building static library $LIBS version $VER with $CC.
+fi
+
+cat > $test.c <<EOF
+#include <unistd.h>
+int main() { return 0; }
+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  CFLAGS="$CFLAGS -DHAVE_UNISTD_H"
+  echo "Checking for unistd.h... Yes."
+else
+  echo "Checking for unistd.h... No."
+fi
+
+cat > $test.c <<EOF
+#include <errno.h>
+int main() { return 0; }
+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  echo "Checking for errno.h...	 Yes."
+else
+  echo "Checking for errno.h...	 No."
+  CFLAGS="$CFLAGS -DNO_ERRNO_H"
+fi
+
+cat > $test.c <<EOF
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+caddr_t hello() {
+  return mmap((caddr_t)0, (off_t)0, PROT_READ, MAP_SHARED, 0, (off_t)0); 
+}
+EOF
+if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
+  CFLAGS="$CFLAGS -DUSE_MMAP"
+  echo Checking for mmap support... Yes.
+else
+  echo Checking for mmap support... No.
+fi
+
+CPP=${CPP-"$CC -E"}
+case $CFLAGS in
+  *ASMV*)
+    if test "`nm $test.o | grep _hello`" = ""; then
+      CPP="$CPP -DNO_UNDERLINE"
+      echo Checking for underline in external names... No.
+    else
+      echo Checking for underline in external names... Yes.
+    fi;;
+esac
+
+rm -f $test.[co] $test$shared_ext
+
+# udpate Makefile
+sed < Makefile.in "
+/^CC *=/s%=.*%=$CC%
+/^CFLAGS *=/s%=.*%=$CFLAGS%
+/^CPP *=/s%=.*%=$CPP%
+/^LDSHARED *=/s%=.*%=$LDSHARED%
+/^LIBS *=/s%=.*%=$LIBS%
+/^SHAREDLIB *=/s%=.*%=$SHAREDLIB%
+/^AR *=/s%=.*%=$AR%
+/^RANLIB *=/s%=.*%=$RANLIB%
+/^VER *=/s%=.*%=$VER%
+/^prefix *=/s%=.*%=$prefix%
+/^exec_prefix *=/s%=.*%=$exec_prefix%
+/^libdir *=/s%=.*%=$libdir%
+/^includedir *=/s%=.*%=$includedir%
+" > Makefile
diff --git a/common/zlib/crc32.c b/common/zlib/crc32.c
new file mode 100644
index 00000000..b9a8a923
--- /dev/null
+++ b/common/zlib/crc32.c
@@ -0,0 +1,162 @@
+/* crc32.c -- compute the CRC-32 of a data stream
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* @(#) $Id: crc32.c,v 1.1 2004/10/08 09:44:23 const_k Exp $ */
+
+#include "zlib.h"
+
+#define local static
+
+#ifdef DYNAMIC_CRC_TABLE
+
+local int crc_table_empty = 1;
+local uLongf crc_table[256];
+local void make_crc_table OF((void));
+
+/*
+  Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
+  x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
+
+  Polynomials over GF(2) are represented in binary, one bit per coefficient,
+  with the lowest powers in the most significant bit.  Then adding polynomials
+  is just exclusive-or, and multiplying a polynomial by x is a right shift by
+  one.  If we call the above polynomial p, and represent a byte as the
+  polynomial q, also with the lowest power in the most significant bit (so the
+  byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
+  where a mod b means the remainder after dividing a by b.
+
+  This calculation is done using the shift-register method of multiplying and
+  taking the remainder.  The register is initialized to zero, and for each
+  incoming bit, x^32 is added mod p to the register if the bit is a one (where
+  x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
+  x (which is shifting right by one and adding x^32 mod p if the bit shifted
+  out is a one).  We start with the highest power (least significant bit) of
+  q and repeat for all eight bits of q.
+
+  The table is simply the CRC of all possible eight bit values.  This is all
+  the information needed to generate CRC's on data a byte at a time for all
+  combinations of CRC register values and incoming bytes.
+*/
+local void make_crc_table()
+{
+  uLong c;
+  int n, k;
+  uLong poly;            /* polynomial exclusive-or pattern */
+  /* terms of polynomial defining this crc (except x^32): */
+  static const Byte p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
+
+  /* make exclusive-or pattern from polynomial (0xedb88320L) */
+  poly = 0L;
+  for (n = 0; n < sizeof(p)/sizeof(Byte); n++)
+    poly |= 1L << (31 - p[n]);
+ 
+  for (n = 0; n < 256; n++)
+  {
+    c = (uLong)n;
+    for (k = 0; k < 8; k++)
+      c = c & 1 ? poly ^ (c >> 1) : c >> 1;
+    crc_table[n] = c;
+  }
+  crc_table_empty = 0;
+}
+#else
+/* ========================================================================
+ * Table of CRC-32's of all single-byte values (made by make_crc_table)
+ */
+local const uLongf crc_table[256] = {
+  0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
+  0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
+  0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
+  0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
+  0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
+  0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
+  0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
+  0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
+  0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
+  0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
+  0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
+  0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
+  0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
+  0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
+  0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
+  0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
+  0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
+  0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
+  0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
+  0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
+  0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
+  0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
+  0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
+  0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
+  0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
+  0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
+  0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
+  0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
+  0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
+  0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
+  0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
+  0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
+  0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
+  0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
+  0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
+  0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
+  0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
+  0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
+  0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
+  0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
+  0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
+  0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
+  0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
+  0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
+  0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
+  0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
+  0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
+  0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
+  0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
+  0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
+  0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
+  0x2d02ef8dL
+};
+#endif
+
+/* =========================================================================
+ * This function can be used by asm versions of crc32()
+ */
+const uLongf * ZEXPORT get_crc_table()
+{
+#ifdef DYNAMIC_CRC_TABLE
+  if (crc_table_empty) make_crc_table();
+#endif
+  return (const uLongf *)crc_table;
+}
+
+/* ========================================================================= */
+#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
+#define DO2(buf)  DO1(buf); DO1(buf);
+#define DO4(buf)  DO2(buf); DO2(buf);
+#define DO8(buf)  DO4(buf); DO4(buf);
+
+/* ========================================================================= */
+uLong ZEXPORT crc32(crc, buf, len)
+    uLong crc;
+    const Bytef *buf;
+    uInt len;
+{
+    if (buf == Z_NULL) return 0L;
+#ifdef DYNAMIC_CRC_TABLE
+    if (crc_table_empty)
+      make_crc_table();
+#endif
+    crc = crc ^ 0xffffffffL;
+    while (len >= 8)
+    {
+      DO8(buf);
+      len -= 8;
+    }
+    if (len) do {
+      DO1(buf);
+    } while (--len);
+    return crc ^ 0xffffffffL;
+}
diff --git a/common/zlib/deflate.c b/common/zlib/deflate.c
new file mode 100644
index 00000000..57a590c2
--- /dev/null
+++ b/common/zlib/deflate.c
@@ -0,0 +1,1350 @@
+/* deflate.c -- compress data using the deflation algorithm
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/*
+ *  ALGORITHM
+ *
+ *      The "deflation" process depends on being able to identify portions
+ *      of the input text which are identical to earlier input (within a
+ *      sliding window trailing behind the input currently being processed).
+ *
+ *      The most straightforward technique turns out to be the fastest for
+ *      most input files: try all possible matches and select the longest.
+ *      The key feature of this algorithm is that insertions into the string
+ *      dictionary are very simple and thus fast, and deletions are avoided
+ *      completely. Insertions are performed at each input character, whereas
+ *      string matches are performed only when the previous match ends. So it
+ *      is preferable to spend more time in matches to allow very fast string
+ *      insertions and avoid deletions. The matching algorithm for small
+ *      strings is inspired from that of Rabin & Karp. A brute force approach
+ *      is used to find longer strings when a small match has been found.
+ *      A similar algorithm is used in comic (by Jan-Mark Wams) and freeze
+ *      (by Leonid Broukhis).
+ *         A previous version of this file used a more sophisticated algorithm
+ *      (by Fiala and Greene) which is guaranteed to run in linear amortized
+ *      time, but has a larger average cost, uses more memory and is patented.
+ *      However the F&G algorithm may be faster for some highly redundant
+ *      files if the parameter max_chain_length (described below) is too large.
+ *
+ *  ACKNOWLEDGEMENTS
+ *
+ *      The idea of lazy evaluation of matches is due to Jan-Mark Wams, and
+ *      I found it in 'freeze' written by Leonid Broukhis.
+ *      Thanks to many people for bug reports and testing.
+ *
+ *  REFERENCES
+ *
+ *      Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
+ *      Available in ftp://ds.internic.net/rfc/rfc1951.txt
+ *
+ *      A description of the Rabin and Karp algorithm is given in the book
+ *         "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
+ *
+ *      Fiala,E.R., and Greene,D.H.
+ *         Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595
+ *
+ */
+
+/* @(#) $Id: deflate.c,v 1.1 2004/10/08 09:44:24 const_k Exp $ */
+
+#include "deflate.h"
+
+const char deflate_copyright[] =
+   " deflate 1.1.4 Copyright 1995-2002 Jean-loup Gailly ";
+/*
+  If you use the zlib library in a product, an acknowledgment is welcome
+  in the documentation of your product. If for some reason you cannot
+  include such an acknowledgment, I would appreciate that you keep this
+  copyright string in the executable of your product.
+ */
+
+/* ===========================================================================
+ *  Function prototypes.
+ */
+typedef enum {
+    need_more,      /* block not completed, need more input or more output */
+    block_done,     /* block flush performed */
+    finish_started, /* finish started, need only more output at next deflate */
+    finish_done     /* finish done, accept no more input or output */
+} block_state;
+
+typedef block_state (*compress_func) OF((deflate_state *s, int flush));
+/* Compression function. Returns the block state after the call. */
+
+local void fill_window    OF((deflate_state *s));
+local block_state deflate_stored OF((deflate_state *s, int flush));
+local block_state deflate_fast   OF((deflate_state *s, int flush));
+local block_state deflate_slow   OF((deflate_state *s, int flush));
+local void lm_init        OF((deflate_state *s));
+local void putShortMSB    OF((deflate_state *s, uInt b));
+local void flush_pending  OF((z_streamp strm));
+local int read_buf        OF((z_streamp strm, Bytef *buf, unsigned size));
+#ifdef ASMV
+      void match_init OF((void)); /* asm code initialization */
+      uInt longest_match  OF((deflate_state *s, IPos cur_match));
+#else
+local uInt longest_match  OF((deflate_state *s, IPos cur_match));
+#endif
+
+#ifdef DEBUG
+local  void check_match OF((deflate_state *s, IPos start, IPos match,
+                            int length));
+#endif
+
+/* ===========================================================================
+ * Local data
+ */
+
+#define NIL 0
+/* Tail of hash chains */
+
+#ifndef TOO_FAR
+#  define TOO_FAR 4096
+#endif
+/* Matches of length 3 are discarded if their distance exceeds TOO_FAR */
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+/* Values for max_lazy_match, good_match and max_chain_length, depending on
+ * the desired pack level (0..9). The values given below have been tuned to
+ * exclude worst case performance for pathological files. Better values may be
+ * found for specific files.
+ */
+typedef struct config_s {
+   ush good_length; /* reduce lazy search above this match length */
+   ush max_lazy;    /* do not perform lazy search above this match length */
+   ush nice_length; /* quit search above this match length */
+   ush max_chain;
+   compress_func func;
+} config;
+
+local const config configuration_table[10] = {
+/*      good lazy nice chain */
+/* 0 */ {0,    0,  0,    0, deflate_stored},  /* store only */
+/* 1 */ {4,    4,  8,    4, deflate_fast}, /* maximum speed, no lazy matches */
+/* 2 */ {4,    5, 16,    8, deflate_fast},
+/* 3 */ {4,    6, 32,   32, deflate_fast},
+
+/* 4 */ {4,    4, 16,   16, deflate_slow},  /* lazy matches */
+/* 5 */ {8,   16, 32,   32, deflate_slow},
+/* 6 */ {8,   16, 128, 128, deflate_slow},
+/* 7 */ {8,   32, 128, 256, deflate_slow},
+/* 8 */ {32, 128, 258, 1024, deflate_slow},
+/* 9 */ {32, 258, 258, 4096, deflate_slow}}; /* maximum compression */
+
+/* Note: the deflate() code requires max_lazy >= MIN_MATCH and max_chain >= 4
+ * For deflate_fast() (levels <= 3) good is ignored and lazy has a different
+ * meaning.
+ */
+
+#define EQUAL 0
+/* result of memcmp for equal strings */
+
+struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
+
+/* ===========================================================================
+ * Update a hash value with the given input byte
+ * IN  assertion: all calls to to UPDATE_HASH are made with consecutive
+ *    input characters, so that a running hash key can be computed from the
+ *    previous key instead of complete recalculation each time.
+ */
+#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
+
+
+/* ===========================================================================
+ * Insert string str in the dictionary and set match_head to the previous head
+ * of the hash chain (the most recent string with same hash key). Return
+ * the previous length of the hash chain.
+ * If this file is compiled with -DFASTEST, the compression level is forced
+ * to 1, and no hash chains are maintained.
+ * IN  assertion: all calls to to INSERT_STRING are made with consecutive
+ *    input characters and the first MIN_MATCH bytes of str are valid
+ *    (except for the last MIN_MATCH-1 bytes of the input file).
+ */
+#ifdef FASTEST
+#define INSERT_STRING(s, str, match_head) \
+   (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+    match_head = s->head[s->ins_h], \
+    s->head[s->ins_h] = (Pos)(str))
+#else
+#define INSERT_STRING(s, str, match_head) \
+   (UPDATE_HASH(s, s->ins_h, s->window[(str) + (MIN_MATCH-1)]), \
+    s->prev[(str) & s->w_mask] = match_head = s->head[s->ins_h], \
+    s->head[s->ins_h] = (Pos)(str))
+#endif
+
+/* ===========================================================================
+ * Initialize the hash table (avoiding 64K overflow for 16 bit systems).
+ * prev[] will be initialized on the fly.
+ */
+#define CLEAR_HASH(s) \
+    s->head[s->hash_size-1] = NIL; \
+    zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+
+/* ========================================================================= */
+int ZEXPORT deflateInit_(strm, level, version, stream_size)
+    z_streamp strm;
+    int level;
+    const char *version;
+    int stream_size;
+{
+    return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
+			 Z_DEFAULT_STRATEGY, version, stream_size);
+    /* To do: ignore strm->next_in if we use it as window */
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
+		  version, stream_size)
+    z_streamp strm;
+    int  level;
+    int  method;
+    int  windowBits;
+    int  memLevel;
+    int  strategy;
+    const char *version;
+    int stream_size;
+{
+    deflate_state *s;
+    int noheader = 0;
+    static const char* my_version = ZLIB_VERSION;
+
+    ushf *overlay;
+    /* We overlay pending_buf and d_buf+l_buf. This works since the average
+     * output size for (length,distance) codes is <= 24 bits.
+     */
+
+    if (version == Z_NULL || version[0] != my_version[0] ||
+        stream_size != sizeof(z_stream)) {
+	return Z_VERSION_ERROR;
+    }
+    if (strm == Z_NULL) return Z_STREAM_ERROR;
+
+    strm->msg = Z_NULL;
+    if (strm->zalloc == Z_NULL) {
+	strm->zalloc = zcalloc;
+	strm->opaque = (voidpf)0;
+    }
+    if (strm->zfree == Z_NULL) strm->zfree = zcfree;
+
+    if (level == Z_DEFAULT_COMPRESSION) level = 6;
+#ifdef FASTEST
+    level = 1;
+#endif
+
+    if (windowBits < 0) { /* undocumented feature: suppress zlib header */
+        noheader = 1;
+        windowBits = -windowBits;
+    }
+    if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
+        windowBits < 9 || windowBits > 15 || level < 0 || level > 9 ||
+	strategy < 0 || strategy > Z_HUFFMAN_ONLY) {
+        return Z_STREAM_ERROR;
+    }
+    s = (deflate_state *) ZALLOC(strm, 1, sizeof(deflate_state));
+    if (s == Z_NULL) return Z_MEM_ERROR;
+    strm->state = (struct internal_state FAR *)s;
+    s->strm = strm;
+
+    s->noheader = noheader;
+    s->w_bits = windowBits;
+    s->w_size = 1 << s->w_bits;
+    s->w_mask = s->w_size - 1;
+
+    s->hash_bits = memLevel + 7;
+    s->hash_size = 1 << s->hash_bits;
+    s->hash_mask = s->hash_size - 1;
+    s->hash_shift =  ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
+
+    s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte));
+    s->prev   = (Posf *)  ZALLOC(strm, s->w_size, sizeof(Pos));
+    s->head   = (Posf *)  ZALLOC(strm, s->hash_size, sizeof(Pos));
+
+    s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
+
+    overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
+    s->pending_buf = (uchf *) overlay;
+    s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
+
+    if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
+        s->pending_buf == Z_NULL) {
+        strm->msg = (char*)ERR_MSG(Z_MEM_ERROR);
+        deflateEnd (strm);
+        return Z_MEM_ERROR;
+    }
+    s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
+    s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
+
+    s->level = level;
+    s->strategy = strategy;
+    s->method = (Byte)method;
+
+    return deflateReset(strm);
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
+    z_streamp strm;
+    const Bytef *dictionary;
+    uInt  dictLength;
+{
+    deflate_state *s;
+    uInt length = dictLength;
+    uInt n;
+    IPos hash_head = 0;
+
+    if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
+        strm->state->status != INIT_STATE) return Z_STREAM_ERROR;
+
+    s = strm->state;
+    strm->adler = adler32(strm->adler, dictionary, dictLength);
+
+    if (length < MIN_MATCH) return Z_OK;
+    if (length > MAX_DIST(s)) {
+	length = MAX_DIST(s);
+#ifndef USE_DICT_HEAD
+	dictionary += dictLength - length; /* use the tail of the dictionary */
+#endif
+    }
+    zmemcpy(s->window, dictionary, length);
+    s->strstart = length;
+    s->block_start = (long)length;
+
+    /* Insert all strings in the hash table (except for the last two bytes).
+     * s->lookahead stays null, so s->ins_h will be recomputed at the next
+     * call of fill_window.
+     */
+    s->ins_h = s->window[0];
+    UPDATE_HASH(s, s->ins_h, s->window[1]);
+    for (n = 0; n <= length - MIN_MATCH; n++) {
+	INSERT_STRING(s, n, hash_head);
+    }
+    if (hash_head) hash_head = 0;  /* to make compiler happy */
+    return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateReset (strm)
+    z_streamp strm;
+{
+    deflate_state *s;
+    
+    if (strm == Z_NULL || strm->state == Z_NULL ||
+        strm->zalloc == Z_NULL || strm->zfree == Z_NULL) return Z_STREAM_ERROR;
+
+    strm->total_in = strm->total_out = 0;
+    strm->msg = Z_NULL; /* use zfree if we ever allocate msg dynamically */
+    strm->data_type = Z_UNKNOWN;
+
+    s = (deflate_state *)strm->state;
+    s->pending = 0;
+    s->pending_out = s->pending_buf;
+
+    if (s->noheader < 0) {
+        s->noheader = 0; /* was set to -1 by deflate(..., Z_FINISH); */
+    }
+    s->status = s->noheader ? BUSY_STATE : INIT_STATE;
+    strm->adler = 1;
+    s->last_flush = Z_NO_FLUSH;
+
+    _tr_init(s);
+    lm_init(s);
+
+    return Z_OK;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateParams(strm, level, strategy)
+    z_streamp strm;
+    int level;
+    int strategy;
+{
+    deflate_state *s;
+    compress_func func;
+    int err = Z_OK;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+    s = strm->state;
+
+    if (level == Z_DEFAULT_COMPRESSION) {
+	level = 6;
+    }
+    if (level < 0 || level > 9 || strategy < 0 || strategy > Z_HUFFMAN_ONLY) {
+	return Z_STREAM_ERROR;
+    }
+    func = configuration_table[s->level].func;
+
+    if (func != configuration_table[level].func && strm->total_in != 0) {
+	/* Flush the last buffer: */
+	err = deflate(strm, Z_PARTIAL_FLUSH);
+    }
+    if (s->level != level) {
+	s->level = level;
+	s->max_lazy_match   = configuration_table[level].max_lazy;
+	s->good_match       = configuration_table[level].good_length;
+	s->nice_match       = configuration_table[level].nice_length;
+	s->max_chain_length = configuration_table[level].max_chain;
+    }
+    s->strategy = strategy;
+    return err;
+}
+
+/* =========================================================================
+ * Put a short in the pending buffer. The 16-bit value is put in MSB order.
+ * IN assertion: the stream state is correct and there is enough room in
+ * pending_buf.
+ */
+local void putShortMSB (s, b)
+    deflate_state *s;
+    uInt b;
+{
+    put_byte(s, (Byte)(b >> 8));
+    put_byte(s, (Byte)(b & 0xff));
+}   
+
+/* =========================================================================
+ * Flush as much pending output as possible. All deflate() output goes
+ * through this function so some applications may wish to modify it
+ * to avoid allocating a large strm->next_out buffer and copying into it.
+ * (See also read_buf()).
+ */
+local void flush_pending(strm)
+    z_streamp strm;
+{
+    unsigned len = strm->state->pending;
+
+    if (len > strm->avail_out) len = strm->avail_out;
+    if (len == 0) return;
+
+    zmemcpy(strm->next_out, strm->state->pending_out, len);
+    strm->next_out  += len;
+    strm->state->pending_out  += len;
+    strm->total_out += len;
+    strm->avail_out  -= len;
+    strm->state->pending -= len;
+    if (strm->state->pending == 0) {
+        strm->state->pending_out = strm->state->pending_buf;
+    }
+}
+
+/* ========================================================================= */
+int ZEXPORT deflate (strm, flush)
+    z_streamp strm;
+    int flush;
+{
+    int old_flush; /* value of flush param for previous deflate call */
+    deflate_state *s;
+
+    if (strm == Z_NULL || strm->state == Z_NULL ||
+	flush > Z_FINISH || flush < 0) {
+        return Z_STREAM_ERROR;
+    }
+    s = strm->state;
+
+    if (strm->next_out == Z_NULL ||
+        (strm->next_in == Z_NULL && strm->avail_in != 0) ||
+	(s->status == FINISH_STATE && flush != Z_FINISH)) {
+        ERR_RETURN(strm, Z_STREAM_ERROR);
+    }
+    if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
+
+    s->strm = strm; /* just in case */
+    old_flush = s->last_flush;
+    s->last_flush = flush;
+
+    /* Write the zlib header */
+    if (s->status == INIT_STATE) {
+
+        uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
+        uInt level_flags = (s->level-1) >> 1;
+
+        if (level_flags > 3) level_flags = 3;
+        header |= (level_flags << 6);
+	if (s->strstart != 0) header |= PRESET_DICT;
+        header += 31 - (header % 31);
+
+        s->status = BUSY_STATE;
+        putShortMSB(s, header);
+
+	/* Save the adler32 of the preset dictionary: */
+	if (s->strstart != 0) {
+	    putShortMSB(s, (uInt)(strm->adler >> 16));
+	    putShortMSB(s, (uInt)(strm->adler & 0xffff));
+	}
+	strm->adler = 1L;
+    }
+
+    /* Flush as much pending output as possible */
+    if (s->pending != 0) {
+        flush_pending(strm);
+        if (strm->avail_out == 0) {
+	    /* Since avail_out is 0, deflate will be called again with
+	     * more output space, but possibly with both pending and
+	     * avail_in equal to zero. There won't be anything to do,
+	     * but this is not an error situation so make sure we
+	     * return OK instead of BUF_ERROR at next call of deflate:
+             */
+	    s->last_flush = -1;
+	    return Z_OK;
+	}
+
+    /* Make sure there is something to do and avoid duplicate consecutive
+     * flushes. For repeated and useless calls with Z_FINISH, we keep
+     * returning Z_STREAM_END instead of Z_BUFF_ERROR.
+     */
+    } else if (strm->avail_in == 0 && flush <= old_flush &&
+	       flush != Z_FINISH) {
+        ERR_RETURN(strm, Z_BUF_ERROR);
+    }
+
+    /* User must not provide more input after the first FINISH: */
+    if (s->status == FINISH_STATE && strm->avail_in != 0) {
+        ERR_RETURN(strm, Z_BUF_ERROR);
+    }
+
+    /* Start a new block or continue the current one.
+     */
+    if (strm->avail_in != 0 || s->lookahead != 0 ||
+        (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
+        block_state bstate;
+
+	bstate = (*(configuration_table[s->level].func))(s, flush);
+
+        if (bstate == finish_started || bstate == finish_done) {
+            s->status = FINISH_STATE;
+        }
+        if (bstate == need_more || bstate == finish_started) {
+	    if (strm->avail_out == 0) {
+	        s->last_flush = -1; /* avoid BUF_ERROR next call, see above */
+	    }
+	    return Z_OK;
+	    /* If flush != Z_NO_FLUSH && avail_out == 0, the next call
+	     * of deflate should use the same flush parameter to make sure
+	     * that the flush is complete. So we don't have to output an
+	     * empty block here, this will be done at next call. This also
+	     * ensures that for a very small output buffer, we emit at most
+	     * one empty block.
+	     */
+	}
+        if (bstate == block_done) {
+            if (flush == Z_PARTIAL_FLUSH) {
+                _tr_align(s);
+            } else { /* FULL_FLUSH or SYNC_FLUSH */
+                _tr_stored_block(s, (char*)0, 0L, 0);
+                /* For a full flush, this empty block will be recognized
+                 * as a special marker by inflate_sync().
+                 */
+                if (flush == Z_FULL_FLUSH) {
+                    CLEAR_HASH(s);             /* forget history */
+                }
+            }
+            flush_pending(strm);
+	    if (strm->avail_out == 0) {
+	      s->last_flush = -1; /* avoid BUF_ERROR at next call, see above */
+	      return Z_OK;
+	    }
+        }
+    }
+    Assert(strm->avail_out > 0, "bug2");
+
+    if (flush != Z_FINISH) return Z_OK;
+    if (s->noheader) return Z_STREAM_END;
+
+    /* Write the zlib trailer (adler32) */
+    putShortMSB(s, (uInt)(strm->adler >> 16));
+    putShortMSB(s, (uInt)(strm->adler & 0xffff));
+    flush_pending(strm);
+    /* If avail_out is zero, the application will call deflate again
+     * to flush the rest.
+     */
+    s->noheader = -1; /* write the trailer only once! */
+    return s->pending != 0 ? Z_OK : Z_STREAM_END;
+}
+
+/* ========================================================================= */
+int ZEXPORT deflateEnd (strm)
+    z_streamp strm;
+{
+    int status;
+
+    if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+
+    status = strm->state->status;
+    if (status != INIT_STATE && status != BUSY_STATE &&
+	status != FINISH_STATE) {
+      return Z_STREAM_ERROR;
+    }
+
+    /* Deallocate in reverse order of allocations: */
+    TRY_FREE(strm, strm->state->pending_buf);
+    TRY_FREE(strm, strm->state->head);
+    TRY_FREE(strm, strm->state->prev);
+    TRY_FREE(strm, strm->state->window);
+
+    ZFREE(strm, strm->state);
+    strm->state = Z_NULL;
+
+    return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;
+}
+
+/* =========================================================================
+ * Copy the source state to the destination state.
+ * To simplify the source, this is not supported for 16-bit MSDOS (which
+ * doesn't have enough memory anyway to duplicate compression states).
+ */
+int ZEXPORT deflateCopy (dest, source)
+    z_streamp dest;
+    z_streamp source;
+{
+#ifdef MAXSEG_64K
+    return Z_STREAM_ERROR;
+#else
+    deflate_state *ds;
+    deflate_state *ss;
+    ushf *overlay;
+
+
+    if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
+        return Z_STREAM_ERROR;
+    }
+
+    ss = source->state;
+
+    *dest = *source;
+
+    ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
+    if (ds == Z_NULL) return Z_MEM_ERROR;
+    dest->state = (struct internal_state FAR *) ds;
+    *ds = *ss;
+    ds->strm = dest;
+
+    ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
+    ds->prev   = (Posf *)  ZALLOC(dest, ds->w_size, sizeof(Pos));
+    ds->head   = (Posf *)  ZALLOC(dest, ds->hash_size, sizeof(Pos));
+    overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
+    ds->pending_buf = (uchf *) overlay;
+
+    if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
+        ds->pending_buf == Z_NULL) {
+        deflateEnd (dest);
+        return Z_MEM_ERROR;
+    }
+    /* following zmemcpy do not work for 16-bit MSDOS */
+    zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
+    zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos));
+    zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos));
+    zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
+
+    ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
+    ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
+    ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
+
+    ds->l_desc.dyn_tree = ds->dyn_ltree;
+    ds->d_desc.dyn_tree = ds->dyn_dtree;
+    ds->bl_desc.dyn_tree = ds->bl_tree;
+
+    return Z_OK;
+#endif
+}
+
+/* ===========================================================================
+ * Read a new buffer from the current input stream, update the adler32
+ * and total number of bytes read.  All deflate() input goes through
+ * this function so some applications may wish to modify it to avoid
+ * allocating a large strm->next_in buffer and copying from it.
+ * (See also flush_pending()).
+ */
+local int read_buf(strm, buf, size)
+    z_streamp strm;
+    Bytef *buf;
+    unsigned size;
+{
+    unsigned len = strm->avail_in;
+
+    if (len > size) len = size;
+    if (len == 0) return 0;
+
+    strm->avail_in  -= len;
+
+    if (!strm->state->noheader) {
+        strm->adler = adler32(strm->adler, strm->next_in, len);
+    }
+    zmemcpy(buf, strm->next_in, len);
+    strm->next_in  += len;
+    strm->total_in += len;
+
+    return (int)len;
+}
+
+/* ===========================================================================
+ * Initialize the "longest match" routines for a new zlib stream
+ */
+local void lm_init (s)
+    deflate_state *s;
+{
+    s->window_size = (ulg)2L*s->w_size;
+
+    CLEAR_HASH(s);
+
+    /* Set the default configuration parameters:
+     */
+    s->max_lazy_match   = configuration_table[s->level].max_lazy;
+    s->good_match       = configuration_table[s->level].good_length;
+    s->nice_match       = configuration_table[s->level].nice_length;
+    s->max_chain_length = configuration_table[s->level].max_chain;
+
+    s->strstart = 0;
+    s->block_start = 0L;
+    s->lookahead = 0;
+    s->match_length = s->prev_length = MIN_MATCH-1;
+    s->match_available = 0;
+    s->ins_h = 0;
+#ifdef ASMV
+    match_init(); /* initialize the asm code */
+#endif
+}
+
+/* ===========================================================================
+ * Set match_start to the longest match starting at the given string and
+ * return its length. Matches shorter or equal to prev_length are discarded,
+ * in which case the result is equal to prev_length and match_start is
+ * garbage.
+ * IN assertions: cur_match is the head of the hash chain for the current
+ *   string (strstart) and its distance is <= MAX_DIST, and prev_length >= 1
+ * OUT assertion: the match length is not greater than s->lookahead.
+ */
+#ifndef ASMV
+/* For 80x86 and 680x0, an optimized version will be provided in match.asm or
+ * match.S. The code will be functionally equivalent.
+ */
+#ifndef FASTEST
+local uInt longest_match(s, cur_match)
+    deflate_state *s;
+    IPos cur_match;                             /* current match */
+{
+    unsigned chain_length = s->max_chain_length;/* max hash chain length */
+    register Bytef *scan = s->window + s->strstart; /* current string */
+    register Bytef *match;                       /* matched string */
+    register int len;                           /* length of current match */
+    int best_len = s->prev_length;              /* best match length so far */
+    int nice_match = s->nice_match;             /* stop if match long enough */
+    IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
+        s->strstart - (IPos)MAX_DIST(s) : NIL;
+    /* Stop when cur_match becomes <= limit. To simplify the code,
+     * we prevent matches with the string of window index 0.
+     */
+    Posf *prev = s->prev;
+    uInt wmask = s->w_mask;
+
+#ifdef UNALIGNED_OK
+    /* Compare two bytes at a time. Note: this is not always beneficial.
+     * Try with and without -DUNALIGNED_OK to check.
+     */
+    register Bytef *strend = s->window + s->strstart + MAX_MATCH - 1;
+    register ush scan_start = *(ushf*)scan;
+    register ush scan_end   = *(ushf*)(scan+best_len-1);
+#else
+    register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+    register Byte scan_end1  = scan[best_len-1];
+    register Byte scan_end   = scan[best_len];
+#endif
+
+    /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+     * It is easy to get rid of this optimization if necessary.
+     */
+    Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+    /* Do not waste too much time if we already have a good match: */
+    if (s->prev_length >= s->good_match) {
+        chain_length >>= 2;
+    }
+    /* Do not look for matches beyond the end of the input. This is necessary
+     * to make deflate deterministic.
+     */
+    if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
+
+    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+    do {
+        Assert(cur_match < s->strstart, "no future");
+        match = s->window + cur_match;
+
+        /* Skip to next match if the match length cannot increase
+         * or if the match length is less than 2:
+         */
+#if (defined(UNALIGNED_OK) && MAX_MATCH == 258)
+        /* This code assumes sizeof(unsigned short) == 2. Do not use
+         * UNALIGNED_OK if your compiler uses a different size.
+         */
+        if (*(ushf*)(match+best_len-1) != scan_end ||
+            *(ushf*)match != scan_start) continue;
+
+        /* It is not necessary to compare scan[2] and match[2] since they are
+         * always equal when the other bytes match, given that the hash keys
+         * are equal and that HASH_BITS >= 8. Compare 2 bytes at a time at
+         * strstart+3, +5, ... up to strstart+257. We check for insufficient
+         * lookahead only every 4th comparison; the 128th check will be made
+         * at strstart+257. If MAX_MATCH-2 is not a multiple of 8, it is
+         * necessary to put more guard bytes at the end of the window, or
+         * to check more often for insufficient lookahead.
+         */
+        Assert(scan[2] == match[2], "scan[2]?");
+        scan++, match++;
+        do {
+        } while (*(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+                 *(ushf*)(scan+=2) == *(ushf*)(match+=2) &&
+                 scan < strend);
+        /* The funny "do {}" generates better code on most compilers */
+
+        /* Here, scan <= window+strstart+257 */
+        Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+        if (*scan == *match) scan++;
+
+        len = (MAX_MATCH - 1) - (int)(strend-scan);
+        scan = strend - (MAX_MATCH-1);
+
+#else /* UNALIGNED_OK */
+
+        if (match[best_len]   != scan_end  ||
+            match[best_len-1] != scan_end1 ||
+            *match            != *scan     ||
+            *++match          != scan[1])      continue;
+
+        /* The check at best_len-1 can be removed because it will be made
+         * again later. (This heuristic is not always a win.)
+         * It is not necessary to compare scan[2] and match[2] since they
+         * are always equal when the other bytes match, given that
+         * the hash keys are equal and that HASH_BITS >= 8.
+         */
+        scan += 2, match++;
+        Assert(*scan == *match, "match[2]?");
+
+        /* We check for insufficient lookahead only every 8th comparison;
+         * the 256th check will be made at strstart+258.
+         */
+        do {
+        } while (*++scan == *++match && *++scan == *++match &&
+                 *++scan == *++match && *++scan == *++match &&
+                 *++scan == *++match && *++scan == *++match &&
+                 *++scan == *++match && *++scan == *++match &&
+                 scan < strend);
+
+        Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+        len = MAX_MATCH - (int)(strend - scan);
+        scan = strend - MAX_MATCH;
+
+#endif /* UNALIGNED_OK */
+
+        if (len > best_len) {
+            s->match_start = cur_match;
+            best_len = len;
+            if (len >= nice_match) break;
+#ifdef UNALIGNED_OK
+            scan_end = *(ushf*)(scan+best_len-1);
+#else
+            scan_end1  = scan[best_len-1];
+            scan_end   = scan[best_len];
+#endif
+        }
+    } while ((cur_match = prev[cur_match & wmask]) > limit
+             && --chain_length != 0);
+
+    if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
+    return s->lookahead;
+}
+
+#else /* FASTEST */
+/* ---------------------------------------------------------------------------
+ * Optimized version for level == 1 only
+ */
+local uInt longest_match(s, cur_match)
+    deflate_state *s;
+    IPos cur_match;                             /* current match */
+{
+    register Bytef *scan = s->window + s->strstart; /* current string */
+    register Bytef *match;                       /* matched string */
+    register int len;                           /* length of current match */
+    register Bytef *strend = s->window + s->strstart + MAX_MATCH;
+
+    /* The code is optimized for HASH_BITS >= 8 and MAX_MATCH-2 multiple of 16.
+     * It is easy to get rid of this optimization if necessary.
+     */
+    Assert(s->hash_bits >= 8 && MAX_MATCH == 258, "Code too clever");
+
+    Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
+
+    Assert(cur_match < s->strstart, "no future");
+
+    match = s->window + cur_match;
+
+    /* Return failure if the match length is less than 2:
+     */
+    if (match[0] != scan[0] || match[1] != scan[1]) return MIN_MATCH-1;
+
+    /* The check at best_len-1 can be removed because it will be made
+     * again later. (This heuristic is not always a win.)
+     * It is not necessary to compare scan[2] and match[2] since they
+     * are always equal when the other bytes match, given that
+     * the hash keys are equal and that HASH_BITS >= 8.
+     */
+    scan += 2, match += 2;
+    Assert(*scan == *match, "match[2]?");
+
+    /* We check for insufficient lookahead only every 8th comparison;
+     * the 256th check will be made at strstart+258.
+     */
+    do {
+    } while (*++scan == *++match && *++scan == *++match &&
+	     *++scan == *++match && *++scan == *++match &&
+	     *++scan == *++match && *++scan == *++match &&
+	     *++scan == *++match && *++scan == *++match &&
+	     scan < strend);
+
+    Assert(scan <= s->window+(unsigned)(s->window_size-1), "wild scan");
+
+    len = MAX_MATCH - (int)(strend - scan);
+
+    if (len < MIN_MATCH) return MIN_MATCH - 1;
+
+    s->match_start = cur_match;
+    return len <= s->lookahead ? len : s->lookahead;
+}
+#endif /* FASTEST */
+#endif /* ASMV */
+
+#ifdef DEBUG
+/* ===========================================================================
+ * Check that the match at match_start is indeed a match.
+ */
+local void check_match(s, start, match, length)
+    deflate_state *s;
+    IPos start, match;
+    int length;
+{
+    /* check that the match is indeed a match */
+    if (zmemcmp(s->window + match,
+                s->window + start, length) != EQUAL) {
+        fprintf(stderr, " start %u, match %u, length %d\n",
+		start, match, length);
+        do {
+	    fprintf(stderr, "%c%c", s->window[match++], s->window[start++]);
+	} while (--length != 0);
+        z_error("invalid match");
+    }
+    if (z_verbose > 1) {
+        fprintf(stderr,"\\[%d,%d]", start-match, length);
+        do { putc(s->window[start++], stderr); } while (--length != 0);
+    }
+}
+#else
+#  define check_match(s, start, match, length)
+#endif
+
+/* ===========================================================================
+ * Fill the window when the lookahead becomes insufficient.
+ * Updates strstart and lookahead.
+ *
+ * IN assertion: lookahead < MIN_LOOKAHEAD
+ * OUT assertions: strstart <= window_size-MIN_LOOKAHEAD
+ *    At least one byte has been read, or avail_in == 0; reads are
+ *    performed for at least two bytes (required for the zip translate_eol
+ *    option -- not supported here).
+ */
+local void fill_window(s)
+    deflate_state *s;
+{
+    register unsigned n, m;
+    register Posf *p;
+    unsigned more;    /* Amount of free space at the end of the window. */
+    uInt wsize = s->w_size;
+
+    do {
+        more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
+
+        /* Deal with !@#$% 64K limit: */
+        if (more == 0 && s->strstart == 0 && s->lookahead == 0) {
+            more = wsize;
+
+        } else if (more == (unsigned)(-1)) {
+            /* Very unlikely, but possible on 16 bit machine if strstart == 0
+             * and lookahead == 1 (input done one byte at time)
+             */
+            more--;
+
+        /* If the window is almost full and there is insufficient lookahead,
+         * move the upper half to the lower one to make room in the upper half.
+         */
+        } else if (s->strstart >= wsize+MAX_DIST(s)) {
+
+            zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
+            s->match_start -= wsize;
+            s->strstart    -= wsize; /* we now have strstart >= MAX_DIST */
+            s->block_start -= (long) wsize;
+
+            /* Slide the hash table (could be avoided with 32 bit values
+               at the expense of memory usage). We slide even when level == 0
+               to keep the hash table consistent if we switch back to level > 0
+               later. (Using level 0 permanently is not an optimal usage of
+               zlib, so we don't care about this pathological case.)
+             */
+	    n = s->hash_size;
+	    p = &s->head[n];
+	    do {
+		m = *--p;
+		*p = (Pos)(m >= wsize ? m-wsize : NIL);
+	    } while (--n);
+
+	    n = wsize;
+#ifndef FASTEST
+	    p = &s->prev[n];
+	    do {
+		m = *--p;
+		*p = (Pos)(m >= wsize ? m-wsize : NIL);
+		/* If n is not on any hash chain, prev[n] is garbage but
+		 * its value will never be used.
+		 */
+	    } while (--n);
+#endif
+            more += wsize;
+        }
+        if (s->strm->avail_in == 0) return;
+
+        /* If there was no sliding:
+         *    strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
+         *    more == window_size - lookahead - strstart
+         * => more >= window_size - (MIN_LOOKAHEAD-1 + WSIZE + MAX_DIST-1)
+         * => more >= window_size - 2*WSIZE + 2
+         * In the BIG_MEM or MMAP case (not yet supported),
+         *   window_size == input_size + MIN_LOOKAHEAD  &&
+         *   strstart + s->lookahead <= input_size => more >= MIN_LOOKAHEAD.
+         * Otherwise, window_size == 2*WSIZE so more >= 2.
+         * If there was sliding, more >= WSIZE. So in all cases, more >= 2.
+         */
+        Assert(more >= 2, "more < 2");
+
+        n = read_buf(s->strm, s->window + s->strstart + s->lookahead, more);
+        s->lookahead += n;
+
+        /* Initialize the hash value now that we have some input: */
+        if (s->lookahead >= MIN_MATCH) {
+            s->ins_h = s->window[s->strstart];
+            UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+#if MIN_MATCH != 3
+            Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+        }
+        /* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
+         * but this is not important since only literal bytes will be emitted.
+         */
+
+    } while (s->lookahead < MIN_LOOKAHEAD && s->strm->avail_in != 0);
+}
+
+/* ===========================================================================
+ * Flush the current block, with given end-of-file flag.
+ * IN assertion: strstart is set to the end of the current match.
+ */
+#define FLUSH_BLOCK_ONLY(s, eof) { \
+   _tr_flush_block(s, (s->block_start >= 0L ? \
+                   (charf *)&s->window[(unsigned)s->block_start] : \
+                   (charf *)Z_NULL), \
+		(ulg)((long)s->strstart - s->block_start), \
+		(eof)); \
+   s->block_start = s->strstart; \
+   flush_pending(s->strm); \
+   Tracev((stderr,"[FLUSH]")); \
+}
+
+/* Same but force premature exit if necessary. */
+#define FLUSH_BLOCK(s, eof) { \
+   FLUSH_BLOCK_ONLY(s, eof); \
+   if (s->strm->avail_out == 0) return (eof) ? finish_started : need_more; \
+}
+
+/* ===========================================================================
+ * Copy without compression as much as possible from the input stream, return
+ * the current block state.
+ * This function does not insert new strings in the dictionary since
+ * uncompressible data is probably not useful. This function is used
+ * only for the level=0 compression option.
+ * NOTE: this function should be optimized to avoid extra copying from
+ * window to pending_buf.
+ */
+local block_state deflate_stored(s, flush)
+    deflate_state *s;
+    int flush;
+{
+    /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
+     * to pending_buf_size, and each stored block has a 5 byte header:
+     */
+    ulg max_block_size = 0xffff;
+    ulg max_start;
+
+    if (max_block_size > s->pending_buf_size - 5) {
+        max_block_size = s->pending_buf_size - 5;
+    }
+
+    /* Copy as much as possible from input to output: */
+    for (;;) {
+        /* Fill the window as much as possible: */
+        if (s->lookahead <= 1) {
+
+            Assert(s->strstart < s->w_size+MAX_DIST(s) ||
+		   s->block_start >= (long)s->w_size, "slide too late");
+
+            fill_window(s);
+            if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
+
+            if (s->lookahead == 0) break; /* flush the current block */
+        }
+	Assert(s->block_start >= 0L, "block gone");
+
+	s->strstart += s->lookahead;
+	s->lookahead = 0;
+
+	/* Emit a stored block if pending_buf will be full: */
+ 	max_start = s->block_start + max_block_size;
+        if (s->strstart == 0 || (ulg)s->strstart >= max_start) {
+	    /* strstart == 0 is possible when wraparound on 16-bit machine */
+	    s->lookahead = (uInt)(s->strstart - max_start);
+	    s->strstart = (uInt)max_start;
+            FLUSH_BLOCK(s, 0);
+	}
+	/* Flush if we may have to slide, otherwise block_start may become
+         * negative and the data will be gone:
+         */
+        if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {
+            FLUSH_BLOCK(s, 0);
+	}
+    }
+    FLUSH_BLOCK(s, flush == Z_FINISH);
+    return flush == Z_FINISH ? finish_done : block_done;
+}
+
+/* ===========================================================================
+ * Compress as much as possible from the input stream, return the current
+ * block state.
+ * This function does not perform lazy evaluation of matches and inserts
+ * new strings in the dictionary only for unmatched strings or for short
+ * matches. It is used only for the fast compression options.
+ */
+local block_state deflate_fast(s, flush)
+    deflate_state *s;
+    int flush;
+{
+    IPos hash_head = NIL; /* head of the hash chain */
+    int bflush;           /* set if current block must be flushed */
+
+    for (;;) {
+        /* Make sure that we always have enough lookahead, except
+         * at the end of the input file. We need MAX_MATCH bytes
+         * for the next match, plus MIN_MATCH bytes to insert the
+         * string following the next match.
+         */
+        if (s->lookahead < MIN_LOOKAHEAD) {
+            fill_window(s);
+            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
+	        return need_more;
+	    }
+            if (s->lookahead == 0) break; /* flush the current block */
+        }
+
+        /* Insert the string window[strstart .. strstart+2] in the
+         * dictionary, and set hash_head to the head of the hash chain:
+         */
+        if (s->lookahead >= MIN_MATCH) {
+            INSERT_STRING(s, s->strstart, hash_head);
+        }
+
+        /* Find the longest match, discarding those <= prev_length.
+         * At this point we have always match_length < MIN_MATCH
+         */
+        if (hash_head != NIL && s->strstart - hash_head <= MAX_DIST(s)) {
+            /* To simplify the code, we prevent matches with the string
+             * of window index 0 (in particular we have to avoid a match
+             * of the string with itself at the start of the input file).
+             */
+            if (s->strategy != Z_HUFFMAN_ONLY) {
+                s->match_length = longest_match (s, hash_head);
+            }
+            /* longest_match() sets match_start */
+        }
+        if (s->match_length >= MIN_MATCH) {
+            check_match(s, s->strstart, s->match_start, s->match_length);
+
+            _tr_tally_dist(s, s->strstart - s->match_start,
+                           s->match_length - MIN_MATCH, bflush);
+
+            s->lookahead -= s->match_length;
+
+            /* Insert new strings in the hash table only if the match length
+             * is not too large. This saves time but degrades compression.
+             */
+#ifndef FASTEST
+            if (s->match_length <= s->max_insert_length &&
+                s->lookahead >= MIN_MATCH) {
+                s->match_length--; /* string at strstart already in hash table */
+                do {
+                    s->strstart++;
+                    INSERT_STRING(s, s->strstart, hash_head);
+                    /* strstart never exceeds WSIZE-MAX_MATCH, so there are
+                     * always MIN_MATCH bytes ahead.
+                     */
+                } while (--s->match_length != 0);
+                s->strstart++; 
+            } else
+#endif
+	    {
+                s->strstart += s->match_length;
+                s->match_length = 0;
+                s->ins_h = s->window[s->strstart];
+                UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+#if MIN_MATCH != 3
+                Call UPDATE_HASH() MIN_MATCH-3 more times
+#endif
+                /* If lookahead < MIN_MATCH, ins_h is garbage, but it does not
+                 * matter since it will be recomputed at next deflate call.
+                 */
+            }
+        } else {
+            /* No match, output a literal byte */
+            Tracevv((stderr,"%c", s->window[s->strstart]));
+            _tr_tally_lit (s, s->window[s->strstart], bflush);
+            s->lookahead--;
+            s->strstart++; 
+        }
+        if (bflush) FLUSH_BLOCK(s, 0);
+    }
+    FLUSH_BLOCK(s, flush == Z_FINISH);
+    return flush == Z_FINISH ? finish_done : block_done;
+}
+
+/* ===========================================================================
+ * Same as above, but achieves better compression. We use a lazy
