filters

OutputDev.h
1//========================================================================
2//
3// OutputDev.h
4//
5// Copyright 1996-2002 Glyph & Cog, LLC
6//
7//========================================================================
8
9#ifndef OUTPUTDEV_H
10#define OUTPUTDEV_H
11
12#include <aconf.h>
13
14#ifdef USE_GCC_PRAGMAS
15#pragma interface
16#endif
17
18#include "gtypes.h"
19#include "CharTypes.h"
20
21class GString;
22class GfxState;
23class GfxColorSpace;
24class GfxImageColorMap;
25class Stream;
26class Link;
27class Catalog;
28
29//------------------------------------------------------------------------
30// OutputDev
31//------------------------------------------------------------------------
32
33class OutputDev {
34public:
35
36 // Constructor.
37 OutputDev() {}
38
39 // Destructor.
40 virtual ~OutputDev() {}
41
42 //----- get info about output device
43
44 // Does this device use upside-down coordinates?
45 // (Upside-down means (0,0) is the top left corner of the page.)
46 virtual GBool upsideDown() = 0;
47
48 // Does this device use drawChar() or drawString()?
49 virtual GBool useDrawChar() = 0;
50
51 // Does this device use beginType3Char/endType3Char? Otherwise,
52 // text in Type 3 fonts will be drawn with drawChar/drawString.
53 virtual GBool interpretType3Chars() = 0;
54
55 // Does this device need non-text content?
56 virtual GBool needNonText() { return gTrue; }
57
58 //----- initialization and control
59
60 // Set default transform matrix.
61 virtual void setDefaultCTM(const double *ctm);
62
63 // Start a page.
64 virtual void startPage(int /*pageNum*/, GfxState */*state*/) {}
65
66 // End a page.
67 virtual void endPage() {}
68
69 // Dump page contents to display.
70 virtual void dump() {}
71
72 //----- coordinate conversion
73
74 // Convert between device and user coordinates.
75 virtual void cvtDevToUser(int dx, int dy, double *ux, double *uy);
76 virtual void cvtUserToDev(double ux, double uy, int *dx, int *dy);
77
78 //----- link borders
79 virtual void drawLink(Link */*link*/, Catalog */*catalog*/) {}
80
81 //----- save/restore graphics state
82 virtual void saveState(GfxState */*state*/) {}
83 virtual void restoreState(GfxState */*state*/) {}
84
85 //----- update graphics state
86 virtual void updateAll(GfxState *state);
87 virtual void updateCTM(GfxState */*state*/, double /*m11*/, double /*m12*/,
88 double /*m21*/, double /*m22*/, double /*m31*/, double /*m32*/) {}
89 virtual void updateLineDash(GfxState */*state*/) {}
90 virtual void updateFlatness(GfxState */*state*/) {}
91 virtual void updateLineJoin(GfxState */*state*/) {}
92 virtual void updateLineCap(GfxState */*state*/) {}
93 virtual void updateMiterLimit(GfxState */*state*/) {}
94 virtual void updateLineWidth(GfxState */*state*/) {}
95 virtual void updateFillColor(GfxState */*state*/) {}
96 virtual void updateStrokeColor(GfxState */*state*/) {}
97 virtual void updateFillOpacity(GfxState */*state*/) {}
98 virtual void updateStrokeOpacity(GfxState */*state*/) {}
99
100 //----- update text state
101 virtual void updateFont(GfxState */*state*/) {}
102 virtual void updateTextMat(GfxState */*state*/) {}
103 virtual void updateCharSpace(GfxState */*state*/) {}
104 virtual void updateRender(GfxState */*state*/) {}
105 virtual void updateRise(GfxState */*state*/) {}
106 virtual void updateWordSpace(GfxState */*state*/) {}
107 virtual void updateHorizScaling(GfxState */*state*/) {}
108 virtual void updateTextPos(GfxState */*state*/) {}
109 virtual void updateTextShift(GfxState */*state*/, double /*shift*/) {}
110
111 //----- path painting
112 virtual void stroke(GfxState */*state*/) {}
113 virtual void fill(GfxState */*state*/) {}
114 virtual void eoFill(GfxState */*state*/) {}
115
116 //----- path clipping
117 virtual void clip(GfxState */*state*/) {}
118 virtual void eoClip(GfxState */*state*/) {}
119
120 //----- text drawing
121 virtual void beginString(GfxState */*state*/, GString */*s*/) {}
122 virtual void endString(GfxState */*state*/) {}
123 virtual void drawChar(GfxState */*state*/, double /*x*/, double /*y*/,
124 double /*dx*/, double /*dy*/,
125 double /*originX*/, double /*originY*/,
126 CharCode /*code*/, Unicode */*u*/, int /*uLen*/) {}
127 virtual void drawString(GfxState */*state*/, GString */*s*/) {}
128 virtual GBool beginType3Char(GfxState *state,
129 CharCode code, Unicode *u, int uLen);
130 virtual void endType3Char(GfxState */*state*/) {}
131
132 //----- image drawing
133 virtual void drawImageMask(GfxState *state, Object *ref, Stream *str,
134 int width, int height, GBool invert,
135 GBool inlineImg);
136 virtual void drawImage(GfxState *state, Object *ref, Stream *str,
137 int width, int height, GfxImageColorMap *colorMap,
138 int *maskColors, GBool inlineImg);
139
140#ifdef OPI_SUPPORT
141 //----- OPI functions
142 virtual void opiBegin(GfxState *state, Dict *opiDict);
143 virtual void opiEnd(GfxState *state, Dict *opiDict);
144#endif
145
146 //----- Type 3 font operators
147 virtual void type3D0(GfxState */*state*/, double /*wx*/, double /*wy*/) {}
148 virtual void type3D1(GfxState */*state*/, double /*wx*/, double /*wy*/,
149 double /*llx*/, double /*lly*/, double /*urx*/, double /*ury*/) {}
150
151 //----- PostScript XObjects
152 virtual void psXObject(Stream */*psStream*/, Stream */*level1Stream*/) {}
153
154private:
155
156 double defCTM[6]; // default coordinate transform matrix
157 double defICTM[6]; // inverse of default CTM
158};
159
160#endif