gfxstate.h

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  virtual void getGray(GfxColor *color, GfxGray *gray);
  virtual void getRGB(GfxColor *color, GfxRGB *rgb);
  virtual void getCMYK(GfxColor *color, GfxCMYK *cmyk);

  virtual int getNComps() { return 1; }
  virtual void getDefaultColor(GfxColor *color);

  virtual void getDefaultRanges(double *decodeLow, double *decodeRange,
				int maxImgPixel);

  // Indexed-specific access.
  GfxColorSpace *getBase() { return base; }
  int getIndexHigh() { return indexHigh; }
  Guchar *getLookup() { return lookup; }
  GfxColor *mapColorToBase(GfxColor *color, GfxColor *baseColor);

private:

  GfxColorSpace *base;		// base color space
  int indexHigh;		// max pixel value
  Guchar *lookup;		// lookup table
};

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

class GfxSeparationColorSpace: public GfxColorSpace {
public:

  GfxSeparationColorSpace(GString *nameA, GfxColorSpace *altA,
			  Function *funcA);
  virtual ~GfxSeparationColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csSeparation; }

  // Construct a Separation color space.  Returns NULL if unsuccessful.
  static GfxColorSpace *parse(Array *arr);

  virtual void getGray(GfxColor *color, GfxGray *gray);
  virtual void getRGB(GfxColor *color, GfxRGB *rgb);
  virtual void getCMYK(GfxColor *color, GfxCMYK *cmyk);

  virtual int getNComps() { return 1; }
  virtual void getDefaultColor(GfxColor *color);

  virtual GBool isNonMarking() { return nonMarking; }

  // Separation-specific access.
  GString *getName() { return name; }
  GfxColorSpace *getAlt() { return alt; }
  Function *getFunc() { return func; }

private:

  GString *name;		// colorant name
  GfxColorSpace *alt;		// alternate color space
  Function *func;		// tint transform (into alternate color space)
  GBool nonMarking;
};

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

class GfxDeviceNColorSpace: public GfxColorSpace {
public:

  GfxDeviceNColorSpace(int nCompsA, GfxColorSpace *alt, Function *func);
  virtual ~GfxDeviceNColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csDeviceN; }

  // Construct a DeviceN color space.  Returns NULL if unsuccessful.
  static GfxColorSpace *parse(Array *arr);

  virtual void getGray(GfxColor *color, GfxGray *gray);
  virtual void getRGB(GfxColor *color, GfxRGB *rgb);
  virtual void getCMYK(GfxColor *color, GfxCMYK *cmyk);

  virtual int getNComps() { return nComps; }
  virtual void getDefaultColor(GfxColor *color);

  virtual GBool isNonMarking() { return nonMarking; }

  // DeviceN-specific access.
  GString *getColorantName(int i) { return names[i]; }
  GfxColorSpace *getAlt() { return alt; }
  Function *getTintTransformFunc() { return func; }

private:

  int nComps;			// number of components
  GString			// colorant names
    *names[gfxColorMaxComps];
  GfxColorSpace *alt;		// alternate color space
  Function *func;		// tint transform (into alternate color space)
  GBool nonMarking;
};

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

class GfxPatternColorSpace: public GfxColorSpace {
public:

  GfxPatternColorSpace(GfxColorSpace *underA);
  virtual ~GfxPatternColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csPattern; }

  // Construct a Pattern color space.  Returns NULL if unsuccessful.
  static GfxColorSpace *parse(Array *arr);

  virtual void getGray(GfxColor *color, GfxGray *gray);
  virtual void getRGB(GfxColor *color, GfxRGB *rgb);
  virtual void getCMYK(GfxColor *color, GfxCMYK *cmyk);

  virtual int getNComps() { return 0; }
  virtual void getDefaultColor(GfxColor *color);

  // Pattern-specific access.
  GfxColorSpace *getUnder() { return under; }

private:

  GfxColorSpace *under;		// underlying color space (for uncolored
				//   patterns)
};

//------------------------------------------------------------------------
// GfxPattern
//------------------------------------------------------------------------

class GfxPattern {
public:

  GfxPattern(int typeA);
  virtual ~GfxPattern();

  static GfxPattern *parse(Object *obj);

  virtual GfxPattern *copy() = 0;

  int getType() { return type; }

private:

  int type;
};

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

class GfxTilingPattern: public GfxPattern {
public:

  static GfxTilingPattern *parse(Object *patObj);
  virtual ~GfxTilingPattern();

  virtual GfxPattern *copy();

  int getPaintType() { return paintType; }
  int getTilingType() { return tilingType; }
  double *getBBox() { return bbox; }
  double getXStep() { return xStep; }
  double getYStep() { return yStep; }
  Dict *getResDict()
    { return resDict.isDict() ? resDict.getDict() : (Dict *)NULL; }
  double *getMatrix() { return matrix; }
  Object *getContentStream() { return &contentStream; }

private:

  GfxTilingPattern(int paintTypeA, int tilingTypeA,
		   double *bboxA, double xStepA, double yStepA,
		   Object *resDictA, double *matrixA,
		   Object *contentStreamA);

  int paintType;
  int tilingType;
  double bbox[4];
  double xStep, yStep;
  Object resDict;
  double matrix[6];
  Object contentStream;
};

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

class GfxShadingPattern: public GfxPattern {
public:

  static GfxShadingPattern *parse(Object *patObj);
  virtual ~GfxShadingPattern();

  virtual GfxPattern *copy();

  GfxShading *getShading() { return shading; }
  double *getMatrix() { return matrix; }

private:

  GfxShadingPattern(GfxShading *shadingA, double *matrixA);

  GfxShading *shading;
  double matrix[6];
};

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

class GfxShading {
public:

