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1 
2 /*
3  *******************************************************************************
4  *
5  *   © 2016 and later: Unicode, Inc. and others.
6  *   License & terms of use: http://www.unicode.org/copyright.html#License
7  *
8  *******************************************************************************
9  *******************************************************************************
10  *
11  *   Copyright (C) 1999-2006, International Business Machines
12  *   Corporation and others.  All Rights Reserved.
13  *
14  *******************************************************************************
15  *   file name:  GnomeFontInstance.h
16  *
17  *   created on: 08/30/2001
18  *   created by: Eric R. Mader
19  */
20 
21 #ifndef __GNOMEFONTINSTANCE_H
22 #define __GNOMEFONTINSTANCE_H
23 
24 #include <gnome.h>
25 #include <ft2build.h>
26 #include FT_FREETYPE_H
27 #include FT_GLYPH_H
28 #include <cairo.h>
29 
30 #include "layout/LETypes.h"
31 #include "layout/LEFontInstance.h"
32 
33 #include "RenderingSurface.h"
34 #include "FontTableCache.h"
35 #include "cmaps.h"
36 
37 class GnomeSurface : public RenderingSurface
38 {
39 public:
40     GnomeSurface(GtkWidget *theWidget);
41     virtual ~GnomeSurface();
42 
43     virtual void drawGlyphs(const LEFontInstance *font, const LEGlyphID *glyphs, le_int32 count,
44         const float *positions, le_int32 x, le_int32 y, le_int32 width, le_int32 height);
45 
46     GtkWidget *getWidget() const;
47     void setWidget(GtkWidget *theWidget);
48 
49 private:
50     GtkWidget *fWidget;
51     cairo_t   *fCairo;
52 };
53 
54 class GnomeFontInstance : public LEFontInstance, protected FontTableCache
55 {
56  protected:
57     FT_Face fFace;
58 //  FT_Glyph fGlyph;
59 
60     cairo_font_face_t *fCairoFace;
61 
62     le_int32 fPointSize;
63     le_int32 fUnitsPerEM;
64     le_int32 fAscent;
65     le_int32 fDescent;
66     le_int32 fLeading;
67 
68     float fDeviceScaleX;
69     float fDeviceScaleY;
70 
71     CMAPMapper *fMapper;
72 
73     virtual const void *readFontTable(LETag tableTag) const;
74 
75     virtual LEErrorCode initMapper();
76 
77  public:
78     GnomeFontInstance(FT_Library engine, const char *fontPathName, le_int16 pointSize, LEErrorCode &status);
79 
80     virtual ~GnomeFontInstance();
81 
82     virtual const void *getFontTable(LETag tableTag) const;
83 
84     virtual le_int32 getUnitsPerEM() const;
85 
86     virtual le_int32 getAscent() const;
87 
88     virtual le_int32 getDescent() const;
89 
90     virtual le_int32 getLeading() const;
91 
92     virtual LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
93 
94     virtual void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
95 
96     virtual le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
97 
98     float getXPixelsPerEm() const;
99 
100     float getYPixelsPerEm() const;
101 
102     float getScaleFactorX() const;
103 
104     float getScaleFactorY() const;
105 
106     void rasterizeGlyphs(cairo_t *cairo, const LEGlyphID *glyphs, le_int32 glyphCount, const float *positions,
107 				   le_int32 x, le_int32 y) const;
108 };
109 
getWidget()110 inline GtkWidget *GnomeSurface::getWidget() const
111 {
112     return fWidget;
113 }
114 
setWidget(GtkWidget * theWidget)115 inline void GnomeSurface::setWidget(GtkWidget *theWidget)
116 {
117     fWidget = theWidget;
118 }
119 
120 /*
121 inline FT_Instance GnomeFontInstance::getFont() const
122 {
123     return fInstance;
124 }
125 */
126 
getUnitsPerEM()127 inline le_int32 GnomeFontInstance::getUnitsPerEM() const
128 {
129     return fUnitsPerEM;
130 }
131 
getAscent()132 inline le_int32 GnomeFontInstance::getAscent() const
133 {
134     return fAscent;
135 }
136 
getDescent()137 inline le_int32 GnomeFontInstance::getDescent() const
138 {
139     return fDescent;
140 }
141 
getLeading()142 inline le_int32 GnomeFontInstance::getLeading() const
143 {
144     return fLeading;
145 }
146 
mapCharToGlyph(LEUnicode32 ch)147 inline LEGlyphID GnomeFontInstance::mapCharToGlyph(LEUnicode32 ch) const
148 {
149     return fMapper->unicodeToGlyph(ch);
150 }
151 
getXPixelsPerEm()152 inline float GnomeFontInstance::getXPixelsPerEm() const
153 {
154     return (float) fPointSize;
155 }
156 
getYPixelsPerEm()157 inline float GnomeFontInstance::getYPixelsPerEm() const
158 {
159     return  (float) fPointSize;
160 }
161 
getScaleFactorX()162 inline float GnomeFontInstance::getScaleFactorX() const
163 {
164     return fDeviceScaleX;
165 }
166 
getScaleFactorY()167 inline float GnomeFontInstance::getScaleFactorY() const
168 {
169     return fDeviceScaleY;
170 }
171 
172 #endif
173