poppler/GfxState.cc

//========================================================================
//
// GfxState.cc
//
// Copyright 1996-2003 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 Kristian Høgsberg <krh@redhat.com>
// Copyright (C) 2006, 2007 Jeff Muizelaar <jeff@infidigm.net>
// Copyright (C) 2006, 2010 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2006-2011 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2009 Koji Otani <sho@bbr.jp>
// Copyright (C) 2009, 2011 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2009 Christian Persch <chpe@gnome.org>
// Copyright (C) 2010 Paweł Wiejacha <pawel.wiejacha@gmail.com>
// Copyright (C) 2010 Christian Feuersänger <cfeuersaenger@googlemail.com>
// Copyright (C) 2011 Andrea Canciani <ranma42@gmail.com>
//
// 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 <algorithm>
#include <stddef.h>
#include <math.h>
#include <string.h>
#include "goo/gmem.h"
#include "Error.h"
#include "Object.h"
#include "Array.h"
#include "Page.h"
#include "Gfx.h"
#include "GfxState.h"
#include "GfxState_helpers.h"
#include "GfxFont.h"
#include "GlobalParams.h"
#include "PopplerCache.h"

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

GBool Matrix::invertTo(Matrix *other) const
{
  double det;

  det = 1 / determinant();
  other->m[0] = m[3] * det;
  other->m[1] = -m[1] * det;
  other->m[2] = -m[2] * det;
  other->m[3] = m[0] * det;
  other->m[4] = (m[2] * m[5] - m[3] * m[4]) * det;
  other->m[5] = (m[1] * m[4] - m[0] * m[5]) * det;

  return gTrue;
}

void Matrix::transform(double x, double y, double *tx, double *ty) const
{
  double temp_x, temp_y;

  temp_x = m[0] * x + m[2] * y + m[4];
  temp_y = m[1] * x + m[3] * y + m[5];

  *tx = temp_x;
  *ty = temp_y;
}

// Matrix norm, taken from _cairo_matrix_transformed_circle_major_axis
double Matrix::norm() const
{
  double f, g, h, i, j;

  i = m[0]*m[0] + m[1]*m[1];
  j = m[2]*m[2] + m[3]*m[3];

  f = 0.5 * (i + j);
  g = 0.5 * (i - j);
  h = m[0]*m[2] + m[1]*m[3];

  return sqrt (f + hypot (g, h));
}

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

struct GfxBlendModeInfo {
  char *name;
  GfxBlendMode mode;
};

static const GfxBlendModeInfo gfxBlendModeNames[] = {
  { "Normal",     gfxBlendNormal },
  { "Compatible", gfxBlendNormal },
  { "Multiply",   gfxBlendMultiply },
  { "Screen",     gfxBlendScreen },
  { "Overlay",    gfxBlendOverlay },
  { "Darken",     gfxBlendDarken },
  { "Lighten",    gfxBlendLighten },
  { "ColorDodge", gfxBlendColorDodge },
  { "ColorBurn",  gfxBlendColorBurn },
  { "HardLight",  gfxBlendHardLight },
  { "SoftLight",  gfxBlendSoftLight },
  { "Difference", gfxBlendDifference },
  { "Exclusion",  gfxBlendExclusion },
  { "Hue",        gfxBlendHue },
  { "Saturation", gfxBlendSaturation },
  { "Color",      gfxBlendColor },
  { "Luminosity", gfxBlendLuminosity }
};

#define nGfxBlendModeNames \
          ((int)((sizeof(gfxBlendModeNames) / sizeof(GfxBlendModeInfo))))
	 
//------------------------------------------------------------------------
// 
// NB: This must match the GfxColorSpaceMode enum defined in
// GfxState.h
static char *gfxColorSpaceModeNames[] = {
  "DeviceGray",
  "CalGray",
  "DeviceRGB",
  "CalRGB",
  "DeviceCMYK",
  "Lab",
  "ICCBased",
  "Indexed",
  "Separation",
  "DeviceN",
  "Pattern"
};

#define nGfxColorSpaceModes ((sizeof(gfxColorSpaceModeNames) / sizeof(char *)))

#ifdef USE_CMS

#include <lcms.h>

#define COLOR_PROFILE_DIR "/ColorProfiles/"
#define GLOBAL_COLOR_PROFILE_DIR POPPLER_DATADIR COLOR_PROFILE_DIR

void GfxColorTransform::doTransform(void *in, void *out, unsigned int size) {
  cmsDoTransform(transform, in, out, size);
}

// transformA should be a cmsHTRANSFORM
GfxColorTransform::GfxColorTransform(void *transformA) {
  transform = transformA;
  refCount = 1;
}

GfxColorTransform::~GfxColorTransform() {
  cmsDeleteTransform(transform);
}

void GfxColorTransform::ref() {
  refCount++;
}

unsigned int GfxColorTransform::unref() {
  return --refCount;
}

static cmsHPROFILE RGBProfile = NULL;
static GooString *displayProfileName = NULL; // display profile file Name
static cmsHPROFILE displayProfile = NULL; // display profile
static unsigned int displayPixelType = 0;
static GfxColorTransform *XYZ2DisplayTransform = NULL;

// convert color space signature to cmsColor type 
static unsigned int getCMSColorSpaceType(icColorSpaceSignature cs);
static unsigned int getCMSNChannels(icColorSpaceSignature cs);
static cmsHPROFILE loadColorProfile(const char *fileName);

void GfxColorSpace::setDisplayProfile(void *displayProfileA) {
  displayProfile = displayProfileA;
}

void GfxColorSpace::setDisplayProfileName(GooString *name) {
  displayProfileName = name->copy();
}

cmsHPROFILE GfxColorSpace::getRGBProfile() {
  return RGBProfile;
}

cmsHPROFILE GfxColorSpace::getDisplayProfile() {
  return displayProfile;
}

#endif

//------------------------------------------------------------------------
// GfxColorSpace
//------------------------------------------------------------------------

GfxColorSpace::GfxColorSpace() {
}

GfxColorSpace::~GfxColorSpace() {
}

GfxColorSpace *GfxColorSpace::parse(Object *csObj, Gfx *gfx) {
  GfxColorSpace *cs;
  Object obj1;

  cs = NULL;
  if (csObj->isName()) {
    if (csObj->isName("DeviceGray") || csObj->isName("G")) {
      cs = new GfxDeviceGrayColorSpace();
    } else if (csObj->isName("DeviceRGB") || csObj->isName("RGB")) {
      cs = new GfxDeviceRGBColorSpace();
    } else if (csObj->isName("DeviceCMYK") || csObj->isName("CMYK")) {
      cs = new GfxDeviceCMYKColorSpace();
    } else if (csObj->isName("Pattern")) {
      cs = new GfxPatternColorSpace(NULL);
    } else {
      error(-1, "Bad color space '%s'", csObj->getName());
    }
  } else if (csObj->isArray()) {
    csObj->arrayGet(0, &obj1);
    if (obj1.isName("DeviceGray") || obj1.isName("G")) {
      cs = new GfxDeviceGrayColorSpace();
    } else if (obj1.isName("DeviceRGB") || obj1.isName("RGB")) {
      cs = new GfxDeviceRGBColorSpace();
    } else if (obj1.isName("DeviceCMYK") || obj1.isName("CMYK")) {
      cs = new GfxDeviceCMYKColorSpace();
    } else if (obj1.isName("CalGray")) {
      cs = GfxCalGrayColorSpace::parse(csObj->getArray());
    } else if (obj1.isName("CalRGB")) {
      cs = GfxCalRGBColorSpace::parse(csObj->getArray());
    } else if (obj1.isName("Lab")) {
      cs = GfxLabColorSpace::parse(csObj->getArray());
    } else if (obj1.isName("ICCBased")) {
      cs = GfxICCBasedColorSpace::parse(csObj->getArray(), gfx);
    } else if (obj1.isName("Indexed") || obj1.isName("I")) {
      cs = GfxIndexedColorSpace::parse(csObj->getArray(), gfx);
    } else if (obj1.isName("Separation")) {
      cs = GfxSeparationColorSpace::parse(csObj->getArray(), gfx);
    } else if (obj1.isName("DeviceN")) {
      cs = GfxDeviceNColorSpace::parse(csObj->getArray(), gfx);
    } else if (obj1.isName("Pattern")) {
      cs = GfxPatternColorSpace::parse(csObj->getArray(), gfx);
    } else {
      error(-1, "Bad color space");
    }
    obj1.free();
  } else if (csObj->isDict()) {
    csObj->dictLookup("ColorSpace", &obj1);
    if (obj1.isName("DeviceGray")) {
      cs = new GfxDeviceGrayColorSpace();
    } else if (obj1.isName("DeviceRGB")) {
      cs = new GfxDeviceRGBColorSpace();
    } else if (obj1.isName("DeviceCMYK")) {
      cs = new GfxDeviceCMYKColorSpace();
    } else {
      error(-1, "Bad color space '%s'", csObj->getName());
    }
    obj1.free();
  } else {
    error(-1, "Bad color space - expected name, array or dict");
  }
  return cs;
}

void GfxColorSpace::getDefaultRanges(double *decodeLow, double *decodeRange,
				     int maxImgPixel) {
  int i;

  for (i = 0; i < getNComps(); ++i) {
    decodeLow[i] = 0;
    decodeRange[i] = 1;
  }
}

int GfxColorSpace::getNumColorSpaceModes() {
  return nGfxColorSpaceModes;
}

char *GfxColorSpace::getColorSpaceModeName(int idx) {
  return gfxColorSpaceModeNames[idx];
}

#ifdef USE_CMS
cmsHPROFILE loadColorProfile(const char *fileName)
{
  cmsHPROFILE hp = NULL;
  FILE *fp;

  if (fileName[0] == '/') {
    // full path
    // check if open the file
    if ((fp = fopen(fileName,"r")) != NULL) {
      fclose(fp);
      hp = cmsOpenProfileFromFile(fileName,"r");
    }
    return hp;
  }
  // try to load from user directory
  GooString *path = globalParams->getBaseDir();
  path->append(COLOR_PROFILE_DIR);
  path->append(fileName);
  // check if open the file
  if ((fp = fopen(path->getCString(),"r")) != NULL) {
    fclose(fp);
    hp = cmsOpenProfileFromFile(path->getCString(),"r");
  }
  delete path;
  if (hp == NULL) {
    // load from global directory
    path = new GooString(GLOBAL_COLOR_PROFILE_DIR);
    path->append(fileName);
    // check if open the file
    if ((fp = fopen(path->getCString(),"r")) != NULL) {
      fclose(fp);
      hp = cmsOpenProfileFromFile(path->getCString(),"r");
    }
    delete path;
  }
  return hp;
}

static int CMSError(int ecode, const char *msg)
{
    error(-1, "%s", msg);
    return 1;
}

int GfxColorSpace::setupColorProfiles()
{
  static GBool initialized = gFalse;
  cmsHTRANSFORM transform;
  unsigned int nChannels;