+ * evaluation for matches: a match is finally adopted only if there is
+ * no better match at the next window position.
+ */
+local block_state deflate_slow(s, flush)
+    deflate_state *s;
+    int flush;
+{
+    IPos hash_head = NIL;    /* head of hash chain */
+    int bflush;              /* set if current block must be flushed */
+
+    /* Process the input block. */
+    for (;;) {
+        /* Make sure that we always have enough lookahead, except
+         * at the end of the input file. We need MAX_MATCH bytes
+         * for the next match, plus MIN_MATCH bytes to insert the
+         * string following the next match.
+         */
+        if (s->lookahead < MIN_LOOKAHEAD) {
+            fill_window(s);
+            if (s->lookahead < MIN_LOOKAHEAD && flush == Z_NO_FLUSH) {
+	        return need_more;
+	    }
+            if (s->lookahead == 0) break; /* flush the current block */
+        }
+
+        /* Insert the string window[strstart .. strstart+2] in the
+         * dictionary, and set hash_head to the head of the hash chain:
+         */
+        if (s->lookahead >= MIN_MATCH) {
+            INSERT_STRING(s, s->strstart, hash_head);
+        }
+
+        /* Find the longest match, discarding those <= prev_length.
+         */
+        s->prev_length = s->match_length, s->prev_match = s->match_start;
+        s->match_length = MIN_MATCH-1;
+
+        if (hash_head != NIL && s->prev_length < s->max_lazy_match &&
+            s->strstart - hash_head <= MAX_DIST(s)) {
+            /* To simplify the code, we prevent matches with the string
+             * of window index 0 (in particular we have to avoid a match
+             * of the string with itself at the start of the input file).
+             */
+            if (s->strategy != Z_HUFFMAN_ONLY) {
+                s->match_length = longest_match (s, hash_head);
+            }
+            /* longest_match() sets match_start */
+
+            if (s->match_length <= 5 && (s->strategy == Z_FILTERED ||
+                 (s->match_length == MIN_MATCH &&
+                  s->strstart - s->match_start > TOO_FAR))) {
+
+                /* If prev_match is also MIN_MATCH, match_start is garbage
+                 * but we will ignore the current match anyway.
+                 */
+                s->match_length = MIN_MATCH-1;
+            }
+        }
+        /* If there was a match at the previous step and the current
+         * match is not better, output the previous match:
+         */
+        if (s->prev_length >= MIN_MATCH && s->match_length <= s->prev_length) {
+            uInt max_insert = s->strstart + s->lookahead - MIN_MATCH;
+            /* Do not insert strings in hash table beyond this. */
+
+            check_match(s, s->strstart-1, s->prev_match, s->prev_length);
+
+            _tr_tally_dist(s, s->strstart -1 - s->prev_match,
+			   s->prev_length - MIN_MATCH, bflush);
+
+            /* Insert in hash table all strings up to the end of the match.
+             * strstart-1 and strstart are already inserted. If there is not
+             * enough lookahead, the last two strings are not inserted in
+             * the hash table.
+             */
+            s->lookahead -= s->prev_length-1;
+            s->prev_length -= 2;
+            do {
+                if (++s->strstart <= max_insert) {
+                    INSERT_STRING(s, s->strstart, hash_head);
+                }
+            } while (--s->prev_length != 0);
+            s->match_available = 0;
+            s->match_length = MIN_MATCH-1;
+            s->strstart++;
+
+            if (bflush) FLUSH_BLOCK(s, 0);
+
+        } else if (s->match_available) {
+            /* If there was no match at the previous position, output a
+             * single literal. If there was a match but the current match
+             * is longer, truncate the previous match to a single literal.
+             */
+            Tracevv((stderr,"%c", s->window[s->strstart-1]));
+	    _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+	    if (bflush) {
+                FLUSH_BLOCK_ONLY(s, 0);
+            }
+            s->strstart++;
+            s->lookahead--;
+            if (s->strm->avail_out == 0) return need_more;
+        } else {
+            /* There is no previous match to compare with, wait for
+             * the next step to decide.
+             */
+            s->match_available = 1;
+            s->strstart++;
+            s->lookahead--;
+        }
+    }
+    Assert (flush != Z_NO_FLUSH, "no flush?");
+    if (s->match_available) {
+        Tracevv((stderr,"%c", s->window[s->strstart-1]));
+        _tr_tally_lit(s, s->window[s->strstart-1], bflush);
+        s->match_available = 0;
+    }
+    FLUSH_BLOCK(s, flush == Z_FINISH);
+    return flush == Z_FINISH ? finish_done : block_done;
+}
diff --git a/common/zlib/deflate.h b/common/zlib/deflate.h
new file mode 100644
index 00000000..39cfaeb1
--- /dev/null
+++ b/common/zlib/deflate.h
@@ -0,0 +1,318 @@
+/* deflate.h -- internal compression state
+ * Copyright (C) 1995-2002 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* @(#) $Id: deflate.h,v 1.1 2004/10/08 09:44:24 const_k Exp $ */
+
+#ifndef _DEFLATE_H
+#define _DEFLATE_H
+
+#include "zutil.h"
+
+/* ===========================================================================
+ * Internal compression state.
+ */
+
+#define LENGTH_CODES 29
+/* number of length codes, not counting the special END_BLOCK code */
+
+#define LITERALS  256
+/* number of literal bytes 0..255 */
+
+#define L_CODES (LITERALS+1+LENGTH_CODES)
+/* number of Literal or Length codes, including the END_BLOCK code */
+
+#define D_CODES   30
+/* number of distance codes */
+
+#define BL_CODES  19
+/* number of codes used to transfer the bit lengths */
+
+#define HEAP_SIZE (2*L_CODES+1)
+/* maximum heap size */
+
+#define MAX_BITS 15
+/* All codes must not exceed MAX_BITS bits */
+
+#define INIT_STATE    42
+#define BUSY_STATE   113
+#define FINISH_STATE 666
+/* Stream status */
+
+
+/* Data structure describing a single value and its code string. */
+typedef struct ct_data_s {
+    union {
+        ush  freq;       /* frequency count */
+        ush  code;       /* bit string */
+    } fc;
+    union {
+        ush  dad;        /* father node in Huffman tree */
+        ush  len;        /* length of bit string */
+    } dl;
+} FAR ct_data;
+
+#define Freq fc.freq
+#define Code fc.code
+#define Dad  dl.dad
+#define Len  dl.len
+
+typedef struct static_tree_desc_s  static_tree_desc;
+
+typedef struct tree_desc_s {
+    ct_data *dyn_tree;           /* the dynamic tree */
+    int     max_code;            /* largest code with non zero frequency */
+    static_tree_desc *stat_desc; /* the corresponding static tree */
+} FAR tree_desc;
+
+typedef ush Pos;
+typedef Pos FAR Posf;
+typedef unsigned IPos;
+
+/* A Pos is an index in the character window. We use short instead of int to
+ * save space in the various tables. IPos is used only for parameter passing.
+ */
+
+typedef struct internal_state {
+    z_streamp strm;      /* pointer back to this zlib stream */
+    int   status;        /* as the name implies */
+    Bytef *pending_buf;  /* output still pending */
+    ulg   pending_buf_size; /* size of pending_buf */
+    Bytef *pending_out;  /* next pending byte to output to the stream */
+    int   pending;       /* nb of bytes in the pending buffer */
+    int   noheader;      /* suppress zlib header and adler32 */
+    Byte  data_type;     /* UNKNOWN, BINARY or ASCII */
+    Byte  method;        /* STORED (for zip only) or DEFLATED */
+    int   last_flush;    /* value of flush param for previous deflate call */
+
+                /* used by deflate.c: */
+
+    uInt  w_size;        /* LZ77 window size (32K by default) */
+    uInt  w_bits;        /* log2(w_size)  (8..16) */
+    uInt  w_mask;        /* w_size - 1 */
+
+    Bytef *window;
+    /* Sliding window. Input bytes are read into the second half of the window,
+     * and move to the first half later to keep a dictionary of at least wSize
+     * bytes. With this organization, matches are limited to a distance of
+     * wSize-MAX_MATCH bytes, but this ensures that IO is always
+     * performed with a length multiple of the block size. Also, it limits
+     * the window size to 64K, which is quite useful on MSDOS.
+     * To do: use the user input buffer as sliding window.
+     */
+
+    ulg window_size;
+    /* Actual size of window: 2*wSize, except when the user input buffer
+     * is directly used as sliding window.
+     */
+
+    Posf *prev;
+    /* Link to older string with same hash index. To limit the size of this
+     * array to 64K, this link is maintained only for the last 32K strings.
+     * An index in this array is thus a window index modulo 32K.
+     */
+
+    Posf *head; /* Heads of the hash chains or NIL. */
+
+    uInt  ins_h;          /* hash index of string to be inserted */
+    uInt  hash_size;      /* number of elements in hash table */
+    uInt  hash_bits;      /* log2(hash_size) */
+    uInt  hash_mask;      /* hash_size-1 */
+
+    uInt  hash_shift;
+    /* Number of bits by which ins_h must be shifted at each input
+     * step. It must be such that after MIN_MATCH steps, the oldest
+     * byte no longer takes part in the hash key, that is:
+     *   hash_shift * MIN_MATCH >= hash_bits
+     */
+
+    long block_start;
+    /* Window position at the beginning of the current output block. Gets
+     * negative when the window is moved backwards.
+     */
+
+    uInt match_length;           /* length of best match */
+    IPos prev_match;             /* previous match */
+    int match_available;         /* set if previous match exists */
+    uInt strstart;               /* start of string to insert */
+    uInt match_start;            /* start of matching string */
+    uInt lookahead;              /* number of valid bytes ahead in window */
+
+    uInt prev_length;
+    /* Length of the best match at previous step. Matches not greater than this
+     * are discarded. This is used in the lazy match evaluation.
+     */
+
+    uInt max_chain_length;
+    /* To speed up deflation, hash chains are never searched beyond this
+     * length.  A higher limit improves compression ratio but degrades the
+     * speed.
+     */
+
+    uInt max_lazy_match;
+    /* Attempt to find a better match only when the current match is strictly
+     * smaller than this value. This mechanism is used only for compression
+     * levels >= 4.
+     */
+#   define max_insert_length  max_lazy_match
+    /* Insert new strings in the hash table only if the match length is not
+     * greater than this length. This saves time but degrades compression.
+     * max_insert_length is used only for compression levels <= 3.
+     */
+
+    int level;    /* compression level (1..9) */
+    int strategy; /* favor or force Huffman coding*/
+
+    uInt good_match;
+    /* Use a faster search when the previous match is longer than this */
+
+    int nice_match; /* Stop searching when current match exceeds this */
+
+                /* used by trees.c: */
+    /* Didn't use ct_data typedef below to supress compiler warning */
+    struct ct_data_s dyn_ltree[HEAP_SIZE];   /* literal and length tree */
+    struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
+    struct ct_data_s bl_tree[2*BL_CODES+1];  /* Huffman tree for bit lengths */
+
+    struct tree_desc_s l_desc;               /* desc. for literal tree */
+    struct tree_desc_s d_desc;               /* desc. for distance tree */
+    struct tree_desc_s bl_desc;              /* desc. for bit length tree */
+
+    ush bl_count[MAX_BITS+1];
+    /* number of codes at each bit length for an optimal tree */
+
+    int heap[2*L_CODES+1];      /* heap used to build the Huffman trees */
+    int heap_len;               /* number of elements in the heap */
+    int heap_max;               /* element of largest frequency */
+    /* The sons of heap[n] are heap[2*n] and heap[2*n+1]. heap[0] is not used.
+     * The same heap array is used to build all trees.
+     */
+
+    uch depth[2*L_CODES+1];
+    /* Depth of each subtree used as tie breaker for trees of equal frequency
+     */
+
+    uchf *l_buf;          /* buffer for literals or lengths */
+
+    uInt  lit_bufsize;
+    /* Size of match buffer for literals/lengths.  There are 4 reasons for
+     * limiting lit_bufsize to 64K:
+     *   - frequencies can be kept in 16 bit counters
+     *   - if compression is not successful for the first block, all input
+     *     data is still in the window so we can still emit a stored block even
+     *     when input comes from standard input.  (This can also be done for
+     *     all blocks if lit_bufsize is not greater than 32K.)
+     *   - if compression is not successful for a file smaller than 64K, we can
+     *     even emit a stored file instead of a stored block (saving 5 bytes).
+     *     This is applicable only for zip (not gzip or zlib).
+     *   - creating new Huffman trees less frequently may not provide fast
+     *     adaptation to changes in the input data statistics. (Take for
+     *     example a binary file with poorly compressible code followed by
+     *     a highly compressible string table.) Smaller buffer sizes give
+     *     fast adaptation but have of course the overhead of transmitting
+     *     trees more frequently.
+     *   - I can't count above 4
+     */
+
+    uInt last_lit;      /* running index in l_buf */
+
+    ushf *d_buf;
+    /* Buffer for distances. To simplify the code, d_buf and l_buf have
+     * the same number of elements. To use different lengths, an extra flag
+     * array would be necessary.
+     */
+
+    ulg opt_len;        /* bit length of current block with optimal trees */
+    ulg static_len;     /* bit length of current block with static trees */
+    uInt matches;       /* number of string matches in current block */
+    int last_eob_len;   /* bit length of EOB code for last block */
+
+#ifdef DEBUG
+    ulg compressed_len; /* total bit length of compressed file mod 2^32 */
+    ulg bits_sent;      /* bit length of compressed data sent mod 2^32 */
+#endif
+
+    ush bi_buf;
+    /* Output buffer. bits are inserted starting at the bottom (least
+     * significant bits).
+     */
+    int bi_valid;
+    /* Number of valid bits in bi_buf.  All bits above the last valid bit
+     * are always zero.
+     */
+
+} FAR deflate_state;
+
+/* Output a byte on the stream.
+ * IN assertion: there is enough room in pending_buf.
+ */
+#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
+
+
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+/* Minimum amount of lookahead, except at the end of the input file.
+ * See deflate.c for comments about the MIN_MATCH+1.
+ */
+
+#define MAX_DIST(s)  ((s)->w_size-MIN_LOOKAHEAD)
+/* In order to simplify the code, particularly on 16 bit machines, match
+ * distances are limited to MAX_DIST instead of WSIZE.
+ */
+
+        /* in trees.c */
+void _tr_init         OF((deflate_state *s));
+int  _tr_tally        OF((deflate_state *s, unsigned dist, unsigned lc));
+void _tr_flush_block  OF((deflate_state *s, charf *buf, ulg stored_len,
+			  int eof));
+void _tr_align        OF((deflate_state *s));
+void _tr_stored_block OF((deflate_state *s, charf *buf, ulg stored_len,
+                          int eof));
+
+#define d_code(dist) \
+   ((dist) < 256 ? _dist_code[dist] : _dist_code[256+((dist)>>7)])
+/* Mapping from a distance to a distance code. dist is the distance - 1 and
+ * must not have side effects. _dist_code[256] and _dist_code[257] are never
+ * used.
+ */
+
+#ifndef DEBUG
+/* Inline versions of _tr_tally for speed: */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+  extern uch _length_code[];
+  extern uch _dist_code[];
+#else
+  extern const uch _length_code[];
+  extern const uch _dist_code[];
+#endif
+
+# define _tr_tally_lit(s, c, flush) \
+  { uch cc = (c); \
+    s->d_buf[s->last_lit] = 0; \
+    s->l_buf[s->last_lit++] = cc; \
+    s->dyn_ltree[cc].Freq++; \
+    flush = (s->last_lit == s->lit_bufsize-1); \
+   }
+# define _tr_tally_dist(s, distance, length, flush) \
+  { uch len = (length); \
+    ush dist = (distance); \
+    s->d_buf[s->last_lit] = dist; \
+    s->l_buf[s->last_lit++] = len; \
+    dist--; \
+    s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
+    s->dyn_dtree[d_code(dist)].Freq++; \
+    flush = (s->last_lit == s->lit_bufsize-1); \
+  }
+#else
+# define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
+# define _tr_tally_dist(s, distance, length, flush) \
+              flush = _tr_tally(s, distance, length) 
+#endif
+
+#endif
diff --git a/common/zlib/descrip.mms b/common/zlib/descrip.mms
new file mode 100644
index 00000000..9d364598
--- /dev/null
+++ b/common/zlib/descrip.mms
@@ -0,0 +1,48 @@
+# descrip.mms: MMS description file for building zlib on VMS
+# written by Martin P.J. Zinser <m.zinser@gsi.de>
+
+cc_defs = 
+c_deb = 
+
+.ifdef __DECC__
+pref = /prefix=all
+.endif
+
+OBJS = adler32.obj, compress.obj, crc32.obj, gzio.obj, uncompr.obj,\
+       deflate.obj, trees.obj, zutil.obj, inflate.obj, infblock.obj,\
+       inftrees.obj, infcodes.obj, infutil.obj, inffast.obj
+
+CFLAGS= $(C_DEB) $(CC_DEFS) $(PREF)
+
+all : example.exe minigzip.exe
+        @ write sys$output " Example applications available"
+libz.olb : libz.olb($(OBJS))
+	@ write sys$output " libz available"
+
+example.exe : example.obj libz.olb
+              link example,libz.olb/lib
+
+minigzip.exe : minigzip.obj libz.olb
+              link minigzip,libz.olb/lib,x11vms:xvmsutils.olb/lib
+
+clean : 
+	delete *.obj;*,libz.olb;*
+
+
+# Other dependencies.
+adler32.obj : zutil.h zlib.h zconf.h
+compress.obj : zlib.h zconf.h
+crc32.obj : zutil.h zlib.h zconf.h
+deflate.obj : deflate.h zutil.h zlib.h zconf.h
+example.obj : zlib.h zconf.h
+gzio.obj : zutil.h zlib.h zconf.h
+infblock.obj : zutil.h zlib.h zconf.h infblock.h inftrees.h infcodes.h infutil.h
+infcodes.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h infcodes.h inffast.h
+inffast.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h inffast.h
+inflate.obj : zutil.h zlib.h zconf.h infblock.h
+inftrees.obj : zutil.h zlib.h zconf.h inftrees.h
+infutil.obj : zutil.h zlib.h zconf.h inftrees.h infutil.h
+minigzip.obj : zlib.h zconf.h
+trees.obj : deflate.h zutil.h zlib.h zconf.h
+uncompr.obj : zlib.h zconf.h
+zutil.obj : zutil.h zlib.h zconf.h
diff --git a/common/zlib/example.c b/common/zlib/example.c
new file mode 100644
index 00000000..255662f2
--- /dev/null
+++ b/common/zlib/example.c
@@ -0,0 +1,556 @@
+/* example.c -- usage example of the zlib compression library
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* @(#) $Id: example.c,v 1.1 2004/10/08 09:44:25 const_k Exp $ */
+
+#include <stdio.h>
+#include "zlib.h"
+
+#ifdef STDC
+#  include <string.h>
+#  include <stdlib.h>
+#else
+   extern void exit  OF((int));
+#endif
+
+#if defined(VMS) || defined(RISCOS)
+#  define TESTFILE "foo-gz"
+#else
+#  define TESTFILE "foo.gz"
+#endif
+
+#define CHECK_ERR(err, msg) { \
+    if (err != Z_OK) { \
+        fprintf(stderr, "%s error: %d\n", msg, err); \
+        exit(1); \
+    } \
+}
+
+const char hello[] = "hello, hello!";
+/* "hello world" would be more standard, but the repeated "hello"
+ * stresses the compression code better, sorry...
+ */
+
+const char dictionary[] = "hello";
+uLong dictId; /* Adler32 value of the dictionary */
+
+void test_compress      OF((Byte *compr, uLong comprLen,
+		            Byte *uncompr, uLong uncomprLen));
+void test_gzio          OF((const char *out, const char *in, 
+		            Byte *uncompr, int uncomprLen));
+void test_deflate       OF((Byte *compr, uLong comprLen));
+void test_inflate       OF((Byte *compr, uLong comprLen,
+		            Byte *uncompr, uLong uncomprLen));
+void test_large_deflate OF((Byte *compr, uLong comprLen,
+		            Byte *uncompr, uLong uncomprLen));
+void test_large_inflate OF((Byte *compr, uLong comprLen,
+		            Byte *uncompr, uLong uncomprLen));
+void test_flush         OF((Byte *compr, uLong *comprLen));
+void test_sync          OF((Byte *compr, uLong comprLen,
+		            Byte *uncompr, uLong uncomprLen));
+void test_dict_deflate  OF((Byte *compr, uLong comprLen));
+void test_dict_inflate  OF((Byte *compr, uLong comprLen,
+		            Byte *uncompr, uLong uncomprLen));
+int  main               OF((int argc, char *argv[]));
+
+/* ===========================================================================
+ * Test compress() and uncompress()
+ */
+void test_compress(compr, comprLen, uncompr, uncomprLen)
+    Byte *compr, *uncompr;
+    uLong comprLen, uncomprLen;
+{
+    int err;
+    uLong len = strlen(hello)+1;
+
+    err = compress(compr, &comprLen, (const Bytef*)hello, len);
+    CHECK_ERR(err, "compress");
+
+    strcpy((char*)uncompr, "garbage");
+
+    err = uncompress(uncompr, &uncomprLen, compr, comprLen);
+    CHECK_ERR(err, "uncompress");
+
+    if (strcmp((char*)uncompr, hello)) {
+        fprintf(stderr, "bad uncompress\n");
+	exit(1);
+    } else {
+        printf("uncompress(): %s\n", (char *)uncompr);
+    }
+}
+
+/* ===========================================================================
+ * Test read/write of .gz files
+ */
+void test_gzio(out, in, uncompr, uncomprLen)
+    const char *out; /* compressed output file */
+    const char *in;  /* compressed input file */
+    Byte *uncompr;
+    int  uncomprLen;
+{
+    int err;
+    int len = strlen(hello)+1;
+    gzFile file;
+    z_off_t pos;
+
+    file = gzopen(out, "wb");
+    if (file == NULL) {
+        fprintf(stderr, "gzopen error\n");
+        exit(1);
+    }
+    gzputc(file, 'h');
+    if (gzputs(file, "ello") != 4) {
+        fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
+	exit(1);
+    }
+    if (gzprintf(file, ", %s!", "hello") != 8) {
+        fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
+	exit(1);
+    }
+    gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
+    gzclose(file);
+
+    file = gzopen(in, "rb");
+    if (file == NULL) {
+        fprintf(stderr, "gzopen error\n");
+    }
+    strcpy((char*)uncompr, "garbage");
+
+    uncomprLen = gzread(file, uncompr, (unsigned)uncomprLen);
+    if (uncomprLen != len) {
+        fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
+	exit(1);
+    }
+    if (strcmp((char*)uncompr, hello)) {
+        fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
+	exit(1);
+    } else {
+        printf("gzread(): %s\n", (char *)uncompr);
+    }
+
+    pos = gzseek(file, -8L, SEEK_CUR);
+    if (pos != 6 || gztell(file) != pos) {
+	fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
+		(long)pos, (long)gztell(file));
+	exit(1);
+    }
+
+    if (gzgetc(file) != ' ') {
+	fprintf(stderr, "gzgetc error\n");
+	exit(1);
+    }
+
+    gzgets(file, (char*)uncompr, uncomprLen);
+    uncomprLen = strlen((char*)uncompr);
+    if (uncomprLen != 6) { /* "hello!" */
+        fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
+	exit(1);
+    }
+    if (strcmp((char*)uncompr, hello+7)) {
+        fprintf(stderr, "bad gzgets after gzseek\n");
+	exit(1);
+    } else {
+        printf("gzgets() after gzseek: %s\n", (char *)uncompr);
+    }
+
+    gzclose(file);
+}
+
+/* ===========================================================================
+ * Test deflate() with small buffers
+ */
+void test_deflate(compr, comprLen)
+    Byte *compr;
+    uLong comprLen;
+{
+    z_stream c_stream; /* compression stream */
+    int err;
+    int len = strlen(hello)+1;
+
+    c_stream.zalloc = (alloc_func)0;
+    c_stream.zfree = (free_func)0;
+    c_stream.opaque = (voidpf)0;
+
+    err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
+    CHECK_ERR(err, "deflateInit");
+
+    c_stream.next_in  = (Bytef*)hello;
+    c_stream.next_out = compr;
+
+    while (c_stream.total_in != (uLong)len && c_stream.total_out < comprLen) {
+        c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
+        err = deflate(&c_stream, Z_NO_FLUSH);
+        CHECK_ERR(err, "deflate");
+    }
+    /* Finish the stream, still forcing small buffers: */
+    for (;;) {
+        c_stream.avail_out = 1;
+        err = deflate(&c_stream, Z_FINISH);
+        if (err == Z_STREAM_END) break;
+        CHECK_ERR(err, "deflate");
+    }
+
+    err = deflateEnd(&c_stream);
+    CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with small buffers
+ */
+void test_inflate(compr, comprLen, uncompr, uncomprLen)
+    Byte *compr, *uncompr;
+    uLong comprLen, uncomprLen;
+{
+    int err;
+    z_stream d_stream; /* decompression stream */
+
+    strcpy((char*)uncompr, "garbage");
+
+    d_stream.zalloc = (alloc_func)0;
+    d_stream.zfree = (free_func)0;
+    d_stream.opaque = (voidpf)0;
+
+    d_stream.next_in  = compr;
+    d_stream.avail_in = 0;
+    d_stream.next_out = uncompr;
+
+    err = inflateInit(&d_stream);
+    CHECK_ERR(err, "inflateInit");
+
+    while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
+        d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
+        err = inflate(&d_stream, Z_NO_FLUSH);
+        if (err == Z_STREAM_END) break;
+        CHECK_ERR(err, "inflate");
+    }
+
+    err = inflateEnd(&d_stream);
+    CHECK_ERR(err, "inflateEnd");
+
+    if (strcmp((char*)uncompr, hello)) {
+        fprintf(stderr, "bad inflate\n");
+	exit(1);
+    } else {
+        printf("inflate(): %s\n", (char *)uncompr);
+    }
+}
+
+/* ===========================================================================
+ * Test deflate() with large buffers and dynamic change of compression level
+ */
+void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
+    Byte *compr, *uncompr;
+    uLong comprLen, uncomprLen;
+{
+    z_stream c_stream; /* compression stream */
+    int err;
+
+    c_stream.zalloc = (alloc_func)0;
+    c_stream.zfree = (free_func)0;
+    c_stream.opaque = (voidpf)0;
+
+    err = deflateInit(&c_stream, Z_BEST_SPEED);
+    CHECK_ERR(err, "deflateInit");
+
+    c_stream.next_out = compr;
+    c_stream.avail_out = (uInt)comprLen;
+
+    /* At this point, uncompr is still mostly zeroes, so it should compress
+     * very well:
+     */
+    c_stream.next_in = uncompr;
+    c_stream.avail_in = (uInt)uncomprLen;
+    err = deflate(&c_stream, Z_NO_FLUSH);
+    CHECK_ERR(err, "deflate");
+    if (c_stream.avail_in != 0) {
+        fprintf(stderr, "deflate not greedy\n");
+	exit(1);
+    }
+
+    /* Feed in already compressed data and switch to no compression: */
+    deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
+    c_stream.next_in = compr;
+    c_stream.avail_in = (uInt)comprLen/2;
+    err = deflate(&c_stream, Z_NO_FLUSH);
+    CHECK_ERR(err, "deflate");
+
+    /* Switch back to compressing mode: */
+    deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
+    c_stream.next_in = uncompr;
+    c_stream.avail_in = (uInt)uncomprLen;
+    err = deflate(&c_stream, Z_NO_FLUSH);
+    CHECK_ERR(err, "deflate");
+
+    err = deflate(&c_stream, Z_FINISH);
+    if (err != Z_STREAM_END) {
+        fprintf(stderr, "deflate should report Z_STREAM_END\n");
+	exit(1);
+    }
+    err = deflateEnd(&c_stream);
+    CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with large buffers
+ */
+void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
+    Byte *compr, *uncompr;
+    uLong comprLen, uncomprLen;
+{
+    int err;
+    z_stream d_stream; /* decompression stream */
+
+    strcpy((char*)uncompr, "garbage");
+
+    d_stream.zalloc = (alloc_func)0;
+    d_stream.zfree = (free_func)0;
+    d_stream.opaque = (voidpf)0;
+
+    d_stream.next_in  = compr;
+    d_stream.avail_in = (uInt)comprLen;
+
+    err = inflateInit(&d_stream);
+    CHECK_ERR(err, "inflateInit");
+
+    for (;;) {
+        d_stream.next_out = uncompr;            /* discard the output */
+	d_stream.avail_out = (uInt)uncomprLen;
+        err = inflate(&d_stream, Z_NO_FLUSH);
+        if (err == Z_STREAM_END) break;
+        CHECK_ERR(err, "large inflate");
+    }
+
+    err = inflateEnd(&d_stream);
+    CHECK_ERR(err, "inflateEnd");
+
+    if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
+        fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
+	exit(1);
+    } else {
+        printf("large_inflate(): OK\n");
+    }
+}
+
+/* ===========================================================================
+ * Test deflate() with full flush
+ */
+void test_flush(compr, comprLen)
+    Byte *compr;
+    uLong *comprLen;
+{
+    z_stream c_stream; /* compression stream */
+    int err;
+    int len = strlen(hello)+1;
+
+    c_stream.zalloc = (alloc_func)0;
+    c_stream.zfree = (free_func)0;
+    c_stream.opaque = (voidpf)0;
+
+    err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
+    CHECK_ERR(err, "deflateInit");
+
+    c_stream.next_in  = (Bytef*)hello;
+    c_stream.next_out = compr;
+    c_stream.avail_in = 3;
+    c_stream.avail_out = (uInt)*comprLen;
+    err = deflate(&c_stream, Z_FULL_FLUSH);
+    CHECK_ERR(err, "deflate");
+
+    compr[3]++; /* force an error in first compressed block */
+    c_stream.avail_in = len - 3;
+
+    err = deflate(&c_stream, Z_FINISH);
+    if (err != Z_STREAM_END) {
+        CHECK_ERR(err, "deflate");
+    }
+    err = deflateEnd(&c_stream);
+    CHECK_ERR(err, "deflateEnd");
+
+    *comprLen = c_stream.total_out;
+}
+
+/* ===========================================================================
+ * Test inflateSync()
+ */
+void test_sync(compr, comprLen, uncompr, uncomprLen)
+    Byte *compr, *uncompr;
+    uLong comprLen, uncomprLen;
+{
+    int err;
+    z_stream d_stream; /* decompression stream */
+
+    strcpy((char*)uncompr, "garbage");
+
+    d_stream.zalloc = (alloc_func)0;
+    d_stream.zfree = (free_func)0;
+    d_stream.opaque = (voidpf)0;
+
+    d_stream.next_in  = compr;
+    d_stream.avail_in = 2; /* just read the zlib header */
+
+    err = inflateInit(&d_stream);
+    CHECK_ERR(err, "inflateInit");
+
+    d_stream.next_out = uncompr;
+    d_stream.avail_out = (uInt)uncomprLen;
+
+    inflate(&d_stream, Z_NO_FLUSH);
+    CHECK_ERR(err, "inflate");
+
+    d_stream.avail_in = (uInt)comprLen-2;   /* read all compressed data */
+    err = inflateSync(&d_stream);           /* but skip the damaged part */
+    CHECK_ERR(err, "inflateSync");
+
+    err = inflate(&d_stream, Z_FINISH);
+    if (err != Z_DATA_ERROR) {
+        fprintf(stderr, "inflate should report DATA_ERROR\n");
+        /* Because of incorrect adler32 */
+	exit(1);
+    }
+    err = inflateEnd(&d_stream);
+    CHECK_ERR(err, "inflateEnd");
+
+    printf("after inflateSync(): hel%s\n", (char *)uncompr);
+}
+
+/* ===========================================================================
+ * Test deflate() with preset dictionary
+ */
+void test_dict_deflate(compr, comprLen)
+    Byte *compr;
+    uLong comprLen;
+{
+    z_stream c_stream; /* compression stream */
+    int err;
+
+    c_stream.zalloc = (alloc_func)0;
+    c_stream.zfree = (free_func)0;
+    c_stream.opaque = (voidpf)0;
+
+    err = deflateInit(&c_stream, Z_BEST_COMPRESSION);
+    CHECK_ERR(err, "deflateInit");
+
+    err = deflateSetDictionary(&c_stream,
+			       (const Bytef*)dictionary, sizeof(dictionary));
+    CHECK_ERR(err, "deflateSetDictionary");
+
+    dictId = c_stream.adler;
+    c_stream.next_out = compr;
+    c_stream.avail_out = (uInt)comprLen;
+
+    c_stream.next_in = (Bytef*)hello;
+    c_stream.avail_in = (uInt)strlen(hello)+1;
+
+    err = deflate(&c_stream, Z_FINISH);
+    if (err != Z_STREAM_END) {
+        fprintf(stderr, "deflate should report Z_STREAM_END\n");
+	exit(1);
+    }
+    err = deflateEnd(&c_stream);
+    CHECK_ERR(err, "deflateEnd");
+}
+
+/* ===========================================================================
+ * Test inflate() with a preset dictionary
+ */
+void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
+    Byte *compr, *uncompr;
+    uLong comprLen, uncomprLen;
+{
+    int err;
+    z_stream d_stream; /* decompression stream */
+
+    strcpy((char*)uncompr, "garbage");
+
+    d_stream.zalloc = (alloc_func)0;
+    d_stream.zfree = (free_func)0;
+    d_stream.opaque = (voidpf)0;
+
+    d_stream.next_in  = compr;
+    d_stream.avail_in = (uInt)comprLen;
+
+    err = inflateInit(&d_stream);
+    CHECK_ERR(err, "inflateInit");
+
+    d_stream.next_out = uncompr;
+    d_stream.avail_out = (uInt)uncomprLen;
+
+    for (;;) {
+        err = inflate(&d_stream, Z_NO_FLUSH);
+        if (err == Z_STREAM_END) break;
+	if (err == Z_NEED_DICT) {
+	    if (d_stream.adler != dictId) {
+		fprintf(stderr, "unexpected dictionary");
+		exit(1);
+	    }
+	    err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
+				       sizeof(dictionary));
+	}
+        CHECK_ERR(err, "inflate with dict");
+    }
+
+    err = inflateEnd(&d_stream);
+    CHECK_ERR(err, "inflateEnd");
+
+    if (strcmp((char*)uncompr, hello)) {
+        fprintf(stderr, "bad inflate with dict\n");
+	exit(1);
+    } else {
+        printf("inflate with dictionary: %s\n", (char *)uncompr);
+    }
+}
+
+/* ===========================================================================
+ * Usage:  example [output.gz  [input.gz]]
+ */
+
+int main(argc, argv)
+    int argc;
+    char *argv[];
+{
+    Byte *compr, *uncompr;
+    uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
+    uLong uncomprLen = comprLen;
+    static const char* myVersion = ZLIB_VERSION;
+
+    if (zlibVersion()[0] != myVersion[0]) {
+        fprintf(stderr, "incompatible zlib version\n");
+        exit(1);
+
+    } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
+        fprintf(stderr, "warning: different zlib version\n");
+    }
+
+    compr    = (Byte*)calloc((uInt)comprLen, 1);
+    uncompr  = (Byte*)calloc((uInt)uncomprLen, 1);
+    /* compr and uncompr are cleared to avoid reading uninitialized
+     * data and to ensure that uncompr compresses well.
+     */
+    if (compr == Z_NULL || uncompr == Z_NULL) {
+        printf("out of memory\n");
+	exit(1);
+    }
+    test_compress(compr, comprLen, uncompr, uncomprLen);
+
+    test_gzio((argc > 1 ? argv[1] : TESTFILE),
+              (argc > 2 ? argv[2] : TESTFILE),
+	      uncompr, (int)uncomprLen);
+
+    test_deflate(compr, comprLen);
+    test_inflate(compr, comprLen, uncompr, uncomprLen);
+
+    test_large_deflate(compr, comprLen, uncompr, uncomprLen);
+    test_large_inflate(compr, comprLen, uncompr, uncomprLen);
+
+    test_flush(compr, &comprLen);
+    test_sync(compr, comprLen, uncompr, uncomprLen);
+    comprLen = uncomprLen;
+
+    test_dict_deflate(compr, comprLen);
+    test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
+
+    exit(0);
+    return 0; /* to avoid warning */
+}
diff --git a/common/zlib/gzio.c b/common/zlib/gzio.c
new file mode 100644
index 00000000..518b573b
--- /dev/null
+++ b/common/zlib/gzio.c
@@ -0,0 +1,875 @@
+/* gzio.c -- IO on .gz files
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+ * Compile this file with -DNO_DEFLATE to avoid the compression code.
+ */
+
+/* @(#) $Id: gzio.c,v 1.1 2004/10/08 09:44:25 const_k Exp $ */
+
+#include <stdio.h>
+
+#include "zutil.h"
+
+struct internal_state {int dummy;}; /* for buggy compilers */
+
+#ifndef Z_BUFSIZE
+#  ifdef MAXSEG_64K
+#    define Z_BUFSIZE 4096 /* minimize memory usage for 16-bit DOS */
+#  else
+#    define Z_BUFSIZE 16384
+#  endif
+#endif
+#ifndef Z_PRINTF_BUFSIZE
+#  define Z_PRINTF_BUFSIZE 4096
+#endif
+
+#define ALLOC(size) malloc(size)
+#define TRYFREE(p) {if (p) free(p);}
+
+static int gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
+
+/* gzip flag byte */
+#define ASCII_FLAG   0x01 /* bit 0 set: file probably ascii text */
+#define HEAD_CRC     0x02 /* bit 1 set: header CRC present */
+#define EXTRA_FIELD  0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME    0x08 /* bit 3 set: original file name present */
+#define COMMENT      0x10 /* bit 4 set: file comment present */
+#define RESERVED     0xE0 /* bits 5..7: reserved */
+
+typedef struct gz_stream {
+    z_stream stream;
+    int      z_err;   /* error code for last stream operation */
+    int      z_eof;   /* set if end of input file */
+    FILE     *file;   /* .gz file */
+    Byte     *inbuf;  /* input buffer */
+    Byte     *outbuf; /* output buffer */
+    uLong    crc;     /* crc32 of uncompressed data */
+    char     *msg;    /* error message */
+    char     *path;   /* path name for debugging only */
+    int      transparent; /* 1 if input file is not a .gz file */
+    char     mode;    /* 'w' or 'r' */
+    long     startpos; /* start of compressed data in file (header skipped) */
+} gz_stream;
+
+
+local gzFile gz_open      OF((const char *path, const char *mode, int  fd));
+local int do_flush        OF((gzFile file, int flush));
+local int    get_byte     OF((gz_stream *s));
+local void   check_header OF((gz_stream *s));
+local int    destroy      OF((gz_stream *s));
+local void   putLong      OF((FILE *file, uLong x));
+local uLong  getLong      OF((gz_stream *s));
+
+/* ===========================================================================
+     Opens a gzip (.gz) file for reading or writing. The mode parameter
+   is as in fopen ("rb" or "wb"). The file is given either by file descriptor
+   or path name (if fd == -1).
+     gz_open return NULL if the file could not be opened or if there was
+   insufficient memory to allocate the (de)compression state; errno
+   can be checked to distinguish the two cases (if errno is zero, the
+   zlib error is Z_MEM_ERROR).
+*/
+local gzFile gz_open (path, mode, fd)
+    const char *path;
+    const char *mode;
+    int  fd;
+{
+    int err;
+    int level = Z_DEFAULT_COMPRESSION; /* compression level */
+    int strategy = Z_DEFAULT_STRATEGY; /* compression strategy */
+    char *p = (char*)mode;
+    gz_stream *s;
+    char fmode[80]; /* copy of mode, without the compression level */
+    char *m = fmode;
+
+    if (!path || !mode) return Z_NULL;
+
+    s = (gz_stream *)ALLOC(sizeof(gz_stream));
+    if (!s) return Z_NULL;
+
+    s->stream.zalloc = (alloc_func)0;
+    s->stream.zfree = (free_func)0;
+    s->stream.opaque = (voidpf)0;
+    s->stream.next_in = s->inbuf = Z_NULL;
+    s->stream.next_out = s->outbuf = Z_NULL;
+    s->stream.avail_in = s->stream.avail_out = 0;
+    s->file = NULL;
+    s->z_err = Z_OK;
+    s->z_eof = 0;
+    s->crc = crc32(0L, Z_NULL, 0);
+    s->msg = NULL;
+    s->transparent = 0;
+
+    s->path = (char*)ALLOC(strlen(path)+1);
+    if (s->path == NULL) {
+        return destroy(s), (gzFile)Z_NULL;
+    }
+    strcpy(s->path, path); /* do this early for debugging */
+
+    s->mode = '\0';
+    do {
+        if (*p == 'r') s->mode = 'r';
+        if (*p == 'w' || *p == 'a') s->mode = 'w';
+        if (*p >= '0' && *p <= '9') {
+	    level = *p - '0';
+	} else if (*p == 'f') {
+	  strategy = Z_FILTERED;
+	} else if (*p == 'h') {
+	  strategy = Z_HUFFMAN_ONLY;
+	} else {
+	    *m++ = *p; /* copy the mode */
+	}
+    } while (*p++ && m != fmode + sizeof(fmode));
+    if (s->mode == '\0') return destroy(s), (gzFile)Z_NULL;
+    
+    if (s->mode == 'w') {
+#ifdef NO_DEFLATE
+        err = Z_STREAM_ERROR;
+#else
+        err = deflateInit2(&(s->stream), level,
+                           Z_DEFLATED, -MAX_WBITS, DEF_MEM_LEVEL, strategy);
+        /* windowBits is passed < 0 to suppress zlib header */
+
+        s->stream.next_out = s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
+#endif
+        if (err != Z_OK || s->outbuf == Z_NULL) {
+            return destroy(s), (gzFile)Z_NULL;
+        }
+    } else {
+        s->stream.next_in  = s->inbuf = (Byte*)ALLOC(Z_BUFSIZE);
+
+        err = inflateInit2(&(s->stream), -MAX_WBITS);
+        /* windowBits is passed < 0 to tell that there is no zlib header.
+         * Note that in this case inflate *requires* an extra "dummy" byte
+         * after the compressed stream in order to complete decompression and
+         * return Z_STREAM_END. Here the gzip CRC32 ensures that 4 bytes are
+         * present after the compressed stream.
+         */
+        if (err != Z_OK || s->inbuf == Z_NULL) {
+            return destroy(s), (gzFile)Z_NULL;
+        }
+    }
+    s->stream.avail_out = Z_BUFSIZE;
+
+    errno = 0;
+    s->file = fd < 0 ? F_OPEN(path, fmode) : (FILE*)fdopen(fd, fmode);
+
+    if (s->file == NULL) {
+        return destroy(s), (gzFile)Z_NULL;
+    }
+    if (s->mode == 'w') {
+        /* Write a very simple .gz header:
+         */
+        fprintf(s->file, "%c%c%c%c%c%c%c%c%c%c", gz_magic[0], gz_magic[1],
+             Z_DEFLATED, 0 /*flags*/, 0,0,0,0 /*time*/, 0 /*xflags*/, OS_CODE);
+	s->startpos = 10L;
+	/* We use 10L instead of ftell(s->file) to because ftell causes an
+         * fflush on some systems. This version of the library doesn't use
+         * startpos anyway in write mode, so this initialization is not
+         * necessary.
+         */
+    } else {
+	check_header(s); /* skip the .gz header */
+	s->startpos = (ftell(s->file) - s->stream.avail_in);
+    }
+    
+    return (gzFile)s;
+}
+
+/* ===========================================================================
+     Opens a gzip (.gz) file for reading or writing.
+*/
+gzFile ZEXPORT gzopen (path, mode)
+    const char *path;
+    const char *mode;
+{
+    return gz_open (path, mode, -1);
+}
+
+/* ===========================================================================
+     Associate a gzFile with the file descriptor fd. fd is not dup'ed here
+   to mimic the behavio(u)r of fdopen.
+*/
+gzFile ZEXPORT gzdopen (fd, mode)
+    int fd;
+    const char *mode;
+{
+    char name[20];
+
+    if (fd < 0) return (gzFile)Z_NULL;
+    sprintf(name, "<fd:%d>", fd); /* for debugging */
+
+    return gz_open (name, mode, fd);
+}
+
+/* ===========================================================================
+ * Update the compression level and strategy
+ */
+int ZEXPORT gzsetparams (file, level, strategy)
+    gzFile file;
+    int level;
+    int strategy;
+{
+    gz_stream *s = (gz_stream*)file;
+
+    if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+    /* Make room to allow flushing */
+    if (s->stream.avail_out == 0) {
+
+	s->stream.next_out = s->outbuf;
+	if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
+	    s->z_err = Z_ERRNO;
+	}
+	s->stream.avail_out = Z_BUFSIZE;
+    }
+
+    return deflateParams (&(s->stream), level, strategy);
+}
+
+/* ===========================================================================
+     Read a byte from a gz_stream; update next_in and avail_in. Return EOF
+   for end of file.
+   IN assertion: the stream s has been sucessfully opened for reading.
+*/
+local int get_byte(s)
+    gz_stream *s;
+{
+    if (s->z_eof) return EOF;
+    if (s->stream.avail_in == 0) {
+	errno = 0;
+	s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+	if (s->stream.avail_in == 0) {
+	    s->z_eof = 1;
+	    if (ferror(s->file)) s->z_err = Z_ERRNO;
+	    return EOF;
+	}
+	s->stream.next_in = s->inbuf;
+    }
+    s->stream.avail_in--;
+    return *(s->stream.next_in)++;
+}
+
+/* ===========================================================================
+      Check the gzip header of a gz_stream opened for reading. Set the stream
+    mode to transparent if the gzip magic header is not present; set s->err
+    to Z_DATA_ERROR if the magic header is present but the rest of the header
+    is incorrect.
+    IN assertion: the stream s has already been created sucessfully;
+       s->stream.avail_in is zero for the first time, but may be non-zero
+       for concatenated .gz files.
+*/
+local void check_header(s)
+    gz_stream *s;
+{
+    int method; /* method byte */
+    int flags;  /* flags byte */
+    uInt len;
+    int c;
+
+    /* Check the gzip magic header */
+    for (len = 0; len < 2; len++) {
+	c = get_byte(s);
+	if (c != gz_magic[len]) {
+	    if (len != 0) s->stream.avail_in++, s->stream.next_in--;
+	    if (c != EOF) {
+		s->stream.avail_in++, s->stream.next_in--;
+		s->transparent = 1;
+	    }
+	    s->z_err = s->stream.avail_in != 0 ? Z_OK : Z_STREAM_END;
+	    return;
+	}
+    }
+    method = get_byte(s);
+    flags = get_byte(s);
+    if (method != Z_DEFLATED || (flags & RESERVED) != 0) {
+	s->z_err = Z_DATA_ERROR;
+	return;
+    }
+
+    /* Discard time, xflags and OS code: */
+    for (len = 0; len < 6; len++) (void)get_byte(s);
+
+    if ((flags & EXTRA_FIELD) != 0) { /* skip the extra field */
+	len  =  (uInt)get_byte(s);
+	len += ((uInt)get_byte(s))<<8;
+	/* len is garbage if EOF but the loop below will quit anyway */
+	while (len-- != 0 && get_byte(s) != EOF) ;
+    }
+    if ((flags & ORIG_NAME) != 0) { /* skip the original file name */
+	while ((c = get_byte(s)) != 0 && c != EOF) ;
+    }
+    if ((flags & COMMENT) != 0) {   /* skip the .gz file comment */
+	while ((c = get_byte(s)) != 0 && c != EOF) ;
+    }
+    if ((flags & HEAD_CRC) != 0) {  /* skip the header crc */
+	for (len = 0; len < 2; len++) (void)get_byte(s);
+    }
+    s->z_err = s->z_eof ? Z_DATA_ERROR : Z_OK;
+}
+
+ /* ===========================================================================
+ * Cleanup then free the given gz_stream. Return a zlib error code.
+   Try freeing in the reverse order of allocations.
+ */
+local int destroy (s)
+    gz_stream *s;
+{
+    int err = Z_OK;
+
+    if (!s) return Z_STREAM_ERROR;
+
+    TRYFREE(s->msg);
+
+    if (s->stream.state != NULL) {
+	if (s->mode == 'w') {
+#ifdef NO_DEFLATE
+	    err = Z_STREAM_ERROR;
+#else
+	    err = deflateEnd(&(s->stream));
+#endif
+	} else if (s->mode == 'r') {
+	    err = inflateEnd(&(s->stream));
+	}
+    }
+    if (s->file != NULL && fclose(s->file)) {
+#ifdef ESPIPE
+	if (errno != ESPIPE) /* fclose is broken for pipes in HP/UX */
+#endif
+	    err = Z_ERRNO;
+    }
+    if (s->z_err < 0) err = s->z_err;
+
+    TRYFREE(s->inbuf);
+    TRYFREE(s->outbuf);
+    TRYFREE(s->path);
+    TRYFREE(s);
+    return err;
+}
+
+/* ===========================================================================
+     Reads the given number of uncompressed bytes from the compressed file.
+   gzread returns the number of bytes actually read (0 for end of file).
+*/
+int ZEXPORT gzread (file, buf, len)
+    gzFile file;
+    voidp buf;
+    unsigned len;
+{
+    gz_stream *s = (gz_stream*)file;
+    Bytef *start = (Bytef*)buf; /* starting point for crc computation */
+    Byte  *next_out; /* == stream.next_out but not forced far (for MSDOS) */
+
+    if (s == NULL || s->mode != 'r') return Z_STREAM_ERROR;
+
+    if (s->z_err == Z_DATA_ERROR || s->z_err == Z_ERRNO) return -1;
+    if (s->z_err == Z_STREAM_END) return 0;  /* EOF */
+
+    next_out = (Byte*)buf;
+    s->stream.next_out = (Bytef*)buf;
+    s->stream.avail_out = len;
+
+    while (s->stream.avail_out != 0) {
+
+	if (s->transparent) {
+	    /* Copy first the lookahead bytes: */
+	    uInt n = s->stream.avail_in;
+	    if (n > s->stream.avail_out) n = s->stream.avail_out;
+	    if (n > 0) {
+		zmemcpy(s->stream.next_out, s->stream.next_in, n);
+		next_out += n;
+		s->stream.next_out = next_out;
+		s->stream.next_in   += n;
+		s->stream.avail_out -= n;
+		s->stream.avail_in  -= n;
+	    }
+	    if (s->stream.avail_out > 0) {
+		s->stream.avail_out -= fread(next_out, 1, s->stream.avail_out,
+					     s->file);
+	    }
+	    len -= s->stream.avail_out;
+	    s->stream.total_in  += (uLong)len;
+	    s->stream.total_out += (uLong)len;
+            if (len == 0) s->z_eof = 1;
+	    return (int)len;
+	}
+        if (s->stream.avail_in == 0 && !s->z_eof) {
+
+            errno = 0;
+            s->stream.avail_in = fread(s->inbuf, 1, Z_BUFSIZE, s->file);
+            if (s->stream.avail_in == 0) {
+                s->z_eof = 1;
+		if (ferror(s->file)) {
+		    s->z_err = Z_ERRNO;
+		    break;
+		}
+            }
+            s->stream.next_in = s->inbuf;
+        }
+        s->z_err = inflate(&(s->stream), Z_NO_FLUSH);
+
+	if (s->z_err == Z_STREAM_END) {
+	    /* Check CRC and original size */
+	    s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
+	    start = s->stream.next_out;
+
+	    if (getLong(s) != s->crc) {
+		s->z_err = Z_DATA_ERROR;
+	    } else {
+	        (void)getLong(s);
+                /* The uncompressed length returned by above getlong() may
+                 * be different from s->stream.total_out) in case of
+		 * concatenated .gz files. Check for such files:
+		 */
+		check_header(s);
+		if (s->z_err == Z_OK) {
+		    uLong total_in = s->stream.total_in;
+		    uLong total_out = s->stream.total_out;
+
+		    inflateReset(&(s->stream));
+		    s->stream.total_in = total_in;
+		    s->stream.total_out = total_out;
+		    s->crc = crc32(0L, Z_NULL, 0);
+		}
+	    }
+	}
+	if (s->z_err != Z_OK || s->z_eof) break;
+    }
+    s->crc = crc32(s->crc, start, (uInt)(s->stream.next_out - start));
+
+    return (int)(len - s->stream.avail_out);
+}
+
+
+/* ===========================================================================
+      Reads one byte from the compressed file. gzgetc returns this byte
+   or -1 in case of end of file or error.
+*/
+int ZEXPORT gzgetc(file)
+    gzFile file;
+{
+    unsigned char c;
+
+    return gzread(file, &c, 1) == 1 ? c : -1;
+}
+
+
+/* ===========================================================================
+      Reads bytes from the compressed file until len-1 characters are
+   read, or a newline character is read and transferred to buf, or an
+   end-of-file condition is encountered.  The string is then terminated
+   with a null character.
+      gzgets returns buf, or Z_NULL in case of error.
+
+      The current implementation is not optimized at all.
+*/
+char * ZEXPORT gzgets(file, buf, len)
+    gzFile file;
+    char *buf;
+    int len;
+{
+    char *b = buf;
+    if (buf == Z_NULL || len <= 0) return Z_NULL;
+
+    while (--len > 0 && gzread(file, buf, 1) == 1 && *buf++ != '\n') ;
+    *buf = '\0';
+    return b == buf && len > 0 ? Z_NULL : b;
+}
+
+
+#ifndef NO_DEFLATE
+/* ===========================================================================
+     Writes the given number of uncompressed bytes into the compressed file.
+   gzwrite returns the number of bytes actually written (0 in case of error).
+*/
+int ZEXPORT gzwrite (file, buf, len)
+    gzFile file;
+    const voidp buf;
+    unsigned len;
+{
+    gz_stream *s = (gz_stream*)file;
+
+    if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+    s->stream.next_in = (Bytef*)buf;
+    s->stream.avail_in = len;
+
+    while (s->stream.avail_in != 0) {
+
+        if (s->stream.avail_out == 0) {
+
+            s->stream.next_out = s->outbuf;
+            if (fwrite(s->outbuf, 1, Z_BUFSIZE, s->file) != Z_BUFSIZE) {
+                s->z_err = Z_ERRNO;
+                break;
+            }
+            s->stream.avail_out = Z_BUFSIZE;
+        }
+        s->z_err = deflate(&(s->stream), Z_NO_FLUSH);
+        if (s->z_err != Z_OK) break;
+    }
+    s->crc = crc32(s->crc, (const Bytef *)buf, len);
+
+    return (int)(len - s->stream.avail_in);
+}
+
+/* ===========================================================================
+     Converts, formats, and writes the args to the compressed file under
+   control of the format string, as in fprintf. gzprintf returns the number of
+   uncompressed bytes actually written (0 in case of error).
+*/
+#ifdef STDC
+#include <stdarg.h>
+
+int ZEXPORTVA gzprintf (gzFile file, const char *format, /* args */ ...)
+{
+    char buf[Z_PRINTF_BUFSIZE];
+    va_list va;
+    int len;
+
+    va_start(va, format);
+#ifdef HAS_vsnprintf
+    (void)vsnprintf(buf, sizeof(buf), format, va);
+#else
+    (void)vsprintf(buf, format, va);
+#endif
+    va_end(va);
+    len = strlen(buf); /* some *sprintf don't return the nb of bytes written */
+    if (len <= 0) return 0;
+
+    return gzwrite(file, buf, (unsigned)len);
+}
+#else /* not ANSI C */
+
+int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
+	               a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)
+    gzFile file;
+    const char *format;
+    int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
+	a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
+{
+    char buf[Z_PRINTF_BUFSIZE];
+    int len;
+
+#ifdef HAS_snprintf
+    snprintf(buf, sizeof(buf), format, a1, a2, a3, a4, a5, a6, a7, a8,
+	     a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+#else
+    sprintf(buf, format, a1, a2, a3, a4, a5, a6, a7, a8,
+	    a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+#endif
+    len = strlen(buf); /* old sprintf doesn't return the nb of bytes written */
+    if (len <= 0) return 0;
+
+    return gzwrite(file, buf, len);
+}
+#endif
+
+/* ===========================================================================
+      Writes c, converted to an unsigned char, into the compressed file.
+   gzputc returns the value that was written, or -1 in case of error.
+*/
+int ZEXPORT gzputc(file, c)
+    gzFile file;
