1 //========================================================================
5 // Copyright 1996 Derek B. Noonburg
7 //========================================================================
21 class GfxImageColorMap;
24 //------------------------------------------------------------------------
26 //------------------------------------------------------------------------
35 virtual ~OutputDev() {}
37 //----- get info about output device
39 // Does this device use upside-down coordinates?
40 // (Upside-down means (0,0) is the top left corner of the page.)
41 virtual GBool upsideDown() = 0;
43 // Does this device use drawChar() or drawString()?
44 virtual GBool useDrawChar() = 0;
46 //----- initialization and control
48 // Set default transform matrix.
49 virtual void setDefaultCTM(double *ctm1);
52 virtual void startPage(int pageNum, GfxState *state) {}
55 virtual void endPage() {}
57 // Dump page contents to display.
58 virtual void dump() {}
60 //----- coordinate conversion
62 // Convert between device and user coordinates.
63 virtual void cvtDevToUser(int dx, int dy, double *ux, double *uy);
64 virtual void cvtUserToDev(double ux, double uy, int *dx, int *dy);
67 virtual void drawLinkBorder(double x1, double y1, double x2, double y2,
70 //----- save/restore graphics state
71 virtual void saveState(GfxState *state) {}
72 virtual void restoreState(GfxState *state) {}
74 //----- update graphics state
75 virtual void updateAll(GfxState *state);
76 virtual void updateCTM(GfxState *state, double m11, double m12,
77 double m21, double m22, double m31, double m32) {}
78 virtual void updateLineDash(GfxState *state) {}
79 virtual void updateFlatness(GfxState *state) {}
80 virtual void updateLineJoin(GfxState *state) {}
81 virtual void updateLineCap(GfxState *state) {}
82 virtual void updateMiterLimit(GfxState *state) {}
83 virtual void updateLineWidth(GfxState *state) {}
84 virtual void updateFillColor(GfxState *state) {}
85 virtual void updateStrokeColor(GfxState *state) {}
87 //----- update text state
88 virtual void updateFont(GfxState *state) {}
89 virtual void updateTextMat(GfxState *state) {}
90 virtual void updateCharSpace(GfxState *state) {}
91 virtual void updateRender(GfxState *state) {}
92 virtual void updateRise(GfxState *state) {}
93 virtual void updateWordSpace(GfxState *state) {}
94 virtual void updateHorizScaling(GfxState *state) {}
95 virtual void updateTextPos(GfxState *state) {}
96 virtual void updateTextShift(GfxState *state, double shift) {}
99 virtual void stroke(GfxState *state) {}
100 virtual void fill(GfxState *state) {}
101 virtual void eoFill(GfxState *state) {}
103 //----- path clipping
104 virtual void clip(GfxState *state) {}
105 virtual void eoClip(GfxState *state) {}
108 virtual void beginString(GfxState *state, GString *s) {}
109 virtual void endString(GfxState *state) {}
110 virtual void drawChar(GfxState *state, double x, double y,
111 double dx, double dy, Guchar c) {}
112 virtual void drawChar16(GfxState *state, double x, double y,
113 double dx, double dy, int c) {}
114 virtual void drawString(GfxState *state, GString *s) {}
115 virtual void drawString16(GfxState *state, GString *s) {}
117 //----- image drawing
118 virtual void drawImageMask(GfxState *state, Stream *str,
119 int width, int height, GBool invert,
121 virtual void drawImage(GfxState *state, Stream *str, int width,
122 int height, GfxImageColorMap *colorMap,
127 double ctm[6]; // coordinate transform matrix
128 double ictm[6]; // inverse CTM