//========================================================================
//
// SplashOutputDev.cc
//
// Copyright 2003 Glyph & Cog, LLC
//
//========================================================================

//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2005 Takashi Iwai <tiwai@suse.de>
// Copyright (C) 2006 Stefan Schweizer <genstef@gentoo.org>
// Copyright (C) 2006-2008 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2006 Krzysztof Kowalczyk <kkowalczyk@gmail.com>
// Copyright (C) 2006 Scott Turner <scotty1024@mac.com>
// Copyright (C) 2007 Koji Otani <sho@bbr.jp>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================

#include <config.h>

#ifdef USE_GCC_PRAGMAS
#pragma implementation
#endif

#include <string.h>
#include <math.h>
#include "goo/gfile.h"
#include "GlobalParams.h"
#include "Error.h"
#include "Object.h"
#include "GfxFont.h"
#include "Link.h"
#include "CharCodeToUnicode.h"
#include "FontEncodingTables.h"
#include "fofi/FoFiTrueType.h"
#include "splash/SplashBitmap.h"
#include "splash/SplashGlyphBitmap.h"
#include "splash/SplashPattern.h"
#include "splash/SplashScreen.h"
#include "splash/SplashPath.h"
#include "splash/SplashState.h"
#include "splash/SplashErrorCodes.h"
#include "splash/SplashFontEngine.h"
#include "splash/SplashFont.h"
#include "splash/SplashFontFile.h"
#include "splash/SplashFontFileID.h"
#include "splash/Splash.h"
#include "SplashOutputDev.h"

#ifdef VMS
#if (__VMS_VER < 70000000)
extern "C" int unlink(char *filename);
#endif
#endif

//------------------------------------------------------------------------

// Divide a 16-bit value (in [0, 255*255]) by 255, returning an 8-bit result.
static inline Guchar div255(int x) {
  return (Guchar)((x + (x >> 8) + 0x80) >> 8);
}

//------------------------------------------------------------------------
// Blend functions
//------------------------------------------------------------------------

static void splashOutBlendMultiply(SplashColorPtr src, SplashColorPtr dest,
				   SplashColorPtr blend, SplashColorMode cm) {
  int i;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    blend[i] = (dest[i] * src[i]) / 255;
  }
}

static void splashOutBlendScreen(SplashColorPtr src, SplashColorPtr dest,
				 SplashColorPtr blend, SplashColorMode cm) {
  int i;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    blend[i] = dest[i] + src[i] - (dest[i] * src[i]) / 255;
  }
}

static void splashOutBlendOverlay(SplashColorPtr src, SplashColorPtr dest,
				  SplashColorPtr blend, SplashColorMode cm) {
  int i;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    blend[i] = dest[i] < 0x80
                 ? (src[i] * 2 * dest[i]) / 255
                 : 255 - 2 * ((255 - src[i]) * (255 - dest[i])) / 255;
  }
}

static void splashOutBlendDarken(SplashColorPtr src, SplashColorPtr dest,
				 SplashColorPtr blend, SplashColorMode cm) {
  int i;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    blend[i] = dest[i] < src[i] ? dest[i] : src[i];
  }
}

static void splashOutBlendLighten(SplashColorPtr src, SplashColorPtr dest,
				  SplashColorPtr blend, SplashColorMode cm) {
  int i;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    blend[i] = dest[i] > src[i] ? dest[i] : src[i];
  }
}

static void splashOutBlendColorDodge(SplashColorPtr src, SplashColorPtr dest,
				     SplashColorPtr blend,
				     SplashColorMode cm) {
  int i, x;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    if (src[i] == 255) {
      blend[i] = 255;
    } else {
      x = (dest[i] * 255) / (255 - src[i]);
      blend[i] = x <= 255 ? x : 255;
    }
  }
}

static void splashOutBlendColorBurn(SplashColorPtr src, SplashColorPtr dest,
				    SplashColorPtr blend, SplashColorMode cm) {
  int i, x;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    if (src[i] == 0) {
      blend[i] = 0;
    } else {
      x = ((255 - dest[i]) * 255) / src[i];
      blend[i] = x <= 255 ? 255 - x : 0;
    }
  }
}

static void splashOutBlendHardLight(SplashColorPtr src, SplashColorPtr dest,
				    SplashColorPtr blend, SplashColorMode cm) {
  int i;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    blend[i] = src[i] < 0x80
                 ? (dest[i] * 2 * src[i]) / 255
                 : 255 - 2 * ((255 - dest[i]) * (255 - src[i])) / 255;
  }
}

static void splashOutBlendSoftLight(SplashColorPtr src, SplashColorPtr dest,
				    SplashColorPtr blend, SplashColorMode cm) {
  int i, x;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    if (src[i] < 0x80) {
      blend[i] = dest[i] - (255 - 2 * src[i]) * dest[i] * (255 - dest[i]) /
	         (255 * 255);
    } else {
      if (dest[i] < 0x40) {
	x = (((((16 * dest[i] - 12 * 255) * dest[i]) / 255)
	      + 4 * 255) * dest[i]) / 255;
      } else {
	x = (int)sqrt(255.0 * dest[i]);
      }
      blend[i] = dest[i] + (2 * src[i] - 255) * (x - dest[i]) / 255;
    }
  }
}

static void splashOutBlendDifference(SplashColorPtr src, SplashColorPtr dest,
				     SplashColorPtr blend,
				     SplashColorMode cm) {
  int i;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    blend[i] = dest[i] < src[i] ? src[i] - dest[i] : dest[i] - src[i];
  }
}

static void splashOutBlendExclusion(SplashColorPtr src, SplashColorPtr dest,
				    SplashColorPtr blend, SplashColorMode cm) {
  int i;

  for (i = 0; i < splashColorModeNComps[cm]; ++i) {
    blend[i] = dest[i] + src[i] - (2 * dest[i] * src[i]) / 255;
  }
}

static void cvtRGBToHSV(Guchar r, Guchar g, Guchar b, int *h, int *s, int *v) {
  int cmax, cmid, cmin, x;

  if (r >= g) {
    if (g >= b)      { x = 0; cmax = r; cmid = g; cmin = b; }
    else if (b >= r) { x = 4; cmax = b; cmid = r; cmin = g; }
    else             { x = 5; cmax = r; cmid = b; cmin = g; }
  } else {
    if (r >= b)      { x = 1; cmax = g; cmid = r; cmin = b; }
    else if (g >= b) { x = 2; cmax = g; cmid = b; cmin = r; }
    else             { x = 3; cmax = b; cmid = g; cmin = r; }
  }
  if (cmax == cmin) {
    *h = *s = 0;
  } else {
    *h = x * 60;
    if (x & 1) {
      *h += ((cmax - cmid) * 60) / (cmax - cmin);
    } else {
      *h += ((cmid - cmin) * 60) / (cmax - cmin);
    }
    *s = (255 * (cmax - cmin)) / cmax;
  }
  *v = cmax;
}

static void cvtHSVToRGB(int h, int s, int v, Guchar *r, Guchar *g, Guchar *b) {
  int x, f, cmax, cmid, cmin;

  if (s == 0) {
    *r = *g = *b = v;
  } else {
    x = h / 60;
    f = h % 60;
    cmax = v;
    if (x & 1) {
      cmid = div255(v * 255 - ((s * f) / 60));
    } else {
      cmid = div255(v * (255 - ((s * (60 - f)) / 60)));
    }
    cmin = div255(v * (255 - s));
    switch (x) {
    case 0: *r = cmax; *g = cmid; *b = cmin; break;
    case 1: *g = cmax; *r = cmid; *b = cmin; break;
    case 2: *g = cmax; *b = cmid; *r = cmin; break;
    case 3: *b = cmax; *g = cmid; *r = cmin; break;
    case 4: *b = cmax; *r = cmid; *g = cmin; break;
    case 5: *r = cmax; *b = cmid; *g = cmin; break;
    }
  }
}

static void splashOutBlendHue(SplashColorPtr src, SplashColorPtr dest,
			      SplashColorPtr blend, SplashColorMode cm) {
  int hs, ss, vs, hd, sd, vd;
#if SPLASH_CMYK
  Guchar r, g, b;
#endif

  switch (cm) {
  case splashModeMono1:
  case splashModeMono8:
    blend[0] = dest[0];
    break;
  case splashModeXBGR8:
    src[3] = 255;
  case splashModeRGB8:
  case splashModeBGR8:
    cvtRGBToHSV(src[0], src[1], src[2], &hs, &ss, &vs);
    cvtRGBToHSV(dest[0], dest[1], dest[2], &hd, &sd, &vd);
    cvtHSVToRGB(hs, sd, vd, &blend[0], &blend[1], &blend[2]);
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    //~ (0xff - ...) should be clipped
    cvtRGBToHSV(0xff - (src[0] + src[3]),
		0xff - (src[1] + src[3]),
		0xff - (src[2] + src[3]), &hs, &ss, &vs);
    cvtRGBToHSV(0xff - (dest[0] + dest[3]),
		0xff - (dest[1] + dest[3]),
		0xff - (dest[2] + dest[3]), &hd, &sd, &vd);
    cvtHSVToRGB(hs, sd, vd, &r, &g, &b);
    //~ should do black generation
    blend[0] = 0xff - r;
    blend[1] = 0xff - g;
    blend[2] = 0xff - b;
    blend[3] = 0;
    break;
#endif
  }
}

static void splashOutBlendSaturation(SplashColorPtr src, SplashColorPtr dest,
				     SplashColorPtr blend,
				     SplashColorMode cm) {
  int hs, ss, vs, hd, sd, vd;
#if SPLASH_CMYK
  Guchar r, g, b;
#endif

  switch (cm) {
  case splashModeMono1:
  case splashModeMono8:
    blend[0] = dest[0];
    break;
  case splashModeXBGR8:
    src[3] = 255;
  case splashModeRGB8:
  case splashModeBGR8:
    cvtRGBToHSV(src[0], src[1], src[2], &hs, &ss, &vs);
    cvtRGBToHSV(dest[0], dest[1], dest[2], &hd, &sd, &vd);
    cvtHSVToRGB(hd, ss, vd, &blend[0], &blend[1], &blend[2]);
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    //~ (0xff - ...) should be clipped
    cvtRGBToHSV(0xff - (src[0] + src[3]),
		0xff - (src[1] + src[3]),
		0xff - (src[2] + src[3]), &hs, &ss, &vs);
    cvtRGBToHSV(0xff - (dest[0] + dest[3]),
		0xff - (dest[1] + dest[3]),
		0xff - (dest[2] + dest[3]), &hd, &sd, &vd);
    cvtHSVToRGB(hd, ss, vd, &r, &g, &b);
    //~ should do black generation
    blend[0] = 0xff - r;
    blend[1] = 0xff - g;
    blend[2] = 0xff - b;
    blend[3] = 0;
    break;
#endif
  }
}

static void splashOutBlendColor(SplashColorPtr src, SplashColorPtr dest,
				SplashColorPtr blend, SplashColorMode cm) {
  int hs, ss, vs, hd, sd, vd;
#if SPLASH_CMYK
  Guchar r, g, b;
#endif

