gfxstate.cc

swf文件查看工具,能够看flash文件的格式

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(GString *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) {
  GfxSeparationColorSpace *cs;
  GString *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 GString(obj1.getName());
  obj1.free();
  arr->get(2, &obj1);
  if (!(altA = GfxColorSpace::parse(&obj1))) {
    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) {
  GfxDeviceNColorSpace *cs;
  int nCompsA;
  GString *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 GString(obj2.getName());
    obj2.free();
  }
  obj1.free();
  arr->get(2, &obj1);
  if (!(altA = GfxColorSpace::parse(&obj1))) {
    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) {
  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))) {
      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) {
  // not used
}

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

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

GfxPattern::~GfxPattern() {
}

GfxPattern *GfxPattern::parse(Object *obj) {
  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);
  }
  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) {
  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);
  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;