1 /*
2 * This file is part of the internal font implementation.
3 *
4 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 *
21 */
22
23 #ifndef SimpleFontData_h
24 #define SimpleFontData_h
25
26 #include "FontData.h"
27 #include "FontPlatformData.h"
28 #include "GlyphPageTreeNode.h"
29 #include "GlyphWidthMap.h"
30 #include <wtf/OwnPtr.h>
31
32 #if USE(ATSUI)
33 typedef struct OpaqueATSUStyle* ATSUStyle;
34 #endif
35
36 #if PLATFORM(WIN)
37 #include <usp10.h>
38 #endif
39
40 #if PLATFORM(CAIRO)
41 #include <cairo.h>
42 #endif
43
44 #if PLATFORM(QT)
45 #include <QFont>
46 #endif
47
48 namespace WebCore {
49
50 class FontDescription;
51 class FontPlatformData;
52 class SharedBuffer;
53 class SVGFontData;
54 class WidthMap;
55
56 enum Pitch { UnknownPitch, FixedPitch, VariablePitch };
57
58 class SimpleFontData : public FontData {
59 public:
60 SimpleFontData(const FontPlatformData&, bool customFont = false, bool loading = false, SVGFontData* data = 0);
61 virtual ~SimpleFontData();
62
63 public:
platformData()64 const FontPlatformData& platformData() const { return m_platformData; }
65 SimpleFontData* smallCapsFontData(const FontDescription& fontDescription) const;
66
67 // vertical metrics
ascent()68 int ascent() const { return m_ascent; }
descent()69 int descent() const { return m_descent; }
lineSpacing()70 int lineSpacing() const { return m_lineSpacing; }
lineGap()71 int lineGap() const { return m_lineGap; }
maxCharWidth()72 float maxCharWidth() const { return m_maxCharWidth; }
avgCharWidth()73 float avgCharWidth() const { return m_avgCharWidth; }
xHeight()74 float xHeight() const { return m_xHeight; }
unitsPerEm()75 unsigned unitsPerEm() const { return m_unitsPerEm; }
76
77 float widthForGlyph(Glyph) const;
78 float platformWidthForGlyph(Glyph) const;
79
spaceWidth()80 float spaceWidth() const { return m_spaceWidth; }
adjustedSpaceWidth()81 float adjustedSpaceWidth() const { return m_adjustedSpaceWidth; }
82
83 #if PLATFORM(CG) || PLATFORM(CAIRO)
syntheticBoldOffset()84 float syntheticBoldOffset() const { return m_syntheticBoldOffset; }
85 #endif
86
spaceGlyph()87 Glyph spaceGlyph() const { return m_spaceGlyph; }
88
89 virtual const SimpleFontData* fontDataForCharacter(UChar32) const;
90 virtual bool containsCharacters(const UChar*, int length) const;
91
92 void determinePitch();
pitch()93 Pitch pitch() const { return m_treatAsFixedPitch ? FixedPitch : VariablePitch; }
94
95 #if ENABLE(SVG_FONTS)
svgFontData()96 SVGFontData* svgFontData() const { return m_svgFontData.get(); }
isSVGFont()97 bool isSVGFont() const { return m_svgFontData; }
98 #else
isSVGFont()99 bool isSVGFont() const { return false; }
100 #endif
101
isCustomFont()102 virtual bool isCustomFont() const { return m_isCustomFont; }
isLoading()103 virtual bool isLoading() const { return m_isLoading; }
104 virtual bool isSegmented() const;
105
missingGlyphData()106 const GlyphData& missingGlyphData() const { return m_missingGlyphData; }
107
108 #ifndef NDEBUG
109 virtual String description() const;
110 #endif
111
112 #if PLATFORM(MAC)
getNSFont()113 NSFont* getNSFont() const { return m_platformData.font(); }
114 #endif
115
116 #if USE(CORE_TEXT)
117 CTFontRef getCTFont() const;