  switch (cm) {
  case splashModeMono1:
  case splashModeMono8:
    blend[0] = dest[0];
    break;
  case splashModeXBGR8:
    src[3] = 255;
  case splashModeRGB8:
  case splashModeBGR8:
    cvtRGBToHSV(src[0], src[1], src[2], &hs, &ss, &vs);
    cvtRGBToHSV(dest[0], dest[1], dest[2], &hd, &sd, &vd);
    cvtHSVToRGB(hs, ss, vd, &blend[0], &blend[1], &blend[2]);
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    //~ (0xff - ...) should be clipped
    cvtRGBToHSV(0xff - (src[0] + src[3]),
		0xff - (src[1] + src[3]),
		0xff - (src[2] + src[3]), &hs, &ss, &vs);
    cvtRGBToHSV(0xff - (dest[0] + dest[3]),
		0xff - (dest[1] + dest[3]),
		0xff - (dest[2] + dest[3]), &hd, &sd, &vd);
    cvtHSVToRGB(hs, ss, vd, &r, &g, &b);
    //~ should do black generation
    blend[0] = 0xff - r;
    blend[1] = 0xff - g;
    blend[2] = 0xff - b;
    blend[3] = 0;
    break;
#endif
  }
}

static void splashOutBlendLuminosity(SplashColorPtr src, SplashColorPtr dest,
				     SplashColorPtr blend,
				     SplashColorMode cm) {
  int hs, ss, vs, hd, sd, vd;
#if SPLASH_CMYK
  Guchar r, g, b;
#endif

  switch (cm) {
  case splashModeMono1:
  case splashModeMono8:
    blend[0] = dest[0];
    break;
  case splashModeXBGR8:
    src[3] = 255;
  case splashModeRGB8:
  case splashModeBGR8:
    cvtRGBToHSV(src[0], src[1], src[2], &hs, &ss, &vs);
    cvtRGBToHSV(dest[0], dest[1], dest[2], &hd, &sd, &vd);
    cvtHSVToRGB(hd, sd, vs, &blend[0], &blend[1], &blend[2]);
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    //~ (0xff - ...) should be clipped
    cvtRGBToHSV(0xff - (src[0] + src[3]),
		0xff - (src[1] + src[3]),
		0xff - (src[2] + src[3]), &hs, &ss, &vs);
    cvtRGBToHSV(0xff - (dest[0] + dest[3]),
		0xff - (dest[1] + dest[3]),
		0xff - (dest[2] + dest[3]), &hd, &sd, &vd);
    cvtHSVToRGB(hd, sd, vs, &r, &g, &b);
    //~ should do black generation
    blend[0] = 0xff - r;
    blend[1] = 0xff - g;
    blend[2] = 0xff - b;
    blend[3] = 0;
    break;
#endif
  }
}

// NB: This must match the GfxBlendMode enum defined in GfxState.h.
static const SplashBlendFunc splashOutBlendFuncs[] = {
  NULL,
  &splashOutBlendMultiply,
  &splashOutBlendScreen,
  &splashOutBlendOverlay,
  &splashOutBlendDarken,
  &splashOutBlendLighten,
  &splashOutBlendColorDodge,
  &splashOutBlendColorBurn,
  &splashOutBlendHardLight,
  &splashOutBlendSoftLight,
  &splashOutBlendDifference,
  &splashOutBlendExclusion,
  &splashOutBlendHue,
  &splashOutBlendSaturation,
  &splashOutBlendColor,
  &splashOutBlendLuminosity
};

//------------------------------------------------------------------------
// SplashOutFontFileID
//------------------------------------------------------------------------

class SplashOutFontFileID: public SplashFontFileID {
public:

  SplashOutFontFileID(Ref *rA) { r = *rA; }

  ~SplashOutFontFileID() {}

  GBool matches(SplashFontFileID *id) {
    return ((SplashOutFontFileID *)id)->r.num == r.num &&
           ((SplashOutFontFileID *)id)->r.gen == r.gen;
  }

private:

  Ref r;
};

//------------------------------------------------------------------------
// T3FontCache
//------------------------------------------------------------------------

struct T3FontCacheTag {
  Gushort code;
  Gushort mru;			// valid bit (0x8000) and MRU index
};

class T3FontCache {
public:

  T3FontCache(Ref *fontID, double m11A, double m12A,
	      double m21A, double m22A,
	      int glyphXA, int glyphYA, int glyphWA, int glyphHA,
	      GBool aa, GBool validBBoxA);
  ~T3FontCache();
  GBool matches(Ref *idA, double m11A, double m12A,
		double m21A, double m22A)
    { return fontID.num == idA->num && fontID.gen == idA->gen &&
	     m11 == m11A && m12 == m12A && m21 == m21A && m22 == m22A; }

  Ref fontID;			// PDF font ID
  double m11, m12, m21, m22;	// transform matrix
  int glyphX, glyphY;		// pixel offset of glyph bitmaps
  int glyphW, glyphH;		// size of glyph bitmaps, in pixels
  GBool validBBox;		// false if the bbox was [0 0 0 0]
  int glyphSize;		// size of glyph bitmaps, in bytes
  int cacheSets;		// number of sets in cache
  int cacheAssoc;		// cache associativity (glyphs per set)
  Guchar *cacheData;		// glyph pixmap cache
  T3FontCacheTag *cacheTags;	// cache tags, i.e., char codes
};

T3FontCache::T3FontCache(Ref *fontIDA, double m11A, double m12A,
			 double m21A, double m22A,
			 int glyphXA, int glyphYA, int glyphWA, int glyphHA,
			 GBool validBBoxA, GBool aa) {
  int i;

  fontID = *fontIDA;
  m11 = m11A;
  m12 = m12A;
  m21 = m21A;
  m22 = m22A;
  glyphX = glyphXA;
  glyphY = glyphYA;
  glyphW = glyphWA;
  glyphH = glyphHA;
  validBBox = validBBoxA;
  if (aa) {
    glyphSize = glyphW * glyphH;
  } else {
    glyphSize = ((glyphW + 7) >> 3) * glyphH;
  }
  cacheAssoc = 8;
  if (glyphSize <= 256) {
    cacheSets = 8;
  } else if (glyphSize <= 512) {
    cacheSets = 4;
  } else if (glyphSize <= 1024) {
    cacheSets = 2;
  } else if (glyphSize <= 2048) {
    cacheSets = 1;
    cacheAssoc = 4;
  } else if (glyphSize <= 4096) {
    cacheSets = 1;
    cacheAssoc = 2;
  } else {
    cacheSets = 1;
    cacheAssoc = 1;
  }
  if (glyphSize < 10485760 / cacheAssoc / cacheSets) {
    cacheData = (Guchar *)gmallocn_checkoverflow(cacheSets * cacheAssoc, glyphSize);
  } else {
    error(-1, "Not creating cacheData for T3FontCache, it asked for too much memory.\n"
              "       This could teoretically result in wrong rendering,\n"
              "       but most probably the document is bogus.\n"
              "       Please report a bug if you think the rendering may be wrong because of this.");
    cacheData = NULL;
  }
  if (cacheData != NULL)
  {
    cacheTags = (T3FontCacheTag *)gmallocn(cacheSets * cacheAssoc,
					 sizeof(T3FontCacheTag));
    for (i = 0; i < cacheSets * cacheAssoc; ++i) {
      cacheTags[i].mru = i & (cacheAssoc - 1);
    }
  }
  else
  {
    cacheTags = NULL;
  }
}

T3FontCache::~T3FontCache() {
  gfree(cacheData);
  gfree(cacheTags);
}

struct T3GlyphStack {
  Gushort code;			// character code

  //----- cache info
  T3FontCache *cache;		// font cache for the current font
  T3FontCacheTag *cacheTag;	// pointer to cache tag for the glyph
  Guchar *cacheData;		// pointer to cache data for the glyph

  //----- saved state
  SplashBitmap *origBitmap;
  Splash *origSplash;
  double origCTM4, origCTM5;

  T3GlyphStack *next;		// next object on stack
};

//------------------------------------------------------------------------
// SplashTransparencyGroup
//------------------------------------------------------------------------

struct SplashTransparencyGroup {
  int tx, ty;			// translation coordinates
  SplashBitmap *tBitmap;	// bitmap for transparency group
  GfxColorSpace *blendingColorSpace;
  GBool isolated;

  //----- saved state
  SplashBitmap *origBitmap;
  Splash *origSplash;

  SplashTransparencyGroup *next;
};

//------------------------------------------------------------------------
// SplashOutputDev
//------------------------------------------------------------------------

SplashOutputDev::SplashOutputDev(SplashColorMode colorModeA,
				 int bitmapRowPadA,
				 GBool reverseVideoA,
				 SplashColorPtr paperColorA,
				 GBool bitmapTopDownA,
				 GBool allowAntialiasA) {
  colorMode = colorModeA;
  bitmapRowPad = bitmapRowPadA;
  bitmapTopDown = bitmapTopDownA;
  allowAntialias = allowAntialiasA;
  vectorAntialias = allowAntialias &&
		      globalParams->getVectorAntialias() &&
		      colorMode != splashModeMono1;
  setupScreenParams(72.0, 72.0);
  reverseVideo = reverseVideoA;
  splashColorCopy(paperColor, paperColorA);

  xref = NULL;

  bitmap = new SplashBitmap(1, 1, bitmapRowPad, colorMode,
			    colorMode != splashModeMono1, bitmapTopDown);
  splash = new Splash(bitmap, vectorAntialias, &screenParams);
  splash->clear(paperColor, 0);

  fontEngine = NULL;

  nT3Fonts = 0;
  t3GlyphStack = NULL;

  font = NULL;
  needFontUpdate = gFalse;
  textClipPath = NULL;

  transpGroupStack = NULL;
}

void SplashOutputDev::setupScreenParams(double hDPI, double vDPI) {
  screenParams.size = globalParams->getScreenSize();
  screenParams.dotRadius = globalParams->getScreenDotRadius();
  screenParams.gamma = (SplashCoord)globalParams->getScreenGamma();
  screenParams.blackThreshold =
      (SplashCoord)globalParams->getScreenBlackThreshold();
  screenParams.whiteThreshold =
      (SplashCoord)globalParams->getScreenWhiteThreshold();
  switch (globalParams->getScreenType()) {
  case screenDispersed:
    screenParams.type = splashScreenDispersed;
    if (screenParams.size < 0) {
      screenParams.size = 4;
    }
    break;
  case screenClustered:
    screenParams.type = splashScreenClustered;
    if (screenParams.size < 0) {
      screenParams.size = 10;
    }
    break;
  case screenStochasticClustered:
    screenParams.type = splashScreenStochasticClustered;
    if (screenParams.size < 0) {
      screenParams.size = 100;
    }
    if (screenParams.dotRadius < 0) {
      screenParams.dotRadius = 2;
    }
    break;
  case screenUnset:
  default:
    // use clustered dithering for resolution >= 300 dpi
    // (compare to 299.9 to avoid floating point issues)
    if (hDPI > 299.9 && vDPI > 299.9) {
      screenParams.type = splashScreenStochasticClustered;
      if (screenParams.size < 0) {
	screenParams.size = 100;
      }
      if (screenParams.dotRadius < 0) {
	screenParams.dotRadius = 2;
      }
    } else {
      screenParams.type = splashScreenDispersed;
      if (screenParams.size < 0) {
	screenParams.size = 4;
      }
    }
  }
}

