tigervnc/unix/xserver/hw/vnc/xvnc.cc

/* Copyright (c) 1993  X Consortium
   Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
   Copyright 2009 Pierre Ossman for Cendio AB

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

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 X CONSORTIUM 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 X Consortium 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 X Consortium.

*/

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <rfb/Configuration.h>
#include <rfb/Logger_stdio.h>
#include <rfb/LogWriter.h>
#include <network/TcpSocket.h>
#include "vncExtInit.h"
#include "xorg-version.h"

extern "C" {
#define class c_class
#define public c_public
#ifdef WIN32
#include <X11/Xwinsock.h>
#endif
#include <stdio.h>
#include <X11/X.h>
#define NEED_EVENTS
#include <X11/Xproto.h>
#include <X11/Xos.h>
#include "scrnintstr.h"
#include "servermd.h"
#include "fb.h"
#include "mi.h"
#include "mibstore.h"
#include "colormapst.h"
#include "gcstruct.h"
#include "input.h"
#include "mipointer.h"
#define new New
#include "micmap.h"
#undef new
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#ifndef WIN32
#include <sys/param.h>
#endif
#include <X11/XWDFile.h>
#ifdef HAS_SHM
#include <sys/ipc.h>
#include <sys/shm.h>
#endif /* HAS_SHM */
#include "dix.h"
#include "miline.h"
#include "inputstr.h"
#ifdef RANDR
#include "randrstr.h"
#endif /* RANDR */
#include <X11/keysym.h>
  extern char buildtime[];
#if XORG >= 17
#undef VENDOR_RELEASE
#undef VENDOR_STRING
#include "version-config.h"
#include "site.h"
#endif
#undef class
#undef public
}

#if XORG >= 110
#define Xalloc malloc
#define Xfree free
#endif

#define XVNCVERSION "TigerVNC 1.1.80"
#define XVNCCOPYRIGHT ("Copyright (C) 1999-2011 TigerVNC Team and many others (see README.txt)\n" \
                       "See http://www.tigervnc.org for information on TigerVNC.\n")


extern char *display;
extern int monitorResolution;

#define VFB_DEFAULT_WIDTH  1024
#define VFB_DEFAULT_HEIGHT 768
#define VFB_DEFAULT_DEPTH  24
#define VFB_DEFAULT_WHITEPIXEL 0xffffffff
#define VFB_DEFAULT_BLACKPIXEL 0
#define VFB_DEFAULT_LINEBIAS 0
#define XWD_WINDOW_NAME_LEN 60

typedef struct
{
    int width;
    int height;

    int depth;

    /* Computed when allocated */

    int paddedBytesWidth;
    int paddedWidth;

    int bitsPerPixel;

    /* Private */

    int sizeInBytes;

    void *pfbMemory;

#ifdef HAS_SHM
    int shmid;
#endif
} vfbFramebufferInfo, *vfbFramebufferInfoPtr;

typedef struct
{
    int scrnum;

    Pixel blackPixel;
    Pixel whitePixel;

    unsigned int lineBias;

    CloseScreenProcPtr closeScreen;

    vfbFramebufferInfo fb;

    Bool pixelFormatDefined;
    Bool rgbNotBgr;
    int redBits, greenBits, blueBits;
} vfbScreenInfo, *vfbScreenInfoPtr;

static int vfbNumScreens;
static vfbScreenInfo vfbScreens[MAXSCREENS];
static Bool vfbPixmapDepths[33];
typedef enum { NORMAL_MEMORY_FB, SHARED_MEMORY_FB } fbMemType;
static fbMemType fbmemtype = NORMAL_MEMORY_FB;
static int lastScreen = -1;
static Bool Render = TRUE;

static bool displaySpecified = false;
static char displayNumStr[16];

char *listenaddr = NULL;


static void
vfbInitializePixmapDepths(void)
{
    int i;
    vfbPixmapDepths[1] = TRUE; /* always need bitmaps */
    for (i = 2; i <= 32; i++)
	vfbPixmapDepths[i] = FALSE;
}

static void
vfbInitializeDefaultScreens(void)
{
    int i;

    for (i = 0; i < MAXSCREENS; i++)
    {
	vfbScreens[i].scrnum = i;
	vfbScreens[i].blackPixel = VFB_DEFAULT_BLACKPIXEL;
	vfbScreens[i].whitePixel = VFB_DEFAULT_WHITEPIXEL;
	vfbScreens[i].lineBias = VFB_DEFAULT_LINEBIAS;
	vfbScreens[i].fb.width  = VFB_DEFAULT_WIDTH;
	vfbScreens[i].fb.height = VFB_DEFAULT_HEIGHT;
	vfbScreens[i].fb.pfbMemory = NULL;
	vfbScreens[i].fb.depth  = VFB_DEFAULT_DEPTH;
	vfbScreens[i].pixelFormatDefined = FALSE;
    }
    vfbNumScreens = 1;
}

static int
vfbBitsPerPixel(int depth)
{
    if (depth == 1) return 1;
    else if (depth <= 8) return 8;
    else if (depth <= 16) return 16;
    else return 32;
}

static void vfbFreeFramebufferMemory(vfbFramebufferInfoPtr pfb);

extern "C" {

#ifdef DPMSExtension
    /* Why support DPMS? Because stupid modern desktop environments
       such as Unity 2D on Ubuntu 11.10 crashes if DPMS is not
       available. (DPMSSet is called by dpms.c, but the return value
       is ignored.) */
int DPMSSet(ClientPtr client, int level)
{
    return Success;
}

