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//========================================================================
//
// OutputDev.h
//
// Copyright 1996-2003 Glyph & Cog, LLC
//
//========================================================================
#ifndef OUTPUTDEV_H
#define OUTPUTDEV_H
#include <aconf.h>
#ifdef USE_GCC_PRAGMAS
#pragma interface
#endif
#include "gtypes.h"
#include "CharTypes.h"
class GString;
class GfxState;
struct GfxColor;
class GfxColorSpace;
class GfxImageColorMap;
class GfxFunctionShading;
class GfxAxialShading;
class GfxRadialShading;
class Stream;
class Links;
class Link;
class Catalog;
class Page;
class Function;
//------------------------------------------------------------------------
// OutputDev
//------------------------------------------------------------------------
class OutputDev {
public:
// Constructor.
OutputDev() {}
// Destructor.
virtual ~OutputDev() {}
//----- 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() = 0;
// Does this device use drawChar() or drawString()?
virtual GBool useDrawChar() = 0;
// 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 gFalse; }
// 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() { return gFalse; }
// Does this device use drawForm()? If this returns false,
// form-type XObjects will be interpreted (i.e., unrolled).
virtual GBool useDrawForm() { return gFalse; }
// Does this device use beginType3Char/endType3Char? Otherwise,
// text in Type 3 fonts will be drawn with drawChar/drawString.
virtual GBool interpretType3Chars() = 0;
// Does this device need non-text content?
virtual GBool needNonText() { return gTrue; }
//----- initialization and control
// Set default transform matrix.
virtual void setDefaultCTM(double *ctm);
// Check to see if a page slice should be displayed. If this
// returns false, the page display is aborted. Typically, an
// OutputDev will use some alternate means to display the page
// before returning false.
virtual GBool checkPageSlice(Page * /*page*/, double /*hDPI*/, double /*vDPI*/,
int /*rotate*/, GBool /*useMediaBox*/, GBool /*crop*/,
int /*sliceX*/, int /*sliceY*/, int /*sliceW*/, int /*sliceH*/,
GBool /*printing*/, Catalog * /*catalog*/,
GBool (* /*abortCheckCbk*/)(void *data) = NULL,
void * /*abortCheckCbkData*/ = NULL)
{ return gTrue; }
// Start a page.
virtual void startPage(int /*pageNum*/, GfxState * /*state*/) {}
// End a page.
virtual void endPage() {}
// Dump page contents to display.
virtual void dump() {}
//----- coordinate conversion
// Convert between device and user coordinates.
virtual void cvtDevToUser(double dx, double dy, double *ux, double *uy);
virtual void cvtUserToDev(double ux, double uy, int *dx, int *dy);
double *getDefCTM() { return defCTM; }
double *getDefICTM() { return defICTM; }
//----- save/restore graphics state
virtual void saveState(GfxState * /*state*/) {}
virtual void restoreState(GfxState * /*state*/) {}
//----- update graphics state
virtual void updateAll(GfxState *state);
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 updateStrokeAdjust(GfxState * /*state*/) {}
virtual void updateFillColorSpace(GfxState * /*state*/) {}
virtual void updateStrokeColorSpace(GfxState * /*state*/) {}
virtual void updateFillColor(GfxState * /*state*/) {}
virtual void updateStrokeColor(GfxState * /*state*/) {}
virtual void updateBlendMode(GfxState * /*state*/) {}
virtual void updateFillOpacity(GfxState * /*state*/) {}
virtual void updateStrokeOpacity(GfxState * /*state*/) {}
virtual void updateFillOverprint(GfxState * /*state*/) {}
virtual void updateStrokeOverprint(GfxState * /*state*/) {}
virtual void updateTransfer(GfxState * /*state*/) {}
//----- update text state
virtual void updateFont(GfxState * /*state*/) {}
virtual void updateTextMat(GfxState * /*state*/) {}
virtual void updateCharSpace(GfxState * /*state*/) {}
virtual void updateRender(GfxState * /*state*/) {}
virtual void updateRise(GfxState * /*state*/) {}
virtual void updateWordSpace(GfxState * /*state*/) {}
virtual void updateHorizScaling(GfxState * /*state*/) {}
virtual void updateTextPos(GfxState * /*state*/) {}
virtual void updateTextShift(GfxState * /*state*/, double /*shift*/) {}
//----- path painting
virtual void stroke(GfxState * /*state*/) {}
virtual void fill(GfxState * /*state*/) {}
virtual void eoFill(GfxState * /*state*/) {}
virtual void 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 functionShadedFill(GfxState * /*state*/,
GfxFunctionShading * /*shading*/)
{ return gFalse; }
virtual GBool axialShadedFill(GfxState * /*state*/, GfxAxialShading * /*shading*/)
{ return gFalse; }
virtual GBool radialShadedFill(GfxState * /*state*/, GfxRadialShading * /*shading*/)
{ return gFalse; }
//----- path clipping
virtual void clip(GfxState * /*state*/) {}
virtual void eoClip(GfxState * /*state*/) {}
virtual void clipToStrokePath(GfxState * /*state*/) {}
//----- text drawing
virtual void beginStringOp(GfxState * /*state*/) {}
virtual void endStringOp(GfxState * /*state*/) {}
virtual void beginString(GfxState * /*state*/, GString * /*s*/) {}
virtual void endString(GfxState * /*state*/) {}
virtual 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 void drawString(GfxState * /*state*/, GString * /*s*/) {}
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 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);
#if OPI_SUPPORT
//----- OPI functions
virtual void opiBegin(GfxState *state, Dict *opiDict);
virtual void opiEnd(GfxState *state, Dict *opiDict);
#endif
//----- 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*/) {}
//----- form XObjects
virtual void drawForm(Ref /*id*/) {}
//----- PostScript XObjects
virtual void psXObject(Stream * /*psStream*/, Stream * /*level1Stream*/) {}
//----- 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*/) {}
//----- links
virtual void processLink(Link * /*link*/, Catalog * /*catalog*/) {}
#if 1 //~tmp: turn off anti-aliasing temporarily
virtual GBool getVectorAntialias() { return gFalse; }
virtual void setVectorAntialias(GBool /*vaa*/) {}
#endif
private:
double defCTM[6]; // default coordinate transform matrix
double defICTM[6]; // inverse of default CTM
};
#endif
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