SplashOutputDev::~SplashOutputDev() {
  int i;

  for (i = 0; i < nT3Fonts; ++i) {
    delete t3FontCache[i];
  }
  if (fontEngine) {
    delete fontEngine;
  }
  if (splash) {
    delete splash;
  }
  if (bitmap) {
    delete bitmap;
  }
}

void SplashOutputDev::startDoc(XRef *xrefA) {
  int i;

  xref = xrefA;
  if (fontEngine) {
    delete fontEngine;
  }
  fontEngine = new SplashFontEngine(
#if HAVE_T1LIB_H
				    globalParams->getEnableT1lib(),
#endif
#if HAVE_FREETYPE_FREETYPE_H || HAVE_FREETYPE_H
				    globalParams->getEnableFreeType(),
#endif
				    allowAntialias &&
				      globalParams->getAntialias() &&
				      colorMode != splashModeMono1);
  for (i = 0; i < nT3Fonts; ++i) {
    delete t3FontCache[i];
  }
  nT3Fonts = 0;
}

void SplashOutputDev::startPage(int pageNum, GfxState *state) {
  int w, h;
  double *ctm;
  SplashCoord mat[6];
  SplashColor color;

  if (state) {
    setupScreenParams(state->getHDPI(), state->getVDPI());
    w = (int)(state->getPageWidth() + 0.5);
    if (w <= 0) {
      w = 1;
    }
    h = (int)(state->getPageHeight() + 0.5);
    if (h <= 0) {
      h = 1;
    }
  } else {
    w = h = 1;
  }
  if (splash) {
    delete splash;
  }
  if (!bitmap || w != bitmap->getWidth() || h != bitmap->getHeight()) {
    if (bitmap) {
      delete bitmap;
    }
    bitmap = new SplashBitmap(w, h, bitmapRowPad, colorMode,
			      colorMode != splashModeMono1, bitmapTopDown);
  }
  splash = new Splash(bitmap, vectorAntialias, &screenParams);
  if (state) {
    ctm = state->getCTM();
    mat[0] = (SplashCoord)ctm[0];
    mat[1] = (SplashCoord)ctm[1];
    mat[2] = (SplashCoord)ctm[2];
    mat[3] = (SplashCoord)ctm[3];
    mat[4] = (SplashCoord)ctm[4];
    mat[5] = (SplashCoord)ctm[5];
    splash->setMatrix(mat);
  }
  switch (colorMode) {
  case splashModeMono1:
  case splashModeMono8:
    color[0] = 0;
    break;
  case splashModeXBGR8:
    color[3] = 255;
  case splashModeRGB8:
  case splashModeBGR8:
    color[0] = color[1] = color[2] = 0;
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    color[0] = color[1] = color[2] = color[3] = 0;
    break;
#endif
  }
  splash->setStrokePattern(new SplashSolidColor(color));
  splash->setFillPattern(new SplashSolidColor(color));
  splash->setLineCap(splashLineCapButt);
  splash->setLineJoin(splashLineJoinMiter);
  splash->setLineDash(NULL, 0, 0);
  splash->setMiterLimit(10);
  splash->setFlatness(1);
  // the SA parameter supposedly defaults to false, but Acrobat
  // apparently hardwires it to true
  splash->setStrokeAdjust(globalParams->getStrokeAdjust());
  splash->clear(paperColor, 0);
}

void SplashOutputDev::endPage() {
  if (colorMode != splashModeMono1) {
    splash->compositeBackground(paperColor);
  }
}

void SplashOutputDev::saveState(GfxState *state) {
  splash->saveState();
}

void SplashOutputDev::restoreState(GfxState *state) {
  splash->restoreState();
  needFontUpdate = gTrue;
}

void SplashOutputDev::updateAll(GfxState *state) {
  updateLineDash(state);
  updateLineJoin(state);
  updateLineCap(state);
  updateLineWidth(state);
  updateFlatness(state);
  updateMiterLimit(state);
  updateStrokeAdjust(state);
  updateFillColor(state);
  updateStrokeColor(state);
  needFontUpdate = gTrue;
}

void SplashOutputDev::updateCTM(GfxState *state, double m11, double m12,
				double m21, double m22,
				double m31, double m32) {
  double *ctm;
  SplashCoord mat[6];

  ctm = state->getCTM();
  mat[0] = (SplashCoord)ctm[0];
  mat[1] = (SplashCoord)ctm[1];
  mat[2] = (SplashCoord)ctm[2];
  mat[3] = (SplashCoord)ctm[3];
  mat[4] = (SplashCoord)ctm[4];
  mat[5] = (SplashCoord)ctm[5];
  splash->setMatrix(mat);
}

void SplashOutputDev::updateLineDash(GfxState *state) {
  double *dashPattern;
  int dashLength;
  double dashStart;
  SplashCoord dash[20];
  int i;

  state->getLineDash(&dashPattern, &dashLength, &dashStart);
  if (dashLength > 20) {
    dashLength = 20;
  }
  for (i = 0; i < dashLength; ++i) {
    dash[i] = (SplashCoord)dashPattern[i];
    if (dash[i] < 0) {
      dash[i] = 0;
    }
  }
  splash->setLineDash(dash, dashLength, (SplashCoord)dashStart);
}

void SplashOutputDev::updateFlatness(GfxState *state) {
  splash->setFlatness(state->getFlatness());
}

void SplashOutputDev::updateLineJoin(GfxState *state) {
  splash->setLineJoin(state->getLineJoin());
}

void SplashOutputDev::updateLineCap(GfxState *state) {
  splash->setLineCap(state->getLineCap());
}

void SplashOutputDev::updateMiterLimit(GfxState *state) {
  splash->setMiterLimit(state->getMiterLimit());
}

void SplashOutputDev::updateLineWidth(GfxState *state) {
  splash->setLineWidth(state->getLineWidth());
}

void SplashOutputDev::updateStrokeAdjust(GfxState * /*state*/) {
#if 0 // the SA parameter supposedly defaults to false, but Acrobat
      // apparently hardwires it to true
  splash->setStrokeAdjust(state->getStrokeAdjust());
#endif
}

void SplashOutputDev::updateFillColor(GfxState *state) {
  GfxGray gray;
  GfxRGB rgb;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif

  state->getFillGray(&gray);
  state->getFillRGB(&rgb);
#if SPLASH_CMYK
  state->getFillCMYK(&cmyk);
  splash->setFillPattern(getColor(gray, &rgb, &cmyk));
#else
  splash->setFillPattern(getColor(gray, &rgb));
#endif
}

void SplashOutputDev::updateStrokeColor(GfxState *state) {
  GfxGray gray;
  GfxRGB rgb;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif

  state->getStrokeGray(&gray);
  state->getStrokeRGB(&rgb);
#if SPLASH_CMYK
  state->getStrokeCMYK(&cmyk);
  splash->setStrokePattern(getColor(gray, &rgb, &cmyk));
#else
  splash->setStrokePattern(getColor(gray, &rgb));
#endif
}

#if SPLASH_CMYK
SplashPattern *SplashOutputDev::getColor(GfxGray gray, GfxRGB *rgb,
					 GfxCMYK *cmyk) {
#else
SplashPattern *SplashOutputDev::getColor(GfxGray gray, GfxRGB *rgb) {
#endif
  SplashPattern *pattern;
  SplashColor color;
  GfxColorComp r, g, b;

  if (reverseVideo) {
    gray = gfxColorComp1 - gray;
    r = gfxColorComp1 - rgb->r;
    g = gfxColorComp1 - rgb->g;
    b = gfxColorComp1 - rgb->b;
  } else {
    r = rgb->r;
    g = rgb->g;
    b = rgb->b;
  }

  pattern = NULL; // make gcc happy
  switch (colorMode) {
  case splashModeMono1:
  case splashModeMono8:
    color[0] = colToByte(gray);
    pattern = new SplashSolidColor(color);
    break;
  case splashModeXBGR8:
    color[3] = 255;
  case splashModeRGB8:
  case splashModeBGR8:
    color[0] = colToByte(r);
    color[1] = colToByte(g);
    color[2] = colToByte(b);
    pattern = new SplashSolidColor(color);
    break;
#if SPLASH_CMYK
  case splashModeCMYK8:
    color[0] = colToByte(cmyk->c);
    color[1] = colToByte(cmyk->m);
    color[2] = colToByte(cmyk->y);
    color[3] = colToByte(cmyk->k);
    pattern = new SplashSolidColor(color);
    break;
#endif
  }

  return pattern;
}

void SplashOutputDev::updateBlendMode(GfxState *state) {
  splash->setBlendFunc(splashOutBlendFuncs[state->getBlendMode()]);
}

void SplashOutputDev::updateFillOpacity(GfxState *state) {
  splash->setFillAlpha((SplashCoord)state->getFillOpacity());
}

void SplashOutputDev::updateStrokeOpacity(GfxState *state) {
  splash->setStrokeAlpha((SplashCoord)state->getStrokeOpacity());
}

void SplashOutputDev::updateFont(GfxState * /*state*/) {
  needFontUpdate = gTrue;
}

void SplashOutputDev::doUpdateFont(GfxState *state) {
  GfxFont *gfxFont;
  GfxFontType fontType;
  SplashOutFontFileID *id;
  SplashFontFile *fontFile;
  SplashFontSrc *fontsrc = NULL;
  FoFiTrueType *ff;
  Ref embRef;
  Object refObj, strObj;
  GooString *fileName;
  char *tmpBuf;
  int tmpBufLen;
  Gushort *codeToGID;
  DisplayFontParam *dfp;
  double *textMat;
  double m11, m12, m21, m22, fontSize;
  SplashCoord mat[4];
  int substIdx, n;
  int faceIndex = 0;
  GBool recreateFont = gFalse;
  GBool doAdjustFontMatrix = gFalse;

  needFontUpdate = gFalse;
  font = NULL;
  fileName = NULL;
  tmpBuf = NULL;
  substIdx = -1;
  dfp = NULL;

  if (!(gfxFont = state->getFont())) {
    goto err1;
  }
  fontType = gfxFont->getType();
  if (fontType == fontType3) {
    goto err1;
  }

  // check the font file cache
  id = new SplashOutFontFileID(gfxFont->getID());
  if ((fontFile = fontEngine->getFontFile(id))) {
    delete id;

  } else {

    // if there is an embedded font, write it to disk
    if (gfxFont->getEmbeddedFontID(&embRef)) {
      tmpBuf = gfxFont->readEmbFontFile(xref, &tmpBufLen);
      if (! tmpBuf)
	goto err2;

    // if there is an external font file, use it
    } else if (!(fileName = gfxFont->getExtFontFile())) {

      // look for a display font mapping or a substitute font
      dfp = NULL;
      if (gfxFont->getName()) {
        dfp = globalParams->getDisplayFont(gfxFont);
      }
      if (!dfp) {
	error(-1, "Couldn't find a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      switch (dfp->kind) {
      case displayFontT1:
	fileName = dfp->t1.fileName;
	fontType = gfxFont->isCIDFont() ? fontCIDType0 : fontType1;
	break;
      case displayFontTT:
	fileName = dfp->tt.fileName;
	fontType = gfxFont->isCIDFont() ? fontCIDType2 : fontTrueType;
	faceIndex = dfp->tt.faceIndex;
	break;
      }
      doAdjustFontMatrix = gTrue;
    }

    fontsrc = new SplashFontSrc;
    if (fileName)
      fontsrc->setFile(fileName, gFalse);
    else
      fontsrc->setBuf(tmpBuf, tmpBufLen, gTrue);

    // load the font file
    switch (fontType) {
    case fontType1:
      if (!(fontFile = fontEngine->loadType1Font(
			   id,
			   fontsrc,
			   ((Gfx8BitFont *)gfxFont)->getEncoding()))) {
	error(-1, "Couldn't create a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontType1C:
      if (!(fontFile = fontEngine->loadType1CFont(
			   id,
			   fontsrc,
			   ((Gfx8BitFont *)gfxFont)->getEncoding()))) {
	error(-1, "Couldn't create a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontType1COT:
      if (!(fontFile = fontEngine->loadOpenTypeT1CFont(
			   id,
			   fontsrc,
			   ((Gfx8BitFont *)gfxFont)->getEncoding()))) {
	error(-1, "Couldn't create a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontTrueType:
    case fontTrueTypeOT:
	if (fileName)
	 ff = FoFiTrueType::load(fileName->getCString());
	else
	ff = FoFiTrueType::make(tmpBuf, tmpBufLen);
      if (ff) {
	codeToGID = ((Gfx8BitFont *)gfxFont)->getCodeToGIDMap(ff);
	n = 256;
	delete ff;
      } else {
	codeToGID = NULL;
	n = 0;
      }
      if (!(fontFile = fontEngine->loadTrueTypeFont(
			   id,
			   fontsrc,
			   codeToGID, n))) {
	error(-1, "Couldn't create a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontCIDType0:
    case fontCIDType0C:
      if (!(fontFile = fontEngine->loadCIDFont(
			   id,
			   fontsrc))) {
	error(-1, "Couldn't create a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontCIDType0COT:
      if (!(fontFile = fontEngine->loadOpenTypeCFFFont(
			   id,
			   fontsrc))) {
	error(-1, "Couldn't create a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    case fontCIDType2:
    case fontCIDType2OT:
      codeToGID = NULL;
      n = 0;
      if (((GfxCIDFont *)gfxFont)->getCIDToGID()) {
	n = ((GfxCIDFont *)gfxFont)->getCIDToGIDLen();
	if (n) {
	  codeToGID = (Gushort *)gmallocn(n, sizeof(Gushort));
	  memcpy(codeToGID, ((GfxCIDFont *)gfxFont)->getCIDToGID(),
		  n * sizeof(Gushort));
	}
      } else {
	if (fileName)
	  ff = FoFiTrueType::load(fileName->getCString());
	else
	  ff = FoFiTrueType::make(tmpBuf, tmpBufLen);
	if (! ff)
	{
	  error(-1, "Couldn't create a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	  goto err2;
	}
	codeToGID = ((GfxCIDFont *)gfxFont)->getCodeToGIDMap(ff, &n);
	delete ff;
      }
      if (!(fontFile = fontEngine->loadTrueTypeFont(
			   id,
			   fontsrc,
			   codeToGID, n, faceIndex))) {
	error(-1, "Couldn't create a font for '%s'",
	      gfxFont->getName() ? gfxFont->getName()->getCString()
	                         : "(unnamed)");
	goto err2;
      }
      break;
    default:
      // this shouldn't happen
      goto err2;
    }
    fontFile->doAdjustMatrix = doAdjustFontMatrix;
  }

  // get the font matrix
  textMat = state->getTextMat();
  fontSize = state->getFontSize();
  m11 = textMat[0] * fontSize * state->getHorizScaling();
  m12 = textMat[1] * fontSize * state->getHorizScaling();
  m21 = textMat[2] * fontSize;
  m22 = textMat[3] * fontSize;

  // create the scaled font
  mat[0] = m11;  mat[1] = m12;
  mat[2] = m21;  mat[3] = m22;
  font = fontEngine->getFont(fontFile, mat, splash->getMatrix());

  // for substituted fonts: adjust the font matrix -- compare the
  // width of 'm' in the original font and the substituted font
  if (fontFile->doAdjustMatrix && !gfxFont->isCIDFont()) {
    double w1, w2;
    CharCode code;
    char *name;
    for (code = 0; code < 256; ++code) {
      if ((name = ((Gfx8BitFont *)gfxFont)->getCharName(code)) &&
          name[0] == 'm' && name[1] == '\0') {
        break;
      }
    }
    if (code < 256) {
      w1 = ((Gfx8BitFont *)gfxFont)->getWidth(code);
      w2 = font->getGlyphAdvance(code);
      if (!gfxFont->isSymbolic() && w2 > 0) {
        // if real font is substantially narrower than substituted
        // font, reduce the font size accordingly
        if (w1 > 0.01 && w1 < 0.9 * w2) {
          w1 /= w2;
          m11 *= w1;
          m21 *= w1;
          recreateFont = gTrue;
        }
      }
    }
  }

  if (recreateFont)
  {
    mat[0] = m11;  mat[1] = m12;
    mat[2] = m21;  mat[3] = m22;
    font = fontEngine->getFont(fontFile, mat, splash->getMatrix());
  }

  if (fontsrc && !fontsrc->isFile)
      fontsrc->unref();
  return;

 err2:
  delete id;
 err1:
  if (fontsrc && !fontsrc->isFile)
      fontsrc->unref();
  return;
}

void SplashOutputDev::stroke(GfxState *state) {
  SplashPath *path;

  if (state->getStrokeColorSpace()->isNonMarking()) {
    return;
  }
  path = convertPath(state, state->getPath());
  splash->stroke(path);
  delete path;
}

void SplashOutputDev::fill(GfxState *state) {
  SplashPath *path;

  if (state->getFillColorSpace()->isNonMarking()) {
    return;
  }
  path = convertPath(state, state->getPath());
  splash->fill(path, gFalse);
  delete path;
}

void SplashOutputDev::eoFill(GfxState *state) {
  SplashPath *path;

  if (state->getFillColorSpace()->isNonMarking()) {
    return;
  }
  path = convertPath(state, state->getPath());
  splash->fill(path, gTrue);
  delete path;
}

void SplashOutputDev::clip(GfxState *state) {
  SplashPath *path;

  path = convertPath(state, state->getPath());
  splash->clipToPath(path, gFalse);
  delete path;
}

void SplashOutputDev::eoClip(GfxState *state) {
  SplashPath *path;

  path = convertPath(state, state->getPath());
  splash->clipToPath(path, gTrue);
  delete path;
}

void SplashOutputDev::clipToStrokePath(GfxState *state) {
  SplashPath *path, *path2;

  path = convertPath(state, state->getPath());
  path2 = splash->makeStrokePath(path);
  delete path;
  splash->clipToPath(path2, gFalse);
  delete path2;
}

SplashPath *SplashOutputDev::convertPath(GfxState * /*state*/, GfxPath *path) {
  SplashPath *sPath;
  GfxSubpath *subpath;
  int i, j;

  sPath = new SplashPath();
  for (i = 0; i < path->getNumSubpaths(); ++i) {
    subpath = path->getSubpath(i);
    if (subpath->getNumPoints() > 0) {
      sPath->moveTo((SplashCoord)subpath->getX(0),
		    (SplashCoord)subpath->getY(0));
      j = 1;
      while (j < subpath->getNumPoints()) {
	if (subpath->getCurve(j)) {
	  sPath->curveTo((SplashCoord)subpath->getX(j),
			 (SplashCoord)subpath->getY(j),
			 (SplashCoord)subpath->getX(j+1),
			 (SplashCoord)subpath->getY(j+1),
			 (SplashCoord)subpath->getX(j+2),
			 (SplashCoord)subpath->getY(j+2));
	  j += 3;
	} else {
	  sPath->lineTo((SplashCoord)subpath->getX(j),
			(SplashCoord)subpath->getY(j));
	  ++j;
	}
      }
      if (subpath->isClosed()) {
	sPath->close();
      }
    }
  }
  return sPath;
}

void SplashOutputDev::drawChar(GfxState *state, double x, double y,
			       double dx, double dy,
			       double originX, double originY,
			       CharCode code, int nBytes,
			       Unicode *u, int uLen) {
  SplashPath *path;
  int render;

  // check for invisible text -- this is used by Acrobat Capture
  render = state->getRender();
  if (render == 3) {
    return;
  }

  if (needFontUpdate) {
    doUpdateFont(state);
  }
  if (!font) {
    return;
  }

  x -= originX;
  y -= originY;

  // fill
  if (!(render & 1)) {
    if (!state->getFillColorSpace()->isNonMarking()) {
      splash->fillChar((SplashCoord)x, (SplashCoord)y, code, font);
    }
  }

  // stroke
  if ((render & 3) == 1 || (render & 3) == 2) {
    if (!state->getStrokeColorSpace()->isNonMarking()) {
      if ((path = font->getGlyphPath(code))) {
	path->offset((SplashCoord)x, (SplashCoord)y);
	splash->stroke(path);
	delete path;
      }
    }
  }

  // clip
  if (render & 4) {
    if ((path = font->getGlyphPath(code))) {
      path->offset((SplashCoord)x, (SplashCoord)y);
      if (textClipPath) {
	textClipPath->append(path);
	delete path;
      } else {
	textClipPath = path;
      }
    }
  }
}

GBool SplashOutputDev::beginType3Char(GfxState *state, double x, double y,
				      double dx, double dy,
				      CharCode code, Unicode *u, int uLen) {
  GfxFont *gfxFont;
  Ref *fontID;
  double *ctm, *bbox;
  T3FontCache *t3Font;
  T3GlyphStack *t3gs;
  GBool validBBox;
  double x1, y1, xMin, yMin, xMax, yMax, xt, yt;
  int i, j;

  if (!(gfxFont = state->getFont())) {
    return gFalse;
  }
  fontID = gfxFont->getID();
  ctm = state->getCTM();
  state->transform(0, 0, &xt, &yt);

  // is it the first (MRU) font in the cache?
  if (!(nT3Fonts > 0 &&
	t3FontCache[0]->matches(fontID, ctm[0], ctm[1], ctm[2], ctm[3]))) {

    // is the font elsewhere in the cache?
    for (i = 1; i < nT3Fonts; ++i) {
      if (t3FontCache[i]->matches(fontID, ctm[0], ctm[1], ctm[2], ctm[3])) {
	t3Font = t3FontCache[i];
	for (j = i; j > 0; --j) {
	  t3FontCache[j] = t3FontCache[j - 1];
	}
	t3FontCache[0] = t3Font;
	break;
      }
    }
    if (i >= nT3Fonts) {

