gfxstate.cc

swf文件查看工具,能够看flash文件的格式

  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) {
  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);
    break;
  case 2:
    shading = GfxAxialShading::parse(dict);
    break;
  case 3:
    shading = GfxRadialShading::parse(dict);
    break;
  case 4:
    if (obj->isStream()) {
      shading = GfxGouraudTriangleShading::parse(4, dict, obj->getStream());
    } else {
      error(-1, "Invalid Type 4 shading object");
      goto err1;
    }
    break;
  case 5:
    if (obj->isStream()) {
      shading = GfxGouraudTriangleShading::parse(5, dict, obj->getStream());
    } else {
      error(-1, "Invalid Type 5 shading object");
      goto err1;
    }
    break;
  case 6:
    if (obj->isStream()) {
      shading = GfxPatchMeshShading::parse(6, dict, obj->getStream());
    } else {
      error(-1, "Invalid Type 6 shading object");
      goto err1;
    }
    break;
  case 7:
    if (obj->isStream()) {
      shading = GfxPatchMeshShading::parse(7, dict, obj->getStream());
    } 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) {
  Object obj1, obj2;
  int i;

  dict->lookup("ColorSpace", &obj1);
  if (!(colorSpace = GfxColorSpace::parse(&obj1))) {
    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) {
      hasBBox = gTrue;
      xMin = obj1.arrayGet(0, &obj2)->getNum();
      obj2.free();
      yMin = obj1.arrayGet(1, &obj2)->getNum();
      obj2.free();
      xMax = obj1.arrayGet(2, &obj2)->getNum();
      obj2.free();
      yMax = obj1.arrayGet(3, &obj2)->getNum();
      obj2.free();
    } else {
      error(-1, "Bad BBox in shading dictionary");
    }
  }
  obj1.free();

  return gTrue;
}

//------------------------------------------------------------------------
// GfxFunctionShading
//------------------------------------------------------------------------

GfxFunctionShading::GfxFunctionShading(double x0A, double y0A,
				       double x1A, double y1A,
				       double *matrixA,
				       Function **funcsA, int nFuncsA):
  GfxShading(1)
{
  int i;

  x0 = x0A;
  y0 = y0A;
  x1 = x1A;
  y1 = y1A;
  for (i = 0; i < 6; ++i) {
    matrix[i] = matrixA[i];
  }
  nFuncs = nFuncsA;
  for (i = 0; i < nFuncs; ++i) {
    funcs[i] = funcsA[i];
  }
}

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

  x0 = shading->x0;
  y0 = shading->y0;
  x1 = shading->x1;
  y1 = shading->y1;
  for (i = 0; i < 6; ++i) {
    matrix[i] = shading->matrix[i];
  }
  nFuncs = shading->nFuncs;
  for (i = 0; i < nFuncs; ++i) {
    funcs[i] = shading->funcs[i]->copy();
  }
}

GfxFunctionShading::~GfxFunctionShading() {
  int i;

  for (i = 0; i < nFuncs; ++i) {
    delete funcs[i];
  }
}

GfxFunctionShading *GfxFunctionShading::parse(Dict *dict) {
  GfxFunctionShading *shading;
  double x0A, y0A, x1A, y1A;
  double matrixA[6];
  Function *funcsA[gfxColorMaxComps];
  int nFuncsA;
  Object obj1, obj2;
  int i;

  x0A = y0A = 0;
  x1A = y1A = 1;
  if (dict->lookup("Domain", &obj1)->isArray() &&
      obj1.arrayGetLength() == 4) {
    x0A = obj1.arrayGet(0, &obj2)->getNum();
    obj2.free();
    y0A = obj1.arrayGet(1, &obj2)->getNum();
    obj2.free();
    x1A = obj1.arrayGet(2, &obj2)->getNum();
    obj2.free();
    y1A = obj1.arrayGet(3, &obj2)->getNum();
    obj2.free();
  }
  obj1.free();

