//======================================================================== // // OutputDev.h // // Copyright 1996-2003 Glyph & Cog, LLC // //======================================================================== #ifndef OUTPUTDEV_H #define OUTPUTDEV_H #include #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