gfxstate.h

swf文件查看工具,能够看flash文件的格式

//========================================================================
//
// GfxState.h
//
// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================

#ifndef GFXSTATE_H
#define GFXSTATE_H

#include <aconf.h>

#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif

#include "gtypes.h"
#include "Object.h"
#include "Function.h"

class Array;
class GfxFont;
class PDFRectangle;
class GfxShading;

//------------------------------------------------------------------------
// GfxBlendMode
//------------------------------------------------------------------------

enum GfxBlendMode {
  gfxBlendNormal,
  gfxBlendMultiply,
  gfxBlendScreen,
  gfxBlendOverlay,
  gfxBlendDarken,
  gfxBlendLighten,
  gfxBlendColorDodge,
  gfxBlendColorBurn,
  gfxBlendHardLight,
  gfxBlendSoftLight,
  gfxBlendDifference,
  gfxBlendExclusion,
  gfxBlendHue,
  gfxBlendSaturation,
  gfxBlendColor,
  gfxBlendLuminosity
};

//------------------------------------------------------------------------
// GfxColorComp
//------------------------------------------------------------------------

// 16.16 fixed point color component
typedef int GfxColorComp;

#define gfxColorComp1 0x10000

static inline GfxColorComp dblToCol(double x) {
  return (GfxColorComp)(x * gfxColorComp1);
}

static inline double colToDbl(GfxColorComp x) {
  return (double)x / (double)gfxColorComp1;
}

static inline GfxColorComp byteToCol(Guchar x) {
  // (x / 255) << 16  =  (0.0000000100000001... * x) << 16
  //                  =  ((x << 8) + (x) + (x >> 8) + ...) << 16
  //                  =  (x << 8) + (x) + (x >> 7)
  //                                      [for rounding]
  return (GfxColorComp)((x << 8) + x + (x >> 7));
}

static inline Guchar colToByte(GfxColorComp x) {
  // 255 * x + 0.5  =  256 * x - x + 0x8000
  return (Guchar)(((x << 8) - x + 0x8000) >> 16);
}

//------------------------------------------------------------------------
// GfxColor
//------------------------------------------------------------------------

#define gfxColorMaxComps funcMaxOutputs

struct GfxColor {
  GfxColorComp c[gfxColorMaxComps];
};

//------------------------------------------------------------------------
// GfxGray
//------------------------------------------------------------------------

typedef GfxColorComp GfxGray;

//------------------------------------------------------------------------
// GfxRGB
//------------------------------------------------------------------------

struct GfxRGB {
  GfxColorComp r, g, b;
};

//------------------------------------------------------------------------
// GfxCMYK
//------------------------------------------------------------------------

struct GfxCMYK {
  GfxColorComp c, m, y, k;
};

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

// NB: The nGfxColorSpaceModes constant and the gfxColorSpaceModeNames
// array defined in GfxState.cc must match this enum.
enum GfxColorSpaceMode {
  csDeviceGray,
  csCalGray,
  csDeviceRGB,
  csCalRGB,
  csDeviceCMYK,
  csLab,
  csICCBased,
  csIndexed,
  csSeparation,
  csDeviceN,
  csPattern
};

class GfxColorSpace {
public:

  GfxColorSpace();
  virtual ~GfxColorSpace();
  virtual GfxColorSpace *copy() = 0;
  virtual GfxColorSpaceMode getMode() = 0;

  // Construct a color space.  Returns NULL if unsuccessful.
  static GfxColorSpace *parse(Object *csObj);

  // Convert to gray, RGB, or CMYK.
  virtual void getGray(GfxColor *color, GfxGray *gray) = 0;
  virtual void getRGB(GfxColor *color, GfxRGB *rgb) = 0;
  virtual void getCMYK(GfxColor *color, GfxCMYK *cmyk) = 0;

  // Return the number of color components.
  virtual int getNComps() = 0;

  // Get this color space's default color.
  virtual void getDefaultColor(GfxColor *color) = 0;

  // Return the default ranges for each component, assuming an image
  // with a max pixel value of <maxImgPixel>.
  virtual void getDefaultRanges(double *decodeLow, double *decodeRange,
				int maxImgPixel);

  // Returns true if painting operations in this color space never
  // mark the page (e.g., the "None" colorant).
  virtual GBool isNonMarking() { return gFalse; }

  // Return the number of color space modes
  static int getNumColorSpaceModes();

  // Return the name of the <idx>th color space mode.
  static char *getColorSpaceModeName(int idx);

private:
};

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

class GfxDeviceGrayColorSpace: public GfxColorSpace {
public:

  GfxDeviceGrayColorSpace();
  virtual ~GfxDeviceGrayColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csDeviceGray; }

  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);

private:
};

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

class GfxCalGrayColorSpace: public GfxColorSpace {
public:

  GfxCalGrayColorSpace();
  virtual ~GfxCalGrayColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csCalGray; }

  // Construct a CalGray 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);

  // CalGray-specific access.
  double getWhiteX() { return whiteX; }
  double getWhiteY() { return whiteY; }
  double getWhiteZ() { return whiteZ; }
  double getBlackX() { return blackX; }
  double getBlackY() { return blackY; }
  double getBlackZ() { return blackZ; }
  double getGamma() { return gamma; }

private:

  double whiteX, whiteY, whiteZ;    // white point
  double blackX, blackY, blackZ;    // black point
  double gamma;			    // gamma value
};

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

class GfxDeviceRGBColorSpace: public GfxColorSpace {
public:

  GfxDeviceRGBColorSpace();
  virtual ~GfxDeviceRGBColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csDeviceRGB; }

  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 3; }
  virtual void getDefaultColor(GfxColor *color);

private:
};

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

class GfxCalRGBColorSpace: public GfxColorSpace {
public:

  GfxCalRGBColorSpace();
  virtual ~GfxCalRGBColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csCalRGB; }

  // Construct a CalRGB 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 3; }
  virtual void getDefaultColor(GfxColor *color);

  // CalRGB-specific access.
  double getWhiteX() { return whiteX; }
  double getWhiteY() { return whiteY; }
  double getWhiteZ() { return whiteZ; }
  double getBlackX() { return blackX; }
  double getBlackY() { return blackY; }
  double getBlackZ() { return blackZ; }
  double getGammaR() { return gammaR; }
  double getGammaG() { return gammaG; }
  double getGammaB() { return gammaB; }
  double *getMatrix() { return mat; }

private:

  double whiteX, whiteY, whiteZ;    // white point
  double blackX, blackY, blackZ;    // black point
  double gammaR, gammaG, gammaB;    // gamma values
  double mat[9];		    // ABC -> XYZ transform matrix
};

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

class GfxDeviceCMYKColorSpace: public GfxColorSpace {
public:

  GfxDeviceCMYKColorSpace();
  virtual ~GfxDeviceCMYKColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csDeviceCMYK; }

  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 4; }
  virtual void getDefaultColor(GfxColor *color);

private:
};

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

class GfxLabColorSpace: public GfxColorSpace {
public:

  GfxLabColorSpace();
  virtual ~GfxLabColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csLab; }

  // Construct a Lab 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 3; }
  virtual void getDefaultColor(GfxColor *color);

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

  // Lab-specific access.
  double getWhiteX() { return whiteX; }
  double getWhiteY() { return whiteY; }
  double getWhiteZ() { return whiteZ; }
  double getBlackX() { return blackX; }
  double getBlackY() { return blackY; }
  double getBlackZ() { return blackZ; }
  double getAMin() { return aMin; }
  double getAMax() { return aMax; }
  double getBMin() { return bMin; }
  double getBMax() { return bMax; }

private:

  double whiteX, whiteY, whiteZ;    // white point
  double blackX, blackY, blackZ;    // black point
  double aMin, aMax, bMin, bMax;    // range for the a and b components
  double kr, kg, kb;		    // gamut mapping mulitpliers
};

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

class GfxICCBasedColorSpace: public GfxColorSpace {
public:

  GfxICCBasedColorSpace(int nCompsA, GfxColorSpace *altA,
			Ref *iccProfileStreamA);
  virtual ~GfxICCBasedColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csICCBased; }

  // Construct an ICCBased 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 void getDefaultRanges(double *decodeLow, double *decodeRange,
				int maxImgPixel);

  // ICCBased-specific access.
  GfxColorSpace *getAlt() { return alt; }

private:

  int nComps;			// number of color components (1, 3, or 4)
  GfxColorSpace *alt;		// alternate color space
  double rangeMin[4];		// min values for each component
  double rangeMax[4];		// max values for each component
  Ref iccProfileStream;		// the ICC profile
};

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

class GfxIndexedColorSpace: public GfxColorSpace {
public:

  GfxIndexedColorSpace(GfxColorSpace *baseA, int indexHighA);
  virtual ~GfxIndexedColorSpace();
  virtual GfxColorSpace *copy();
  virtual GfxColorSpaceMode getMode() { return csIndexed; }

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