  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) {
    matrixA[0] = obj1.arrayGet(0, &obj2)->getNum();
    obj2.free();
    matrixA[1] = obj1.arrayGet(1, &obj2)->getNum();
    obj2.free();
    matrixA[2] = obj1.arrayGet(2, &obj2)->getNum();
    obj2.free();
    matrixA[3] = obj1.arrayGet(3, &obj2)->getNum();
    obj2.free();
    matrixA[4] = obj1.arrayGet(4, &obj2)->getNum();
    obj2.free();
    matrixA[5] = obj1.arrayGet(5, &obj2)->getNum();
    obj2.free();
  }
  obj1.free();

  dict->lookup("Function", &obj1);
  if (obj1.isArray()) {
    nFuncsA = obj1.arrayGetLength();
    if (nFuncsA > gfxColorMaxComps) {
      error(-1, "Invalid Function array in shading dictionary");
      goto err1;
    }
    for (i = 0; i < nFuncsA; ++i) {
      obj1.arrayGet(i, &obj2);
      if (!(funcsA[i] = Function::parse(&obj2))) {
	goto err2;
      }
      obj2.free();
    }
  } else {
    nFuncsA = 1;
    if (!(funcsA[0] = Function::parse(&obj1))) {
      goto err1;
    }
  }
  obj1.free();

  shading = new GfxFunctionShading(x0A, y0A, x1A, y1A, matrixA,
				   funcsA, nFuncsA);
  if (!shading->init(dict)) {
    delete shading;
    return NULL;
  }
  return shading;

 err2:
  obj2.free();
 err1:
  obj1.free();
  return NULL;
}

GfxShading *GfxFunctionShading::copy() {
  return new GfxFunctionShading(this);
}

void GfxFunctionShading::getColor(double x, double y, GfxColor *color) {
  double in[2], out[gfxColorMaxComps];
  int i;

  // NB: there can be one function with n outputs or n functions with
  // one output each (where n = number of color components)
  for (i = 0; i < gfxColorMaxComps; ++i) {
    out[i] = 0;
  }
  in[0] = x;
  in[1] = y;
  for (i = 0; i < nFuncs; ++i) {
    funcs[i]->transform(in, &out[i]);
  }
  for (i = 0; i < gfxColorMaxComps; ++i) {
    color->c[i] = dblToCol(out[i]);
  }
}

//------------------------------------------------------------------------
// GfxAxialShading
//------------------------------------------------------------------------

GfxAxialShading::GfxAxialShading(double x0A, double y0A,
				 double x1A, double y1A,
				 double t0A, double t1A,
				 Function **funcsA, int nFuncsA,
				 GBool extend0A, GBool extend1A):
  GfxShading(2)
{
  int i;

  x0 = x0A;
  y0 = y0A;
  x1 = x1A;
  y1 = y1A;
  t0 = t0A;
  t1 = t1A;
  nFuncs = nFuncsA;
  for (i = 0; i < nFuncs; ++i) {
    funcs[i] = funcsA[i];
  }
  extend0 = extend0A;
  extend1 = extend1A;
}

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

  x0 = shading->x0;
  y0 = shading->y0;
  x1 = shading->x1;
  y1 = shading->y1;
  t0 = shading->t0;
  y1 = shading->t1;
  nFuncs = shading->nFuncs;
  for (i = 0; i < nFuncs; ++i) {
    funcs[i] = shading->funcs[i]->copy();
  }
  extend0 = shading->extend0;
  extend1 = shading->extend1;
}

GfxAxialShading::~GfxAxialShading() {
  int i;

  for (i = 0; i < nFuncs; ++i) {
    delete funcs[i];
  }
}

GfxAxialShading *GfxAxialShading::parse(Dict *dict) {
  GfxAxialShading *shading;
  double x0A, y0A, x1A, y1A;
  double t0A, t1A;
  Function *funcsA[gfxColorMaxComps];
  int nFuncsA;
  GBool extend0A, extend1A;
  Object obj1, obj2;
  int i;