+    int c;
+{
+    unsigned char cc = (unsigned char) c; /* required for big endian systems */
+
+    return gzwrite(file, &cc, 1) == 1 ? (int)cc : -1;
+}
+
+
+/* ===========================================================================
+      Writes the given null-terminated string to the compressed file, excluding
+   the terminating null character.
+      gzputs returns the number of characters written, or -1 in case of error.
+*/
+int ZEXPORT gzputs(file, s)
+    gzFile file;
+    const char *s;
+{
+    return gzwrite(file, (char*)s, (unsigned)strlen(s));
+}
+
+
+/* ===========================================================================
+     Flushes all pending output into the compressed file. The parameter
+   flush is as in the deflate() function.
+*/
+local int do_flush (file, flush)
+    gzFile file;
+    int flush;
+{
+    uInt len;
+    int done = 0;
+    gz_stream *s = (gz_stream*)file;
+
+    if (s == NULL || s->mode != 'w') return Z_STREAM_ERROR;
+
+    s->stream.avail_in = 0; /* should be zero already anyway */
+
+    for (;;) {
+        len = Z_BUFSIZE - s->stream.avail_out;
+
+        if (len != 0) {
+            if ((uInt)fwrite(s->outbuf, 1, len, s->file) != len) {
+                s->z_err = Z_ERRNO;
+                return Z_ERRNO;
+            }
+            s->stream.next_out = s->outbuf;
+            s->stream.avail_out = Z_BUFSIZE;
+        }
+        if (done) break;
+        s->z_err = deflate(&(s->stream), flush);
+
+	/* Ignore the second of two consecutive flushes: */
+	if (len == 0 && s->z_err == Z_BUF_ERROR) s->z_err = Z_OK;
+
+        /* deflate has finished flushing only when it hasn't used up
+         * all the available space in the output buffer: 
+         */
+        done = (s->stream.avail_out != 0 || s->z_err == Z_STREAM_END);
+ 
+        if (s->z_err != Z_OK && s->z_err != Z_STREAM_END) break;
+    }
+    return  s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
+}
+
+int ZEXPORT gzflush (file, flush)
+     gzFile file;
+     int flush;
+{
+    gz_stream *s = (gz_stream*)file;
+    int err = do_flush (file, flush);
+
+    if (err) return err;
+    fflush(s->file);
+    return  s->z_err == Z_STREAM_END ? Z_OK : s->z_err;
+}
+#endif /* NO_DEFLATE */
+
+/* ===========================================================================
+      Sets the starting position for the next gzread or gzwrite on the given
+   compressed file. The offset represents a number of bytes in the
+      gzseek returns the resulting offset location as measured in bytes from
+   the beginning of the uncompressed stream, or -1 in case of error.
+      SEEK_END is not implemented, returns error.
+      In this version of the library, gzseek can be extremely slow.
+*/
+z_off_t ZEXPORT gzseek (file, offset, whence)
+    gzFile file;
+    z_off_t offset;
+    int whence;
+{
+    gz_stream *s = (gz_stream*)file;
+
+    if (s == NULL || whence == SEEK_END ||
+	s->z_err == Z_ERRNO || s->z_err == Z_DATA_ERROR) {
+	return -1L;
+    }
+    
+    if (s->mode == 'w') {
+#ifdef NO_DEFLATE
+	return -1L;
+#else
+	if (whence == SEEK_SET) {
+	    offset -= s->stream.total_in;
+	}
+	if (offset < 0) return -1L;
+
+	/* At this point, offset is the number of zero bytes to write. */
+	if (s->inbuf == Z_NULL) {
+	    s->inbuf = (Byte*)ALLOC(Z_BUFSIZE); /* for seeking */
+	    zmemzero(s->inbuf, Z_BUFSIZE);
+	}
+	while (offset > 0)  {
+	    uInt size = Z_BUFSIZE;
+	    if (offset < Z_BUFSIZE) size = (uInt)offset;
+
+	    size = gzwrite(file, s->inbuf, size);
+	    if (size == 0) return -1L;
+
+	    offset -= size;
+	}
+	return (z_off_t)s->stream.total_in;
+#endif
+    }
+    /* Rest of function is for reading only */
+
+    /* compute absolute position */
+    if (whence == SEEK_CUR) {
+	offset += s->stream.total_out;
+    }
+    if (offset < 0) return -1L;
+
+    if (s->transparent) {
+	/* map to fseek */
+	s->stream.avail_in = 0;
+	s->stream.next_in = s->inbuf;
+        if (fseek(s->file, offset, SEEK_SET) < 0) return -1L;
+
+	s->stream.total_in = s->stream.total_out = (uLong)offset;
+	return offset;
+    }
+
+    /* For a negative seek, rewind and use positive seek */
+    if ((uLong)offset >= s->stream.total_out) {
+	offset -= s->stream.total_out;
+    } else if (gzrewind(file) < 0) {
+	return -1L;
+    }
+    /* offset is now the number of bytes to skip. */
+
+    if (offset != 0 && s->outbuf == Z_NULL) {
+	s->outbuf = (Byte*)ALLOC(Z_BUFSIZE);
+    }
+    while (offset > 0)  {
+	int size = Z_BUFSIZE;
+	if (offset < Z_BUFSIZE) size = (int)offset;
+
+	size = gzread(file, s->outbuf, (uInt)size);
+	if (size <= 0) return -1L;
+	offset -= size;
+    }
+    return (z_off_t)s->stream.total_out;
+}
+
+/* ===========================================================================
+     Rewinds input file. 
+*/
+int ZEXPORT gzrewind (file)
+    gzFile file;
+{
+    gz_stream *s = (gz_stream*)file;
+    
+    if (s == NULL || s->mode != 'r') return -1;
+
+    s->z_err = Z_OK;
+    s->z_eof = 0;
+    s->stream.avail_in = 0;
+    s->stream.next_in = s->inbuf;
+    s->crc = crc32(0L, Z_NULL, 0);
+	
+    if (s->startpos == 0) { /* not a compressed file */
+	rewind(s->file);
+	return 0;
+    }
+
+    (void) inflateReset(&s->stream);
+    return fseek(s->file, s->startpos, SEEK_SET);
+}
+
+/* ===========================================================================
+     Returns the starting position for the next gzread or gzwrite on the
+   given compressed file. This position represents a number of bytes in the
+   uncompressed data stream.
+*/
+z_off_t ZEXPORT gztell (file)
+    gzFile file;
+{
+    return gzseek(file, 0L, SEEK_CUR);
+}
+
+/* ===========================================================================
+     Returns 1 when EOF has previously been detected reading the given
+   input stream, otherwise zero.
+*/
+int ZEXPORT gzeof (file)
+    gzFile file;
+{
+    gz_stream *s = (gz_stream*)file;
+    
+    return (s == NULL || s->mode != 'r') ? 0 : s->z_eof;
+}
+
+/* ===========================================================================
+   Outputs a long in LSB order to the given file
+*/
+local void putLong (file, x)
+    FILE *file;
+    uLong x;
+{
+    int n;
+    for (n = 0; n < 4; n++) {
+        fputc((int)(x & 0xff), file);
+        x >>= 8;
+    }
+}
+
+/* ===========================================================================
+   Reads a long in LSB order from the given gz_stream. Sets z_err in case
+   of error.
+*/
+local uLong getLong (s)
+    gz_stream *s;
+{
+    uLong x = (uLong)get_byte(s);
+    int c;
+
+    x += ((uLong)get_byte(s))<<8;
+    x += ((uLong)get_byte(s))<<16;
+    c = get_byte(s);
+    if (c == EOF) s->z_err = Z_DATA_ERROR;
+    x += ((uLong)c)<<24;
+    return x;
+}
+
+/* ===========================================================================
+     Flushes all pending output if necessary, closes the compressed file
+   and deallocates all the (de)compression state.
+*/
+int ZEXPORT gzclose (file)
+    gzFile file;
+{
+    int err;
+    gz_stream *s = (gz_stream*)file;
+
+    if (s == NULL) return Z_STREAM_ERROR;
+
+    if (s->mode == 'w') {
+#ifdef NO_DEFLATE
+	return Z_STREAM_ERROR;
+#else
+        err = do_flush (file, Z_FINISH);
+        if (err != Z_OK) return destroy((gz_stream*)file);
+
+        putLong (s->file, s->crc);
+        putLong (s->file, s->stream.total_in);
+#endif
+    }
+    return destroy((gz_stream*)file);
+}
+
+/* ===========================================================================
+     Returns the error message for the last error which occured on the
+   given compressed file. errnum is set to zlib error number. If an
+   error occured in the file system and not in the compression library,
+   errnum is set to Z_ERRNO and the application may consult errno
+   to get the exact error code.
+*/
+const char*  ZEXPORT gzerror (file, errnum)
+    gzFile file;
+    int *errnum;
+{
+    char *m;
+    gz_stream *s = (gz_stream*)file;
+
+    if (s == NULL) {
+        *errnum = Z_STREAM_ERROR;
+        return (const char*)ERR_MSG(Z_STREAM_ERROR);
+    }
+    *errnum = s->z_err;
+    if (*errnum == Z_OK) return (const char*)"";
+
+    m =  (char*)(*errnum == Z_ERRNO ? zstrerror(errno) : s->stream.msg);
+
+    if (m == NULL || *m == '\0') m = (char*)ERR_MSG(s->z_err);
+
+    TRYFREE(s->msg);
+    s->msg = (char*)ALLOC(strlen(s->path) + strlen(m) + 3);
+    strcpy(s->msg, s->path);
+    strcat(s->msg, ": ");
+    strcat(s->msg, m);
+    return (const char*)s->msg;
+}
diff --git a/common/zlib/infblock.c b/common/zlib/infblock.c
new file mode 100644
index 00000000..dd7a6d40
--- /dev/null
+++ b/common/zlib/infblock.c
@@ -0,0 +1,403 @@
+/* infblock.c -- interpret and process block types to last block
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+#include "zutil.h"
+#include "infblock.h"
+#include "inftrees.h"
+#include "infcodes.h"
+#include "infutil.h"
+
+struct inflate_codes_state {int dummy;}; /* for buggy compilers */
+
+/* simplify the use of the inflate_huft type with some defines */
+#define exop word.what.Exop
+#define bits word.what.Bits
+
+/* Table for deflate from PKZIP's appnote.txt. */
+local const uInt border[] = { /* Order of the bit length code lengths */
+        16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
+
+/*
+   Notes beyond the 1.93a appnote.txt:
+
+   1. Distance pointers never point before the beginning of the output
+      stream.
+   2. Distance pointers can point back across blocks, up to 32k away.
+   3. There is an implied maximum of 7 bits for the bit length table and
+      15 bits for the actual data.
+   4. If only one code exists, then it is encoded using one bit.  (Zero
+      would be more efficient, but perhaps a little confusing.)  If two
+      codes exist, they are coded using one bit each (0 and 1).
+   5. There is no way of sending zero distance codes--a dummy must be
+      sent if there are none.  (History: a pre 2.0 version of PKZIP would
+      store blocks with no distance codes, but this was discovered to be
+      too harsh a criterion.)  Valid only for 1.93a.  2.04c does allow
+      zero distance codes, which is sent as one code of zero bits in
+      length.
+   6. There are up to 286 literal/length codes.  Code 256 represents the
+      end-of-block.  Note however that the static length tree defines
+      288 codes just to fill out the Huffman codes.  Codes 286 and 287
+      cannot be used though, since there is no length base or extra bits
+      defined for them.  Similarily, there are up to 30 distance codes.
+      However, static trees define 32 codes (all 5 bits) to fill out the
+      Huffman codes, but the last two had better not show up in the data.
+   7. Unzip can check dynamic Huffman blocks for complete code sets.
+      The exception is that a single code would not be complete (see #4).
+   8. The five bits following the block type is really the number of
+      literal codes sent minus 257.
+   9. Length codes 8,16,16 are interpreted as 13 length codes of 8 bits
+      (1+6+6).  Therefore, to output three times the length, you output
+      three codes (1+1+1), whereas to output four times the same length,
+      you only need two codes (1+3).  Hmm.
+  10. In the tree reconstruction algorithm, Code = Code + Increment
+      only if BitLength(i) is not zero.  (Pretty obvious.)
+  11. Correction: 4 Bits: # of Bit Length codes - 4     (4 - 19)
+  12. Note: length code 284 can represent 227-258, but length code 285
+      really is 258.  The last length deserves its own, short code
+      since it gets used a lot in very redundant files.  The length
+      258 is special since 258 - 3 (the min match length) is 255.
+  13. The literal/length and distance code bit lengths are read as a
+      single stream of lengths.  It is possible (and advantageous) for
+      a repeat code (16, 17, or 18) to go across the boundary between
+      the two sets of lengths.
+ */
+
+
+void inflate_blocks_reset(s, z, c)
+inflate_blocks_statef *s;
+z_streamp z;
+uLongf *c;
+{
+  if (c != Z_NULL)
+    *c = s->check;
+  if (s->mode == BTREE || s->mode == DTREE)
+    ZFREE(z, s->sub.trees.blens);
+  if (s->mode == CODES)
+    inflate_codes_free(s->sub.decode.codes, z);
+  s->mode = TYPE;
+  s->bitk = 0;
+  s->bitb = 0;
+  s->read = s->write = s->window;
+  if (s->checkfn != Z_NULL)
+    z->adler = s->check = (*s->checkfn)(0L, (const Bytef *)Z_NULL, 0);
+  Tracev((stderr, "inflate:   blocks reset\n"));
+}
+
+
+inflate_blocks_statef *inflate_blocks_new(z, c, w)
+z_streamp z;
+check_func c;
+uInt w;
+{
+  inflate_blocks_statef *s;
+
+  if ((s = (inflate_blocks_statef *)ZALLOC
+       (z,1,sizeof(struct inflate_blocks_state))) == Z_NULL)
+    return s;
+  if ((s->hufts =
+       (inflate_huft *)ZALLOC(z, sizeof(inflate_huft), MANY)) == Z_NULL)
+  {
+    ZFREE(z, s);
+    return Z_NULL;
+  }
+  if ((s->window = (Bytef *)ZALLOC(z, 1, w)) == Z_NULL)
+  {
+    ZFREE(z, s->hufts);
+    ZFREE(z, s);
+    return Z_NULL;
+  }
+  s->end = s->window + w;
+  s->checkfn = c;
+  s->mode = TYPE;
+  Tracev((stderr, "inflate:   blocks allocated\n"));
+  inflate_blocks_reset(s, z, Z_NULL);
+  return s;
+}
+
+
+int inflate_blocks(s, z, r)
+inflate_blocks_statef *s;
+z_streamp z;
+int r;
+{
+  uInt t;               /* temporary storage */
+  uLong b;              /* bit buffer */
+  uInt k;               /* bits in bit buffer */
+  Bytef *p;             /* input data pointer */
+  uInt n;               /* bytes available there */
+  Bytef *q;             /* output window write pointer */
+  uInt m;               /* bytes to end of window or read pointer */
+
+  /* copy input/output information to locals (UPDATE macro restores) */
+  LOAD
+
+  /* process input based on current state */
+  while (1) switch (s->mode)
+  {
+    case TYPE:
+      NEEDBITS(3)
+      t = (uInt)b & 7;
+      s->last = t & 1;
+      switch (t >> 1)
+      {
+        case 0:                         /* stored */
+          Tracev((stderr, "inflate:     stored block%s\n",
+                 s->last ? " (last)" : ""));
+          DUMPBITS(3)
+          t = k & 7;                    /* go to byte boundary */
+          DUMPBITS(t)
+          s->mode = LENS;               /* get length of stored block */
+          break;
+        case 1:                         /* fixed */
+          Tracev((stderr, "inflate:     fixed codes block%s\n",
+                 s->last ? " (last)" : ""));
+          {
+            uInt bl, bd;
+            inflate_huft *tl, *td;
+
+            inflate_trees_fixed(&bl, &bd, &tl, &td, z);
+            s->sub.decode.codes = inflate_codes_new(bl, bd, tl, td, z);
+            if (s->sub.decode.codes == Z_NULL)
+            {
+              r = Z_MEM_ERROR;
+              LEAVE
+            }
+          }
+          DUMPBITS(3)
+          s->mode = CODES;
+          break;
+        case 2:                         /* dynamic */
+          Tracev((stderr, "inflate:     dynamic codes block%s\n",
+                 s->last ? " (last)" : ""));
+          DUMPBITS(3)
+          s->mode = TABLE;
+          break;
+        case 3:                         /* illegal */
+          DUMPBITS(3)
+          s->mode = BAD;
+          z->msg = (char*)"invalid block type";
+          r = Z_DATA_ERROR;
+          LEAVE
+      }
+      break;
+    case LENS:
+      NEEDBITS(32)
+      if ((((~b) >> 16) & 0xffff) != (b & 0xffff))
+      {
+        s->mode = BAD;
+        z->msg = (char*)"invalid stored block lengths";
+        r = Z_DATA_ERROR;
+        LEAVE
+      }
+      s->sub.left = (uInt)b & 0xffff;
+      b = k = 0;                      /* dump bits */
+      Tracev((stderr, "inflate:       stored length %u\n", s->sub.left));
+      s->mode = s->sub.left ? STORED : (s->last ? DRY : TYPE);
+      break;
+    case STORED:
+      if (n == 0)
+        LEAVE
+      NEEDOUT
+      t = s->sub.left;
+      if (t > n) t = n;
+      if (t > m) t = m;
+      zmemcpy(q, p, t);
+      p += t;  n -= t;
+      q += t;  m -= t;
+      if ((s->sub.left -= t) != 0)
+        break;
+      Tracev((stderr, "inflate:       stored end, %lu total out\n",
+              z->total_out + (q >= s->read ? q - s->read :
+              (s->end - s->read) + (q - s->window))));
+      s->mode = s->last ? DRY : TYPE;
+      break;
+    case TABLE:
+      NEEDBITS(14)
+      s->sub.trees.table = t = (uInt)b & 0x3fff;
+#ifndef PKZIP_BUG_WORKAROUND
+      if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29)
+      {
+        s->mode = BAD;
+        z->msg = (char*)"too many length or distance symbols";
+        r = Z_DATA_ERROR;
+        LEAVE
+      }
+#endif
+      t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
+      if ((s->sub.trees.blens = (uIntf*)ZALLOC(z, t, sizeof(uInt))) == Z_NULL)
+      {
+        r = Z_MEM_ERROR;
+        LEAVE
+      }
+      DUMPBITS(14)
+      s->sub.trees.index = 0;
+      Tracev((stderr, "inflate:       table sizes ok\n"));
+      s->mode = BTREE;
+    case BTREE:
+      while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
+      {
+        NEEDBITS(3)
+        s->sub.trees.blens[border[s->sub.trees.index++]] = (uInt)b & 7;
+        DUMPBITS(3)
+      }
+      while (s->sub.trees.index < 19)
+        s->sub.trees.blens[border[s->sub.trees.index++]] = 0;
+      s->sub.trees.bb = 7;
+      t = inflate_trees_bits(s->sub.trees.blens, &s->sub.trees.bb,
+                             &s->sub.trees.tb, s->hufts, z);
+      if (t != Z_OK)
+      {
+        r = t;
+        if (r == Z_DATA_ERROR)
+        {
+          ZFREE(z, s->sub.trees.blens);
+          s->mode = BAD;
+        }
+        LEAVE
+      }
+      s->sub.trees.index = 0;
+      Tracev((stderr, "inflate:       bits tree ok\n"));
+      s->mode = DTREE;
+    case DTREE:
+      while (t = s->sub.trees.table,
+             s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
+      {
+        inflate_huft *h;
+        uInt i, j, c;
+
+        t = s->sub.trees.bb;
+        NEEDBITS(t)
+        h = s->sub.trees.tb + ((uInt)b & inflate_mask[t]);
+        t = h->bits;
+        c = h->base;
+        if (c < 16)
+        {
+          DUMPBITS(t)
+          s->sub.trees.blens[s->sub.trees.index++] = c;
+        }
+        else /* c == 16..18 */
+        {
+          i = c == 18 ? 7 : c - 14;
+          j = c == 18 ? 11 : 3;
+          NEEDBITS(t + i)
+          DUMPBITS(t)
+          j += (uInt)b & inflate_mask[i];
+          DUMPBITS(i)
+          i = s->sub.trees.index;
+          t = s->sub.trees.table;
+          if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
+              (c == 16 && i < 1))
+          {
+            ZFREE(z, s->sub.trees.blens);
+            s->mode = BAD;
+            z->msg = (char*)"invalid bit length repeat";
+            r = Z_DATA_ERROR;
+            LEAVE
+          }
+          c = c == 16 ? s->sub.trees.blens[i - 1] : 0;
+          do {
+            s->sub.trees.blens[i++] = c;
+          } while (--j);
+          s->sub.trees.index = i;
+        }
+      }
+      s->sub.trees.tb = Z_NULL;
+      {
+        uInt bl, bd;
+        inflate_huft *tl, *td;
+        inflate_codes_statef *c;
+
+        bl = 9;         /* must be <= 9 for lookahead assumptions */
+        bd = 6;         /* must be <= 9 for lookahead assumptions */
+        t = s->sub.trees.table;
+        t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
+                                  s->sub.trees.blens, &bl, &bd, &tl, &td,
+                                  s->hufts, z);
+        if (t != Z_OK)
+        {
+          if (t == (uInt)Z_DATA_ERROR)
+          {
+            ZFREE(z, s->sub.trees.blens);
+            s->mode = BAD;
+          }
+          r = t;
+          LEAVE
+        }
+        Tracev((stderr, "inflate:       trees ok\n"));
+        if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
+        {
+          r = Z_MEM_ERROR;
+          LEAVE
+        }
+        s->sub.decode.codes = c;
+      }
+      ZFREE(z, s->sub.trees.blens);
+      s->mode = CODES;
+    case CODES:
+      UPDATE
+      if ((r = inflate_codes(s, z, r)) != Z_STREAM_END)
+        return inflate_flush(s, z, r);
+      r = Z_OK;
+      inflate_codes_free(s->sub.decode.codes, z);
+      LOAD
+      Tracev((stderr, "inflate:       codes end, %lu total out\n",
+              z->total_out + (q >= s->read ? q - s->read :
+              (s->end - s->read) + (q - s->window))));
+      if (!s->last)
+      {
+        s->mode = TYPE;
+        break;
+      }
+      s->mode = DRY;
+    case DRY:
+      FLUSH
+      if (s->read != s->write)
+        LEAVE
+      s->mode = DONE;
+    case DONE:
+      r = Z_STREAM_END;
+      LEAVE
+    case BAD:
+      r = Z_DATA_ERROR;
+      LEAVE
+    default:
+      r = Z_STREAM_ERROR;
+      LEAVE
+  }
+}
+
+
+int inflate_blocks_free(s, z)
+inflate_blocks_statef *s;
+z_streamp z;
+{
+  inflate_blocks_reset(s, z, Z_NULL);
+  ZFREE(z, s->window);
+  ZFREE(z, s->hufts);
+  ZFREE(z, s);
+  Tracev((stderr, "inflate:   blocks freed\n"));
+  return Z_OK;
+}
+
+
+void inflate_set_dictionary(s, d, n)
+inflate_blocks_statef *s;
+const Bytef *d;
+uInt  n;
+{
+  zmemcpy(s->window, d, n);
+  s->read = s->write = s->window + n;
+}
+
+
+/* Returns true if inflate is currently at the end of a block generated
+ * by Z_SYNC_FLUSH or Z_FULL_FLUSH. 
+ * IN assertion: s != Z_NULL
+ */
+int inflate_blocks_sync_point(s)
+inflate_blocks_statef *s;
+{
+  return s->mode == LENS;
+}
diff --git a/common/zlib/infblock.h b/common/zlib/infblock.h
new file mode 100644
index 00000000..173b2267
--- /dev/null
+++ b/common/zlib/infblock.h
@@ -0,0 +1,39 @@
+/* infblock.h -- header to use infblock.c
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+struct inflate_blocks_state;
+typedef struct inflate_blocks_state FAR inflate_blocks_statef;
+
+extern inflate_blocks_statef * inflate_blocks_new OF((
+    z_streamp z,
+    check_func c,               /* check function */
+    uInt w));                   /* window size */
+
+extern int inflate_blocks OF((
+    inflate_blocks_statef *,
+    z_streamp ,
+    int));                      /* initial return code */
+
+extern void inflate_blocks_reset OF((
+    inflate_blocks_statef *,
+    z_streamp ,
+    uLongf *));                  /* check value on output */
+
+extern int inflate_blocks_free OF((
+    inflate_blocks_statef *,
+    z_streamp));
+
+extern void inflate_set_dictionary OF((
+    inflate_blocks_statef *s,
+    const Bytef *d,  /* dictionary */
+    uInt  n));       /* dictionary length */
+
+extern int inflate_blocks_sync_point OF((
+    inflate_blocks_statef *s));
diff --git a/common/zlib/infcodes.c b/common/zlib/infcodes.c
new file mode 100644
index 00000000..9abe5412
--- /dev/null
+++ b/common/zlib/infcodes.c
@@ -0,0 +1,251 @@
+/* infcodes.c -- process literals and length/distance pairs
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "infblock.h"
+#include "infcodes.h"
+#include "infutil.h"
+#include "inffast.h"
+
+/* simplify the use of the inflate_huft type with some defines */
+#define exop word.what.Exop
+#define bits word.what.Bits
+
+typedef enum {        /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
+      START,    /* x: set up for LEN */
+      LEN,      /* i: get length/literal/eob next */
+      LENEXT,   /* i: getting length extra (have base) */
+      DIST,     /* i: get distance next */
+      DISTEXT,  /* i: getting distance extra */
+      COPY,     /* o: copying bytes in window, waiting for space */
+      LIT,      /* o: got literal, waiting for output space */
+      WASH,     /* o: got eob, possibly still output waiting */
+      END,      /* x: got eob and all data flushed */
+      BADCODE}  /* x: got error */
+inflate_codes_mode;
+
+/* inflate codes private state */
+struct inflate_codes_state {
+
+  /* mode */
+  inflate_codes_mode mode;      /* current inflate_codes mode */
+
+  /* mode dependent information */
+  uInt len;
+  union {
+    struct {
+      inflate_huft *tree;       /* pointer into tree */
+      uInt need;                /* bits needed */
+    } code;             /* if LEN or DIST, where in tree */
+    uInt lit;           /* if LIT, literal */
+    struct {
+      uInt get;                 /* bits to get for extra */
+      uInt dist;                /* distance back to copy from */
+    } copy;             /* if EXT or COPY, where and how much */
+  } sub;                /* submode */
+
+  /* mode independent information */
+  Byte lbits;           /* ltree bits decoded per branch */
+  Byte dbits;           /* dtree bits decoder per branch */
+  inflate_huft *ltree;          /* literal/length/eob tree */
+  inflate_huft *dtree;          /* distance tree */
+
+};
+
+
+inflate_codes_statef *inflate_codes_new(bl, bd, tl, td, z)
+uInt bl, bd;
+inflate_huft *tl;
+inflate_huft *td; /* need separate declaration for Borland C++ */
+z_streamp z;
+{
+  inflate_codes_statef *c;
+
+  if ((c = (inflate_codes_statef *)
+       ZALLOC(z,1,sizeof(struct inflate_codes_state))) != Z_NULL)
+  {
+    c->mode = START;
+    c->lbits = (Byte)bl;
+    c->dbits = (Byte)bd;
+    c->ltree = tl;
+    c->dtree = td;
+    Tracev((stderr, "inflate:       codes new\n"));
+  }
+  return c;
+}
+
+
+int inflate_codes(s, z, r)
+inflate_blocks_statef *s;
+z_streamp z;
+int r;
+{
+  uInt j;               /* temporary storage */
+  inflate_huft *t;      /* temporary pointer */
+  uInt e;               /* extra bits or operation */
+  uLong b;              /* bit buffer */
+  uInt k;               /* bits in bit buffer */
+  Bytef *p;             /* input data pointer */
+  uInt n;               /* bytes available there */
+  Bytef *q;             /* output window write pointer */
+  uInt m;               /* bytes to end of window or read pointer */
+  Bytef *f;             /* pointer to copy strings from */
+  inflate_codes_statef *c = s->sub.decode.codes;  /* codes state */
+
+  /* copy input/output information to locals (UPDATE macro restores) */
+  LOAD
+
+  /* process input and output based on current state */
+  while (1) switch (c->mode)
+  {             /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
+    case START:         /* x: set up for LEN */
+#ifndef SLOW
+      if (m >= 258 && n >= 10)
+      {
+        UPDATE
+        r = inflate_fast(c->lbits, c->dbits, c->ltree, c->dtree, s, z);
+        LOAD
+        if (r != Z_OK)
+        {
+          c->mode = r == Z_STREAM_END ? WASH : BADCODE;
+          break;
+        }
+      }
+#endif /* !SLOW */
+      c->sub.code.need = c->lbits;
+      c->sub.code.tree = c->ltree;
+      c->mode = LEN;
+    case LEN:           /* i: get length/literal/eob next */
+      j = c->sub.code.need;
+      NEEDBITS(j)
+      t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
+      DUMPBITS(t->bits)
+      e = (uInt)(t->exop);
+      if (e == 0)               /* literal */
+      {
+        c->sub.lit = t->base;
+        Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
+                 "inflate:         literal '%c'\n" :
+                 "inflate:         literal 0x%02x\n", t->base));
+        c->mode = LIT;
+        break;
+      }
+      if (e & 16)               /* length */
+      {
+        c->sub.copy.get = e & 15;
+        c->len = t->base;
+        c->mode = LENEXT;
+        break;
+      }
+      if ((e & 64) == 0)        /* next table */
+      {
+        c->sub.code.need = e;
+        c->sub.code.tree = t + t->base;
+        break;
+      }
+      if (e & 32)               /* end of block */
+      {
+        Tracevv((stderr, "inflate:         end of block\n"));
+        c->mode = WASH;
+        break;
+      }
+      c->mode = BADCODE;        /* invalid code */
+      z->msg = (char*)"invalid literal/length code";
+      r = Z_DATA_ERROR;
+      LEAVE
+    case LENEXT:        /* i: getting length extra (have base) */
+      j = c->sub.copy.get;
+      NEEDBITS(j)
+      c->len += (uInt)b & inflate_mask[j];
+      DUMPBITS(j)
+      c->sub.code.need = c->dbits;
+      c->sub.code.tree = c->dtree;
+      Tracevv((stderr, "inflate:         length %u\n", c->len));
+      c->mode = DIST;
+    case DIST:          /* i: get distance next */
+      j = c->sub.code.need;
+      NEEDBITS(j)
+      t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
+      DUMPBITS(t->bits)
+      e = (uInt)(t->exop);
+      if (e & 16)               /* distance */
+      {
+        c->sub.copy.get = e & 15;
+        c->sub.copy.dist = t->base;
+        c->mode = DISTEXT;
+        break;
+      }
+      if ((e & 64) == 0)        /* next table */
+      {
+        c->sub.code.need = e;
+        c->sub.code.tree = t + t->base;
+        break;
+      }
+      c->mode = BADCODE;        /* invalid code */
+      z->msg = (char*)"invalid distance code";
+      r = Z_DATA_ERROR;
+      LEAVE
+    case DISTEXT:       /* i: getting distance extra */
+      j = c->sub.copy.get;
+      NEEDBITS(j)
+      c->sub.copy.dist += (uInt)b & inflate_mask[j];
+      DUMPBITS(j)
+      Tracevv((stderr, "inflate:         distance %u\n", c->sub.copy.dist));
+      c->mode = COPY;
+    case COPY:          /* o: copying bytes in window, waiting for space */
+      f = q - c->sub.copy.dist;
+      while (f < s->window)             /* modulo window size-"while" instead */
+        f += s->end - s->window;        /* of "if" handles invalid distances */
+      while (c->len)
+      {
+        NEEDOUT
+        OUTBYTE(*f++)
+        if (f == s->end)
+          f = s->window;
+        c->len--;
+      }
+      c->mode = START;
+      break;
+    case LIT:           /* o: got literal, waiting for output space */
+      NEEDOUT
+      OUTBYTE(c->sub.lit)
+      c->mode = START;
+      break;
+    case WASH:          /* o: got eob, possibly more output */
+      if (k > 7)        /* return unused byte, if any */
+      {
+        Assert(k < 16, "inflate_codes grabbed too many bytes")
+        k -= 8;
+        n++;
+        p--;            /* can always return one */
+      }
+      FLUSH
+      if (s->read != s->write)
+        LEAVE
+      c->mode = END;
+    case END:
+      r = Z_STREAM_END;
+      LEAVE
+    case BADCODE:       /* x: got error */
+      r = Z_DATA_ERROR;
+      LEAVE
+    default:
+      r = Z_STREAM_ERROR;
+      LEAVE
+  }
+#ifdef NEED_DUMMY_RETURN
+  return Z_STREAM_ERROR;  /* Some dumb compilers complain without this */
+#endif
+}
+
+
+void inflate_codes_free(c, z)
+inflate_codes_statef *c;
+z_streamp z;
+{
+  ZFREE(z, c);
+  Tracev((stderr, "inflate:       codes free\n"));
+}
diff --git a/common/zlib/infcodes.h b/common/zlib/infcodes.h
new file mode 100644
index 00000000..46821a02
--- /dev/null
+++ b/common/zlib/infcodes.h
@@ -0,0 +1,27 @@
+/* infcodes.h -- header to use infcodes.c
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+struct inflate_codes_state;
+typedef struct inflate_codes_state FAR inflate_codes_statef;
+
+extern inflate_codes_statef *inflate_codes_new OF((
+    uInt, uInt,
+    inflate_huft *, inflate_huft *,
+    z_streamp ));
+
+extern int inflate_codes OF((
+    inflate_blocks_statef *,
+    z_streamp ,
+    int));
+
+extern void inflate_codes_free OF((
+    inflate_codes_statef *,
+    z_streamp ));
+
diff --git a/common/zlib/inffast.c b/common/zlib/inffast.c
new file mode 100644
index 00000000..aa7f1d4d
--- /dev/null
+++ b/common/zlib/inffast.c
@@ -0,0 +1,183 @@
+/* inffast.c -- process literals and length/distance pairs fast
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+#include "infblock.h"
+#include "infcodes.h"
+#include "infutil.h"
+#include "inffast.h"
+
+struct inflate_codes_state {int dummy;}; /* for buggy compilers */
+
+/* simplify the use of the inflate_huft type with some defines */
+#define exop word.what.Exop
+#define bits word.what.Bits
+
+/* macros for bit input with no checking and for returning unused bytes */
+#define GRABBITS(j) {while(k<(j)){b|=((uLong)NEXTBYTE)<<k;k+=8;}}
+#define UNGRAB {c=z->avail_in-n;c=(k>>3)<c?k>>3:c;n+=c;p-=c;k-=c<<3;}
+
+/* Called with number of bytes left to write in window at least 258
+   (the maximum string length) and number of input bytes available
+   at least ten.  The ten bytes are six bytes for the longest length/
+   distance pair plus four bytes for overloading the bit buffer. */
+
+int inflate_fast(bl, bd, tl, td, s, z)
+uInt bl, bd;
+inflate_huft *tl;
+inflate_huft *td; /* need separate declaration for Borland C++ */
+inflate_blocks_statef *s;
+z_streamp z;
+{
+  inflate_huft *t;      /* temporary pointer */
+  uInt e;               /* extra bits or operation */
+  uLong b;              /* bit buffer */
+  uInt k;               /* bits in bit buffer */
+  Bytef *p;             /* input data pointer */
+  uInt n;               /* bytes available there */
+  Bytef *q;             /* output window write pointer */
+  uInt m;               /* bytes to end of window or read pointer */
+  uInt ml;              /* mask for literal/length tree */
+  uInt md;              /* mask for distance tree */
+  uInt c;               /* bytes to copy */
+  uInt d;               /* distance back to copy from */
+  Bytef *r;             /* copy source pointer */
+
+  /* load input, output, bit values */
+  LOAD
+
+  /* initialize masks */
+  ml = inflate_mask[bl];
+  md = inflate_mask[bd];
+
+  /* do until not enough input or output space for fast loop */
+  do {                          /* assume called with m >= 258 && n >= 10 */
+    /* get literal/length code */
+    GRABBITS(20)                /* max bits for literal/length code */
+    if ((e = (t = tl + ((uInt)b & ml))->exop) == 0)
+    {
+      DUMPBITS(t->bits)
+      Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
+                "inflate:         * literal '%c'\n" :
+                "inflate:         * literal 0x%02x\n", t->base));
+      *q++ = (Byte)t->base;
+      m--;
+      continue;
+    }
+    do {
+      DUMPBITS(t->bits)
+      if (e & 16)
+      {
+        /* get extra bits for length */
+        e &= 15;
+        c = t->base + ((uInt)b & inflate_mask[e]);
+        DUMPBITS(e)
+        Tracevv((stderr, "inflate:         * length %u\n", c));
+
+        /* decode distance base of block to copy */
+        GRABBITS(15);           /* max bits for distance code */
+        e = (t = td + ((uInt)b & md))->exop;
+        do {
+          DUMPBITS(t->bits)
+          if (e & 16)
+          {
+            /* get extra bits to add to distance base */
+            e &= 15;
+            GRABBITS(e)         /* get extra bits (up to 13) */
+            d = t->base + ((uInt)b & inflate_mask[e]);
+            DUMPBITS(e)
+            Tracevv((stderr, "inflate:         * distance %u\n", d));
+
+            /* do the copy */
+            m -= c;
+            r = q - d;
+            if (r < s->window)                  /* wrap if needed */
+            {
+              do {
+                r += s->end - s->window;        /* force pointer in window */
+              } while (r < s->window);          /* covers invalid distances */
+              e = s->end - r;
+              if (c > e)
+              {
+                c -= e;                         /* wrapped copy */
+                do {
+                    *q++ = *r++;
+                } while (--e);
+                r = s->window;
+                do {
+                    *q++ = *r++;
+                } while (--c);
+              }
+              else                              /* normal copy */
+              {
+                *q++ = *r++;  c--;
+                *q++ = *r++;  c--;
+                do {
+                    *q++ = *r++;
+                } while (--c);
+              }
+            }
+            else                                /* normal copy */
+            {
+              *q++ = *r++;  c--;
+              *q++ = *r++;  c--;
+              do {
+                *q++ = *r++;
+              } while (--c);
+            }
+            break;
+          }
+          else if ((e & 64) == 0)
+          {
+            t += t->base;
+            e = (t += ((uInt)b & inflate_mask[e]))->exop;
+          }
+          else
+          {
+            z->msg = (char*)"invalid distance code";
+            UNGRAB
+            UPDATE
+            return Z_DATA_ERROR;
+          }
+        } while (1);
+        break;
+      }
+      if ((e & 64) == 0)
+      {
+        t += t->base;
+        if ((e = (t += ((uInt)b & inflate_mask[e]))->exop) == 0)
+        {
+          DUMPBITS(t->bits)
+          Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
+                    "inflate:         * literal '%c'\n" :
+                    "inflate:         * literal 0x%02x\n", t->base));
+          *q++ = (Byte)t->base;
+          m--;
+          break;
+        }
+      }
+      else if (e & 32)
+      {
+        Tracevv((stderr, "inflate:         * end of block\n"));
+        UNGRAB
+        UPDATE
+        return Z_STREAM_END;
+      }
+      else
+      {
+        z->msg = (char*)"invalid literal/length code";
+        UNGRAB
+        UPDATE
+        return Z_DATA_ERROR;
+      }
+    } while (1);
+  } while (m >= 258 && n >= 10);
+
+  /* not enough input or output--restore pointers and return */
+  UNGRAB
+  UPDATE
+  return Z_OK;
+}
diff --git a/common/zlib/inffast.h b/common/zlib/inffast.h
new file mode 100644
index 00000000..a31a4bbb
--- /dev/null
+++ b/common/zlib/inffast.h
@@ -0,0 +1,17 @@
+/* inffast.h -- header to use inffast.c
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+extern int inflate_fast OF((
+    uInt,
+    uInt,
+    inflate_huft *,
+    inflate_huft *,
+    inflate_blocks_statef *,
+    z_streamp ));
diff --git a/common/zlib/inffixed.h b/common/zlib/inffixed.h
new file mode 100644
index 00000000..77f7e763
--- /dev/null
+++ b/common/zlib/inffixed.h
@@ -0,0 +1,151 @@
+/* inffixed.h -- table for decoding fixed codes
+ * Generated automatically by the maketree.c program
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+local uInt fixed_bl = 9;
+local uInt fixed_bd = 5;
+local inflate_huft fixed_tl[] = {
+    {{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
+    {{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},192},
+    {{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},160},
+    {{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},224},
+    {{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},144},
+    {{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},208},
+    {{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},176},
+    {{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},240},
+    {{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
+    {{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},200},
+    {{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},168},
+    {{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},232},
+    {{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},152},
+    {{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},216},
+    {{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},184},
+    {{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},248},
+    {{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
+    {{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},196},
+    {{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},164},
+    {{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},228},
+    {{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},148},
+    {{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},212},
+    {{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},180},
+    {{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},244},
+    {{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
+    {{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},204},
+    {{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},172},
+    {{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},236},
+    {{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},156},
+    {{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},220},
+    {{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},188},
+    {{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},252},
+    {{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
+    {{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},194},
+    {{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},162},
+    {{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},226},
+    {{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},146},
+    {{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},210},
+    {{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},178},
+    {{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},242},
+    {{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
+    {{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},202},
+    {{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},170},
+    {{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},234},
+    {{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},154},
+    {{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},218},
+    {{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},186},
+    {{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},250},
+    {{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
+    {{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},198},
+    {{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},166},
+    {{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},230},
+    {{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},150},
+    {{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},214},
+    {{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},182},
+    {{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},246},
+    {{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
+    {{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},206},
+    {{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},174},
+    {{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},238},
+    {{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},158},
+    {{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},222},
+    {{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},190},
+    {{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},254},
+    {{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
+    {{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},193},
+    {{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},161},
+    {{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},225},
+    {{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},145},
+    {{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},209},
+    {{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},177},
+    {{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},241},
+    {{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
+    {{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},201},
+    {{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},169},
+    {{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},233},
+    {{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},153},
+    {{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},217},
+    {{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},185},
+    {{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},249},
+    {{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
+    {{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},197},
+    {{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},165},
+    {{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},229},
+    {{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},149},
+    {{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},213},
+    {{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},181},
+    {{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},245},
+    {{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
+    {{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},205},
+    {{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},173},
+    {{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},237},
+    {{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},157},
+    {{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},221},
+    {{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},189},
+    {{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},253},
+    {{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
+    {{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},195},
+    {{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},163},
+    {{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},227},
+    {{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},147},
+    {{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},211},
+    {{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},179},
+    {{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},243},
+    {{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
+    {{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},203},
+    {{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},171},
+    {{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},235},
+    {{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},155},
+    {{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},219},
+    {{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},187},
+    {{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},251},
+    {{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
+    {{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},199},
+    {{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},167},
+    {{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},231},
+    {{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},151},
+    {{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},215},
+    {{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},183},
+    {{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},247},
+    {{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
+    {{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},207},
+    {{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},175},
+    {{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},239},
+    {{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},159},
+    {{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},223},
+    {{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},191},
+    {{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},255}
+  };
+local inflate_huft fixed_td[] = {
+    {{{80,5}},1}, {{{87,5}},257}, {{{83,5}},17}, {{{91,5}},4097},
+    {{{81,5}},5}, {{{89,5}},1025}, {{{85,5}},65}, {{{93,5}},16385},
+    {{{80,5}},3}, {{{88,5}},513}, {{{84,5}},33}, {{{92,5}},8193},
+    {{{82,5}},9}, {{{90,5}},2049}, {{{86,5}},129}, {{{192,5}},24577},
+    {{{80,5}},2}, {{{87,5}},385}, {{{83,5}},25}, {{{91,5}},6145},
+    {{{81,5}},7}, {{{89,5}},1537}, {{{85,5}},97}, {{{93,5}},24577},
+    {{{80,5}},4}, {{{88,5}},769}, {{{84,5}},49}, {{{92,5}},12289},
+    {{{82,5}},13}, {{{90,5}},3073}, {{{86,5}},193}, {{{192,5}},24577}
+  };
diff --git a/common/zlib/inflate.c b/common/zlib/inflate.c
new file mode 100644
index 00000000..dfb2e867
--- /dev/null
+++ b/common/zlib/inflate.c
@@ -0,0 +1,366 @@
+/* inflate.c -- zlib interface to inflate modules
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+#include "zutil.h"
+#include "infblock.h"
+
+struct inflate_blocks_state {int dummy;}; /* for buggy compilers */
+
+typedef enum {
+      METHOD,   /* waiting for method byte */
+      FLAG,     /* waiting for flag byte */
+      DICT4,    /* four dictionary check bytes to go */
+      DICT3,    /* three dictionary check bytes to go */
+      DICT2,    /* two dictionary check bytes to go */
+      DICT1,    /* one dictionary check byte to go */
+      DICT0,    /* waiting for inflateSetDictionary */
+      BLOCKS,   /* decompressing blocks */
+      CHECK4,   /* four check bytes to go */
+      CHECK3,   /* three check bytes to go */
+      CHECK2,   /* two check bytes to go */
+      CHECK1,   /* one check byte to go */
+      DONE,     /* finished check, done */
+      BAD}      /* got an error--stay here */
+inflate_mode;
+
+/* inflate private state */
+struct internal_state {
+
+  /* mode */
+  inflate_mode  mode;   /* current inflate mode */
+
+  /* mode dependent information */
+  union {
+    uInt method;        /* if FLAGS, method byte */
+    struct {
+      uLong was;                /* computed check value */
+      uLong need;               /* stream check value */
+    } check;            /* if CHECK, check values to compare */
+    uInt marker;        /* if BAD, inflateSync's marker bytes count */
+  } sub;        /* submode */
+
+  /* mode independent information */
+  int  nowrap;          /* flag for no wrapper */
+  uInt wbits;           /* log2(window size)  (8..15, defaults to 15) */
+  inflate_blocks_statef 
+    *blocks;            /* current inflate_blocks state */
+
+};
+
+
+int ZEXPORT inflateReset(z)
+z_streamp z;
+{
+  if (z == Z_NULL || z->state == Z_NULL)
+    return Z_STREAM_ERROR;
+  z->total_in = z->total_out = 0;
+  z->msg = Z_NULL;
+  z->state->mode = z->state->nowrap ? BLOCKS : METHOD;
+  inflate_blocks_reset(z->state->blocks, z, Z_NULL);
+  Tracev((stderr, "inflate: reset\n"));
+  return Z_OK;
+}
+
+
+int ZEXPORT inflateEnd(z)
+z_streamp z;
+{
+  if (z == Z_NULL || z->state == Z_NULL || z->zfree == Z_NULL)
+    return Z_STREAM_ERROR;
+  if (z->state->blocks != Z_NULL)
+    inflate_blocks_free(z->state->blocks, z);
+  ZFREE(z, z->state);
+  z->state = Z_NULL;
+  Tracev((stderr, "inflate: end\n"));
+  return Z_OK;
+}
+
+
+int ZEXPORT inflateInit2_(z, w, version, stream_size)
+z_streamp z;
+int w;
+const char *version;
+int stream_size;
+{
+  if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
+      stream_size != sizeof(z_stream))
+      return Z_VERSION_ERROR;
+
+  /* initialize state */
+  if (z == Z_NULL)
+    return Z_STREAM_ERROR;
+  z->msg = Z_NULL;
+  if (z->zalloc == Z_NULL)
+  {
+    z->zalloc = zcalloc;
+    z->opaque = (voidpf)0;
+  }
+  if (z->zfree == Z_NULL) z->zfree = zcfree;
+  if ((z->state = (struct internal_state FAR *)
+       ZALLOC(z,1,sizeof(struct internal_state))) == Z_NULL)
+    return Z_MEM_ERROR;
+  z->state->blocks = Z_NULL;
+
+  /* handle undocumented nowrap option (no zlib header or check) */
+  z->state->nowrap = 0;
+  if (w < 0)
+  {
+    w = - w;
+    z->state->nowrap = 1;
+  }
+
+  /* set window size */
+  if (w < 8 || w > 15)
+  {
+    inflateEnd(z);
+    return Z_STREAM_ERROR;
+  }
+  z->state->wbits = (uInt)w;
+
+  /* create inflate_blocks state */
+  if ((z->state->blocks =
+      inflate_blocks_new(z, z->state->nowrap ? Z_NULL : adler32, (uInt)1 << w))
+      == Z_NULL)
+  {
+    inflateEnd(z);
+    return Z_MEM_ERROR;
+  }
+  Tracev((stderr, "inflate: allocated\n"));
+
+  /* reset state */
+  inflateReset(z);
+  return Z_OK;
+}
+
+
+int ZEXPORT inflateInit_(z, version, stream_size)
+z_streamp z;
+const char *version;
+int stream_size;
+{
+  return inflateInit2_(z, DEF_WBITS, version, stream_size);
+}
+
+
+#define NEEDBYTE {if(z->avail_in==0)return r;r=f;}
+#define NEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
+
+int ZEXPORT inflate(z, f)
+z_streamp z;
+int f;
+{
+  int r;
+  uInt b;
+
+  if (z == Z_NULL || z->state == Z_NULL || z->next_in == Z_NULL)
+    return Z_STREAM_ERROR;
+  f = f == Z_FINISH ? Z_BUF_ERROR : Z_OK;
+  r = Z_BUF_ERROR;
+  while (1) switch (z->state->mode)
+  {
+    case METHOD:
+      NEEDBYTE
+      if (((z->state->sub.method = NEXTBYTE) & 0xf) != Z_DEFLATED)
+      {
+        z->state->mode = BAD;
+        z->msg = (char*)"unknown compression method";
+        z->state->sub.marker = 5;       /* can't try inflateSync */
+        break;
+      }
+      if ((z->state->sub.method >> 4) + 8 > z->state->wbits)
+      {
+        z->state->mode = BAD;
+        z->msg = (char*)"invalid window size";
+        z->state->sub.marker = 5;       /* can't try inflateSync */
+        break;
+      }
+      z->state->mode = FLAG;
+    case FLAG:
+      NEEDBYTE
+      b = NEXTBYTE;
+      if (((z->state->sub.method << 8) + b) % 31)
+      {
+        z->state->mode = BAD;
+        z->msg = (char*)"incorrect header check";
+        z->state->sub.marker = 5;       /* can't try inflateSync */
+        break;
+      }
+      Tracev((stderr, "inflate: zlib header ok\n"));
+      if (!(b & PRESET_DICT))
+      {
+        z->state->mode = BLOCKS;
+        break;
+      }
+      z->state->mode = DICT4;
+    case DICT4:
+      NEEDBYTE
+      z->state->sub.check.need = (uLong)NEXTBYTE << 24;
+      z->state->mode = DICT3;
+    case DICT3:
+      NEEDBYTE
+      z->state->sub.check.need += (uLong)NEXTBYTE << 16;
+      z->state->mode = DICT2;
+    case DICT2:
+      NEEDBYTE
+      z->state->sub.check.need += (uLong)NEXTBYTE << 8;
+      z->state->mode = DICT1;