Bool DPMSSupported()
{
    /* Causes DPMSCapable to return false, meaning no devices are DPMS
       capable */
    return FALSE;
}
#endif

void ddxGiveUp()
{
    int i;

    /* clean up the framebuffers */
    for (i = 0; i < vfbNumScreens; i++)
        vfbFreeFramebufferMemory(&vfbScreens[i].fb);
}

void
AbortDDX()
{
    ddxGiveUp();
}

#ifdef __DARWIN__
void
DarwinHandleGUI(int argc, char *argv[])
{
}

void GlxExtensionInit();
void GlxWrapInitVisuals(void *procPtr);

void
DarwinGlxExtensionInit()
{
    GlxExtensionInit();
}

void
DarwinGlxWrapInitVisuals(
    void *procPtr)
{
    GlxWrapInitVisuals(procPtr);
}
#endif

void
OsVendorInit()
{
}

void
OsVendorFatalError()
{
}

void ddxBeforeReset(void)
{
    return;
}

void 
ddxUseMsg()
{
    ErrorF("\nXvnc %s - built %s\n%s", XVNCVERSION, buildtime, XVNCCOPYRIGHT);
    ErrorF("Underlying X server release %d, %s\n\n", VENDOR_RELEASE,
           VENDOR_STRING);
    ErrorF("-screen scrn WxHxD     set screen's width, height, depth\n");
    ErrorF("-pixdepths list-of-int support given pixmap depths\n");
#ifdef RENDER
    ErrorF("+/-render		   turn on/off RENDER extension support"
	   "(default on)\n");
#endif
    ErrorF("-linebias n            adjust thin line pixelization\n");
    ErrorF("-blackpixel n          pixel value for black\n");
    ErrorF("-whitepixel n          pixel value for white\n");

#ifdef HAS_SHM
    ErrorF("-shmem                 put framebuffers in shared memory\n");
#endif

    ErrorF("-geometry WxH          set screen 0's width, height\n");
    ErrorF("-depth D               set screen 0's depth\n");
    ErrorF("-pixelformat fmt       set pixel format (rgbNNN or bgrNNN)\n");
    ErrorF("-inetd                 has been launched from inetd\n");
    ErrorF("-interface IP_address  listen on specified interface\n");
    ErrorF("-noclipboard           disable clipboard settings modification via vncconfig utility\n");
    ErrorF("\nVNC parameters:\n");

    fprintf(stderr,"\n"
            "Parameters can be turned on with -<param> or off with -<param>=0\n"
            "Parameters which take a value can be specified as "
            "-<param> <value>\n"
            "Other valid forms are <param>=<value> -<param>=<value> "
            "--<param>=<value>\n"
            "Parameter names are case-insensitive.  The parameters are:\n\n");
    rfb::Configuration::listParams(79, 14);
  }
}

/* ddxInitGlobals - called by |InitGlobals| from os/util.c */
void ddxInitGlobals(void)
{
}

static 
bool displayNumFree(int num)
{
    try {
	network::TcpListener l(NULL, 6000+num);
    } catch (rdr::Exception& e) {
	return false;
    }
    char file[256];
    sprintf(file, "/tmp/.X%d-lock", num);
    if (access(file, F_OK) == 0) return false;
    sprintf(file, "/tmp/.X11-unix/X%d", num);
    if (access(file, F_OK) == 0) return false;
    sprintf(file, "/usr/spool/sockets/X11/%d", num);
    if (access(file, F_OK) == 0) return false;
    return true;
}

int 
ddxProcessArgument(int argc, char *argv[], int i)
{
    static Bool firstTime = TRUE;

    if (firstTime)
    {
	vfbInitializeDefaultScreens();
	vfbInitializePixmapDepths();
	firstTime = FALSE;
	rfb::initStdIOLoggers();
	rfb::LogWriter::setLogParams("*:stderr:30");
	rfb::Configuration::enableServerParams();
    }

    if (argv[i][0] ==  ':')
	displaySpecified = true;

    if (strcmp (argv[i], "-screen") == 0)	/* -screen n WxHxD */
    {
	int screenNum;
	if (i + 2 >= argc) UseMsg();
	screenNum = atoi(argv[i+1]);
	if (screenNum < 0 || screenNum >= MAXSCREENS)
	{
	    ErrorF("Invalid screen number %d\n", screenNum);
	    UseMsg();
	}
	if (3 != sscanf(argv[i+2], "%dx%dx%d",
			&vfbScreens[screenNum].fb.width,
			&vfbScreens[screenNum].fb.height,
			&vfbScreens[screenNum].fb.depth))
	{
	    ErrorF("Invalid screen configuration %s\n", argv[i+2]);
	    UseMsg();
	}

	if (screenNum >= vfbNumScreens)
	    vfbNumScreens = screenNum + 1;
	lastScreen = screenNum;
	return 3;
    }

    if (strcmp (argv[i], "-pixdepths") == 0)	/* -pixdepths list-of-depth */
    {
	int depth, ret = 1;

	if (++i >= argc) UseMsg();
	while ((i < argc) && (depth = atoi(argv[i++])) != 0)
	{
	    if (depth < 0 || depth > 32)
	    {
		ErrorF("Invalid pixmap depth %d\n", depth);
		UseMsg();
	    }
	    vfbPixmapDepths[depth] = TRUE;
	    ret++;
	}
	return ret;
    }
    
