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//========================================================================
//
// GfxState.h
//
// 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 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2009 Koji Otani <sho@bbr.jp>
// Copyright (C) 2009-2011, 2013, 2016-2022, 2024 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2010 Christian Feuersänger <cfeuersaenger@googlemail.com>
// Copyright (C) 2011 Andrea Canciani <ranma42@gmail.com>
// Copyright (C) 2011-2014, 2016, 2020 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2013 Lu Wang <coolwanglu@gmail.com>
// Copyright (C) 2015, 2017, 2020, 2022 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2017, 2019, 2022 Oliver Sander <oliver.sander@tu-dresden.de>
// Copyright (C) 2018 Adam Reichold <adam.reichold@t-online.de>
// Copyright (C) 2020, 2021 Philipp Knechtges <philipp-dev@knechtges.com>
// Copyright (C) 2024 Athul Raj Kollareth <krathul3152@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
//
//========================================================================
#ifndef GFXSTATE_H
#define GFXSTATE_H
#include "poppler-config.h"
#include "poppler_private_export.h"
#include "Object.h"
#include "Function.h"
#include <cassert>
#include <map>
#include <memory>
#include <vector>
class Array;
class Gfx;
class GfxFont;
class PDFRectangle;
class GfxShading;
class OutputDev;
class GfxState;
class GfxResources;
class GfxSeparationColorSpace;
class Matrix
{
public:
double m[6];
void init(double xx, double yx, double xy, double yy, double x0, double y0)
{
m[0] = xx;
m[1] = yx;
m[2] = xy;
m[3] = yy;
m[4] = x0;
m[5] = y0;
}
bool invertTo(Matrix *other) const;
void translate(double tx, double ty);
void scale(double sx, double sy);
void transform(double x, double y, double *tx, double *ty) const;
double determinant() const { return m[0] * m[3] - m[1] * m[2]; }
double norm() const;
};
//------------------------------------------------------------------------
// 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 unsigned char dblToByte(double x)
{
return static_cast<unsigned char>(x * 255.0);
}
static inline double byteToDbl(unsigned char x)
{
return (double)x / (double)255.0;
}
static inline GfxColorComp byteToCol(unsigned char 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 unsigned char colToByte(GfxColorComp x)
{
// 255 * x + 0.5 = 256 * x - x + 0x8000
return (unsigned char)(((x << 8) - x + 0x8000) >> 16);
}
static inline unsigned short colToShort(GfxColorComp x)
{
return (unsigned short)(x);
}
//------------------------------------------------------------------------
// GfxColor
//------------------------------------------------------------------------
#define gfxColorMaxComps funcMaxOutputs
struct GfxColor
{
GfxColorComp c[gfxColorMaxComps];
};
static inline void clearGfxColor(GfxColor *gfxColor)
{
memset(gfxColor->c, 0, sizeof(GfxColorComp) * gfxColorMaxComps);
}
//------------------------------------------------------------------------
// GfxGray
//------------------------------------------------------------------------
typedef GfxColorComp GfxGray;
//------------------------------------------------------------------------
// GfxRGB
//------------------------------------------------------------------------
struct GfxRGB
{
GfxColorComp r, g, b;
bool operator==(GfxRGB other) const { return r == other.r && g == other.g && b == other.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
};
// This shall hold a cmsHPROFILE handle.
// Only use the make_GfxLCMSProfilePtr function to construct this pointer,
// to ensure that the resources are properly released after usage.
typedef std::shared_ptr<void> GfxLCMSProfilePtr;
#ifdef USE_CMS
GfxLCMSProfilePtr POPPLER_PRIVATE_EXPORT make_GfxLCMSProfilePtr(void *profile);
#endif
// wrapper of cmsHTRANSFORM to copy
class GfxColorTransform
{
public:
void doTransform(void *in, void *out, unsigned int size);
// transformA should be a cmsHTRANSFORM
GfxColorTransform(void *transformA, int cmsIntent, unsigned int inputPixelType, unsigned int transformPixelType);
~GfxColorTransform();
GfxColorTransform(const GfxColorTransform &) = delete;
GfxColorTransform &operator=(const GfxColorTransform &) = delete;
int getIntent() const { return cmsIntent; }
int getInputPixelType() const { return inputPixelType; }
int getTransformPixelType() const { return transformPixelType; }
private:
GfxColorTransform() { }
void *transform;
int cmsIntent;
unsigned int inputPixelType;
unsigned int transformPixelType;
};
class POPPLER_PRIVATE_EXPORT GfxColorSpace
{
public:
GfxColorSpace();
virtual ~GfxColorSpace();
GfxColorSpace(const GfxColorSpace &) = delete;
GfxColorSpace &operator=(const GfxColorSpace &other) = delete;
virtual std::unique_ptr<GfxColorSpace> copy() const = 0;
virtual GfxColorSpaceMode getMode() const = 0;
// Construct a color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(GfxResources *res, Object *csObj, OutputDev *out, GfxState *state, int recursion = 0);
// Convert to gray, RGB, or CMYK.
virtual void getGray(const GfxColor *color, GfxGray *gray) const = 0;
virtual void getRGB(const GfxColor *color, GfxRGB *rgb) const = 0;
virtual void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const = 0;
virtual void getDeviceN(const GfxColor *color, GfxColor *deviceN) const = 0;
virtual void getGrayLine(unsigned char * /*in*/, unsigned char * /*out*/, int /*length*/) { error(errInternal, -1, "GfxColorSpace::getGrayLine this should not happen"); }
virtual void getRGBLine(unsigned char * /*in*/, unsigned int * /*out*/, int /*length*/) { error(errInternal, -1, "GfxColorSpace::getRGBLine (first variant) this should not happen"); }
virtual void getRGBLine(unsigned char * /*in*/, unsigned char * /*out*/, int /*length*/) { error(errInternal, -1, "GfxColorSpace::getRGBLine (second variant) this should not happen"); }
virtual void getRGBXLine(unsigned char * /*in*/, unsigned char * /*out*/, int /*length*/) { error(errInternal, -1, "GfxColorSpace::getRGBXLine this should not happen"); }
virtual void getCMYKLine(unsigned char * /*in*/, unsigned char * /*out*/, int /*length*/) { error(errInternal, -1, "GfxColorSpace::getCMYKLine this should not happen"); }
virtual void getDeviceNLine(unsigned char * /*in*/, unsigned char * /*out*/, int /*length*/) { error(errInternal, -1, "GfxColorSpace::getDeviceNLine this should not happen"); }
// create mapping for spot colorants
virtual void createMapping(std::vector<std::unique_ptr<GfxSeparationColorSpace>> *separationList, int maxSepComps);
int *getMapping() const { return mapping; }
// Does this ColorSpace support getRGBLine?
virtual bool useGetRGBLine() const { return false; }
// Does this ColorSpace support getGrayLine?
virtual bool useGetGrayLine() const { return false; }
// Does this ColorSpace support getCMYKLine?
virtual bool useGetCMYKLine() const { return false; }
// Does this ColorSpace support getDeviceNLine?