+    case DICT1:
+      NEEDBYTE
+      z->state->sub.check.need += (uLong)NEXTBYTE;
+      z->adler = z->state->sub.check.need;
+      z->state->mode = DICT0;
+      return Z_NEED_DICT;
+    case DICT0:
+      z->state->mode = BAD;
+      z->msg = (char*)"need dictionary";
+      z->state->sub.marker = 0;       /* can try inflateSync */
+      return Z_STREAM_ERROR;
+    case BLOCKS:
+      r = inflate_blocks(z->state->blocks, z, r);
+      if (r == Z_DATA_ERROR)
+      {
+        z->state->mode = BAD;
+        z->state->sub.marker = 0;       /* can try inflateSync */
+        break;
+      }
+      if (r == Z_OK)
+        r = f;
+      if (r != Z_STREAM_END)
+        return r;
+      r = f;
+      inflate_blocks_reset(z->state->blocks, z, &z->state->sub.check.was);
+      if (z->state->nowrap)
+      {
+        z->state->mode = DONE;
+        break;
+      }
+      z->state->mode = CHECK4;
+    case CHECK4:
+      NEEDBYTE
+      z->state->sub.check.need = (uLong)NEXTBYTE << 24;
+      z->state->mode = CHECK3;
+    case CHECK3:
+      NEEDBYTE
+      z->state->sub.check.need += (uLong)NEXTBYTE << 16;
+      z->state->mode = CHECK2;
+    case CHECK2:
+      NEEDBYTE
+      z->state->sub.check.need += (uLong)NEXTBYTE << 8;
+      z->state->mode = CHECK1;
+    case CHECK1:
+      NEEDBYTE
+      z->state->sub.check.need += (uLong)NEXTBYTE;
+
+      if (z->state->sub.check.was != z->state->sub.check.need)
+      {
+        z->state->mode = BAD;
+        z->msg = (char*)"incorrect data check";
+        z->state->sub.marker = 5;       /* can't try inflateSync */
+        break;
+      }
+      Tracev((stderr, "inflate: zlib check ok\n"));
+      z->state->mode = DONE;
+    case DONE:
+      return Z_STREAM_END;
+    case BAD:
+      return Z_DATA_ERROR;
+    default:
+      return Z_STREAM_ERROR;
+  }
+#ifdef NEED_DUMMY_RETURN
+  return Z_STREAM_ERROR;  /* Some dumb compilers complain without this */
+#endif
+}
+
+
+int ZEXPORT inflateSetDictionary(z, dictionary, dictLength)
+z_streamp z;
+const Bytef *dictionary;
+uInt  dictLength;
+{
+  uInt length = dictLength;
+
+  if (z == Z_NULL || z->state == Z_NULL || z->state->mode != DICT0)
+    return Z_STREAM_ERROR;
+
+  if (adler32(1L, dictionary, dictLength) != z->adler) return Z_DATA_ERROR;
+  z->adler = 1L;
+
+  if (length >= ((uInt)1<<z->state->wbits))
+  {
+    length = (1<<z->state->wbits)-1;
+    dictionary += dictLength - length;
+  }
+  inflate_set_dictionary(z->state->blocks, dictionary, length);
+  z->state->mode = BLOCKS;
+  return Z_OK;
+}
+
+
+int ZEXPORT inflateSync(z)
+z_streamp z;
+{
+  uInt n;       /* number of bytes to look at */
+  Bytef *p;     /* pointer to bytes */
+  uInt m;       /* number of marker bytes found in a row */
+  uLong r, w;   /* temporaries to save total_in and total_out */
+
+  /* set up */
+  if (z == Z_NULL || z->state == Z_NULL)
+    return Z_STREAM_ERROR;
+  if (z->state->mode != BAD)
+  {
+    z->state->mode = BAD;
+    z->state->sub.marker = 0;
+  }
+  if ((n = z->avail_in) == 0)
+    return Z_BUF_ERROR;
+  p = z->next_in;
+  m = z->state->sub.marker;
+
+  /* search */
+  while (n && m < 4)
+  {
+    static const Byte mark[4] = {0, 0, 0xff, 0xff};
+    if (*p == mark[m])
+      m++;
+    else if (*p)
+      m = 0;
+    else
+      m = 4 - m;
+    p++, n--;
+  }
+
+  /* restore */
+  z->total_in += p - z->next_in;
+  z->next_in = p;
+  z->avail_in = n;
+  z->state->sub.marker = m;
+
+  /* return no joy or set up to restart on a new block */
+  if (m != 4)
+    return Z_DATA_ERROR;
+  r = z->total_in;  w = z->total_out;
+  inflateReset(z);
+  z->total_in = r;  z->total_out = w;
+  z->state->mode = BLOCKS;
+  return Z_OK;
+}
+
+
+/* Returns true if inflate is currently at the end of a block generated
+ * by Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
+ * implementation to provide an additional safety check. PPP uses Z_SYNC_FLUSH
+ * but removes the length bytes of the resulting empty stored block. When
+ * decompressing, PPP checks that at the end of input packet, inflate is
+ * waiting for these length bytes.
+ */
+int ZEXPORT inflateSyncPoint(z)
+z_streamp z;
+{
+  if (z == Z_NULL || z->state == Z_NULL || z->state->blocks == Z_NULL)
+    return Z_STREAM_ERROR;
+  return inflate_blocks_sync_point(z->state->blocks);
+}
diff --git a/common/zlib/inftrees.c b/common/zlib/inftrees.c
new file mode 100644
index 00000000..4c32ca30
--- /dev/null
+++ b/common/zlib/inftrees.c
@@ -0,0 +1,454 @@
+/* inftrees.c -- generate Huffman trees for efficient decoding
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+#include "zutil.h"
+#include "inftrees.h"
+
+#if !defined(BUILDFIXED) && !defined(STDC)
+#  define BUILDFIXED   /* non ANSI compilers may not accept inffixed.h */
+#endif
+
+const char inflate_copyright[] =
+   " inflate 1.1.4 Copyright 1995-2002 Mark Adler ";
+/*
+  If you use the zlib library in a product, an acknowledgment is welcome
+  in the documentation of your product. If for some reason you cannot
+  include such an acknowledgment, I would appreciate that you keep this
+  copyright string in the executable of your product.
+ */
+struct internal_state  {int dummy;}; /* for buggy compilers */
+
+/* simplify the use of the inflate_huft type with some defines */
+#define exop word.what.Exop
+#define bits word.what.Bits
+
+
+local int huft_build OF((
+    uIntf *,            /* code lengths in bits */
+    uInt,               /* number of codes */
+    uInt,               /* number of "simple" codes */
+    const uIntf *,      /* list of base values for non-simple codes */
+    const uIntf *,      /* list of extra bits for non-simple codes */
+    inflate_huft * FAR*,/* result: starting table */
+    uIntf *,            /* maximum lookup bits (returns actual) */
+    inflate_huft *,     /* space for trees */
+    uInt *,             /* hufts used in space */
+    uIntf * ));         /* space for values */
+
+/* Tables for deflate from PKZIP's appnote.txt. */
+local const uInt cplens[31] = { /* Copy lengths for literal codes 257..285 */
+        3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
+        35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
+        /* see note #13 above about 258 */
+local const uInt cplext[31] = { /* Extra bits for literal codes 257..285 */
+        0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
+        3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 112, 112}; /* 112==invalid */
+local const uInt cpdist[30] = { /* Copy offsets for distance codes 0..29 */
+        1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+        257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
+        8193, 12289, 16385, 24577};
+local const uInt cpdext[30] = { /* Extra bits for distance codes */
+        0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
+        7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
+        12, 12, 13, 13};
+
+/*
+   Huffman code decoding is performed using a multi-level table lookup.
+   The fastest way to decode is to simply build a lookup table whose
+   size is determined by the longest code.  However, the time it takes
+   to build this table can also be a factor if the data being decoded
+   is not very long.  The most common codes are necessarily the
+   shortest codes, so those codes dominate the decoding time, and hence
+   the speed.  The idea is you can have a shorter table that decodes the
+   shorter, more probable codes, and then point to subsidiary tables for
+   the longer codes.  The time it costs to decode the longer codes is
+   then traded against the time it takes to make longer tables.
+
+   This results of this trade are in the variables lbits and dbits
+   below.  lbits is the number of bits the first level table for literal/
+   length codes can decode in one step, and dbits is the same thing for
+   the distance codes.  Subsequent tables are also less than or equal to
+   those sizes.  These values may be adjusted either when all of the
+   codes are shorter than that, in which case the longest code length in
+   bits is used, or when the shortest code is *longer* than the requested
+   table size, in which case the length of the shortest code in bits is
+   used.
+
+   There are two different values for the two tables, since they code a
+   different number of possibilities each.  The literal/length table
+   codes 286 possible values, or in a flat code, a little over eight
+   bits.  The distance table codes 30 possible values, or a little less
+   than five bits, flat.  The optimum values for speed end up being
+   about one bit more than those, so lbits is 8+1 and dbits is 5+1.
+   The optimum values may differ though from machine to machine, and
+   possibly even between compilers.  Your mileage may vary.
+ */
+
+
+/* If BMAX needs to be larger than 16, then h and x[] should be uLong. */
+#define BMAX 15         /* maximum bit length of any code */
+
+local int huft_build(b, n, s, d, e, t, m, hp, hn, v)
+uIntf *b;               /* code lengths in bits (all assumed <= BMAX) */
+uInt n;                 /* number of codes (assumed <= 288) */
+uInt s;                 /* number of simple-valued codes (0..s-1) */
+const uIntf *d;         /* list of base values for non-simple codes */
+const uIntf *e;         /* list of extra bits for non-simple codes */
+inflate_huft * FAR *t;  /* result: starting table */
+uIntf *m;               /* maximum lookup bits, returns actual */
+inflate_huft *hp;       /* space for trees */
+uInt *hn;               /* hufts used in space */
+uIntf *v;               /* working area: values in order of bit length */
+/* Given a list of code lengths and a maximum table size, make a set of
+   tables to decode that set of codes.  Return Z_OK on success, Z_BUF_ERROR
+   if the given code set is incomplete (the tables are still built in this
+   case), or Z_DATA_ERROR if the input is invalid. */
+{
+
+  uInt a;                       /* counter for codes of length k */
+  uInt c[BMAX+1];               /* bit length count table */
+  uInt f;                       /* i repeats in table every f entries */
+  int g;                        /* maximum code length */
+  int h;                        /* table level */
+  register uInt i;              /* counter, current code */
+  register uInt j;              /* counter */
+  register int k;               /* number of bits in current code */
+  int l;                        /* bits per table (returned in m) */
+  uInt mask;                    /* (1 << w) - 1, to avoid cc -O bug on HP */
+  register uIntf *p;            /* pointer into c[], b[], or v[] */
+  inflate_huft *q;              /* points to current table */
+  struct inflate_huft_s r;      /* table entry for structure assignment */
+  inflate_huft *u[BMAX];        /* table stack */
+  register int w;               /* bits before this table == (l * h) */
+  uInt x[BMAX+1];               /* bit offsets, then code stack */
+  uIntf *xp;                    /* pointer into x */
+  int y;                        /* number of dummy codes added */
+  uInt z;                       /* number of entries in current table */
+
+
+  /* Generate counts for each bit length */
+  p = c;
+#define C0 *p++ = 0;
+#define C2 C0 C0 C0 C0
+#define C4 C2 C2 C2 C2
+  C4                            /* clear c[]--assume BMAX+1 is 16 */
+  p = b;  i = n;
+  do {
+    c[*p++]++;                  /* assume all entries <= BMAX */
+  } while (--i);
+  if (c[0] == n)                /* null input--all zero length codes */
+  {
+    *t = (inflate_huft *)Z_NULL;
+    *m = 0;
+    return Z_OK;
+  }
+
+
+  /* Find minimum and maximum length, bound *m by those */
+  l = *m;
+  for (j = 1; j <= BMAX; j++)
+    if (c[j])
+      break;
+  k = j;                        /* minimum code length */
+  if ((uInt)l < j)
+    l = j;
+  for (i = BMAX; i; i--)
+    if (c[i])
+      break;
+  g = i;                        /* maximum code length */
+  if ((uInt)l > i)
+    l = i;
+  *m = l;
+
+
+  /* Adjust last length count to fill out codes, if needed */
+  for (y = 1 << j; j < i; j++, y <<= 1)
+    if ((y -= c[j]) < 0)
+      return Z_DATA_ERROR;
+  if ((y -= c[i]) < 0)
+    return Z_DATA_ERROR;
+  c[i] += y;
+
+
+  /* Generate starting offsets into the value table for each length */
+  x[1] = j = 0;
+  p = c + 1;  xp = x + 2;
+  while (--i) {                 /* note that i == g from above */
+    *xp++ = (j += *p++);
+  }
+
+
+  /* Make a table of values in order of bit lengths */
+  p = b;  i = 0;
+  do {
+    if ((j = *p++) != 0)
+      v[x[j]++] = i;
+  } while (++i < n);
+  n = x[g];                     /* set n to length of v */
+
+
+  /* Generate the Huffman codes and for each, make the table entries */
+  x[0] = i = 0;                 /* first Huffman code is zero */
+  p = v;                        /* grab values in bit order */
+  h = -1;                       /* no tables yet--level -1 */
+  w = -l;                       /* bits decoded == (l * h) */
+  u[0] = (inflate_huft *)Z_NULL;        /* just to keep compilers happy */
+  q = (inflate_huft *)Z_NULL;   /* ditto */
+  z = 0;                        /* ditto */
+
+  /* go through the bit lengths (k already is bits in shortest code) */
+  for (; k <= g; k++)
+  {
+    a = c[k];
+    while (a--)
+    {
+      /* here i is the Huffman code of length k bits for value *p */
+      /* make tables up to required level */
+      while (k > w + l)
+      {
+        h++;
+        w += l;                 /* previous table always l bits */
+
+        /* compute minimum size table less than or equal to l bits */
+        z = g - w;
+        z = z > (uInt)l ? l : z;        /* table size upper limit */
+        if ((f = 1 << (j = k - w)) > a + 1)     /* try a k-w bit table */
+        {                       /* too few codes for k-w bit table */
+          f -= a + 1;           /* deduct codes from patterns left */
+          xp = c + k;
+          if (j < z)
+            while (++j < z)     /* try smaller tables up to z bits */
+            {
+              if ((f <<= 1) <= *++xp)
+                break;          /* enough codes to use up j bits */
+              f -= *xp;         /* else deduct codes from patterns */
+            }
+        }
+        z = 1 << j;             /* table entries for j-bit table */
+
+        /* allocate new table */
+        if (*hn + z > MANY)     /* (note: doesn't matter for fixed) */
+          return Z_DATA_ERROR;  /* overflow of MANY */
+        u[h] = q = hp + *hn;
+        *hn += z;
+
+        /* connect to last table, if there is one */
+        if (h)
+        {
+          x[h] = i;             /* save pattern for backing up */
+          r.bits = (Byte)l;     /* bits to dump before this table */
+          r.exop = (Byte)j;     /* bits in this table */
+          j = i >> (w - l);
+          r.base = (uInt)(q - u[h-1] - j);   /* offset to this table */
+          u[h-1][j] = r;        /* connect to last table */
+        }
+        else
+          *t = q;               /* first table is returned result */
+      }
+
+      /* set up table entry in r */
+      r.bits = (Byte)(k - w);
+      if (p >= v + n)
+        r.exop = 128 + 64;      /* out of values--invalid code */
+      else if (*p < s)
+      {
+        r.exop = (Byte)(*p < 256 ? 0 : 32 + 64);     /* 256 is end-of-block */
+        r.base = *p++;          /* simple code is just the value */
+      }
+      else
+      {
+        r.exop = (Byte)(e[*p - s] + 16 + 64);/* non-simple--look up in lists */
+        r.base = d[*p++ - s];
+      }
+
+      /* fill code-like entries with r */
+      f = 1 << (k - w);
+      for (j = i >> w; j < z; j += f)
+        q[j] = r;
+
+      /* backwards increment the k-bit code i */
+      for (j = 1 << (k - 1); i & j; j >>= 1)
+        i ^= j;
+      i ^= j;
+
+      /* backup over finished tables */
+      mask = (1 << w) - 1;      /* needed on HP, cc -O bug */
+      while ((i & mask) != x[h])
+      {
+        h--;                    /* don't need to update q */
+        w -= l;
+        mask = (1 << w) - 1;
+      }
+    }
+  }
+
+
+  /* Return Z_BUF_ERROR if we were given an incomplete table */
+  return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
+}
+
+
+int inflate_trees_bits(c, bb, tb, hp, z)
+uIntf *c;               /* 19 code lengths */
+uIntf *bb;              /* bits tree desired/actual depth */
+inflate_huft * FAR *tb; /* bits tree result */
+inflate_huft *hp;       /* space for trees */
+z_streamp z;            /* for messages */
+{
+  int r;
+  uInt hn = 0;          /* hufts used in space */
+  uIntf *v;             /* work area for huft_build */
+
+  if ((v = (uIntf*)ZALLOC(z, 19, sizeof(uInt))) == Z_NULL)
+    return Z_MEM_ERROR;
+  r = huft_build(c, 19, 19, (uIntf*)Z_NULL, (uIntf*)Z_NULL,
+                 tb, bb, hp, &hn, v);
+  if (r == Z_DATA_ERROR)
+    z->msg = (char*)"oversubscribed dynamic bit lengths tree";
+  else if (r == Z_BUF_ERROR || *bb == 0)
+  {
+    z->msg = (char*)"incomplete dynamic bit lengths tree";
+    r = Z_DATA_ERROR;
+  }
+  ZFREE(z, v);
+  return r;
+}
+
+
+int inflate_trees_dynamic(nl, nd, c, bl, bd, tl, td, hp, z)
+uInt nl;                /* number of literal/length codes */
+uInt nd;                /* number of distance codes */
+uIntf *c;               /* that many (total) code lengths */
+uIntf *bl;              /* literal desired/actual bit depth */
+uIntf *bd;              /* distance desired/actual bit depth */
+inflate_huft * FAR *tl; /* literal/length tree result */
+inflate_huft * FAR *td; /* distance tree result */
+inflate_huft *hp;       /* space for trees */
+z_streamp z;            /* for messages */
+{
+  int r;
+  uInt hn = 0;          /* hufts used in space */
+  uIntf *v;             /* work area for huft_build */
+
+  /* allocate work area */
+  if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
+    return Z_MEM_ERROR;
+
+  /* build literal/length tree */
+  r = huft_build(c, nl, 257, cplens, cplext, tl, bl, hp, &hn, v);
+  if (r != Z_OK || *bl == 0)
+  {
+    if (r == Z_DATA_ERROR)
+      z->msg = (char*)"oversubscribed literal/length tree";
+    else if (r != Z_MEM_ERROR)
+    {
+      z->msg = (char*)"incomplete literal/length tree";
+      r = Z_DATA_ERROR;
+    }
+    ZFREE(z, v);
+    return r;
+  }
+
+  /* build distance tree */
+  r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, hp, &hn, v);
+  if (r != Z_OK || (*bd == 0 && nl > 257))
+  {
+    if (r == Z_DATA_ERROR)
+      z->msg = (char*)"oversubscribed distance tree";
+    else if (r == Z_BUF_ERROR) {
+#ifdef PKZIP_BUG_WORKAROUND
+      r = Z_OK;
+    }
+#else
+      z->msg = (char*)"incomplete distance tree";
+      r = Z_DATA_ERROR;
+    }
+    else if (r != Z_MEM_ERROR)
+    {
+      z->msg = (char*)"empty distance tree with lengths";
+      r = Z_DATA_ERROR;
+    }
+    ZFREE(z, v);
+    return r;
+#endif
+  }
+
+  /* done */
+  ZFREE(z, v);
+  return Z_OK;
+}
+
+
+/* build fixed tables only once--keep them here */
+#ifdef BUILDFIXED
+local int fixed_built = 0;
+#define FIXEDH 544      /* number of hufts used by fixed tables */
+local inflate_huft fixed_mem[FIXEDH];
+local uInt fixed_bl;
+local uInt fixed_bd;
+local inflate_huft *fixed_tl;
+local inflate_huft *fixed_td;
+#else
+#include "inffixed.h"
+#endif
+
+
+int inflate_trees_fixed(bl, bd, tl, td, z)
+uIntf *bl;               /* literal desired/actual bit depth */
+uIntf *bd;               /* distance desired/actual bit depth */
+inflate_huft * FAR *tl;  /* literal/length tree result */
+inflate_huft * FAR *td;  /* distance tree result */
+z_streamp z;             /* for memory allocation */
+{
+#ifdef BUILDFIXED
+  /* build fixed tables if not already */
+  if (!fixed_built)
+  {
+    int k;              /* temporary variable */
+    uInt f = 0;         /* number of hufts used in fixed_mem */
+    uIntf *c;           /* length list for huft_build */
+    uIntf *v;           /* work area for huft_build */
+
+    /* allocate memory */
+    if ((c = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
+      return Z_MEM_ERROR;
+    if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
+    {
+      ZFREE(z, c);
+      return Z_MEM_ERROR;
+    }
+
+    /* literal table */
+    for (k = 0; k < 144; k++)
+      c[k] = 8;
+    for (; k < 256; k++)
+      c[k] = 9;
+    for (; k < 280; k++)
+      c[k] = 7;
+    for (; k < 288; k++)
+      c[k] = 8;
+    fixed_bl = 9;
+    huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl,
+               fixed_mem, &f, v);
+
+    /* distance table */
+    for (k = 0; k < 30; k++)
+      c[k] = 5;
+    fixed_bd = 5;
+    huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd,
+               fixed_mem, &f, v);
+
+    /* done */
+    ZFREE(z, v);
+    ZFREE(z, c);
+    fixed_built = 1;
+  }
+#endif
+  *bl = fixed_bl;
+  *bd = fixed_bd;
+  *tl = fixed_tl;
+  *td = fixed_td;
+  return Z_OK;
+}
diff --git a/common/zlib/inftrees.h b/common/zlib/inftrees.h
new file mode 100644
index 00000000..04b73b72
--- /dev/null
+++ b/common/zlib/inftrees.h
@@ -0,0 +1,58 @@
+/* inftrees.h -- header to use inftrees.c
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* Huffman code lookup table entry--this entry is four bytes for machines
+   that have 16-bit pointers (e.g. PC's in the small or medium model). */
+
+typedef struct inflate_huft_s FAR inflate_huft;
+
+struct inflate_huft_s {
+  union {
+    struct {
+      Byte Exop;        /* number of extra bits or operation */
+      Byte Bits;        /* number of bits in this code or subcode */
+    } what;
+    uInt pad;           /* pad structure to a power of 2 (4 bytes for */
+  } word;               /*  16-bit, 8 bytes for 32-bit int's) */
+  uInt base;            /* literal, length base, distance base,
+                           or table offset */
+};
+
+/* Maximum size of dynamic tree.  The maximum found in a long but non-
+   exhaustive search was 1004 huft structures (850 for length/literals
+   and 154 for distances, the latter actually the result of an
+   exhaustive search).  The actual maximum is not known, but the
+   value below is more than safe. */
+#define MANY 1440
+
+extern int inflate_trees_bits OF((
+    uIntf *,                    /* 19 code lengths */
+    uIntf *,                    /* bits tree desired/actual depth */
+    inflate_huft * FAR *,       /* bits tree result */
+    inflate_huft *,             /* space for trees */
+    z_streamp));                /* for messages */
+
+extern int inflate_trees_dynamic OF((
+    uInt,                       /* number of literal/length codes */
+    uInt,                       /* number of distance codes */
+    uIntf *,                    /* that many (total) code lengths */
+    uIntf *,                    /* literal desired/actual bit depth */
+    uIntf *,                    /* distance desired/actual bit depth */
+    inflate_huft * FAR *,       /* literal/length tree result */
+    inflate_huft * FAR *,       /* distance tree result */
+    inflate_huft *,             /* space for trees */
+    z_streamp));                /* for messages */
+
+extern int inflate_trees_fixed OF((
+    uIntf *,                    /* literal desired/actual bit depth */
+    uIntf *,                    /* distance desired/actual bit depth */
+    inflate_huft * FAR *,       /* literal/length tree result */
+    inflate_huft * FAR *,       /* distance tree result */
+    z_streamp));                /* for memory allocation */
diff --git a/common/zlib/infutil.c b/common/zlib/infutil.c
new file mode 100644
index 00000000..9a076221
--- /dev/null
+++ b/common/zlib/infutil.c
@@ -0,0 +1,87 @@
+/* inflate_util.c -- data and routines common to blocks and codes
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+#include "zutil.h"
+#include "infblock.h"
+#include "inftrees.h"
+#include "infcodes.h"
+#include "infutil.h"
+
+struct inflate_codes_state {int dummy;}; /* for buggy compilers */
+
+/* And'ing with mask[n] masks the lower n bits */
+uInt inflate_mask[17] = {
+    0x0000,
+    0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
+    0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
+};
+
+
+/* copy as much as possible from the sliding window to the output area */
+int inflate_flush(s, z, r)
+inflate_blocks_statef *s;
+z_streamp z;
+int r;
+{
+  uInt n;
+  Bytef *p;
+  Bytef *q;
+
+  /* local copies of source and destination pointers */
+  p = z->next_out;
+  q = s->read;
+
+  /* compute number of bytes to copy as far as end of window */
+  n = (uInt)((q <= s->write ? s->write : s->end) - q);
+  if (n > z->avail_out) n = z->avail_out;
+  if (n && r == Z_BUF_ERROR) r = Z_OK;
+
+  /* update counters */
+  z->avail_out -= n;
+  z->total_out += n;
+
+  /* update check information */
+  if (s->checkfn != Z_NULL)
+    z->adler = s->check = (*s->checkfn)(s->check, q, n);
+
+  /* copy as far as end of window */
+  zmemcpy(p, q, n);
+  p += n;
+  q += n;
+
+  /* see if more to copy at beginning of window */
+  if (q == s->end)
+  {
+    /* wrap pointers */
+    q = s->window;
+    if (s->write == s->end)
+      s->write = s->window;
+
+    /* compute bytes to copy */
+    n = (uInt)(s->write - q);
+    if (n > z->avail_out) n = z->avail_out;
+    if (n && r == Z_BUF_ERROR) r = Z_OK;
+
+    /* update counters */
+    z->avail_out -= n;
+    z->total_out += n;
+
+    /* update check information */
+    if (s->checkfn != Z_NULL)
+      z->adler = s->check = (*s->checkfn)(s->check, q, n);
+
+    /* copy */
+    zmemcpy(p, q, n);
+    p += n;
+    q += n;
+  }
+
+  /* update pointers */
+  z->next_out = p;
+  s->read = q;
+
+  /* done */
+  return r;
+}
diff --git a/common/zlib/infutil.h b/common/zlib/infutil.h
new file mode 100644
index 00000000..4401df82
--- /dev/null
+++ b/common/zlib/infutil.h
@@ -0,0 +1,98 @@
+/* infutil.h -- types and macros common to blocks and codes
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+#ifndef _INFUTIL_H
+#define _INFUTIL_H
+
+typedef enum {
+      TYPE,     /* get type bits (3, including end bit) */
+      LENS,     /* get lengths for stored */
+      STORED,   /* processing stored block */
+      TABLE,    /* get table lengths */
+      BTREE,    /* get bit lengths tree for a dynamic block */
+      DTREE,    /* get length, distance trees for a dynamic block */
+      CODES,    /* processing fixed or dynamic block */
+      DRY,      /* output remaining window bytes */
+      DONE,     /* finished last block, done */
+      BAD}      /* got a data error--stuck here */
+inflate_block_mode;
+
+/* inflate blocks semi-private state */
+struct inflate_blocks_state {
+
+  /* mode */
+  inflate_block_mode  mode;     /* current inflate_block mode */
+
+  /* mode dependent information */
+  union {
+    uInt left;          /* if STORED, bytes left to copy */
+    struct {
+      uInt table;               /* table lengths (14 bits) */
+      uInt index;               /* index into blens (or border) */
+      uIntf *blens;             /* bit lengths of codes */
+      uInt bb;                  /* bit length tree depth */
+      inflate_huft *tb;         /* bit length decoding tree */
+    } trees;            /* if DTREE, decoding info for trees */
+    struct {
+      inflate_codes_statef 
+         *codes;
+    } decode;           /* if CODES, current state */
+  } sub;                /* submode */
+  uInt last;            /* true if this block is the last block */
+
+  /* mode independent information */
+  uInt bitk;            /* bits in bit buffer */
+  uLong bitb;           /* bit buffer */
+  inflate_huft *hufts;  /* single malloc for tree space */
+  Bytef *window;        /* sliding window */
+  Bytef *end;           /* one byte after sliding window */
+  Bytef *read;          /* window read pointer */
+  Bytef *write;         /* window write pointer */
+  check_func checkfn;   /* check function */
+  uLong check;          /* check on output */
+
+};
+
+
+/* defines for inflate input/output */
+/*   update pointers and return */
+#define UPDBITS {s->bitb=b;s->bitk=k;}
+#define UPDIN {z->avail_in=n;z->total_in+=p-z->next_in;z->next_in=p;}
+#define UPDOUT {s->write=q;}
+#define UPDATE {UPDBITS UPDIN UPDOUT}
+#define LEAVE {UPDATE return inflate_flush(s,z,r);}
+/*   get bytes and bits */
+#define LOADIN {p=z->next_in;n=z->avail_in;b=s->bitb;k=s->bitk;}
+#define NEEDBYTE {if(n)r=Z_OK;else LEAVE}
+#define NEXTBYTE (n--,*p++)
+#define NEEDBITS(j) {while(k<(j)){NEEDBYTE;b|=((uLong)NEXTBYTE)<<k;k+=8;}}
+#define DUMPBITS(j) {b>>=(j);k-=(j);}
+/*   output bytes */
+#define WAVAIL (uInt)(q<s->read?s->read-q-1:s->end-q)
+#define LOADOUT {q=s->write;m=(uInt)WAVAIL;}
+#define WRAP {if(q==s->end&&s->read!=s->window){q=s->window;m=(uInt)WAVAIL;}}
+#define FLUSH {UPDOUT r=inflate_flush(s,z,r); LOADOUT}
+#define NEEDOUT {if(m==0){WRAP if(m==0){FLUSH WRAP if(m==0) LEAVE}}r=Z_OK;}
+#define OUTBYTE(a) {*q++=(Byte)(a);m--;}
+/*   load local pointers */
+#define LOAD {LOADIN LOADOUT}
+
+/* masks for lower bits (size given to avoid silly warnings with Visual C++) */
+extern uInt inflate_mask[17];
+
+/* copy as much as possible from the sliding window to the output area */
+extern int inflate_flush OF((
+    inflate_blocks_statef *,
+    z_streamp ,
+    int));
+
+struct internal_state      {int dummy;}; /* for buggy compilers */
+
+#endif
diff --git a/common/zlib/maketree.c b/common/zlib/maketree.c
new file mode 100644
index 00000000..a16d4b14
--- /dev/null
+++ b/common/zlib/maketree.c
@@ -0,0 +1,85 @@
+/* maketree.c -- make inffixed.h table for decoding fixed codes
+ * Copyright (C) 1995-2002 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* This program is included in the distribution for completeness.
+   You do not need to compile or run this program since inffixed.h
+   is already included in the distribution.  To use this program
+   you need to compile zlib with BUILDFIXED defined and then compile
+   and link this program with the zlib library.  Then the output of
+   this program can be piped to inffixed.h. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "zutil.h"
+#include "inftrees.h"
+
+/* simplify the use of the inflate_huft type with some defines */
+#define exop word.what.Exop
+#define bits word.what.Bits
+
+/* generate initialization table for an inflate_huft structure array */
+void maketree(uInt b, inflate_huft *t)
+{
+  int i, e;
+
+  i = 0;
+  while (1)
+  {
+    e = t[i].exop;
+    if (e && (e & (16+64)) == 0)        /* table pointer */
+    {
+      fprintf(stderr, "maketree: cannot initialize sub-tables!\n");
+      exit(1);
+    }
+    if (i % 4 == 0)
+      printf("\n   ");
+    printf(" {{{%u,%u}},%u}", t[i].exop, t[i].bits, t[i].base);
+    if (++i == (1<<b))
+      break;
+    putchar(',');
+  }
+  puts("");
+}
+
+/* create the fixed tables in C initialization syntax */
+void main(void)
+{
+  int r;
+  uInt bl, bd;
+  inflate_huft *tl, *td;
+  z_stream z;
+
+  z.zalloc = zcalloc;
+  z.opaque = (voidpf)0;
+  z.zfree = zcfree;
+  r = inflate_trees_fixed(&bl, &bd, &tl, &td, &z);
+  if (r)
+  {
+    fprintf(stderr, "inflate_trees_fixed error %d\n", r);
+    return;
+  }
+  puts("/* inffixed.h -- table for decoding fixed codes");
+  puts(" * Generated automatically by the maketree.c program");
+  puts(" */");
+  puts("");
+  puts("/* WARNING: this file should *not* be used by applications. It is");
+  puts("   part of the implementation of the compression library and is");
+  puts("   subject to change. Applications should only use zlib.h.");
+  puts(" */");
+  puts("");
+  printf("local uInt fixed_bl = %d;\n", bl);
+  printf("local uInt fixed_bd = %d;\n", bd);
+  printf("local inflate_huft fixed_tl[] = {");
+  maketree(bl, tl);
+  puts("  };");
+  printf("local inflate_huft fixed_td[] = {");
+  maketree(bd, td);
+  puts("  };");
+}
diff --git a/common/zlib/minigzip.c b/common/zlib/minigzip.c
new file mode 100644
index 00000000..8be02bd6
--- /dev/null
+++ b/common/zlib/minigzip.c
@@ -0,0 +1,320 @@
+/* minigzip.c -- simulate gzip using the zlib compression library
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/*
+ * minigzip is a minimal implementation of the gzip utility. This is
+ * only an example of using zlib and isn't meant to replace the
+ * full-featured gzip. No attempt is made to deal with file systems
+ * limiting names to 14 or 8+3 characters, etc... Error checking is
+ * very limited. So use minigzip only for testing; use gzip for the
+ * real thing. On MSDOS, use only on file names without extension
+ * or in pipe mode.
+ */
+
+/* @(#) $Id: minigzip.c,v 1.1 2004/10/08 09:44:26 const_k Exp $ */
+
+#include <stdio.h>
+#include "zlib.h"
+
+#ifdef STDC
+#  include <string.h>
+#  include <stdlib.h>
+#else
+   extern void exit  OF((int));
+#endif
+
+#ifdef USE_MMAP
+#  include <sys/types.h>
+#  include <sys/mman.h>
+#  include <sys/stat.h>
+#endif
+
+#if defined(MSDOS) || defined(OS2) || defined(WIN32)
+#  include <fcntl.h>
+#  include <io.h>
+#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
+#else
+#  define SET_BINARY_MODE(file)
+#endif
+
+#ifdef VMS
+#  define unlink delete
+#  define GZ_SUFFIX "-gz"
+#endif
+#ifdef RISCOS
+#  define unlink remove
+#  define GZ_SUFFIX "-gz"
+#  define fileno(file) file->__file
+#endif
+#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+#  include <unix.h> /* for fileno */
+#endif
+
+#ifndef WIN32 /* unlink already in stdio.h for WIN32 */
+  extern int unlink OF((const char *));
+#endif
+
+#ifndef GZ_SUFFIX
+#  define GZ_SUFFIX ".gz"
+#endif
+#define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
+
+#define BUFLEN      16384
+#define MAX_NAME_LEN 1024
+
+#ifdef MAXSEG_64K
+#  define local static
+   /* Needed for systems with limitation on stack size. */
+#else
+#  define local
+#endif
+
+char *prog;
+
+void error            OF((const char *msg));
+void gz_compress      OF((FILE   *in, gzFile out));
+#ifdef USE_MMAP
+int  gz_compress_mmap OF((FILE   *in, gzFile out));
+#endif
+void gz_uncompress    OF((gzFile in, FILE   *out));
+void file_compress    OF((char  *file, char *mode));
+void file_uncompress  OF((char  *file));
+int  main             OF((int argc, char *argv[]));
+
+/* ===========================================================================
+ * Display error message and exit
+ */
+void error(msg)
+    const char *msg;
+{
+    fprintf(stderr, "%s: %s\n", prog, msg);
+    exit(1);
+}
+
+/* ===========================================================================
+ * Compress input to output then close both files.
+ */
+
+void gz_compress(in, out)
+    FILE   *in;
+    gzFile out;
+{
+    local char buf[BUFLEN];
+    int len;
+    int err;
+
+#ifdef USE_MMAP
+    /* Try first compressing with mmap. If mmap fails (minigzip used in a
+     * pipe), use the normal fread loop.
+     */
+    if (gz_compress_mmap(in, out) == Z_OK) return;
+#endif
+    for (;;) {
+        len = fread(buf, 1, sizeof(buf), in);
+        if (ferror(in)) {
+            perror("fread");
+            exit(1);
+        }
+        if (len == 0) break;
+
+        if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
+    }
+    fclose(in);
+    if (gzclose(out) != Z_OK) error("failed gzclose");
+}
+
+#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
+
+/* Try compressing the input file at once using mmap. Return Z_OK if
+ * if success, Z_ERRNO otherwise.
+ */
+int gz_compress_mmap(in, out)
+    FILE   *in;
+    gzFile out;
+{
+    int len;
+    int err;
+    int ifd = fileno(in);
+    caddr_t buf;    /* mmap'ed buffer for the entire input file */
+    off_t buf_len;  /* length of the input file */
+    struct stat sb;
+
+    /* Determine the size of the file, needed for mmap: */
+    if (fstat(ifd, &sb) < 0) return Z_ERRNO;
+    buf_len = sb.st_size;
+    if (buf_len <= 0) return Z_ERRNO;
+
+    /* Now do the actual mmap: */
+    buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0); 
+    if (buf == (caddr_t)(-1)) return Z_ERRNO;
+
+    /* Compress the whole file at once: */
+    len = gzwrite(out, (char *)buf, (unsigned)buf_len);
+
+    if (len != (int)buf_len) error(gzerror(out, &err));
+
+    munmap(buf, buf_len);
+    fclose(in);
+    if (gzclose(out) != Z_OK) error("failed gzclose");
+    return Z_OK;
+}
+#endif /* USE_MMAP */
+
+/* ===========================================================================
+ * Uncompress input to output then close both files.
+ */
+void gz_uncompress(in, out)
+    gzFile in;
+    FILE   *out;
+{
+    local char buf[BUFLEN];
+    int len;
+    int err;
+
+    for (;;) {
+        len = gzread(in, buf, sizeof(buf));
+        if (len < 0) error (gzerror(in, &err));
+        if (len == 0) break;
+
+        if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {
+	    error("failed fwrite");
+	}
+    }
+    if (fclose(out)) error("failed fclose");
+
+    if (gzclose(in) != Z_OK) error("failed gzclose");
+}
+
+
+/* ===========================================================================
+ * Compress the given file: create a corresponding .gz file and remove the
+ * original.
+ */
+void file_compress(file, mode)
+    char  *file;
+    char  *mode;
+{
+    local char outfile[MAX_NAME_LEN];
+    FILE  *in;
+    gzFile out;
+
+    strcpy(outfile, file);
+    strcat(outfile, GZ_SUFFIX);
+
+    in = fopen(file, "rb");
+    if (in == NULL) {
+        perror(file);
+        exit(1);
+    }
+    out = gzopen(outfile, mode);
+    if (out == NULL) {
+        fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
+        exit(1);
+    }
+    gz_compress(in, out);
+
+    unlink(file);
+}
+
+
+/* ===========================================================================
+ * Uncompress the given file and remove the original.
+ */
+void file_uncompress(file)
+    char  *file;
+{
+    local char buf[MAX_NAME_LEN];
+    char *infile, *outfile;
+    FILE  *out;
+    gzFile in;
+    int len = strlen(file);
+
+    strcpy(buf, file);
+
+    if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {
+        infile = file;
+        outfile = buf;
+        outfile[len-3] = '\0';
+    } else {
+        outfile = file;
+        infile = buf;
+        strcat(infile, GZ_SUFFIX);
+    }
+    in = gzopen(infile, "rb");
+    if (in == NULL) {
+        fprintf(stderr, "%s: can't gzopen %s\n", prog, infile);
+        exit(1);
+    }
+    out = fopen(outfile, "wb");
+    if (out == NULL) {
+        perror(file);
+        exit(1);
+    }
+
+    gz_uncompress(in, out);
+
+    unlink(infile);
+}
+
+
+/* ===========================================================================
+ * Usage:  minigzip [-d] [-f] [-h] [-1 to -9] [files...]
+ *   -d : decompress
+ *   -f : compress with Z_FILTERED
+ *   -h : compress with Z_HUFFMAN_ONLY
+ *   -1 to -9 : compression level
+ */
+
+int main(argc, argv)
+    int argc;
+    char *argv[];
+{
+    int uncompr = 0;
+    gzFile file;
+    char outmode[20];
+
+    strcpy(outmode, "wb6 ");
+
+    prog = argv[0];
+    argc--, argv++;
+
+    while (argc > 0) {
+      if (strcmp(*argv, "-d") == 0)
+	uncompr = 1;
+      else if (strcmp(*argv, "-f") == 0)
+	outmode[3] = 'f';
+      else if (strcmp(*argv, "-h") == 0)
+	outmode[3] = 'h';
+      else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' &&
+	       (*argv)[2] == 0)
+	outmode[2] = (*argv)[1];
+      else
+	break;
+      argc--, argv++;
+    }
+    if (argc == 0) {
+        SET_BINARY_MODE(stdin);
+        SET_BINARY_MODE(stdout);
+        if (uncompr) {
+            file = gzdopen(fileno(stdin), "rb");
+            if (file == NULL) error("can't gzdopen stdin");
+            gz_uncompress(file, stdout);
+        } else {
+            file = gzdopen(fileno(stdout), outmode);
+            if (file == NULL) error("can't gzdopen stdout");
+            gz_compress(stdin, file);
+        }
+    } else {
+        do {
+            if (uncompr) {
+                file_uncompress(*argv);
+            } else {
+                file_compress(*argv, outmode);
+            }
+        } while (argv++, --argc);
+    }
+    exit(0);
+    return 0; /* to avoid warning */
+}
diff --git a/common/zlib/trees.c b/common/zlib/trees.c
new file mode 100644
index 00000000..123c2b32
--- /dev/null
+++ b/common/zlib/trees.c
@@ -0,0 +1,1214 @@
+/* trees.c -- output deflated data using Huffman coding
+ * Copyright (C) 1995-2002 Jean-loup Gailly
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/*
+ *  ALGORITHM
+ *
+ *      The "deflation" process uses several Huffman trees. The more
+ *      common source values are represented by shorter bit sequences.
+ *
+ *      Each code tree is stored in a compressed form which is itself
+ * a Huffman encoding of the lengths of all the code strings (in
+ * ascending order by source values).  The actual code strings are
+ * reconstructed from the lengths in the inflate process, as described
+ * in the deflate specification.
+ *
+ *  REFERENCES
+ *
+ *      Deutsch, L.P.,"'Deflate' Compressed Data Format Specification".
+ *      Available in ftp.uu.net:/pub/archiving/zip/doc/deflate-1.1.doc
+ *
+ *      Storer, James A.
+ *          Data Compression:  Methods and Theory, pp. 49-50.
+ *          Computer Science Press, 1988.  ISBN 0-7167-8156-5.
+ *
+ *      Sedgewick, R.
+ *          Algorithms, p290.
+ *          Addison-Wesley, 1983. ISBN 0-201-06672-6.
+ */
+
+/* @(#) $Id: trees.c,v 1.1 2004/10/08 09:44:26 const_k Exp $ */
+
+/* #define GEN_TREES_H */
+
+#include "deflate.h"
+
+#ifdef DEBUG
+#  include <ctype.h>
+#endif
+
+/* ===========================================================================
+ * Constants
+ */
+
+#define MAX_BL_BITS 7
+/* Bit length codes must not exceed MAX_BL_BITS bits */
+
+#define END_BLOCK 256
+/* end of block literal code */
+
+#define REP_3_6      16
+/* repeat previous bit length 3-6 times (2 bits of repeat count) */
+
+#define REPZ_3_10    17
+/* repeat a zero length 3-10 times  (3 bits of repeat count) */
+
+#define REPZ_11_138  18
+/* repeat a zero length 11-138 times  (7 bits of repeat count) */
+
+local const int extra_lbits[LENGTH_CODES] /* extra bits for each length code */
+   = {0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0};
+
+local const int extra_dbits[D_CODES] /* extra bits for each distance code */
+   = {0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
+
+local const int extra_blbits[BL_CODES]/* extra bits for each bit length code */
+   = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,3,7};
+
+local const uch bl_order[BL_CODES]
+   = {16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15};
+/* The lengths of the bit length codes are sent in order of decreasing
+ * probability, to avoid transmitting the lengths for unused bit length codes.
+ */
+
+#define Buf_size (8 * 2*sizeof(char))
+/* Number of bits used within bi_buf. (bi_buf might be implemented on
+ * more than 16 bits on some systems.)
+ */
+
+/* ===========================================================================
+ * Local data. These are initialized only once.
+ */
+
+#define DIST_CODE_LEN  512 /* see definition of array dist_code below */
+
+#if defined(GEN_TREES_H) || !defined(STDC)
+/* non ANSI compilers may not accept trees.h */
+
+local ct_data static_ltree[L_CODES+2];
+/* The static literal tree. Since the bit lengths are imposed, there is no
+ * need for the L_CODES extra codes used during heap construction. However
+ * The codes 286 and 287 are needed to build a canonical tree (see _tr_init
+ * below).
+ */
+
+local ct_data static_dtree[D_CODES];
+/* The static distance tree. (Actually a trivial tree since all codes use
+ * 5 bits.)
+ */
+
+uch _dist_code[DIST_CODE_LEN];
+/* Distance codes. The first 256 values correspond to the distances
+ * 3 .. 258, the last 256 values correspond to the top 8 bits of
+ * the 15 bit distances.
+ */
+
+uch _length_code[MAX_MATCH-MIN_MATCH+1];
+/* length code for each normalized match length (0 == MIN_MATCH) */
+
+local int base_length[LENGTH_CODES];
+/* First normalized length for each code (0 = MIN_MATCH) */
+
+local int base_dist[D_CODES];
+/* First normalized distance for each code (0 = distance of 1) */
+
+#else
+#  include "trees.h"
+#endif /* GEN_TREES_H */
+
+struct static_tree_desc_s {
+    const ct_data *static_tree;  /* static tree or NULL */
+    const intf *extra_bits;      /* extra bits for each code or NULL */
+    int     extra_base;          /* base index for extra_bits */
+    int     elems;               /* max number of elements in the tree */
+    int     max_length;          /* max bit length for the codes */
+};
+
+local static_tree_desc  static_l_desc =
+{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS};
+
+local static_tree_desc  static_d_desc =
+{static_dtree, extra_dbits, 0,          D_CODES, MAX_BITS};
+
+local static_tree_desc  static_bl_desc =
+{(const ct_data *)0, extra_blbits, 0,   BL_CODES, MAX_BL_BITS};
+
+/* ===========================================================================
+ * Local (static) routines in this file.
+ */
+
+local void tr_static_init OF((void));
+local void init_block     OF((deflate_state *s));
+local void pqdownheap     OF((deflate_state *s, ct_data *tree, int k));
+local void gen_bitlen     OF((deflate_state *s, tree_desc *desc));
+local void gen_codes      OF((ct_data *tree, int max_code, ushf *bl_count));
+local void build_tree     OF((deflate_state *s, tree_desc *desc));
+local void scan_tree      OF((deflate_state *s, ct_data *tree, int max_code));
+local void send_tree      OF((deflate_state *s, ct_data *tree, int max_code));
+local int  build_bl_tree  OF((deflate_state *s));
+local void send_all_trees OF((deflate_state *s, int lcodes, int dcodes,
+                              int blcodes));
+local void compress_block OF((deflate_state *s, ct_data *ltree,
+                              ct_data *dtree));
+local void set_data_type  OF((deflate_state *s));
+local unsigned bi_reverse OF((unsigned value, int length));
+local void bi_windup      OF((deflate_state *s));
+local void bi_flush       OF((deflate_state *s));
+local void copy_block     OF((deflate_state *s, charf *buf, unsigned len,
+                              int header));
+
+#ifdef GEN_TREES_H
+local void gen_trees_header OF((void));
+#endif
+
+#ifndef DEBUG
+#  define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
+   /* Send a code of the given tree. c and tree must not have side effects */
+
+#else /* DEBUG */
+#  define send_code(s, c, tree) \
+     { if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
+       send_bits(s, tree[c].Code, tree[c].Len); }
+#endif
+
+/* ===========================================================================
+ * Output a short LSB first on the stream.
+ * IN assertion: there is enough room in pendingBuf.
+ */
+#define put_short(s, w) { \
+    put_byte(s, (uch)((w) & 0xff)); \
+    put_byte(s, (uch)((ush)(w) >> 8)); \
+}
+
+/* ===========================================================================
+ * Send a value on a given number of bits.
+ * IN assertion: length <= 16 and value fits in length bits.
+ */
+#ifdef DEBUG
+local void send_bits      OF((deflate_state *s, int value, int length));
+
+local void send_bits(s, value, length)
+    deflate_state *s;
+    int value;  /* value to send */
+    int length; /* number of bits */
+{
+    Tracevv((stderr," l %2d v %4x ", length, value));
+    Assert(length > 0 && length <= 15, "invalid length");
+    s->bits_sent += (ulg)length;
+
+    /* If not enough room in bi_buf, use (valid) bits from bi_buf and
+     * (16 - bi_valid) bits from value, leaving (width - (16-bi_valid))
+     * unused bits in value.
+     */
+    if (s->bi_valid > (int)Buf_size - length) {
+        s->bi_buf |= (value << s->bi_valid);
+        put_short(s, s->bi_buf);
+        s->bi_buf = (ush)value >> (Buf_size - s->bi_valid);
+        s->bi_valid += length - Buf_size;
+    } else {
+        s->bi_buf |= value << s->bi_valid;
+        s->bi_valid += length;
+    }
+}
+#else /* !DEBUG */
+
+#define send_bits(s, value, length) \
+{ int len = length;\
+  if (s->bi_valid > (int)Buf_size - len) {\
+    int val = value;\
+    s->bi_buf |= (val << s->bi_valid);\
+    put_short(s, s->bi_buf);\
+    s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
+    s->bi_valid += len - Buf_size;\
+  } else {\
+    s->bi_buf |= (value) << s->bi_valid;\
+    s->bi_valid += len;\
+  }\
+}
+#endif /* DEBUG */
+
+
+#define MAX(a,b) (a >= b ? a : b)
+/* the arguments must not have side effects */
+
+/* ===========================================================================
+ * Initialize the various 'constant' tables.
+ */
+local void tr_static_init()
+{
+#if defined(GEN_TREES_H) || !defined(STDC)
+    static int static_init_done = 0;
+    int n;        /* iterates over tree elements */
+    int bits;     /* bit counter */
+    int length;   /* length value */
+    int code;     /* code value */
+    int dist;     /* distance index */
+    ush bl_count[MAX_BITS+1];
+    /* number of codes at each bit length for an optimal tree */
+
+    if (static_init_done) return;
+
+    /* For some embedded targets, global variables are not initialized: */
+    static_l_desc.static_tree = static_ltree;
+    static_l_desc.extra_bits = extra_lbits;
+    static_d_desc.static_tree = static_dtree;
+    static_d_desc.extra_bits = extra_dbits;
+    static_bl_desc.extra_bits = extra_blbits;
+
+    /* Initialize the mapping length (0..255) -> length code (0..28) */
+    length = 0;
+    for (code = 0; code < LENGTH_CODES-1; code++) {
+        base_length[code] = length;
+        for (n = 0; n < (1<<extra_lbits[code]); n++) {
+            _length_code[length++] = (uch)code;
+        }
+    }
+    Assert (length == 256, "tr_static_init: length != 256");
+    /* Note that the length 255 (match length 258) can be represented
+     * in two different ways: code 284 + 5 bits or code 285, so we
+     * overwrite length_code[255] to use the best encoding:
+     */
+    _length_code[length-1] = (uch)code;
+
+    /* Initialize the mapping dist (0..32K) -> dist code (0..29) */
+    dist = 0;
+    for (code = 0 ; code < 16; code++) {
+        base_dist[code] = dist;
+        for (n = 0; n < (1<<extra_dbits[code]); n++) {
+            _dist_code[dist++] = (uch)code;
+        }
+    }
+    Assert (dist == 256, "tr_static_init: dist != 256");
+    dist >>= 7; /* from now on, all distances are divided by 128 */
+    for ( ; code < D_CODES; code++) {
+        base_dist[code] = dist << 7;
+        for (n = 0; n < (1<<(extra_dbits[code]-7)); n++) {
+            _dist_code[256 + dist++] = (uch)code;
+        }
+    }
+    Assert (dist == 256, "tr_static_init: 256+dist != 512");
+
+    /* Construct the codes of the static literal tree */
+    for (bits = 0; bits <= MAX_BITS; bits++) bl_count[bits] = 0;
+    n = 0;
+    while (n <= 143) static_ltree[n++].Len = 8, bl_count[8]++;
+    while (n <= 255) static_ltree[n++].Len = 9, bl_count[9]++;
+    while (n <= 279) static_ltree[n++].Len = 7, bl_count[7]++;
+    while (n <= 287) static_ltree[n++].Len = 8, bl_count[8]++;
+    /* Codes 286 and 287 do not exist, but we must include them in the
+     * tree construction to get a canonical Huffman tree (longest code
+     * all ones)
+     */
+    gen_codes((ct_data *)static_ltree, L_CODES+1, bl_count);
+
+    /* The static distance tree is trivial: */
+    for (n = 0; n < D_CODES; n++) {
+        static_dtree[n].Len = 5;
+        static_dtree[n].Code = bi_reverse((unsigned)n, 5);
+    }
+    static_init_done = 1;
+
+#  ifdef GEN_TREES_H
+    gen_trees_header();
+#  endif
+#endif /* defined(GEN_TREES_H) || !defined(STDC) */
+}
+
+/* ===========================================================================
+ * Genererate the file trees.h describing the static trees.
+ */
+#ifdef GEN_TREES_H
+#  ifndef DEBUG
+#    include <stdio.h>
+#  endif
+
+#  define SEPARATOR(i, last, width) \
+      ((i) == (last)? "\n};\n\n" :    \
+       ((i) % (width) == (width)-1 ? ",\n" : ", "))
+
+void gen_trees_header()
+{
+    FILE *header = fopen("trees.h", "w");
+    int i;
+
+    Assert (header != NULL, "Can't open trees.h");
+    fprintf(header,
+	    "/* header created automatically with -DGEN_TREES_H */\n\n");
+
+    fprintf(header, "local const ct_data static_ltree[L_CODES+2] = {\n");
+    for (i = 0; i < L_CODES+2; i++) {
+	fprintf(header, "{{%3u},{%3u}}%s", static_ltree[i].Code,
+		static_ltree[i].Len, SEPARATOR(i, L_CODES+1, 5));
+    }
+
+    fprintf(header, "local const ct_data static_dtree[D_CODES] = {\n");
+    for (i = 0; i < D_CODES; i++) {
+	fprintf(header, "{{%2u},{%2u}}%s", static_dtree[i].Code,
+		static_dtree[i].Len, SEPARATOR(i, D_CODES-1, 5));
+    }
+
+    fprintf(header, "const uch _dist_code[DIST_CODE_LEN] = {\n");
+    for (i = 0; i < DIST_CODE_LEN; i++) {
+	fprintf(header, "%2u%s", _dist_code[i],
+		SEPARATOR(i, DIST_CODE_LEN-1, 20));
+    }
+
+    fprintf(header, "const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {\n");
+    for (i = 0; i < MAX_MATCH-MIN_MATCH+1; i++) {
+	fprintf(header, "%2u%s", _length_code[i],
+		SEPARATOR(i, MAX_MATCH-MIN_MATCH, 20));