  // do only once
  if (initialized) return 0;
  initialized = gTrue;

  // set error handlor
  cmsSetErrorHandler(CMSError);

  if (displayProfile == NULL) {
    // load display profile if it was not already loaded.
    if (displayProfileName == NULL) {
      displayProfile = loadColorProfile("display.icc");
    } else if (displayProfileName->getLength() > 0) {
      displayProfile = loadColorProfile(displayProfileName->getCString());
    }
  }
  // load RGB profile
  RGBProfile = loadColorProfile("RGB.icc");
  if (RGBProfile == NULL) {
    /* use built in sRGB profile */
    RGBProfile = cmsCreate_sRGBProfile();
  }
  // create transforms
  if (displayProfile != NULL) {
    displayPixelType = getCMSColorSpaceType(cmsGetColorSpace(displayProfile));
    nChannels = getCMSNChannels(cmsGetColorSpace(displayProfile));
    // create transform from XYZ
    cmsHPROFILE XYZProfile = cmsCreateXYZProfile();
    if ((transform = cmsCreateTransform(XYZProfile, TYPE_XYZ_DBL,
	   displayProfile, 
	   COLORSPACE_SH(displayPixelType) |
	     CHANNELS_SH(nChannels) | BYTES_SH(1),
	  INTENT_RELATIVE_COLORIMETRIC,0)) == 0) {
      error(-1, "Can't create Lab transform");
    } else {
      XYZ2DisplayTransform = new GfxColorTransform(transform);
    }
    cmsCloseProfile(XYZProfile);
  }
  return 0;
}

unsigned int getCMSColorSpaceType(icColorSpaceSignature cs)
{
    switch (cs) {
    case icSigXYZData:
      return PT_XYZ;
      break;
    case icSigLabData:
      return PT_Lab;
      break;
    case icSigLuvData:
      return PT_YUV;
      break;
    case icSigYCbCrData:
      return PT_YCbCr;
      break;
    case icSigYxyData:
      return PT_Yxy;
      break;
    case icSigRgbData:
      return PT_RGB;
      break;
    case icSigGrayData:
      return PT_GRAY;
      break;
    case icSigHsvData:
      return PT_HSV;
      break;
    case icSigHlsData:
      return PT_HLS;
      break;
    case icSigCmykData:
      return PT_CMYK;
      break;
    case icSigCmyData:
      return PT_CMY;
      break;
    case icSig2colorData:
    case icSig3colorData:
    case icSig4colorData:
    case icSig5colorData:
    case icSig6colorData:
    case icSig7colorData:
    case icSig8colorData:
    case icSig9colorData:
    case icSig10colorData:
    case icSig11colorData:
    case icSig12colorData:
    case icSig13colorData:
    case icSig14colorData:
    case icSig15colorData:
    default:
      break;
    }
    return PT_RGB;
}

unsigned int getCMSNChannels(icColorSpaceSignature cs)
{
    switch (cs) {
    case icSigXYZData:
    case icSigLuvData:
    case icSigLabData:
    case icSigYCbCrData:
    case icSigYxyData:
    case icSigRgbData:
    case icSigHsvData:
    case icSigHlsData:
    case icSigCmyData:
    case icSig3colorData:
      return 3;
      break;
    case icSigGrayData:
      return 1;
      break;
    case icSigCmykData:
    case icSig4colorData:
      return 4;
      break;
    case icSig2colorData:
      return 2;
      break;
    case icSig5colorData:
      return 5;
      break;
    case icSig6colorData:
      return 6;
      break;
    case icSig7colorData:
      return 7;
      break;
    case icSig8colorData:
      return 8;
      break;
    case icSig9colorData:
      return 9;
      break;
    case icSig10colorData:
      return 10;
      break;
    case icSig11colorData:
      return 11;
      break;
    case icSig12colorData:
      return 12;
      break;
    case icSig13colorData:
      return 13;
      break;
    case icSig14colorData:
      return 14;
      break;
    case icSig15colorData:
      return 15;
    default:
      break;
    }
    return 3;
}

#endif

//------------------------------------------------------------------------
// GfxDeviceGrayColorSpace
//------------------------------------------------------------------------

GfxDeviceGrayColorSpace::GfxDeviceGrayColorSpace() {
}

GfxDeviceGrayColorSpace::~GfxDeviceGrayColorSpace() {
}

GfxColorSpace *GfxDeviceGrayColorSpace::copy() {
  return new GfxDeviceGrayColorSpace();
}

void GfxDeviceGrayColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  *gray = clip01(color->c[0]);
}

void GfxDeviceGrayColorSpace::getGrayLine(Guchar *in, Guchar *out, int length) {
  memcpy (out, in, length);
}

void GfxDeviceGrayColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  rgb->r = rgb->g = rgb->b = clip01(color->c[0]);
}

void GfxDeviceGrayColorSpace::getRGBLine(Guchar *in, unsigned int *out,
					 int length) {
  int i;

  for (i = 0; i < length; i++)
    out[i] = (in[i] << 16) | (in[i] << 8) | (in[i] << 0);
}

void GfxDeviceGrayColorSpace::getRGBLine(Guchar *in, Guchar *out, int length) {
  for (int i = 0; i < length; i++) {
    *out++ = in[i];
    *out++ = in[i];
    *out++ = in[i];
  }
}

void GfxDeviceGrayColorSpace::getRGBXLine(Guchar *in, Guchar *out, int length) {
  for (int i = 0; i < length; i++) {
    *out++ = in[i];
    *out++ = in[i];
    *out++ = in[i];
    *out++ = 255;
  }
}

void GfxDeviceGrayColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  cmyk->c = cmyk->m = cmyk->y = 0;
  cmyk->k = clip01(gfxColorComp1 - color->c[0]);
}

void GfxDeviceGrayColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0] = 0;
}

//------------------------------------------------------------------------
// GfxCalGrayColorSpace
//------------------------------------------------------------------------

GfxCalGrayColorSpace::GfxCalGrayColorSpace() {
  whiteX = whiteY = whiteZ = 1;
  blackX = blackY = blackZ = 0;
  gamma = 1;
}

GfxCalGrayColorSpace::~GfxCalGrayColorSpace() {
}

GfxColorSpace *GfxCalGrayColorSpace::copy() {
  GfxCalGrayColorSpace *cs;

  cs = new GfxCalGrayColorSpace();
  cs->whiteX = whiteX;
  cs->whiteY = whiteY;
  cs->whiteZ = whiteZ;
  cs->blackX = blackX;
  cs->blackY = blackY;
  cs->blackZ = blackZ;
  cs->gamma = gamma;
  return cs;
}

// This is the inverse of MatrixLMN in Example 4.10 from the PostScript
// Language Reference, Third Edition.
static const double xyzrgb[3][3] = {
  {  3.240449, -1.537136, -0.498531 },
  { -0.969265,  1.876011,  0.041556 },
  {  0.055643, -0.204026,  1.057229 }
};

GfxColorSpace *GfxCalGrayColorSpace::parse(Array *arr) {
  GfxCalGrayColorSpace *cs;
  Object obj1, obj2, obj3;

  arr->get(1, &obj1);
  if (!obj1.isDict()) {
    error(-1, "Bad CalGray color space");
    obj1.free();
    return NULL;
  }
  cs = new GfxCalGrayColorSpace();
  if (obj1.dictLookup("WhitePoint", &obj2)->isArray() &&
      obj2.arrayGetLength() == 3) {
    obj2.arrayGet(0, &obj3);
    if (likely(obj3.isNum()))
      cs->whiteX = obj3.getNum();
    obj3.free();
    obj2.arrayGet(1, &obj3);
    if (likely(obj3.isNum()))
      cs->whiteY = obj3.getNum();
    obj3.free();
    obj2.arrayGet(2, &obj3);
    if (likely(obj3.isNum()))
      cs->whiteZ = obj3.getNum();
    obj3.free();
  }
  obj2.free();
  if (obj1.dictLookup("BlackPoint", &obj2)->isArray() &&
      obj2.arrayGetLength() == 3) {
    obj2.arrayGet(0, &obj3);
    if (likely(obj3.isNum()))
      cs->blackX = obj3.getNum();
    obj3.free();
    obj2.arrayGet(1, &obj3);
    if (likely(obj3.isNum()))
      cs->blackY = obj3.getNum();
    obj3.free();
    obj2.arrayGet(2, &obj3);
    if (likely(obj3.isNum()))
      cs->blackZ = obj3.getNum();
    obj3.free();
  }
  obj2.free();
  if (obj1.dictLookup("Gamma", &obj2)->isNum()) {
    cs->gamma = obj2.getNum();
  }
  obj2.free();
  obj1.free();

  cs->kr = 1 / (xyzrgb[0][0] * cs->whiteX +
		xyzrgb[0][1] * cs->whiteY +
		xyzrgb[0][2] * cs->whiteZ);
  cs->kg = 1 / (xyzrgb[1][0] * cs->whiteX +
		xyzrgb[1][1] * cs->whiteY +
		xyzrgb[1][2] * cs->whiteZ);
  cs->kb = 1 / (xyzrgb[2][0] * cs->whiteX +
		xyzrgb[2][1] * cs->whiteY +
		xyzrgb[2][2] * cs->whiteZ);

  return cs;
}

// convert CalGray to media XYZ color space
// (not multiply by the white point)
void GfxCalGrayColorSpace::getXYZ(GfxColor *color, 
  double *pX, double *pY, double *pZ) {
  const double A = colToDbl(color->c[0]);
  const double xyzColor = pow(A,gamma);
  *pX = xyzColor;
  *pY = xyzColor;
  *pZ = xyzColor;
}

void GfxCalGrayColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  GfxRGB rgb;

