poppler/CairoOutputDev.h - third_party/poppler - Git at Google

 //========================================================================
 //
 // CairoOutputDev.h
 //
 // Copyright 2003 Glyph & Cog, LLC
 // Copyright 2004 Red Hat, INC
 //
 //========================================================================

 //========================================================================
 //
 // 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) 2005-2008 Jeff Muizelaar <jeff@infidigm.net>
 // Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
 // Copyright (C) 2005 Nickolay V. Shmyrev <nshmyrev@yandex.ru>
 // Copyright (C) 2006-2011, 2013 Carlos Garcia Campos <carlosgc@gnome.org>
 // Copyright (C) 2008, 2009, 2011-2014 Adrian Johnson <ajohnson@redneon.com>
 // Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu>
 // Copyright (C) 2010-2013 Thomas Freitag <Thomas.Freitag@alfa.de>
 //
 // 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 CAIROOUTPUTDEV_H
 #define CAIROOUTPUTDEV_H

 #ifdef USE_GCC_PRAGMAS
 #pragma interface
 #endif

 #include "goo/gtypes.h"
 #include <cairo-ft.h>
 #include "OutputDev.h"
 #include "TextOutputDev.h"
 #include "GfxState.h"

 class PDFDoc;
 class GfxState;
 class GfxPath;
 class Gfx8BitFont;
 struct GfxRGB;
 class CairoFontEngine;
 class CairoFont;

 //------------------------------------------------------------------------

 //------------------------------------------------------------------------
 // CairoImage
 //------------------------------------------------------------------------
 class CairoImage {
 public:
   // Constructor.
   CairoImage (double x1, double y1, double x2, double y2);

   // Destructor.
   ~CairoImage ();

   // Set the image cairo surface
   void setImage (cairo_surface_t *image);

   // Get the image cairo surface
   cairo_surface_t *getImage () const { return image; }

   // Get the image rectangle
   void getRect (double *xa1, double *ya1, double *xa2, double *ya2)
 	  { *xa1 = x1; *ya1 = y1; *xa2 = x2; *ya2 = y2; }

 private:
   cairo_surface_t *image;  // image cairo surface
   double x1, y1;          // upper left corner
   double x2, y2;          // lower right corner
 };


 //------------------------------------------------------------------------
 // CairoOutputDev
 //------------------------------------------------------------------------

 class CairoOutputDev: public OutputDev {
 public:

   // Constructor.
   CairoOutputDev();

   // Destructor.
   virtual ~CairoOutputDev();

   //----- get info about output device

   // Does this device use upside-down coordinates?
   // (Upside-down means (0,0) is the top left corner of the page.)
   virtual GBool upsideDown() { return gTrue; }

   // Does this device use drawChar() or drawString()?
   virtual GBool useDrawChar() { return gTrue; }

   // Does this device use tilingPatternFill()?  If this returns false,
   // tiling pattern fills will be reduced to a series of other drawing
   // operations.
   virtual GBool useTilingPatternFill() { return gTrue; }

   // Does this device use functionShadedFill(), axialShadedFill(), and
   // radialShadedFill()?  If this returns false, these shaded fills
   // will be reduced to a series of other drawing operations.
 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 12, 0)
   virtual GBool useShadedFills(int type) { return type <= 7; }
 #else
   virtual GBool useShadedFills(int type) { return type < 4; }
 #endif

   // Does this device use FillColorStop()?
   virtual GBool useFillColorStop() { return gTrue; }

   // Does this device use beginType3Char/endType3Char?  Otherwise,
   // text in Type 3 fonts will be drawn with drawChar/drawString.
   virtual GBool interpretType3Chars() { return gFalse; }

   // Does this device need to clip pages to the crop box even when the
   // box is the crop box?
   virtual GBool needClipToCropBox() { return gTrue; }

   //----- initialization and control

   // Start a page.
   virtual void startPage(int pageNum, GfxState *state, XRef *xref);

   // End a page.
   virtual void endPage();

   //----- save/restore graphics state
   virtual void saveState(GfxState *state);
   virtual void restoreState(GfxState *state);

   //----- update graphics state
   virtual void updateAll(GfxState *state);
   virtual void setDefaultCTM(double *ctm);
   virtual void updateCTM(GfxState *state, double m11, double m12,
 			 double m21, double m22, double m31, double m32);
   virtual void updateLineDash(GfxState *state);
   virtual void updateFlatness(GfxState *state);
   virtual void updateLineJoin(GfxState *state);
   virtual void updateLineCap(GfxState *state);
   virtual void updateMiterLimit(GfxState *state);
   virtual void updateLineWidth(GfxState *state);
   virtual void updateFillColor(GfxState *state);
   virtual void updateStrokeColor(GfxState *state);
   virtual void updateFillOpacity(GfxState *state);
   virtual void updateStrokeOpacity(GfxState *state);
   virtual void updateFillColorStop(GfxState *state, double offset);
   virtual void updateBlendMode(GfxState *state);