+    }
+
+    fprintf(header, "local const int base_length[LENGTH_CODES] = {\n");
+    for (i = 0; i < LENGTH_CODES; i++) {
+	fprintf(header, "%1u%s", base_length[i],
+		SEPARATOR(i, LENGTH_CODES-1, 20));
+    }
+
+    fprintf(header, "local const int base_dist[D_CODES] = {\n");
+    for (i = 0; i < D_CODES; i++) {
+	fprintf(header, "%5u%s", base_dist[i],
+		SEPARATOR(i, D_CODES-1, 10));
+    }
+
+    fclose(header);
+}
+#endif /* GEN_TREES_H */
+
+/* ===========================================================================
+ * Initialize the tree data structures for a new zlib stream.
+ */
+void _tr_init(s)
+    deflate_state *s;
+{
+    tr_static_init();
+
+    s->l_desc.dyn_tree = s->dyn_ltree;
+    s->l_desc.stat_desc = &static_l_desc;
+
+    s->d_desc.dyn_tree = s->dyn_dtree;
+    s->d_desc.stat_desc = &static_d_desc;
+
+    s->bl_desc.dyn_tree = s->bl_tree;
+    s->bl_desc.stat_desc = &static_bl_desc;
+
+    s->bi_buf = 0;
+    s->bi_valid = 0;
+    s->last_eob_len = 8; /* enough lookahead for inflate */
+#ifdef DEBUG
+    s->compressed_len = 0L;
+    s->bits_sent = 0L;
+#endif
+
+    /* Initialize the first block of the first file: */
+    init_block(s);
+}
+
+/* ===========================================================================
+ * Initialize a new block.
+ */
+local void init_block(s)
+    deflate_state *s;
+{
+    int n; /* iterates over tree elements */
+
+    /* Initialize the trees. */
+    for (n = 0; n < L_CODES;  n++) s->dyn_ltree[n].Freq = 0;
+    for (n = 0; n < D_CODES;  n++) s->dyn_dtree[n].Freq = 0;
+    for (n = 0; n < BL_CODES; n++) s->bl_tree[n].Freq = 0;
+
+    s->dyn_ltree[END_BLOCK].Freq = 1;
+    s->opt_len = s->static_len = 0L;
+    s->last_lit = s->matches = 0;
+}
+
+#define SMALLEST 1
+/* Index within the heap array of least frequent node in the Huffman tree */
+
+
+/* ===========================================================================
+ * Remove the smallest element from the heap and recreate the heap with
+ * one less element. Updates heap and heap_len.
+ */
+#define pqremove(s, tree, top) \
+{\
+    top = s->heap[SMALLEST]; \
+    s->heap[SMALLEST] = s->heap[s->heap_len--]; \
+    pqdownheap(s, tree, SMALLEST); \
+}
+
+/* ===========================================================================
+ * Compares to subtrees, using the tree depth as tie breaker when
+ * the subtrees have equal frequency. This minimizes the worst case length.
+ */
+#define smaller(tree, n, m, depth) \
+   (tree[n].Freq < tree[m].Freq || \
+   (tree[n].Freq == tree[m].Freq && depth[n] <= depth[m]))
+
+/* ===========================================================================
+ * Restore the heap property by moving down the tree starting at node k,
+ * exchanging a node with the smallest of its two sons if necessary, stopping
+ * when the heap property is re-established (each father smaller than its
+ * two sons).
+ */
+local void pqdownheap(s, tree, k)
+    deflate_state *s;
+    ct_data *tree;  /* the tree to restore */
+    int k;               /* node to move down */
+{
+    int v = s->heap[k];
+    int j = k << 1;  /* left son of k */
+    while (j <= s->heap_len) {
+        /* Set j to the smallest of the two sons: */
+        if (j < s->heap_len &&
+            smaller(tree, s->heap[j+1], s->heap[j], s->depth)) {
+            j++;
+        }
+        /* Exit if v is smaller than both sons */
+        if (smaller(tree, v, s->heap[j], s->depth)) break;
+
+        /* Exchange v with the smallest son */
+        s->heap[k] = s->heap[j];  k = j;
+
+        /* And continue down the tree, setting j to the left son of k */
+        j <<= 1;
+    }
+    s->heap[k] = v;
+}
+
+/* ===========================================================================
+ * Compute the optimal bit lengths for a tree and update the total bit length
+ * for the current block.
+ * IN assertion: the fields freq and dad are set, heap[heap_max] and
+ *    above are the tree nodes sorted by increasing frequency.
+ * OUT assertions: the field len is set to the optimal bit length, the
+ *     array bl_count contains the frequencies for each bit length.
+ *     The length opt_len is updated; static_len is also updated if stree is
+ *     not null.
+ */
+local void gen_bitlen(s, desc)
+    deflate_state *s;
+    tree_desc *desc;    /* the tree descriptor */
+{
+    ct_data *tree        = desc->dyn_tree;
+    int max_code         = desc->max_code;
+    const ct_data *stree = desc->stat_desc->static_tree;
+    const intf *extra    = desc->stat_desc->extra_bits;
+    int base             = desc->stat_desc->extra_base;
+    int max_length       = desc->stat_desc->max_length;
+    int h;              /* heap index */
+    int n, m;           /* iterate over the tree elements */
+    int bits;           /* bit length */
+    int xbits;          /* extra bits */
+    ush f;              /* frequency */
+    int overflow = 0;   /* number of elements with bit length too large */
+
+    for (bits = 0; bits <= MAX_BITS; bits++) s->bl_count[bits] = 0;
+
+    /* In a first pass, compute the optimal bit lengths (which may
+     * overflow in the case of the bit length tree).
+     */
+    tree[s->heap[s->heap_max]].Len = 0; /* root of the heap */
+
+    for (h = s->heap_max+1; h < HEAP_SIZE; h++) {
+        n = s->heap[h];
+        bits = tree[tree[n].Dad].Len + 1;
+        if (bits > max_length) bits = max_length, overflow++;
+        tree[n].Len = (ush)bits;
+        /* We overwrite tree[n].Dad which is no longer needed */
+
+        if (n > max_code) continue; /* not a leaf node */
+
+        s->bl_count[bits]++;
+        xbits = 0;
+        if (n >= base) xbits = extra[n-base];
+        f = tree[n].Freq;
+        s->opt_len += (ulg)f * (bits + xbits);
+        if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits);
+    }
+    if (overflow == 0) return;
+
+    Trace((stderr,"\nbit length overflow\n"));
+    /* This happens for example on obj2 and pic of the Calgary corpus */
+
+    /* Find the first bit length which could increase: */
+    do {
+        bits = max_length-1;
+        while (s->bl_count[bits] == 0) bits--;
+        s->bl_count[bits]--;      /* move one leaf down the tree */
+        s->bl_count[bits+1] += 2; /* move one overflow item as its brother */
+        s->bl_count[max_length]--;
+        /* The brother of the overflow item also moves one step up,
+         * but this does not affect bl_count[max_length]
+         */
+        overflow -= 2;
+    } while (overflow > 0);
+
+    /* Now recompute all bit lengths, scanning in increasing frequency.
+     * h is still equal to HEAP_SIZE. (It is simpler to reconstruct all
+     * lengths instead of fixing only the wrong ones. This idea is taken
+     * from 'ar' written by Haruhiko Okumura.)
+     */
+    for (bits = max_length; bits != 0; bits--) {
+        n = s->bl_count[bits];
+        while (n != 0) {
+            m = s->heap[--h];
+            if (m > max_code) continue;
+            if (tree[m].Len != (unsigned) bits) {
+                Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
+                s->opt_len += ((long)bits - (long)tree[m].Len)
+                              *(long)tree[m].Freq;
+                tree[m].Len = (ush)bits;
+            }
+            n--;
+        }
+    }
+}
+
+/* ===========================================================================
+ * Generate the codes for a given tree and bit counts (which need not be
+ * optimal).
+ * IN assertion: the array bl_count contains the bit length statistics for
+ * the given tree and the field len is set for all tree elements.
+ * OUT assertion: the field code is set for all tree elements of non
+ *     zero code length.
+ */
+local void gen_codes (tree, max_code, bl_count)
+    ct_data *tree;             /* the tree to decorate */
+    int max_code;              /* largest code with non zero frequency */
+    ushf *bl_count;            /* number of codes at each bit length */
+{
+    ush next_code[MAX_BITS+1]; /* next code value for each bit length */
+    ush code = 0;              /* running code value */
+    int bits;                  /* bit index */
+    int n;                     /* code index */
+
+    /* The distribution counts are first used to generate the code values
+     * without bit reversal.
+     */
+    for (bits = 1; bits <= MAX_BITS; bits++) {
+        next_code[bits] = code = (code + bl_count[bits-1]) << 1;
+    }
+    /* Check that the bit counts in bl_count are consistent. The last code
+     * must be all ones.
+     */
+    Assert (code + bl_count[MAX_BITS]-1 == (1<<MAX_BITS)-1,
+            "inconsistent bit counts");
+    Tracev((stderr,"\ngen_codes: max_code %d ", max_code));
+
+    for (n = 0;  n <= max_code; n++) {
+        int len = tree[n].Len;
+        if (len == 0) continue;
+        /* Now reverse the bits */
+        tree[n].Code = bi_reverse(next_code[len]++, len);
+
+        Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
+             n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
+    }
+}
+
+/* ===========================================================================
+ * Construct one Huffman tree and assigns the code bit strings and lengths.
+ * Update the total bit length for the current block.
+ * IN assertion: the field freq is set for all tree elements.
+ * OUT assertions: the fields len and code are set to the optimal bit length
+ *     and corresponding code. The length opt_len is updated; static_len is
+ *     also updated if stree is not null. The field max_code is set.
+ */
+local void build_tree(s, desc)
+    deflate_state *s;
+    tree_desc *desc; /* the tree descriptor */
+{
+    ct_data *tree         = desc->dyn_tree;
+    const ct_data *stree  = desc->stat_desc->static_tree;
+    int elems             = desc->stat_desc->elems;
+    int n, m;          /* iterate over heap elements */
+    int max_code = -1; /* largest code with non zero frequency */
+    int node;          /* new node being created */
+
+    /* Construct the initial heap, with least frequent element in
+     * heap[SMALLEST]. The sons of heap[n] are heap[2*n] and heap[2*n+1].
+     * heap[0] is not used.
+     */
+    s->heap_len = 0, s->heap_max = HEAP_SIZE;
+
+    for (n = 0; n < elems; n++) {
+        if (tree[n].Freq != 0) {
+            s->heap[++(s->heap_len)] = max_code = n;
+            s->depth[n] = 0;
+        } else {
+            tree[n].Len = 0;
+        }
+    }
+
+    /* The pkzip format requires that at least one distance code exists,
+     * and that at least one bit should be sent even if there is only one
+     * possible code. So to avoid special checks later on we force at least
+     * two codes of non zero frequency.
+     */
+    while (s->heap_len < 2) {
+        node = s->heap[++(s->heap_len)] = (max_code < 2 ? ++max_code : 0);
+        tree[node].Freq = 1;
+        s->depth[node] = 0;
+        s->opt_len--; if (stree) s->static_len -= stree[node].Len;
+        /* node is 0 or 1 so it does not have extra bits */
+    }
+    desc->max_code = max_code;
+
+    /* The elements heap[heap_len/2+1 .. heap_len] are leaves of the tree,
+     * establish sub-heaps of increasing lengths:
+     */
+    for (n = s->heap_len/2; n >= 1; n--) pqdownheap(s, tree, n);
+
+    /* Construct the Huffman tree by repeatedly combining the least two
+     * frequent nodes.
+     */
+    node = elems;              /* next internal node of the tree */
+    do {
+        pqremove(s, tree, n);  /* n = node of least frequency */
+        m = s->heap[SMALLEST]; /* m = node of next least frequency */
+
+        s->heap[--(s->heap_max)] = n; /* keep the nodes sorted by frequency */
+        s->heap[--(s->heap_max)] = m;
+
+        /* Create a new node father of n and m */
+        tree[node].Freq = tree[n].Freq + tree[m].Freq;
+        s->depth[node] = (uch) (MAX(s->depth[n], s->depth[m]) + 1);
+        tree[n].Dad = tree[m].Dad = (ush)node;
+#ifdef DUMP_BL_TREE
+        if (tree == s->bl_tree) {
+            fprintf(stderr,"\nnode %d(%d), sons %d(%d) %d(%d)",
+                    node, tree[node].Freq, n, tree[n].Freq, m, tree[m].Freq);
+        }
+#endif
+        /* and insert the new node in the heap */
+        s->heap[SMALLEST] = node++;
+        pqdownheap(s, tree, SMALLEST);
+
+    } while (s->heap_len >= 2);
+
+    s->heap[--(s->heap_max)] = s->heap[SMALLEST];
+
+    /* At this point, the fields freq and dad are set. We can now
+     * generate the bit lengths.
+     */
+    gen_bitlen(s, (tree_desc *)desc);
+
+    /* The field len is now set, we can generate the bit codes */
+    gen_codes ((ct_data *)tree, max_code, s->bl_count);
+}
+
+/* ===========================================================================
+ * Scan a literal or distance tree to determine the frequencies of the codes
+ * in the bit length tree.
+ */
+local void scan_tree (s, tree, max_code)
+    deflate_state *s;
+    ct_data *tree;   /* the tree to be scanned */
+    int max_code;    /* and its largest code of non zero frequency */
+{
+    int n;                     /* iterates over all tree elements */
+    int prevlen = -1;          /* last emitted length */
+    int curlen;                /* length of current code */
+    int nextlen = tree[0].Len; /* length of next code */
+    int count = 0;             /* repeat count of the current code */
+    int max_count = 7;         /* max repeat count */
+    int min_count = 4;         /* min repeat count */
+
+    if (nextlen == 0) max_count = 138, min_count = 3;
+    tree[max_code+1].Len = (ush)0xffff; /* guard */
+
+    for (n = 0; n <= max_code; n++) {
+        curlen = nextlen; nextlen = tree[n+1].Len;
+        if (++count < max_count && curlen == nextlen) {
+            continue;
+        } else if (count < min_count) {
+            s->bl_tree[curlen].Freq += count;
+        } else if (curlen != 0) {
+            if (curlen != prevlen) s->bl_tree[curlen].Freq++;
+            s->bl_tree[REP_3_6].Freq++;
+        } else if (count <= 10) {
+            s->bl_tree[REPZ_3_10].Freq++;
+        } else {
+            s->bl_tree[REPZ_11_138].Freq++;
+        }
+        count = 0; prevlen = curlen;
+        if (nextlen == 0) {
+            max_count = 138, min_count = 3;
+        } else if (curlen == nextlen) {
+            max_count = 6, min_count = 3;
+        } else {
+            max_count = 7, min_count = 4;
+        }
+    }
+}
+
+/* ===========================================================================
+ * Send a literal or distance tree in compressed form, using the codes in
+ * bl_tree.
+ */
+local void send_tree (s, tree, max_code)
+    deflate_state *s;
+    ct_data *tree; /* the tree to be scanned */
+    int max_code;       /* and its largest code of non zero frequency */
+{
+    int n;                     /* iterates over all tree elements */
+    int prevlen = -1;          /* last emitted length */
+    int curlen;                /* length of current code */
+    int nextlen = tree[0].Len; /* length of next code */
+    int count = 0;             /* repeat count of the current code */
+    int max_count = 7;         /* max repeat count */
+    int min_count = 4;         /* min repeat count */
+
+    /* tree[max_code+1].Len = -1; */  /* guard already set */
+    if (nextlen == 0) max_count = 138, min_count = 3;
+
+    for (n = 0; n <= max_code; n++) {
+        curlen = nextlen; nextlen = tree[n+1].Len;
+        if (++count < max_count && curlen == nextlen) {
+            continue;
+        } else if (count < min_count) {
+            do { send_code(s, curlen, s->bl_tree); } while (--count != 0);
+
+        } else if (curlen != 0) {
+            if (curlen != prevlen) {
+                send_code(s, curlen, s->bl_tree); count--;
+            }
+            Assert(count >= 3 && count <= 6, " 3_6?");
+            send_code(s, REP_3_6, s->bl_tree); send_bits(s, count-3, 2);
+
+        } else if (count <= 10) {
+            send_code(s, REPZ_3_10, s->bl_tree); send_bits(s, count-3, 3);
+
+        } else {
+            send_code(s, REPZ_11_138, s->bl_tree); send_bits(s, count-11, 7);
+        }
+        count = 0; prevlen = curlen;
+        if (nextlen == 0) {
+            max_count = 138, min_count = 3;
+        } else if (curlen == nextlen) {
+            max_count = 6, min_count = 3;
+        } else {
+            max_count = 7, min_count = 4;
+        }
+    }
+}
+
+/* ===========================================================================
+ * Construct the Huffman tree for the bit lengths and return the index in
+ * bl_order of the last bit length code to send.
+ */
+local int build_bl_tree(s)
+    deflate_state *s;
+{
+    int max_blindex;  /* index of last bit length code of non zero freq */
+
+    /* Determine the bit length frequencies for literal and distance trees */
+    scan_tree(s, (ct_data *)s->dyn_ltree, s->l_desc.max_code);
+    scan_tree(s, (ct_data *)s->dyn_dtree, s->d_desc.max_code);
+
+    /* Build the bit length tree: */
+    build_tree(s, (tree_desc *)(&(s->bl_desc)));
+    /* opt_len now includes the length of the tree representations, except
+     * the lengths of the bit lengths codes and the 5+5+4 bits for the counts.
+     */
+
+    /* Determine the number of bit length codes to send. The pkzip format
+     * requires that at least 4 bit length codes be sent. (appnote.txt says
+     * 3 but the actual value used is 4.)
+     */
+    for (max_blindex = BL_CODES-1; max_blindex >= 3; max_blindex--) {
+        if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
+    }
+    /* Update opt_len to include the bit length tree and counts */
+    s->opt_len += 3*(max_blindex+1) + 5+5+4;
+    Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
+            s->opt_len, s->static_len));
+
+    return max_blindex;
+}
+
+/* ===========================================================================
+ * Send the header for a block using dynamic Huffman trees: the counts, the
+ * lengths of the bit length codes, the literal tree and the distance tree.
+ * IN assertion: lcodes >= 257, dcodes >= 1, blcodes >= 4.
+ */
+local void send_all_trees(s, lcodes, dcodes, blcodes)
+    deflate_state *s;
+    int lcodes, dcodes, blcodes; /* number of codes for each tree */
+{
+    int rank;                    /* index in bl_order */
+
+    Assert (lcodes >= 257 && dcodes >= 1 && blcodes >= 4, "not enough codes");
+    Assert (lcodes <= L_CODES && dcodes <= D_CODES && blcodes <= BL_CODES,
+            "too many codes");
+    Tracev((stderr, "\nbl counts: "));
+    send_bits(s, lcodes-257, 5); /* not +255 as stated in appnote.txt */
+    send_bits(s, dcodes-1,   5);
+    send_bits(s, blcodes-4,  4); /* not -3 as stated in appnote.txt */
+    for (rank = 0; rank < blcodes; rank++) {
+        Tracev((stderr, "\nbl code %2d ", bl_order[rank]));
+        send_bits(s, s->bl_tree[bl_order[rank]].Len, 3);
+    }
+    Tracev((stderr, "\nbl tree: sent %ld", s->bits_sent));
+
+    send_tree(s, (ct_data *)s->dyn_ltree, lcodes-1); /* literal tree */
+    Tracev((stderr, "\nlit tree: sent %ld", s->bits_sent));
+
+    send_tree(s, (ct_data *)s->dyn_dtree, dcodes-1); /* distance tree */
+    Tracev((stderr, "\ndist tree: sent %ld", s->bits_sent));
+}
+
+/* ===========================================================================
+ * Send a stored block
+ */
+void _tr_stored_block(s, buf, stored_len, eof)
+    deflate_state *s;
+    charf *buf;       /* input block */
+    ulg stored_len;   /* length of input block */
+    int eof;          /* true if this is the last block for a file */
+{
+    send_bits(s, (STORED_BLOCK<<1)+eof, 3);  /* send block type */
+#ifdef DEBUG
+    s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
+    s->compressed_len += (stored_len + 4) << 3;
+#endif
+    copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
+}
+
+/* ===========================================================================
+ * Send one empty static block to give enough lookahead for inflate.
+ * This takes 10 bits, of which 7 may remain in the bit buffer.
+ * The current inflate code requires 9 bits of lookahead. If the
+ * last two codes for the previous block (real code plus EOB) were coded
+ * on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
+ * the last real code. In this case we send two empty static blocks instead
+ * of one. (There are no problems if the previous block is stored or fixed.)
+ * To simplify the code, we assume the worst case of last real code encoded
+ * on one bit only.
+ */
+void _tr_align(s)
+    deflate_state *s;
+{
+    send_bits(s, STATIC_TREES<<1, 3);
+    send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
+    s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
+#endif
+    bi_flush(s);
+    /* Of the 10 bits for the empty block, we have already sent
+     * (10 - bi_valid) bits. The lookahead for the last real code (before
+     * the EOB of the previous block) was thus at least one plus the length
+     * of the EOB plus what we have just sent of the empty static block.
+     */
+    if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
+        send_bits(s, STATIC_TREES<<1, 3);
+        send_code(s, END_BLOCK, static_ltree);
+#ifdef DEBUG
+        s->compressed_len += 10L;
+#endif
+        bi_flush(s);
+    }
+    s->last_eob_len = 7;
+}
+
+/* ===========================================================================
+ * Determine the best encoding for the current block: dynamic trees, static
+ * trees or store, and output the encoded block to the zip file.
+ */
+void _tr_flush_block(s, buf, stored_len, eof)
+    deflate_state *s;
+    charf *buf;       /* input block, or NULL if too old */
+    ulg stored_len;   /* length of input block */
+    int eof;          /* true if this is the last block for a file */
+{
+    ulg opt_lenb, static_lenb; /* opt_len and static_len in bytes */
+    int max_blindex = 0;  /* index of last bit length code of non zero freq */
+
+    /* Build the Huffman trees unless a stored block is forced */
+    if (s->level > 0) {
+
+	 /* Check if the file is ascii or binary */
+	if (s->data_type == Z_UNKNOWN) set_data_type(s);
+
+	/* Construct the literal and distance trees */
+	build_tree(s, (tree_desc *)(&(s->l_desc)));
+	Tracev((stderr, "\nlit data: dyn %ld, stat %ld", s->opt_len,
+		s->static_len));
+
+	build_tree(s, (tree_desc *)(&(s->d_desc)));
+	Tracev((stderr, "\ndist data: dyn %ld, stat %ld", s->opt_len,
+		s->static_len));
+	/* At this point, opt_len and static_len are the total bit lengths of
+	 * the compressed block data, excluding the tree representations.
+	 */
+
+	/* Build the bit length tree for the above two trees, and get the index
+	 * in bl_order of the last bit length code to send.
+	 */
+	max_blindex = build_bl_tree(s);
+
+	/* Determine the best encoding. Compute first the block length in bytes*/
+	opt_lenb = (s->opt_len+3+7)>>3;
+	static_lenb = (s->static_len+3+7)>>3;
+
+	Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
+		opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
+		s->last_lit));
+
+	if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
+
+    } else {
+        Assert(buf != (char*)0, "lost buf");
+	opt_lenb = static_lenb = stored_len + 5; /* force a stored block */
+    }
+
+#ifdef FORCE_STORED
+    if (buf != (char*)0) { /* force stored block */
+#else
+    if (stored_len+4 <= opt_lenb && buf != (char*)0) {
+                       /* 4: two words for the lengths */
+#endif
+        /* The test buf != NULL is only necessary if LIT_BUFSIZE > WSIZE.
+         * Otherwise we can't have processed more than WSIZE input bytes since
+         * the last block flush, because compression would have been
+         * successful. If LIT_BUFSIZE <= WSIZE, it is never too late to
+         * transform a block into a stored block.
+         */
+        _tr_stored_block(s, buf, stored_len, eof);
+
+#ifdef FORCE_STATIC
+    } else if (static_lenb >= 0) { /* force static trees */
+#else
+    } else if (static_lenb == opt_lenb) {
+#endif
+        send_bits(s, (STATIC_TREES<<1)+eof, 3);
+        compress_block(s, (ct_data *)static_ltree, (ct_data *)static_dtree);
+#ifdef DEBUG
+        s->compressed_len += 3 + s->static_len;
+#endif
+    } else {
+        send_bits(s, (DYN_TREES<<1)+eof, 3);
+        send_all_trees(s, s->l_desc.max_code+1, s->d_desc.max_code+1,
+                       max_blindex+1);
+        compress_block(s, (ct_data *)s->dyn_ltree, (ct_data *)s->dyn_dtree);
+#ifdef DEBUG
+        s->compressed_len += 3 + s->opt_len;
+#endif
+    }
+    Assert (s->compressed_len == s->bits_sent, "bad compressed size");
+    /* The above check is made mod 2^32, for files larger than 512 MB
+     * and uLong implemented on 32 bits.
+     */
+    init_block(s);
+
+    if (eof) {
+        bi_windup(s);
+#ifdef DEBUG
+        s->compressed_len += 7;  /* align on byte boundary */
+#endif
+    }
+    Tracev((stderr,"\ncomprlen %lu(%lu) ", s->compressed_len>>3,
+           s->compressed_len-7*eof));
+}
+
+/* ===========================================================================
+ * Save the match info and tally the frequency counts. Return true if
+ * the current block must be flushed.
+ */
+int _tr_tally (s, dist, lc)
+    deflate_state *s;
+    unsigned dist;  /* distance of matched string */
+    unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
+{
+    s->d_buf[s->last_lit] = (ush)dist;
+    s->l_buf[s->last_lit++] = (uch)lc;
+    if (dist == 0) {
+        /* lc is the unmatched char */
+        s->dyn_ltree[lc].Freq++;
+    } else {
+        s->matches++;
+        /* Here, lc is the match length - MIN_MATCH */
+        dist--;             /* dist = match distance - 1 */
+        Assert((ush)dist < (ush)MAX_DIST(s) &&
+               (ush)lc <= (ush)(MAX_MATCH-MIN_MATCH) &&
+               (ush)d_code(dist) < (ush)D_CODES,  "_tr_tally: bad match");
+
+        s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
+        s->dyn_dtree[d_code(dist)].Freq++;
+    }
+
+#ifdef TRUNCATE_BLOCK
+    /* Try to guess if it is profitable to stop the current block here */
+    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
+        /* Compute an upper bound for the compressed length */
+        ulg out_length = (ulg)s->last_lit*8L;
+        ulg in_length = (ulg)((long)s->strstart - s->block_start);
+        int dcode;
+        for (dcode = 0; dcode < D_CODES; dcode++) {
+            out_length += (ulg)s->dyn_dtree[dcode].Freq *
+                (5L+extra_dbits[dcode]);
+        }
+        out_length >>= 3;
+        Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
+               s->last_lit, in_length, out_length,
+               100L - out_length*100L/in_length));
+        if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
+    }
+#endif
+    return (s->last_lit == s->lit_bufsize-1);
+    /* We avoid equality with lit_bufsize because of wraparound at 64K
+     * on 16 bit machines and because stored blocks are restricted to
+     * 64K-1 bytes.
+     */
+}
+
+/* ===========================================================================
+ * Send the block data compressed using the given Huffman trees
+ */
+local void compress_block(s, ltree, dtree)
+    deflate_state *s;
+    ct_data *ltree; /* literal tree */
+    ct_data *dtree; /* distance tree */
+{
+    unsigned dist;      /* distance of matched string */
+    int lc;             /* match length or unmatched char (if dist == 0) */
+    unsigned lx = 0;    /* running index in l_buf */
+    unsigned code;      /* the code to send */
+    int extra;          /* number of extra bits to send */
+
+    if (s->last_lit != 0) do {
+        dist = s->d_buf[lx];
+        lc = s->l_buf[lx++];
+        if (dist == 0) {
+            send_code(s, lc, ltree); /* send a literal byte */
+            Tracecv(isgraph(lc), (stderr," '%c' ", lc));
+        } else {
+            /* Here, lc is the match length - MIN_MATCH */
+            code = _length_code[lc];
+            send_code(s, code+LITERALS+1, ltree); /* send the length code */
+            extra = extra_lbits[code];
+            if (extra != 0) {
+                lc -= base_length[code];
+                send_bits(s, lc, extra);       /* send the extra length bits */
+            }
+            dist--; /* dist is now the match distance - 1 */
+            code = d_code(dist);
+            Assert (code < D_CODES, "bad d_code");
+
+            send_code(s, code, dtree);       /* send the distance code */
+            extra = extra_dbits[code];
+            if (extra != 0) {
+                dist -= base_dist[code];
+                send_bits(s, dist, extra);   /* send the extra distance bits */
+            }
+        } /* literal or match pair ? */
+
+        /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
+        Assert(s->pending < s->lit_bufsize + 2*lx, "pendingBuf overflow");
+
+    } while (lx < s->last_lit);
+
+    send_code(s, END_BLOCK, ltree);
+    s->last_eob_len = ltree[END_BLOCK].Len;
+}
+
+/* ===========================================================================
+ * Set the data type to ASCII or BINARY, using a crude approximation:
+ * binary if more than 20% of the bytes are <= 6 or >= 128, ascii otherwise.
+ * IN assertion: the fields freq of dyn_ltree are set and the total of all
+ * frequencies does not exceed 64K (to fit in an int on 16 bit machines).
+ */
+local void set_data_type(s)
+    deflate_state *s;
+{
+    int n = 0;
+    unsigned ascii_freq = 0;
+    unsigned bin_freq = 0;
+    while (n < 7)        bin_freq += s->dyn_ltree[n++].Freq;
+    while (n < 128)    ascii_freq += s->dyn_ltree[n++].Freq;
+    while (n < LITERALS) bin_freq += s->dyn_ltree[n++].Freq;
+    s->data_type = (Byte)(bin_freq > (ascii_freq >> 2) ? Z_BINARY : Z_ASCII);
+}
+
+/* ===========================================================================
+ * Reverse the first len bits of a code, using straightforward code (a faster
+ * method would use a table)
+ * IN assertion: 1 <= len <= 15
+ */
+local unsigned bi_reverse(code, len)
+    unsigned code; /* the value to invert */
+    int len;       /* its bit length */
+{
+    register unsigned res = 0;
+    do {
+        res |= code & 1;
+        code >>= 1, res <<= 1;
+    } while (--len > 0);
+    return res >> 1;
+}
+
+/* ===========================================================================
+ * Flush the bit buffer, keeping at most 7 bits in it.
+ */
+local void bi_flush(s)
+    deflate_state *s;
+{
+    if (s->bi_valid == 16) {
+        put_short(s, s->bi_buf);
+        s->bi_buf = 0;
+        s->bi_valid = 0;
+    } else if (s->bi_valid >= 8) {
+        put_byte(s, (Byte)s->bi_buf);
+        s->bi_buf >>= 8;
+        s->bi_valid -= 8;
+    }
+}
+
+/* ===========================================================================
+ * Flush the bit buffer and align the output on a byte boundary
+ */
+local void bi_windup(s)
+    deflate_state *s;
+{
+    if (s->bi_valid > 8) {
+        put_short(s, s->bi_buf);
+    } else if (s->bi_valid > 0) {
+        put_byte(s, (Byte)s->bi_buf);
+    }
+    s->bi_buf = 0;
+    s->bi_valid = 0;
+#ifdef DEBUG
+    s->bits_sent = (s->bits_sent+7) & ~7;
+#endif
+}
+
+/* ===========================================================================
+ * Copy a stored block, storing first the length and its
+ * one's complement if requested.
+ */
+local void copy_block(s, buf, len, header)
+    deflate_state *s;
+    charf    *buf;    /* the input data */
+    unsigned len;     /* its length */
+    int      header;  /* true if block header must be written */
+{
+    bi_windup(s);        /* align on byte boundary */
+    s->last_eob_len = 8; /* enough lookahead for inflate */
+
+    if (header) {
+        put_short(s, (ush)len);   
+        put_short(s, (ush)~len);
+#ifdef DEBUG
+        s->bits_sent += 2*16;
+#endif
+    }
+#ifdef DEBUG
+    s->bits_sent += (ulg)len<<3;
+#endif
+    while (len--) {
+        put_byte(s, *buf++);
+    }
+}
diff --git a/common/zlib/trees.h b/common/zlib/trees.h
new file mode 100644
index 00000000..72facf90
--- /dev/null
+++ b/common/zlib/trees.h
@@ -0,0 +1,128 @@
+/* header created automatically with -DGEN_TREES_H */
+
+local const ct_data static_ltree[L_CODES+2] = {
+{{ 12},{  8}}, {{140},{  8}}, {{ 76},{  8}}, {{204},{  8}}, {{ 44},{  8}},
+{{172},{  8}}, {{108},{  8}}, {{236},{  8}}, {{ 28},{  8}}, {{156},{  8}},
+{{ 92},{  8}}, {{220},{  8}}, {{ 60},{  8}}, {{188},{  8}}, {{124},{  8}},
+{{252},{  8}}, {{  2},{  8}}, {{130},{  8}}, {{ 66},{  8}}, {{194},{  8}},
+{{ 34},{  8}}, {{162},{  8}}, {{ 98},{  8}}, {{226},{  8}}, {{ 18},{  8}},
+{{146},{  8}}, {{ 82},{  8}}, {{210},{  8}}, {{ 50},{  8}}, {{178},{  8}},
+{{114},{  8}}, {{242},{  8}}, {{ 10},{  8}}, {{138},{  8}}, {{ 74},{  8}},
+{{202},{  8}}, {{ 42},{  8}}, {{170},{  8}}, {{106},{  8}}, {{234},{  8}},
+{{ 26},{  8}}, {{154},{  8}}, {{ 90},{  8}}, {{218},{  8}}, {{ 58},{  8}},
+{{186},{  8}}, {{122},{  8}}, {{250},{  8}}, {{  6},{  8}}, {{134},{  8}},
+{{ 70},{  8}}, {{198},{  8}}, {{ 38},{  8}}, {{166},{  8}}, {{102},{  8}},
+{{230},{  8}}, {{ 22},{  8}}, {{150},{  8}}, {{ 86},{  8}}, {{214},{  8}},
+{{ 54},{  8}}, {{182},{  8}}, {{118},{  8}}, {{246},{  8}}, {{ 14},{  8}},
+{{142},{  8}}, {{ 78},{  8}}, {{206},{  8}}, {{ 46},{  8}}, {{174},{  8}},
+{{110},{  8}}, {{238},{  8}}, {{ 30},{  8}}, {{158},{  8}}, {{ 94},{  8}},
+{{222},{  8}}, {{ 62},{  8}}, {{190},{  8}}, {{126},{  8}}, {{254},{  8}},
+{{  1},{  8}}, {{129},{  8}}, {{ 65},{  8}}, {{193},{  8}}, {{ 33},{  8}},
+{{161},{  8}}, {{ 97},{  8}}, {{225},{  8}}, {{ 17},{  8}}, {{145},{  8}},
+{{ 81},{  8}}, {{209},{  8}}, {{ 49},{  8}}, {{177},{  8}}, {{113},{  8}},
+{{241},{  8}}, {{  9},{  8}}, {{137},{  8}}, {{ 73},{  8}}, {{201},{  8}},
+{{ 41},{  8}}, {{169},{  8}}, {{105},{  8}}, {{233},{  8}}, {{ 25},{  8}},
+{{153},{  8}}, {{ 89},{  8}}, {{217},{  8}}, {{ 57},{  8}}, {{185},{  8}},
+{{121},{  8}}, {{249},{  8}}, {{  5},{  8}}, {{133},{  8}}, {{ 69},{  8}},
+{{197},{  8}}, {{ 37},{  8}}, {{165},{  8}}, {{101},{  8}}, {{229},{  8}},
+{{ 21},{  8}}, {{149},{  8}}, {{ 85},{  8}}, {{213},{  8}}, {{ 53},{  8}},
+{{181},{  8}}, {{117},{  8}}, {{245},{  8}}, {{ 13},{  8}}, {{141},{  8}},
+{{ 77},{  8}}, {{205},{  8}}, {{ 45},{  8}}, {{173},{  8}}, {{109},{  8}},
+{{237},{  8}}, {{ 29},{  8}}, {{157},{  8}}, {{ 93},{  8}}, {{221},{  8}},
+{{ 61},{  8}}, {{189},{  8}}, {{125},{  8}}, {{253},{  8}}, {{ 19},{  9}},
+{{275},{  9}}, {{147},{  9}}, {{403},{  9}}, {{ 83},{  9}}, {{339},{  9}},
+{{211},{  9}}, {{467},{  9}}, {{ 51},{  9}}, {{307},{  9}}, {{179},{  9}},
+{{435},{  9}}, {{115},{  9}}, {{371},{  9}}, {{243},{  9}}, {{499},{  9}},
+{{ 11},{  9}}, {{267},{  9}}, {{139},{  9}}, {{395},{  9}}, {{ 75},{  9}},
+{{331},{  9}}, {{203},{  9}}, {{459},{  9}}, {{ 43},{  9}}, {{299},{  9}},
+{{171},{  9}}, {{427},{  9}}, {{107},{  9}}, {{363},{  9}}, {{235},{  9}},
+{{491},{  9}}, {{ 27},{  9}}, {{283},{  9}}, {{155},{  9}}, {{411},{  9}},
+{{ 91},{  9}}, {{347},{  9}}, {{219},{  9}}, {{475},{  9}}, {{ 59},{  9}},
+{{315},{  9}}, {{187},{  9}}, {{443},{  9}}, {{123},{  9}}, {{379},{  9}},
+{{251},{  9}}, {{507},{  9}}, {{  7},{  9}}, {{263},{  9}}, {{135},{  9}},
+{{391},{  9}}, {{ 71},{  9}}, {{327},{  9}}, {{199},{  9}}, {{455},{  9}},
+{{ 39},{  9}}, {{295},{  9}}, {{167},{  9}}, {{423},{  9}}, {{103},{  9}},
+{{359},{  9}}, {{231},{  9}}, {{487},{  9}}, {{ 23},{  9}}, {{279},{  9}},
+{{151},{  9}}, {{407},{  9}}, {{ 87},{  9}}, {{343},{  9}}, {{215},{  9}},
+{{471},{  9}}, {{ 55},{  9}}, {{311},{  9}}, {{183},{  9}}, {{439},{  9}},
+{{119},{  9}}, {{375},{  9}}, {{247},{  9}}, {{503},{  9}}, {{ 15},{  9}},
+{{271},{  9}}, {{143},{  9}}, {{399},{  9}}, {{ 79},{  9}}, {{335},{  9}},
+{{207},{  9}}, {{463},{  9}}, {{ 47},{  9}}, {{303},{  9}}, {{175},{  9}},
+{{431},{  9}}, {{111},{  9}}, {{367},{  9}}, {{239},{  9}}, {{495},{  9}},
+{{ 31},{  9}}, {{287},{  9}}, {{159},{  9}}, {{415},{  9}}, {{ 95},{  9}},
+{{351},{  9}}, {{223},{  9}}, {{479},{  9}}, {{ 63},{  9}}, {{319},{  9}},
+{{191},{  9}}, {{447},{  9}}, {{127},{  9}}, {{383},{  9}}, {{255},{  9}},
+{{511},{  9}}, {{  0},{  7}}, {{ 64},{  7}}, {{ 32},{  7}}, {{ 96},{  7}},
+{{ 16},{  7}}, {{ 80},{  7}}, {{ 48},{  7}}, {{112},{  7}}, {{  8},{  7}},
+{{ 72},{  7}}, {{ 40},{  7}}, {{104},{  7}}, {{ 24},{  7}}, {{ 88},{  7}},
+{{ 56},{  7}}, {{120},{  7}}, {{  4},{  7}}, {{ 68},{  7}}, {{ 36},{  7}},
+{{100},{  7}}, {{ 20},{  7}}, {{ 84},{  7}}, {{ 52},{  7}}, {{116},{  7}},
+{{  3},{  8}}, {{131},{  8}}, {{ 67},{  8}}, {{195},{  8}}, {{ 35},{  8}},
+{{163},{  8}}, {{ 99},{  8}}, {{227},{  8}}
+};
+
+local const ct_data static_dtree[D_CODES] = {
+{{ 0},{ 5}}, {{16},{ 5}}, {{ 8},{ 5}}, {{24},{ 5}}, {{ 4},{ 5}},
+{{20},{ 5}}, {{12},{ 5}}, {{28},{ 5}}, {{ 2},{ 5}}, {{18},{ 5}},
+{{10},{ 5}}, {{26},{ 5}}, {{ 6},{ 5}}, {{22},{ 5}}, {{14},{ 5}},
+{{30},{ 5}}, {{ 1},{ 5}}, {{17},{ 5}}, {{ 9},{ 5}}, {{25},{ 5}},
+{{ 5},{ 5}}, {{21},{ 5}}, {{13},{ 5}}, {{29},{ 5}}, {{ 3},{ 5}},
+{{19},{ 5}}, {{11},{ 5}}, {{27},{ 5}}, {{ 7},{ 5}}, {{23},{ 5}}
+};
+
+const uch _dist_code[DIST_CODE_LEN] = {
+ 0,  1,  2,  3,  4,  4,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7,  8,  8,  8,  8,
+ 8,  8,  8,  8,  9,  9,  9,  9,  9,  9,  9,  9, 10, 10, 10, 10, 10, 10, 10, 10,
+10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
+12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13,
+13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,
+14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,
+15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15,  0,  0, 16, 17,
+18, 18, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 22,
+23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28,
+28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29,
+29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29
+};
+
+const uch _length_code[MAX_MATCH-MIN_MATCH+1]= {
+ 0,  1,  2,  3,  4,  5,  6,  7,  8,  8,  9,  9, 10, 10, 11, 11, 12, 12, 12, 12,
+13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16,
+17, 17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18, 19, 19, 19, 19,
+19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
+21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22,
+22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23,
+23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24,
+25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,
+25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26,
+26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28
+};
+
+local const int base_length[LENGTH_CODES] = {
+0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56,
+64, 80, 96, 112, 128, 160, 192, 224, 0
+};
+
+local const int base_dist[D_CODES] = {
+    0,     1,     2,     3,     4,     6,     8,    12,    16,    24,
+   32,    48,    64,    96,   128,   192,   256,   384,   512,   768,
+ 1024,  1536,  2048,  3072,  4096,  6144,  8192, 12288, 16384, 24576
+};
+
diff --git a/common/zlib/uncompr.c b/common/zlib/uncompr.c
new file mode 100644
index 00000000..d8a4a699
--- /dev/null
+++ b/common/zlib/uncompr.c
@@ -0,0 +1,58 @@
+/* uncompr.c -- decompress a memory buffer
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* @(#) $Id: uncompr.c,v 1.1 2004/10/08 09:44:26 const_k Exp $ */
+
+#include "zlib.h"
+
+/* ===========================================================================
+     Decompresses the source buffer into the destination buffer.  sourceLen is
+   the byte length of the source buffer. Upon entry, destLen is the total
+   size of the destination buffer, which must be large enough to hold the
+   entire uncompressed data. (The size of the uncompressed data must have
+   been saved previously by the compressor and transmitted to the decompressor
+   by some mechanism outside the scope of this compression library.)
+   Upon exit, destLen is the actual size of the compressed buffer.
+     This function can be used to decompress a whole file at once if the
+   input file is mmap'ed.
+
+     uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_BUF_ERROR if there was not enough room in the output
+   buffer, or Z_DATA_ERROR if the input data was corrupted.
+*/
+int ZEXPORT uncompress (dest, destLen, source, sourceLen)
+    Bytef *dest;
+    uLongf *destLen;
+    const Bytef *source;
+    uLong sourceLen;
+{
+    z_stream stream;
+    int err;
+
+    stream.next_in = (Bytef*)source;
+    stream.avail_in = (uInt)sourceLen;
+    /* Check for source > 64K on 16-bit machine: */
+    if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
+
+    stream.next_out = dest;
+    stream.avail_out = (uInt)*destLen;
+    if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+
+    stream.zalloc = (alloc_func)0;
+    stream.zfree = (free_func)0;
+
+    err = inflateInit(&stream);
+    if (err != Z_OK) return err;
+
+    err = inflate(&stream, Z_FINISH);
+    if (err != Z_STREAM_END) {
+        inflateEnd(&stream);
+        return err == Z_OK ? Z_BUF_ERROR : err;
+    }
+    *destLen = stream.total_out;
+
+    err = inflateEnd(&stream);
+    return err;
+}
diff --git a/common/zlib/zconf.h b/common/zlib/zconf.h
new file mode 100644
index 00000000..c8d6ce9a
--- /dev/null
+++ b/common/zlib/zconf.h
@@ -0,0 +1,279 @@
+/* zconf.h -- configuration of the zlib compression library
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* @(#) $Id: zconf.h,v 1.1 2004/10/08 09:44:26 const_k Exp $ */
+
+#ifndef _ZCONF_H
+#define _ZCONF_H
+
+/*
+ * If you *really* need a unique prefix for all types and library functions,
+ * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
+ */
+#ifdef Z_PREFIX
+#  define deflateInit_	z_deflateInit_
+#  define deflate	z_deflate
+#  define deflateEnd	z_deflateEnd
+#  define inflateInit_ 	z_inflateInit_
+#  define inflate	z_inflate
+#  define inflateEnd	z_inflateEnd
+#  define deflateInit2_	z_deflateInit2_
+#  define deflateSetDictionary z_deflateSetDictionary
+#  define deflateCopy	z_deflateCopy
+#  define deflateReset	z_deflateReset
+#  define deflateParams	z_deflateParams
+#  define inflateInit2_	z_inflateInit2_
+#  define inflateSetDictionary z_inflateSetDictionary
+#  define inflateSync	z_inflateSync
+#  define inflateSyncPoint z_inflateSyncPoint
+#  define inflateReset	z_inflateReset
+#  define compress	z_compress
+#  define compress2	z_compress2
+#  define uncompress	z_uncompress
+#  define adler32	z_adler32
+#  define crc32		z_crc32
+#  define get_crc_table z_get_crc_table
+
+#  define Byte		z_Byte
+#  define uInt		z_uInt
+#  define uLong		z_uLong
+#  define Bytef	        z_Bytef
+#  define charf		z_charf
+#  define intf		z_intf
+#  define uIntf		z_uIntf
+#  define uLongf	z_uLongf
+#  define voidpf	z_voidpf
+#  define voidp		z_voidp
+#endif
+
+#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
+#  define WIN32
+#endif
+#if defined(__GNUC__) || defined(WIN32) || defined(__386__) || defined(i386)
+#  ifndef __32BIT__
+#    define __32BIT__
+#  endif
+#endif
+#if defined(__MSDOS__) && !defined(MSDOS)
+#  define MSDOS
+#endif
+
+/*
+ * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
+ * than 64k bytes at a time (needed on systems with 16-bit int).
+ */
+#if defined(MSDOS) && !defined(__32BIT__)
+#  define MAXSEG_64K
+#endif
+#ifdef MSDOS
+#  define UNALIGNED_OK
+#endif
+
+#if (defined(MSDOS) || defined(_WINDOWS) || defined(WIN32))  && !defined(STDC)
+#  define STDC
+#endif
+#if defined(__STDC__) || defined(__cplusplus) || defined(__OS2__)
+#  ifndef STDC
+#    define STDC
+#  endif
+#endif
+
+#ifndef STDC
+#  ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
+#    define const
+#  endif
+#endif
+
+/* Some Mac compilers merge all .h files incorrectly: */
+#if defined(__MWERKS__) || defined(applec) ||defined(THINK_C) ||defined(__SC__)
+#  define NO_DUMMY_DECL
+#endif
+
+/* Old Borland C incorrectly complains about missing returns: */
+#if defined(__BORLANDC__) && (__BORLANDC__ < 0x500)
+#  define NEED_DUMMY_RETURN
+#endif
+
+
+/* Maximum value for memLevel in deflateInit2 */
+#ifndef MAX_MEM_LEVEL
+#  ifdef MAXSEG_64K
+#    define MAX_MEM_LEVEL 8
+#  else
+#    define MAX_MEM_LEVEL 9
+#  endif
+#endif
+
+/* Maximum value for windowBits in deflateInit2 and inflateInit2.
+ * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
+ * created by gzip. (Files created by minigzip can still be extracted by
+ * gzip.)
+ */
+#ifndef MAX_WBITS
+#  define MAX_WBITS   15 /* 32K LZ77 window */
+#endif
+
+/* The memory requirements for deflate are (in bytes):
+            (1 << (windowBits+2)) +  (1 << (memLevel+9))
+ that is: 128K for windowBits=15  +  128K for memLevel = 8  (default values)
+ plus a few kilobytes for small objects. For example, if you want to reduce
+ the default memory requirements from 256K to 128K, compile with
+     make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
+ Of course this will generally degrade compression (there's no free lunch).
+
+   The memory requirements for inflate are (in bytes) 1 << windowBits
+ that is, 32K for windowBits=15 (default value) plus a few kilobytes
+ for small objects.
+*/
+
+                        /* Type declarations */
+
+#ifndef OF /* function prototypes */
+#  ifdef STDC
+#    define OF(args)  args
+#  else
+#    define OF(args)  ()
+#  endif
+#endif
+
+/* The following definitions for FAR are needed only for MSDOS mixed
+ * model programming (small or medium model with some far allocations).
+ * This was tested only with MSC; for other MSDOS compilers you may have
+ * to define NO_MEMCPY in zutil.h.  If you don't need the mixed model,
+ * just define FAR to be empty.
+ */
+#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(__32BIT__)
+   /* MSC small or medium model */
+#  define SMALL_MEDIUM
+#  ifdef _MSC_VER
+#    define FAR _far
+#  else
+#    define FAR far
+#  endif
+#endif
+#if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
+#  ifndef __32BIT__
+#    define SMALL_MEDIUM
+#    define FAR _far
+#  endif
+#endif
+
+/* Compile with -DZLIB_DLL for Windows DLL support */
+#if defined(ZLIB_DLL)
+#  if defined(_WINDOWS) || defined(WINDOWS)
+#    ifdef FAR
+#      undef FAR
+#    endif
+#    include <windows.h>
+#    define ZEXPORT  WINAPI
+#    ifdef WIN32
+#      define ZEXPORTVA  WINAPIV
+#    else
+#      define ZEXPORTVA  FAR _cdecl _export
+#    endif
+#  endif
+#  if defined (__BORLANDC__)
+#    if (__BORLANDC__ >= 0x0500) && defined (WIN32)
+#      include <windows.h>
+#      define ZEXPORT __declspec(dllexport) WINAPI
+#      define ZEXPORTRVA __declspec(dllexport) WINAPIV
+#    else
+#      if defined (_Windows) && defined (__DLL__)
+#        define ZEXPORT _export
+#        define ZEXPORTVA _export
+#      endif
+#    endif
+#  endif
+#endif
+
+#if defined (__BEOS__)
+#  if defined (ZLIB_DLL)
+#    define ZEXTERN extern __declspec(dllexport)
+#  else
+#    define ZEXTERN extern __declspec(dllimport)
+#  endif
+#endif
+
+#ifndef ZEXPORT
+#  define ZEXPORT
+#endif
+#ifndef ZEXPORTVA
+#  define ZEXPORTVA
+#endif
+#ifndef ZEXTERN
+#  define ZEXTERN extern
+#endif
+
+#ifndef FAR
+#   define FAR
+#endif
+
+#if !defined(MACOS) && !defined(TARGET_OS_MAC)
+typedef unsigned char  Byte;  /* 8 bits */
+#endif
+typedef unsigned int   uInt;  /* 16 bits or more */
+typedef unsigned long  uLong; /* 32 bits or more */
+
+#ifdef SMALL_MEDIUM
+   /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
+#  define Bytef Byte FAR
+#else
+   typedef Byte  FAR Bytef;
+#endif
+typedef char  FAR charf;
+typedef int   FAR intf;
+typedef uInt  FAR uIntf;
+typedef uLong FAR uLongf;
+
+#ifdef STDC
+   typedef void FAR *voidpf;
+   typedef void     *voidp;
+#else
+   typedef Byte FAR *voidpf;
+   typedef Byte     *voidp;
+#endif
+
+#ifdef HAVE_UNISTD_H
+#  include <sys/types.h> /* for off_t */
+#  include <unistd.h>    /* for SEEK_* and off_t */
+#  define z_off_t  off_t
+#endif
+#ifndef SEEK_SET
+#  define SEEK_SET        0       /* Seek from beginning of file.  */
+#  define SEEK_CUR        1       /* Seek from current position.  */
+#  define SEEK_END        2       /* Set file pointer to EOF plus "offset" */
+#endif
+#ifndef z_off_t
+#  define  z_off_t long
+#endif
+
+/* MVS linker does not support external names larger than 8 bytes */
+#if defined(__MVS__)
+#   pragma map(deflateInit_,"DEIN")
+#   pragma map(deflateInit2_,"DEIN2")
+#   pragma map(deflateEnd,"DEEND")
+#   pragma map(inflateInit_,"ININ")
+#   pragma map(inflateInit2_,"ININ2")
+#   pragma map(inflateEnd,"INEND")
+#   pragma map(inflateSync,"INSY")
+#   pragma map(inflateSetDictionary,"INSEDI")
+#   pragma map(inflate_blocks,"INBL")
+#   pragma map(inflate_blocks_new,"INBLNE")
+#   pragma map(inflate_blocks_free,"INBLFR")
+#   pragma map(inflate_blocks_reset,"INBLRE")
+#   pragma map(inflate_codes_free,"INCOFR")
+#   pragma map(inflate_codes,"INCO")
+#   pragma map(inflate_fast,"INFA")
+#   pragma map(inflate_flush,"INFLU")
+#   pragma map(inflate_mask,"INMA")
+#   pragma map(inflate_set_dictionary,"INSEDI2")
+#   pragma map(inflate_copyright,"INCOPY")
+#   pragma map(inflate_trees_bits,"INTRBI")
+#   pragma map(inflate_trees_dynamic,"INTRDY")
+#   pragma map(inflate_trees_fixed,"INTRFI")
+#   pragma map(inflate_trees_free,"INTRFR")
+#endif
+
+#endif /* _ZCONF_H */
diff --git a/common/zlib/zlib.3 b/common/zlib/zlib.3
new file mode 100644
index 00000000..3a6e4504
--- /dev/null
+++ b/common/zlib/zlib.3
@@ -0,0 +1,107 @@
+.TH ZLIB 3 "11 March 2002"
+.SH NAME
+zlib \- compression/decompression library
+.SH SYNOPSIS
+[see
+.I zlib.h
+for full description]
+.SH DESCRIPTION
+The
+.I zlib
+library is a general purpose data compression library.
+The code is thread safe.
+It provides in-memory compression and decompression functions,
+including integrity checks of the uncompressed data.
+This version of the library supports only one compression method (deflation)
+but other algorithms will be added later and will have the same stream interface.
+.LP
+Compression can be done in a single step if the buffers are large enough
+(for example if an input file is mmap'ed),
+or can be done by repeated calls of the compression function.
+In the latter case,
+the application must provide more input and/or consume the output
+(providing more output space) before each call.
+.LP
+The library also supports reading and writing files in
+.I gzip
+(.gz) format
+with an interface similar to that of stdio.
+.LP
+The library does not install any signal handler. The decoder checks
+the consistency of the compressed data, so the library should never
+crash even in case of corrupted input.
+.LP
+All functions of the compression library are documented in the file
+.IR zlib.h.
+The distribution source includes examples of use of the library
+the files
+.I example.c
+and
+.IR minigzip.c .
+.LP
+A Java implementation of
+.IR zlib
+is available in the Java Development Kit 1.1
+.IP
+http://www.javasoft.com/products/JDK/1.1/docs/api/Package-java.util.zip.html
+.LP
+A Perl interface to
+.IR zlib ,
+written by Paul Marquess (pmarquess@bfsec.bt.co.uk)
+is available at CPAN (Comprehensive Perl Archive Network) sites,
+such as:
+.IP
+ftp://ftp.cis.ufl.edu/pub/perl/CPAN/modules/by-module/Compress/Compress-Zlib*
+.LP
+A Python interface to
+.IR zlib
+written by A.M. Kuchling <amk@magnet.com>
+is available from the Python Software Association sites, such as:
+.IP
+ftp://ftp.python.org/pub/python/contrib/Encoding/zlib*.tar.gz
+.SH "SEE ALSO"
+Questions about zlib should be sent to:
+.IP
+zlib@quest.jpl.nasa.gov
+or, if this fails, to the author addresses given below.
+The zlib home page is:
+.IP
+http://www.cdrom.com/pub/infozip/zlib/
+.LP
+The data format used by the zlib library is described by RFC
+(Request for Comments) 1950 to 1952 in the files: 
+.IP
+ftp://ds.internic.net/rfc/rfc1950.txt (zlib format)
+.br
+rfc1951.txt (deflate format)
+.br
+rfc1952.txt (gzip format)
+.LP
+These documents are also available in other formats from:
+.IP
+ftp://ftp.uu.net/graphics/png/documents/zlib/zdoc-index.html
+.SH AUTHORS
+Version 1.1.4
+Copyright (C) 1995-2002 Jean-loup Gailly (jloup@gzip.org)
+and Mark Adler (madler@alumni.caltech.edu).
+.LP
+This software is provided "as-is,"
+without any express or implied warranty.
+In no event will the authors be held liable for any damages
+arising from the use of this software.
+See the distribution directory with respect to requirements
+governing redistribution.
+The deflate format used by
+.I zlib
+was defined by Phil Katz.
+The deflate and
+.I zlib
+specifications were written by L. Peter Deutsch.
+Thanks to all the people who reported problems and suggested various
+improvements in
+.IR zlib ;
+who are too numerous to cite here.
+.LP
+UNIX manual page by R. P. C. Rodgers,
+U.S. National Library of Medicine (rodgers@nlm.nih.gov).
+.\" end of man page
diff --git a/common/zlib/zlib.dsp b/common/zlib/zlib.dsp
new file mode 100644
index 00000000..ede5851e
--- /dev/null
+++ b/common/zlib/zlib.dsp
@@ -0,0 +1,217 @@
+# Microsoft Developer Studio Project File - Name="zlib" - Package Owner=<4>