#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_GRAY) {
    Guchar out[gfxColorMaxComps];
    double in[gfxColorMaxComps];
    double X, Y, Z;
    
    getXYZ(color,&X,&Y,&Z);
    in[0] = clip01(X);
    in[1] = clip01(Y);
    in[2] = clip01(Z);
    XYZ2DisplayTransform->doTransform(in,out,1);
    *gray = byteToCol(out[0]);
    return;
  }
#endif
  getRGB(color, &rgb);
  *gray = clip01((GfxColorComp)(0.299 * rgb.r +
				0.587 * rgb.g +
				0.114 * rgb.b + 0.5));
}

void GfxCalGrayColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  double X, Y, Z;
  double r, g, b;

  getXYZ(color,&X,&Y,&Z);
#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_RGB) {
    Guchar out[gfxColorMaxComps];
    double in[gfxColorMaxComps];
    
    in[0] = clip01(X);
    in[1] = clip01(Y);
    in[2] = clip01(Z);
    XYZ2DisplayTransform->doTransform(in,out,1);
    rgb->r = byteToCol(out[0]);
    rgb->g = byteToCol(out[1]);
    rgb->b = byteToCol(out[2]);
    return;
  }
#endif
  X *= whiteX;
  Y *= whiteY;
  Z *= whiteZ;
  // convert XYZ to RGB, including gamut mapping and gamma correction
  r = xyzrgb[0][0] * X + xyzrgb[0][1] * Y + xyzrgb[0][2] * Z;
  g = xyzrgb[1][0] * X + xyzrgb[1][1] * Y + xyzrgb[1][2] * Z;
  b = xyzrgb[2][0] * X + xyzrgb[2][1] * Y + xyzrgb[2][2] * Z;
  rgb->r = dblToCol(sqrt(clip01(r * kr)));
  rgb->g = dblToCol(sqrt(clip01(g * kg)));
  rgb->b = dblToCol(sqrt(clip01(b * kb)));
}

void GfxCalGrayColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  GfxRGB rgb;
  GfxColorComp c, m, y, k;

#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_CMYK) {
    double in[gfxColorMaxComps];
    Guchar out[gfxColorMaxComps];
    double X, Y, Z;
    
    getXYZ(color,&X,&Y,&Z);
    in[0] = clip01(X);
    in[1] = clip01(Y);
    in[2] = clip01(Z);
    
    XYZ2DisplayTransform->doTransform(in,out,1);
    cmyk->c = byteToCol(out[0]);
    cmyk->m = byteToCol(out[1]);
    cmyk->y = byteToCol(out[2]);
    cmyk->k = byteToCol(out[3]);
    return;
  }
#endif
  getRGB(color, &rgb);
  c = clip01(gfxColorComp1 - rgb.r);
  m = clip01(gfxColorComp1 - rgb.g);
  y = clip01(gfxColorComp1 - rgb.b);
  k = c;
  if (m < k) {
    k = m;
  }
  if (y < k) {
    k = y;
  }
  cmyk->c = c - k;
  cmyk->m = m - k;
  cmyk->y = y - k;
  cmyk->k = k;
}

void GfxCalGrayColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0] = 0;
}

//------------------------------------------------------------------------
// GfxDeviceRGBColorSpace
//------------------------------------------------------------------------

GfxDeviceRGBColorSpace::GfxDeviceRGBColorSpace() {
}

GfxDeviceRGBColorSpace::~GfxDeviceRGBColorSpace() {
}

GfxColorSpace *GfxDeviceRGBColorSpace::copy() {
  return new GfxDeviceRGBColorSpace();
}

void GfxDeviceRGBColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  *gray = clip01((GfxColorComp)(0.3 * color->c[0] +
		 0.59 * color->c[1] +
		 0.11 * color->c[2] + 0.5));
}

void GfxDeviceRGBColorSpace::getGrayLine(Guchar *in, Guchar *out, int length) {
  int i;

  for (i = 0; i < length; i++) {
    out[i] = 
      (in[i * 3 + 0] * 19595 + 
       in[i * 3 + 1] * 38469 + 
       in[i * 3 + 2] * 7472) / 65536;
  }
}

void GfxDeviceRGBColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  rgb->r = clip01(color->c[0]);
  rgb->g = clip01(color->c[1]);
  rgb->b = clip01(color->c[2]);
}

void GfxDeviceRGBColorSpace::getRGBLine(Guchar *in, unsigned int *out,
					int length) {
  Guchar *p;
  int i;

  for (i = 0, p = in; i < length; i++, p += 3)
    out[i] = (p[0] << 16) | (p[1] << 8) | (p[2] << 0);
}

void GfxDeviceRGBColorSpace::getRGBLine(Guchar *in, Guchar *out, int length) {
  for (int i = 0; i < length; i++) {
    *out++ = *in++;
    *out++ = *in++;
    *out++ = *in++;
  }
}

void GfxDeviceRGBColorSpace::getRGBXLine(Guchar *in, Guchar *out, int length) {
  for (int i = 0; i < length; i++) {
    *out++ = *in++;
    *out++ = *in++;
    *out++ = *in++;
    *out++ = 255;
  }
}
void GfxDeviceRGBColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  GfxColorComp c, m, y, k;

  c = clip01(gfxColorComp1 - color->c[0]);
  m = clip01(gfxColorComp1 - color->c[1]);
  y = clip01(gfxColorComp1 - color->c[2]);
  k = c;
  if (m < k) {
    k = m;
  }
  if (y < k) {
    k = y;
  }
  cmyk->c = c - k;
  cmyk->m = m - k;
  cmyk->y = y - k;
  cmyk->k = k;
}

void GfxDeviceRGBColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0] = 0;
  color->c[1] = 0;
  color->c[2] = 0;
}

//------------------------------------------------------------------------
// GfxCalRGBColorSpace
//------------------------------------------------------------------------

GfxCalRGBColorSpace::GfxCalRGBColorSpace() {
  whiteX = whiteY = whiteZ = 1;
  blackX = blackY = blackZ = 0;
  gammaR = gammaG = gammaB = 1;
  mat[0] = 1; mat[1] = 0; mat[2] = 0;
  mat[3] = 0; mat[4] = 1; mat[5] = 0;
  mat[6] = 0; mat[7] = 0; mat[8] = 1;
}

GfxCalRGBColorSpace::~GfxCalRGBColorSpace() {
}

GfxColorSpace *GfxCalRGBColorSpace::copy() {
  GfxCalRGBColorSpace *cs;
  int i;

  cs = new GfxCalRGBColorSpace();
  cs->whiteX = whiteX;
  cs->whiteY = whiteY;
  cs->whiteZ = whiteZ;
  cs->blackX = blackX;
  cs->blackY = blackY;
  cs->blackZ = blackZ;
  cs->gammaR = gammaR;
  cs->gammaG = gammaG;
  cs->gammaB = gammaB;
  for (i = 0; i < 9; ++i) {
    cs->mat[i] = mat[i];
  }
  return cs;
}

GfxColorSpace *GfxCalRGBColorSpace::parse(Array *arr) {
  GfxCalRGBColorSpace *cs;
  Object obj1, obj2, obj3;
  int i;

  arr->get(1, &obj1);
  if (!obj1.isDict()) {
    error(-1, "Bad CalRGB color space");
    obj1.free();
    return NULL;
  }
  cs = new GfxCalRGBColorSpace();
  if (obj1.dictLookup("WhitePoint", &obj2)->isArray() &&
      obj2.arrayGetLength() == 3) {
    obj2.arrayGet(0, &obj3);
    if (likely(obj3.isNum()))
      cs->whiteX = obj3.getNum();
    obj3.free();
    obj2.arrayGet(1, &obj3);
    if (likely(obj3.isNum()))
      cs->whiteY = obj3.getNum();
    obj3.free();
    obj2.arrayGet(2, &obj3);
    if (likely(obj3.isNum()))
      cs->whiteZ = obj3.getNum();
    obj3.free();
  }
  obj2.free();
  if (obj1.dictLookup("BlackPoint", &obj2)->isArray() &&
      obj2.arrayGetLength() == 3) {
    obj2.arrayGet(0, &obj3);
    if (likely(obj3.isNum()))
      cs->blackX = obj3.getNum();
    obj3.free();
    obj2.arrayGet(1, &obj3);
    if (likely(obj3.isNum()))
      cs->blackY = obj3.getNum();
    obj3.free();
    obj2.arrayGet(2, &obj3);
    if (likely(obj3.isNum()))
      cs->blackZ = obj3.getNum();
    obj3.free();
  }
  obj2.free();
  if (obj1.dictLookup("Gamma", &obj2)->isArray() &&
      obj2.arrayGetLength() == 3) {
    obj2.arrayGet(0, &obj3);
    if (likely(obj3.isNum()))
      cs->gammaR = obj3.getNum();
    obj3.free();
    obj2.arrayGet(1, &obj3);
    if (likely(obj3.isNum()))
      cs->gammaG = obj3.getNum();
    obj3.free();
    obj2.arrayGet(2, &obj3);
    if (likely(obj3.isNum()))
      cs->gammaB = obj3.getNum();
    obj3.free();
  }
  obj2.free();
  if (obj1.dictLookup("Matrix", &obj2)->isArray() &&
      obj2.arrayGetLength() == 9) {
    for (i = 0; i < 9; ++i) {
      obj2.arrayGet(i, &obj3);
      if (likely(obj3.isNum()))
        cs->mat[i] = obj3.getNum();
      obj3.free();
    }
  }
  obj2.free();
  obj1.free();

  cs->kr = 1 / (xyzrgb[0][0] * cs->whiteX +
		xyzrgb[0][1] * cs->whiteY +
		xyzrgb[0][2] * cs->whiteZ);
  cs->kg = 1 / (xyzrgb[1][0] * cs->whiteX +
		xyzrgb[1][1] * cs->whiteY +
		xyzrgb[1][2] * cs->whiteZ);
  cs->kb = 1 / (xyzrgb[2][0] * cs->whiteX +
		xyzrgb[2][1] * cs->whiteY +
		xyzrgb[2][2] * cs->whiteZ);

  return cs;
}

// convert CalRGB to XYZ color space
void GfxCalRGBColorSpace::getXYZ(GfxColor *color, 
  double *pX, double *pY, double *pZ) {
  double A, B, C;

  A = pow(colToDbl(color->c[0]), gammaR);
  B = pow(colToDbl(color->c[1]), gammaG);
  C = pow(colToDbl(color->c[2]), gammaB);
  *pX = mat[0] * A + mat[3] * B + mat[6] * C;
  *pY = mat[1] * A + mat[4] * B + mat[7] * C;
  *pZ = mat[2] * A + mat[5] * B + mat[8] * C;
}

void GfxCalRGBColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  GfxRGB rgb;