   //----- update text state
   virtual void updateFont(GfxState *state);

   //----- path painting
   virtual void stroke(GfxState *state);
   virtual void fill(GfxState *state);
   virtual void eoFill(GfxState *state);
   virtual void clipToStrokePath(GfxState *state);
   virtual GBool tilingPatternFill(GfxState *state, Gfx *gfx, Catalog *cat, Object *str,
 				  double *pmat, int paintType, int tilingType, Dict *resDict,
 				  double *mat, double *bbox,
 				  int x0, int y0, int x1, int y1,
 				  double xStep, double yStep);
   virtual GBool axialShadedFill(GfxState *state, GfxAxialShading *shading, double tMin, double tMax);
   virtual GBool axialShadedSupportExtend(GfxState *state, GfxAxialShading *shading);
   virtual GBool radialShadedFill(GfxState *state, GfxRadialShading *shading, double sMin, double sMax);
   virtual GBool radialShadedSupportExtend(GfxState *state, GfxRadialShading *shading);
 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 12, 0)
   virtual GBool gouraudTriangleShadedFill(GfxState *state, GfxGouraudTriangleShading *shading);
   virtual GBool patchMeshShadedFill(GfxState *state, GfxPatchMeshShading *shading);
 #endif

   //----- path clipping
   virtual void clip(GfxState *state);
   virtual void eoClip(GfxState *state);

   //----- text drawing
   void beginString(GfxState *state, GooString *s);
   void endString(GfxState *state);
   void drawChar(GfxState *state, double x, double y,
 		double dx, double dy,
 		double originX, double originY,
 		CharCode code, int nBytes, Unicode *u, int uLen);
   void beginActualText(GfxState *state, GooString *text);
   void endActualText(GfxState *state);

   virtual GBool beginType3Char(GfxState *state, double x, double y,
 			       double dx, double dy,
 			       CharCode code, Unicode *u, int uLen);
   virtual void endType3Char(GfxState *state);
   virtual void beginTextObject(GfxState *state);
   virtual void endTextObject(GfxState *state);

   //----- image drawing
   virtual void drawImageMask(GfxState *state, Object *ref, Stream *str,
 			     int width, int height, GBool invert, GBool interpolate,
 			     GBool inlineImg);
   virtual void setSoftMaskFromImageMask(GfxState *state,
 					Object *ref, Stream *str,
 					int width, int height, GBool invert,
 					GBool inlineImg, double *baseMatrix);
   virtual void unsetSoftMaskFromImageMask(GfxState *state, double *baseMatrix);
   void drawImageMaskPrescaled(GfxState *state, Object *ref, Stream *str,
 			      int width, int height, GBool invert, GBool interpolate,
 			      GBool inlineImg);
   void drawImageMaskRegular(GfxState *state, Object *ref, Stream *str,
 			    int width, int height, GBool invert, GBool interpolate,
 			    GBool inlineImg);

   virtual void drawImage(GfxState *state, Object *ref, Stream *str,
 			 int width, int height, GfxImageColorMap *colorMap,
 			 GBool interpolate, int *maskColors, GBool inlineImg);
   virtual void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 				   int width, int height,
 				   GfxImageColorMap *colorMap,
 				   GBool interpolate,
 				   Stream *maskStr,
 				   int maskWidth, int maskHeight,
 				   GfxImageColorMap *maskColorMap,
 				   GBool maskInterpolate);

   virtual void drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 			       int width, int height,
 			       GfxImageColorMap *colorMap,
 			       GBool interpolate,
 			       Stream *maskStr,
 			       int maskWidth, int maskHeight,
 			       GBool maskInvert, GBool maskInterpolate);

   //----- transparency groups and soft masks
   virtual void beginTransparencyGroup(GfxState * /*state*/, double * /*bbox*/,
                                       GfxColorSpace * /*blendingColorSpace*/,
                                       GBool /*isolated*/, GBool /*knockout*/,
                                       GBool /*forSoftMask*/);
   virtual void endTransparencyGroup(GfxState * /*state*/);
   void popTransparencyGroup();
   virtual void paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/);
   virtual void setSoftMask(GfxState * /*state*/, double * /*bbox*/, GBool /*alpha*/,
                            Function * /*transferFunc*/, GfxColor * /*backdropColor*/);
   virtual void clearSoftMask(GfxState * /*state*/);

   //----- Type 3 font operators
   virtual void type3D0(GfxState *state, double wx, double wy);
   virtual void type3D1(GfxState *state, double wx, double wy,
       double llx, double lly, double urx, double ury);

   //----- special access

   // Called to indicate that a new PDF document has been loaded.
   void startDoc(PDFDoc *docA, CairoFontEngine *fontEngine = NULL);

