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Informix Table extraction queries have been optimized

    (vfbScreen).pixelFormatDefined = TRUE;              \
    (vfbScreen).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 (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 Bool vfbMultiDepthCreateGC(GCPtr   pGC)
{
  switch (vfbBitsPerPixel(pGC->depth))
  {
  case 1:  return mfbCreateGC (pGC);
  case 8:  return cfbCreateGC (pGC);
  case 16: return cfb16CreateGC (pGC);
  case 32: return cfb32CreateGC (pGC);
  default: return FALSE;
  }
}

static void vfbMultiDepthGetSpans(
                                  DrawablePtr		pDrawable,	/* drawable from which to get bits */
                                  int			wMax,		/* largest value of all *pwidths */
                                  register DDXPointPtr ppt,		/* points to start copying from */
                                  int			*pwidth,	/* list of number of bits to copy */
                                  int			nspans,		/* number of scanlines to copy */
                                  char		*pdstStart)	/* where to put the bits */
{
  switch (pDrawable->bitsPerPixel) {
  case 1:
    mfbGetSpans(pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
    break;
  case 8:
    cfbGetSpans(pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
    break;
  case 16:
    cfb16GetSpans(pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
    break;
  case 32:
    cfb32GetSpans(pDrawable, wMax, ppt, pwidth, nspans, pdstStart);
    break;
  }
  return;
}

static void
vfbMultiDepthGetImage(DrawablePtr pDrawable, int sx, int sy, int w, int h,
                      unsigned int format, unsigned long planeMask,
                      char *pdstLine)
{
  switch (pDrawable->bitsPerPixel)
  {
  case 1:
    mfbGetImage(pDrawable, sx, sy, w, h, format, planeMask, pdstLine);
    break;
  case 8:
    cfbGetImage(pDrawable, sx, sy, w, h, format, planeMask, pdstLine);
    break;
  case 16:
    cfb16GetImage(pDrawable, sx, sy, w, h, format, planeMask, pdstLine);
    break;
  case 32:
    cfb32GetImage(pDrawable, sx, sy, w, h, format, planeMask, pdstLine);
    break;
  }
}

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;
    XWDFileHeader *pXWDHeader;
    XWDColor *pXWDCmap;
    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;
    pXWDHeader = vfbScreens[pmap->pScreen->myNum].pXWDHeader;
    pXWDCmap = vfbScreens[pmap->pScreen->myNum].pXWDCmap;
    pVisual = pmap->pVisual;

    swapcopy32(pXWDHeader->visual_class, pVisual->c_class);
    swapcopy32(pXWDHeader->red_mask, pVisual->redMask);
    swapcopy32(pXWDHeader->green_mask, pVisual->greenMask);
    swapcopy32(pXWDHeader->blue_mask, pVisual->blueMask);
    swapcopy32(pXWDHeader->bits_per_rgb, pVisual->bitsPerRGBValue);
    swapcopy32(pXWDHeader->colormap_entries, pVisual->ColormapEntries);

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

    for (i = 0; i < entries; i++)  ppix[i] = i;
    /* XXX truecolor */
    QueryColors(pmap, entries, ppix, prgb);

    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);

    DEALLOCATE_LOCAL(ppix);
    DEALLOCATE_LOCAL(prgb);
    DEALLOCATE_LOCAL(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 void vfbStoreColors(ColormapPtr pmap, int ndef, xColorItem *pdefs)
{
  XWDColor *pXWDCmap;
  int i;

  if (pmap != InstalledMaps[pmap->pScreen->myNum]) return;

  pXWDCmap = vfbScreens[pmap->pScreen->myNum].pXWDCmap;

  if ((pmap->pVisual->c_class | DynamicClass) == DirectColor)
    return;

  for (i = 0; i < ndef; i++)
  {
    if (pdefs[i].flags & DoRed) {
      swapcopy16(pXWDCmap[pdefs[i].pixel].red, pdefs[i].red);
    }
    if (pdefs[i].flags & DoGreen) {
      swapcopy16(pXWDCmap[pdefs[i].pixel].green, pdefs[i].green);
    }
    if (pdefs[i].flags & DoBlue) {
      swapcopy16(pXWDCmap[pdefs[i].pixel].blue, pdefs[i].blue);
    }
  }
}

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

static char* vfbAllocateFramebufferMemory(vfbScreenInfoPtr pvfb)
{
  if (pvfb->pfbMemory) return pvfb->pfbMemory; /* already done */

  pvfb->sizeInBytes = pvfb->paddedWidthInBytes * pvfb->height;

  /* Calculate how many entries in colormap.  This is rather bogus, because
   * the visuals haven't even been set up yet, but we need to know because we
   * have to allocate space in the file for the colormap.  The number 10
   * below comes from the MAX_PSEUDO_DEPTH define in cfbcmap.c.
   */

  if (pvfb->depth <= 10)
  { /* single index colormaps */
    pvfb->ncolors = 1 << pvfb->depth;
  }
  else
  { /* decomposed colormaps */
    int nplanes_per_color_component = pvfb->depth / 3;
    if (pvfb->depth % 3) nplanes_per_color_component++;
    pvfb->ncolors = 1 << nplanes_per_color_component;
  }

