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250 lines
8.6 KiB
250 lines
8.6 KiB
//========================================================================
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//
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// OutputDev.h
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//
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// Copyright 1996-2003 Glyph & Cog, LLC
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//
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//========================================================================
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#ifndef OUTPUTDEV_H
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#define OUTPUTDEV_H
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#include <aconf.h>
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#ifdef USE_GCC_PRAGMAS
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#pragma interface
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#endif
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#include "gtypes.h"
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#include "CharTypes.h"
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class GString;
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class GfxState;
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struct GfxColor;
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class GfxColorSpace;
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class GfxImageColorMap;
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class GfxFunctionShading;
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class GfxAxialShading;
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class GfxRadialShading;
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class Stream;
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class Links;
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class Link;
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class Catalog;
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class Page;
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class Function;
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//------------------------------------------------------------------------
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// OutputDev
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//------------------------------------------------------------------------
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class OutputDev {
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public:
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// Constructor.
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OutputDev() {}
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// Destructor.
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virtual ~OutputDev() {}
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//----- get info about output device
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// Does this device use upside-down coordinates?
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// (Upside-down means (0,0) is the top left corner of the page.)
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virtual GBool upsideDown() = 0;
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// Does this device use drawChar() or drawString()?
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virtual GBool useDrawChar() = 0;
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// Does this device use tilingPatternFill()? If this returns false,
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// tiling pattern fills will be reduced to a series of other drawing
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// operations.
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virtual GBool useTilingPatternFill() { return gFalse; }
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// Does this device use functionShadedFill(), axialShadedFill(), and
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// radialShadedFill()? If this returns false, these shaded fills
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// will be reduced to a series of other drawing operations.
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virtual GBool useShadedFills() { return gFalse; }
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// Does this device use drawForm()? If this returns false,
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// form-type XObjects will be interpreted (i.e., unrolled).
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virtual GBool useDrawForm() { return gFalse; }
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// Does this device use beginType3Char/endType3Char? Otherwise,
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// text in Type 3 fonts will be drawn with drawChar/drawString.
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virtual GBool interpretType3Chars() = 0;
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// Does this device need non-text content?
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virtual GBool needNonText() { return gTrue; }
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//----- initialization and control
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// Set default transform matrix.
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virtual void setDefaultCTM(double *ctm);
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// Check to see if a page slice should be displayed. If this
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// returns false, the page display is aborted. Typically, an
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// OutputDev will use some alternate means to display the page
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// before returning false.
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virtual GBool checkPageSlice(Page *page, double hDPI, double vDPI,
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int rotate, GBool useMediaBox, GBool crop,
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int sliceX, int sliceY, int sliceW, int sliceH,
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GBool printing, Catalog *catalog,
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GBool (*abortCheckCbk)(void *data) = NULL,
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void *abortCheckCbkData = NULL)
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{ return gTrue; }
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// Start a page.
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virtual void startPage(int pageNum, GfxState *state) {}
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// End a page.
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virtual void endPage() {}
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// Dump page contents to display.
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virtual void dump() {}
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//----- coordinate conversion
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// Convert between device and user coordinates.
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virtual void cvtDevToUser(double dx, double dy, double *ux, double *uy);
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virtual void cvtUserToDev(double ux, double uy, int *dx, int *dy);
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double *getDefCTM() { return defCTM; }
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double *getDefICTM() { return defICTM; }
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//----- save/restore graphics state
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virtual void saveState(GfxState *state) {}
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virtual void restoreState(GfxState *state) {}
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//----- update graphics state
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virtual void updateAll(GfxState *state);
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virtual void updateCTM(GfxState *state, double m11, double m12,
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double m21, double m22, double m31, double m32) {}
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virtual void updateLineDash(GfxState *state) {}
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virtual void updateFlatness(GfxState *state) {}
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virtual void updateLineJoin(GfxState *state) {}
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virtual void updateLineCap(GfxState *state) {}
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virtual void updateMiterLimit(GfxState *state) {}
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virtual void updateLineWidth(GfxState *state) {}
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virtual void updateStrokeAdjust(GfxState *state) {}
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virtual void updateFillColorSpace(GfxState *state) {}
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virtual void updateStrokeColorSpace(GfxState *state) {}
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virtual void updateFillColor(GfxState *state) {}
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virtual void updateStrokeColor(GfxState *state) {}
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virtual void updateBlendMode(GfxState *state) {}