#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_GRAY) {
    Guchar out[gfxColorMaxComps];
    double in[gfxColorMaxComps];
    double X, Y, Z;
    
    getXYZ(color,&X,&Y,&Z);
    in[0] = clip01(X);
    in[1] = clip01(Y);
    in[2] = clip01(Z);
    XYZ2DisplayTransform->doTransform(in,out,1);
    *gray = byteToCol(out[0]);
    return;
  }
#endif
  getRGB(color, &rgb);
  *gray = clip01((GfxColorComp)(0.299 * rgb.r +
				0.587 * rgb.g +
				0.114 * rgb.b + 0.5));
}

void GfxCalRGBColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  double X, Y, Z;
  double r, g, b;

  getXYZ(color,&X,&Y,&Z);
#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_RGB) {
    Guchar out[gfxColorMaxComps];
    double in[gfxColorMaxComps];
    
    in[0] = clip01(X/whiteX);
    in[1] = clip01(Y/whiteY);
    in[2] = clip01(Z/whiteZ);
    XYZ2DisplayTransform->doTransform(in,out,1);
    rgb->r = byteToCol(out[0]);
    rgb->g = byteToCol(out[1]);
    rgb->b = byteToCol(out[2]);
    return;
  }
#endif
  // convert XYZ to RGB, including gamut mapping and gamma correction
  r = xyzrgb[0][0] * X + xyzrgb[0][1] * Y + xyzrgb[0][2] * Z;
  g = xyzrgb[1][0] * X + xyzrgb[1][1] * Y + xyzrgb[1][2] * Z;
  b = xyzrgb[2][0] * X + xyzrgb[2][1] * Y + xyzrgb[2][2] * Z;
  rgb->r = dblToCol(sqrt(clip01(r)));
  rgb->g = dblToCol(sqrt(clip01(g)));
  rgb->b = dblToCol(sqrt(clip01(b)));
}

void GfxCalRGBColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  GfxRGB rgb;
  GfxColorComp c, m, y, k;

#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_CMYK) {
    double in[gfxColorMaxComps];
    Guchar out[gfxColorMaxComps];
    double X, Y, Z;
    
    getXYZ(color,&X,&Y,&Z);
    in[0] = clip01(X);
    in[1] = clip01(Y);
    in[2] = clip01(Z);
    XYZ2DisplayTransform->doTransform(in,out,1);
    cmyk->c = byteToCol(out[0]);
    cmyk->m = byteToCol(out[1]);
    cmyk->y = byteToCol(out[2]);
    cmyk->k = byteToCol(out[3]);
    return;
  }
#endif
  getRGB(color, &rgb);
  c = clip01(gfxColorComp1 - rgb.r);
  m = clip01(gfxColorComp1 - rgb.g);
  y = clip01(gfxColorComp1 - rgb.b);
  k = c;
  if (m < k) {
    k = m;
  }
  if (y < k) {
    k = y;
  }
  cmyk->c = c - k;
  cmyk->m = m - k;
  cmyk->y = y - k;
  cmyk->k = k;
}

void GfxCalRGBColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0] = 0;
  color->c[1] = 0;
  color->c[2] = 0;
}

//------------------------------------------------------------------------
// GfxDeviceCMYKColorSpace
//------------------------------------------------------------------------

GfxDeviceCMYKColorSpace::GfxDeviceCMYKColorSpace() {
}

GfxDeviceCMYKColorSpace::~GfxDeviceCMYKColorSpace() {
}

GfxColorSpace *GfxDeviceCMYKColorSpace::copy() {
  return new GfxDeviceCMYKColorSpace();
}

void GfxDeviceCMYKColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  *gray = clip01((GfxColorComp)(gfxColorComp1 - color->c[3]
				- 0.3  * color->c[0]
				- 0.59 * color->c[1]
				- 0.11 * color->c[2] + 0.5));
}

void GfxDeviceCMYKColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  double c, m, y, k, c1, m1, y1, k1, r, g, b;
    
  c = colToDbl(color->c[0]);
  m = colToDbl(color->c[1]);
  y = colToDbl(color->c[2]);
  k = colToDbl(color->c[3]);
  c1 = 1 - c;
  m1 = 1 - m;
  y1 = 1 - y;
  k1 = 1 - k;
  cmykToRGBMatrixMultiplication(c, m, y, k, c1, m1, y1, k1, r, g, b);
  rgb->r = clip01(dblToCol(r));
  rgb->g = clip01(dblToCol(g));
  rgb->b = clip01(dblToCol(b));
}

static inline void GfxDeviceCMYKColorSpacegetRGBLineHelper(Guchar *&in, double &r, double &g, double &b)
{
  double c, m, y, k, c1, m1, y1, k1;
  
  c = byteToDbl(*in++);
  m = byteToDbl(*in++);
  y = byteToDbl(*in++);
  k = byteToDbl(*in++);
  c1 = 1 - c;
  m1 = 1 - m;
  y1 = 1 - y;
  k1 = 1 - k;
  cmykToRGBMatrixMultiplication(c, m, y, k, c1, m1, y1, k1, r, g, b);
}

void GfxDeviceCMYKColorSpace::getRGBLine(Guchar *in, unsigned int *out, int length)
{
  double r, g, b;
  for (int i = 0; i < length; i++) {
    GfxDeviceCMYKColorSpacegetRGBLineHelper(in, r, g, b);
    *out++ = (dblToByte(clip01(r)) << 16) | (dblToByte(clip01(g)) << 8) | dblToByte(clip01(b));
  }
}

void GfxDeviceCMYKColorSpace::getRGBLine(Guchar *in, Guchar *out, int length)
{
  double r, g, b;
  
  for (int i = 0; i < length; i++) {
    GfxDeviceCMYKColorSpacegetRGBLineHelper(in, r, g, b);
    *out++ = dblToByte(clip01(r));
    *out++ = dblToByte(clip01(g));
    *out++ = dblToByte(clip01(b));
  }
}

void GfxDeviceCMYKColorSpace::getRGBXLine(Guchar *in, Guchar *out, int length)
{
  double r, g, b;
  
  for (int i = 0; i < length; i++) {
    GfxDeviceCMYKColorSpacegetRGBLineHelper(in, r, g, b);
    *out++ = dblToByte(clip01(r));
    *out++ = dblToByte(clip01(g));
    *out++ = dblToByte(clip01(b));
    *out++ = 255;
  }
}

void GfxDeviceCMYKColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  cmyk->c = clip01(color->c[0]);
  cmyk->m = clip01(color->c[1]);
  cmyk->y = clip01(color->c[2]);
  cmyk->k = clip01(color->c[3]);
}

void GfxDeviceCMYKColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0] = 0;
  color->c[1] = 0;
  color->c[2] = 0;
  color->c[3] = gfxColorComp1;
}

//------------------------------------------------------------------------
// GfxLabColorSpace
//------------------------------------------------------------------------

GfxLabColorSpace::GfxLabColorSpace() {
  whiteX = whiteY = whiteZ = 1;
  blackX = blackY = blackZ = 0;
  aMin = bMin = -100;
  aMax = bMax = 100;
}

GfxLabColorSpace::~GfxLabColorSpace() {
}

GfxColorSpace *GfxLabColorSpace::copy() {
  GfxLabColorSpace *cs;

  cs = new GfxLabColorSpace();
  cs->whiteX = whiteX;
  cs->whiteY = whiteY;
  cs->whiteZ = whiteZ;
  cs->blackX = blackX;
  cs->blackY = blackY;
  cs->blackZ = blackZ;
  cs->aMin = aMin;
  cs->aMax = aMax;
  cs->bMin = bMin;
  cs->bMax = bMax;
  cs->kr = kr;
  cs->kg = kg;
  cs->kb = kb;
  return cs;
}

GfxColorSpace *GfxLabColorSpace::parse(Array *arr) {
  GfxLabColorSpace *cs;
  Object obj1, obj2, obj3;

  arr->get(1, &obj1);
  if (!obj1.isDict()) {
    error(-1, "Bad Lab color space");
    obj1.free();
    return NULL;
  }
  cs = new GfxLabColorSpace();
  if (obj1.dictLookup("WhitePoint", &obj2)->isArray() &&
      obj2.arrayGetLength() == 3) {
    obj2.arrayGet(0, &obj3);
    cs->whiteX = obj3.getNum();
    obj3.free();
    obj2.arrayGet(1, &obj3);
    cs->whiteY = obj3.getNum();
    obj3.free();
    obj2.arrayGet(2, &obj3);
    cs->whiteZ = obj3.getNum();
    obj3.free();
  }
  obj2.free();
  if (obj1.dictLookup("BlackPoint", &obj2)->isArray() &&
      obj2.arrayGetLength() == 3) {
    obj2.arrayGet(0, &obj3);
    cs->blackX = obj3.getNum();
    obj3.free();
    obj2.arrayGet(1, &obj3);
    cs->blackY = obj3.getNum();
    obj3.free();
    obj2.arrayGet(2, &obj3);
    cs->blackZ = obj3.getNum();
    obj3.free();
  }
  obj2.free();
  if (obj1.dictLookup("Range", &obj2)->isArray() &&
      obj2.arrayGetLength() == 4) {
    obj2.arrayGet(0, &obj3);
    cs->aMin = obj3.getNum();
    obj3.free();
    obj2.arrayGet(1, &obj3);
    cs->aMax = obj3.getNum();
    obj3.free();
    obj2.arrayGet(2, &obj3);
    cs->bMin = obj3.getNum();
    obj3.free();
    obj2.arrayGet(3, &obj3);
    cs->bMax = obj3.getNum();
    obj3.free();
  }
  obj2.free();
  obj1.free();

  cs->kr = 1 / (xyzrgb[0][0] * cs->whiteX +
		xyzrgb[0][1] * cs->whiteY +
		xyzrgb[0][2] * cs->whiteZ);
  cs->kg = 1 / (xyzrgb[1][0] * cs->whiteX +
		xyzrgb[1][1] * cs->whiteY +
		xyzrgb[1][2] * cs->whiteZ);
  cs->kb = 1 / (xyzrgb[2][0] * cs->whiteX +
		xyzrgb[2][1] * cs->whiteY +
		xyzrgb[2][2] * cs->whiteZ);

  return cs;
}

void GfxLabColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  GfxRGB rgb;

#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_GRAY) {
    Guchar out[gfxColorMaxComps];
    double in[gfxColorMaxComps];
    
    getXYZ(color, &in[0], &in[1], &in[2]);
    XYZ2DisplayTransform->doTransform(in,out,1);
    *gray = byteToCol(out[0]);
    return;
  }
#endif
  getRGB(color, &rgb);
  *gray = clip01((GfxColorComp)(0.299 * rgb.r +
				0.587 * rgb.g +
				0.114 * rgb.b + 0.5));
}