   GBool isReverseVideo() { return gFalse; }

   void setCairo (cairo_t *cr);
   void setTextPage (TextPage *text);
   void setPrinting (GBool printing) { this->printing = printing; needFontUpdate = gTrue; }

   void setInType3Char(GBool inType3Char) { this->inType3Char = inType3Char; }
   void getType3GlyphWidth (double *wx, double *wy) { *wx = t3_glyph_wx; *wy = t3_glyph_wy; }
   GBool hasType3GlyphBBox () { return t3_glyph_has_bbox; }
   double *getType3GlyphBBox () { return t3_glyph_bbox; }

 protected:
   void doPath(cairo_t *cairo, GfxState *state, GfxPath *path);
   cairo_surface_t *downscaleSurface(cairo_surface_t *orig_surface);
   void getScaledSize(const cairo_matrix_t *matrix,
                      int orig_width, int orig_height,
 		     int *scaledWidth, int *scaledHeight);
   cairo_filter_t getFilterForSurface(cairo_surface_t *image,
 				     GBool interpolate);
   GBool getStreamData (Stream *str, char **buffer, int *length);
   void setMimeData(Stream *str, Object *ref, cairo_surface_t *image);
   void fillToStrokePathClip(GfxState *state);
   void alignStrokeCoords(GfxSubpath *subpath, int i, double *x, double *y);

   GfxRGB fill_color, stroke_color;
   cairo_pattern_t *fill_pattern, *stroke_pattern;
   double fill_opacity;
   double stroke_opacity;
   GBool stroke_adjust;
   GBool adjusted_stroke_width;
   GBool align_stroke_coords;
   CairoFont *currentFont;
   XRef *xref;

   struct StrokePathClip {
     GfxPath *path;
     cairo_matrix_t ctm;
     double line_width;
     double *dashes;
     int dash_count;
     double dash_offset;
     cairo_line_cap_t cap;
     cairo_line_join_t join;
     double miter;
   } *strokePathClip;

   PDFDoc *doc;			// the current document

   static FT_Library ft_lib;
   static GBool ft_lib_initialized;

   CairoFontEngine *fontEngine;
   GBool fontEngine_owner;

   cairo_t *cairo;
   cairo_matrix_t orig_matrix;
   GBool needFontUpdate;                // set when the font needs to be updated
   GBool printing;
   GBool use_show_text_glyphs;
   cairo_surface_t *surface;
   cairo_glyph_t *glyphs;
   int glyphCount;
   cairo_text_cluster_t *clusters;
   int clusterCount;
   char *utf8;
   int utf8Count;
   int utf8Max;
   cairo_path_t *textClipPath;
   GBool inUncoloredPattern;     // inside a uncolored pattern (PaintType = 2)
   GBool inType3Char;		// inside a Type 3 CharProc
   double t3_glyph_wx, t3_glyph_wy;
   GBool t3_glyph_has_bbox;
   double t3_glyph_bbox[4];

   GBool prescaleImages;

   TextPage *text;		// text for the current page
   ActualText *actualText;

   cairo_pattern_t *group;
   cairo_pattern_t *shape;
   cairo_pattern_t *mask;
   cairo_matrix_t mask_matrix;
   cairo_surface_t *cairo_shape_surface;
   cairo_t *cairo_shape;
   int knockoutCount;
   struct ColorSpaceStack {
     GBool knockout;
     GfxColorSpace *cs;
     cairo_matrix_t group_matrix;
     struct ColorSpaceStack *next;
   } * groupColorSpaceStack;

   struct MaskStack {
     cairo_pattern_t *mask;
     cairo_matrix_t mask_matrix;
     struct MaskStack *next;
   } *maskStack;

 };

 //------------------------------------------------------------------------
 // CairoImageOutputDev
 //------------------------------------------------------------------------

 //XXX: this should ideally not inherit from CairoOutputDev but use it instead perhaps
 class CairoImageOutputDev: public CairoOutputDev {
 public:

   // Constructor.
   CairoImageOutputDev();

   // Destructor.
   virtual ~CairoImageOutputDev();

   //----- get info about output device

   // Does this device use upside-down coordinates?
   // (Upside-down means (0,0) is the top left corner of the page.)
   virtual GBool upsideDown() { return gTrue; }

   // Does this device use drawChar() or drawString()?
   virtual GBool useDrawChar() { return gFalse; }

   // Does this device use tilingPatternFill()?  If this returns false,
   // tiling pattern fills will be reduced to a series of other drawing
   // operations.
   virtual GBool useTilingPatternFill() { return gTrue; }

   // Does this device use functionShadedFill(), axialShadedFill(), and
   // radialShadedFill()?  If this returns false, these shaded fills
   // will be reduced to a series of other drawing operations.
 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 11, 2)
   virtual GBool useShadedFills(int type) { return type <= 7; }
 #else
   virtual GBool useShadedFills(int type) { return type < 4; }
 #endif

   // Does this device use FillColorStop()?
   virtual GBool useFillColorStop() { return gFalse; }