    if (strcmp (argv[i], "+render") == 0)	/* +render */
    {
	Render = TRUE;
	return 1;
    }
  
    if (strcmp (argv[i], "-render") == 0)	/* -render */
    {
	Render = FALSE;
	return 1;
    }

    if (strcmp (argv[i], "-blackpixel") == 0)	/* -blackpixel n */
    {
	Pixel pix;
	if (++i >= argc) UseMsg();
	pix = atoi(argv[i]);
	if (-1 == lastScreen)
	{
	    int i;
	    for (i = 0; i < MAXSCREENS; i++)
	    {
		vfbScreens[i].blackPixel = pix;
	    }
	}
	else
	{
	    vfbScreens[lastScreen].blackPixel = pix;
	}
	return 2;
    }

    if (strcmp (argv[i], "-whitepixel") == 0)	/* -whitepixel n */
    {
	Pixel pix;
	if (++i >= argc) UseMsg();
	pix = atoi(argv[i]);
	if (-1 == lastScreen)
	{
	    int i;
	    for (i = 0; i < MAXSCREENS; i++)
	    {
		vfbScreens[i].whitePixel = pix;
	    }
	}
	else
	{
	    vfbScreens[lastScreen].whitePixel = pix;
	}
	return 2;
    }
    
    if (strcmp (argv[i], "-linebias") == 0)	/* -linebias n */
    {
	unsigned int linebias;
	if (++i >= argc) UseMsg();
	linebias = atoi(argv[i]);
	if (-1 == lastScreen)
	{
	    int i;
	    for (i = 0; i < MAXSCREENS; i++)
	    {
		vfbScreens[i].lineBias = linebias;
	    }
	}
	else
	{
	    vfbScreens[lastScreen].lineBias = linebias;
	}
	return 2;
    }

#ifdef HAS_SHM
    if (strcmp (argv[i], "-shmem") == 0)	/* -shmem */
    {
	fbmemtype = SHARED_MEMORY_FB;
	return 1;
    }
#endif
    
    if (strcmp(argv[i], "-geometry") == 0)
    {
	if (++i >= argc) UseMsg();
	if (sscanf(argv[i],"%dx%d",&vfbScreens[0].fb.width,
		   &vfbScreens[0].fb.height) != 2) {
	    ErrorF("Invalid geometry %s\n", argv[i]);
	    UseMsg();
	}
	return 2;
    }
    
    if (strcmp(argv[i], "-depth") == 0)
    {
	if (++i >= argc) UseMsg();
	vfbScreens[0].fb.depth = atoi(argv[i]);
	return 2;
    }

    if (strcmp(argv[i], "-pixelformat") == 0)
    {
	char rgbbgr[4];
	int bits1, bits2, bits3;
	if (++i >= argc) UseMsg();
	if (sscanf(argv[i], "%3s%1d%1d%1d", rgbbgr,&bits1,&bits2,&bits3) < 4) {
	    ErrorF("Invalid pixel format %s\n", argv[i]);
	    UseMsg();
	}

#define SET_PIXEL_FORMAT(vfbScreen)                     \
    (vfbScreen).pixelFormatDefined = TRUE;              \
    (vfbScreen).fb.depth = bits1 + bits2 + bits3;          \
    (vfbScreen).greenBits = bits2;                      \
    if (strcasecmp(rgbbgr, "bgr") == 0) {               \
        (vfbScreen).rgbNotBgr = FALSE;                  \
        (vfbScreen).redBits = bits3;                    \
        (vfbScreen).blueBits = bits1;                   \
    } else if (strcasecmp(rgbbgr, "rgb") == 0) {        \
        (vfbScreen).rgbNotBgr = TRUE;                   \
        (vfbScreen).redBits = bits1;                    \
        (vfbScreen).blueBits = bits3;                   \
    } else {                                            \
        ErrorF("Invalid pixel format %s\n", argv[i]);   \
        UseMsg();                                       \
    }

	if (-1 == lastScreen)
	{
	    int i;
	    for (i = 0; i < MAXSCREENS; i++)
	    {
		SET_PIXEL_FORMAT(vfbScreens[i]);
	    }
	}
	else
	{
	    SET_PIXEL_FORMAT(vfbScreens[lastScreen]);
	}

	return 2;
    }

    if (strcmp(argv[i], "-inetd") == 0)
    {
	dup2(0,3);
	vncInetdSock = 3;
	close(2);
	
	if (!displaySpecified) {
	    int port = network::TcpSocket::getSockPort(vncInetdSock);
	    int displayNum = port - 5900;
	    if (displayNum < 0 || displayNum > 99 || !displayNumFree(displayNum)) {
		for (displayNum = 1; displayNum < 100; displayNum++)
		    if (displayNumFree(displayNum)) break;
		
		if (displayNum == 100)
		    FatalError("Xvnc error: no free display number for -inetd");
	    }
	    
	    display = displayNumStr;
	    sprintf(displayNumStr, "%d", displayNum);
	}
	
	return 1;
    }

    if (strcmp(argv[i], "-interface") == 0 ||
	strcmp(argv[i], "-i") == 0) {
	if (++i >= argc) {
	    UseMsg();
	    return 2;
	}

	if (listenaddr != NULL) /* Only first -interface is valid */
		return 2;

	listenaddr = strdup(argv[i]);
	if (listenaddr == NULL)
	    FatalError("Not enough memory");

	return 2;
    }

    if (strcmp(argv[i], "-noclipboard") == 0) {
	noclipboard = true;
	return 1;
    }
    
    if (rfb::Configuration::setParam(argv[i]))
	return 1;
    
    if (argv[i][0] == '-' && i+1 < argc) {
	if (rfb::Configuration::setParam(&argv[i][1], argv[i+1]))
	    return 2;
    }
    
    return 0;
}

#ifdef DDXTIME /* from ServerOSDefines */
CARD32
GetTimeInMillis()
{
    struct timeval  tp;