// convert L*a*b* to media XYZ color space
// (not multiply by the white point)
void GfxLabColorSpace::getXYZ(GfxColor *color, 
  double *pX, double *pY, double *pZ) {
  double X, Y, Z;
  double t1, t2;

  t1 = (colToDbl(color->c[0]) + 16) / 116;
  t2 = t1 + colToDbl(color->c[1]) / 500;
  if (t2 >= (6.0 / 29.0)) {
    X = t2 * t2 * t2;
  } else {
    X = (108.0 / 841.0) * (t2 - (4.0 / 29.0));
  }
  if (t1 >= (6.0 / 29.0)) {
    Y = t1 * t1 * t1;
  } else {
    Y = (108.0 / 841.0) * (t1 - (4.0 / 29.0));
  }
  t2 = t1 - colToDbl(color->c[2]) / 200;
  if (t2 >= (6.0 / 29.0)) {
    Z = t2 * t2 * t2;
  } else {
    Z = (108.0 / 841.0) * (t2 - (4.0 / 29.0));
  }
  *pX = X;
  *pY = Y;
  *pZ = Z;
}

void GfxLabColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  double X, Y, Z;
  double r, g, b;

  getXYZ(color, &X, &Y, &Z);
#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_RGB) {
    Guchar out[gfxColorMaxComps];
    double in[gfxColorMaxComps];
    
    in[0] = clip01(X);
    in[1] = clip01(Y);
    in[2] = clip01(Z);
    XYZ2DisplayTransform->doTransform(in,out,1);
    rgb->r = byteToCol(out[0]);
    rgb->g = byteToCol(out[1]);
    rgb->b = byteToCol(out[2]);
    return;
  }
#endif
  X *= whiteX;
  Y *= whiteY;
  Z *= whiteZ;
  // convert XYZ to RGB, including gamut mapping and gamma correction
  r = xyzrgb[0][0] * X + xyzrgb[0][1] * Y + xyzrgb[0][2] * Z;
  g = xyzrgb[1][0] * X + xyzrgb[1][1] * Y + xyzrgb[1][2] * Z;
  b = xyzrgb[2][0] * X + xyzrgb[2][1] * Y + xyzrgb[2][2] * Z;
  rgb->r = dblToCol(sqrt(clip01(r * kr)));
  rgb->g = dblToCol(sqrt(clip01(g * kg)));
  rgb->b = dblToCol(sqrt(clip01(b * kb)));
}

void GfxLabColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  GfxRGB rgb;
  GfxColorComp c, m, y, k;

#ifdef USE_CMS
  if (XYZ2DisplayTransform != NULL && displayPixelType == PT_CMYK) {
    double in[gfxColorMaxComps];
    Guchar out[gfxColorMaxComps];
    
    getXYZ(color, &in[0], &in[1], &in[2]);
    XYZ2DisplayTransform->doTransform(in,out,1);
    cmyk->c = byteToCol(out[0]);
    cmyk->m = byteToCol(out[1]);
    cmyk->y = byteToCol(out[2]);
    cmyk->k = byteToCol(out[3]);
    return;
  }
#endif
  getRGB(color, &rgb);
  c = clip01(gfxColorComp1 - rgb.r);
  m = clip01(gfxColorComp1 - rgb.g);
  y = clip01(gfxColorComp1 - rgb.b);
  k = c;
  if (m < k) {
    k = m;
  }
  if (y < k) {
    k = y;
  }
  cmyk->c = c - k;
  cmyk->m = m - k;
  cmyk->y = y - k;
  cmyk->k = k;
}

void GfxLabColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0] = 0;
  if (aMin > 0) {
    color->c[1] = dblToCol(aMin);
  } else if (aMax < 0) {
    color->c[1] = dblToCol(aMax);
  } else {
    color->c[1] = 0;
  }
  if (bMin > 0) {
    color->c[2] = dblToCol(bMin);
  } else if (bMax < 0) {
    color->c[2] = dblToCol(bMax);
  } else {
    color->c[2] = 0;
  }
}

void GfxLabColorSpace::getDefaultRanges(double *decodeLow, double *decodeRange,
					int maxImgPixel) {
  decodeLow[0] = 0;
  decodeRange[0] = 100;
  decodeLow[1] = aMin;
  decodeRange[1] = aMax - aMin;
  decodeLow[2] = bMin;
  decodeRange[2] = bMax - bMin;
}

//------------------------------------------------------------------------
// GfxICCBasedColorSpace
//------------------------------------------------------------------------

class GfxICCBasedColorSpaceKey : public PopplerCacheKey
{
  public:
    GfxICCBasedColorSpaceKey(int numA, int genA) : num(numA), gen(genA)
    {
    }
    
    bool operator==(const PopplerCacheKey &key) const
    {
      const GfxICCBasedColorSpaceKey *k = static_cast<const GfxICCBasedColorSpaceKey*>(&key);
      return k->num == num && k->gen == gen;
    }
    
    int num, gen;
};

class GfxICCBasedColorSpaceItem : public PopplerCacheItem
{
  public:
    GfxICCBasedColorSpaceItem(GfxICCBasedColorSpace *csA)
    {
      cs = static_cast<GfxICCBasedColorSpace*>(csA->copy());
    }
    
    ~GfxICCBasedColorSpaceItem()
    {
      delete cs;
    }
    
    GfxICCBasedColorSpace *cs;
};

GfxICCBasedColorSpace::GfxICCBasedColorSpace(int nCompsA, GfxColorSpace *altA,
					     Ref *iccProfileStreamA) {
  nComps = nCompsA;
  alt = altA;
  iccProfileStream = *iccProfileStreamA;
  rangeMin[0] = rangeMin[1] = rangeMin[2] = rangeMin[3] = 0;
  rangeMax[0] = rangeMax[1] = rangeMax[2] = rangeMax[3] = 1;
#ifdef USE_CMS
  transform = NULL;
  lineTransform = NULL;
#endif
}

GfxICCBasedColorSpace::~GfxICCBasedColorSpace() {
  delete alt;
#ifdef USE_CMS
  if (transform != NULL) {
    if (transform->unref() == 0) delete transform;
  }
  if (lineTransform != NULL) {
    if (lineTransform->unref() == 0) delete lineTransform;
  }
#endif
}

GfxColorSpace *GfxICCBasedColorSpace::copy() {
  GfxICCBasedColorSpace *cs;
  int i;

  cs = new GfxICCBasedColorSpace(nComps, alt->copy(), &iccProfileStream);
  for (i = 0; i < 4; ++i) {
    cs->rangeMin[i] = rangeMin[i];
    cs->rangeMax[i] = rangeMax[i];
  }
#ifdef USE_CMS
  cs->transform = transform;
  if (transform != NULL) transform->ref();
  cs->lineTransform = lineTransform;
  if (lineTransform != NULL) lineTransform->ref();
#endif
  return cs;
}

GfxColorSpace *GfxICCBasedColorSpace::parse(Array *arr, Gfx *gfx) {
  GfxICCBasedColorSpace *cs;
  Ref iccProfileStreamA;
  int nCompsA;
  GfxColorSpace *altA;
  Dict *dict;
  Object obj1, obj2, obj3;
  int i;

  arr->getNF(1, &obj1);
  if (obj1.isRef()) {
    iccProfileStreamA = obj1.getRef();
  } else {
    iccProfileStreamA.num = 0;
    iccProfileStreamA.gen = 0;
  }
  obj1.free();
#ifdef USE_CMS
  // check cache
  if (gfx && iccProfileStreamA.num > 0) {
    GfxICCBasedColorSpaceKey k(iccProfileStreamA.num, iccProfileStreamA.gen);
    GfxICCBasedColorSpaceItem *item = static_cast<GfxICCBasedColorSpaceItem *>(gfx->getIccColorSpaceCache()->lookup(k));
    if (item != NULL)
    {
      cs = static_cast<GfxICCBasedColorSpace*>(item->cs->copy());
      return cs;
    }
  }
#endif
  arr->get(1, &obj1);
  if (!obj1.isStream()) {
    error(-1, "Bad ICCBased color space (stream)");
    obj1.free();
    return NULL;
  }
  dict = obj1.streamGetDict();
  if (!dict->lookup("N", &obj2)->isInt()) {
    error(-1, "Bad ICCBased color space (N)");
    obj2.free();
    obj1.free();
    return NULL;
  }
  nCompsA = obj2.getInt();
  obj2.free();
  if (nCompsA > gfxColorMaxComps) {
    error(-1, "ICCBased color space with too many (%d > %d) components",
	  nCompsA, gfxColorMaxComps);
    nCompsA = gfxColorMaxComps;
  }
  if (dict->lookup("Alternate", &obj2)->isNull() ||
      !(altA = GfxColorSpace::parse(&obj2, gfx))) {
    switch (nCompsA) {
    case 1:
      altA = new GfxDeviceGrayColorSpace();
      break;
    case 3:
      altA = new GfxDeviceRGBColorSpace();
      break;
    case 4:
      altA = new GfxDeviceCMYKColorSpace();
      break;
    default:
      error(-1, "Bad ICCBased color space - invalid N");
      obj2.free();
      obj1.free();
      return NULL;
    }
  }
  obj2.free();
  cs = new GfxICCBasedColorSpace(nCompsA, altA, &iccProfileStreamA);
  if (dict->lookup("Range", &obj2)->isArray() &&
      obj2.arrayGetLength() == 2 * nCompsA) {
    Object obj4;
    for (i = 0; i < nCompsA; ++i) {
      obj2.arrayGet(2*i, &obj3);
      obj2.arrayGet(2*i+1, &obj4);
      if (obj3.isNum() && obj4.isNum()) {
        cs->rangeMin[i] = obj3.getNum();
        cs->rangeMax[i] = obj4.getNum();
      }
      obj3.free();
      obj4.free();
    }
  }
  obj2.free();
  obj1.free();

#ifdef USE_CMS
  arr->get(1, &obj1);
  dict = obj1.streamGetDict();
  Guchar *profBuf;
  Stream *iccStream = obj1.getStream();
  int length = 0;

  profBuf = iccStream->toUnsignedChars(&length, 65536, 65536);
  cmsHPROFILE hp = cmsOpenProfileFromMem(profBuf,length);
  gfree(profBuf);
  if (hp == 0) {
    error(-1, "read ICCBased color space profile error");
  } else {
    cmsHPROFILE dhp = displayProfile;
    if (dhp == NULL) dhp = RGBProfile;
    unsigned int cst = getCMSColorSpaceType(cmsGetColorSpace(hp));
    unsigned int dNChannels = getCMSNChannels(cmsGetColorSpace(dhp));
    unsigned int dcst = getCMSColorSpaceType(cmsGetColorSpace(dhp));
    cmsHTRANSFORM transform;
    if ((transform = cmsCreateTransform(hp,
	   COLORSPACE_SH(cst) |CHANNELS_SH(nCompsA) | BYTES_SH(1),
	   dhp,
	   COLORSPACE_SH(dcst) |
	     CHANNELS_SH(dNChannels) | BYTES_SH(1),
	  INTENT_RELATIVE_COLORIMETRIC,0)) == 0) {
      error(-1, "Can't create transform");
      cs->transform = NULL;
    } else {
      cs->transform = new GfxColorTransform(transform);
    }
    if (dcst == PT_RGB) {
       // create line transform only when the display is RGB type color space 
      if ((transform = cmsCreateTransform(hp,
	    CHANNELS_SH(nCompsA) | BYTES_SH(1),dhp,
	    TYPE_RGB_8,INTENT_RELATIVE_COLORIMETRIC,0)) == 0) {
	error(-1, "Can't create transform");
	cs->lineTransform = NULL;
      } else {
	cs->lineTransform = new GfxColorTransform(transform);
      }
    }
    cmsCloseProfile(hp);
  }
  obj1.free();
  // put this colorSpace into cache
  if (gfx && iccProfileStreamA.num > 0) {
    GfxICCBasedColorSpaceKey *k = new GfxICCBasedColorSpaceKey(iccProfileStreamA.num, iccProfileStreamA.gen);
    GfxICCBasedColorSpaceItem *item = new GfxICCBasedColorSpaceItem(cs);
    gfx->getIccColorSpaceCache()->put(k, item);
  }
#endif
  return cs;
}