virtual bool useGetDeviceNLine() const { return false; }
// Return the number of color components.
virtual int getNComps() const = 0;
// Get this color space's default color.
virtual void getDefaultColor(GfxColor *color) const = 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) const;
// Returns true if painting operations in this color space never
// mark the page (e.g., the "None" colorant).
virtual bool isNonMarking() const { return false; }
// Return the color space's overprint mask.
unsigned int getOverprintMask() const { return overprintMask; }
// Return the number of color space modes
static int getNumColorSpaceModes();
// Return the name of the <idx>th color space mode.
static const char *getColorSpaceModeName(int idx);
protected:
unsigned int overprintMask;
int *mapping;
};
//------------------------------------------------------------------------
// GfxDeviceGrayColorSpace
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxDeviceGrayColorSpace : public GfxColorSpace
{
public:
GfxDeviceGrayColorSpace();
~GfxDeviceGrayColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csDeviceGray; }
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
void getGrayLine(unsigned char *in, unsigned char *out, int length) override;
void getRGBLine(unsigned char *in, unsigned int *out, int length) override;
void getRGBLine(unsigned char *in, unsigned char *out, int length) override;
void getRGBXLine(unsigned char *in, unsigned char *out, int length) override;
void getCMYKLine(unsigned char *in, unsigned char *out, int length) override;
void getDeviceNLine(unsigned char *in, unsigned char *out, int length) override;
bool useGetRGBLine() const override { return true; }
bool useGetGrayLine() const override { return true; }
bool useGetCMYKLine() const override { return true; }
bool useGetDeviceNLine() const override { return true; }
int getNComps() const override { return 1; }
void getDefaultColor(GfxColor *color) const override;
private:
};
//------------------------------------------------------------------------
// GfxCalGrayColorSpace
//------------------------------------------------------------------------
class GfxCalGrayColorSpace : public GfxColorSpace
{
public:
GfxCalGrayColorSpace();
~GfxCalGrayColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csCalGray; }
// Construct a CalGray color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(Array *arr, GfxState *state);
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
int getNComps() const override { return 1; }
void getDefaultColor(GfxColor *color) const override;
// CalGray-specific access.
double getWhiteX() const { return whiteX; }
double getWhiteY() const { return whiteY; }
double getWhiteZ() const { return whiteZ; }
double getBlackX() const { return blackX; }
double getBlackY() const { return blackY; }
double getBlackZ() const { return blackZ; }
double getGamma() const { return gamma; }
private:
double whiteX, whiteY, whiteZ; // white point
double blackX, blackY, blackZ; // black point
double gamma; // gamma value
void getXYZ(const GfxColor *color, double *pX, double *pY, double *pZ) const;
#ifdef USE_CMS
std::shared_ptr<GfxColorTransform> transform;
#endif
};
//------------------------------------------------------------------------
// GfxDeviceRGBColorSpace
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxDeviceRGBColorSpace : public GfxColorSpace
{
public:
GfxDeviceRGBColorSpace();
~GfxDeviceRGBColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csDeviceRGB; }
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
void getGrayLine(unsigned char *in, unsigned char *out, int length) override;
void getRGBLine(unsigned char *in, unsigned int *out, int length) override;
void getRGBLine(unsigned char *in, unsigned char *out, int length) override;
void getRGBXLine(unsigned char *in, unsigned char *out, int length) override;
void getCMYKLine(unsigned char *in, unsigned char *out, int length) override;
void getDeviceNLine(unsigned char *in, unsigned char *out, int length) override;
bool useGetRGBLine() const override { return true; }
bool useGetGrayLine() const override { return true; }
bool useGetCMYKLine() const override { return true; }
bool useGetDeviceNLine() const override { return true; }
int getNComps() const override { return 3; }
void getDefaultColor(GfxColor *color) const override;
private:
};
//------------------------------------------------------------------------
// GfxCalRGBColorSpace
//------------------------------------------------------------------------
class GfxCalRGBColorSpace : public GfxColorSpace
{
public:
GfxCalRGBColorSpace();
~GfxCalRGBColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csCalRGB; }
// Construct a CalRGB color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(Array *arr, GfxState *state);
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
int getNComps() const override { return 3; }
void getDefaultColor(GfxColor *color) const override;
// CalRGB-specific access.
double getWhiteX() const { return whiteX; }
double getWhiteY() const { return whiteY; }
double getWhiteZ() const { return whiteZ; }
double getBlackX() const { return blackX; }
double getBlackY() const { return blackY; }
double getBlackZ() const { return blackZ; }
double getGammaR() const { return gammaR; }
double getGammaG() const { return gammaG; }
double getGammaB() const { return gammaB; }
const double *getMatrix() const { 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
void getXYZ(const GfxColor *color, double *pX, double *pY, double *pZ) const;
#ifdef USE_CMS
std::shared_ptr<GfxColorTransform> transform;
#endif
};
//------------------------------------------------------------------------
// GfxDeviceCMYKColorSpace
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxDeviceCMYKColorSpace : public GfxColorSpace
{
public:
GfxDeviceCMYKColorSpace();
~GfxDeviceCMYKColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csDeviceCMYK; }
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
void getRGBLine(unsigned char *in, unsigned int *out, int length) override;
void getRGBLine(unsigned char *, unsigned char *out, int length) override;
void getRGBXLine(unsigned char *in, unsigned char *out, int length) override;
void getCMYKLine(unsigned char *in, unsigned char *out, int length) override;
void getDeviceNLine(unsigned char *in, unsigned char *out, int length) override;
bool useGetRGBLine() const override { return true; }
bool useGetCMYKLine() const override { return true; }
bool useGetDeviceNLine() const override { return true; }
int getNComps() const override { return 4; }
void getDefaultColor(GfxColor *color) const override;
private:
};
//------------------------------------------------------------------------
// GfxLabColorSpace
//------------------------------------------------------------------------
class GfxLabColorSpace : public GfxColorSpace
{
public:
GfxLabColorSpace();
~GfxLabColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csLab; }
// Construct a Lab color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(Array *arr, GfxState *state);
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
int getNComps() const override { return 3; }
void getDefaultColor(GfxColor *color) const override;
void getDefaultRanges(double *decodeLow, double *decodeRange, int maxImgPixel) const override;
// Lab-specific access.
