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//========================================================================
//
// PreScanOutputDev.h
//
// Copyright 2005 Glyph & Cog, LLC
//
//========================================================================
#ifndef PRESCANOUTPUTDEV_H
#define PRESCANOUTPUTDEV_H
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
#include "gtypes.h"
#include "GfxState.h"
#include "OutputDev.h"
//------------------------------------------------------------------------
// PreScanOutputDev
//------------------------------------------------------------------------
class PreScanOutputDev: public OutputDev {
public:
// Constructor.
PreScanOutputDev();
// Destructor.
virtual ~PreScanOutputDev();
//----- 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();
//----- 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
virtual void beginStringOp(GfxState *state);
virtual void endStringOp(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);
//----- 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 drawMaskedImage(GfxState *state, Object *ref, Stream *str,
int width, int height,
GfxImageColorMap *colorMap,
Stream *maskStr, int maskWidth, int maskHeight,
GBool maskInvert);
virtual void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
int width, int height,
GfxImageColorMap *colorMap,
Stream *maskStr,
int maskWidth, int maskHeight,
GfxImageColorMap *maskColorMap);
//----- transparency groups and soft masks
virtual void beginTransparencyGroup(GfxState *state, double *bbox,
GfxColorSpace *blendingColorSpace,
GBool isolated, GBool knockout,
GBool forSoftMask);
//----- special access
// Returns true if the operations performed since the last call to
// clearStats() are all monochrome (black or white).
GBool isMonochrome() { return mono; }
// Returns true if the operations performed since the last call to
// clearStats() are all gray.
GBool isGray() { return gray; }
// Returns true if the operations performed since the last call to
// clearStats() included any transparency.
GBool usesTransparency() { return transparency; }
// Returns true if the operations performed since the last call to
// clearStats() are all rasterizable by GDI calls in GDIOutputDev.
GBool isAllGDI() { return gdi; }
// Clear the stats used by the above functions.
void clearStats();
private:
void check(GfxColorSpace *colorSpace, GfxColor *color,
double opacity, GfxBlendMode blendMode);
GBool mono;
GBool gray;
GBool transparency;
GBool gdi;
};
#endif
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