118 CFDictionaryRef getCFStringAttributes() const;
119 #endif
120
121 #if USE(ATSUI)
122 void checkShapesArabic() const;
shapesArabic()123 bool shapesArabic() const
124 {
125 if (!m_checkedShapesArabic)
126 checkShapesArabic();
127 return m_shapesArabic;
128 }
129 #endif
130
131 #if PLATFORM(QT)
getQtFont()132 QFont getQtFont() const { return m_platformData.font(); }
133 #endif
134
135 #if PLATFORM(WIN)
isSystemFont()136 bool isSystemFont() const { return m_isSystemFont; }
137 SCRIPT_FONTPROPERTIES* scriptFontProperties() const;
scriptCache()138 SCRIPT_CACHE* scriptCache() const { return &m_scriptCache; }
139
140 static void setShouldApplyMacAscentHack(bool);
141 static bool shouldApplyMacAscentHack();
142 #endif
143
144 #if PLATFORM(CAIRO)
145 void setFont(cairo_t*) const;
146 #endif
147
148 #if PLATFORM(WX)
getWxFont()149 wxFont* getWxFont() const { return m_platformData.font(); }
150 #endif
151
152 private:
153 void platformInit();
154 void platformGlyphInit();
155 void platformCharWidthInit();
156 void platformDestroy();
157
158 void initCharWidths();
159
160 void commonInit();
161
162 #if PLATFORM(WIN)
163 void initGDIFont();
164 void platformCommonDestroy();
165 float widthForGDIGlyph(Glyph glyph) const;
166 #endif
167
168 int m_ascent;
169 int m_descent;
170 int m_lineSpacing;
171 int m_lineGap;
172 float m_maxCharWidth;
173 float m_avgCharWidth;
174 float m_xHeight;
175 unsigned m_unitsPerEm;
176
177 FontPlatformData m_platformData;
178
179 mutable GlyphWidthMap m_glyphToWidthMap;
180
181 bool m_treatAsFixedPitch;
182
183 #if ENABLE(SVG_FONTS)
184 OwnPtr<SVGFontData> m_svgFontData;
185 #endif
186
187 bool m_isCustomFont; // Whether or not we are custom font loaded via @font-face
188 bool m_isLoading; // Whether or not this custom font is still in the act of loading.
189
190 Glyph m_spaceGlyph;
191 float m_spaceWidth;
192 float m_adjustedSpaceWidth;
193
194 GlyphData m_missingGlyphData;
195
196 mutable SimpleFontData* m_smallCapsFontData;
197
198 #if PLATFORM(CG) || PLATFORM(CAIRO)
199 float m_syntheticBoldOffset;
200 #endif
201
202 #ifdef BUILDING_ON_TIGER
203 public:
204 void* m_styleGroup;
205
206 private:
207 #endif
208
209 #if USE(ATSUI)
210 public:
211 mutable ATSUStyle m_ATSUStyle;
212 mutable bool m_ATSUStyleInitialized;
213 mutable bool m_ATSUMirrors;
214 mutable bool m_checkedShapesArabic;
215 mutable bool m_shapesArabic;
216
217 private:
218 #endif
219
220 #if USE(CORE_TEXT)
221 mutable RetainPtr<CTFontRef> m_CTFont;
222 mutable RetainPtr<CFDictionaryRef> m_CFStringAttributes;
223 #endif
224
225 #if PLATFORM(WIN)
226 bool m_isSystemFont;
227 mutable SCRIPT_CACHE m_scriptCache;
228 mutable SCRIPT_FONTPROPERTIES* m_scriptFontProperties;
229 #endif
230 };
231
232
233 #if !PLATFORM(QT)
widthForGlyph(Glyph glyph)234 ALWAYS_INLINE float SimpleFontData::widthForGlyph(Glyph glyph) const
235 {
236 float width = m_glyphToWidthMap.widthForGlyph(glyph);
237 if (width != cGlyphWidthUnknown)
238 return width;
239
240 width = platformWidthForGlyph(glyph);
241 m_glyphToWidthMap.setWidthForGlyph(glyph, width);
242
243 return width;
244 }
245 #endif
246
247 } // namespace WebCore
248
249 #endif // SimpleFontData_h
250