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diff --git a/common/rfb/TransImageGetter.h b/common/rfb/TransImageGetter.h
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+/* 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