    X_GETTIMEOFDAY(&tp);
    return(tp.tv_sec * 1000) + (tp.tv_usec / 1000);
}
#endif

static ColormapPtr InstalledMaps[MAXSCREENS];

static int 
vfbListInstalledColormaps(ScreenPtr pScreen, Colormap *pmaps)
{
    /* By the time we are processing requests, we can guarantee that there
     * is always a colormap installed */
    *pmaps = InstalledMaps[pScreen->myNum]->mid;
    return (1);
}


static void 
vfbInstallColormap(ColormapPtr pmap)
{
    int index = pmap->pScreen->myNum;
    ColormapPtr oldpmap = InstalledMaps[index];

    if (pmap != oldpmap)
    {
	int entries;
	VisualPtr pVisual;
	Pixel *     ppix;
	xrgb *      prgb;
	xColorItem *defs;
	int i;

	if(oldpmap != (ColormapPtr)None)
	    WalkTree(pmap->pScreen, TellLostMap, (char *)&oldpmap->mid);
	/* Install pmap */
	InstalledMaps[index] = pmap;
	WalkTree(pmap->pScreen, TellGainedMap, (char *)&pmap->mid);

	entries = pmap->pVisual->ColormapEntries;
	pVisual = pmap->pVisual;

	ppix = (Pixel *)xalloc(entries * sizeof(Pixel));
	prgb = (xrgb *)xalloc(entries * sizeof(xrgb));
	defs = (xColorItem *)xalloc(entries * sizeof(xColorItem));

	for (i = 0; i < entries; i++)  ppix[i] = i;
	/* XXX truecolor */
#if XORG < 19
	QueryColors(pmap, entries, ppix, prgb);
#else
	QueryColors(pmap, entries, ppix, prgb, serverClient);
#endif

	for (i = 0; i < entries; i++) { /* convert xrgbs to xColorItems */
	    defs[i].pixel = ppix[i] & 0xff; /* change pixel to index */
	    defs[i].red = prgb[i].red;
	    defs[i].green = prgb[i].green;
	    defs[i].blue = prgb[i].blue;
	    defs[i].flags =  DoRed|DoGreen|DoBlue;
	}
	(*pmap->pScreen->StoreColors)(pmap, entries, defs);
	
	xfree(ppix);
	xfree(prgb);
	xfree(defs);
    }
}

static void
vfbUninstallColormap(ColormapPtr pmap)
{
    ColormapPtr curpmap = InstalledMaps[pmap->pScreen->myNum];

    if(pmap == curpmap)
    {
	if (pmap->mid != pmap->pScreen->defColormap)
	{
	    curpmap = (ColormapPtr) LookupIDByType(pmap->pScreen->defColormap,
						   RT_COLORMAP);
	    (*pmap->pScreen->InstallColormap)(curpmap);
	}
    }
}

static Bool
vfbSaveScreen(ScreenPtr pScreen, int on)
{
    return TRUE;
}

#ifdef HAS_SHM
static void
vfbAllocateSharedMemoryFramebuffer(vfbFramebufferInfoPtr pfb)
{
    /* create the shared memory segment */

    pfb->shmid = shmget(IPC_PRIVATE, pfb->sizeInBytes, IPC_CREAT|0777);
    if (pfb->shmid < 0) {
        perror("shmget");
        ErrorF("shmget %d bytes failed, errno %d", pfb->sizeInBytes, errno);
        return;
    }

    /* try to attach it */

    pfb->pfbMemory = shmat(pfb->shmid, 0, 0);
    if (-1 == (long)pfb->pfbMemory) {
        perror("shmat");
        ErrorF("shmat failed, errno %d", errno);
        pfb->pfbMemory = NULL; 
        return;
    }
}
#endif /* HAS_SHM */


static void *
vfbAllocateFramebufferMemory(vfbFramebufferInfoPtr pfb)
{
    if (pfb->pfbMemory != NULL)
        return pfb->pfbMemory; /* already done */

    /* Compute memory layout */
    pfb->paddedBytesWidth = PixmapBytePad(pfb->width, pfb->depth);
    pfb->bitsPerPixel = vfbBitsPerPixel(pfb->depth);
    pfb->paddedWidth = pfb->paddedBytesWidth * 8 / pfb->bitsPerPixel;
    pfb->sizeInBytes = pfb->paddedBytesWidth * pfb->height;

    /* And allocate buffer */
    switch (fbmemtype) {
#ifdef HAS_SHM
    case SHARED_MEMORY_FB:
        vfbAllocateSharedMemoryFramebuffer(pfb);
        break;
#else
    case SHARED_MEMORY_FB:
        break;
#endif
    case NORMAL_MEMORY_FB:
        pfb->pfbMemory = Xalloc(pfb->sizeInBytes);
        break;
    }