   // Does this device use beginType3Char/endType3Char?  Otherwise,
   // text in Type 3 fonts will be drawn with drawChar/drawString.
   virtual GBool interpretType3Chars() { return gFalse; }

   // Does this device need non-text content?
   virtual GBool needNonText() { return gTrue; }

   //----- save/restore graphics state
   virtual void saveState(GfxState *state) { }
   virtual void restoreState(GfxState *state) { }

   //----- update graphics state
   virtual void updateAll(GfxState *state) { }
   virtual void setDefaultCTM(double *ctm) { }
   virtual void updateCTM(GfxState *state, double m11, double m12,
 				 double m21, double m22, double m31, double m32) { }
   virtual void updateLineDash(GfxState *state) { }
   virtual void updateFlatness(GfxState *state) { }
   virtual void updateLineJoin(GfxState *state) { }
   virtual void updateLineCap(GfxState *state) { }
   virtual void updateMiterLimit(GfxState *state) { }
   virtual void updateLineWidth(GfxState *state) { }
   virtual void updateFillColor(GfxState *state) { }
   virtual void updateStrokeColor(GfxState *state) { }
   virtual void updateFillOpacity(GfxState *state) { }
   virtual void updateStrokeOpacity(GfxState *state) { }
   virtual void updateBlendMode(GfxState *state) { }

   //----- update text state
   virtual void updateFont(GfxState *state) { }

   //----- path painting
   virtual void stroke(GfxState *state) { }
   virtual void fill(GfxState *state) { }
   virtual void eoFill(GfxState *state) { }
   virtual void clipToStrokePath(GfxState *state) { }
   virtual GBool tilingPatternFill(GfxState *state, Gfx *gfx, Catalog *cat, Object *str,
 				  double *pmat, int paintType, int tilingType, Dict *resDict,
 				  double *mat, double *bbox,
 				  int x0, int y0, int x1, int y1,
 				  double xStep, double yStep) { return gTrue; }
   virtual GBool axialShadedFill(GfxState *state,
 				GfxAxialShading *shading,
 				double tMin, double tMax) { return gTrue; }
   virtual GBool radialShadedFill(GfxState *state,
 				 GfxRadialShading *shading,
 				 double sMin, double sMax) { return gTrue; }

   //----- path clipping
   virtual void clip(GfxState *state) { }
   virtual void eoClip(GfxState *state) { }

   //----- image drawing
   virtual void drawImageMask(GfxState *state, Object *ref, Stream *str,
 			     int width, int height, GBool invert,
 			     GBool interpolate, GBool inlineImg);
   virtual void drawImage(GfxState *state, Object *ref, Stream *str,
 			 int width, int height, GfxImageColorMap *colorMap,
 			 GBool interpolate, int *maskColors, GBool inlineImg);
   virtual void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 				   int width, int height,
 				   GfxImageColorMap *colorMap,
 				   GBool interpolate,
 				   Stream *maskStr,
 				   int maskWidth, int maskHeight,
 				   GfxImageColorMap *maskColorMap,
 				   GBool maskInterpolate);
   virtual void drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 			       int width, int height,
 			       GfxImageColorMap *colorMap,
 			       GBool interpolate,
 			       Stream *maskStr,
 			       int maskWidth, int maskHeight,
 			       GBool maskInvert, GBool maskInterpolate);
   virtual void setSoftMaskFromImageMask(GfxState *state, Object *ref, Stream *str,
                                         int width, int height, GBool invert,
                                         GBool inlineImg, double *baseMatrix);
   virtual void unsetSoftMaskFromImageMask(GfxState *state, double *baseMatrix) {}


   //----- transparency groups and soft masks
   virtual void beginTransparencyGroup(GfxState * /*state*/, double * /*bbox*/,
 				      GfxColorSpace * /*blendingColorSpace*/,
 				      GBool /*isolated*/, GBool /*knockout*/,
 				      GBool /*forSoftMask*/) {}
   virtual void endTransparencyGroup(GfxState * /*state*/) {}
   virtual void paintTransparencyGroup(GfxState * /*state*/, double * /*bbox*/) {}
   virtual void setSoftMask(GfxState * /*state*/, double * /*bbox*/, GBool /*alpha*/,
 			   Function * /*transferFunc*/, GfxColor * /*backdropColor*/) {}
   virtual void clearSoftMask(GfxState * /*state*/) {}

   //----- Image list
   // By default images are not rendred
   void setImageDrawDecideCbk(GBool (*cbk)(int img_id, void *data),
 			     void *data) { imgDrawCbk = cbk; imgDrawCbkData = data; }
   // Iterate through list of images.
   int getNumImages() const { return numImages; }
   CairoImage *getImage(int i) const { return images[i]; }

 private:
   void saveImage(CairoImage *image);
   void getBBox(GfxState *state, int width, int height,
                double *x1, double *y1, double *x2, double *y2);