+# Microsoft Developer Studio Generated Build File, Format Version 6.00

+# ** DO NOT EDIT **

+

+# TARGTYPE "Win32 (x86) Static Library" 0x0104

+

+CFG=zlib - Win32 Debug Unicode

+!MESSAGE This is not a valid makefile. To build this project using NMAKE,

+!MESSAGE use the Export Makefile command and run

+!MESSAGE 

+!MESSAGE NMAKE /f "zlib.mak".

+!MESSAGE 

+!MESSAGE You can specify a configuration when running NMAKE

+!MESSAGE by defining the macro CFG on the command line. For example:

+!MESSAGE 

+!MESSAGE NMAKE /f "zlib.mak" CFG="zlib - Win32 Debug Unicode"

+!MESSAGE 

+!MESSAGE Possible choices for configuration are:

+!MESSAGE 

+!MESSAGE "zlib - Win32 Release" (based on "Win32 (x86) Static Library")

+!MESSAGE "zlib - Win32 Debug" (based on "Win32 (x86) Static Library")

+!MESSAGE "zlib - Win32 Debug Unicode" (based on "Win32 (x86) Static Library")

+!MESSAGE 

+

+# Begin Project

+# PROP AllowPerConfigDependencies 0

+# PROP Scc_ProjName ""

+# PROP Scc_LocalPath ""

+CPP=cl.exe

+RSC=rc.exe

+

+!IF  "$(CFG)" == "zlib - Win32 Release"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 0

+# PROP BASE Output_Dir "Release"

+# PROP BASE Intermediate_Dir "Release"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 0

+# PROP Output_Dir "..\Release"

+# PROP Intermediate_Dir "..\Release\zlib"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_MBCS" /D "_LIB" /YX /FD /c

+# ADD CPP /nologo /MT /W3 /GX /O1 /D "NDEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /c

+# ADD BASE RSC /l 0x809 /d "NDEBUG"

+# ADD RSC /l 0x809 /d "NDEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ELSEIF  "$(CFG)" == "zlib - Win32 Debug"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "Debug"

+# PROP BASE Intermediate_Dir "Debug"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "..\Debug"

+# PROP Intermediate_Dir "..\Debug\zlib"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_MBCS" /D "_LIB" /YX /FD /GZ /c

+# ADD CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /D "_DEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x809 /d "_DEBUG"

+# ADD RSC /l 0x809 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ELSEIF  "$(CFG)" == "zlib - Win32 Debug Unicode"

+

+# PROP BASE Use_MFC 0

+# PROP BASE Use_Debug_Libraries 1

+# PROP BASE Output_Dir "zlib___Win32_Debug_Unicode"

+# PROP BASE Intermediate_Dir "zlib___Win32_Debug_Unicode"

+# PROP BASE Target_Dir ""

+# PROP Use_MFC 0

+# PROP Use_Debug_Libraries 1

+# PROP Output_Dir "..\Debug_Unicode"

+# PROP Intermediate_Dir "..\Debug_Unicode\zlib"

+# PROP Target_Dir ""

+# ADD BASE CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /D "_DEBUG" /D "_LIB" /D "WIN32" /D "_MBCS" /YX /FD /GZ /c

+# ADD CPP /nologo /MTd /W3 /Gm /GX /Zi /Od /D "_LIB" /D "_DEBUG" /D "WIN32" /D "_UNICODE" /D "UNICODE" /YX /FD /GZ /c

+# ADD BASE RSC /l 0x809 /d "_DEBUG"

+# ADD RSC /l 0x809 /d "_DEBUG"

+BSC32=bscmake.exe

+# ADD BASE BSC32 /nologo

+# ADD BSC32 /nologo

+LIB32=link.exe -lib

+# ADD BASE LIB32 /nologo

+# ADD LIB32 /nologo

+

+!ENDIF 

+

+# Begin Target

+

+# Name "zlib - Win32 Release"

+# Name "zlib - Win32 Debug"

+# Name "zlib - Win32 Debug Unicode"

+# Begin Group "Source Files"

+

+# PROP Default_Filter "cpp;c;cxx;rc;def;r;odl;idl;hpj;bat"

+# Begin Source File

+

+SOURCE=.\adler32.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\compress.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\crc32.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\deflate.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\gzio.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\infblock.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\infcodes.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\inffast.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\inflate.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\inftrees.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\infutil.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\trees.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\uncompr.c

+# End Source File

+# Begin Source File

+

+SOURCE=.\zutil.c

+# End Source File

+# End Group

+# Begin Group "Header Files"

+

+# PROP Default_Filter "h;hpp;hxx;hm;inl"

+# Begin Source File

+

+SOURCE=.\deflate.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\infblock.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\infcodes.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\inffast.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\inffixed.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\inftrees.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\infutil.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\trees.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\zconf.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\zlib.h