    /* This will be NULL if any of the above failed */
    return pfb->pfbMemory;
}

static void
vfbFreeFramebufferMemory(vfbFramebufferInfoPtr pfb)
{
    if ((pfb == NULL) || (pfb->pfbMemory == NULL))
        return;

    switch (fbmemtype) {
#ifdef HAS_SHM
    case SHARED_MEMORY_FB:
        if (-1 == shmdt(pfb->pfbMemory)) {
            perror("shmdt");
            ErrorF("shmdt failed, errno %d", errno);
        }
        break;
#else /* HAS_SHM */
    case SHARED_MEMORY_FB:
        break;
#endif /* HAS_SHM */
    case NORMAL_MEMORY_FB:
        Xfree(pfb->pfbMemory);
        break;
    }

    pfb->pfbMemory = NULL;
}

static Bool
vfbCursorOffScreen (ScreenPtr *ppScreen, int *x, int *y)
{
    return FALSE;
}

static void
vfbCrossScreen (ScreenPtr pScreen, Bool entering)
{
}

static Bool vfbRealizeCursor(
#if XORG >= 16
			     DeviceIntPtr pDev,
#endif
			     ScreenPtr pScreen, CursorPtr pCursor) {
    return TRUE;
}

static Bool vfbUnrealizeCursor(
#if XORG >= 16
			       DeviceIntPtr pDev,
#endif
			       ScreenPtr pScreen, CursorPtr pCursor) {
    return TRUE;
}

static void vfbSetCursor(
#if XORG >= 16
			 DeviceIntPtr pDev,
#endif
			 ScreenPtr pScreen, CursorPtr pCursor, int x, int y) 
{
}

static void vfbMoveCursor(
#if XORG >= 16
			  DeviceIntPtr pDev,
#endif
			  ScreenPtr pScreen, int x, int y) 
{
}

#if XORG >= 16
static Bool
vfbDeviceCursorInitialize(DeviceIntPtr pDev, ScreenPtr pScreen)
{   
    return TRUE;
}

static void
vfbDeviceCursorCleanup(DeviceIntPtr pDev, ScreenPtr pScreen)
{ 
}
#endif

static miPointerSpriteFuncRec vfbPointerSpriteFuncs = {
    vfbRealizeCursor,
    vfbUnrealizeCursor,
    vfbSetCursor,
    vfbMoveCursor
#if XORG >= 16
    , vfbDeviceCursorInitialize,
    vfbDeviceCursorCleanup
#endif
};

static miPointerScreenFuncRec vfbPointerCursorFuncs = {
    vfbCursorOffScreen,
    vfbCrossScreen,
    miPointerWarpCursor
};

#ifdef RANDR

static Bool vncRandRGetInfo (ScreenPtr pScreen, Rotation *rotations)
{
  Bool ret, gotCurrent = FALSE;
  int i;

  const int widths[] =  { 1920, 1920, 1600, 1680, 1400, 1360, 1280, 1280, 1280, 1280, 1024, 800, 640 };
  const int heights[] = { 1200, 1080, 1200, 1050, 1050,  768, 1024,  960,  800,  720,  768, 600, 480 };

  for (i = 0;i < sizeof(widths)/sizeof(*widths);i++) {
    RRScreenSizePtr pSize;

    pSize = RRRegisterSize(pScreen, widths[i], heights[i],
                           pScreen->mmWidth, pScreen->mmHeight);
    if (!pSize)
      return FALSE;

    ret = RRRegisterRate(pScreen, pSize, 60);
    if (!ret)
      return FALSE;

    if ((widths[i] == pScreen->width) && (heights[i] == pScreen->height)) {
      RRSetCurrentConfig(pScreen, RR_Rotate_0, 60, pSize);
      gotCurrent = TRUE;
    }
  }

  if (!gotCurrent) {
    RRScreenSizePtr pSize;

    pSize = RRRegisterSize(pScreen, pScreen->width, pScreen->height,
                           pScreen->mmWidth, pScreen->mmHeight);
    if (!pSize)
      return FALSE;

    RRRegisterRate(pScreen, pSize, 60);

    RRSetCurrentConfig(pScreen, RR_Rotate_0, 60, pSize);
  }

  *rotations = RR_Rotate_0;

  return TRUE;
}

/* from hw/xfree86/common/xf86Helper.c */

#include "mivalidate.h"
static void
xf86SetRootClip (ScreenPtr pScreen, Bool enable)
{
#if XORG < 19
    WindowPtr	pWin = WindowTable[pScreen->myNum];
#else
    WindowPtr	pWin = pScreen->root;
#endif
    WindowPtr	pChild;
    Bool	WasViewable = (Bool)(pWin->viewable);
    Bool	anyMarked = FALSE;
#if XORG < 110
    RegionPtr	pOldClip = NULL, bsExposed;
#ifdef DO_SAVE_UNDERS
    Bool	dosave = FALSE;
#endif
#endif
    WindowPtr   pLayerWin;
    BoxRec	box;

    if (WasViewable)
    {
	for (pChild = pWin->firstChild; pChild; pChild = pChild->nextSib)
	{
	    (void) (*pScreen->MarkOverlappedWindows)(pChild,
						     pChild,
						     &pLayerWin);
	}
	(*pScreen->MarkWindow) (pWin);
	anyMarked = TRUE;
	if (pWin->valdata)
	{
	    if (HasBorder (pWin))
	    {
		RegionPtr	borderVisible;

		borderVisible = REGION_CREATE(pScreen, NullBox, 1);
		REGION_SUBTRACT(pScreen, borderVisible,
				&pWin->borderClip, &pWin->winSize);
		pWin->valdata->before.borderVisible = borderVisible;
	    }
	    pWin->valdata->before.resized = TRUE;
	}
    }
    