   CairoImage **images;
   int numImages;
   int size;
   GBool (*imgDrawCbk)(int img_id, void *data);
   void *imgDrawCbkData;
 };

 #endif
	//========================================================================
	//
	// CairoOutputDev.h
	//
	// Copyright 2003 Glyph & Cog, LLC
	// Copyright 2004 Red Hat, INC
	//
	//========================================================================

	//========================================================================
	//
	// 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) 2005-2008 Jeff Muizelaar <jeff@infidigm.net>
	// Copyright (C) 2005, 2006 Kristian Høgsberg <krh@redhat.com>
	// Copyright (C) 2005 Nickolay V. Shmyrev <nshmyrev@yandex.ru>
	// Copyright (C) 2006-2011, 2013 Carlos Garcia Campos <carlosgc@gnome.org>
	// Copyright (C) 2008, 2009, 2011-2014 Adrian Johnson <ajohnson@redneon.com>
	// Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu>
	// Copyright (C) 2010-2013 Thomas Freitag <Thomas.Freitag@alfa.de>
	//
	// 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 CAIROOUTPUTDEV_H
	#define CAIROOUTPUTDEV_H

	#ifdef USE_GCC_PRAGMAS
	#pragma interface
	#endif

	#include "goo/gtypes.h"
	#include <cairo-ft.h>
	#include "OutputDev.h"
	#include "TextOutputDev.h"
	#include "GfxState.h"

	class PDFDoc;
	class GfxState;
	class GfxPath;
	class Gfx8BitFont;
	struct GfxRGB;
	class CairoFontEngine;
	class CairoFont;

	//------------------------------------------------------------------------

	//------------------------------------------------------------------------
	// CairoImage
	//------------------------------------------------------------------------
	class CairoImage {
	public:
	// Constructor.
	CairoImage (double x1, double y1, double x2, double y2);

	// Destructor.
	~CairoImage ();

	// Set the image cairo surface
	void setImage (cairo_surface_t *image);

	// Get the image cairo surface
	cairo_surface_t *getImage () const { return image; }

	// Get the image rectangle
	void getRect (double xa1, double ya1, double xa2, double ya2)
	{ xa1 = x1; ya1 = y1; xa2 = x2; ya2 = y2; }

	private:
	cairo_surface_t *image; // image cairo surface
	double x1, y1; // upper left corner
	double x2, y2; // lower right corner
	};


	//------------------------------------------------------------------------
	// CairoOutputDev
	//------------------------------------------------------------------------

	class CairoOutputDev: public OutputDev {
	public:

	// Constructor.
	CairoOutputDev();

	// Destructor.
	virtual ~CairoOutputDev();

	//----- get info about output device

	// Does this device use upside-down coordinates?
	// (Upside-down means (0,0) is the top left corner of the page.)
	virtual GBool upsideDown() { return gTrue; }

	// Does this device use drawChar() or drawString()?
	virtual GBool useDrawChar() { return gTrue; }

	// Does this device use tilingPatternFill()? If this returns false,
	// tiling pattern fills will be reduced to a series of other drawing
	// operations.
	virtual GBool useTilingPatternFill() { return gTrue; }

	// Does this device use functionShadedFill(), axialShadedFill(), and
	// radialShadedFill()? If this returns false, these shaded fills
	// will be reduced to a series of other drawing operations.
	#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 12, 0)
	virtual GBool useShadedFills(int type) { return type <= 7; }
	#else
	virtual GBool useShadedFills(int type) { return type < 4; }
	#endif

	// Does this device use FillColorStop()?
	virtual GBool useFillColorStop() { return gTrue; }

	// Does this device use beginType3Char/endType3Char? Otherwise,
	// text in Type 3 fonts will be drawn with drawChar/drawString.
	virtual GBool interpretType3Chars() { return gFalse; }

	// Does this device need to clip pages to the crop box even when the
	// box is the crop box?
	virtual GBool needClipToCropBox() { return gTrue; }

	//----- initialization and control

	// Start a page.
	virtual void startPage(int pageNum, GfxState state, XRef xref);

	// End a page.
	virtual void endPage();

	//----- save/restore graphics state
	virtual void saveState(GfxState *state);
	virtual void restoreState(GfxState *state);

	//----- update graphics state
	virtual void updateAll(GfxState *state);
	virtual void setDefaultCTM(double *ctm);
	virtual void updateCTM(GfxState *state, double m11, double m12,
	double m21, double m22, double m31, double m32);
	virtual void updateLineDash(GfxState *state);
	virtual void updateFlatness(GfxState *state);
	virtual void updateLineJoin(GfxState *state);
	virtual void updateLineCap(GfxState *state);
	virtual void updateMiterLimit(GfxState *state);
	virtual void updateLineWidth(GfxState *state);
	virtual void updateFillColor(GfxState *state);
	virtual void updateStrokeColor(GfxState *state);
	virtual void updateFillOpacity(GfxState *state);
	virtual void updateStrokeOpacity(GfxState *state);
	virtual void updateFillColorStop(GfxState *state, double offset);
	virtual void updateBlendMode(GfxState *state);