double getWhiteX() const { return whiteX; }
double getWhiteY() const { return whiteY; }
double getWhiteZ() const { return whiteZ; }
double getBlackX() const { return blackX; }
double getBlackY() const { return blackY; }
double getBlackZ() const { return blackZ; }
double getAMin() const { return aMin; }
double getAMax() const { return aMax; }
double getBMin() const { return bMin; }
double getBMax() const { 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
void getXYZ(const GfxColor *color, double *pX, double *pY, double *pZ) const;
#ifdef USE_CMS
std::shared_ptr<GfxColorTransform> transform;
#endif
};
//------------------------------------------------------------------------
// GfxICCBasedColorSpace
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxICCBasedColorSpace : public GfxColorSpace
{
public:
GfxICCBasedColorSpace(int nCompsA, std::unique_ptr<GfxColorSpace> &&altA, const Ref *iccProfileStreamA);
~GfxICCBasedColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csICCBased; }
std::unique_ptr<GfxICCBasedColorSpace> copyAsOwnType() const;
// Construct an ICCBased color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(Array *arr, OutputDev *out, GfxState *state, int recursion);
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
void getRGBLine(unsigned char *in, unsigned int *out, int length) override;
void getRGBLine(unsigned char *in, unsigned char *out, int length) override;
void getRGBXLine(unsigned char *in, unsigned char *out, int length) override;
void getCMYKLine(unsigned char *in, unsigned char *out, int length) override;
void getDeviceNLine(unsigned char *in, unsigned char *out, int length) override;
bool useGetRGBLine() const override;
bool useGetCMYKLine() const override;
bool useGetDeviceNLine() const override;
int getNComps() const override { return nComps; }
void getDefaultColor(GfxColor *color) const override;
void getDefaultRanges(double *decodeLow, double *decodeRange, int maxImgPixel) const override;
// ICCBased-specific access.
GfxColorSpace *getAlt() { return alt.get(); }
Ref getRef() { return iccProfileStream; }
#ifdef USE_CMS
char *getPostScriptCSA();
void buildTransforms(GfxState *state);
void setProfile(GfxLCMSProfilePtr &profileA) { profile = profileA; }
GfxLCMSProfilePtr getProfile() { return profile; }
#endif
private:
int nComps; // number of color components (1, 3, or 4)
std::unique_ptr<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
#ifdef USE_CMS
GfxLCMSProfilePtr profile;
char *psCSA;
int getIntent() { return (transform != nullptr) ? transform->getIntent() : 0; }
std::shared_ptr<GfxColorTransform> transform;
std::shared_ptr<GfxColorTransform> lineTransform; // color transform for line
mutable std::map<unsigned int, unsigned int> cmsCache;
#endif
};
//------------------------------------------------------------------------
// GfxIndexedColorSpace
//------------------------------------------------------------------------
class GfxIndexedColorSpace : public GfxColorSpace
{
public:
GfxIndexedColorSpace(std::unique_ptr<GfxColorSpace> &&baseA, int indexHighA);
~GfxIndexedColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csIndexed; }
// Construct an Indexed color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(GfxResources *res, Array *arr, OutputDev *out, GfxState *state, int recursion);
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
void getRGBLine(unsigned char *in, unsigned int *out, int length) override;
void getRGBLine(unsigned char *in, unsigned char *out, int length) override;
void getRGBXLine(unsigned char *in, unsigned char *out, int length) override;
void getCMYKLine(unsigned char *in, unsigned char *out, int length) override;
void getDeviceNLine(unsigned char *in, unsigned char *out, int length) override;
bool useGetRGBLine() const override { return true; }
bool useGetCMYKLine() const override { return true; }
bool useGetDeviceNLine() const override { return true; }
int getNComps() const override { return 1; }
void getDefaultColor(GfxColor *color) const override;
void getDefaultRanges(double *decodeLow, double *decodeRange, int maxImgPixel) const override;
// Indexed-specific access.
GfxColorSpace *getBase() { return base.get(); }
int getIndexHigh() const { return indexHigh; }
unsigned char *getLookup() { return lookup; }
GfxColor *mapColorToBase(const GfxColor *color, GfxColor *baseColor) const;
unsigned int getOverprintMask() const { return base->getOverprintMask(); }
void createMapping(std::vector<std::unique_ptr<GfxSeparationColorSpace>> *separationList, int maxSepComps) override { base->createMapping(separationList, maxSepComps); }
private:
std::unique_ptr<GfxColorSpace> base; // base color space
int indexHigh; // max pixel value
unsigned char *lookup; // lookup table
};
//------------------------------------------------------------------------
// GfxSeparationColorSpace
//------------------------------------------------------------------------
class GfxSeparationColorSpace : public GfxColorSpace
{
public:
GfxSeparationColorSpace(GooString *nameA, std::unique_ptr<GfxColorSpace> &&altA, Function *funcA);
~GfxSeparationColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csSeparation; }
std::unique_ptr<GfxSeparationColorSpace> copyAsOwnType() const;
// Construct a Separation color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(GfxResources *res, Array *arr, OutputDev *out, GfxState *state, int recursion);
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
void createMapping(std::vector<std::unique_ptr<GfxSeparationColorSpace>> *separationList, int maxSepComps) override;
int getNComps() const override { return 1; }
void getDefaultColor(GfxColor *color) const override;
bool isNonMarking() const override { return nonMarking; }
// Separation-specific access.
const GooString *getName() const { return name; }
GfxColorSpace *getAlt() { return alt.get(); }
const Function *getFunc() const { return func; }
private:
GfxSeparationColorSpace(GooString *nameA, std::unique_ptr<GfxColorSpace> &&altA, Function *funcA, bool nonMarkingA, unsigned int overprintMaskA, int *mappingA);
GooString *name; // colorant name
std::unique_ptr<GfxColorSpace> alt; // alternate color space
Function *func; // tint transform (into alternate color space)
bool nonMarking;
};
//------------------------------------------------------------------------
// GfxDeviceNColorSpace
//------------------------------------------------------------------------
class GfxDeviceNColorSpace : public GfxColorSpace
{
public:
GfxDeviceNColorSpace(int nCompsA, std::vector<std::string> &&namesA, std::unique_ptr<GfxColorSpace> &&alt, Function *func, std::vector<std::unique_ptr<GfxSeparationColorSpace>> *sepsCS);
~GfxDeviceNColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csDeviceN; }
// Construct a DeviceN color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(GfxResources *res, Array *arr, OutputDev *out, GfxState *state, int recursion);
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
void createMapping(std::vector<std::unique_ptr<GfxSeparationColorSpace>> *separationList, int maxSepComps) override;
int getNComps() const override { return nComps; }
void getDefaultColor(GfxColor *color) const override;
bool isNonMarking() const override { return nonMarking; }
// DeviceN-specific access.
const std::string &getColorantName(int i) const { return names[i]; }
GfxColorSpace *getAlt() { return alt.get(); }
const Function *getTintTransformFunc() const { return func; }
private:
GfxDeviceNColorSpace(int nCompsA, const std::vector<std::string> &namesA, std::unique_ptr<GfxColorSpace> &&alt, Function *func, std::vector<std::unique_ptr<GfxSeparationColorSpace>> *sepsCSA, int *mappingA, bool nonMarkingA,
unsigned int overprintMaskA);
const int nComps; // number of components
const std::vector<std::string> names; // colorant names
std::unique_ptr<GfxColorSpace> alt; // alternate color space
Function *func; // tint transform (into alternate color space)
bool nonMarking;
std::vector<std::unique_ptr<GfxSeparationColorSpace>> *sepsCS; // list of separation cs for spot colorants;
};
//------------------------------------------------------------------------
// GfxPatternColorSpace
//------------------------------------------------------------------------
class GfxPatternColorSpace : public GfxColorSpace
{
public:
explicit GfxPatternColorSpace(std::unique_ptr<GfxColorSpace> &&underA);
~GfxPatternColorSpace() override;
std::unique_ptr<GfxColorSpace> copy() const override;
GfxColorSpaceMode getMode() const override { return csPattern; }
// Construct a Pattern color space. Returns nullptr if unsuccessful.
static std::unique_ptr<GfxColorSpace> parse(GfxResources *res, Array *arr, OutputDev *out, GfxState *state, int recursion);
void getGray(const GfxColor *color, GfxGray *gray) const override;
void getRGB(const GfxColor *color, GfxRGB *rgb) const override;
void getCMYK(const GfxColor *color, GfxCMYK *cmyk) const override;
void getDeviceN(const GfxColor *color, GfxColor *deviceN) const override;
int getNComps() const override { return 0; }
void getDefaultColor(GfxColor *color) const override;
// Pattern-specific access.