    /*
     * Use REGION_BREAK to avoid optimizations in ValidateTree
     * that assume the root borderClip can't change well, normally
     * it doesn't...)
     */
    if (enable)
    {
	box.x1 = 0;
	box.y1 = 0;
	box.x2 = pScreen->width;
	box.y2 = pScreen->height;
	REGION_INIT (pScreen, &pWin->winSize, &box, 1);
	REGION_INIT (pScreen, &pWin->borderSize, &box, 1);
	if (WasViewable)
	    REGION_RESET(pScreen, &pWin->borderClip, &box);
	pWin->drawable.width = pScreen->width;
	pWin->drawable.height = pScreen->height;
        REGION_BREAK (pWin->drawable.pScreen, &pWin->clipList);
    }
    else
    {
	REGION_EMPTY(pScreen, &pWin->borderClip);
	REGION_BREAK (pWin->drawable.pScreen, &pWin->clipList);
    }
    
    ResizeChildrenWinSize (pWin, 0, 0, 0, 0);
    
    if (WasViewable)
    {
#if XORG < 110
	if (pWin->backStorage)
	{
	    pOldClip = REGION_CREATE(pScreen, NullBox, 1);
	    REGION_COPY(pScreen, pOldClip, &pWin->clipList);
	}
#endif

	if (pWin->firstChild)
	{
	    anyMarked |= (*pScreen->MarkOverlappedWindows)(pWin->firstChild,
							   pWin->firstChild,
							   (WindowPtr *)NULL);
	}
	else
	{
	    (*pScreen->MarkWindow) (pWin);
	    anyMarked = TRUE;
	}

#if XORG < 110 && defined(DO_SAVE_UNDERS)
	if (DO_SAVE_UNDERS(pWin))
	{
	    dosave = (*pScreen->ChangeSaveUnder)(pLayerWin, pLayerWin);
	}
#endif /* DO_SAVE_UNDERS */

	if (anyMarked)
	    (*pScreen->ValidateTree)(pWin, NullWindow, VTOther);
    }

#if XORG < 110
    if (pWin->backStorage &&
	((pWin->backingStore == Always) || WasViewable))
    {
	if (!WasViewable)
	    pOldClip = &pWin->clipList; /* a convenient empty region */
	bsExposed = (*pScreen->TranslateBackingStore)
			     (pWin, 0, 0, pOldClip,
			      pWin->drawable.x, pWin->drawable.y);
	if (WasViewable)
	    REGION_DESTROY(pScreen, pOldClip);
	if (bsExposed)
	{
	    RegionPtr	valExposed = NullRegion;
    
	    if (pWin->valdata)
		valExposed = &pWin->valdata->after.exposed;
	    (*pScreen->WindowExposures) (pWin, valExposed, bsExposed);
	    if (valExposed)
		REGION_EMPTY(pScreen, valExposed);
	    REGION_DESTROY(pScreen, bsExposed);
	}
    }
#endif
    if (WasViewable)
    {
	if (anyMarked)
	    (*pScreen->HandleExposures)(pWin);

#if XORG < 110 && defined(DO_SAVE_UNDERS)
	if (dosave)
	    (*pScreen->PostChangeSaveUnder)(pLayerWin, pLayerWin);
#endif /* DO_SAVE_UNDERS */
	if (anyMarked && pScreen->PostValidateTree)
	    (*pScreen->PostValidateTree)(pWin, NullWindow, VTOther);
    }
    if (pWin->realized)
	WindowsRestructured ();
    FlushAllOutput ();
}

static Bool vncRandRSetConfig (ScreenPtr pScreen, Rotation rotation,
		    int	rate, RRScreenSizePtr pSize)
{
    vfbScreenInfoPtr pvfb = &vfbScreens[pScreen->myNum];
    vfbFramebufferInfo fb;
    PixmapPtr rootPixmap = pScreen->GetScreenPixmap(pScreen);
    void *pbits;
    Bool ret;
    int oldwidth, oldheight, oldmmWidth, oldmmHeight;
    int dpix, dpiy;

    /* Prevent updates while we fiddle */
    xf86SetRootClip(pScreen, FALSE);

    /* Store current state in case we fail */
    oldwidth = pScreen->width;
    oldheight = pScreen->height;
    oldmmWidth = pScreen->mmWidth;
    oldmmHeight = pScreen->mmHeight;

    /* Compute the current DPI (for use later) */
    dpix = (pScreen->width * 254 + pScreen->mmWidth * 5) / (pScreen->mmWidth * 10);
    dpiy = (pScreen->height * 254 + pScreen->mmHeight * 5) / (pScreen->mmHeight * 10);

    /* Then set the new dimensions */
    pScreen->width = pSize->width;
    pScreen->height = pSize->height;

    /* Try to keep the same DPI as we do not have a physical screen */
    pScreen->mmWidth = (pScreen->width * 254 + dpix * 5) / (dpix * 10);
    pScreen->mmHeight = (pScreen->height * 254 + dpiy * 5) / (dpiy * 10);