+# End Source File

+# Begin Source File

+

+SOURCE=.\zutil.h

+# End Source File

+# End Group

+# End Target

+# End Project

diff --git a/common/zlib/zlib.h b/common/zlib/zlib.h
new file mode 100644
index 00000000..52cb529f
--- /dev/null
+++ b/common/zlib/zlib.h
@@ -0,0 +1,893 @@
+/* zlib.h -- interface of the 'zlib' general purpose compression library
+  version 1.1.4, March 11th, 2002
+
+  Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+
+  Jean-loup Gailly        Mark Adler
+  jloup@gzip.org          madler@alumni.caltech.edu
+
+
+  The data format used by the zlib library is described by RFCs (Request for
+  Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
+  (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
+*/
+
+#ifndef _ZLIB_H
+#define _ZLIB_H
+
+#include "zconf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ZLIB_VERSION "1.1.4"
+
+/* 
+     The 'zlib' compression library provides in-memory compression and
+  decompression functions, including integrity checks of the uncompressed
+  data.  This version of the library supports only one compression method
+  (deflation) but other algorithms will be added later and will have the same
+  stream interface.
+
+     Compression can be done in a single step if the buffers are large
+  enough (for example if an input file is mmap'ed), or can be done by
+  repeated calls of the compression function.  In the latter case, the
+  application must provide more input and/or consume the output
+  (providing more output space) before each call.
+
+     The library also supports reading and writing files in gzip (.gz) format
+  with an interface similar to that of stdio.
+
+     The library does not install any signal handler. The decoder checks
+  the consistency of the compressed data, so the library should never
+  crash even in case of corrupted input.
+*/
+
+typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
+typedef void   (*free_func)  OF((voidpf opaque, voidpf address));
+
+struct internal_state;
+
+typedef struct z_stream_s {
+    Bytef    *next_in;  /* next input byte */
+    uInt     avail_in;  /* number of bytes available at next_in */
+    uLong    total_in;  /* total nb of input bytes read so far */
+
+    Bytef    *next_out; /* next output byte should be put there */
+    uInt     avail_out; /* remaining free space at next_out */
+    uLong    total_out; /* total nb of bytes output so far */
+
+    char     *msg;      /* last error message, NULL if no error */
+    struct internal_state FAR *state; /* not visible by applications */
+
+    alloc_func zalloc;  /* used to allocate the internal state */
+    free_func  zfree;   /* used to free the internal state */
+    voidpf     opaque;  /* private data object passed to zalloc and zfree */
+
+    int     data_type;  /* best guess about the data type: ascii or binary */
+    uLong   adler;      /* adler32 value of the uncompressed data */
+    uLong   reserved;   /* reserved for future use */
+} z_stream;
+
+typedef z_stream FAR *z_streamp;
+
+/*
+   The application must update next_in and avail_in when avail_in has
+   dropped to zero. It must update next_out and avail_out when avail_out
+   has dropped to zero. The application must initialize zalloc, zfree and
+   opaque before calling the init function. All other fields are set by the
+   compression library and must not be updated by the application.
+
+   The opaque value provided by the application will be passed as the first
+   parameter for calls of zalloc and zfree. This can be useful for custom
+   memory management. The compression library attaches no meaning to the
+   opaque value.
+
+   zalloc must return Z_NULL if there is not enough memory for the object.
+   If zlib is used in a multi-threaded application, zalloc and zfree must be
+   thread safe.
+
+   On 16-bit systems, the functions zalloc and zfree must be able to allocate
+   exactly 65536 bytes, but will not be required to allocate more than this
+   if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
+   pointers returned by zalloc for objects of exactly 65536 bytes *must*
+   have their offset normalized to zero. The default allocation function
+   provided by this library ensures this (see zutil.c). To reduce memory
+   requirements and avoid any allocation of 64K objects, at the expense of
+   compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
+
+   The fields total_in and total_out can be used for statistics or
+   progress reports. After compression, total_in holds the total size of
+   the uncompressed data and may be saved for use in the decompressor
+   (particularly if the decompressor wants to decompress everything in
+   a single step).
+*/
+
+                        /* constants */
+
+#define Z_NO_FLUSH      0
+#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
+#define Z_SYNC_FLUSH    2
+#define Z_FULL_FLUSH    3
+#define Z_FINISH        4
+/* Allowed flush values; see deflate() below for details */
+
+#define Z_OK            0
+#define Z_STREAM_END    1
+#define Z_NEED_DICT     2
+#define Z_ERRNO        (-1)
+#define Z_STREAM_ERROR (-2)
+#define Z_DATA_ERROR   (-3)
+#define Z_MEM_ERROR    (-4)
+#define Z_BUF_ERROR    (-5)
+#define Z_VERSION_ERROR (-6)
+/* Return codes for the compression/decompression functions. Negative
+ * values are errors, positive values are used for special but normal events.
+ */
+
+#define Z_NO_COMPRESSION         0
+#define Z_BEST_SPEED             1
+#define Z_BEST_COMPRESSION       9
+#define Z_DEFAULT_COMPRESSION  (-1)
+/* compression levels */
+
+#define Z_FILTERED            1
+#define Z_HUFFMAN_ONLY        2
+#define Z_DEFAULT_STRATEGY    0
+/* compression strategy; see deflateInit2() below for details */
+
+#define Z_BINARY   0
+#define Z_ASCII    1
+#define Z_UNKNOWN  2
+/* Possible values of the data_type field */
+
+#define Z_DEFLATED   8
+/* The deflate compression method (the only one supported in this version) */
+
+#define Z_NULL  0  /* for initializing zalloc, zfree, opaque */
+
+#define zlib_version zlibVersion()
+/* for compatibility with versions < 1.0.2 */
+
+                        /* basic functions */
+
+ZEXTERN const char * ZEXPORT zlibVersion OF((void));
+/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
+   If the first character differs, the library code actually used is
+   not compatible with the zlib.h header file used by the application.
+   This check is automatically made by deflateInit and inflateInit.
+ */
+
+/* 
+ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
+
+     Initializes the internal stream state for compression. The fields
+   zalloc, zfree and opaque must be initialized before by the caller.
+   If zalloc and zfree are set to Z_NULL, deflateInit updates them to
+   use default allocation functions.
+
+     The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
+   1 gives best speed, 9 gives best compression, 0 gives no compression at
+   all (the input data is simply copied a block at a time).
+   Z_DEFAULT_COMPRESSION requests a default compromise between speed and
+   compression (currently equivalent to level 6).
+
+     deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_STREAM_ERROR if level is not a valid compression level,
+   Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
+   with the version assumed by the caller (ZLIB_VERSION).
+   msg is set to null if there is no error message.  deflateInit does not
+   perform any compression: this will be done by deflate().
+*/
+
+
+ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
+/*
+    deflate compresses as much data as possible, and stops when the input
+  buffer becomes empty or the output buffer becomes full. It may introduce some
+  output latency (reading input without producing any output) except when
+  forced to flush.
+
+    The detailed semantics are as follows. deflate performs one or both of the
+  following actions:
+
+  - Compress more input starting at next_in and update next_in and avail_in
+    accordingly. If not all input can be processed (because there is not
+    enough room in the output buffer), next_in and avail_in are updated and
+    processing will resume at this point for the next call of deflate().
+
+  - Provide more output starting at next_out and update next_out and avail_out
+    accordingly. This action is forced if the parameter flush is non zero.
+    Forcing flush frequently degrades the compression ratio, so this parameter
+    should be set only when necessary (in interactive applications).
+    Some output may be provided even if flush is not set.
+
+  Before the call of deflate(), the application should ensure that at least
+  one of the actions is possible, by providing more input and/or consuming
+  more output, and updating avail_in or avail_out accordingly; avail_out
+  should never be zero before the call. The application can consume the
+  compressed output when it wants, for example when the output buffer is full
+  (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
+  and with zero avail_out, it must be called again after making room in the
+  output buffer because there might be more output pending.
+
+    If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
+  flushed to the output buffer and the output is aligned on a byte boundary, so
+  that the decompressor can get all input data available so far. (In particular
+  avail_in is zero after the call if enough output space has been provided
+  before the call.)  Flushing may degrade compression for some compression
+  algorithms and so it should be used only when necessary.
+
+    If flush is set to Z_FULL_FLUSH, all output is flushed as with
+  Z_SYNC_FLUSH, and the compression state is reset so that decompression can
+  restart from this point if previous compressed data has been damaged or if
+  random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
+  the compression.
+
+    If deflate returns with avail_out == 0, this function must be called again
+  with the same value of the flush parameter and more output space (updated
+  avail_out), until the flush is complete (deflate returns with non-zero
+  avail_out).
+
+    If the parameter flush is set to Z_FINISH, pending input is processed,
+  pending output is flushed and deflate returns with Z_STREAM_END if there
+  was enough output space; if deflate returns with Z_OK, this function must be
+  called again with Z_FINISH and more output space (updated avail_out) but no
+  more input data, until it returns with Z_STREAM_END or an error. After
+  deflate has returned Z_STREAM_END, the only possible operations on the
+  stream are deflateReset or deflateEnd.
+  
+    Z_FINISH can be used immediately after deflateInit if all the compression
+  is to be done in a single step. In this case, avail_out must be at least
+  0.1% larger than avail_in plus 12 bytes.  If deflate does not return
+  Z_STREAM_END, then it must be called again as described above.
+
+    deflate() sets strm->adler to the adler32 checksum of all input read
+  so far (that is, total_in bytes).
+
+    deflate() may update data_type if it can make a good guess about
+  the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered
+  binary. This field is only for information purposes and does not affect
+  the compression algorithm in any manner.
+
+    deflate() returns Z_OK if some progress has been made (more input
+  processed or more output produced), Z_STREAM_END if all input has been
+  consumed and all output has been produced (only when flush is set to
+  Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
+  if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
+  (for example avail_in or avail_out was zero).
+*/
+
+
+ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
+/*
+     All dynamically allocated data structures for this stream are freed.
+   This function discards any unprocessed input and does not flush any
+   pending output.
+
+     deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
+   stream state was inconsistent, Z_DATA_ERROR if the stream was freed
+   prematurely (some input or output was discarded). In the error case,
+   msg may be set but then points to a static string (which must not be
+   deallocated).
+*/
+
+
+/* 
+ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
+
+     Initializes the internal stream state for decompression. The fields
+   next_in, avail_in, zalloc, zfree and opaque must be initialized before by
+   the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
+   value depends on the compression method), inflateInit determines the
+   compression method from the zlib header and allocates all data structures
+   accordingly; otherwise the allocation will be deferred to the first call of
+   inflate.  If zalloc and zfree are set to Z_NULL, inflateInit updates them to
+   use default allocation functions.
+
+     inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
+   version assumed by the caller.  msg is set to null if there is no error
+   message. inflateInit does not perform any decompression apart from reading
+   the zlib header if present: this will be done by inflate().  (So next_in and
+   avail_in may be modified, but next_out and avail_out are unchanged.)
+*/
+
+
+ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
+/*
+    inflate decompresses as much data as possible, and stops when the input
+  buffer becomes empty or the output buffer becomes full. It may some
+  introduce some output latency (reading input without producing any output)
+  except when forced to flush.
+
+  The detailed semantics are as follows. inflate performs one or both of the
+  following actions:
+
+  - Decompress more input starting at next_in and update next_in and avail_in
+    accordingly. If not all input can be processed (because there is not
+    enough room in the output buffer), next_in is updated and processing
+    will resume at this point for the next call of inflate().
+
+  - Provide more output starting at next_out and update next_out and avail_out
+    accordingly.  inflate() provides as much output as possible, until there
+    is no more input data or no more space in the output buffer (see below
+    about the flush parameter).
+
+  Before the call of inflate(), the application should ensure that at least
+  one of the actions is possible, by providing more input and/or consuming
+  more output, and updating the next_* and avail_* values accordingly.
+  The application can consume the uncompressed output when it wants, for
+  example when the output buffer is full (avail_out == 0), or after each
+  call of inflate(). If inflate returns Z_OK and with zero avail_out, it
+  must be called again after making room in the output buffer because there
+  might be more output pending.
+
+    If the parameter flush is set to Z_SYNC_FLUSH, inflate flushes as much
+  output as possible to the output buffer. The flushing behavior of inflate is
+  not specified for values of the flush parameter other than Z_SYNC_FLUSH
+  and Z_FINISH, but the current implementation actually flushes as much output
+  as possible anyway.
+
+    inflate() should normally be called until it returns Z_STREAM_END or an
+  error. However if all decompression is to be performed in a single step
+  (a single call of inflate), the parameter flush should be set to
+  Z_FINISH. In this case all pending input is processed and all pending
+  output is flushed; avail_out must be large enough to hold all the
+  uncompressed data. (The size of the uncompressed data may have been saved
+  by the compressor for this purpose.) The next operation on this stream must
+  be inflateEnd to deallocate the decompression state. The use of Z_FINISH
+  is never required, but can be used to inform inflate that a faster routine
+  may be used for the single inflate() call.
+
+     If a preset dictionary is needed at this point (see inflateSetDictionary
+  below), inflate sets strm-adler to the adler32 checksum of the
+  dictionary chosen by the compressor and returns Z_NEED_DICT; otherwise 
+  it sets strm->adler to the adler32 checksum of all output produced
+  so far (that is, total_out bytes) and returns Z_OK, Z_STREAM_END or
+  an error code as described below. At the end of the stream, inflate()
+  checks that its computed adler32 checksum is equal to that saved by the
+  compressor and returns Z_STREAM_END only if the checksum is correct.
+
+    inflate() returns Z_OK if some progress has been made (more input processed
+  or more output produced), Z_STREAM_END if the end of the compressed data has
+  been reached and all uncompressed output has been produced, Z_NEED_DICT if a
+  preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
+  corrupted (input stream not conforming to the zlib format or incorrect
+  adler32 checksum), Z_STREAM_ERROR if the stream structure was inconsistent
+  (for example if next_in or next_out was NULL), Z_MEM_ERROR if there was not
+  enough memory, Z_BUF_ERROR if no progress is possible or if there was not
+  enough room in the output buffer when Z_FINISH is used. In the Z_DATA_ERROR
+  case, the application may then call inflateSync to look for a good
+  compression block.
+*/
+
+
+ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
+/*
+     All dynamically allocated data structures for this stream are freed.
+   This function discards any unprocessed input and does not flush any
+   pending output.
+
+     inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
+   was inconsistent. In the error case, msg may be set but then points to a
+   static string (which must not be deallocated).
+*/
+
+                        /* Advanced functions */
+
+/*
+    The following functions are needed only in some special applications.
+*/
+
+/*   
+ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
+                                     int  level,
+                                     int  method,
+                                     int  windowBits,
+                                     int  memLevel,
+                                     int  strategy));
+
+     This is another version of deflateInit with more compression options. The
+   fields next_in, zalloc, zfree and opaque must be initialized before by
+   the caller.
+
+     The method parameter is the compression method. It must be Z_DEFLATED in
+   this version of the library.
+
+     The windowBits parameter is the base two logarithm of the window size
+   (the size of the history buffer).  It should be in the range 8..15 for this
+   version of the library. Larger values of this parameter result in better
+   compression at the expense of memory usage. The default value is 15 if
+   deflateInit is used instead.
+
+     The memLevel parameter specifies how much memory should be allocated
+   for the internal compression state. memLevel=1 uses minimum memory but
+   is slow and reduces compression ratio; memLevel=9 uses maximum memory
+   for optimal speed. The default value is 8. See zconf.h for total memory
+   usage as a function of windowBits and memLevel.
+
+     The strategy parameter is used to tune the compression algorithm. Use the
+   value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
+   filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman encoding only (no
+   string match).  Filtered data consists mostly of small values with a
+   somewhat random distribution. In this case, the compression algorithm is
+   tuned to compress them better. The effect of Z_FILTERED is to force more
+   Huffman coding and less string matching; it is somewhat intermediate
+   between Z_DEFAULT and Z_HUFFMAN_ONLY. The strategy parameter only affects
+   the compression ratio but not the correctness of the compressed output even
+   if it is not set appropriately.
+
+      deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
+   method). msg is set to null if there is no error message.  deflateInit2 does
+   not perform any compression: this will be done by deflate().
+*/
+                            
+ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
+                                             const Bytef *dictionary,
+                                             uInt  dictLength));
+/*
+     Initializes the compression dictionary from the given byte sequence
+   without producing any compressed output. This function must be called
+   immediately after deflateInit, deflateInit2 or deflateReset, before any
+   call of deflate. The compressor and decompressor must use exactly the same
+   dictionary (see inflateSetDictionary).
+
+     The dictionary should consist of strings (byte sequences) that are likely
+   to be encountered later in the data to be compressed, with the most commonly
+   used strings preferably put towards the end of the dictionary. Using a
+   dictionary is most useful when the data to be compressed is short and can be
+   predicted with good accuracy; the data can then be compressed better than
+   with the default empty dictionary.
+
+     Depending on the size of the compression data structures selected by
+   deflateInit or deflateInit2, a part of the dictionary may in effect be
+   discarded, for example if the dictionary is larger than the window size in
+   deflate or deflate2. Thus the strings most likely to be useful should be
+   put at the end of the dictionary, not at the front.
+
+     Upon return of this function, strm->adler is set to the Adler32 value
+   of the dictionary; the decompressor may later use this value to determine
+   which dictionary has been used by the compressor. (The Adler32 value
+   applies to the whole dictionary even if only a subset of the dictionary is
+   actually used by the compressor.)
+
+     deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
+   parameter is invalid (such as NULL dictionary) or the stream state is
+   inconsistent (for example if deflate has already been called for this stream
+   or if the compression method is bsort). deflateSetDictionary does not
+   perform any compression: this will be done by deflate().
+*/
+
+ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
+                                    z_streamp source));
+/*
+     Sets the destination stream as a complete copy of the source stream.
+
+     This function can be useful when several compression strategies will be
+   tried, for example when there are several ways of pre-processing the input
+   data with a filter. The streams that will be discarded should then be freed
+   by calling deflateEnd.  Note that deflateCopy duplicates the internal
+   compression state which can be quite large, so this strategy is slow and
+   can consume lots of memory.
+
+     deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
+   (such as zalloc being NULL). msg is left unchanged in both source and
+   destination.
+*/
+
+ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
+/*
+     This function is equivalent to deflateEnd followed by deflateInit,
+   but does not free and reallocate all the internal compression state.
+   The stream will keep the same compression level and any other attributes
+   that may have been set by deflateInit2.
+
+      deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
+ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
+				      int level,
+				      int strategy));
+/*
+     Dynamically update the compression level and compression strategy.  The
+   interpretation of level and strategy is as in deflateInit2.  This can be
+   used to switch between compression and straight copy of the input data, or
+   to switch to a different kind of input data requiring a different
+   strategy. If the compression level is changed, the input available so far
+   is compressed with the old level (and may be flushed); the new level will
+   take effect only at the next call of deflate().
+
+     Before the call of deflateParams, the stream state must be set as for
+   a call of deflate(), since the currently available input may have to
+   be compressed and flushed. In particular, strm->avail_out must be non-zero.
+
+     deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
+   stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
+   if strm->avail_out was zero.
+*/
+
+/*   
+ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
+                                     int  windowBits));
+
+     This is another version of inflateInit with an extra parameter. The
+   fields next_in, avail_in, zalloc, zfree and opaque must be initialized
+   before by the caller.
+
+     The windowBits parameter is the base two logarithm of the maximum window
+   size (the size of the history buffer).  It should be in the range 8..15 for
+   this version of the library. The default value is 15 if inflateInit is used
+   instead. If a compressed stream with a larger window size is given as
+   input, inflate() will return with the error code Z_DATA_ERROR instead of
+   trying to allocate a larger window.
+
+      inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
+   memLevel). msg is set to null if there is no error message.  inflateInit2
+   does not perform any decompression apart from reading the zlib header if
+   present: this will be done by inflate(). (So next_in and avail_in may be
+   modified, but next_out and avail_out are unchanged.)
+*/
+
+ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
+                                             const Bytef *dictionary,
+                                             uInt  dictLength));
+/*
+     Initializes the decompression dictionary from the given uncompressed byte
+   sequence. This function must be called immediately after a call of inflate
+   if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
+   can be determined from the Adler32 value returned by this call of
+   inflate. The compressor and decompressor must use exactly the same
+   dictionary (see deflateSetDictionary).
+
+     inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
+   parameter is invalid (such as NULL dictionary) or the stream state is
+   inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
+   expected one (incorrect Adler32 value). inflateSetDictionary does not
+   perform any decompression: this will be done by subsequent calls of
+   inflate().
+*/
+
+ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
+/* 
+    Skips invalid compressed data until a full flush point (see above the
+  description of deflate with Z_FULL_FLUSH) can be found, or until all
+  available input is skipped. No output is provided.
+
+    inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
+  if no more input was provided, Z_DATA_ERROR if no flush point has been found,
+  or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
+  case, the application may save the current current value of total_in which
+  indicates where valid compressed data was found. In the error case, the
+  application may repeatedly call inflateSync, providing more input each time,
+  until success or end of the input data.
+*/
+
+ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
+/*
+     This function is equivalent to inflateEnd followed by inflateInit,
+   but does not free and reallocate all the internal decompression state.
+   The stream will keep attributes that may have been set by inflateInit2.
+
+      inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
+   stream state was inconsistent (such as zalloc or state being NULL).
+*/
+
+
+                        /* utility functions */
+
+/*
+     The following utility functions are implemented on top of the
+   basic stream-oriented functions. To simplify the interface, some
+   default options are assumed (compression level and memory usage,
+   standard memory allocation functions). The source code of these
+   utility functions can easily be modified if you need special options.
+*/
+
+ZEXTERN int ZEXPORT compress OF((Bytef *dest,   uLongf *destLen,
+                                 const Bytef *source, uLong sourceLen));
+/*
+     Compresses the source buffer into the destination buffer.  sourceLen is
+   the byte length of the source buffer. Upon entry, destLen is the total
+   size of the destination buffer, which must be at least 0.1% larger than
+   sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
+   compressed buffer.
+     This function can be used to compress a whole file at once if the
+   input file is mmap'ed.
+     compress returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_BUF_ERROR if there was not enough room in the output
+   buffer.
+*/
+
+ZEXTERN int ZEXPORT compress2 OF((Bytef *dest,   uLongf *destLen,
+                                  const Bytef *source, uLong sourceLen,
+                                  int level));
+/*
+     Compresses the source buffer into the destination buffer. The level
+   parameter has the same meaning as in deflateInit.  sourceLen is the byte
+   length of the source buffer. Upon entry, destLen is the total size of the
+   destination buffer, which must be at least 0.1% larger than sourceLen plus
+   12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+
+     compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
+   memory, Z_BUF_ERROR if there was not enough room in the output buffer,
+   Z_STREAM_ERROR if the level parameter is invalid.
+*/
+
+ZEXTERN int ZEXPORT uncompress OF((Bytef *dest,   uLongf *destLen,
+                                   const Bytef *source, uLong sourceLen));
+/*
+     Decompresses the source buffer into the destination buffer.  sourceLen is
+   the byte length of the source buffer. Upon entry, destLen is the total
+   size of the destination buffer, which must be large enough to hold the
+   entire uncompressed data. (The size of the uncompressed data must have
+   been saved previously by the compressor and transmitted to the decompressor
+   by some mechanism outside the scope of this compression library.)
+   Upon exit, destLen is the actual size of the compressed buffer.
+     This function can be used to decompress a whole file at once if the
+   input file is mmap'ed.
+
+     uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
+   enough memory, Z_BUF_ERROR if there was not enough room in the output
+   buffer, or Z_DATA_ERROR if the input data was corrupted.
+*/
+
+
+typedef voidp gzFile;
+
+ZEXTERN gzFile ZEXPORT gzopen  OF((const char *path, const char *mode));
+/*
+     Opens a gzip (.gz) file for reading or writing. The mode parameter
+   is as in fopen ("rb" or "wb") but can also include a compression level
+   ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
+   Huffman only compression as in "wb1h". (See the description
+   of deflateInit2 for more information about the strategy parameter.)
+
+     gzopen can be used to read a file which is not in gzip format; in this
+   case gzread will directly read from the file without decompression.
+
+     gzopen returns NULL if the file could not be opened or if there was
+   insufficient memory to allocate the (de)compression state; errno
+   can be checked to distinguish the two cases (if errno is zero, the
+   zlib error is Z_MEM_ERROR).  */
+
+ZEXTERN gzFile ZEXPORT gzdopen  OF((int fd, const char *mode));
+/*
+     gzdopen() associates a gzFile with the file descriptor fd.  File
+   descriptors are obtained from calls like open, dup, creat, pipe or
+   fileno (in the file has been previously opened with fopen).
+   The mode parameter is as in gzopen.
+     The next call of gzclose on the returned gzFile will also close the
+   file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
+   descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
+     gzdopen returns NULL if there was insufficient memory to allocate
+   the (de)compression state.
+*/
+
+ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
+/*
+     Dynamically update the compression level or strategy. See the description
+   of deflateInit2 for the meaning of these parameters.
+     gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
+   opened for writing.
+*/
+
+ZEXTERN int ZEXPORT    gzread  OF((gzFile file, voidp buf, unsigned len));
+/*
+     Reads the given number of uncompressed bytes from the compressed file.
+   If the input file was not in gzip format, gzread copies the given number
+   of bytes into the buffer.
+     gzread returns the number of uncompressed bytes actually read (0 for
+   end of file, -1 for error). */
+
+ZEXTERN int ZEXPORT    gzwrite OF((gzFile file, 
+				   const voidp buf, unsigned len));
+/*
+     Writes the given number of uncompressed bytes into the compressed file.
+   gzwrite returns the number of uncompressed bytes actually written
+   (0 in case of error).
+*/
+
+ZEXTERN int ZEXPORTVA   gzprintf OF((gzFile file, const char *format, ...));
+/*
+     Converts, formats, and writes the args to the compressed file under
+   control of the format string, as in fprintf. gzprintf returns the number of
+   uncompressed bytes actually written (0 in case of error).
+*/
+
+ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
+/*
+      Writes the given null-terminated string to the compressed file, excluding
+   the terminating null character.
+      gzputs returns the number of characters written, or -1 in case of error.
+*/
+
+ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
+/*
+      Reads bytes from the compressed file until len-1 characters are read, or
+   a newline character is read and transferred to buf, or an end-of-file
+   condition is encountered.  The string is then terminated with a null
+   character.
+      gzgets returns buf, or Z_NULL in case of error.
+*/
+
+ZEXTERN int ZEXPORT    gzputc OF((gzFile file, int c));
+/*
+      Writes c, converted to an unsigned char, into the compressed file.
+   gzputc returns the value that was written, or -1 in case of error.
+*/
+
+ZEXTERN int ZEXPORT    gzgetc OF((gzFile file));
+/*
+      Reads one byte from the compressed file. gzgetc returns this byte
+   or -1 in case of end of file or error.
+*/
+
+ZEXTERN int ZEXPORT    gzflush OF((gzFile file, int flush));
+/*
+     Flushes all pending output into the compressed file. The parameter
+   flush is as in the deflate() function. The return value is the zlib
+   error number (see function gzerror below). gzflush returns Z_OK if
+   the flush parameter is Z_FINISH and all output could be flushed.
+     gzflush should be called only when strictly necessary because it can
+   degrade compression.
+*/
+
+ZEXTERN z_off_t ZEXPORT    gzseek OF((gzFile file,
+				      z_off_t offset, int whence));
+/* 
+      Sets the starting position for the next gzread or gzwrite on the
+   given compressed file. The offset represents a number of bytes in the
+   uncompressed data stream. The whence parameter is defined as in lseek(2);
+   the value SEEK_END is not supported.
+     If the file is opened for reading, this function is emulated but can be
+   extremely slow. If the file is opened for writing, only forward seeks are
+   supported; gzseek then compresses a sequence of zeroes up to the new
+   starting position.
+
+      gzseek returns the resulting offset location as measured in bytes from
+   the beginning of the uncompressed stream, or -1 in case of error, in
+   particular if the file is opened for writing and the new starting position
+   would be before the current position.
+*/
+
+ZEXTERN int ZEXPORT    gzrewind OF((gzFile file));
+/*
+     Rewinds the given file. This function is supported only for reading.
+
+   gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
+*/
+
+ZEXTERN z_off_t ZEXPORT    gztell OF((gzFile file));
+/*
+     Returns the starting position for the next gzread or gzwrite on the
+   given compressed file. This position represents a number of bytes in the
+   uncompressed data stream.
+
+   gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
+*/
+
+ZEXTERN int ZEXPORT gzeof OF((gzFile file));
+/*
+     Returns 1 when EOF has previously been detected reading the given
+   input stream, otherwise zero.
+*/
+
+ZEXTERN int ZEXPORT    gzclose OF((gzFile file));
+/*
+     Flushes all pending output if necessary, closes the compressed file
+   and deallocates all the (de)compression state. The return value is the zlib
+   error number (see function gzerror below).
+*/
+
+ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
+/*
+     Returns the error message for the last error which occurred on the
+   given compressed file. errnum is set to zlib error number. If an
+   error occurred in the file system and not in the compression library,
+   errnum is set to Z_ERRNO and the application may consult errno
+   to get the exact error code.
+*/
+
+                        /* checksum functions */
+
+/*
+     These functions are not related to compression but are exported
+   anyway because they might be useful in applications using the
+   compression library.
+*/
+
+ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
+
+/*
+     Update a running Adler-32 checksum with the bytes buf[0..len-1] and
+   return the updated checksum. If buf is NULL, this function returns
+   the required initial value for the checksum.
+   An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
+   much faster. Usage example:
+
+     uLong adler = adler32(0L, Z_NULL, 0);
+
+     while (read_buffer(buffer, length) != EOF) {
+       adler = adler32(adler, buffer, length);
+     }
+     if (adler != original_adler) error();
+*/
+
+ZEXTERN uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
+/*
+     Update a running crc with the bytes buf[0..len-1] and return the updated
+   crc. If buf is NULL, this function returns the required initial value
+   for the crc. Pre- and post-conditioning (one's complement) is performed
+   within this function so it shouldn't be done by the application.
+   Usage example:
+
+     uLong crc = crc32(0L, Z_NULL, 0);
+
+     while (read_buffer(buffer, length) != EOF) {
+       crc = crc32(crc, buffer, length);
+     }
+     if (crc != original_crc) error();
+*/
+
+
+                        /* various hacks, don't look :) */
+
+/* deflateInit and inflateInit are macros to allow checking the zlib version
+ * and the compiler's view of z_stream:
+ */
+ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
+                                     const char *version, int stream_size));
+ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
+                                     const char *version, int stream_size));
+ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
+                                      int windowBits, int memLevel,
+                                      int strategy, const char *version,
+                                      int stream_size));
+ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
+                                      const char *version, int stream_size));
+#define deflateInit(strm, level) \
+        deflateInit_((strm), (level),       ZLIB_VERSION, sizeof(z_stream))
+#define inflateInit(strm) \
+        inflateInit_((strm),                ZLIB_VERSION, sizeof(z_stream))
+#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
+        deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
+                      (strategy),           ZLIB_VERSION, sizeof(z_stream))
+#define inflateInit2(strm, windowBits) \
+        inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
+
+
+#if !defined(_Z_UTIL_H) && !defined(NO_DUMMY_DECL)
+    struct internal_state {int dummy;}; /* hack for buggy compilers */
+#endif
+
+ZEXTERN const char   * ZEXPORT zError           OF((int err));
+ZEXTERN int            ZEXPORT inflateSyncPoint OF((z_streamp z));
+ZEXTERN const uLongf * ZEXPORT get_crc_table    OF((void));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ZLIB_H */
diff --git a/common/zlib/zlib.html b/common/zlib/zlib.html
new file mode 100644
index 00000000..c3437038
--- /dev/null
+++ b/common/zlib/zlib.html
@@ -0,0 +1,971 @@
+<html>
+<head>
+ <title>
+ zlib general purpose compression library version 1.1.4
+ </title>
+</head>
+<body bgcolor="White" text="Black" vlink="Red" alink="Navy" link="Red">
+<!-- background="zlibbg.gif" -->
+
+<h1> zlib 1.1.4 Manual </h1>
+<hr>
+<a name="Contents"><h2>Contents</h2>
+<ol type="I">
+<li> <a href="#Prologue">Prologue</a>
+<li> <a href="#Introduction">Introduction</a>
+<li> <a href="#Utility functions">Utility functions</a>
+<li> <a href="#Basic functions">Basic functions</a>
+<li> <a href="#Advanced functions">Advanced functions</a>
+<li> <a href="#Constants">Constants</a>
+<li> <a href="#struct z_stream_s">struct z_stream_s</a>
+<li> <a href="#Checksum functions">Checksum functions</a>
+<li> <a href="#Misc">Misc</a>
+</ol>
+<hr>
+<a name="Prologue"><h2> Prologue </h2>
+  'zlib' general purpose compression library version 1.1.4, March 11th, 2002
+  <p>
+  Copyright (C) 1995-2002 Jean-loup Gailly and Mark Adler
+  <p>
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+  <p>
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+  <ol>
+   <li> The origin of this software must not be misrepresented ; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+   <li> Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+   <li> This notice may not be removed or altered from any source distribution.
+  </ol>
+
+  <dl>
+  <dt>Jean-loup Gailly        
+  <dd><a href="mailto:jloup@gzip.org">jloup@gzip.org</a>
+  <dt>Mark Adler
+  <dd><a href="mailto:madler@alumni.caltech.edu">madler@alumni.caltech.edu</a>
+  </dl>
+
+  The data format used by the zlib library is described by RFCs (Request for
+  Comments) 1950 to 1952 in the files
+  <a href="ftp://ds.internic.net/rfc/rfc1950.txt">
+  ftp://ds.internic.net/rfc/rfc1950.txt </a>
+  (zlib format), 
+  <a href="ftp://ds.internic.net/rfc/rfc1951.txt">
+  rfc1951.txt </a>
+  (<a href="#deflate">deflate</a> format) and 
+  <a href="ftp://ds.internic.net/rfc/rfc1952.txt">
+  rfc1952.txt </a>
+  (gzip format).
+  <p>
+  This manual is converted from zlib.h by 
+  <a href="mailto:piaip@csie.ntu.edu.tw"> piaip </a>
+  <p>
+  Visit <a href="http://ftp.cdrom.com/pub/infozip/zlib/">
+  http://ftp.cdrom.com/pub/infozip/zlib/</a> 
+  for the official zlib web page.
+  <p>
+
+<hr>
+<a name="Introduction"><h2> Introduction </h2>
+     The 'zlib' compression library provides in-memory compression and
+  decompression functions, including integrity checks of the uncompressed
+  data.  This version of the library supports only one compression method
+  (deflation) but other algorithms will be added later and will have the same
+  stream interface.
+  <p>
+
+     Compression can be done in a single step if the buffers are large
+  enough (for example if an input file is mmap'ed), or can be done by
+  repeated calls of the compression function.  In the latter case, the
+  application must provide more input and/or consume the output
+  (providing more output space) before each call.
+  <p>
+
+     The library also supports reading and writing files in gzip (.gz) format
+  with an interface similar to that of stdio.
+  <p>
+
+     The library does not install any signal handler. The decoder checks
+  the consistency of the compressed data, so the library should never
+  crash even in case of corrupted input.
+  <p>
+
+<hr>
+<a name="Utility functions"><h2> Utility functions </h2>
+     The following utility functions are implemented on top of the
+   <a href="#Basic functions">basic stream-oriented functions</a>. 
+   To simplify the interface, some
+   default options are assumed (compression level and memory usage,
+   standard memory allocation functions). The source code of these
+   utility functions can easily be modified if you need special options.
+<h3> Function list </h3>
+<ul>
+<li> int  <a href="#compress">compress</a> (Bytef *dest,   uLongf *destLen, const Bytef *source, uLong sourceLen);
+<li> int  <a href="#compress2">compress2</a> (Bytef *dest,   uLongf *destLen, const Bytef *source, uLong sourceLen, int level);
+<li> int  <a href="#uncompress">uncompress</a> (Bytef *dest,   uLongf *destLen, const Bytef *source, uLong sourceLen);
+<li> typedef voidp gzFile;
+<li>  gzFile  <a href="#gzopen">gzopen</a>  (const char *path, const char *mode);
+<li> gzFile  <a href="#gzdopen">gzdopen</a>  (int fd, const char *mode);
+<li> int  <a href="#gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);
+<li> int     <a href="#gzread">gzread</a>  (gzFile file, voidp buf, unsigned len);
+<li> int     <a href="#gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);
+<li> int VA   <a href="#gzprintf">gzprintf</a> (gzFile file, const char *format, ...);
+<li> int  <a href="#gzputs">gzputs</a> (gzFile file, const char *s);
+<li> char *  <a href="#gzgets">gzgets</a> (gzFile file, char *buf, int len);
+<li> int     <a href="#gzputc">gzputc</a> (gzFile file, int c);
+<li> int     <a href="#gzgetc">gzgetc</a> (gzFile file);
+<li> int     <a href="#gzflush">gzflush</a> (gzFile file, int flush);
+<li> z_off_t     <a href="#gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);
+<li> z_off_t     <a href="#gztell">gztell</a> (gzFile file);
+<li> int     <a href="#gzrewind">gzrewind</a> (gzFile file);
+<li> int  <a href="#gzeof">gzeof</a> (gzFile file);
+<li> int     <a href="#gzclose">gzclose</a> (gzFile file);
+<li> const char *  <a href="#gzerror">gzerror</a> (gzFile file, int *errnum);
+</ul>
+<h3> Function description </h3>
+<dl>
+<font color="Blue"><dt> int  <a name="compress">compress</a> (Bytef *dest,   uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
+<dd>
+     Compresses the source buffer into the destination buffer.  sourceLen is
+   the byte length of the source buffer. Upon entry, destLen is the total
+   size of the destination buffer, which must be at least 0.1% larger than
+   sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
+   compressed buffer.<p>
+     This function can be used to <a href="#compress">compress</a> a whole file at once if the
+   input file is mmap'ed.<p>
+     <a href="#compress">compress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+   enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
+   buffer.<p>
+
+<font color="Blue"><dt> int  <a name="compress2">compress2</a> (Bytef *dest,   uLongf *destLen, const Bytef *source, uLong sourceLen, int level);</font>
+<dd>
+     Compresses the source buffer into the destination buffer. The level
+   parameter has the same meaning as in <a href="#deflateInit">deflateInit</a>.  sourceLen is the byte
+   length of the source buffer. Upon entry, destLen is the total size of the
+   destination buffer, which must be at least 0.1% larger than sourceLen plus
+   12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
+   <p>
+
+     <a href="#compress2">compress2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
+   memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output buffer,
+   <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the level parameter is invalid.
+   <p>
+
+<font color="Blue"><dt> int  <a name="uncompress">uncompress</a> (Bytef *dest,   uLongf *destLen, const Bytef *source, uLong sourceLen);</font>
+<dd>
+     Decompresses the source buffer into the destination buffer.  sourceLen is
+   the byte length of the source buffer. Upon entry, destLen is the total
+   size of the destination buffer, which must be large enough to hold the
+   entire uncompressed data. (The size of the uncompressed data must have
+   been saved previously by the compressor and transmitted to the decompressor
+   by some mechanism outside the scope of this compression library.)
+   Upon exit, destLen is the actual size of the compressed buffer. <p>
+     This function can be used to decompress a whole file at once if the
+   input file is mmap'ed.
+   <p>
+
+     <a href="#uncompress">uncompress</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+   enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if there was not enough room in the output
+   buffer, or <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was corrupted.
+   <p>
+
+<dt> typedef voidp gzFile;
+<dd> <p>
+
+<font color="Blue"><dt>  gzFile  <a name="gzopen">gzopen</a>  (const char *path, const char *mode);</font>
+<dd>
+     Opens a gzip (.gz) file for reading or writing. The mode parameter
+   is as in fopen ("rb" or "wb") but can also include a compression level
+   ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
+   Huffman only compression as in "wb1h". (See the description
+   of <a href="#deflateInit2">deflateInit2</a> for more information about the strategy parameter.)
+   <p>
+
+     <a href="#gzopen">gzopen</a> can be used to read a file which is not in gzip format ; in this
+   case <a href="#gzread">gzread</a> will directly read from the file without decompression.
+   <p>
+
+     <a href="#gzopen">gzopen</a> returns NULL if the file could not be opened or if there was
+   insufficient memory to allocate the (de)compression <a href="#state">state</a> ; errno
+   can be checked to distinguish the two cases (if errno is zero, the
+   zlib error is <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a>).
+   <p>
+
+<font color="Blue"><dt> gzFile  <a name="gzdopen">gzdopen</a>  (int fd, const char *mode);</font>
+<dd>
+     <a href="#gzdopen">gzdopen</a>() associates a gzFile with the file descriptor fd.  File
+   descriptors are obtained from calls like open, dup, creat, pipe or
+   fileno (in the file has been previously opened with fopen).
+   The mode parameter is as in <a href="#gzopen">gzopen</a>.
+   <p>
+     The next call of <a href="#gzclose">gzclose</a> on the returned gzFile will also close the
+   file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
+   descriptor fd. If you want to keep fd open, use <a href="#gzdopen">gzdopen</a>(dup(fd), mode).
+   <p>
+     <a href="#gzdopen">gzdopen</a> returns NULL if there was insufficient memory to allocate
+   the (de)compression <a href="#state">state</a>.
+   <p>
+
+<font color="Blue"><dt> int  <a name="gzsetparams">gzsetparams</a> (gzFile file, int level, int strategy);</font>
+<dd>
+     Dynamically update the compression level or strategy. See the description
+   of <a href="#deflateInit2">deflateInit2</a> for the meaning of these parameters.
+   <p>
+     <a href="#gzsetparams">gzsetparams</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the file was not
+   opened for writing.
+   <p>
+
+<font color="Blue"><dt> int     <a name="gzread">gzread</a>  (gzFile file, voidp buf, unsigned len);</font>
+<dd>
+     Reads the given number of uncompressed bytes from the compressed file.
+   If the input file was not in gzip format, <a href="#gzread">gzread</a> copies the given number
+   of bytes into the buffer.
+   <p>
+     <a href="#gzread">gzread</a> returns the number of uncompressed bytes actually read (0 for
+   end of file, -1 for error).
+   <p>
+
+<font color="Blue"><dt> int     <a name="gzwrite">gzwrite</a> (gzFile file, const voidp buf, unsigned len);</font>
+<dd>
+     Writes the given number of uncompressed bytes into the compressed file.
+   <a href="#gzwrite">gzwrite</a> returns the number of uncompressed bytes actually written
+   (0 in case of error).
+   <p>
+
+<font color="Blue"><dt> int VA   <a name="gzprintf">gzprintf</a> (gzFile file, const char *format, ...);</font>
+<dd>
+     Converts, formats, and writes the args to the compressed file under
+   control of the format string, as in fprintf. <a href="#gzprintf">gzprintf</a> returns the number of
+   uncompressed bytes actually written (0 in case of error).
+   <p>
+
+<font color="Blue"><dt> int  <a name="gzputs">gzputs</a> (gzFile file, const char *s);</font>
+<dd>
+      Writes the given null-terminated string to the compressed file, excluding
+   the terminating null character.
+   <p>
+      <a href="#gzputs">gzputs</a> returns the number of characters written, or -1 in case of error.
+      <p>
+
+<font color="Blue"><dt> char *  <a name="gzgets">gzgets</a> (gzFile file, char *buf, int len);</font>
+<dd>
+      Reads bytes from the compressed file until len-1 characters are read, or
+   a newline character is read and transferred to buf, or an end-of-file
+   condition is encountered.  The string is then terminated with a null
+   character.
+   <p>
+      <a href="#gzgets">gzgets</a> returns buf, or <a href="#Z_NULL">Z_NULL</a> in case of error.
+      <p>
+
+<font color="Blue"><dt> int     <a name="gzputc">gzputc</a> (gzFile file, int c);</font>
+<dd>
+      Writes c, converted to an unsigned char, into the compressed file.
+   <a href="#gzputc">gzputc</a> returns the value that was written, or -1 in case of error.
+   <p>
+
+<font color="Blue"><dt> int     <a name="gzgetc">gzgetc</a> (gzFile file);</font>
+<dd>
+      Reads one byte from the compressed file. <a href="#gzgetc">gzgetc</a> returns this byte
+   or -1 in case of end of file or error.
+   <p>
+
+<font color="Blue"><dt> int     <a name="gzflush">gzflush</a> (gzFile file, int flush);</font>
+<dd>
+     Flushes all pending output into the compressed file. The parameter
+   flush is as in the <a href="#deflate">deflate</a>() function. The return value is the zlib
+   error number (see function <a href="#gzerror">gzerror</a> below). <a href="#gzflush">gzflush</a> returns <a href="#Z_OK">Z_OK</a> if
+   the flush parameter is <a href="#Z_FINISH">Z_FINISH</a> and all output could be flushed.
+   <p>
+     <a href="#gzflush">gzflush</a> should be called only when strictly necessary because it can
+   degrade compression.
+   <p>
+