void GfxICCBasedColorSpace::getGray(GfxColor *color, GfxGray *gray) {
#ifdef USE_CMS
  if (transform != 0 && displayPixelType == PT_GRAY) {
    Guchar in[gfxColorMaxComps];
    Guchar out[gfxColorMaxComps];
    
    for (int i = 0;i < nComps;i++) {
	in[i] = colToByte(color->c[i]);
    }
    transform->doTransform(in,out,1);
    *gray = byteToCol(out[0]);
  } else {
    GfxRGB rgb;
    getRGB(color,&rgb);
    *gray = clip01((GfxColorComp)(0.3 * rgb.r +
		   0.59 * rgb.g +
		   0.11 * rgb.b + 0.5));
  }
#else
  alt->getGray(color, gray);
#endif
}

void GfxICCBasedColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
#ifdef USE_CMS
  if (transform != 0
       && (displayProfile == NULL || displayPixelType == PT_RGB)) {
    Guchar in[gfxColorMaxComps];
    Guchar out[gfxColorMaxComps];
    
    for (int i = 0;i < nComps;i++) {
	in[i] = colToByte(color->c[i]);
    }
    transform->doTransform(in,out,1);
    rgb->r = byteToCol(out[0]);
    rgb->g = byteToCol(out[1]);
    rgb->b = byteToCol(out[2]);
  } else {
    alt->getRGB(color, rgb);
  }
#else
  alt->getRGB(color, rgb);
#endif
}

void GfxICCBasedColorSpace::getRGBLine(Guchar *in, unsigned int *out,
				       int length) {
#ifdef USE_CMS
  if (lineTransform != 0) {
    Guchar* tmp = (Guchar *)gmallocn(3 * length, sizeof(Guchar));
    lineTransform->doTransform(in, tmp, length);
    for (int i = 0; i < length; ++i) {
        Guchar *current = tmp + (i * 3);
        out[i] = (current[0] << 16) | (current[1] << 8) | current[2];
    }
    gfree(tmp);
  } else {
    alt->getRGBLine(in, out, length);
  }
#else
  alt->getRGBLine(in, out, length);
#endif
}

void GfxICCBasedColorSpace::getRGBLine(Guchar *in, Guchar *out, int length) {
#ifdef USE_CMS
  if (lineTransform != 0) {
    Guchar* tmp = (Guchar *)gmallocn(3 * length, sizeof(Guchar));
    lineTransform->doTransform(in, tmp, length);
    Guchar *current = tmp;
    for (int i = 0; i < length; ++i) {
        *out++ = *current++;
        *out++ = *current++;
        *out++ = *current++;
    }
    gfree(tmp);
  } else {
    alt->getRGBLine(in, out, length);
  }
#else
  alt->getRGBLine(in, out, length);
#endif
}

void GfxICCBasedColorSpace::getRGBXLine(Guchar *in, Guchar *out, int length) {
#ifdef USE_CMS
  if (lineTransform != 0) {
    Guchar* tmp = (Guchar *)gmallocn(3 * length, sizeof(Guchar));
    lineTransform->doTransform(in, tmp, length);
    Guchar *current = tmp;
    for (int i = 0; i < length; ++i) {
        *out++ = *current++;
        *out++ = *current++;
        *out++ = *current++;
        *out++ = 255;
    }
    gfree(tmp);
  } else {
    alt->getRGBXLine(in, out, length);
  }
#else
  alt->getRGBXLine(in, out, length);
#endif
}

void GfxICCBasedColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
#ifdef USE_CMS
  if (transform != NULL && displayPixelType == PT_CMYK) {
    Guchar in[gfxColorMaxComps];
    Guchar out[gfxColorMaxComps];
    
    for (int i = 0;i < nComps;i++) {
	in[i] = colToByte(color->c[i]);
    }
    transform->doTransform(in,out,1);
    cmyk->c = byteToCol(out[0]);
    cmyk->m = byteToCol(out[1]);
    cmyk->y = byteToCol(out[2]);
    cmyk->k = byteToCol(out[3]);
  } else {
    GfxRGB rgb;
    GfxColorComp c, m, y, k;

    getRGB(color,&rgb);
    c = clip01(gfxColorComp1 - rgb.r);
    m = clip01(gfxColorComp1 - rgb.g);
    y = clip01(gfxColorComp1 - rgb.b);
    k = c;
    if (m < k) {
      k = m;
    }
    if (y < k) {
      k = y;
    }
    cmyk->c = c - k;
    cmyk->m = m - k;
    cmyk->y = y - k;
    cmyk->k = k;
  }
#else
  alt->getCMYK(color, cmyk);
#endif
}

GBool GfxICCBasedColorSpace::useGetRGBLine() {
#ifdef USE_CMS
  return lineTransform != NULL || alt->useGetRGBLine();
#else
  return alt->useGetRGBLine();
#endif
}

void GfxICCBasedColorSpace::getDefaultColor(GfxColor *color) {
  int i;

  for (i = 0; i < nComps; ++i) {
    if (rangeMin[i] > 0) {
      color->c[i] = dblToCol(rangeMin[i]);
    } else if (rangeMax[i] < 0) {
      color->c[i] = dblToCol(rangeMax[i]);
    } else {
      color->c[i] = 0;
    }
  }
}

void GfxICCBasedColorSpace::getDefaultRanges(double *decodeLow,
					     double *decodeRange,
					     int maxImgPixel) {
  alt->getDefaultRanges(decodeLow, decodeRange, maxImgPixel);

#if 0
  // this is nominally correct, but some PDF files don't set the
  // correct ranges in the ICCBased dict
  int i;

  for (i = 0; i < nComps; ++i) {
    decodeLow[i] = rangeMin[i];
    decodeRange[i] = rangeMax[i] - rangeMin[i];
  }
#endif
}

//------------------------------------------------------------------------
// GfxIndexedColorSpace
//------------------------------------------------------------------------

GfxIndexedColorSpace::GfxIndexedColorSpace(GfxColorSpace *baseA,
					   int indexHighA) {
  base = baseA;
  indexHigh = indexHighA;
  lookup = (Guchar *)gmallocn((indexHigh + 1) * base->getNComps(),
			      sizeof(Guchar));
}

GfxIndexedColorSpace::~GfxIndexedColorSpace() {
  delete base;
  gfree(lookup);
}

GfxColorSpace *GfxIndexedColorSpace::copy() {
  GfxIndexedColorSpace *cs;

  cs = new GfxIndexedColorSpace(base->copy(), indexHigh);
  memcpy(cs->lookup, lookup,
	 (indexHigh + 1) * base->getNComps() * sizeof(Guchar));
  return cs;
}

GfxColorSpace *GfxIndexedColorSpace::parse(Array *arr, Gfx *gfx) {
  GfxIndexedColorSpace *cs;
  GfxColorSpace *baseA;
  int indexHighA;
  Object obj1;
  char *s;
  int n, i, j;

  if (arr->getLength() != 4) {
    error(-1, "Bad Indexed color space");
    goto err1;
  }
  arr->get(1, &obj1);
  if (!(baseA = GfxColorSpace::parse(&obj1, gfx))) {
    error(-1, "Bad Indexed color space (base color space)");
    goto err2;
  }
  obj1.free();
  if (!arr->get(2, &obj1)->isInt()) {
    error(-1, "Bad Indexed color space (hival)");
    delete baseA;
    goto err2;
  }
  indexHighA = obj1.getInt();
  if (indexHighA < 0 || indexHighA > 255) {
    // the PDF spec requires indexHigh to be in [0,255] -- allowing
    // values larger than 255 creates a security hole: if nComps *
    // indexHigh is greater than 2^31, the loop below may overwrite
    // past the end of the array
    int previousValue = indexHighA;
    if (indexHighA < 0) indexHighA = 0;
    else indexHighA = 255;
    error(-1, "Bad Indexed color space (invalid indexHigh value, was %d using %d to try to recover)", previousValue, indexHighA);
  }
  obj1.free();
  cs = new GfxIndexedColorSpace(baseA, indexHighA);
  arr->get(3, &obj1);
  n = baseA->getNComps();
  if (obj1.isStream()) {
    obj1.streamReset();
    for (i = 0; i <= indexHighA; ++i) {
      const int readChars = obj1.streamGetChars(n, &cs->lookup[i*n]);
      for (j = readChars; j < n; ++j) {
        error(-1, "Bad Indexed color space (lookup table stream too short) padding with zeroes");
        cs->lookup[i*n + j] = 0;
      }
    }
    obj1.streamClose();
  } else if (obj1.isString()) {
    if (obj1.getString()->getLength() < (indexHighA + 1) * n) {
      error(-1, "Bad Indexed color space (lookup table string too short)");
      goto err3;
    }
    s = obj1.getString()->getCString();
    for (i = 0; i <= indexHighA; ++i) {
      for (j = 0; j < n; ++j) {
	cs->lookup[i*n + j] = (Guchar)*s++;
      }
    }
  } else {
    error(-1, "Bad Indexed color space (lookup table)");
    goto err3;
  }
  obj1.free();
  return cs;

 err3:
  delete cs;
 err2:
  obj1.free();
 err1:
  return NULL;
}

GfxColor *GfxIndexedColorSpace::mapColorToBase(GfxColor *color,
					       GfxColor *baseColor) {
  Guchar *p;
  double low[gfxColorMaxComps], range[gfxColorMaxComps];
  int n, i;

  n = base->getNComps();
  base->getDefaultRanges(low, range, indexHigh);
  p = &lookup[(int)(colToDbl(color->c[0]) + 0.5) * n];
  for (i = 0; i < n; ++i) {
    baseColor->c[i] = dblToCol(low[i] + (p[i] / 255.0) * range[i]);
  }
  return baseColor;
}

void GfxIndexedColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  GfxColor color2;

  base->getGray(mapColorToBase(color, &color2), gray);
}

void GfxIndexedColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  GfxColor color2;

  base->getRGB(mapColorToBase(color, &color2), rgb);
}

void GfxIndexedColorSpace::getRGBLine(Guchar *in, unsigned int *out, int length) {
  Guchar *line;
  int i, j, n;

  n = base->getNComps();
  line = (Guchar *) gmallocn (length, n);
  for (i = 0; i < length; i++)
    for (j = 0; j < n; j++)
      line[i * n + j] = lookup[in[i] * n + j];

  base->getRGBLine(line, out, length);

  gfree (line);
}

void GfxIndexedColorSpace::getRGBLine(Guchar *in, Guchar *out, int length)
{
  Guchar *line;
  int i, j, n;

  n = base->getNComps();
  line = (Guchar *) gmallocn (length, n);
  for (i = 0; i < length; i++)
    for (j = 0; j < n; j++)
      line[i * n + j] = lookup[in[i] * n + j];

  base->getRGBLine(line, out, length);

  gfree (line);
}

void GfxIndexedColorSpace::getRGBXLine(Guchar *in, Guchar *out, int length)
{
  Guchar *line;
  int i, j, n;

  n = base->getNComps();
  line = (Guchar *) gmallocn (length, n);
  for (i = 0; i < length; i++)
    for (j = 0; j < n; j++)
      line[i * n + j] = lookup[in[i] * n + j];

  base->getRGBXLine(line, out, length);

  gfree (line);
}

void GfxIndexedColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  GfxColor color2;

  base->getCMYK(mapColorToBase(color, &color2), cmyk);
}

void GfxIndexedColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0] = 0;
}

void GfxIndexedColorSpace::getDefaultRanges(double *decodeLow,
					    double *decodeRange,
					    int maxImgPixel) {
  decodeLow[0] = 0;
  decodeRange[0] = maxImgPixel;
}

