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//========================================================================
//
// 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) 2006-2010 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2008, 2009, 2011 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2008 Michael Vrable <mvrable@cs.ucsd.edu>
// Copyright (C) 2010 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 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.
virtual GBool useShadedFills(int type) { return type < 4; }
// 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; }
//----- initialization and control
// Start a page.
virtual void startPage(int pageNum, GfxState *state);
// End a page.
virtual void endPage();
//----- link borders
virtual void drawLink(Link *link, Catalog *catalog);
//----- 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, Object *str,
int paintType, 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);
//----- 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);
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 GBool deviceHasTextClip(GfxState *state) { return textClipPath && haveCSPattern; }
virtual void endTextObject(GfxState *state);
// If current colorspace is pattern,
// does this device support text in pattern colorspace?
virtual GBool supportTextCSPattern(GfxState *state) {
return state->getFillColorSpace()->getMode() == csPattern; }
// If current colorspace is pattern,
// need this device special handling for masks in pattern colorspace?
virtual GBool fillMaskCSPattern(GfxState * state) {
return state->getFillColorSpace()->getMode() == csPattern; }
virtual void endMaskClip(GfxState *state);
//----- grouping operators
virtual void beginMarkedContent(char *name, Dict *properties);
virtual void endMarkedContent(GfxState *state);
//----- image drawing
virtual void drawImageMask(GfxState *state, Object *ref, Stream *str,
int width, int height, GBool invert, GBool interpolate,
GBool inlineImg);
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(XRef *xrefA, Catalog *catalogA, 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(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, cairo_surface_t *image);
GfxRGB fill_color, stroke_color;
cairo_pattern_t *fill_pattern, *stroke_pattern;
double fill_opacity;
double stroke_opacity;
CairoFont *currentFont;
XRef *xref; // xref table for current document
Catalog *catalog;
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;
cairo_surface_t *surface;
cairo_glyph_t *glyphs;
int glyphCount;
cairo_path_t *textClipPath;
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_surface_t *cairo_shape_surface;
cairo_t *cairo_shape;
int knockoutCount;
struct ColorSpaceStack {
GBool knockout;
GfxColorSpace *cs;
struct ColorSpaceStack *next;
} * groupColorSpaceStack;
struct MaskStack {
cairo_pattern_t *mask;
struct MaskStack *next;
} *maskStack;
GBool haveCSPattern; // set if text has been drawn with a
// clipping render mode because of pattern colorspace
};
//------------------------------------------------------------------------
// 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.
virtual GBool useShadedFills(int type) { return type < 4; }
// 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; }
//----- link borders
virtual void drawLink(Link *link, Catalog *catalog) { }
//----- 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 GBool tilingPatternFill(GfxState *state, Object *str,
int paintType, 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);
//----- 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);
CairoImage **images;
int numImages;
int size;
GBool (*imgDrawCbk)(int img_id, void *data);
void *imgDrawCbkData;
};
#endif
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