	//----- update text state
	virtual void updateFont(GfxState *state);

	//----- path painting
	virtual void stroke(GfxState *state);
	virtual void fill(GfxState *state);
	virtual void eoFill(GfxState *state);
	virtual void clipToStrokePath(GfxState *state);
	virtual GBool tilingPatternFill(GfxState state, Gfx gfx, Catalog cat, Object str,
	double pmat, int paintType, int tilingType, Dict resDict,
	double mat, double bbox,
	int x0, int y0, int x1, int y1,
	double xStep, double yStep);
	virtual GBool axialShadedFill(GfxState state, GfxAxialShading shading, double tMin, double tMax);
	virtual GBool axialShadedSupportExtend(GfxState state, GfxAxialShading shading);
	virtual GBool radialShadedFill(GfxState state, GfxRadialShading shading, double sMin, double sMax);
	virtual GBool radialShadedSupportExtend(GfxState state, GfxRadialShading shading);
	#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 12, 0)
	virtual GBool gouraudTriangleShadedFill(GfxState state, GfxGouraudTriangleShading shading);
	virtual GBool patchMeshShadedFill(GfxState state, GfxPatchMeshShading shading);
	#endif

	//----- path clipping
	virtual void clip(GfxState *state);
	virtual void eoClip(GfxState *state);

	//----- text drawing
	void beginString(GfxState state, GooString s);
	void endString(GfxState *state);
	void drawChar(GfxState *state, double x, double y,
	double dx, double dy,
	double originX, double originY,
	CharCode code, int nBytes, Unicode *u, int uLen);
	void beginActualText(GfxState state, GooString text);
	void endActualText(GfxState *state);

	virtual GBool beginType3Char(GfxState *state, double x, double y,
	double dx, double dy,
	CharCode code, Unicode *u, int uLen);
	virtual void endType3Char(GfxState *state);
	virtual void beginTextObject(GfxState *state);
	virtual void endTextObject(GfxState *state);

	//----- image drawing
	virtual void drawImageMask(GfxState state, Object ref, Stream *str,
	int width, int height, GBool invert, GBool interpolate,
	GBool inlineImg);
	virtual void setSoftMaskFromImageMask(GfxState *state,
	Object ref, Stream str,
	int width, int height, GBool invert,
	GBool inlineImg, double *baseMatrix);
	virtual void unsetSoftMaskFromImageMask(GfxState state, double baseMatrix);
	void drawImageMaskPrescaled(GfxState state, Object ref, Stream *str,
	int width, int height, GBool invert, GBool interpolate,
	GBool inlineImg);
	void drawImageMaskRegular(GfxState state, Object ref, Stream *str,
	int width, int height, GBool invert, GBool interpolate,
	GBool inlineImg);

	virtual void drawImage(GfxState state, Object ref, Stream *str,
	int width, int height, GfxImageColorMap *colorMap,
	GBool interpolate, int *maskColors, GBool inlineImg);
	virtual void drawSoftMaskedImage(GfxState state, Object ref, Stream *str,
	int width, int height,
	GfxImageColorMap *colorMap,
	GBool interpolate,
	Stream *maskStr,
	int maskWidth, int maskHeight,
	GfxImageColorMap *maskColorMap,
	GBool maskInterpolate);

	virtual void drawMaskedImage(GfxState state, Object ref, Stream *str,
	int width, int height,
	GfxImageColorMap *colorMap,
	GBool interpolate,
	Stream *maskStr,
	int maskWidth, int maskHeight,
	GBool maskInvert, GBool maskInterpolate);

	//----- transparency groups and soft masks
	virtual void beginTransparencyGroup(GfxState * /state/, double * /bbox/,
	GfxColorSpace * /blendingColorSpace/,
	GBool /isolated/, GBool /knockout/,
	GBool /forSoftMask/);
	virtual void endTransparencyGroup(GfxState * /state/);
	void popTransparencyGroup();
	virtual void paintTransparencyGroup(GfxState * /state/, double * /bbox/);
	virtual void setSoftMask(GfxState * /state/, double * /bbox/, GBool /alpha/,
	Function * /transferFunc/, GfxColor * /backdropColor/);
	virtual void clearSoftMask(GfxState * /state/);

	//----- Type 3 font operators
	virtual void type3D0(GfxState *state, double wx, double wy);
	virtual void type3D1(GfxState *state, double wx, double wy,
	double llx, double lly, double urx, double ury);

	//----- special access

	// Called to indicate that a new PDF document has been loaded.
	void startDoc(PDFDoc docA, CairoFontEngine fontEngine = NULL);