GfxColorSpace *getUnder() { return under.get(); }
private:
std::unique_ptr<GfxColorSpace> under; // underlying color space (for uncolored patterns)
};
//------------------------------------------------------------------------
// GfxPattern
//------------------------------------------------------------------------
class GfxPattern
{
public:
GfxPattern(int typeA, int patternRefNumA);
virtual ~GfxPattern();
GfxPattern(const GfxPattern &) = delete;
GfxPattern &operator=(const GfxPattern &other) = delete;
static GfxPattern *parse(GfxResources *res, Object *obj, OutputDev *out, GfxState *state, int patternRefNum);
virtual GfxPattern *copy() const = 0;
int getType() const { return type; }
int getPatternRefNum() const { return patternRefNum; }
private:
int type;
int patternRefNum;
};
//------------------------------------------------------------------------
// GfxTilingPattern
//------------------------------------------------------------------------
class GfxTilingPattern : public GfxPattern
{
public:
static GfxTilingPattern *parse(Object *patObj, int patternRefNum);
~GfxTilingPattern() override;
GfxPattern *copy() const override;
int getPaintType() const { return paintType; }
int getTilingType() const { return tilingType; }
const double *getBBox() const { return bbox; }
double getXStep() const { return xStep; }
double getYStep() const { return yStep; }
Dict *getResDict() { return resDict.isDict() ? resDict.getDict() : (Dict *)nullptr; }
const double *getMatrix() const { return matrix; }
Object *getContentStream() { return &contentStream; }
private:
GfxTilingPattern(int paintTypeA, int tilingTypeA, const double *bboxA, double xStepA, double yStepA, const Object *resDictA, const double *matrixA, const Object *contentStreamA, int patternRefNumA);
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(GfxResources *res, Object *patObj, OutputDev *out, GfxState *state, int patternRefNum);
~GfxShadingPattern() override;
GfxPattern *copy() const override;
GfxShading *getShading() { return shading; }
const double *getMatrix() const { return matrix; }
private:
GfxShadingPattern(GfxShading *shadingA, const double *matrixA, int patternRefNumA);
GfxShading *shading;
double matrix[6];
};
//------------------------------------------------------------------------
// GfxShading
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxShading
{
public:
enum ShadingType
{
FunctionBasedShading = 1,
AxialShading,
RadialShading,
FreeFormGouraudShadedTriangleMesh,
LatticeFormGouraudShadedTriangleMesh,
CoonsPatchMesh,
TensorProductPatchMesh
};
explicit GfxShading(int typeA);
explicit GfxShading(const GfxShading *shading);
virtual ~GfxShading();
GfxShading(const GfxShading &) = delete;
GfxShading &operator=(const GfxShading &other) = delete;
static GfxShading *parse(GfxResources *res, Object *obj, OutputDev *out, GfxState *state);
virtual GfxShading *copy() const = 0;
ShadingType getType() const { return type; }
GfxColorSpace *getColorSpace() { return colorSpace.get(); }
const GfxColor *getBackground() const { return &background; }
bool getHasBackground() const { return hasBackground; }
void getBBox(double *xMinA, double *yMinA, double *xMaxA, double *yMaxA) const
{
*xMinA = bbox_xMin;
*yMinA = bbox_yMin;
*xMaxA = bbox_xMax;
*yMaxA = bbox_yMax;
}
bool getHasBBox() const { return hasBBox; }
protected:
virtual bool init(GfxResources *res, Dict *dict, OutputDev *out, GfxState *state);
ShadingType type;
bool hasBackground;
bool hasBBox;
std::unique_ptr<GfxColorSpace> colorSpace;
GfxColor background;
double bbox_xMin, bbox_yMin, bbox_xMax, bbox_yMax;
};
//------------------------------------------------------------------------
// GfxUnivariateShading
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxUnivariateShading : public GfxShading
{
public:
GfxUnivariateShading(int typeA, double t0A, double t1A, std::vector<std::unique_ptr<Function>> &&funcsA, bool extend0A, bool extend1A);
explicit GfxUnivariateShading(const GfxUnivariateShading *shading);
~GfxUnivariateShading() override;
double getDomain0() const { return t0; }
double getDomain1() const { return t1; }
bool getExtend0() const { return extend0; }
bool getExtend1() const { return extend1; }
int getNFuncs() const { return funcs.size(); }
const Function *getFunc(int i) const { return funcs[i].get(); }
// returns the nComps of the shading
// i.e. how many positions of color have been set
int getColor(double t, GfxColor *color);
void setupCache(const Matrix *ctm, double xMin, double yMin, double xMax, double yMax);
virtual void getParameterRange(double *lower, double *upper, double xMin, double yMin, double xMax, double yMax) = 0;
virtual double getDistance(double sMin, double sMax) const = 0;
protected:
bool init(GfxResources *res, Dict *dict, OutputDev *out, GfxState *state) override;
private:
double t0, t1;
std::vector<std::unique_ptr<Function>> funcs;
bool extend0, extend1;
int cacheSize, lastMatch;
double *cacheBounds;
double *cacheCoeff;
double *cacheValues;
};
//------------------------------------------------------------------------
// GfxFunctionShading
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxFunctionShading : public GfxShading
{
public:
GfxFunctionShading(double x0A, double y0A, double x1A, double y1A, const double *matrixA, std::vector<std::unique_ptr<Function>> &&funcsA);
explicit GfxFunctionShading(const GfxFunctionShading *shading);
~GfxFunctionShading() override;
static GfxFunctionShading *parse(GfxResources *res, Dict *dict, OutputDev *out, GfxState *state);
GfxShading *copy() const override;
void getDomain(double *x0A, double *y0A, double *x1A, double *y1A) const
{
*x0A = x0;
*y0A = y0;
*x1A = x1;
*y1A = y1;
}
const double *getMatrix() const { return matrix; }
int getNFuncs() const { return funcs.size(); }
const Function *getFunc(int i) const { return funcs[i].get(); }
void getColor(double x, double y, GfxColor *color) const;
protected:
bool init(GfxResources *res, Dict *dict, OutputDev *out, GfxState *state) override;
private:
double x0, y0, x1, y1;
double matrix[6];
std::vector<std::unique_ptr<Function>> funcs;
};
//------------------------------------------------------------------------
// GfxAxialShading
//------------------------------------------------------------------------
class GfxAxialShading : public GfxUnivariateShading