  x0A = y0A = x1A = y1A = 0;
  if (dict->lookup("Coords", &obj1)->isArray() &&
      obj1.arrayGetLength() == 4) {
    x0A = obj1.arrayGet(0, &obj2)->getNum();
    obj2.free();
    y0A = obj1.arrayGet(1, &obj2)->getNum();
    obj2.free();
    x1A = obj1.arrayGet(2, &obj2)->getNum();
    obj2.free();
    y1A = obj1.arrayGet(3, &obj2)->getNum();
    obj2.free();
  } else {
    error(-1, "Missing or invalid Coords in shading dictionary");
    goto err1;
  }
  obj1.free();

  t0A = 0;
  t1A = 1;
  if (dict->lookup("Domain", &obj1)->isArray() &&
      obj1.arrayGetLength() == 2) {
    t0A = obj1.arrayGet(0, &obj2)->getNum();
    obj2.free();
    t1A = obj1.arrayGet(1, &obj2)->getNum();
    obj2.free();
  }
  obj1.free();

  dict->lookup("Function", &obj1);
  if (obj1.isArray()) {
    nFuncsA = obj1.arrayGetLength();
    if (nFuncsA > gfxColorMaxComps) {
      error(-1, "Invalid Function array in shading dictionary");
      goto err1;
    }
    for (i = 0; i < nFuncsA; ++i) {
      obj1.arrayGet(i, &obj2);
      if (!(funcsA[i] = Function::parse(&obj2))) {
	obj1.free();
	obj2.free();
	goto err1;
      }
      obj2.free();
    }
  } else {
    nFuncsA = 1;
    if (!(funcsA[0] = Function::parse(&obj1))) {
      obj1.free();
      goto err1;
    }
  }
  obj1.free();

  extend0A = extend1A = gFalse;
  if (dict->lookup("Extend", &obj1)->isArray() &&
      obj1.arrayGetLength() == 2) {
    extend0A = obj1.arrayGet(0, &obj2)->getBool();
    obj2.free();
    extend1A = obj1.arrayGet(1, &obj2)->getBool();
    obj2.free();
  }
  obj1.free();

  shading = new GfxAxialShading(x0A, y0A, x1A, y1A, t0A, t1A,
				funcsA, nFuncsA, extend0A, extend1A);
  if (!shading->init(dict)) {
    delete shading;
    return NULL;
  }
  return shading;

 err1:
  return NULL;
}

GfxShading *GfxAxialShading::copy() {
  return new GfxAxialShading(this);
}

void GfxAxialShading::getColor(double t, GfxColor *color) {
  double out[gfxColorMaxComps];
  int i;

  // NB: there can be one function with n outputs or n functions with
  // one output each (where n = number of color components)
  for (i = 0; i < gfxColorMaxComps; ++i) {
    out[i] = 0;
  }
  for (i = 0; i < nFuncs; ++i) {
    funcs[i]->transform(&t, &out[i]);
  }
  for (i = 0; i < gfxColorMaxComps; ++i) {
    color->c[i] = dblToCol(out[i]);
  }
}

//------------------------------------------------------------------------
// GfxRadialShading
//------------------------------------------------------------------------

GfxRadialShading::GfxRadialShading(double x0A, double y0A, double r0A,
				   double x1A, double y1A, double r1A,
				   double t0A, double t1A,
				   Function **funcsA, int nFuncsA,
				   GBool extend0A, GBool extend1A):
  GfxShading(3)
{
  int i;

  x0 = x0A;
  y0 = y0A;
  r0 = r0A;
  x1 = x1A;
  y1 = y1A;
  r1 = r1A;
  t0 = t0A;
  t1 = t1A;
  nFuncs = nFuncsA;
  for (i = 0; i < nFuncs; ++i) {
    funcs[i] = funcsA[i];
  }
  extend0 = extend0A;
  extend1 = extend1A;
}

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

  x0 = shading->x0;
  y0 = shading->y0;
  r0 = shading->r0;
  x1 = shading->x1;
  y1 = shading->y1;
  r1 = shading->r1;
  t0 = shading->t0;
  y1 = shading->t1;
  nFuncs = shading->nFuncs;
  for (i = 0; i < nFuncs; ++i) {
    funcs[i] = shading->funcs[i]->copy();
  }
  extend0 = shading->extend0;
  extend1 = shading->extend1;