+<font color="Blue"><dt> z_off_t     <a name="gzseek">gzseek</a> (gzFile file, z_off_t offset, int whence);</font>
+<dd>
+      Sets the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
+   given compressed file. The offset represents a number of bytes in the
+   uncompressed data stream. The whence parameter is defined as in lseek(2);
+   the value SEEK_END is not supported.
+   <p>
+     If the file is opened for reading, this function is emulated but can be
+   extremely slow. If the file is opened for writing, only forward seeks are
+   supported ; <a href="#gzseek">gzseek</a> then compresses a sequence of zeroes up to the new
+   starting position.
+   <p>
+      <a href="#gzseek">gzseek</a> returns the resulting offset location as measured in bytes from
+   the beginning of the uncompressed stream, or -1 in case of error, in
+   particular if the file is opened for writing and the new starting position
+   would be before the current position.
+   <p>
+
+<font color="Blue"><dt> int     <a name="gzrewind">gzrewind</a> (gzFile file);</font>
+<dd>
+     Rewinds the given file. This function is supported only for reading.
+     <p>
+   <a href="#gzrewind">gzrewind</a>(file) is equivalent to (int)<a href="#gzseek">gzseek</a>(file, 0L, SEEK_SET)
+   <p>
+
+<font color="Blue"><dt> z_off_t     <a name="gztell">gztell</a> (gzFile file);</font>
+<dd>
+     Returns the starting position for the next <a href="#gzread">gzread</a> or <a href="#gzwrite">gzwrite</a> on the
+   given compressed file. This position represents a number of bytes in the
+   uncompressed data stream.
+   <p>
+
+   <a href="#gztell">gztell</a>(file) is equivalent to <a href="#gzseek">gzseek</a>(file, 0L, SEEK_CUR)
+   <p>
+
+<font color="Blue"><dt> int  <a name="gzeof">gzeof</a> (gzFile file);</font>
+<dd>
+     Returns 1 when EOF has previously been detected reading the given
+   input stream, otherwise zero.
+   <p>
+
+<font color="Blue"><dt> int     <a name="gzclose">gzclose</a> (gzFile file);</font>
+<dd>
+     Flushes all pending output if necessary, closes the compressed file
+   and deallocates all the (de)compression <a href="#state">state</a>. The return value is the zlib
+   error number (see function <a href="#gzerror">gzerror</a> below).
+   <p>
+
+<font color="Blue"><dt> const char *  <a name="gzerror">gzerror</a> (gzFile file, int *errnum);</font>
+<dd>
+     Returns the error message for the last error which occurred on the
+   given compressed file. errnum is set to zlib error number. If an
+   error occurred in the file system and not in the compression library,
+   errnum is set to <a href="#Z_ERRNO">Z_ERRNO</a> and the application may consult errno
+   to get the exact error code.
+   <p>
+</dl>
+<hr>
+<a name="Basic functions"><h2> Basic functions </h2>
+<h3> Function list </h3>
+<ul>
+<li>  const char *  <a href="#zlibVersion">zlibVersion</a> (void);
+<li>  int  <a href="#deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);
+<li>  int  <a href="#deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
+<li>  int  <a href="#deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
+<li>  int  <a href="#inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);
+<li>  int  <a href="#inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);
+<li>  int  <a href="#inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);
+</ul>
+
+<h3> Function description </h3>
+<dl>
+<font color="Blue"><dt>  const char *  <a name="zlibVersion">zlibVersion</a> (void);</font>
+<dd> The application can compare <a href="#zlibVersion">zlibVersion</a> and ZLIB_VERSION for consistency.
+   If the first character differs, the library code actually used is
+   not compatible with the zlib.h header file used by the application.
+   This check is automatically made by <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a>.
+   <p>
+
+<font color="Blue"><dt> int  <a name="deflateInit">deflateInit</a> (<a href="#z_streamp">z_streamp</a> strm, int level);</font>
+<dd>
+     Initializes the internal stream <a href="#state">state</a> for compression. The fields
+   <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by the caller.
+   If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#deflateInit">deflateInit</a> updates them to
+   use default allocation functions.
+   <p>
+
+     The compression level must be <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a>, or between 0 and 9:
+   1 gives best speed, 9 gives best compression, 0 gives no compression at
+   all (the input data is simply copied a block at a time).
+   <p>
+
+   <a href="#Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a> requests a default compromise between speed and
+   compression (currently equivalent to level 6).
+   <p>
+
+     <a href="#deflateInit">deflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+   enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if level is not a valid compression level,
+   <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version (<a href="#zlib_version">zlib_version</a>) is incompatible
+   with the version assumed by the caller (ZLIB_VERSION).
+   <a href="#msg">msg</a> is set to null if there is no error message.  <a href="#deflateInit">deflateInit</a> does not
+   perform any compression: this will be done by <a href="#deflate">deflate</a>().
+   <p>
+
+<font color="Blue"><dt>  int  <a name="deflate">deflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
+<dd>
+    <a href="#deflate">deflate</a> compresses as much data as possible, and stops when the input
+  buffer becomes empty or the output buffer becomes full. It may introduce some
+  output latency (reading input without producing any output) except when
+  forced to flush.<p>
+
+    The detailed semantics are as follows. <a href="#deflate">deflate</a> performs one or both of the
+  following actions:
+
+  <ul>
+  <li> Compress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
+    accordingly. If not all input can be processed (because there is not
+    enough room in the output buffer), <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> are updated and
+    processing will resume at this point for the next call of <a href="#deflate">deflate</a>().
+
+  <li> 
+    Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a>
+    accordingly. This action is forced if the parameter flush is non zero.
+    Forcing flush frequently degrades the compression ratio, so this parameter
+    should be set only when necessary (in interactive applications).
+    Some output may be provided even if flush is not set.
+  </ul> <p>
+
+  Before the call of <a href="#deflate">deflate</a>(), the application should ensure that at least
+  one of the actions is possible, by providing more input and/or consuming
+  more output, and updating <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> accordingly ; <a href="#avail_out">avail_out</a>
+  should never be zero before the call. The application can consume the
+  compressed output when it wants, for example when the output buffer is full
+  (<a href="#avail_out">avail_out</a> == 0), or after each call of <a href="#deflate">deflate</a>(). If <a href="#deflate">deflate</a> returns <a href="#Z_OK">Z_OK</a>
+  and with zero <a href="#avail_out">avail_out</a>, it must be called again after making room in the
+  output buffer because there might be more output pending.
+  <p>
+
+    If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, all pending output is
+  flushed to the output buffer and the output is aligned on a byte boundary, so
+  that the decompressor can get all input data available so far. (In particular
+  <a href="#avail_in">avail_in</a> is zero after the call if enough output space has been provided
+  before the call.)  Flushing may degrade compression for some compression
+  algorithms and so it should be used only when necessary.
+  <p>
+
+    If flush is set to <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>, all output is flushed as with
+  <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, and the compression <a href="#state">state</a> is reset so that decompression can
+  restart from this point if previous compressed data has been damaged or if
+  random access is desired. Using <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a> too often can seriously degrade
+  the compression.
+  <p>
+
+    If <a href="#deflate">deflate</a> returns with <a href="#avail_out">avail_out</a> == 0, this function must be called again
+  with the same value of the flush parameter and more output space (updated
+  <a href="#avail_out">avail_out</a>), until the flush is complete (<a href="#deflate">deflate</a> returns with non-zero
+  <a href="#avail_out">avail_out</a>).
+  <p>
+
+    If the parameter flush is set to <a href="#Z_FINISH">Z_FINISH</a>, pending input is processed,
+  pending output is flushed and <a href="#deflate">deflate</a> returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> if there
+  was enough output space ; if <a href="#deflate">deflate</a> returns with <a href="#Z_OK">Z_OK</a>, this function must be
+  called again with <a href="#Z_FINISH">Z_FINISH</a> and more output space (updated <a href="#avail_out">avail_out</a>) but no
+  more input data, until it returns with <a href="#Z_STREAM_END">Z_STREAM_END</a> or an error. After
+  <a href="#deflate">deflate</a> has returned <a href="#Z_STREAM_END">Z_STREAM_END</a>, the only possible operations on the
+  stream are <a href="#deflateReset">deflateReset</a> or <a href="#deflateEnd">deflateEnd</a>.
+  <p>
+  
+    <a href="#Z_FINISH">Z_FINISH</a> can be used immediately after <a href="#deflateInit">deflateInit</a> if all the compression
+  is to be done in a single step. In this case, <a href="#avail_out">avail_out</a> must be at least
+  0.1% larger than <a href="#avail_in">avail_in</a> plus 12 bytes.  If <a href="#deflate">deflate</a> does not return
+  <a href="#Z_STREAM_END">Z_STREAM_END</a>, then it must be called again as described above.
+  <p>
+
+    <a href="#deflate">deflate</a>() sets strm-&gt <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all input read
+  so far (that is, <a href="#total_in">total_in</a> bytes).
+  <p>
+
+    <a href="#deflate">deflate</a>() may update <a href="#data_type">data_type</a> if it can make a good guess about
+  the input data type (<a href="#Z_ASCII">Z_ASCII</a> or <a href="#Z_BINARY">Z_BINARY</a>). In doubt, the data is considered
+  binary. This field is only for information purposes and does not affect
+  the compression algorithm in any manner.
+  <p>
+
+    <a href="#deflate">deflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input
+  processed or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if all input has been
+  consumed and all output has been produced (only when flush is set to
+  <a href="#Z_FINISH">Z_FINISH</a>), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a> was inconsistent (for example
+  if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible
+  (for example <a href="#avail_in">avail_in</a> or <a href="#avail_out">avail_out</a> was zero).
+  <p>
+
+<font color="Blue"><dt>  int  <a name="deflateEnd">deflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>
+     All dynamically allocated data structures for this stream are freed.
+   This function discards any unprocessed input and does not flush any
+   pending output.
+   <p>
+
+     <a href="#deflateEnd">deflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the
+   stream <a href="#state">state</a> was inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the stream was freed
+   prematurely (some input or output was discarded). In the error case,
+   <a href="#msg">msg</a> may be set but then points to a static string (which must not be
+   deallocated).
+   <p>
+
+<font color="Blue"><dt>  int  <a name="inflateInit">inflateInit</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>     
+	Initializes the internal stream <a href="#state">state</a> for decompression. The fields
+   <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
+   the caller. If <a href="#next_in">next_in</a> is not <a href="#Z_NULL">Z_NULL</a> and <a href="#avail_in">avail_in</a> is large enough (the exact
+   value depends on the compression method), <a href="#inflateInit">inflateInit</a> determines the
+   compression method from the zlib header and allocates all data structures
+   accordingly ; otherwise the allocation will be deferred to the first call of
+   <a href="#inflate">inflate</a>.  If <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> are set to <a href="#Z_NULL">Z_NULL</a>, <a href="#inflateInit">inflateInit</a> updates them to
+   use default allocation functions.
+   <p>
+
+     <a href="#inflateInit">inflateInit</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
+   memory, <a href="#Z_VERSION_ERROR">Z_VERSION_ERROR</a> if the zlib library version is incompatible with the
+   version assumed by the caller.  <a href="#msg">msg</a> is set to null if there is no error
+   message. <a href="#inflateInit">inflateInit</a> does not perform any decompression apart from reading
+   the zlib header if present: this will be done by <a href="#inflate">inflate</a>().  (So <a href="#next_in">next_in</a> and
+   <a href="#avail_in">avail_in</a> may be modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)
+   <p>
+
+<font color="Blue"><dt>  int  <a name="inflate">inflate</a> (<a href="#z_streamp">z_streamp</a> strm, int flush);</font>
+<dd>
+    <a href="#inflate">inflate</a> decompresses as much data as possible, and stops when the input
+  buffer becomes empty or the output buffer becomes full. It may some
+  introduce some output latency (reading input without producing any output)
+  except when forced to flush.
+  <p>
+
+  The detailed semantics are as follows. <a href="#inflate">inflate</a> performs one or both of the
+  following actions:
+
+  <ul>
+  <li> Decompress more input starting at <a href="#next_in">next_in</a> and update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a>
+    accordingly. If not all input can be processed (because there is not
+    enough room in the output buffer), <a href="#next_in">next_in</a> is updated and processing
+    will resume at this point for the next call of <a href="#inflate">inflate</a>().
+
+  <li> Provide more output starting at <a href="#next_out">next_out</a> and update <a href="#next_out">next_out</a> and 
+    <a href="#avail_out">avail_out</a> accordingly.  <a href="#inflate">inflate</a>() provides as much output as possible, 
+    until there is no more input data or no more space in the output buffer 
+    (see below about the flush parameter).
+  </ul> <p>
+
+  Before the call of <a href="#inflate">inflate</a>(), the application should ensure that at least
+  one of the actions is possible, by providing more input and/or consuming
+  more output, and updating the next_* and avail_* values accordingly.
+  The application can consume the uncompressed output when it wants, for
+  example when the output buffer is full (<a href="#avail_out">avail_out</a> == 0), or after each
+  call of <a href="#inflate">inflate</a>(). If <a href="#inflate">inflate</a> returns <a href="#Z_OK">Z_OK</a> and with zero <a href="#avail_out">avail_out</a>, it
+  must be called again after making room in the output buffer because there
+  might be more output pending.
+  <p>
+
+    If the parameter flush is set to <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>, <a href="#inflate">inflate</a> flushes as much
+  output as possible to the output buffer. The flushing behavior of <a href="#inflate">inflate</a> is
+  not specified for values of the flush parameter other than <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>
+  and <a href="#Z_FINISH">Z_FINISH</a>, but the current implementation actually flushes as much output
+  as possible anyway.
+  <p>
+
+    <a href="#inflate">inflate</a>() should normally be called until it returns <a href="#Z_STREAM_END">Z_STREAM_END</a> or an
+  error. However if all decompression is to be performed in a single step
+  (a single call of <a href="#inflate">inflate</a>), the parameter flush should be set to
+  <a href="#Z_FINISH">Z_FINISH</a>. In this case all pending input is processed and all pending
+  output is flushed ; <a href="#avail_out">avail_out</a> must be large enough to hold all the
+  uncompressed data. (The size of the uncompressed data may have been saved
+  by the compressor for this purpose.) The next operation on this stream must
+  be <a href="#inflateEnd">inflateEnd</a> to deallocate the decompression <a href="#state">state</a>. The use of <a href="#Z_FINISH">Z_FINISH</a>
+  is never required, but can be used to inform <a href="#inflate">inflate</a> that a faster routine
+  may be used for the single <a href="#inflate">inflate</a>() call.
+  <p>
+
+     If a preset dictionary is needed at this point (see <a href="#inflateSetDictionary">inflateSetDictionary</a>
+  below), <a href="#inflate">inflate</a> sets strm-<a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of the
+  dictionary chosen by the compressor and returns <a href="#Z_NEED_DICT">Z_NEED_DICT</a> ; otherwise 
+  it sets strm-&gt <a href="#adler">adler</a> to the <a href="#adler32">adler32</a> checksum of all output produced
+  so far (that is, <a href="#total_out">total_out</a> bytes) and returns <a href="#Z_OK">Z_OK</a>, <a href="#Z_STREAM_END">Z_STREAM_END</a> or
+  an error code as described below. At the end of the stream, <a href="#inflate">inflate</a>()
+  checks that its computed <a href="#adler32">adler32</a> checksum is equal to that saved by the
+  compressor and returns <a href="#Z_STREAM_END">Z_STREAM_END</a> only if the checksum is correct.
+  <p>
+
+    <a href="#inflate">inflate</a>() returns <a href="#Z_OK">Z_OK</a> if some progress has been made (more input processed
+  or more output produced), <a href="#Z_STREAM_END">Z_STREAM_END</a> if the end of the compressed data has
+  been reached and all uncompressed output has been produced, <a href="#Z_NEED_DICT">Z_NEED_DICT</a> if a
+  preset dictionary is needed at this point, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the input data was
+  corrupted (input stream not conforming to the zlib format or incorrect
+  <a href="#adler32">adler32</a> checksum), <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent
+  (for example if <a href="#next_in">next_in</a> or <a href="#next_out">next_out</a> was NULL), <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+  enough memory, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a> if no progress is possible or if there was not
+  enough room in the output buffer when <a href="#Z_FINISH">Z_FINISH</a> is used. In the <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a>
+  case, the application may then call <a href="#inflateSync">inflateSync</a> to look for a good
+  compression block.
+  <p>
+
+<font color="Blue"><dt>  int  <a name="inflateEnd">inflateEnd</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>
+     All dynamically allocated data structures for this stream are freed.
+   This function discards any unprocessed input and does not flush any
+   pending output.
+   <p>
+
+     <a href="#inflateEnd">inflateEnd</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream <a href="#state">state</a>
+   was inconsistent. In the error case, <a href="#msg">msg</a> may be set but then points to a
+   static string (which must not be deallocated).
+</dl>
+<hr>
+<a name="Advanced functions"><h2> Advanced functions </h2>
+    The following functions are needed only in some special applications.
+<h3> Function list </h3>
+<ul>
+<li>  int  <a href="#deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm,
+<li> int  <a href="#deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt  dictLength);
+<li> int  <a href="#deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);
+<li> int  <a href="#deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
+<li> int  <a href="#deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);
+<li> int  <a href="#inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int  windowBits);
+<li>  int  <a href="#inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt  dictLength);
+<li> int  <a href="#inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);
+<li> int  <a href="#inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);
+
+</ul>
+<h3> Function description </h3>
+<dl>
+<font color="Blue"><dt>  int  <a name="deflateInit2">deflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int  level, int  method, int  windowBits, int  memLevel, int  strategy);</font>
+
+<dd> This is another version of <a href="#deflateInit">deflateInit</a> with more compression options. The
+   fields <a href="#next_in">next_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized before by
+   the caller.<p>
+
+     The method parameter is the compression method. It must be <a href="#Z_DEFLATED">Z_DEFLATED</a> in
+   this version of the library.<p>
+
+     The windowBits parameter is the base two logarithm of the window size
+   (the size of the history buffer).  It should be in the range 8..15 for this
+   version of the library. Larger values of this parameter result in better
+   compression at the expense of memory usage. The default value is 15 if
+   <a href="#deflateInit">deflateInit</a> is used instead.<p>
+
+     The memLevel parameter specifies how much memory should be allocated
+   for the internal compression <a href="#state">state</a>. memLevel=1 uses minimum memory but
+   is slow and reduces compression ratio ; memLevel=9 uses maximum memory
+   for optimal speed. The default value is 8. See zconf.h for total memory
+   usage as a function of windowBits and memLevel.<p>
+
+     The strategy parameter is used to tune the compression algorithm. Use the
+   value <a href="#Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a> for normal data, <a href="#Z_FILTERED">Z_FILTERED</a> for data produced by a
+   filter (or predictor), or <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a> to force Huffman encoding only (no
+   string match).  Filtered data consists mostly of small values with a
+   somewhat random distribution. In this case, the compression algorithm is
+   tuned to <a href="#compress">compress</a> them better. The effect of <a href="#Z_FILTERED">Z_FILTERED</a> is to force more
+   Huffman coding and less string matching ; it is somewhat intermediate
+   between Z_DEFAULT and <a href="#Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a>. The strategy parameter only affects
+   the compression ratio but not the correctness of the compressed output even
+   if it is not set appropriately.<p>
+
+      <a href="#deflateInit2">deflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
+   memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as an invalid
+   method). <a href="#msg">msg</a> is set to null if there is no error message.  <a href="#deflateInit2">deflateInit2</a> does
+   not perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
+                            
+<font color="Blue"><dt> int  <a name="deflateSetDictionary">deflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt  dictLength);</font>
+<dd>
+     Initializes the compression dictionary from the given byte sequence
+   without producing any compressed output. This function must be called
+   immediately after <a href="#deflateInit">deflateInit</a>, <a href="#deflateInit2">deflateInit2</a> or <a href="#deflateReset">deflateReset</a>, before any
+   call of <a href="#deflate">deflate</a>. The compressor and decompressor must use exactly the same
+   dictionary (see <a href="#inflateSetDictionary">inflateSetDictionary</a>).<p>
+
+     The dictionary should consist of strings (byte sequences) that are likely
+   to be encountered later in the data to be compressed, with the most commonly
+   used strings preferably put towards the end of the dictionary. Using a
+   dictionary is most useful when the data to be compressed is short and can be
+   predicted with good accuracy ; the data can then be compressed better than
+   with the default empty dictionary.<p>
+
+     Depending on the size of the compression data structures selected by
+   <a href="#deflateInit">deflateInit</a> or <a href="#deflateInit2">deflateInit2</a>, a part of the dictionary may in effect be
+   discarded, for example if the dictionary is larger than the window size in
+   <a href="#deflate">deflate</a> or deflate2. Thus the strings most likely to be useful should be
+   put at the end of the dictionary, not at the front.<p>
+
+     Upon return of this function, strm-&gt <a href="#adler">adler</a> is set to the Adler32 value
+   of the dictionary ; the decompressor may later use this value to determine
+   which dictionary has been used by the compressor. (The Adler32 value
+   applies to the whole dictionary even if only a subset of the dictionary is
+   actually used by the compressor.)<p>
+
+     <a href="#deflateSetDictionary">deflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
+   parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
+   inconsistent (for example if <a href="#deflate">deflate</a> has already been called for this stream
+   or if the compression method is bsort). <a href="#deflateSetDictionary">deflateSetDictionary</a> does not
+   perform any compression: this will be done by <a href="#deflate">deflate</a>().<p>
+
+<font color="Blue"><dt> int  <a name="deflateCopy">deflateCopy</a> (<a href="#z_streamp">z_streamp</a> dest, <a href="#z_streamp">z_streamp</a> source);</font>
+<dd>
+     Sets the destination stream as a complete copy of the source stream.<p>
+
+     This function can be useful when several compression strategies will be
+   tried, for example when there are several ways of pre-processing the input
+   data with a filter. The streams that will be discarded should then be freed
+   by calling <a href="#deflateEnd">deflateEnd</a>.  Note that <a href="#deflateCopy">deflateCopy</a> duplicates the internal
+   compression <a href="#state">state</a> which can be quite large, so this strategy is slow and
+   can consume lots of memory.<p>
+
+     <a href="#deflateCopy">deflateCopy</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not
+   enough memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source stream <a href="#state">state</a> was inconsistent
+   (such as <a href="#zalloc">zalloc</a> being NULL). <a href="#msg">msg</a> is left unchanged in both source and
+   destination.<p>
+
+<font color="Blue"><dt> int  <a name="deflateReset">deflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>     This function is equivalent to <a href="#deflateEnd">deflateEnd</a> followed by <a href="#deflateInit">deflateInit</a>,
+   but does not free and reallocate all the internal compression <a href="#state">state</a>.
+   The stream will keep the same compression level and any other attributes
+   that may have been set by <a href="#deflateInit2">deflateInit2</a>.<p>
+
+      <a href="#deflateReset">deflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
+   stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).<p>
+
+<font color="Blue"><dt> int  <a name="deflateParams">deflateParams</a> (<a href="#z_streamp">z_streamp</a> strm, int level, int strategy);</font>
+<dd>
+     Dynamically update the compression level and compression strategy.  The
+   interpretation of level and strategy is as in <a href="#deflateInit2">deflateInit2</a>.  This can be
+   used to switch between compression and straight copy of the input data, or
+   to switch to a different kind of input data requiring a different
+   strategy. If the compression level is changed, the input available so far
+   is compressed with the old level (and may be flushed); the new level will
+   take effect only at the next call of <a href="#deflate">deflate</a>().<p>
+
+     Before the call of <a href="#deflateParams">deflateParams</a>, the stream <a href="#state">state</a> must be set as for
+   a call of <a href="#deflate">deflate</a>(), since the currently available input may have to
+   be compressed and flushed. In particular, strm-&gt <a href="#avail_out">avail_out</a> must be 
+   non-zero.<p>
+
+     <a href="#deflateParams">deflateParams</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
+   stream <a href="#state">state</a> was inconsistent or if a parameter was invalid, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
+   if strm-&gtavail_out was zero.<p>
+
+<font color="Blue"><dt> int  <a name="inflateInit2">inflateInit2</a> (<a href="#z_streamp">z_streamp</a> strm, int  windowBits);</font>
+
+<dd>     This is another version of <a href="#inflateInit">inflateInit</a> with an extra parameter. The
+   fields <a href="#next_in">next_in</a>, <a href="#avail_in">avail_in</a>, <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and <a href="#opaque">opaque</a> must be initialized
+   before by the caller.<p>
+
+     The windowBits parameter is the base two logarithm of the maximum window
+   size (the size of the history buffer).  It should be in the range 8..15 for
+   this version of the library. The default value is 15 if <a href="#inflateInit">inflateInit</a> is used
+   instead. If a compressed stream with a larger window size is given as
+   input, <a href="#inflate">inflate</a>() will return with the error code <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> instead of
+   trying to allocate a larger window.<p>
+
+      <a href="#inflateInit2">inflateInit2</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_MEM_ERROR">Z_MEM_ERROR</a> if there was not enough
+   memory, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a parameter is invalid (such as a negative
+   memLevel). <a href="#msg">msg</a> is set to null if there is no error message.  <a href="#inflateInit2">inflateInit2</a>
+   does not perform any decompression apart from reading the zlib header if
+   present: this will be done by <a href="#inflate">inflate</a>(). (So <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> may be
+   modified, but <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> are unchanged.)<p>
+
+<font color="Blue"><dt>  int  <a name="inflateSetDictionary">inflateSetDictionary</a> (<a href="#z_streamp">z_streamp</a> strm, const Bytef *dictionary, uInt  dictLength);</font>
+<dd>
+     Initializes the decompression dictionary from the given uncompressed byte
+   sequence. This function must be called immediately after a call of <a href="#inflate">inflate</a>
+   if this call returned <a href="#Z_NEED_DICT">Z_NEED_DICT</a>. The dictionary chosen by the compressor
+   can be determined from the Adler32 value returned by this call of
+   <a href="#inflate">inflate</a>. The compressor and decompressor must use exactly the same
+   dictionary (see <a href="#deflateSetDictionary">deflateSetDictionary</a>).<p>
+
+     <a href="#inflateSetDictionary">inflateSetDictionary</a> returns <a href="#Z_OK">Z_OK</a> if success, <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if a
+   parameter is invalid (such as NULL dictionary) or the stream <a href="#state">state</a> is
+   inconsistent, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if the given dictionary doesn't match the
+   expected one (incorrect Adler32 value). <a href="#inflateSetDictionary">inflateSetDictionary</a> does not
+   perform any decompression: this will be done by subsequent calls of
+   <a href="#inflate">inflate</a>().<p>
+
+<font color="Blue"><dt> int  <a name="inflateSync">inflateSync</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+
+<dd>    Skips invalid compressed data until a full flush point (see above the
+  description of <a href="#deflate">deflate</a> with <a href="#Z_FULL_FLUSH">Z_FULL_FLUSH</a>) can be found, or until all
+  available input is skipped. No output is provided.<p>
+
+    <a href="#inflateSync">inflateSync</a> returns <a href="#Z_OK">Z_OK</a> if a full flush point has been found, <a href="#Z_BUF_ERROR">Z_BUF_ERROR</a>
+  if no more input was provided, <a href="#Z_DATA_ERROR">Z_DATA_ERROR</a> if no flush point has been found,
+  or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the stream structure was inconsistent. In the success
+  case, the application may save the current current value of <a href="#total_in">total_in</a> which
+  indicates where valid compressed data was found. In the error case, the
+  application may repeatedly call <a href="#inflateSync">inflateSync</a>, providing more input each time,
+  until success or end of the input data.<p>
+
+<font color="Blue"><dt> int  <a name="inflateReset">inflateReset</a> (<a href="#z_streamp">z_streamp</a> strm);</font>
+<dd>
+     This function is equivalent to <a href="#inflateEnd">inflateEnd</a> followed by <a href="#inflateInit">inflateInit</a>,
+   but does not free and reallocate all the internal decompression <a href="#state">state</a>.
+   The stream will keep attributes that may have been set by <a href="#inflateInit2">inflateInit2</a>.
+   <p>
+
+      <a href="#inflateReset">inflateReset</a> returns <a href="#Z_OK">Z_OK</a> if success, or <a href="#Z_STREAM_ERROR">Z_STREAM_ERROR</a> if the source
+   stream <a href="#state">state</a> was inconsistent (such as <a href="#zalloc">zalloc</a> or <a href="#state">state</a> being NULL).
+   <p>
+</dl>
+
+<hr>
+<a name="Checksum functions"><h2> Checksum functions </h2>
+     These functions are not related to compression but are exported
+   anyway because they might be useful in applications using the
+   compression library.
+<h3> Function list </h3>
+<ul>
+<li> uLong  <a href="#adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);
+<li> uLong  <a href="#crc32">crc32</a>   (uLong crc, const Bytef *buf, uInt len);
+</ul>
+<h3> Function description </h3>
+<dl>
+<font color="Blue"><dt> uLong  <a name="adler32">adler32</a> (uLong <a href="#adler">adler</a>, const Bytef *buf, uInt len);</font>
+<dd>
+     Update a running Adler-32 checksum with the bytes buf[0..len-1] and
+   return the updated checksum. If buf is NULL, this function returns
+   the required initial value for the checksum.
+   <p>
+   An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
+   much faster. Usage example:
+   <pre>
+
+     uLong <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
+
+     while (read_buffer(buffer, length) != EOF) {
+       <a href="#adler">adler</a> = <a href="#adler32">adler32</a>(<a href="#adler">adler</a>, buffer, length);
+     }
+     if (<a href="#adler">adler</a> != original_adler) error();
+   </pre>
+
+<font color="Blue"><dt> uLong  <a name="crc32">crc32</a>   (uLong crc, const Bytef *buf, uInt len);</font>
+<dd>
+     Update a running crc with the bytes buf[0..len-1] and return the updated
+   crc. If buf is NULL, this function returns the required initial value
+   for the crc. Pre- and post-conditioning (one's complement) is performed
+   within this function so it shouldn't be done by the application.
+   Usage example:
+   <pre>
+
+     uLong crc = <a href="#crc32">crc32</a>(0L, <a href="#Z_NULL">Z_NULL</a>, 0);
+
+     while (read_buffer(buffer, length) != EOF) {
+       crc = <a href="#crc32">crc32</a>(crc, buffer, length);
+     }
+     if (crc != original_crc) error();
+   </pre>
+</dl>
+<hr>
+<a name="struct z_stream_s"><h2> struct z_stream_s </h2>
+<font color="Blue">
+<a name="z_stream_s">
+<pre>
+typedef struct z_stream_s {
+    Bytef    *<a name="next_in">next_in</a>;  /* next input byte */
+    uInt     <a name="avail_in">avail_in</a>;  /* number of bytes available at <a href="#next_in">next_in</a> */
+    uLong    <a name="total_in">total_in</a>;  /* total nb of input bytes read so far */
+
+    Bytef    *<a name="next_out">next_out</a>; /* next output byte should be put there */
+    uInt     <a name="avail_out">avail_out</a>; /* remaining free space at <a href="#next_out">next_out</a> */
+    uLong    <a name="total_out">total_out</a>; /* total nb of bytes output so far */
+
+    char     *<a name="msg">msg</a>;      /* last error message, NULL if no error */
+    struct internal_state FAR *<a name="state">state</a>; /* not visible by applications */
+
+    alloc_func <a name="zalloc">zalloc</a>;  /* used to allocate the internal <a href="#state">state</a> */
+    free_func  <a name="zfree">zfree</a>;   /* used to free the internal <a href="#state">state</a> */
+    voidpf     <a name="opaque">opaque</a>;  /* private data object passed to <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> */
+
+    int     <a name="data_type">data_type</a>;  /* best guess about the data type: ascii or binary */
+    uLong   <a name="adler">adler</a>;      /* <a href="#adler32">adler32</a> value of the uncompressed data */
+    uLong   <a name="reserved">reserved</a>;   /* <a href="#reserved">reserved</a> for future use */
+} <a href="#z_stream_s">z_stream</a> ;
+
+typedef <a href="#z_stream_s">z_stream</a> FAR * <a name="z_streamp">z_streamp</a>;  ÿ 
+</pre>
+</font>
+   The application must update <a href="#next_in">next_in</a> and <a href="#avail_in">avail_in</a> when <a href="#avail_in">avail_in</a> has
+   dropped to zero. It must update <a href="#next_out">next_out</a> and <a href="#avail_out">avail_out</a> when <a href="#avail_out">avail_out</a>
+   has dropped to zero. The application must initialize <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a> and
+   <a href="#opaque">opaque</a> before calling the init function. All other fields are set by the
+   compression library and must not be updated by the application. <p>
+
+   The <a href="#opaque">opaque</a> value provided by the application will be passed as the first
+   parameter for calls of <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a>. This can be useful for custom
+   memory management. The compression library attaches no meaning to the
+   <a href="#opaque">opaque</a> value. <p>
+
+   <a href="#zalloc">zalloc</a> must return <a href="#Z_NULL">Z_NULL</a> if there is not enough memory for the object.
+   If zlib is used in a multi-threaded application, <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be
+   thread safe. <p>
+
+   On 16-bit systems, the functions <a href="#zalloc">zalloc</a> and <a href="#zfree">zfree</a> must be able to allocate
+   exactly 65536 bytes, but will not be required to allocate more than this
+   if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
+   pointers returned by <a href="#zalloc">zalloc</a> for objects of exactly 65536 bytes *must*
+   have their offset normalized to zero. The default allocation function
+   provided by this library ensures this (see zutil.c). To reduce memory
+   requirements and avoid any allocation of 64K objects, at the expense of
+   compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
+   <p>
+
+   The fields <a href="#total_in">total_in</a> and <a href="#total_out">total_out</a> can be used for statistics or
+   progress reports. After compression, <a href="#total_in">total_in</a> holds the total size of
+   the uncompressed data and may be saved for use in the decompressor
+   (particularly if the decompressor wants to decompress everything in
+   a single step). <p>
+
+<hr>
+<a name="Constants"><h2> Constants </h2>
+<font color="Blue">
+<pre>
+#define <a name="Z_NO_FLUSH">Z_NO_FLUSH</a>      0
+#define <a name="Z_PARTIAL_FLUSH">Z_PARTIAL_FLUSH</a> 1 
+	/* will be removed, use <a href="#Z_SYNC_FLUSH">Z_SYNC_FLUSH</a> instead */
+#define <a name="Z_SYNC_FLUSH">Z_SYNC_FLUSH</a>    2
+#define <a name="Z_FULL_FLUSH">Z_FULL_FLUSH</a>    3
+#define <a name="Z_FINISH">Z_FINISH</a>        4
+/* Allowed flush values ; see <a href="#deflate">deflate</a>() below for details */
+
+#define <a name="Z_OK">Z_OK</a>            0
+#define <a name="Z_STREAM_END">Z_STREAM_END</a>    1
+#define <a name="Z_NEED_DICT">Z_NEED_DICT</a>     2
+#define <a name="Z_ERRNO">Z_ERRNO</a>        (-1)
+#define <a name="Z_STREAM_ERROR">Z_STREAM_ERROR</a> (-2)
+#define <a name="Z_DATA_ERROR">Z_DATA_ERROR</a>   (-3)
+#define <a name="Z_MEM_ERROR">Z_MEM_ERROR</a>    (-4)
+#define <a name="Z_BUF_ERROR">Z_BUF_ERROR</a>    (-5)
+#define <a name="Z_VERSION_ERROR">Z_VERSION_ERROR</a> (-6)
+/* Return codes for the compression/decompression functions. Negative
+ * values are errors, positive values are used for special but normal events.
+ */
+
+#define <a name="Z_NO_COMPRESSION">Z_NO_COMPRESSION</a>         0
+#define <a name="Z_BEST_SPEED">Z_BEST_SPEED</a>             1
+#define <a name="Z_BEST_COMPRESSION">Z_BEST_COMPRESSION</a>       9
+#define <a name="Z_DEFAULT_COMPRESSION">Z_DEFAULT_COMPRESSION</a>  (-1)
+/* compression levels */
+
+#define <a name="Z_FILTERED">Z_FILTERED</a>            1
+#define <a name="Z_HUFFMAN_ONLY">Z_HUFFMAN_ONLY</a>        2
+#define <a name="Z_DEFAULT_STRATEGY">Z_DEFAULT_STRATEGY</a>    0
+/* compression strategy ; see <a href="#deflateInit2">deflateInit2</a>() below for details */
+
+#define <a name="Z_BINARY">Z_BINARY</a>   0
+#define <a name="Z_ASCII">Z_ASCII</a>    1
+#define <a name="Z_UNKNOWN">Z_UNKNOWN</a>  2
+/* Possible values of the <a href="#data_type">data_type</a> field */
+
+#define <a name="Z_DEFLATED">Z_DEFLATED</a>   8
+/* The <a href="#deflate">deflate</a> compression method (the only one supported in this version) */
+
+#define <a name="Z_NULL">Z_NULL</a>  0  /* for initializing <a href="#zalloc">zalloc</a>, <a href="#zfree">zfree</a>, <a href="#opaque">opaque</a> */
+
+#define <a name="zlib_version">zlib_version</a> <a href="#zlibVersion">zlibVersion</a>()
+/* for compatibility with versions less than 1.0.2 */
+</pre>
+</font>
+
+<hr>
+<a name="Misc"><h2> Misc </h2>
+ <a href="#deflateInit">deflateInit</a> and <a href="#inflateInit">inflateInit</a> are macros to allow checking the zlib version
+ and the compiler's view of <a href="#z_stream_s">z_stream</a>.
+ <p>
+ Other functions:
+ <dl>
+ <font color="Blue"><dt> const char   *  <a name="zError">zError</a>           (int err);</font>
+ <font color="Blue"><dt> int             <a name="inflateSyncPoint">inflateSyncPoint</a> (<a href="#z_streamp">z_streamp</a> z);</font>
+ <font color="Blue"><dt> const uLongf *  <a name="get_crc_table">get_crc_table</a>    (void);</font>
+ </dl>
+ <hr>
+ <font size="-1">
+ Last update: Wed Oct 13 20:42:34 1999<br>
+ piapi@csie.ntu.edu.tw
+ </font>
+
+</body>
+</html>
diff --git a/common/zlib/zutil.c b/common/zlib/zutil.c
new file mode 100644
index 00000000..65beb591
--- /dev/null
+++ b/common/zlib/zutil.c
@@ -0,0 +1,225 @@
+/* zutil.c -- target dependent utility functions for the compression library
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* @(#) $Id: zutil.c,v 1.1 2004/10/08 09:44:28 const_k Exp $ */
+
+#include "zutil.h"
+
+struct internal_state      {int dummy;}; /* for buggy compilers */
+
+#ifndef STDC
+extern void exit OF((int));
+#endif
+
+const char *z_errmsg[10] = {
+"need dictionary",     /* Z_NEED_DICT       2  */
+"stream end",          /* Z_STREAM_END      1  */
+"",                    /* Z_OK              0  */
+"file error",          /* Z_ERRNO         (-1) */
+"stream error",        /* Z_STREAM_ERROR  (-2) */
+"data error",          /* Z_DATA_ERROR    (-3) */
+"insufficient memory", /* Z_MEM_ERROR     (-4) */
+"buffer error",        /* Z_BUF_ERROR     (-5) */
+"incompatible version",/* Z_VERSION_ERROR (-6) */
+""};
+
+
+const char * ZEXPORT zlibVersion()
+{
+    return ZLIB_VERSION;
+}
+
+#ifdef DEBUG
+
+#  ifndef verbose
+#    define verbose 0
+#  endif
+int z_verbose = verbose;
+
+void z_error (m)
+    char *m;
+{
+    fprintf(stderr, "%s\n", m);
+    exit(1);
+}
+#endif
+
+/* exported to allow conversion of error code to string for compress() and
+ * uncompress()
+ */
+const char * ZEXPORT zError(err)
+    int err;
+{
+    return ERR_MSG(err);
+}
+
+
+#ifndef HAVE_MEMCPY
+
+void zmemcpy(dest, source, len)
+    Bytef* dest;
+    const Bytef* source;
+    uInt  len;
+{
+    if (len == 0) return;
+    do {
+        *dest++ = *source++; /* ??? to be unrolled */
+    } while (--len != 0);
+}
+
+int zmemcmp(s1, s2, len)
+    const Bytef* s1;
+    const Bytef* s2;
+    uInt  len;
+{
+    uInt j;
+
+    for (j = 0; j < len; j++) {
+        if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
+    }
+    return 0;
+}
+
+void zmemzero(dest, len)
+    Bytef* dest;
+    uInt  len;
+{
+    if (len == 0) return;
+    do {
+        *dest++ = 0;  /* ??? to be unrolled */
+    } while (--len != 0);
+}
+#endif
+
+#ifdef __TURBOC__
+#if (defined( __BORLANDC__) || !defined(SMALL_MEDIUM)) && !defined(__32BIT__)
+/* Small and medium model in Turbo C are for now limited to near allocation
+ * with reduced MAX_WBITS and MAX_MEM_LEVEL
+ */
+#  define MY_ZCALLOC
+
+/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
+ * and farmalloc(64K) returns a pointer with an offset of 8, so we
+ * must fix the pointer. Warning: the pointer must be put back to its
+ * original form in order to free it, use zcfree().
+ */
+
+#define MAX_PTR 10
+/* 10*64K = 640K */
+
+local int next_ptr = 0;
+
+typedef struct ptr_table_s {
+    voidpf org_ptr;
+    voidpf new_ptr;
+} ptr_table;
+
+local ptr_table table[MAX_PTR];
+/* This table is used to remember the original form of pointers
+ * to large buffers (64K). Such pointers are normalized with a zero offset.
+ * Since MSDOS is not a preemptive multitasking OS, this table is not
+ * protected from concurrent access. This hack doesn't work anyway on
+ * a protected system like OS/2. Use Microsoft C instead.
+ */
+
+voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
+{
+    voidpf buf = opaque; /* just to make some compilers happy */
+    ulg bsize = (ulg)items*size;
+
+    /* If we allocate less than 65520 bytes, we assume that farmalloc
+     * will return a usable pointer which doesn't have to be normalized.
+     */
+    if (bsize < 65520L) {
+        buf = farmalloc(bsize);
+        if (*(ush*)&buf != 0) return buf;
+    } else {
+        buf = farmalloc(bsize + 16L);
+    }
+    if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
+    table[next_ptr].org_ptr = buf;
+
+    /* Normalize the pointer to seg:0 */
+    *((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
+    *(ush*)&buf = 0;
+    table[next_ptr++].new_ptr = buf;
+    return buf;
+}
+
+void  zcfree (voidpf opaque, voidpf ptr)
+{
+    int n;
+    if (*(ush*)&ptr != 0) { /* object < 64K */
+        farfree(ptr);
+        return;
+    }
+    /* Find the original pointer */
+    for (n = 0; n < next_ptr; n++) {
+        if (ptr != table[n].new_ptr) continue;
+
+        farfree(table[n].org_ptr);
+        while (++n < next_ptr) {
+            table[n-1] = table[n];
+        }
+        next_ptr--;
+        return;
+    }
+    ptr = opaque; /* just to make some compilers happy */
+    Assert(0, "zcfree: ptr not found");
+}
+#endif
+#endif /* __TURBOC__ */
+
+
+#if defined(M_I86) && !defined(__32BIT__)
+/* Microsoft C in 16-bit mode */
+
+#  define MY_ZCALLOC
+
+#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
+#  define _halloc  halloc
+#  define _hfree   hfree
+#endif
+
+voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
+{
+    if (opaque) opaque = 0; /* to make compiler happy */
+    return _halloc((long)items, size);
+}
+
+void  zcfree (voidpf opaque, voidpf ptr)
+{
+    if (opaque) opaque = 0; /* to make compiler happy */
+    _hfree(ptr);
+}
+
+#endif /* MSC */
+
+
+#ifndef MY_ZCALLOC /* Any system without a special alloc function */
+
+#ifndef STDC
+extern voidp  calloc OF((uInt items, uInt size));
+extern void   free   OF((voidpf ptr));
+#endif
+
+voidpf zcalloc (opaque, items, size)
+    voidpf opaque;
+    unsigned items;
+    unsigned size;
+{
+    if (opaque) items += size - size; /* make compiler happy */
+    return (voidpf)calloc(items, size);
+}
+
+void  zcfree (opaque, ptr)
+    voidpf opaque;
+    voidpf ptr;
+{
+    free(ptr);
+    if (opaque) return; /* make compiler happy */
+}
+
+#endif /* MY_ZCALLOC */
diff --git a/common/zlib/zutil.h b/common/zlib/zutil.h
new file mode 100644
index 00000000..17eb77f2
--- /dev/null
+++ b/common/zlib/zutil.h
@@ -0,0 +1,220 @@
+/* zutil.h -- internal interface and configuration of the compression library
+ * Copyright (C) 1995-2002 Jean-loup Gailly.
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* @(#) $Id: zutil.h,v 1.1 2004/10/08 09:44:28 const_k Exp $ */
+
+#ifndef _Z_UTIL_H
+#define _Z_UTIL_H
+
+#include "zlib.h"
+
+#ifdef STDC
+#  include <stddef.h>
+#  include <string.h>
+#  include <stdlib.h>
+#endif
+#ifdef NO_ERRNO_H
+    extern int errno;
+#else
+#   include <errno.h>
+#endif
+
+#ifndef local
+#  define local static
+#endif
+/* compile with -Dlocal if your debugger can't find static symbols */
+
+typedef unsigned char  uch;
+typedef uch FAR uchf;
+typedef unsigned short ush;
+typedef ush FAR ushf;
+typedef unsigned long  ulg;
+
+extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
+/* (size given to avoid silly warnings with Visual C++) */
+
+#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
+
+#define ERR_RETURN(strm,err) \
+  return (strm->msg = (char*)ERR_MSG(err), (err))
+/* To be used only when the state is known to be valid */
+
+        /* common constants */
+
+#ifndef DEF_WBITS
+#  define DEF_WBITS MAX_WBITS
+#endif
+/* default windowBits for decompression. MAX_WBITS is for compression only */
+
+#if MAX_MEM_LEVEL >= 8
+#  define DEF_MEM_LEVEL 8
+#else
+#  define DEF_MEM_LEVEL  MAX_MEM_LEVEL
+#endif
+/* default memLevel */
+
+#define STORED_BLOCK 0
+#define STATIC_TREES 1
+#define DYN_TREES    2
+/* The three kinds of block type */
+
+#define MIN_MATCH  3
+#define MAX_MATCH  258
+/* The minimum and maximum match lengths */
+
+#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
+
+        /* target dependencies */
+
+#ifdef MSDOS
+#  define OS_CODE  0x00
+#  if defined(__TURBOC__) || defined(__BORLANDC__)
+#    if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
+       /* Allow compilation with ANSI keywords only enabled */
+       void _Cdecl farfree( void *block );
+       void *_Cdecl farmalloc( unsigned long nbytes );
+#    else
+#     include <alloc.h>
+#    endif
+#  else /* MSC or DJGPP */
+#    include <malloc.h>
+#  endif
+#endif
+
+#ifdef OS2
+#  define OS_CODE  0x06
+#endif
+
+#ifdef WIN32 /* Window 95 & Windows NT */
+#  define OS_CODE  0x0b
+#endif
+
+#if defined(VAXC) || defined(VMS)
+#  define OS_CODE  0x02
+#  define F_OPEN(name, mode) \
+     fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
+#endif
+
+#ifdef AMIGA
+#  define OS_CODE  0x01
+#endif
+
+#if defined(ATARI) || defined(atarist)
+#  define OS_CODE  0x05
+#endif
+
+#if defined(MACOS) || defined(TARGET_OS_MAC)
+#  define OS_CODE  0x07
+#  if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+#    include <unix.h> /* for fdopen */
+#  else
+#    ifndef fdopen
+#      define fdopen(fd,mode) NULL /* No fdopen() */
+#    endif
+#  endif
+#endif
+
+#ifdef __50SERIES /* Prime/PRIMOS */
+#  define OS_CODE  0x0F
+#endif
+
+#ifdef TOPS20
+#  define OS_CODE  0x0a
+#endif
+
+#if defined(_BEOS_) || defined(RISCOS)
+#  define fdopen(fd,mode) NULL /* No fdopen() */
+#endif
+
+#if (defined(_MSC_VER) && (_MSC_VER > 600))
+#  define fdopen(fd,type)  _fdopen(fd,type)
+#endif
+
+
+        /* Common defaults */
+
+#ifndef OS_CODE
+#  define OS_CODE  0x03  /* assume Unix */
+#endif
+
+#ifndef F_OPEN
+#  define F_OPEN(name, mode) fopen((name), (mode))
+#endif
+
+         /* functions */
+
+#ifdef HAVE_STRERROR
+   extern char *strerror OF((int));
+#  define zstrerror(errnum) strerror(errnum)
+#else
+#  define zstrerror(errnum) ""
+#endif
+
+#if defined(pyr)
+#  define NO_MEMCPY
+#endif
+#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
+ /* Use our own functions for small and medium model with MSC <= 5.0.
+  * You may have to use the same strategy for Borland C (untested).
+  * The __SC__ check is for Symantec.
+  */
+#  define NO_MEMCPY
+#endif
+#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
+#  define HAVE_MEMCPY
+#endif
+#ifdef HAVE_MEMCPY
+#  ifdef SMALL_MEDIUM /* MSDOS small or medium model */
+#    define zmemcpy _fmemcpy
+#    define zmemcmp _fmemcmp
+#    define zmemzero(dest, len) _fmemset(dest, 0, len)
+#  else
+#    define zmemcpy memcpy
+#    define zmemcmp memcmp
+#    define zmemzero(dest, len) memset(dest, 0, len)
+#  endif
+#else
+   extern void zmemcpy  OF((Bytef* dest, const Bytef* source, uInt len));
+   extern int  zmemcmp  OF((const Bytef* s1, const Bytef* s2, uInt len));
+   extern void zmemzero OF((Bytef* dest, uInt len));
+#endif
+
+/* Diagnostic functions */
+#ifdef DEBUG
+#  include <stdio.h>
+   extern int z_verbose;
+   extern void z_error    OF((char *m));
+#  define Assert(cond,msg) {if(!(cond)) z_error(msg);}
+#  define Trace(x) {if (z_verbose>=0) fprintf x ;}
+#  define Tracev(x) {if (z_verbose>0) fprintf x ;}
+#  define Tracevv(x) {if (z_verbose>1) fprintf x ;}
+#  define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
+#  define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
+#else
+#  define Assert(cond,msg)
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c,x)
+#  define Tracecv(c,x)
+#endif
+
+
+typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
+				       uInt len));
+voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
+void   zcfree  OF((voidpf opaque, voidpf ptr));
+
+#define ZALLOC(strm, items, size) \
+           (*((strm)->zalloc))((strm)->opaque, (items), (size))
+#define ZFREE(strm, addr)  (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
+#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
+
+#endif /* _Z_UTIL_H */