{
public:
GfxAxialShading(double x0A, double y0A, double x1A, double y1A, double t0A, double t1A, std::vector<std::unique_ptr<Function>> &&funcsA, bool extend0A, bool extend1A);
explicit GfxAxialShading(const GfxAxialShading *shading);
~GfxAxialShading() override;
static GfxAxialShading *parse(GfxResources *res, Dict *dict, OutputDev *out, GfxState *state);
GfxShading *copy() const override;
void getCoords(double *x0A, double *y0A, double *x1A, double *y1A) const
{
*x0A = x0;
*y0A = y0;
*x1A = x1;
*y1A = y1;
}
void getParameterRange(double *lower, double *upper, double xMin, double yMin, double xMax, double yMax) override;
double getDistance(double sMin, double sMax) const override;
private:
double x0, y0, x1, y1;
};
//------------------------------------------------------------------------
// GfxRadialShading
//------------------------------------------------------------------------
class GfxRadialShading : public GfxUnivariateShading
{
public:
GfxRadialShading(double x0A, double y0A, double r0A, double x1A, double y1A, double r1A, double t0A, double t1A, std::vector<std::unique_ptr<Function>> &&funcsA, bool extend0A, bool extend1A);
explicit GfxRadialShading(const GfxRadialShading *shading);
~GfxRadialShading() override;
static GfxRadialShading *parse(GfxResources *res, Dict *dict, OutputDev *out, GfxState *state);
GfxShading *copy() const override;
void getCoords(double *x0A, double *y0A, double *r0A, double *x1A, double *y1A, double *r1A) const
{
*x0A = x0;
*y0A = y0;
*r0A = r0;
*x1A = x1;
*y1A = y1;
*r1A = r1;
}
void getParameterRange(double *lower, double *upper, double xMin, double yMin, double xMax, double yMax) override;
double getDistance(double sMin, double sMax) const override;
private:
double x0, y0, r0, x1, y1, r1;
};
//------------------------------------------------------------------------
// GfxGouraudTriangleShading
//------------------------------------------------------------------------
struct GfxGouraudVertex
{
double x, y;
GfxColor color;
};
class POPPLER_PRIVATE_EXPORT GfxGouraudTriangleShading : public GfxShading
{
public:
GfxGouraudTriangleShading(int typeA, GfxGouraudVertex *verticesA, int nVerticesA, int (*trianglesA)[3], int nTrianglesA, std::vector<std::unique_ptr<Function>> &&funcsA);
explicit GfxGouraudTriangleShading(const GfxGouraudTriangleShading *shading);
~GfxGouraudTriangleShading() override;
static GfxGouraudTriangleShading *parse(GfxResources *res, int typeA, Dict *dict, Stream *str, OutputDev *out, GfxState *state);
GfxShading *copy() const override;
int getNTriangles() const { return nTriangles; }
bool isParameterized() const { return !funcs.empty(); }
/**
* @precondition isParameterized() == true
*/
double getParameterDomainMin() const
{
assert(isParameterized());
return funcs[0]->getDomainMin(0);
}
/**
* @precondition isParameterized() == true
*/
double getParameterDomainMax() const
{
assert(isParameterized());
return funcs[0]->getDomainMax(0);
}
/**
* @precondition isParameterized() == false
*/
void getTriangle(int i, double *x0, double *y0, GfxColor *color0, double *x1, double *y1, GfxColor *color1, double *x2, double *y2, GfxColor *color2);
/**
* Variant for functions.
*
* @precondition isParameterized() == true
*/
void getTriangle(int i, double *x0, double *y0, double *color0, double *x1, double *y1, double *color1, double *x2, double *y2, double *color2);
void getParameterizedColor(double t, GfxColor *color) const;
protected:
bool init(GfxResources *res, Dict *dict, OutputDev *out, GfxState *state) override;
private:
GfxGouraudVertex *vertices;
int nVertices;
int (*triangles)[3];
int nTriangles;
std::vector<std::unique_ptr<Function>> funcs;
};
//------------------------------------------------------------------------
// GfxPatchMeshShading
//------------------------------------------------------------------------
/**
* A tensor product cubic bezier patch consisting of 4x4 points and 4 color
* values.
*
* See the Shading Type 7 specifications. Note that Shading Type 6 is also
* represented using GfxPatch.
*/
struct GfxPatch
{
/**
* Represents a single color value for the patch.
*/
struct ColorValue
{
/**
* For parameterized patches, only element 0 is valid; it contains
* the single parameter.
*
* For non-parameterized patches, c contains all color components
* as decoded from the input stream. In this case, you will need to
* use dblToCol() before assigning them to GfxColor.
*/
double c[gfxColorMaxComps];
};
double x[4][4];
double y[4][4];
ColorValue color[2][2];
};
class POPPLER_PRIVATE_EXPORT GfxPatchMeshShading : public GfxShading
{
public:
GfxPatchMeshShading(int typeA, GfxPatch *patchesA, int nPatchesA, std::vector<std::unique_ptr<Function>> &&funcsA);
explicit GfxPatchMeshShading(const GfxPatchMeshShading *shading);
~GfxPatchMeshShading() override;
static GfxPatchMeshShading *parse(GfxResources *res, int typeA, Dict *dict, Stream *str, OutputDev *out, GfxState *state);
GfxShading *copy() const override;
int getNPatches() const { return nPatches; }
const GfxPatch *getPatch(int i) const { return &patches[i]; }
bool isParameterized() const { return !funcs.empty(); }
/**
* @precondition isParameterized() == true
*/
double getParameterDomainMin() const
{
assert(isParameterized());
return funcs[0]->getDomainMin(0);
}
/**
* @precondition isParameterized() == true
*/
double getParameterDomainMax() const
{
assert(isParameterized());
return funcs[0]->getDomainMax(0);
}
void getParameterizedColor(double t, GfxColor *color) const;
protected:
bool init(GfxResources *res, Dict *dict, OutputDev *out, GfxState *state) override;
private:
GfxPatch *patches;
int nPatches;
std::vector<std::unique_ptr<Function>> funcs;
};
//------------------------------------------------------------------------
// GfxImageColorMap
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxImageColorMap
{
public:
// Constructor.
GfxImageColorMap(int bitsA, Object *decode, std::unique_ptr<GfxColorSpace> &&colorSpaceA);
// Destructor.
~GfxImageColorMap();
GfxImageColorMap(const GfxImageColorMap &) = delete;
GfxImageColorMap &operator=(const GfxImageColorMap &) = delete;
// Return a copy of this color map.
GfxImageColorMap *copy() const { return new GfxImageColorMap(this); }
// Is color map valid?
bool isOk() const { return ok; }
// Get the color space.