	GBool isReverseVideo() { return gFalse; }

	void setCairo (cairo_t *cr);
	void setTextPage (TextPage *text);
	void setPrinting (GBool printing) { this->printing = printing; needFontUpdate = gTrue; }

	void setInType3Char(GBool inType3Char) { this->inType3Char = inType3Char; }
	void getType3GlyphWidth (double wx, double wy) { wx = t3_glyph_wx; wy = t3_glyph_wy; }
	GBool hasType3GlyphBBox () { return t3_glyph_has_bbox; }
	double *getType3GlyphBBox () { return t3_glyph_bbox; }

	protected:
	void doPath(cairo_t cairo, GfxState state, GfxPath *path);
	cairo_surface_t downscaleSurface(cairo_surface_t orig_surface);
	void getScaledSize(const cairo_matrix_t *matrix,
	int orig_width, int orig_height,
	int scaledWidth, int scaledHeight);
	cairo_filter_t getFilterForSurface(cairo_surface_t *image,
	GBool interpolate);
	GBool getStreamData (Stream str, char buffer, int length);
	void setMimeData(Stream str, Object ref, cairo_surface_t *image);
	void fillToStrokePathClip(GfxState *state);
	void alignStrokeCoords(GfxSubpath subpath, int i, double x, double *y);

	GfxRGB fill_color, stroke_color;
	cairo_pattern_t fill_pattern, stroke_pattern;
	double fill_opacity;
	double stroke_opacity;
	GBool stroke_adjust;
	GBool adjusted_stroke_width;
	GBool align_stroke_coords;
	CairoFont *currentFont;
	XRef *xref;

	struct StrokePathClip {
	GfxPath *path;
	cairo_matrix_t ctm;
	double line_width;
	double *dashes;
	int dash_count;
	double dash_offset;
	cairo_line_cap_t cap;
	cairo_line_join_t join;
	double miter;
	} *strokePathClip;

	PDFDoc *doc; // the current document

	static FT_Library ft_lib;
	static GBool ft_lib_initialized;

	CairoFontEngine *fontEngine;
	GBool fontEngine_owner;

	cairo_t *cairo;
	cairo_matrix_t orig_matrix;
	GBool needFontUpdate; // set when the font needs to be updated
	GBool printing;
	GBool use_show_text_glyphs;
	cairo_surface_t *surface;
	cairo_glyph_t *glyphs;
	int glyphCount;
	cairo_text_cluster_t *clusters;
	int clusterCount;
	char *utf8;
	int utf8Count;
	int utf8Max;
	cairo_path_t *textClipPath;
	GBool inUncoloredPattern; // inside a uncolored pattern (PaintType = 2)
	GBool inType3Char; // inside a Type 3 CharProc
	double t3_glyph_wx, t3_glyph_wy;
	GBool t3_glyph_has_bbox;
	double t3_glyph_bbox[4];

	GBool prescaleImages;

	TextPage *text; // text for the current page
	ActualText *actualText;

	cairo_pattern_t *group;
	cairo_pattern_t *shape;
	cairo_pattern_t *mask;
	cairo_matrix_t mask_matrix;
	cairo_surface_t *cairo_shape_surface;
	cairo_t *cairo_shape;
	int knockoutCount;
	struct ColorSpaceStack {
	GBool knockout;
	GfxColorSpace *cs;
	cairo_matrix_t group_matrix;
	struct ColorSpaceStack *next;
	} * groupColorSpaceStack;

	struct MaskStack {
	cairo_pattern_t *mask;
	cairo_matrix_t mask_matrix;
	struct MaskStack *next;
	} *maskStack;

	};

	//------------------------------------------------------------------------
	// CairoImageOutputDev
	//------------------------------------------------------------------------

	//XXX: this should ideally not inherit from CairoOutputDev but use it instead perhaps
	class CairoImageOutputDev: public CairoOutputDev {
	public:

	// Constructor.
	CairoImageOutputDev();

	// Destructor.
	virtual ~CairoImageOutputDev();

	//----- get info about output device

	// Does this device use upside-down coordinates?
	// (Upside-down means (0,0) is the top left corner of the page.)
	virtual GBool upsideDown() { return gTrue; }

	// Does this device use drawChar() or drawString()?
	virtual GBool useDrawChar() { return gFalse; }

	// Does this device use tilingPatternFill()? If this returns false,
	// tiling pattern fills will be reduced to a series of other drawing
	// operations.
	virtual GBool useTilingPatternFill() { return gTrue; }

	// Does this device use functionShadedFill(), axialShadedFill(), and
	// radialShadedFill()? If this returns false, these shaded fills
	// will be reduced to a series of other drawing operations.
	#if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 11, 2)
	virtual GBool useShadedFills(int type) { return type <= 7; }
	#else
	virtual GBool useShadedFills(int type) { return type < 4; }
	#endif

	// Does this device use FillColorStop()?
	virtual GBool useFillColorStop() { return gFalse; }