    /* Allocate a new framebuffer */
    memset(&fb, 0, sizeof(vfbFramebufferInfo));

    fb.width = pScreen->width;
    fb.height = pScreen->height;
    fb.depth = pvfb->fb.depth;

    pbits = vfbAllocateFramebufferMemory(&fb);
    if (!pbits) {
        /* Allocation failed. Restore old state */
        pScreen->width = oldwidth;
        pScreen->height = oldheight;
        pScreen->mmWidth = oldmmWidth;
        pScreen->mmHeight = oldmmHeight;

        xf86SetRootClip(pScreen, TRUE);

        return FALSE;
    }

    /* Update root pixmap with the new dimensions and buffer */
    ret = pScreen->ModifyPixmapHeader(rootPixmap, fb.width, fb.height,
                                      -1, -1, fb.paddedBytesWidth, pbits);
    if (!ret) {
        /* Update failed. Free the new framebuffer and restore old state */
        vfbFreeFramebufferMemory(&fb);

        pScreen->width = oldwidth;
        pScreen->height = oldheight;
        pScreen->mmWidth = oldmmWidth;
        pScreen->mmHeight = oldmmHeight;

        xf86SetRootClip(pScreen, TRUE);

        return FALSE;
    }

    /* Free the old framebuffer and keep the info about the new one */
    vfbFreeFramebufferMemory(&pvfb->fb);
    memcpy(&pvfb->fb, &fb, sizeof(vfbFramebufferInfo));

    /* Let VNC get the new framebuffer (actual update is in vncHooks.cc) */
    vncFbptr[pScreen->myNum] = pbits;
    vncFbstride[pScreen->myNum] = fb.paddedWidth;

    /* Restore ability to update screen, now with new dimensions */
    xf86SetRootClip(pScreen, TRUE);

    return TRUE;
}

#endif

static Bool
vfbCloseScreen(int index, ScreenPtr pScreen)
{
    vfbScreenInfoPtr pvfb = &vfbScreens[index];
    int i;
 
    pScreen->CloseScreen = pvfb->closeScreen;

    /*
     * XXX probably lots of stuff to clean.  For now,
     * clear InstalledMaps[] so that server reset works correctly.
     */
    for (i = 0; i < MAXSCREENS; i++)
	InstalledMaps[i] = NULL;

    return pScreen->CloseScreen(index, pScreen);
}

static Bool
vfbScreenInit(int index, ScreenPtr pScreen, int argc, char **argv)
{
    vfbScreenInfoPtr pvfb = &vfbScreens[index];
    int dpi;
    int ret;
    void *pbits;

    /* 96 is the default used by most other systems */
    dpi = 96;
    if (monitorResolution)
        dpi = monitorResolution;

    pbits = vfbAllocateFramebufferMemory(&pvfb->fb);
    if (!pbits) return FALSE;
    vncFbptr[index] = pbits;
    vncFbstride[index] = pvfb->fb.paddedWidth;

    miSetPixmapDepths();

    switch (pvfb->fb.depth) {
    case 8:
	miSetVisualTypesAndMasks (8,
				  ((1 << StaticGray) |
				  (1 << GrayScale) |
				  (1 << StaticColor) |
				  (1 << PseudoColor) |
				  (1 << TrueColor) |
				  (1 << DirectColor)),
				  8, PseudoColor, 0, 0, 0);
	break;
    case 16:
	miSetVisualTypesAndMasks (16,
				  ((1 << TrueColor) |
				  (1 << DirectColor)),
				  8, TrueColor, 0xf800, 0x07e0, 0x001f);
	break;
    case 24:
	miSetVisualTypesAndMasks (24,
				  ((1 << TrueColor) |
				  (1 << DirectColor)),
				  8, TrueColor, 0xff0000, 0x00ff00, 0x0000ff);
	break;
    case 32:
	miSetVisualTypesAndMasks (32,
				  ((1 << TrueColor) |
				  (1 << DirectColor)),
				  8, TrueColor, 0xff000000, 0x00ff0000, 0x0000ff00);
	break;
    default:
	return FALSE;
    }

    ret = fbScreenInit(pScreen, pbits, pvfb->fb.width, pvfb->fb.height,
		       dpi, dpi, pvfb->fb.paddedWidth, pvfb->fb.bitsPerPixel);
  
#ifdef RENDER
    if (ret && Render) 
	ret = fbPictureInit (pScreen, 0, 0);
#endif

    if (!ret) return FALSE;

#if XORG < 110
    miInitializeBackingStore(pScreen);
#endif

    /*
     * Circumvent the backing store that was just initialised.  This amounts
     * to a truely bizarre way of initialising SaveDoomedAreas and friends.
     */

    pScreen->InstallColormap = vfbInstallColormap;
    pScreen->UninstallColormap = vfbUninstallColormap;
    pScreen->ListInstalledColormaps = vfbListInstalledColormaps;

    pScreen->SaveScreen = vfbSaveScreen;
    
    miPointerInitialize(pScreen, &vfbPointerSpriteFuncs, &vfbPointerCursorFuncs,
			FALSE);
    
    pScreen->blackPixel = pvfb->blackPixel;
    pScreen->whitePixel = pvfb->whitePixel;