GfxColorSpace *getColorSpace() { return colorSpace.get(); }
// Get stream decoding info.
int getNumPixelComps() const { return nComps; }
int getBits() const { return bits; }
// Get decode table.
double getDecodeLow(int i) const { return decodeLow[i]; }
double getDecodeHigh(int i) const { return decodeLow[i] + decodeRange[i]; }
bool useRGBLine() const { return (colorSpace2 && colorSpace2->useGetRGBLine()) || (!colorSpace2 && colorSpace->useGetRGBLine()); }
bool useCMYKLine() const { return (colorSpace2 && colorSpace2->useGetCMYKLine()) || (!colorSpace2 && colorSpace->useGetCMYKLine()); }
bool useDeviceNLine() const { return (colorSpace2 && colorSpace2->useGetDeviceNLine()) || (!colorSpace2 && colorSpace->useGetDeviceNLine()); }
// Convert an image pixel to a color.
void getGray(const unsigned char *x, GfxGray *gray);
void getRGB(const unsigned char *x, GfxRGB *rgb);
void getRGBLine(unsigned char *in, unsigned int *out, int length);
void getRGBLine(unsigned char *in, unsigned char *out, int length);
void getRGBXLine(unsigned char *in, unsigned char *out, int length);
void getGrayLine(unsigned char *in, unsigned char *out, int length);
void getCMYKLine(unsigned char *in, unsigned char *out, int length);
void getDeviceNLine(unsigned char *in, unsigned char *out, int length);
void getCMYK(const unsigned char *x, GfxCMYK *cmyk);
void getDeviceN(const unsigned char *x, GfxColor *deviceN);
void getColor(const unsigned char *x, GfxColor *color);
// Matte color ops
void setMatteColor(const GfxColor *color)
{
useMatte = true;
matteColor = *color;
}
const GfxColor *getMatteColor() const { return (useMatte) ? &matteColor : nullptr; }
private:
explicit GfxImageColorMap(const GfxImageColorMap *colorMap);
std::unique_ptr<GfxColorSpace> colorSpace; // the image color space
int bits; // bits per component
int nComps; // number of components in a pixel
GfxColorSpace *colorSpace2; // secondary color space
int nComps2; // number of components in colorSpace2
GfxColorComp * // lookup table
lookup[gfxColorMaxComps];
GfxColorComp * // optimized case lookup table
lookup2[gfxColorMaxComps];
unsigned char *byte_lookup;
double // minimum values for each component
decodeLow[gfxColorMaxComps];
double // max - min value for each component
decodeRange[gfxColorMaxComps];
bool useMatte;
GfxColor matteColor;
bool ok;
};
//------------------------------------------------------------------------
// GfxSubpath and GfxPath
//------------------------------------------------------------------------
class GfxSubpath
{
public:
// Constructor.
GfxSubpath(double x1, double y1);
// Destructor.
~GfxSubpath();
GfxSubpath(const GfxSubpath &) = delete;
GfxSubpath &operator=(const GfxSubpath &) = delete;
// Copy.
GfxSubpath *copy() const { return new GfxSubpath(this); }
// Get points.
int getNumPoints() const { return n; }
double getX(int i) const { return x[i]; }
double getY(int i) const { return y[i]; }
bool getCurve(int i) const { return curve[i]; }
void setX(int i, double a) { x[i] = a; }
void setY(int i, double a) { y[i] = a; }
// Get last point.
double getLastX() const { return x[n - 1]; }
double getLastY() const { return y[n - 1]; }
// Add a line segment.
void lineTo(double x1, double y1);
// Add a Bezier curve.
void curveTo(double x1, double y1, double x2, double y2, double x3, double y3);
// Close the subpath.
void close();
bool isClosed() const { return closed; }
// Add (<dx>, <dy>) to each point in the subpath.
void offset(double dx, double dy);
private:
double *x, *y; // points
bool *curve; // curve[i] => point i is a control point
// for a Bezier curve
int n; // number of points
int size; // size of x/y arrays
bool closed; // set if path is closed
explicit GfxSubpath(const GfxSubpath *subpath);
};
class POPPLER_PRIVATE_EXPORT GfxPath
{
public:
// Constructor.
GfxPath();
// Destructor.
~GfxPath();
GfxPath(const GfxPath &) = delete;
GfxPath &operator=(const GfxPath &) = delete;
// Copy.
GfxPath *copy() const { return new GfxPath(justMoved, firstX, firstY, subpaths, n, size); }
// Is there a current point?
bool isCurPt() const { return n > 0 || justMoved; }
// Is the path non-empty, i.e., is there at least one segment?
bool isPath() const { return n > 0; }
// Get subpaths.
int getNumSubpaths() const { return n; }
GfxSubpath *getSubpath(int i) { return subpaths[i]; }
const GfxSubpath *getSubpath(int i) const { return subpaths[i]; }
// Get last point on last subpath.
double getLastX() const { return subpaths[n - 1]->getLastX(); }
double getLastY() const { return subpaths[n - 1]->getLastY(); }
// Move the current point.
void moveTo(double x, double y);
// Add a segment to the last subpath.
void lineTo(double x, double y);
// Add a Bezier curve to the last subpath
void curveTo(double x1, double y1, double x2, double y2, double x3, double y3);
// Close the last subpath.
void close();
// Append <path> to <this>.
void append(GfxPath *path);
// Add (<dx>, <dy>) to each point in the path.
void offset(double dx, double dy);
private:
bool justMoved; // set if a new subpath was just started
double firstX, firstY; // first point in new subpath
GfxSubpath **subpaths; // subpaths
int n; // number of subpaths
int size; // size of subpaths array
GfxPath(bool justMoved1, double firstX1, double firstY1, GfxSubpath **subpaths1, int n1, int size1);
};
//------------------------------------------------------------------------
// GfxState
//------------------------------------------------------------------------
class POPPLER_PRIVATE_EXPORT GfxState
{
public:
/**
* When GfxState::getReusablePath() is invoked, the currently active
* path is taken per reference and its coordinates can be re-edited.
*
* A ReusablePathIterator is intended to reduce overhead when the same
* path type is used a lot of times, only with different coordinates. It
* allows just to update the coordinates (occurring in the same order as
* in the original path).
*/
class ReusablePathIterator
{
public:
/**
* Creates the ReusablePathIterator. This should only be done from
* GfxState::getReusablePath().
*
* @param path the path as it is used so far. Changing this path,
* deleting it or starting a new path from scratch will most likely
* invalidate the iterator (and may cause serious problems). Make
* sure the path's memory structure is not changed during the
* lifetime of the ReusablePathIterator.
*/
explicit ReusablePathIterator(GfxPath *path);
/**
* Returns true if and only if the current iterator position is
* beyond the last valid point.
*
* A call to setCoord() will be undefined.
*/
bool isEnd() const;
/**
* Advances the iterator.
*/
void next();
/**
* Updates the coordinates associated to the current iterator
* position.
*/
void setCoord(double x, double y);
/**
* Resets the iterator.