      // create new entry in the font cache
      if (nT3Fonts == splashOutT3FontCacheSize) {
	delete t3FontCache[nT3Fonts - 1];
	--nT3Fonts;
      }
      for (j = nT3Fonts; j > 0; --j) {
	t3FontCache[j] = t3FontCache[j - 1];
      }
      ++nT3Fonts;
      bbox = gfxFont->getFontBBox();
      if (bbox[0] == 0 && bbox[1] == 0 && bbox[2] == 0 && bbox[3] == 0) {
	// unspecified bounding box -- just take a guess
	xMin = xt - 5;
	xMax = xMin + 30;
	yMax = yt + 15;
	yMin = yMax - 45;
	validBBox = gFalse;
      } else {
	state->transform(bbox[0], bbox[1], &x1, &y1);
	xMin = xMax = x1;
	yMin = yMax = y1;
	state->transform(bbox[0], bbox[3], &x1, &y1);
	if (x1 < xMin) {
	  xMin = x1;
	} else if (x1 > xMax) {
	  xMax = x1;
	}
	if (y1 < yMin) {
	  yMin = y1;
	} else if (y1 > yMax) {
	  yMax = y1;
	}
	state->transform(bbox[2], bbox[1], &x1, &y1);
	if (x1 < xMin) {
	  xMin = x1;
	} else if (x1 > xMax) {
	  xMax = x1;
	}
	if (y1 < yMin) {
	  yMin = y1;
	} else if (y1 > yMax) {
	  yMax = y1;
	}
	state->transform(bbox[2], bbox[3], &x1, &y1);
	if (x1 < xMin) {
	  xMin = x1;
	} else if (x1 > xMax) {
	  xMax = x1;
	}
	if (y1 < yMin) {
	  yMin = y1;
	} else if (y1 > yMax) {
	  yMax = y1;
	}
	validBBox = gTrue;
      }
      t3FontCache[0] = new T3FontCache(fontID, ctm[0], ctm[1], ctm[2], ctm[3],
	                               (int)floor(xMin - xt),
				       (int)floor(yMin - yt),
				       (int)ceil(xMax) - (int)floor(xMin) + 3,
				       (int)ceil(yMax) - (int)floor(yMin) + 3,
				       validBBox,
				       colorMode != splashModeMono1);
    }
  }
  t3Font = t3FontCache[0];

  // is the glyph in the cache?
  i = (code & (t3Font->cacheSets - 1)) * t3Font->cacheAssoc;
  for (j = 0; j < t3Font->cacheAssoc; ++j) {
    if (t3Font->cacheTags != NULL) {
      if ((t3Font->cacheTags[i+j].mru & 0x8000) &&
	t3Font->cacheTags[i+j].code == code) {
        drawType3Glyph(t3Font, &t3Font->cacheTags[i+j],
		     t3Font->cacheData + (i+j) * t3Font->glyphSize);
        return gTrue;
      }
    }
  }

  // push a new Type 3 glyph record
  t3gs = new T3GlyphStack();
  t3gs->next = t3GlyphStack;
  t3GlyphStack = t3gs;
  t3GlyphStack->code = code;
  t3GlyphStack->cache = t3Font;
  t3GlyphStack->cacheTag = NULL;
  t3GlyphStack->cacheData = NULL;

  return gFalse;
}

void SplashOutputDev::endType3Char(GfxState *state) {
  T3GlyphStack *t3gs;
  double *ctm;

  if (t3GlyphStack->cacheTag) {
    memcpy(t3GlyphStack->cacheData, bitmap->getDataPtr(),
	   t3GlyphStack->cache->glyphSize);
    delete bitmap;
    delete splash;
    bitmap = t3GlyphStack->origBitmap;
    splash = t3GlyphStack->origSplash;
    ctm = state->getCTM();
    state->setCTM(ctm[0], ctm[1], ctm[2], ctm[3],
		  t3GlyphStack->origCTM4, t3GlyphStack->origCTM5);
    updateCTM(state, 0, 0, 0, 0, 0, 0);
    drawType3Glyph(t3GlyphStack->cache,
		   t3GlyphStack->cacheTag, t3GlyphStack->cacheData);
  }
  t3gs = t3GlyphStack;
  t3GlyphStack = t3gs->next;
  delete t3gs;
}

void SplashOutputDev::type3D0(GfxState *state, double wx, double wy) {
}

void SplashOutputDev::type3D1(GfxState *state, double wx, double wy,
			      double llx, double lly, double urx, double ury) {
  double *ctm;
  T3FontCache *t3Font;
  SplashColor color;
  double xt, yt, xMin, xMax, yMin, yMax, x1, y1;
  int i, j;

  t3Font = t3GlyphStack->cache;

  // check for a valid bbox
  state->transform(0, 0, &xt, &yt);
  state->transform(llx, lly, &x1, &y1);
  xMin = xMax = x1;
  yMin = yMax = y1;
  state->transform(llx, ury, &x1, &y1);
  if (x1 < xMin) {
    xMin = x1;
  } else if (x1 > xMax) {
    xMax = x1;
  }
  if (y1 < yMin) {
    yMin = y1;
  } else if (y1 > yMax) {
    yMax = y1;
  }
  state->transform(urx, lly, &x1, &y1);
  if (x1 < xMin) {
    xMin = x1;
  } else if (x1 > xMax) {
    xMax = x1;
  }
  if (y1 < yMin) {
    yMin = y1;
  } else if (y1 > yMax) {
    yMax = y1;
  }
  state->transform(urx, ury, &x1, &y1);
  if (x1 < xMin) {
    xMin = x1;
  } else if (x1 > xMax) {
    xMax = x1;
  }
  if (y1 < yMin) {
    yMin = y1;
  } else if (y1 > yMax) {
    yMax = y1;
  }
  if (xMin - xt < t3Font->glyphX ||
      yMin - yt < t3Font->glyphY ||
      xMax - xt > t3Font->glyphX + t3Font->glyphW ||
      yMax - yt > t3Font->glyphY + t3Font->glyphH) {
    if (t3Font->validBBox) {
      error(-1, "Bad bounding box in Type 3 glyph");
    }
    return;
  }

  if (t3Font->cacheTags == NULL)
    return;

  // allocate a cache entry
  i = (t3GlyphStack->code & (t3Font->cacheSets - 1)) * t3Font->cacheAssoc;
  for (j = 0; j < t3Font->cacheAssoc; ++j) {
    if ((t3Font->cacheTags[i+j].mru & 0x7fff) == t3Font->cacheAssoc - 1) {
      t3Font->cacheTags[i+j].mru = 0x8000;
      t3Font->cacheTags[i+j].code = t3GlyphStack->code;
      t3GlyphStack->cacheTag = &t3Font->cacheTags[i+j];
      t3GlyphStack->cacheData = t3Font->cacheData + (i+j) * t3Font->glyphSize;
    } else {
      ++t3Font->cacheTags[i+j].mru;
    }
  }

  // save state
  t3GlyphStack->origBitmap = bitmap;
  t3GlyphStack->origSplash = splash;
  ctm = state->getCTM();
  t3GlyphStack->origCTM4 = ctm[4];
  t3GlyphStack->origCTM5 = ctm[5];

  // create the temporary bitmap
  if (colorMode == splashModeMono1) {
    bitmap = new SplashBitmap(t3Font->glyphW, t3Font->glyphH, 1,
			      splashModeMono1, gFalse);
    splash = new Splash(bitmap, gFalse,
			t3GlyphStack->origSplash->getScreen());
    color[0] = 0;
    splash->clear(color);
    color[0] = 1;
  } else {
    bitmap = new SplashBitmap(t3Font->glyphW, t3Font->glyphH, 1,
			      splashModeMono8, gFalse);
    splash = new Splash(bitmap, vectorAntialias,
			t3GlyphStack->origSplash->getScreen());
    color[0] = 0x00;
    splash->clear(color);
    color[0] = 0xff;
  }
  splash->setFillPattern(new SplashSolidColor(color));
  splash->setStrokePattern(new SplashSolidColor(color));
  //~ this should copy other state from t3GlyphStack->origSplash?
  state->setCTM(ctm[0], ctm[1], ctm[2], ctm[3],
		-t3Font->glyphX, -t3Font->glyphY);
  updateCTM(state, 0, 0, 0, 0, 0, 0);
}

void SplashOutputDev::drawType3Glyph(T3FontCache *t3Font,
				     T3FontCacheTag * /*tag*/, Guchar *data) {
  SplashGlyphBitmap glyph;

  glyph.x = -t3Font->glyphX;
  glyph.y = -t3Font->glyphY;
  glyph.w = t3Font->glyphW;
  glyph.h = t3Font->glyphH;
  glyph.aa = colorMode != splashModeMono1;
  glyph.data = data;
  glyph.freeData = gFalse;
  splash->fillGlyph(0, 0, &glyph);
}

void SplashOutputDev::endTextObject(GfxState *state) {
  if (textClipPath) {
    splash->clipToPath(textClipPath, gFalse);
    delete textClipPath;
    textClipPath = NULL;
  }
}

struct SplashOutImageMaskData {
  ImageStream *imgStr;
  GBool invert;
  int width, height, y;
};

GBool SplashOutputDev::imageMaskSrc(void *data, SplashColorPtr line) {
  SplashOutImageMaskData *imgMaskData = (SplashOutImageMaskData *)data;
  Guchar *p;
  SplashColorPtr q;
  int x;

  if (imgMaskData->y == imgMaskData->height) {
    return gFalse;
  }
  for (x = 0, p = imgMaskData->imgStr->getLine(), q = line;
       x < imgMaskData->width;
       ++x) {
    *q++ = *p++ ^ imgMaskData->invert;
  }
  ++imgMaskData->y;
  return gTrue;
}

void SplashOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
				    int width, int height, GBool invert,
				    GBool inlineImg) {
  double *ctm;
  SplashCoord mat[6];
  SplashOutImageMaskData imgMaskData;

  if (state->getFillColorSpace()->isNonMarking()) {
    return;
  }

  ctm = state->getCTM();
  mat[0] = ctm[0];
  mat[1] = ctm[1];
  mat[2] = -ctm[2];
  mat[3] = -ctm[3];
  mat[4] = ctm[2] + ctm[4];
  mat[5] = ctm[3] + ctm[5];

  imgMaskData.imgStr = new ImageStream(str, width, 1, 1);
  imgMaskData.imgStr->reset();
  imgMaskData.invert = invert ? 0 : 1;
  imgMaskData.width = width;
  imgMaskData.height = height;
  imgMaskData.y = 0;

  splash->fillImageMask(&imageMaskSrc, &imgMaskData, width, height, mat,
			t3GlyphStack != NULL);
  if (inlineImg) {
    while (imgMaskData.y < height) {
      imgMaskData.imgStr->getLine();
      ++imgMaskData.y;
    }
  }

  delete imgMaskData.imgStr;
  str->close();
}

struct SplashOutImageData {
  ImageStream *imgStr;
  GfxImageColorMap *colorMap;
  SplashColorPtr lookup;
  int *maskColors;
  SplashColorMode colorMode;
  int width, height, y;
};