	// Does this device use beginType3Char/endType3Char? Otherwise,
	// text in Type 3 fonts will be drawn with drawChar/drawString.
	virtual GBool interpretType3Chars() { return gFalse; }

	// Does this device need non-text content?
	virtual GBool needNonText() { return gTrue; }

	//----- save/restore graphics state
	virtual void saveState(GfxState *state) { }
	virtual void restoreState(GfxState *state) { }

	//----- update graphics state
	virtual void updateAll(GfxState *state) { }
	virtual void setDefaultCTM(double *ctm) { }
	virtual void updateCTM(GfxState *state, double m11, double m12,
	double m21, double m22, double m31, double m32) { }
	virtual void updateLineDash(GfxState *state) { }
	virtual void updateFlatness(GfxState *state) { }
	virtual void updateLineJoin(GfxState *state) { }
	virtual void updateLineCap(GfxState *state) { }
	virtual void updateMiterLimit(GfxState *state) { }
	virtual void updateLineWidth(GfxState *state) { }
	virtual void updateFillColor(GfxState *state) { }
	virtual void updateStrokeColor(GfxState *state) { }
	virtual void updateFillOpacity(GfxState *state) { }
	virtual void updateStrokeOpacity(GfxState *state) { }
	virtual void updateBlendMode(GfxState *state) { }

	//----- update text state
	virtual void updateFont(GfxState *state) { }

	//----- path painting
	virtual void stroke(GfxState *state) { }
	virtual void fill(GfxState *state) { }
	virtual void eoFill(GfxState *state) { }
	virtual void clipToStrokePath(GfxState *state) { }
	virtual GBool tilingPatternFill(GfxState state, Gfx gfx, Catalog cat, Object str,
	double pmat, int paintType, int tilingType, Dict resDict,
	double mat, double bbox,
	int x0, int y0, int x1, int y1,
	double xStep, double yStep) { return gTrue; }
	virtual GBool axialShadedFill(GfxState *state,
	GfxAxialShading *shading,
	double tMin, double tMax) { return gTrue; }
	virtual GBool radialShadedFill(GfxState *state,
	GfxRadialShading *shading,
	double sMin, double sMax) { return gTrue; }

	//----- path clipping
	virtual void clip(GfxState *state) { }
	virtual void eoClip(GfxState *state) { }

	//----- image drawing
	virtual void drawImageMask(GfxState state, Object ref, Stream *str,
	int width, int height, GBool invert,
	GBool interpolate, GBool inlineImg);
	virtual void drawImage(GfxState state, Object ref, Stream *str,
	int width, int height, GfxImageColorMap *colorMap,
	GBool interpolate, int *maskColors, GBool inlineImg);
	virtual void drawSoftMaskedImage(GfxState state, Object ref, Stream *str,
	int width, int height,
	GfxImageColorMap *colorMap,
	GBool interpolate,
	Stream *maskStr,
	int maskWidth, int maskHeight,
	GfxImageColorMap *maskColorMap,
	GBool maskInterpolate);
	virtual void drawMaskedImage(GfxState state, Object ref, Stream *str,
	int width, int height,
	GfxImageColorMap *colorMap,
	GBool interpolate,
	Stream *maskStr,
	int maskWidth, int maskHeight,
	GBool maskInvert, GBool maskInterpolate);
	virtual void setSoftMaskFromImageMask(GfxState state, Object ref, Stream *str,
	int width, int height, GBool invert,
	GBool inlineImg, double *baseMatrix);
	virtual void unsetSoftMaskFromImageMask(GfxState state, double baseMatrix) {}


	//----- transparency groups and soft masks
	virtual void beginTransparencyGroup(GfxState * /state/, double * /bbox/,
	GfxColorSpace * /blendingColorSpace/,
	GBool /isolated/, GBool /knockout/,
	GBool /forSoftMask/) {}
	virtual void endTransparencyGroup(GfxState * /state/) {}
	virtual void paintTransparencyGroup(GfxState * /state/, double * /bbox/) {}
	virtual void setSoftMask(GfxState * /state/, double * /bbox/, GBool /alpha/,
	Function * /transferFunc/, GfxColor * /backdropColor/) {}
	virtual void clearSoftMask(GfxState * /state/) {}

	//----- Image list
	// By default images are not rendred
	void setImageDrawDecideCbk(GBool (cbk)(int img_id, void data),
	void *data) { imgDrawCbk = cbk; imgDrawCbkData = data; }
	// Iterate through list of images.
	int getNumImages() const { return numImages; }
	CairoImage *getImage(int i) const { return images[i]; }

	private:
	void saveImage(CairoImage *image);
	void getBBox(GfxState *state, int width, int height,
	double x1, double y1, double x2, double y2);

	CairoImage **images;
	int numImages;
	int size;
	GBool (imgDrawCbk)(int img_id, void data);
	void *imgDrawCbkData;
	};

	#endif