*/
void reset();
private:
GfxPath *path;
int subPathOff;
int coordOff;
int numCoords;
GfxSubpath *curSubPath;
};
enum LineJoinStyle
{
LineJoinMitre,
LineJoinRound,
LineJoinBevel
};
enum LineCapStyle
{
LineCapButt,
LineCapRound,
LineCapProjecting
};
// Construct a default GfxState, for a device with resolution <hDPI>
// x <vDPI>, page box <pageBox>, page rotation <rotateA>, and
// coordinate system specified by <upsideDown>.
GfxState(double hDPIA, double vDPIA, const PDFRectangle *pageBox, int rotateA, bool upsideDown);
// Destructor.
~GfxState();
GfxState(const GfxState &) = delete;
GfxState &operator=(const GfxState &) = delete;
// Copy.
GfxState *copy(bool copyPath = false) const { return new GfxState(this, copyPath); }
// Accessors.
double getHDPI() const { return hDPI; }
double getVDPI() const { return vDPI; }
const double *getCTM() const { return ctm; }
void getCTM(Matrix *m) const { memcpy(m->m, ctm, sizeof m->m); }
double getX1() const { return px1; }
double getY1() const { return py1; }
double getX2() const { return px2; }
double getY2() const { return py2; }
double getPageWidth() const { return pageWidth; }
double getPageHeight() const { return pageHeight; }
int getRotate() const { return rotate; }
const GfxColor *getFillColor() const { return &fillColor; }
const GfxColor *getStrokeColor() const { return &strokeColor; }
void getFillGray(GfxGray *gray) { fillColorSpace->getGray(&fillColor, gray); }
void getStrokeGray(GfxGray *gray) { strokeColorSpace->getGray(&strokeColor, gray); }
void getFillRGB(GfxRGB *rgb) const { fillColorSpace->getRGB(&fillColor, rgb); }
void getStrokeRGB(GfxRGB *rgb) const { strokeColorSpace->getRGB(&strokeColor, rgb); }
void getFillCMYK(GfxCMYK *cmyk) { fillColorSpace->getCMYK(&fillColor, cmyk); }
void getFillDeviceN(GfxColor *deviceN) { fillColorSpace->getDeviceN(&fillColor, deviceN); }
void getStrokeCMYK(GfxCMYK *cmyk) { strokeColorSpace->getCMYK(&strokeColor, cmyk); }
void getStrokeDeviceN(GfxColor *deviceN) { strokeColorSpace->getDeviceN(&strokeColor, deviceN); }
GfxColorSpace *getFillColorSpace() { return fillColorSpace.get(); }
GfxColorSpace *getStrokeColorSpace() { return strokeColorSpace.get(); }
GfxPattern *getFillPattern() { return fillPattern; }
GfxPattern *getStrokePattern() { return strokePattern; }
GfxBlendMode getBlendMode() const { return blendMode; }
double getFillOpacity() const { return fillOpacity; }
double getStrokeOpacity() const { return strokeOpacity; }
bool getFillOverprint() const { return fillOverprint; }
bool getStrokeOverprint() const { return strokeOverprint; }
int getOverprintMode() const { return overprintMode; }
Function **getTransfer() { return transfer; }
double getLineWidth() const { return lineWidth; }
const std::vector<double> &getLineDash(double *start)
{
*start = lineDashStart;
return lineDash;
}
int getFlatness() const { return flatness; }
LineJoinStyle getLineJoin() const { return lineJoin; }
LineCapStyle getLineCap() const { return lineCap; }
double getMiterLimit() const { return miterLimit; }
bool getStrokeAdjust() const { return strokeAdjust; }
bool getAlphaIsShape() const { return alphaIsShape; }
bool getTextKnockout() const { return textKnockout; }
const std::shared_ptr<GfxFont> &getFont() const { return font; }
double getFontSize() const { return fontSize; }
const double *getTextMat() const { return textMat; }
double getCharSpace() const { return charSpace; }
double getWordSpace() const { return wordSpace; }
double getHorizScaling() const { return horizScaling; }
double getLeading() const { return leading; }
double getRise() const { return rise; }
int getRender() const { return render; }
const char *getRenderingIntent() const { return renderingIntent; }
const GfxPath *getPath() const { return path; }
void setPath(GfxPath *pathA);
double getCurX() const { return curX; }
double getCurY() const { return curY; }
void getClipBBox(double *xMin, double *yMin, double *xMax, double *yMax) const
{
*xMin = clipXMin;
*yMin = clipYMin;
*xMax = clipXMax;
*yMax = clipYMax;
}
void getUserClipBBox(double *xMin, double *yMin, double *xMax, double *yMax) const;
double getLineX() const { return lineX; }
double getLineY() const { return lineY; }
// Is there a current point/path?
bool isCurPt() const { return path->isCurPt(); }
bool isPath() const { return path->isPath(); }
// Transforms.
void transform(double x1, double y1, double *x2, double *y2) const
{
*x2 = ctm[0] * x1 + ctm[2] * y1 + ctm[4];
*y2 = ctm[1] * x1 + ctm[3] * y1 + ctm[5];
}
void transformDelta(double x1, double y1, double *x2, double *y2) const
{
*x2 = ctm[0] * x1 + ctm[2] * y1;
*y2 = ctm[1] * x1 + ctm[3] * y1;
}
void textTransform(double x1, double y1, double *x2, double *y2) const
{
*x2 = textMat[0] * x1 + textMat[2] * y1 + textMat[4];
*y2 = textMat[1] * x1 + textMat[3] * y1 + textMat[5];
}
void textTransformDelta(double x1, double y1, double *x2, double *y2) const
{
*x2 = textMat[0] * x1 + textMat[2] * y1;
*y2 = textMat[1] * x1 + textMat[3] * y1;
}
double transformWidth(double w) const;
double getTransformedLineWidth() const { return transformWidth(lineWidth); }
double getTransformedFontSize() const;
void getFontTransMat(double *m11, double *m12, double *m21, double *m22) const;
// Change state parameters.