  GfxShading(int typeA);
  GfxShading(GfxShading *shading);
  virtual ~GfxShading();

  static GfxShading *parse(Object *obj);

  virtual GfxShading *copy() = 0;

  int getType() { return type; }
  GfxColorSpace *getColorSpace() { return colorSpace; }
  GfxColor *getBackground() { return &background; }
  GBool getHasBackground() { return hasBackground; }
  void getBBox(double *xMinA, double *yMinA, double *xMaxA, double *yMaxA)
    { *xMinA = xMin; *yMinA = yMin; *xMaxA = xMax; *yMaxA = yMax; }
  GBool getHasBBox() { return hasBBox; }

protected:

  GBool init(Dict *dict);

  int type;
  GfxColorSpace *colorSpace;
  GfxColor background;
  GBool hasBackground;
  double xMin, yMin, xMax, yMax;
  GBool hasBBox;
};

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

class GfxFunctionShading: public GfxShading {
public:

  GfxFunctionShading(double x0A, double y0A,
		     double x1A, double y1A,
		     double *matrixA,
		     Function **funcsA, int nFuncsA);
  GfxFunctionShading(GfxFunctionShading *shading);
  virtual ~GfxFunctionShading();

  static GfxFunctionShading *parse(Dict *dict);

  virtual GfxShading *copy();

  void getDomain(double *x0A, double *y0A, double *x1A, double *y1A)
    { *x0A = x0; *y0A = y0; *x1A = x1; *y1A = y1; }
  double *getMatrix() { return matrix; }
  int getNFuncs() { return nFuncs; }
  Function *getFunc(int i) { return funcs[i]; }
  void getColor(double x, double y, GfxColor *color);

private:

  double x0, y0, x1, y1;
  double matrix[6];
  Function *funcs[gfxColorMaxComps];
  int nFuncs;
};

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

class GfxAxialShading: public GfxShading {
public:

  GfxAxialShading(double x0A, double y0A,
		  double x1A, double y1A,
		  double t0A, double t1A,
		  Function **funcsA, int nFuncsA,
		  GBool extend0A, GBool extend1A);
  GfxAxialShading(GfxAxialShading *shading);
  virtual ~GfxAxialShading();

  static GfxAxialShading *parse(Dict *dict);

  virtual GfxShading *copy();

  void getCoords(double *x0A, double *y0A, double *x1A, double *y1A)
    { *x0A = x0; *y0A = y0; *x1A = x1; *y1A = y1; }
  double getDomain0() { return t0; }
  double getDomain1() { return t1; }
  GBool getExtend0() { return extend0; }
  GBool getExtend1() { return extend1; }
  int getNFuncs() { return nFuncs; }
  Function *getFunc(int i) { return funcs[i]; }
  void getColor(double t, GfxColor *color);

private:

  double x0, y0, x1, y1;
  double t0, t1;
  Function *funcs[gfxColorMaxComps];
  int nFuncs;
  GBool extend0, extend1;
};

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

class GfxRadialShading: public GfxShading {
public:

  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);
  GfxRadialShading(GfxRadialShading *shading);
  virtual ~GfxRadialShading();

  static GfxRadialShading *parse(Dict *dict);

  virtual GfxShading *copy();

  void getCoords(double *x0A, double *y0A, double *r0A,
		 double *x1A, double *y1A, double *r1A)
    { *x0A = x0; *y0A = y0; *r0A = r0; *x1A = x1; *y1A = y1; *r1A = r1; }
  double getDomain0() { return t0; }
  double getDomain1() { return t1; }
  GBool getExtend0() { return extend0; }
  GBool getExtend1() { return extend1; }
  int getNFuncs() { return nFuncs; }
  Function *getFunc(int i) { return funcs[i]; }
  void getColor(double t, GfxColor *color);

private:

  double x0, y0, r0, x1, y1, r1;
  double t0, t1;
  Function *funcs[gfxColorMaxComps];
  int nFuncs;
  GBool extend0, extend1;
};

//------------------------------------------------------------------------
// GfxGouraudTriangleShading
//------------------------------------------------------------------------

struct GfxGouraudVertex {
  double x, y;
  GfxColor color;
};

class GfxGouraudTriangleShading: public GfxShading {
public:

  GfxGouraudTriangleShading(int typeA,
			    GfxGouraudVertex *verticesA, int nVerticesA,
			    int (*trianglesA)[3], int nTrianglesA,
			    Function **funcsA, int nFuncsA);
  GfxGouraudTriangleShading(GfxGouraudTriangleShading *shading);
  virtual ~GfxGouraudTriangleShading();

  static GfxGouraudTriangleShading *parse(int typeA, Dict *dict, Stream *str);

  virtual GfxShading *copy();

  int getNTriangles() { return nTriangles; }
  void getTriangle(int i, double *x0, double *y0, GfxColor *color0,
		   double *x1, double *y1, GfxColor *color1,
		   double *x2, double *y2, GfxColor *color2);

private:

  GfxGouraudVertex *vertices;
  int nVertices;
  int (*triangles)[3];
  int nTriangles;
  Function *funcs[gfxColorMaxComps];
  int nFuncs;
};

//------------------------------------------------------------------------
// GfxPatchMeshShading
//------------------------------------------------------------------------

struct GfxPatch {
  double x[4][4];
  double y[4][4];
  GfxColor color[2][2];
};

class GfxPatchMeshShading: public GfxShading {
public:

  GfxPatchMeshShading(int typeA, GfxPatch *patchesA, int nPatchesA,
		      Function **funcsA, int nFuncsA);
  GfxPatchMeshShading(GfxPatchMeshShading *shading);
  virtual ~GfxPatchMeshShading();

  static GfxPatchMeshShading *parse(int typeA, Dict *dict, Stream *str);