GBool SplashOutputDev::imageSrc(void *data, SplashColorPtr colorLine,
				Guchar * /*alphaLine*/) {
  SplashOutImageData *imgData = (SplashOutImageData *)data;
  Guchar *p;
  SplashColorPtr q, col;
  GfxRGB rgb;
  GfxGray gray;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  int nComps, x;

  if (imgData->y == imgData->height) {
    return gFalse;
  }

  nComps = imgData->colorMap->getNumPixelComps();

  if (imgData->lookup) {
    switch (imgData->colorMode) {
  case splashModeMono1:
  case splashModeMono8:
      for (x = 0, p = imgData->imgStr->getLine(), q = colorLine;
	   x < imgData->width;
	   ++x, ++p) {
	*q++ = imgData->lookup[*p];
      }
    break;
  case splashModeRGB8:
  case splashModeBGR8:
      for (x = 0, p = imgData->imgStr->getLine(), q = colorLine;
	   x < imgData->width;
	   ++x, ++p) {
	col = &imgData->lookup[3 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
      }
    break;
  case splashModeXBGR8:
      for (x = 0, p = imgData->imgStr->getLine(), q = colorLine;
	   x < imgData->width;
	   ++x, ++p) {
	col = &imgData->lookup[4 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*q++ = col[3];
      }
      break;
#if SPLASH_CMYK
    case splashModeCMYK8:
      for (x = 0, p = imgData->imgStr->getLine(), q = colorLine;
	   x < imgData->width;
	   ++x, ++p) {
	col = &imgData->lookup[4 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*q++ = col[3];
      }
      break;
#endif
  }
  } else {
    switch (imgData->colorMode) {
    case splashModeMono1:
    case splashModeMono8:
      for (x = 0, p = imgData->imgStr->getLine(), q = colorLine;
	   x < imgData->width;
	   ++x, p += nComps) {
	imgData->colorMap->getGray(p, &gray);
	*q++ = colToByte(gray);
      }
	break;
	case splashModeXBGR8:
    case splashModeRGB8:
    case splashModeBGR8:
      for (x = 0, p = imgData->imgStr->getLine(), q = colorLine;
	   x < imgData->width;
	   ++x, p += nComps) {
	imgData->colorMap->getRGB(p, &rgb);
	*q++ = colToByte(rgb.r);
	*q++ = colToByte(rgb.g);
	*q++ = colToByte(rgb.b);
	if (imgData->colorMode == splashModeXBGR8) *q++ = 255;
      }
      break;
#if SPLASH_CMYK
    case splashModeCMYK8:
      for (x = 0, p = imgData->imgStr->getLine(), q = colorLine;
	   x < imgData->width;
	   ++x, p += nComps) {
	imgData->colorMap->getCMYK(p, &cmyk);
	*q++ = colToByte(cmyk.c);
	*q++ = colToByte(cmyk.m);
	*q++ = colToByte(cmyk.y);
	*q++ = colToByte(cmyk.k);
      }
      break;
#endif
    }
  }

  ++imgData->y;
  return gTrue;
}

GBool SplashOutputDev::alphaImageSrc(void *data, SplashColorPtr colorLine,
				     Guchar *alphaLine) {
  SplashOutImageData *imgData = (SplashOutImageData *)data;
  Guchar *p, *aq;
  SplashColorPtr q, col;
  GfxRGB rgb;
  GfxGray gray;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  Guchar alpha;
  int nComps, x, i;

  if (imgData->y == imgData->height) {
    return gFalse;
  }

  nComps = imgData->colorMap->getNumPixelComps();

  for (x = 0, p = imgData->imgStr->getLine(), q = colorLine, aq = alphaLine;
       x < imgData->width;
       ++x, p += nComps) {
    alpha = 0;
    for (i = 0; i < nComps; ++i) {
      if (p[i] < imgData->maskColors[2*i] ||
	  p[i] > imgData->maskColors[2*i+1]) {
	alpha = 0xff;
	break;
      }
    }
    if (imgData->lookup) {
      switch (imgData->colorMode) {
      case splashModeMono1:
      case splashModeMono8:
	*q++ = imgData->lookup[*p];
	*aq++ = alpha;
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	col = &imgData->lookup[3 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*aq++ = alpha;
	break;
      case splashModeXBGR8:
	col = &imgData->lookup[4 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*q++ = 255;
	*aq++ = alpha;
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	col = &imgData->lookup[4 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*q++ = col[3];
	*aq++ = alpha;
	break;
#endif
      }
    } else {
      switch (imgData->colorMode) {
      case splashModeMono1:
      case splashModeMono8:
	imgData->colorMap->getGray(p, &gray);
	*q++ = colToByte(gray);
	*aq++ = alpha;
	break;
      case splashModeXBGR8:
      case splashModeRGB8:
      case splashModeBGR8:
	imgData->colorMap->getRGB(p, &rgb);
	*q++ = colToByte(rgb.r);
	*q++ = colToByte(rgb.g);
	*q++ = colToByte(rgb.b);
	if (imgData->colorMode == splashModeXBGR8) *q++ = 255;
	*aq++ = alpha;
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	imgData->colorMap->getCMYK(p, &cmyk);
	*q++ = colToByte(cmyk.c);
	*q++ = colToByte(cmyk.m);
	*q++ = colToByte(cmyk.y);
	*q++ = colToByte(cmyk.k);
	*aq++ = alpha;
	break;
#endif
      }
    }
  }

  ++imgData->y;
  return gTrue;
}

void SplashOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
				int width, int height,
				GfxImageColorMap *colorMap,
				int *maskColors, GBool inlineImg) {
  double *ctm;
  SplashCoord mat[6];
  SplashOutImageData imgData;
  SplashColorMode srcMode;
  SplashImageSource src;
  GfxGray gray;
  GfxRGB rgb;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  Guchar pix;
  int n, i;

  ctm = state->getCTM();
  mat[0] = ctm[0];
  mat[1] = ctm[1];
  mat[2] = -ctm[2];
  mat[3] = -ctm[3];
  mat[4] = ctm[2] + ctm[4];
  mat[5] = ctm[3] + ctm[5];

  imgData.imgStr = new ImageStream(str, width,
				   colorMap->getNumPixelComps(),
				   colorMap->getBits());
  imgData.imgStr->reset();
  imgData.colorMap = colorMap;
  imgData.maskColors = maskColors;
  imgData.colorMode = colorMode;
  imgData.width = width;
  imgData.height = height;
  imgData.y = 0;

  // special case for one-channel (monochrome/gray/separation) images:
  // build a lookup table here
  imgData.lookup = NULL;
  if (colorMap->getNumPixelComps() == 1) {
    n = 1 << colorMap->getBits();
    switch (colorMode) {
    case splashModeMono1:
    case splashModeMono8:
      imgData.lookup = (SplashColorPtr)gmalloc(n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getGray(&pix, &gray);
	imgData.lookup[i] = colToByte(gray);
      }
      break;
    case splashModeRGB8:
    case splashModeBGR8:
      imgData.lookup = (SplashColorPtr)gmalloc(3 * n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getRGB(&pix, &rgb);
	imgData.lookup[3*i] = colToByte(rgb.r);
	imgData.lookup[3*i+1] = colToByte(rgb.g);
	imgData.lookup[3*i+2] = colToByte(rgb.b);
      }
      break;
    case splashModeXBGR8:
      imgData.lookup = (SplashColorPtr)gmalloc(4 * n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getRGB(&pix, &rgb);
	imgData.lookup[4*i] = colToByte(rgb.r);
	imgData.lookup[4*i+1] = colToByte(rgb.g);
	imgData.lookup[4*i+2] = colToByte(rgb.b);
	imgData.lookup[4*i+3] = 255;
      }
      break;
#if SPLASH_CMYK
    case splashModeCMYK8:
      imgData.lookup = (SplashColorPtr)gmalloc(4 * n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getCMYK(&pix, &cmyk);
	imgData.lookup[4*i] = colToByte(cmyk.c);
	imgData.lookup[4*i+1] = colToByte(cmyk.m);
	imgData.lookup[4*i+2] = colToByte(cmyk.y);
	imgData.lookup[4*i+3] = colToByte(cmyk.k);
      }
      break;
#endif
      break;
    }
  }

  if (colorMode == splashModeMono1) {
    srcMode = splashModeMono8;
  } else {
    srcMode = colorMode;
  }
  src = maskColors ? &alphaImageSrc : &imageSrc;
  splash->drawImage(src, &imgData, srcMode, maskColors ? gTrue : gFalse,
		    width, height, mat);
  if (inlineImg) {
    while (imgData.y < height) {
      imgData.imgStr->getLine();
      ++imgData.y;
    }
  }

  gfree(imgData.lookup);
  delete imgData.imgStr;
  str->close();
}

struct SplashOutMaskedImageData {
  ImageStream *imgStr;
  GfxImageColorMap *colorMap;
  SplashBitmap *mask;
  SplashColorPtr lookup;
  SplashColorMode colorMode;
  int width, height, y;
};

GBool SplashOutputDev::maskedImageSrc(void *data, SplashColorPtr colorLine,
				      Guchar *alphaLine) {
  SplashOutMaskedImageData *imgData = (SplashOutMaskedImageData *)data;
  Guchar *p, *aq;
  SplashColor maskColor;
  SplashColorPtr q, col;
  GfxRGB rgb;
  GfxGray gray;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  Guchar alpha;
  int nComps, x;

  if (imgData->y == imgData->height) {
    return gFalse;
  }

  nComps = imgData->colorMap->getNumPixelComps();

  for (x = 0, p = imgData->imgStr->getLine(), q = colorLine, aq = alphaLine;
       x < imgData->width;
       ++x, p += nComps) {
    imgData->mask->getPixel(x, imgData->y, maskColor);
    alpha = maskColor[0] ? 0xff : 0x00;
    if (imgData->lookup) {
      switch (imgData->colorMode) {
      case splashModeMono1:
      case splashModeMono8:
	*q++ = imgData->lookup[*p];
	*aq++ = alpha;
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	col = &imgData->lookup[3 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*aq++ = alpha;
	break;
      case splashModeXBGR8:
	col = &imgData->lookup[4 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*q++ = 255;
	*aq++ = alpha;
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	col = &imgData->lookup[4 * *p];
	*q++ = col[0];
	*q++ = col[1];
	*q++ = col[2];
	*q++ = col[3];
	*aq++ = alpha;
	break;
#endif
      }
    } else {
      switch (imgData->colorMode) {
      case splashModeMono1:
      case splashModeMono8:
	imgData->colorMap->getGray(p, &gray);
	*q++ = colToByte(gray);
	*aq++ = alpha;
	break;
      case splashModeXBGR8:
      case splashModeRGB8:
      case splashModeBGR8:
	imgData->colorMap->getRGB(p, &rgb);
	*q++ = colToByte(rgb.r);
	*q++ = colToByte(rgb.g);
	*q++ = colToByte(rgb.b);
	if (imgData->colorMode == splashModeXBGR8) *q++ = 255;
	*aq++ = alpha;
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	imgData->colorMap->getCMYK(p, &cmyk);
	*q++ = colToByte(cmyk.c);
	*q++ = colToByte(cmyk.m);
	*q++ = colToByte(cmyk.y);
	*q++ = colToByte(cmyk.k);
	*aq++ = alpha;
	break;
#endif
      }
    }
  }

