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| 1 /* | |
| 2 * Copyright (C) 2006, 2010 Apple Inc. All rights reserved. | |
| 3 * | |
| 4 * This library is free software; you can redistribute it and/or | |
| 5 * modify it under the terms of the GNU Library General Public | |
| 6 * License as published by the Free Software Foundation; either | |
| 7 * version 2 of the License, or (at your option) any later version. | |
| 8 * | |
| 9 * This library is distributed in the hope that it will be useful, | |
| 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 * Library General Public License for more details. | |
| 13 * | |
| 14 * You should have received a copy of the GNU Library General Public License | |
| 15 * along with this library; see the file COPYING.LIB. If not, write to | |
| 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
| 17 * Boston, MA 02110-1301, USA. | |
| 18 * | |
| 19 */ | |
| 20 | |
| 21 #ifndef FontFallbackList_h | |
| 22 #define FontFallbackList_h | |
| 23 | |
| 24 #include "core/platform/graphics/SimpleFontData.h" | |
| 25 #include "platform/fonts/FontSelector.h" | |
| 26 #include "platform/fonts/WidthCache.h" | |
| 27 #include "wtf/Forward.h" | |
| 28 #include "wtf/MainThread.h" | |
| 29 | |
| 30 namespace WebCore { | |
| 31 | |
| 32 class GlyphPageTreeNode; | |
| 33 class GraphicsContext; | |
| 34 class IntRect; | |
| 35 class FontDescription; | |
| 36 class FontPlatformData; | |
| 37 class FontSelector; | |
| 38 | |
| 39 const int cAllFamiliesScanned = -1; | |
| 40 | |
| 41 class FontFallbackList : public RefCounted<FontFallbackList> { | |
| 42 WTF_MAKE_NONCOPYABLE(FontFallbackList); | |
| 43 public: | |
| 44 typedef HashMap<int, GlyphPageTreeNode*, DefaultHash<int>::Hash> GlyphPages; | |
| 45 | |
| 46 class GlyphPagesStateSaver { | |
| 47 public: | |
| 48 GlyphPagesStateSaver(FontFallbackList& fallbackList) | |
| 49 : m_fallbackList(fallbackList) | |
| 50 , m_pages(fallbackList.m_pages) | |
| 51 , m_pageZero(fallbackList.m_pageZero) | |
| 52 { | |
| 53 } | |
| 54 | |
| 55 ~GlyphPagesStateSaver() | |
| 56 { | |
| 57 m_fallbackList.m_pages = m_pages; | |
| 58 m_fallbackList.m_pageZero = m_pageZero; | |
| 59 } | |
| 60 | |
| 61 private: | |
| 62 FontFallbackList& m_fallbackList; | |
| 63 GlyphPages& m_pages; | |
| 64 GlyphPageTreeNode* m_pageZero; | |
| 65 }; | |
| 66 | |
| 67 static PassRefPtr<FontFallbackList> create() { return adoptRef(new FontFallb
ackList()); } | |
| 68 | |
| 69 ~FontFallbackList() { releaseFontData(); } | |
| 70 void invalidate(PassRefPtr<FontSelector>); | |
| 71 | |
| 72 bool isFixedPitch(const FontDescription& fontDescription) const | |
| 73 { | |
| 74 if (m_pitch == UnknownPitch) | |
| 75 determinePitch(fontDescription); | |
| 76 return m_pitch == FixedPitch; | |
| 77 } | |
| 78 void determinePitch(const FontDescription&) const; | |
| 79 | |
| 80 bool loadingCustomFonts() const; | |
| 81 | |
| 82 FontSelector* fontSelector() const { return m_fontSelector.get(); } | |
| 83 // FIXME: It should be possible to combine fontSelectorVersion and generatio
n. | |
| 84 unsigned fontSelectorVersion() const { return m_fontSelectorVersion; } | |
| 85 unsigned generation() const { return m_generation; } | |
| 86 | |
| 87 WidthCache& widthCache() const { return m_widthCache; } | |
| 88 | |
| 89 private: | |
| 90 FontFallbackList(); | |
| 91 | |
| 92 const SimpleFontData* primarySimpleFontData(const FontDescription& fontDescr
iption) | |
| 93 { | |
| 94 ASSERT(isMainThread()); | |
| 95 if (!m_cachedPrimarySimpleFontData) | |
| 96 m_cachedPrimarySimpleFontData = primaryFontData(fontDescription)->fo
ntDataForCharacter(' '); | |
| 97 return m_cachedPrimarySimpleFontData; | |
| 98 } | |
| 99 | |
| 100 PassRefPtr<FontData> getFontData(const FontDescription&, int& familyIndex) c
onst; | |
| 101 | |
| 102 const FontData* primaryFontData(const FontDescription&) const; | |
| 103 const FontData* fontDataAt(const FontDescription&, unsigned index) const; | |
| 104 | |
| 105 void setPlatformFont(const FontPlatformData&); | |
| 106 | |
| 107 void releaseFontData(); | |
| 108 | |
| 109 mutable Vector<RefPtr<FontData>, 1> m_fontList; | |
| 110 mutable GlyphPages m_pages; | |
| 111 mutable GlyphPageTreeNode* m_pageZero; | |
| 112 mutable const SimpleFontData* m_cachedPrimarySimpleFontData; | |
| 113 RefPtr<FontSelector> m_fontSelector; | |
| 114 mutable WidthCache m_widthCache; | |
| 115 unsigned m_fontSelectorVersion; | |
| 116 mutable int m_familyIndex; | |
| 117 unsigned short m_generation; | |
| 118 mutable unsigned m_pitch : 3; // Pitch | |
| 119 mutable bool m_loadingCustomFonts : 1; | |
| 120 | |
| 121 friend class Font; | |
| 122 }; | |
| 123 | |
| 124 } | |
| 125 | |
| 126 #endif | |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk