poppler/CairoOutputDev.h

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

#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 "GfxState.h"

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

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

//------------------------------------------------------------------------
// 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 beginType3Char/endType3Char?  Otherwise,
  // text in Type 3 fonts will be drawn with drawChar/drawString.
  virtual GBool interpretType3Chars() { return gTrue; }

  //----- 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);

  //----- 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);

  //----- 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 endTextObject(GfxState *state);

  //----- image drawing
  virtual void drawImageMask(GfxState *state, Object *ref, Stream *str,
			     int width, int height, GBool invert,
			     GBool inlineImg);
  virtual void drawImage(GfxState *state, Object *ref, Stream *str,
			 int width, int height, GfxImageColorMap *colorMap,
			 int *maskColors, GBool inlineImg);
  virtual void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
				int width, int height,
				GfxImageColorMap *colorMap,
				Stream *maskStr,
				int maskWidth, int maskHeight,
				GfxImageColorMap *maskColorMap);

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


  //----- 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);
 
  GBool isReverseVideo() { return gFalse; }
  
  void setCairo (cairo_t *cr);

protected:
  void doPath(GfxState *state, GfxPath *path);
  
  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

  FT_Library ft_lib;
  CairoFontEngine *fontEngine;
  cairo_t *cairo;
  GBool needFontUpdate;                // set when the font needs to be updated
  cairo_surface_t *surface;
  cairo_glyph_t *glyphs;
  int glyphCount;
  cairo_path_t *textClipPath;
};

#endif