    if (!pvfb->pixelFormatDefined) {
	switch (pvfb->fb.depth) {
	case 16:
	    pvfb->pixelFormatDefined = TRUE;
	    pvfb->rgbNotBgr = TRUE;
	    pvfb->blueBits = pvfb->redBits = 5;
	    pvfb->greenBits = 6;
	    break;
	case 24:
	case 32:
	    pvfb->pixelFormatDefined = TRUE;
	    pvfb->rgbNotBgr = TRUE;
	    pvfb->blueBits = pvfb->redBits = pvfb->greenBits = 8;
	    break;
	}
    }

    if (pvfb->pixelFormatDefined) {
	VisualPtr vis = pScreen->visuals;
	for (int i = 0; i < pScreen->numVisuals; i++) {
	    if (pvfb->rgbNotBgr) {
		vis->offsetBlue = 0;
		vis->blueMask = (1 << pvfb->blueBits) - 1;
		vis->offsetGreen = pvfb->blueBits;
		vis->greenMask = ((1 << pvfb->greenBits) - 1) << vis->offsetGreen;
		vis->offsetRed = vis->offsetGreen + pvfb->greenBits;
		vis->redMask = ((1 << pvfb->redBits) - 1) << vis->offsetRed;
	    } else {
		vis->offsetRed = 0;
		vis->redMask = (1 << pvfb->redBits) - 1;
		vis->offsetGreen = pvfb->redBits;
		vis->greenMask = ((1 << pvfb->greenBits) - 1) << vis->offsetGreen;
		vis->offsetBlue = vis->offsetGreen + pvfb->greenBits;
		vis->blueMask = ((1 << pvfb->blueBits) - 1) << vis->offsetBlue;
	    }
	    vis++;
	}
    }
    
    ret = fbCreateDefColormap(pScreen);
    if (!ret) return FALSE;

    miSetZeroLineBias(pScreen, pvfb->lineBias);

    pvfb->closeScreen = pScreen->CloseScreen;
    pScreen->CloseScreen = vfbCloseScreen;

#ifdef RANDR
    rrScrPrivPtr rp;

    ret = RRScreenInit(pScreen);
    if (!ret) return FALSE;

    rp = rrGetScrPriv(pScreen);
    rp->rrGetInfo = vncRandRGetInfo;
    rp->rrSetConfig = vncRandRSetConfig;
#endif


  return TRUE;

} /* end vfbScreenInit */


static void vfbClientStateChange(CallbackListPtr*, pointer, pointer) {
  dispatchException &= ~DE_RESET;
}

void
InitOutput(ScreenInfo *screenInfo, int argc, char **argv)
{
  ErrorF("\nXvnc %s - built %s\n%s", XVNCVERSION, buildtime, XVNCCOPYRIGHT);
  ErrorF("Underlying X server release %d, %s\n\n", VENDOR_RELEASE,
         VENDOR_STRING);
    int i;
    int NumFormats = 0;

    /* initialize pixmap formats */

    /* must have a pixmap depth to match every screen depth */
    for (i = 0; i < vfbNumScreens; i++)
    {
	vfbPixmapDepths[vfbScreens[i].fb.depth] = TRUE;
    }

    /* RENDER needs a good set of pixmaps. */
    if (Render) {
	vfbPixmapDepths[1] = TRUE;
	vfbPixmapDepths[4] = TRUE;
	vfbPixmapDepths[8] = TRUE;
/*	vfbPixmapDepths[15] = TRUE; */
	vfbPixmapDepths[16] = TRUE;
	vfbPixmapDepths[24] = TRUE;
	vfbPixmapDepths[32] = TRUE;
    }

    for (i = 1; i <= 32; i++)
    {
	if (vfbPixmapDepths[i])
	{
	    if (NumFormats >= MAXFORMATS)
		FatalError ("MAXFORMATS is too small for this server\n");
	    screenInfo->formats[NumFormats].depth = i;
	    screenInfo->formats[NumFormats].bitsPerPixel = vfbBitsPerPixel(i);
	    screenInfo->formats[NumFormats].scanlinePad = BITMAP_SCANLINE_PAD;
	    NumFormats++;
	}
    }

    screenInfo->imageByteOrder = IMAGE_BYTE_ORDER;
    screenInfo->bitmapScanlineUnit = BITMAP_SCANLINE_UNIT;
    screenInfo->bitmapScanlinePad = BITMAP_SCANLINE_PAD;
    screenInfo->bitmapBitOrder = BITMAP_BIT_ORDER;
    screenInfo->numPixmapFormats = NumFormats;

    /* initialize screens */

    for (i = 0; i < vfbNumScreens; i++)
    {
	if (-1 == AddScreen(vfbScreenInit, argc, argv))
	{
	    FatalError("Couldn't add screen %d", i);
	}
    }

    if (!AddCallback(&ClientStateCallback, vfbClientStateChange, 0)) {
	FatalError("AddCallback failed\n");
    }
} /* end InitOutput */

/* this is just to get the server to link on AIX */
#ifdef AIXV3
int SelectWaitTime = 10000; /* usec */
#endif

void DDXRingBell(int percent, int pitch, int duration)
{
  if (percent > 0)
    vncBell();
}

Bool LegalModifier(unsigned int key, DeviceIntPtr pDev)
{
  return TRUE;
}

void ProcessInputEvents()
{
  mieqProcessInputEvents();
#if XORG == 15
  miPointerUpdate();
#endif
}

// InitInput is called after InitExtensions, so we're guaranteed that
// vncExtensionInit() has already been called.

void InitInput(int argc, char *argv[])
{
  mieqInit ();
}

#if XORG > 17
void CloseInput(void)
{
}
#endif