  /* add extra bytes for XWDFileHeader, window name, and colormap */

  pvfb->sizeInBytes += SIZEOF(XWDheader) + XWD_WINDOW_NAME_LEN +
    pvfb->ncolors * SIZEOF(XWDColor);

  pvfb->pXWDHeader = NULL; 
  pvfb->pXWDHeader = (XWDFileHeader *)Xalloc(pvfb->sizeInBytes);

  if (pvfb->pXWDHeader)
  {
    pvfb->pXWDCmap = (XWDColor *)((char *)pvfb->pXWDHeader
                                  + SIZEOF(XWDheader) + XWD_WINDOW_NAME_LEN);
    pvfb->pfbMemory = (char *)(pvfb->pXWDCmap + pvfb->ncolors);
    memset(pvfb->pfbMemory, 0, pvfb->paddedWidthInBytes * pvfb->height);
    return pvfb->pfbMemory;
  }
  else
    return NULL;
}


static void vfbWriteXWDFileHeader(ScreenPtr pScreen)
{
  vfbScreenInfoPtr pvfb = &vfbScreens[pScreen->myNum];
  XWDFileHeader *pXWDHeader = pvfb->pXWDHeader;
  char hostname[XWD_WINDOW_NAME_LEN];
  VisualPtr	pVisual;
  unsigned long swaptest = 1;
  int i;

  needswap = *(char *) &swaptest;

  pXWDHeader->header_size = (char *)pvfb->pXWDCmap - (char *)pvfb->pXWDHeader;
  pXWDHeader->file_version = XWD_FILE_VERSION;

  pXWDHeader->pixmap_format = ZPixmap;
  pXWDHeader->pixmap_depth = pvfb->depth;
  pXWDHeader->pixmap_height = pXWDHeader->window_height = pvfb->height;
  pXWDHeader->xoffset = 0;
  pXWDHeader->byte_order = IMAGE_BYTE_ORDER;
  pXWDHeader->bitmap_bit_order = BITMAP_BIT_ORDER;
#ifndef INTERNAL_VS_EXTERNAL_PADDING
  pXWDHeader->pixmap_width = pXWDHeader->window_width = pvfb->width;
  pXWDHeader->bitmap_unit = BITMAP_SCANLINE_UNIT;
  pXWDHeader->bitmap_pad = BITMAP_SCANLINE_PAD;
#else
  pXWDHeader->pixmap_width = pXWDHeader->window_width = pvfb->paddedWidth;
  pXWDHeader->bitmap_unit = BITMAP_SCANLINE_UNIT_PROTO;
  pXWDHeader->bitmap_pad = BITMAP_SCANLINE_PAD_PROTO;
#endif
  pXWDHeader->bits_per_pixel = pvfb->bitsPerPixel;
  pXWDHeader->bytes_per_line = pvfb->paddedWidthInBytes;
  pXWDHeader->ncolors = pvfb->ncolors;

  /* visual related fields are written when colormap is installed */

  pXWDHeader->window_x = pXWDHeader->window_y = 0;
  pXWDHeader->window_bdrwidth = 0;

  /* write xwd "window" name: Xvfb hostname:server.screen */

  hostname[0] = 0;
  sprintf((char *)(pXWDHeader+1), "Xvfb %s:%s.%d", hostname, display,
          pScreen->myNum);

  /* write colormap pixel slot values */

  for (i = 0; i < pvfb->ncolors; i++)
  {
    pvfb->pXWDCmap[i].pixel = i;
  }

  /* byte swap to most significant byte first */

  if (needswap)
  {
    SwapLongs((CARD32 *)pXWDHeader, SIZEOF(XWDheader)/4);
    for (i = 0; i < pvfb->ncolors; i++)
    {
      register char n;
      swapl(&pvfb->pXWDCmap[i].pixel, n);
    }
  }
}


static Bool vfbCursorOffScreen(ScreenPtr *ppScreen, int *x, int *y) {
  return FALSE;
}
static void vfbCrossScreen (ScreenPtr pScreen, Bool entering) {}
static Bool vfbRealizeCursor(ScreenPtr pScreen, CursorPtr pCursor) {
  return TRUE;
}
static Bool vfbUnrealizeCursor(ScreenPtr pScreen, CursorPtr pCursor) {
  return TRUE;
}
static void vfbSetCursor(ScreenPtr pScreen, CursorPtr pCursor,
                               int x, int y) {}
static void vfbMoveCursor(ScreenPtr pScreen, int x, int y) {}

static miPointerSpriteFuncRec vfbPointerSpriteFuncs = {
  vfbRealizeCursor,
  vfbUnrealizeCursor,
  vfbSetCursor,
  vfbMoveCursor
};

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

static Bool vfbScreenInit(int index, ScreenPtr pScreen, int argc, char** argv)
{
  vfbScreenInfoPtr pvfb = &vfbScreens[index];
  int dpi = 100;
  int ret;
  char *pbits;

  if (monitorResolution) dpi = monitorResolution;

  pvfb->paddedWidthInBytes = PixmapBytePad(pvfb->width, pvfb->depth);
  pvfb->bitsPerPixel = vfbBitsPerPixel(pvfb->depth);
  pvfb->paddedWidth = pvfb->paddedWidthInBytes * 8 / pvfb->bitsPerPixel;
  pbits = vfbAllocateFramebufferMemory(pvfb);
  if (!pbits) return FALSE;
  vncFbptr[index] = pbits;

  defaultColorVisualClass
    = (pvfb->bitsPerPixel > 8) ? TrueColor : PseudoColor;

  switch (pvfb->bitsPerPixel)