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virtual void updateFillOpacity(GfxState *state) {}
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virtual void updateStrokeOpacity(GfxState *state) {}
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virtual void updateFillOverprint(GfxState *state) {}
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virtual void updateStrokeOverprint(GfxState *state) {}
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virtual void updateTransfer(GfxState *state) {}
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//----- update text state
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virtual void updateFont(GfxState *state) {}
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virtual void updateTextMat(GfxState *state) {}
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virtual void updateCharSpace(GfxState *state) {}
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virtual void updateRender(GfxState *state) {}
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virtual void updateRise(GfxState *state) {}
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virtual void updateWordSpace(GfxState *state) {}
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virtual void updateHorizScaling(GfxState *state) {}
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virtual void updateTextPos(GfxState *state) {}
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virtual void updateTextShift(GfxState *state, double shift) {}
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//----- path painting
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virtual void stroke(GfxState *state) {}
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virtual void fill(GfxState *state) {}
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virtual void eoFill(GfxState *state) {}
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virtual void tilingPatternFill(GfxState *state, Object *str,
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int paintType, Dict *resDict,
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double *mat, double *bbox,
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int x0, int y0, int x1, int y1,
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double xStep, double yStep) {}
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virtual GBool functionShadedFill(GfxState *state,
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GfxFunctionShading *shading)
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{ return gFalse; }
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virtual GBool axialShadedFill(GfxState *state, GfxAxialShading *shading)
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{ return gFalse; }
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virtual GBool radialShadedFill(GfxState *state, GfxRadialShading *shading)
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{ return gFalse; }
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//----- path clipping
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virtual void clip(GfxState *state) {}
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virtual void eoClip(GfxState *state) {}
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virtual void clipToStrokePath(GfxState *state) {}
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//----- text drawing
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virtual void beginStringOp(GfxState *state) {}
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virtual void endStringOp(GfxState *state) {}
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virtual void beginString(GfxState *state, GString *s) {}
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virtual void endString(GfxState *state) {}
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virtual void drawChar(GfxState *state, double x, double y,
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double dx, double dy,
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double originX, double originY,
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CharCode code, int nBytes, Unicode *u, int uLen) {}
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virtual void drawString(GfxState *state, GString *s) {}
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virtual GBool beginType3Char(GfxState *state, double x, double y,
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double dx, double dy,
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CharCode code, Unicode *u, int uLen);
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virtual void endType3Char(GfxState *state) {}
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virtual void endTextObject(GfxState *state) {}
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//----- image drawing
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virtual void drawImageMask(GfxState *state, Object *ref, Stream *str,
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int width, int height, GBool invert,
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GBool inlineImg);
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virtual void drawImage(GfxState *state, Object *ref, Stream *str,
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int width, int height, GfxImageColorMap *colorMap,
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int *maskColors, GBool inlineImg);
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virtual void drawMaskedImage(GfxState *state, Object *ref, Stream *str,
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int width, int height,
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GfxImageColorMap *colorMap,
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Stream *maskStr, int maskWidth, int maskHeight,
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GBool maskInvert);
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virtual void drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
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int width, int height,
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GfxImageColorMap *colorMap,
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Stream *maskStr,
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int maskWidth, int maskHeight,
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GfxImageColorMap *maskColorMap);
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#if OPI_SUPPORT
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//----- OPI functions
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virtual void opiBegin(GfxState *state, Dict *opiDict);
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virtual void opiEnd(GfxState *state, Dict *opiDict);
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#endif
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//----- Type 3 font operators
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virtual void type3D0(GfxState *state, double wx, double wy) {}
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virtual void type3D1(GfxState *state, double wx, double wy,
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double llx, double lly, double urx, double ury) {}
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//----- form XObjects
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virtual void drawForm(Ref id) {}
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//----- PostScript XObjects
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virtual void psXObject(Stream *psStream, Stream *level1Stream) {}
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//----- transparency groups and soft masks
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virtual void beginTransparencyGroup(GfxState *state, double *bbox,
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GfxColorSpace *blendingColorSpace,
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GBool isolated, GBool knockout,
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GBool forSoftMask) {}
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virtual void endTransparencyGroup(GfxState *state) {}
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virtual void paintTransparencyGroup(GfxState *state, double *bbox) {}
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virtual void setSoftMask(GfxState *state, double *bbox, GBool alpha,
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Function *transferFunc, GfxColor *backdropColor) {}
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virtual void clearSoftMask(GfxState *state) {}
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//----- links
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virtual void processLink(Link *link, Catalog *catalog) {}
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#if 1 //~tmp: turn off anti-aliasing temporarily
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virtual GBool getVectorAntialias() { return gFalse; }
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virtual void setVectorAntialias(GBool vaa) {}
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#endif
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private:
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double defCTM[6]; // default coordinate transform matrix
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double defICTM[6]; // inverse of default CTM
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};
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#endif
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