  ++imgData->y;
  return gTrue;
}

void SplashOutputDev::drawMaskedImage(GfxState *state, Object *ref,
				      Stream *str, int width, int height,
				      GfxImageColorMap *colorMap,
				      Stream *maskStr, int maskWidth,
				      int maskHeight, GBool maskInvert) {
  GfxImageColorMap *maskColorMap;
  Object maskDecode, decodeLow, decodeHigh;
  double *ctm;
  SplashCoord mat[6];
  SplashOutMaskedImageData imgData;
  SplashOutImageMaskData imgMaskData;
  SplashColorMode srcMode;
  SplashBitmap *maskBitmap;
  Splash *maskSplash;
  SplashColor maskColor;
  GfxGray gray;
  GfxRGB rgb;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  Guchar pix;
  int n, i;

  // If the mask is higher resolution than the image, use
  // drawSoftMaskedImage() instead.
  if (maskWidth > width || maskHeight > height) {
    decodeLow.initInt(maskInvert ? 0 : 1);
    decodeHigh.initInt(maskInvert ? 1 : 0);
    maskDecode.initArray(xref);
    maskDecode.arrayAdd(&decodeLow);
    maskDecode.arrayAdd(&decodeHigh);
    maskColorMap = new GfxImageColorMap(1, &maskDecode,
					new GfxDeviceGrayColorSpace());
    maskDecode.free();
    drawSoftMaskedImage(state, ref, str, width, height, colorMap,
			maskStr, maskWidth, maskHeight, maskColorMap);
    delete maskColorMap;

  } else {

    //----- scale the mask image to the same size as the source image

    mat[0] = (SplashCoord)width;
    mat[1] = 0;
    mat[2] = 0;
    mat[3] = (SplashCoord)height;
    mat[4] = 0;
    mat[5] = 0;
    imgMaskData.imgStr = new ImageStream(maskStr, maskWidth, 1, 1);
    imgMaskData.imgStr->reset();
    imgMaskData.invert = maskInvert ? 0 : 1;
    imgMaskData.width = maskWidth;
    imgMaskData.height = maskHeight;
    imgMaskData.y = 0;
    maskBitmap = new SplashBitmap(width, height, 1, splashModeMono1, gFalse);
    maskSplash = new Splash(maskBitmap, gFalse);
    maskColor[0] = 0;
    maskSplash->clear(maskColor);
    maskColor[0] = 0xff;
    maskSplash->setFillPattern(new SplashSolidColor(maskColor));
    maskSplash->fillImageMask(&imageMaskSrc, &imgMaskData,
			      maskWidth, maskHeight, mat, gFalse);
    delete imgMaskData.imgStr;
    maskStr->close();
    delete maskSplash;

    //----- draw the source image

    ctm = state->getCTM();
    mat[0] = ctm[0];
    mat[1] = ctm[1];
    mat[2] = -ctm[2];
    mat[3] = -ctm[3];
    mat[4] = ctm[2] + ctm[4];
    mat[5] = ctm[3] + ctm[5];

    imgData.imgStr = new ImageStream(str, width,
				     colorMap->getNumPixelComps(),
				     colorMap->getBits());
    imgData.imgStr->reset();
    imgData.colorMap = colorMap;
    imgData.mask = maskBitmap;
    imgData.colorMode = colorMode;
    imgData.width = width;
    imgData.height = height;
    imgData.y = 0;

    // special case for one-channel (monochrome/gray/separation) images:
    // build a lookup table here
    imgData.lookup = NULL;
    if (colorMap->getNumPixelComps() == 1) {
      n = 1 << colorMap->getBits();
      switch (colorMode) {
      case splashModeMono1:
      case splashModeMono8:
	imgData.lookup = (SplashColorPtr)gmalloc(n);
	for (i = 0; i < n; ++i) {
	  pix = (Guchar)i;
	  colorMap->getGray(&pix, &gray);
	  imgData.lookup[i] = colToByte(gray);
	}
	break;
      case splashModeRGB8:
      case splashModeBGR8:
	imgData.lookup = (SplashColorPtr)gmalloc(3 * n);
	for (i = 0; i < n; ++i) {
	  pix = (Guchar)i;
	  colorMap->getRGB(&pix, &rgb);
	  imgData.lookup[3*i] = colToByte(rgb.r);
	  imgData.lookup[3*i+1] = colToByte(rgb.g);
	  imgData.lookup[3*i+2] = colToByte(rgb.b);
	}
	break;
      case splashModeXBGR8:
	imgData.lookup = (SplashColorPtr)gmalloc(4 * n);
	for (i = 0; i < n; ++i) {
	  pix = (Guchar)i;
	  colorMap->getRGB(&pix, &rgb);
	  imgData.lookup[4*i] = colToByte(rgb.r);
	  imgData.lookup[4*i+1] = colToByte(rgb.g);
	  imgData.lookup[4*i+2] = colToByte(rgb.b);
	  imgData.lookup[4*i+3] = 255;
	}
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	imgData.lookup = (SplashColorPtr)gmalloc(4 * n);
	for (i = 0; i < n; ++i) {
	  pix = (Guchar)i;
	  colorMap->getCMYK(&pix, &cmyk);
	  imgData.lookup[4*i] = colToByte(cmyk.c);
	  imgData.lookup[4*i+1] = colToByte(cmyk.m);
	  imgData.lookup[4*i+2] = colToByte(cmyk.y);
	  imgData.lookup[4*i+3] = colToByte(cmyk.k);
	}
	break;
#endif
      }
    }

    if (colorMode == splashModeMono1) {
      srcMode = splashModeMono8;
    } else {
      srcMode = colorMode;
    }
    splash->drawImage(&maskedImageSrc, &imgData, srcMode, gTrue,
		      width, height, mat);

    delete maskBitmap;
    gfree(imgData.lookup);
    delete imgData.imgStr;
    str->close();
  }
}

void SplashOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref,
					  Stream *str, int width, int height,
					  GfxImageColorMap *colorMap,
					  Stream *maskStr,
					  int maskWidth, int maskHeight,
					  GfxImageColorMap *maskColorMap) {
  double *ctm;
  SplashCoord mat[6];
  SplashOutImageData imgData;
  SplashOutImageData imgMaskData;
  SplashColorMode srcMode;
  SplashBitmap *maskBitmap;
  Splash *maskSplash;
  SplashColor maskColor;
  GfxGray gray;
  GfxRGB rgb;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  Guchar pix;
  int n, i;

  ctm = state->getCTM();
  mat[0] = ctm[0];
  mat[1] = ctm[1];
  mat[2] = -ctm[2];
  mat[3] = -ctm[3];
  mat[4] = ctm[2] + ctm[4];
  mat[5] = ctm[3] + ctm[5];

  //----- set up the soft mask

  imgMaskData.imgStr = new ImageStream(maskStr, maskWidth,
				       maskColorMap->getNumPixelComps(),
				       maskColorMap->getBits());
  imgMaskData.imgStr->reset();
  imgMaskData.colorMap = maskColorMap;
  imgMaskData.maskColors = NULL;
  imgMaskData.colorMode = splashModeMono8;
  imgMaskData.width = maskWidth;
  imgMaskData.height = maskHeight;
  imgMaskData.y = 0;
  n = 1 << maskColorMap->getBits();
  imgMaskData.lookup = (SplashColorPtr)gmalloc(n);
  for (i = 0; i < n; ++i) {
    pix = (Guchar)i;
    maskColorMap->getGray(&pix, &gray);
    imgMaskData.lookup[i] = colToByte(gray);
  }
  maskBitmap = new SplashBitmap(bitmap->getWidth(), bitmap->getHeight(),
				1, splashModeMono8, gFalse);
  maskSplash = new Splash(maskBitmap, vectorAntialias);
  maskColor[0] = 0;
  maskSplash->clear(maskColor);
  maskSplash->drawImage(&imageSrc, &imgMaskData, splashModeMono8, gFalse,
			maskWidth, maskHeight, mat);
  delete imgMaskData.imgStr;
  maskStr->close();
  gfree(imgMaskData.lookup);
  delete maskSplash;
  splash->setSoftMask(maskBitmap);

  //----- draw the source image

  imgData.imgStr = new ImageStream(str, width,
				   colorMap->getNumPixelComps(),
				   colorMap->getBits());
  imgData.imgStr->reset();
  imgData.colorMap = colorMap;
  imgData.maskColors = NULL;
  imgData.colorMode = colorMode;
  imgData.width = width;
  imgData.height = height;
  imgData.y = 0;

  // special case for one-channel (monochrome/gray/separation) images:
  // build a lookup table here
  imgData.lookup = NULL;
  if (colorMap->getNumPixelComps() == 1) {
    n = 1 << colorMap->getBits();
    switch (colorMode) {
    case splashModeMono1:
    case splashModeMono8:
      imgData.lookup = (SplashColorPtr)gmalloc(n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getGray(&pix, &gray);
	imgData.lookup[i] = colToByte(gray);
      }
      break;
    case splashModeRGB8:
    case splashModeBGR8:
      imgData.lookup = (SplashColorPtr)gmalloc(3 * n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getRGB(&pix, &rgb);
	imgData.lookup[3*i] = colToByte(rgb.r);
	imgData.lookup[3*i+1] = colToByte(rgb.g);
	imgData.lookup[3*i+2] = colToByte(rgb.b);
      }
      break;
    case splashModeXBGR8:
      imgData.lookup = (SplashColorPtr)gmalloc(4 * n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getRGB(&pix, &rgb);
	imgData.lookup[4*i] = colToByte(rgb.r);
	imgData.lookup[4*i+1] = colToByte(rgb.g);
	imgData.lookup[4*i+2] = colToByte(rgb.b);
	imgData.lookup[4*i+3] = 255;
      }
      break;
#if SPLASH_CMYK
    case splashModeCMYK8:
      imgData.lookup = (SplashColorPtr)gmalloc(4 * n);
      for (i = 0; i < n; ++i) {
	pix = (Guchar)i;
	colorMap->getCMYK(&pix, &cmyk);
	imgData.lookup[4*i] = colToByte(cmyk.c);
	imgData.lookup[4*i+1] = colToByte(cmyk.m);
	imgData.lookup[4*i+2] = colToByte(cmyk.y);
	imgData.lookup[4*i+3] = colToByte(cmyk.k);
      }
      break;
#endif
    }
  }

  if (colorMode == splashModeMono1) {
    srcMode = splashModeMono8;
  } else {
    srcMode = colorMode;
  }
  splash->drawImage(&imageSrc, &imgData, srcMode, gFalse, width, height, mat);

  splash->setSoftMask(NULL);
  gfree(imgData.lookup);
  delete imgData.imgStr;
  str->close();
}

void SplashOutputDev::beginTransparencyGroup(GfxState *state, double *bbox,
					     GfxColorSpace *blendingColorSpace,
					     GBool isolated, GBool /*knockout*/,
					     GBool /*forSoftMask*/) {
  SplashTransparencyGroup *transpGroup;
  SplashColor color;
  double xMin, yMin, xMax, yMax, x, y;
  int tx, ty, w, h;