//------------------------------------------------------------------------
// GfxSeparationColorSpace
//------------------------------------------------------------------------

GfxSeparationColorSpace::GfxSeparationColorSpace(GooString *nameA,
						 GfxColorSpace *altA,
						 Function *funcA) {
  name = nameA;
  alt = altA;
  func = funcA;
  nonMarking = !name->cmp("None");
}

GfxSeparationColorSpace::~GfxSeparationColorSpace() {
  delete name;
  delete alt;
  delete func;
}

GfxColorSpace *GfxSeparationColorSpace::copy() {
  return new GfxSeparationColorSpace(name->copy(), alt->copy(), func->copy());
}

//~ handle the 'All' and 'None' colorants
GfxColorSpace *GfxSeparationColorSpace::parse(Array *arr, Gfx *gfx) {
  GfxSeparationColorSpace *cs;
  GooString *nameA;
  GfxColorSpace *altA;
  Function *funcA;
  Object obj1;

  if (arr->getLength() != 4) {
    error(-1, "Bad Separation color space");
    goto err1;
  }
  if (!arr->get(1, &obj1)->isName()) {
    error(-1, "Bad Separation color space (name)");
    goto err2;
  }
  nameA = new GooString(obj1.getName());
  obj1.free();
  arr->get(2, &obj1);
  if (!(altA = GfxColorSpace::parse(&obj1, gfx))) {
    error(-1, "Bad Separation color space (alternate color space)");
    goto err3;
  }
  obj1.free();
  arr->get(3, &obj1);
  if (!(funcA = Function::parse(&obj1))) {
    goto err4;
  }
  obj1.free();
  cs = new GfxSeparationColorSpace(nameA, altA, funcA);
  return cs;

 err4:
  delete altA;
 err3:
  delete nameA;
 err2:
  obj1.free();
 err1:
  return NULL;
}

void GfxSeparationColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  double x;
  double c[gfxColorMaxComps];
  GfxColor color2;
  int i;

  x = colToDbl(color->c[0]);
  func->transform(&x, c);
  for (i = 0; i < alt->getNComps(); ++i) {
    color2.c[i] = dblToCol(c[i]);
  }
  alt->getGray(&color2, gray);
}

void GfxSeparationColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  double x;
  double c[gfxColorMaxComps];
  GfxColor color2;
  int i;

  x = colToDbl(color->c[0]);
  func->transform(&x, c);
  for (i = 0; i < alt->getNComps(); ++i) {
    color2.c[i] = dblToCol(c[i]);
  }
  alt->getRGB(&color2, rgb);
}

void GfxSeparationColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  double x;
  double c[gfxColorMaxComps];
  GfxColor color2;
  int i;

  x = colToDbl(color->c[0]);
  func->transform(&x, c);
  for (i = 0; i < alt->getNComps(); ++i) {
    color2.c[i] = dblToCol(c[i]);
  }
  alt->getCMYK(&color2, cmyk);
}

void GfxSeparationColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0] = gfxColorComp1;
}

//------------------------------------------------------------------------
// GfxDeviceNColorSpace
//------------------------------------------------------------------------

GfxDeviceNColorSpace::GfxDeviceNColorSpace(int nCompsA,
					   GfxColorSpace *altA,
					   Function *funcA) {
  nComps = nCompsA;
  alt = altA;
  func = funcA;
  nonMarking = gFalse;
}

GfxDeviceNColorSpace::~GfxDeviceNColorSpace() {
  int i;

  for (i = 0; i < nComps; ++i) {
    delete names[i];
  }
  delete alt;
  delete func;
}

GfxColorSpace *GfxDeviceNColorSpace::copy() {
  GfxDeviceNColorSpace *cs;
  int i;

  cs = new GfxDeviceNColorSpace(nComps, alt->copy(), func->copy());
  for (i = 0; i < nComps; ++i) {
    cs->names[i] = names[i]->copy();
  }
  cs->nonMarking = nonMarking;
  return cs;
}

//~ handle the 'None' colorant
GfxColorSpace *GfxDeviceNColorSpace::parse(Array *arr, Gfx *gfx) {
  GfxDeviceNColorSpace *cs;
  int nCompsA;
  GooString *namesA[gfxColorMaxComps];
  GfxColorSpace *altA;
  Function *funcA;
  Object obj1, obj2;
  int i;

  if (arr->getLength() != 4 && arr->getLength() != 5) {
    error(-1, "Bad DeviceN color space");
    goto err1;
  }
  if (!arr->get(1, &obj1)->isArray()) {
    error(-1, "Bad DeviceN color space (names)");
    goto err2;
  }
  nCompsA = obj1.arrayGetLength();
  if (nCompsA > gfxColorMaxComps) {
    error(-1, "DeviceN color space with too many (%d > %d) components",
	  nCompsA, gfxColorMaxComps);
    nCompsA = gfxColorMaxComps;
  }
  for (i = 0; i < nCompsA; ++i) {
    if (!obj1.arrayGet(i, &obj2)->isName()) {
      error(-1, "Bad DeviceN color space (names)");
      obj2.free();
      goto err2;
    }
    namesA[i] = new GooString(obj2.getName());
    obj2.free();
  }
  obj1.free();
  arr->get(2, &obj1);
  if (!(altA = GfxColorSpace::parse(&obj1, gfx))) {
    error(-1, "Bad DeviceN color space (alternate color space)");
    goto err3;
  }
  obj1.free();
  arr->get(3, &obj1);
  if (!(funcA = Function::parse(&obj1))) {
    goto err4;
  }
  obj1.free();
  cs = new GfxDeviceNColorSpace(nCompsA, altA, funcA);
  cs->nonMarking = gTrue;
  for (i = 0; i < nCompsA; ++i) {
    cs->names[i] = namesA[i];
    if (namesA[i]->cmp("None")) {
      cs->nonMarking = gFalse;
    }
  }
  return cs;

 err4:
  delete altA;
 err3:
  for (i = 0; i < nCompsA; ++i) {
    delete namesA[i];
  }
 err2:
  obj1.free();
 err1:
  return NULL;
}

void GfxDeviceNColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  double x[gfxColorMaxComps], c[gfxColorMaxComps];
  GfxColor color2;
  int i;

  for (i = 0; i < nComps; ++i) {
    x[i] = colToDbl(color->c[i]);
  }
  func->transform(x, c);
  for (i = 0; i < alt->getNComps(); ++i) {
    color2.c[i] = dblToCol(c[i]);
  }
  alt->getGray(&color2, gray);
}

void GfxDeviceNColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  double x[gfxColorMaxComps], c[gfxColorMaxComps];
  GfxColor color2;
  int i;

  for (i = 0; i < nComps; ++i) {
    x[i] = colToDbl(color->c[i]);
  }
  func->transform(x, c);
  for (i = 0; i < alt->getNComps(); ++i) {
    color2.c[i] = dblToCol(c[i]);
  }
  alt->getRGB(&color2, rgb);
}

void GfxDeviceNColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  double x[gfxColorMaxComps], c[gfxColorMaxComps];
  GfxColor color2;
  int i;

  for (i = 0; i < nComps; ++i) {
    x[i] = colToDbl(color->c[i]);
  }
  func->transform(x, c);
  for (i = 0; i < alt->getNComps(); ++i) {
    color2.c[i] = dblToCol(c[i]);
  }
  alt->getCMYK(&color2, cmyk);
}

void GfxDeviceNColorSpace::getDefaultColor(GfxColor *color) {
  int i;

  for (i = 0; i < nComps; ++i) {
    color->c[i] = gfxColorComp1;
  }
}

//------------------------------------------------------------------------
// GfxPatternColorSpace
//------------------------------------------------------------------------

GfxPatternColorSpace::GfxPatternColorSpace(GfxColorSpace *underA) {
  under = underA;
}

GfxPatternColorSpace::~GfxPatternColorSpace() {
  if (under) {
    delete under;
  }
}

GfxColorSpace *GfxPatternColorSpace::copy() {
  return new GfxPatternColorSpace(under ? under->copy() :
				          (GfxColorSpace *)NULL);
}

GfxColorSpace *GfxPatternColorSpace::parse(Array *arr, Gfx *gfx) {
  GfxPatternColorSpace *cs;
  GfxColorSpace *underA;
  Object obj1;

  if (arr->getLength() != 1 && arr->getLength() != 2) {
    error(-1, "Bad Pattern color space");
    return NULL;
  }
  underA = NULL;
  if (arr->getLength() == 2) {
    arr->get(1, &obj1);
    if (!(underA = GfxColorSpace::parse(&obj1, gfx))) {
      error(-1, "Bad Pattern color space (underlying color space)");
      obj1.free();
      return NULL;
    }
    obj1.free();
  }
  cs = new GfxPatternColorSpace(underA);
  return cs;
}

void GfxPatternColorSpace::getGray(GfxColor *color, GfxGray *gray) {
  *gray = 0;
}

void GfxPatternColorSpace::getRGB(GfxColor *color, GfxRGB *rgb) {
  rgb->r = rgb->g = rgb->b = 0;
}

void GfxPatternColorSpace::getCMYK(GfxColor *color, GfxCMYK *cmyk) {
  cmyk->c = cmyk->m = cmyk->y = 0;
  cmyk->k = 1;
}

void GfxPatternColorSpace::getDefaultColor(GfxColor *color) {
  color->c[0]=0;
}

//------------------------------------------------------------------------
// Pattern
//------------------------------------------------------------------------