void setCTM(double a, double b, double c, double d, double e, double f);
void concatCTM(double a, double b, double c, double d, double e, double f);
void shiftCTMAndClip(double tx, double ty);
void setFillColorSpace(std::unique_ptr<GfxColorSpace> &&colorSpace);
void setStrokeColorSpace(std::unique_ptr<GfxColorSpace> &&colorSpace);
void setFillColor(const GfxColor *color) { fillColor = *color; }
void setStrokeColor(const GfxColor *color) { strokeColor = *color; }
void setFillPattern(GfxPattern *pattern);
void setStrokePattern(GfxPattern *pattern);
void setBlendMode(GfxBlendMode mode) { blendMode = mode; }
void setFillOpacity(double opac) { fillOpacity = opac; }
void setStrokeOpacity(double opac) { strokeOpacity = opac; }
void setFillOverprint(bool op) { fillOverprint = op; }
void setStrokeOverprint(bool op) { strokeOverprint = op; }
void setOverprintMode(int op) { overprintMode = op; }
void setTransfer(Function **funcs);
void setLineWidth(double width) { lineWidth = width; }
void setLineDash(std::vector<double> &&dash, double start);
void setFlatness(int flatness1) { flatness = flatness1; }
void setLineJoin(int lineJoin1) { lineJoin = static_cast<LineJoinStyle>(lineJoin1); }
void setLineCap(int lineCap1) { lineCap = static_cast<LineCapStyle>(lineCap1); }
void setMiterLimit(double limit) { miterLimit = limit; }
void setStrokeAdjust(bool sa) { strokeAdjust = sa; }
void setAlphaIsShape(bool ais) { alphaIsShape = ais; }
void setTextKnockout(bool tk) { textKnockout = tk; }
void setFont(std::shared_ptr<GfxFont> fontA, double fontSizeA);
void setTextMat(double a, double b, double c, double d, double e, double f)
{
textMat[0] = a;
textMat[1] = b;
textMat[2] = c;
textMat[3] = d;
textMat[4] = e;
textMat[5] = f;
}
void setCharSpace(double space) { charSpace = space; }
void setWordSpace(double space) { wordSpace = space; }
void setHorizScaling(double scale) { horizScaling = 0.01 * scale; }
void setLeading(double leadingA) { leading = leadingA; }
void setRise(double riseA) { rise = riseA; }
void setRender(int renderA) { render = renderA; }
void setRenderingIntent(const char *intent) { strncpy(renderingIntent, intent, 31); }
#ifdef USE_CMS
void setDisplayProfile(const GfxLCMSProfilePtr &localDisplayProfileA);
GfxLCMSProfilePtr getDisplayProfile() { return localDisplayProfile; }
std::shared_ptr<GfxColorTransform> getXYZ2DisplayTransform();
int getCmsRenderingIntent();
static GfxLCMSProfilePtr sRGBProfile;
#endif
void setDefaultGrayColorSpace(std::unique_ptr<GfxColorSpace> &&cs) { defaultGrayColorSpace = std::move(cs); }
void setDefaultRGBColorSpace(std::unique_ptr<GfxColorSpace> &&cs) { defaultRGBColorSpace = std::move(cs); }
void setDefaultCMYKColorSpace(std::unique_ptr<GfxColorSpace> &&cs) { defaultCMYKColorSpace = std::move(cs); }
std::unique_ptr<GfxColorSpace> copyDefaultGrayColorSpace()
{
if (defaultGrayColorSpace) {
return defaultGrayColorSpace->copy();
}
return std::make_unique<GfxDeviceGrayColorSpace>();
}
std::unique_ptr<GfxColorSpace> copyDefaultRGBColorSpace()
{
if (defaultRGBColorSpace) {
return defaultRGBColorSpace->copy();
}
return std::make_unique<GfxDeviceRGBColorSpace>();
}
std::unique_ptr<GfxColorSpace> copyDefaultCMYKColorSpace()
{
if (defaultCMYKColorSpace) {
return defaultCMYKColorSpace->copy();
}
return std::make_unique<GfxDeviceCMYKColorSpace>();
}
// Add to path.
void moveTo(double x, double y) { path->moveTo(curX = x, curY = y); }
void lineTo(double x, double y) { path->lineTo(curX = x, curY = y); }
void curveTo(double x1, double y1, double x2, double y2, double x3, double y3) { path->curveTo(x1, y1, x2, y2, curX = x3, curY = y3); }
void closePath()
{
path->close();
curX = path->getLastX();
curY = path->getLastY();
}
void clearPath();
// Update clip region.
void clip();
void clipToStrokePath();
void clipToRect(double xMin, double yMin, double xMax, double yMax);
// Text position.
void textSetPos(double tx, double ty)
{
lineX = tx;
lineY = ty;
}
void textMoveTo(double tx, double ty)
{
lineX = tx;
lineY = ty;
textTransform(tx, ty, &curX, &curY);
}
void textShift(double tx, double ty);
void shift(double dx, double dy);
// Push/pop GfxState on/off stack.
GfxState *save();
GfxState *restore();
bool hasSaves() const { return saved != nullptr; }
bool isParentState(GfxState *state) { return saved == state || (saved && saved->isParentState(state)); }
// Misc
bool parseBlendMode(Object *obj, GfxBlendMode *mode);
ReusablePathIterator *getReusablePath() { return new ReusablePathIterator(path); }
private:
double hDPI, vDPI; // resolution
double ctm[6]; // coord transform matrix
double px1, py1, px2, py2; // page corners (user coords)
double pageWidth, pageHeight; // page size (pixels)
int rotate; // page rotation angle
std::unique_ptr<GfxColorSpace> fillColorSpace; // fill color space
std::unique_ptr<GfxColorSpace> strokeColorSpace; // stroke color space
GfxColor fillColor; // fill color
GfxColor strokeColor; // stroke color
GfxPattern *fillPattern; // fill pattern
GfxPattern *strokePattern; // stroke pattern
GfxBlendMode blendMode; // transparency blend mode
double fillOpacity; // fill opacity
double strokeOpacity; // stroke opacity
bool fillOverprint; // fill overprint
bool strokeOverprint; // stroke overprint
int overprintMode; // overprint mode
Function *transfer[4]; // transfer function (entries may be: all
// nullptr = identity; last three nullptr =
// single function; all four non-nullptr =
// R,G,B,gray functions)
double lineWidth; // line width
std::vector<double> lineDash; // line dash
double lineDashStart;
int flatness; // curve flatness
LineJoinStyle lineJoin; // line join style
LineCapStyle lineCap; // line cap style
double miterLimit; // line miter limit
bool strokeAdjust; // stroke adjustment
bool alphaIsShape; // alpha is shape
bool textKnockout; // text knockout
std::shared_ptr<GfxFont> font; // font
double fontSize; // font size
double textMat[6]; // text matrix
double charSpace; // character spacing
double wordSpace; // word spacing
double horizScaling; // horizontal scaling
double leading; // text leading
double rise; // text rise
int render; // text rendering mode
GfxPath *path; // array of path elements
double curX, curY; // current point (user coords)
double lineX, lineY; // start of current text line (text coords)
double clipXMin, clipYMin, // bounding box for clip region
clipXMax, clipYMax;
char renderingIntent[32];
GfxState *saved; // next GfxState on stack
GfxState(const GfxState *state, bool copyPath);
#ifdef USE_CMS
GfxLCMSProfilePtr localDisplayProfile;
std::shared_ptr<GfxColorTransform> XYZ2DisplayTransformRelCol;
std::shared_ptr<GfxColorTransform> XYZ2DisplayTransformAbsCol;
std::shared_ptr<GfxColorTransform> XYZ2DisplayTransformSat;
std::shared_ptr<GfxColorTransform> XYZ2DisplayTransformPerc;
static GfxLCMSProfilePtr XYZProfile;
#endif
std::unique_ptr<GfxColorSpace> defaultGrayColorSpace;
std::unique_ptr<GfxColorSpace> defaultRGBColorSpace;
std::unique_ptr<GfxColorSpace> defaultCMYKColorSpace;
};
#endif