  // transform the bbox
  state->transform(bbox[0], bbox[1], &x, &y);
  xMin = xMax = x;
  yMin = yMax = y;
  state->transform(bbox[0], bbox[3], &x, &y);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  state->transform(bbox[2], bbox[1], &x, &y);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  state->transform(bbox[2], bbox[3], &x, &y);
  if (x < xMin) {
    xMin = x;
  } else if (x > xMax) {
    xMax = x;
  }
  if (y < yMin) {
    yMin = y;
  } else if (y > yMax) {
    yMax = y;
  }
  tx = (int)floor(xMin);
  if (tx < 0) {
    tx = 0;
  } else if (tx > bitmap->getWidth()) {
    tx = bitmap->getWidth();
  }
  ty = (int)floor(yMin);
  if (ty < 0) {
    ty = 0;
  } else if (ty > bitmap->getHeight()) {
    ty = bitmap->getHeight();
  }
  w = (int)ceil(xMax) - tx + 1;
  if (tx + w > bitmap->getWidth()) {
    w = bitmap->getWidth() - tx;
  }
  if (w < 1) {
    w = 1;
  }
  h = (int)ceil(yMax) - ty + 1;
  if (ty + h > bitmap->getHeight()) {
    h = bitmap->getHeight() - ty;
  }
  if (h < 1) {
    h = 1;
  }

  // push a new stack entry
  transpGroup = new SplashTransparencyGroup();
  transpGroup->tx = tx;
  transpGroup->ty = ty;
  transpGroup->blendingColorSpace = blendingColorSpace;
  transpGroup->isolated = isolated;
  transpGroup->next = transpGroupStack;
  transpGroupStack = transpGroup;

  // save state
  transpGroup->origBitmap = bitmap;
  transpGroup->origSplash = splash;

  //~ this ignores the blendingColorSpace arg

  // create the temporary bitmap
  bitmap = new SplashBitmap(w, h, bitmapRowPad, colorMode, gTrue,
			    bitmapTopDown); 
  splash = new Splash(bitmap, vectorAntialias,
		      transpGroup->origSplash->getScreen());
  if (isolated) {
    switch (colorMode) {
    case splashModeMono1:
    case splashModeMono8:
      color[0] = 0;
      break;
    case splashModeXBGR8:
      color[3] = 255;
    case splashModeRGB8:
    case splashModeBGR8:
      color[0] = color[1] = color[2] = 0;
      break;
#if SPLASH_CMYK
    case splashModeCMYK8:
      color[0] = color[1] = color[2] = color[3] = 0;
      break;
#endif
    default:
      // make gcc happy
      break;
    }
    splash->clear(color, 0);
  } else {
    splash->blitTransparent(transpGroup->origBitmap, tx, ty, 0, 0, w, h);
    splash->setInNonIsolatedGroup(transpGroup->origBitmap, tx, ty);
  }
  transpGroup->tBitmap = bitmap;
  state->shiftCTM(-tx, -ty);
  updateCTM(state, 0, 0, 0, 0, 0, 0);
}

void SplashOutputDev::endTransparencyGroup(GfxState *state) {
  double *ctm;

  // restore state
  delete splash;
  bitmap = transpGroupStack->origBitmap;
  splash = transpGroupStack->origSplash;
  ctm = state->getCTM();
  state->shiftCTM(transpGroupStack->tx, transpGroupStack->ty);
  updateCTM(state, 0, 0, 0, 0, 0, 0);
}

void SplashOutputDev::paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/) {
  SplashBitmap *tBitmap;
  SplashTransparencyGroup *transpGroup;
  GBool isolated;
  int tx, ty;

  tx = transpGroupStack->tx;
  ty = transpGroupStack->ty;
  tBitmap = transpGroupStack->tBitmap;
  isolated = transpGroupStack->isolated;

  // paint the transparency group onto the parent bitmap
  // - the clip path was set in the parent's state)
  splash->composite(tBitmap, 0, 0, tx, ty,
		    tBitmap->getWidth(), tBitmap->getHeight(),
		    gFalse, !isolated);

  // pop the stack
  transpGroup = transpGroupStack;
  transpGroupStack = transpGroup->next;
  delete transpGroup;

  delete tBitmap;
}

void SplashOutputDev::setSoftMask(GfxState * /*state*/, double * /*bbox*/,
				  GBool alpha, Function *transferFunc,
				  GfxColor *backdropColor) {
  SplashBitmap *softMask, *tBitmap;
  Splash *tSplash;
  SplashTransparencyGroup *transpGroup;
  SplashColor color;
  SplashColorPtr p;
  GfxGray gray;
  GfxRGB rgb;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif
  double lum, lum2;
  int tx, ty, x, y;

  tx = transpGroupStack->tx;
  ty = transpGroupStack->ty;
  tBitmap = transpGroupStack->tBitmap;

  // composite with backdrop color
  if (!alpha && colorMode != splashModeMono1) {
    //~ need to correctly handle the case where no blending color
    //~ space is given
    if (transpGroupStack->blendingColorSpace) {
      tSplash = new Splash(tBitmap, vectorAntialias,
			   transpGroupStack->origSplash->getScreen());
      switch (colorMode) {
      case splashModeMono1:
	// transparency is not supported in mono1 mode
	break;
      case splashModeMono8:
	transpGroupStack->blendingColorSpace->getGray(backdropColor, &gray);
	color[0] = colToByte(gray);
	tSplash->compositeBackground(color);
	break;
      case splashModeXBGR8:
	color[3] = 255;
      case splashModeRGB8:
      case splashModeBGR8:
	transpGroupStack->blendingColorSpace->getRGB(backdropColor, &rgb);
	color[0] = colToByte(rgb.r);
	color[1] = colToByte(rgb.g);
	color[2] = colToByte(rgb.b);
	tSplash->compositeBackground(color);
	break;
#if SPLASH_CMYK
      case splashModeCMYK8:
	transpGroupStack->blendingColorSpace->getCMYK(backdropColor, &cmyk);
	color[0] = colToByte(cmyk.c);
	color[1] = colToByte(cmyk.m);
	color[2] = colToByte(cmyk.y);
	color[3] = colToByte(cmyk.k);
	tSplash->compositeBackground(color);
	break;
#endif
      }
      delete tSplash;
    }
  }

  softMask = new SplashBitmap(bitmap->getWidth(), bitmap->getHeight(),
			      1, splashModeMono8, gFalse);
  memset(softMask->getDataPtr(), 0,
	 softMask->getRowSize() * softMask->getHeight());
  p = softMask->getDataPtr() + ty * softMask->getRowSize() + tx;
  int xMax = tBitmap->getWidth();
  int yMax = tBitmap->getHeight();
  if (xMax + tx > bitmap->getWidth()) xMax = bitmap->getWidth() - tx;
  if (yMax + ty > bitmap->getHeight()) yMax = bitmap->getHeight() - ty;
  for (y = 0; y < yMax; ++y) {
    for (x = 0; x < xMax; ++x) {
      tBitmap->getPixel(x, y, color);
      if (alpha) {
	//~ unimplemented
      } else {
	// convert to luminosity
	switch (colorMode) {
	case splashModeMono1:
	case splashModeMono8:
	  lum = color[0] / 255.0;
	  break;
	case splashModeXBGR8:
	case splashModeRGB8:
	case splashModeBGR8:
	  lum = (0.3 / 255.0) * color[0] +
	        (0.59 / 255.0) * color[1] +
	        (0.11 / 255.0) * color[2];
	  break;
#if SPLASH_CMYK
	case splashModeCMYK8:
	  lum = (1 - color[4] / 255.0)
	        - (0.3 / 255.0) * color[0]
	        - (0.59 / 255.0) * color[1]
	        - (0.11 / 255.0) * color[2];
	  if (lum < 0) {
	    lum = 0;
	  }
	  break;
#endif
	}
	if (transferFunc) {
	  transferFunc->transform(&lum, &lum2);
	} else {
	  lum2 = lum;
	}
	p[x] = (int)(lum2 * 255.0 + 0.5);
      }
    }
    p += softMask->getRowSize();
  }
  splash->setSoftMask(softMask);

  // pop the stack
  transpGroup = transpGroupStack;
  transpGroupStack = transpGroup->next;
  delete transpGroup;

  delete tBitmap;
}

void SplashOutputDev::clearSoftMask(GfxState * /*state*/) {
  splash->setSoftMask(NULL);
}

void SplashOutputDev::setPaperColor(SplashColorPtr paperColorA) {
  splashColorCopy(paperColor, paperColorA);
}

int SplashOutputDev::getBitmapWidth() {
  return bitmap->getWidth();
}

int SplashOutputDev::getBitmapHeight() {
  return bitmap->getHeight();
}

SplashBitmap *SplashOutputDev::takeBitmap() {
  SplashBitmap *ret;

  ret = bitmap;
  bitmap = new SplashBitmap(1, 1, bitmapRowPad, colorMode,
			    colorMode != splashModeMono1, bitmapTopDown);
  return ret;
}

void SplashOutputDev::getModRegion(int *xMin, int *yMin,
				   int *xMax, int *yMax) {
  splash->getModRegion(xMin, yMin, xMax, yMax);
}

void SplashOutputDev::clearModRegion() {
  splash->clearModRegion();
}

void SplashOutputDev::setFillColor(int r, int g, int b) {
  GfxRGB rgb;
  GfxGray gray;
#if SPLASH_CMYK
  GfxCMYK cmyk;
#endif

  rgb.r = byteToCol(r);
  rgb.g = byteToCol(g);
  rgb.b = byteToCol(b);
  gray = (GfxColorComp)(0.299 * rgb.r + 0.587 * rgb.g + 0.114 * rgb.b + 0.5);
  if (gray > gfxColorComp1) {
    gray = gfxColorComp1;
  }
#if SPLASH_CMYK
  cmyk.c = gfxColorComp1 - rgb.r;
  cmyk.m = gfxColorComp1 - rgb.g;
  cmyk.y = gfxColorComp1 - rgb.b;
  cmyk.k = 0;
  splash->setFillPattern(getColor(gray, &rgb, &cmyk));
#else
  splash->setFillPattern(getColor(gray, &rgb));
#endif
}

#if 1 //~tmp: turn off anti-aliasing temporarily
GBool SplashOutputDev::getVectorAntialias() {
  return splash->getVectorAntialias();
}

void SplashOutputDev::setVectorAntialias(GBool vaa) {
  splash->setVectorAntialias(vaa);
}
#endif