GfxPattern::GfxPattern(int typeA) {
  type = typeA;
}

GfxPattern::~GfxPattern() {
}

GfxPattern *GfxPattern::parse(Object *obj, Gfx *gfx) {
  GfxPattern *pattern;
  Object obj1;

  if (obj->isDict()) {
    obj->dictLookup("PatternType", &obj1);
  } else if (obj->isStream()) {
    obj->streamGetDict()->lookup("PatternType", &obj1);
  } else {
    return NULL;
  }
  pattern = NULL;
  if (obj1.isInt() && obj1.getInt() == 1) {
    pattern = GfxTilingPattern::parse(obj);
  } else if (obj1.isInt() && obj1.getInt() == 2) {
    pattern = GfxShadingPattern::parse(obj, gfx);
  }
  obj1.free();
  return pattern;
}

//------------------------------------------------------------------------
// GfxTilingPattern
//------------------------------------------------------------------------

GfxTilingPattern *GfxTilingPattern::parse(Object *patObj) {
  GfxTilingPattern *pat;
  Dict *dict;
  int paintTypeA, tilingTypeA;
  double bboxA[4], matrixA[6];
  double xStepA, yStepA;
  Object resDictA;
  Object obj1, obj2;
  int i;

  if (!patObj->isStream()) {
    return NULL;
  }
  dict = patObj->streamGetDict();

  if (dict->lookup("PaintType", &obj1)->isInt()) {
    paintTypeA = obj1.getInt();
  } else {
    paintTypeA = 1;
    error(-1, "Invalid or missing PaintType in pattern");
  }
  obj1.free();
  if (dict->lookup("TilingType", &obj1)->isInt()) {
    tilingTypeA = obj1.getInt();
  } else {
    tilingTypeA = 1;
    error(-1, "Invalid or missing TilingType in pattern");
  }
  obj1.free();
  bboxA[0] = bboxA[1] = 0;
  bboxA[2] = bboxA[3] = 1;
  if (dict->lookup("BBox", &obj1)->isArray() &&
      obj1.arrayGetLength() == 4) {
    for (i = 0; i < 4; ++i) {
      if (obj1.arrayGet(i, &obj2)->isNum()) {
	bboxA[i] = obj2.getNum();
      }
      obj2.free();
    }
  } else {
    error(-1, "Invalid or missing BBox in pattern");
  }
  obj1.free();
  if (dict->lookup("XStep", &obj1)->isNum()) {
    xStepA = obj1.getNum();
  } else {
    xStepA = 1;
    error(-1, "Invalid or missing XStep in pattern");
  }
  obj1.free();
  if (dict->lookup("YStep", &obj1)->isNum()) {
    yStepA = obj1.getNum();
  } else {
    yStepA = 1;
    error(-1, "Invalid or missing YStep in pattern");
  }
  obj1.free();
  if (!dict->lookup("Resources", &resDictA)->isDict()) {
    resDictA.free();
    resDictA.initNull();
    error(-1, "Invalid or missing Resources in pattern");
  }
  matrixA[0] = 1; matrixA[1] = 0;
  matrixA[2] = 0; matrixA[3] = 1;
  matrixA[4] = 0; matrixA[5] = 0;
  if (dict->lookup("Matrix", &obj1)->isArray() &&
      obj1.arrayGetLength() == 6) {
    for (i = 0; i < 6; ++i) {
      if (obj1.arrayGet(i, &obj2)->isNum()) {
	matrixA[i] = obj2.getNum();
      }
      obj2.free();
    }
  }
  obj1.free();

  pat = new GfxTilingPattern(paintTypeA, tilingTypeA, bboxA, xStepA, yStepA,
			     &resDictA, matrixA, patObj);
  resDictA.free();
  return pat;
}

GfxTilingPattern::GfxTilingPattern(int paintTypeA, int tilingTypeA,
				   double *bboxA, double xStepA, double yStepA,
				   Object *resDictA, double *matrixA,
				   Object *contentStreamA):
  GfxPattern(1)
{
  int i;

  paintType = paintTypeA;
  tilingType = tilingTypeA;
  for (i = 0; i < 4; ++i) {
    bbox[i] = bboxA[i];
  }
  xStep = xStepA;
  yStep = yStepA;
  resDictA->copy(&resDict);
  for (i = 0; i < 6; ++i) {
    matrix[i] = matrixA[i];
  }
  contentStreamA->copy(&contentStream);
}

GfxTilingPattern::~GfxTilingPattern() {
  resDict.free();
  contentStream.free();
}

GfxPattern *GfxTilingPattern::copy() {
  return new GfxTilingPattern(paintType, tilingType, bbox, xStep, yStep,
			      &resDict, matrix, &contentStream);
}

//------------------------------------------------------------------------
// GfxShadingPattern
//------------------------------------------------------------------------

GfxShadingPattern *GfxShadingPattern::parse(Object *patObj, Gfx *gfx) {
  Dict *dict;
  GfxShading *shadingA;
  double matrixA[6];
  Object obj1, obj2;
  int i;

  if (!patObj->isDict()) {
    return NULL;
  }
  dict = patObj->getDict();

  dict->lookup("Shading", &obj1);
  shadingA = GfxShading::parse(&obj1, gfx);
  obj1.free();
  if (!shadingA) {
    return NULL;
  }

  matrixA[0] = 1; matrixA[1] = 0;
  matrixA[2] = 0; matrixA[3] = 1;
  matrixA[4] = 0; matrixA[5] = 0;
  if (dict->lookup("Matrix", &obj1)->isArray() &&
      obj1.arrayGetLength() == 6) {
    for (i = 0; i < 6; ++i) {
      if (obj1.arrayGet(i, &obj2)->isNum()) {
	matrixA[i] = obj2.getNum();
      }
      obj2.free();
    }
  }
  obj1.free();

  return new GfxShadingPattern(shadingA, matrixA);
}

GfxShadingPattern::GfxShadingPattern(GfxShading *shadingA, double *matrixA):
  GfxPattern(2)
{
  int i;

  shading = shadingA;
  for (i = 0; i < 6; ++i) {
    matrix[i] = matrixA[i];
  }
}

GfxShadingPattern::~GfxShadingPattern() {
  delete shading;
}

GfxPattern *GfxShadingPattern::copy() {
  return new GfxShadingPattern(shading->copy(), matrix);
}

//------------------------------------------------------------------------
// GfxShading
//------------------------------------------------------------------------

GfxShading::GfxShading(int typeA) {
  type = typeA;
  colorSpace = NULL;
}

GfxShading::GfxShading(GfxShading *shading) {
  int i;

  type = shading->type;
  colorSpace = shading->colorSpace->copy();
  for (i = 0; i < gfxColorMaxComps; ++i) {
    background.c[i] = shading->background.c[i];
  }
  hasBackground = shading->hasBackground;
  xMin = shading->xMin;
  yMin = shading->yMin;
  xMax = shading->xMax;
  yMax = shading->yMax;
  hasBBox = shading->hasBBox;
}

GfxShading::~GfxShading() {
  if (colorSpace) {
    delete colorSpace;
  }
}

GfxShading *GfxShading::parse(Object *obj, Gfx *gfx) {
  GfxShading *shading;
  Dict *dict;
  int typeA;
  Object obj1;

  if (obj->isDict()) {
    dict = obj->getDict();
  } else if (obj->isStream()) {
    dict = obj->streamGetDict();
  } else {
    return NULL;
  }

  if (!dict->lookup("ShadingType", &obj1)->isInt()) {
    error(-1, "Invalid ShadingType in shading dictionary");
    obj1.free();
    return NULL;
  }
  typeA = obj1.getInt();
  obj1.free();

  switch (typeA) {
  case 1:
    shading = GfxFunctionShading::parse(dict, gfx);
    break;
  case 2:
    shading = GfxAxialShading::parse(dict, gfx);
    break;
  case 3:
    shading = GfxRadialShading::parse(dict, gfx);
    break;
  case 4:
    if (obj->isStream()) {
      shading = GfxGouraudTriangleShading::parse(4, dict, obj->getStream(), gfx);
    } else {
      error(-1, "Invalid Type 4 shading object");
      goto err1;
    }
    break;
  case 5:
    if (obj->isStream()) {
      shading = GfxGouraudTriangleShading::parse(5, dict, obj->getStream(), gfx);
    } else {
      error(-1, "Invalid Type 5 shading object");
      goto err1;
    }
    break;
  case 6:
    if (obj->isStream()) {
      shading = GfxPatchMeshShading::parse(6, dict, obj->getStream(), gfx);
    } else {
      error(-1, "Invalid Type 6 shading object");
      goto err1;
    }
    break;
  case 7:
    if (obj->isStream()) {
      shading = GfxPatchMeshShading::parse(7, dict, obj->getStream(), gfx);
    } else {
      error(-1, "Invalid Type 7 shading object");
      goto err1;
    }
    break;
  default:
    error(-1, "Unimplemented shading type %d", typeA);
    goto err1;
  }

  return shading;

 err1:
  return NULL;
}

GBool GfxShading::init(Dict *dict, Gfx *gfx) {
  Object obj1, obj2;
  int i;

  dict->lookup("ColorSpace", &obj1);
  if (!(colorSpace = GfxColorSpace::parse(&obj1, gfx))) {
    error(-1, "Bad color space in shading dictionary");
    obj1.free();
    return gFalse;
  }
  obj1.free();

  for (i = 0; i < gfxColorMaxComps; ++i) {
    background.c[i] = 0;
  }
  hasBackground = gFalse;
  if (dict->lookup("Background", &obj1)->isArray()) {
    if (obj1.arrayGetLength() == colorSpace->getNComps()) {
      hasBackground = gTrue;
      for (i = 0; i < colorSpace->getNComps(); ++i) {
	background.c[i] = dblToCol(obj1.arrayGet(i, &obj2)->getNum());
	obj2.free();
      }
    } else {
      error(-1, "Bad Background in shading dictionary");
    }
  }
  obj1.free();

  xMin = yMin = xMax = yMax = 0;
  hasBBox = gFalse;
  if (dict->lookup("BBox", &obj1)->isArray()) {
    if (obj1.arrayGetLength() == 4) {
      Object obj3, obj4, obj5;
      obj1.arrayGet(0, &obj2);
      obj1.arrayGet(1, &obj3);
      obj1.arrayGet(2, &obj4);
      obj1.arrayGet(3, &obj5);
      if (obj2.isNum() && obj3.isNum() && obj4.isNum() && obj5.isNum())
      {
        hasBBox = gTrue;