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comparison: gfx/skia/trunk/src/gpu/GrTextStrike.h
gfx/skia/trunk/src/gpu/GrTextStrike.h
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| -1:000000000000 | 0:02a3e0496c00 |
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| 1 | |
| 2 /* | |
| 3 * Copyright 2010 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 | |
| 11 #ifndef GrTextStrike_DEFINED | |
| 12 #define GrTextStrike_DEFINED | |
| 13 | |
| 14 #include "GrAllocPool.h" | |
| 15 #include "GrFontScaler.h" | |
| 16 #include "GrTHashTable.h" | |
| 17 #include "GrPoint.h" | |
| 18 #include "GrGlyph.h" | |
| 19 #include "GrDrawTarget.h" | |
| 20 #include "GrAtlas.h" | |
| 21 | |
| 22 class GrFontCache; | |
| 23 class GrGpu; | |
| 24 class GrFontPurgeListener; | |
| 25 | |
| 26 /** | |
| 27 * The textcache maps a hostfontscaler instance to a dictionary of | |
| 28 * glyphid->strike | |
| 29 */ | |
| 30 class GrTextStrike { | |
| 31 public: | |
| 32 GrTextStrike(GrFontCache*, const GrKey* fontScalerKey, GrMaskFormat, GrAtlasMgr*); | |
| 33 ~GrTextStrike(); | |
| 34 | |
| 35 const GrKey* getFontScalerKey() const { return fFontScalerKey; } | |
| 36 GrFontCache* getFontCache() const { return fFontCache; } | |
| 37 GrMaskFormat getMaskFormat() const { return fMaskFormat; } | |
| 38 | |
| 39 inline GrGlyph* getGlyph(GrGlyph::PackedID, GrFontScaler*); | |
| 40 bool addGlyphToAtlas(GrGlyph*, GrFontScaler*); | |
| 41 | |
| 42 SkISize getAtlasSize() const { return fAtlas.getSize(); } | |
| 43 | |
| 44 // testing | |
| 45 int countGlyphs() const { return fCache.getArray().count(); } | |
| 46 const GrGlyph* glyphAt(int index) const { | |
| 47 return fCache.getArray()[index]; | |
| 48 } | |
| 49 | |
| 50 // remove any references to this plot | |
| 51 void removePlot(const GrPlot* plot); | |
| 52 | |
| 53 public: | |
| 54 // for easy removal from list | |
| 55 GrTextStrike* fPrev; | |
| 56 GrTextStrike* fNext; | |
| 57 | |
| 58 private: | |
| 59 class Key; | |
| 60 GrTHashTable<GrGlyph, Key, 7> fCache; | |
| 61 const GrKey* fFontScalerKey; | |
| 62 GrTAllocPool<GrGlyph> fPool; | |
| 63 | |
| 64 GrFontCache* fFontCache; | |
| 65 GrAtlasMgr* fAtlasMgr; | |
| 66 GrMaskFormat fMaskFormat; | |
| 67 bool fUseDistanceField; | |
| 68 | |
| 69 GrAtlas fAtlas; | |
| 70 | |
| 71 GrGlyph* generateGlyph(GrGlyph::PackedID packed, GrFontScaler* scaler); | |
| 72 | |
| 73 friend class GrFontCache; | |
| 74 }; | |
| 75 | |
| 76 class GrFontCache { | |
| 77 public: | |
| 78 GrFontCache(GrGpu*); | |
| 79 ~GrFontCache(); | |
| 80 | |
| 81 inline GrTextStrike* getStrike(GrFontScaler*, bool useDistanceField); | |
| 82 | |
| 83 void freeAll(); | |
| 84 | |
| 85 // make an unused plot available | |
| 86 bool freeUnusedPlot(GrTextStrike* preserveStrike); | |
| 87 | |
| 88 // testing | |
| 89 int countStrikes() const { return fCache.getArray().count(); } | |
| 90 const GrTextStrike* strikeAt(int index) const { | |
| 91 return fCache.getArray()[index]; | |
| 92 } | |
| 93 GrTextStrike* getHeadStrike() const { return fHead; } | |
| 94 | |
| 95 #ifdef SK_DEBUG | |
| 96 void validate() const; | |
| 97 #else | |
| 98 void validate() const {} | |
| 99 #endif | |
| 100 | |
| 101 #ifdef SK_DEVELOPER | |
| 102 void dump() const; | |
| 103 #endif | |
| 104 | |
| 105 enum AtlasType { | |
| 106 kA8_AtlasType, //!< 1-byte per pixel | |
| 107 k565_AtlasType, //!< 2-bytes per pixel | |
| 108 k8888_AtlasType, //!< 4-bytes per pixel | |
| 109 | |
| 110 kLast_AtlasType = k8888_AtlasType | |
| 111 }; | |
| 112 static const int kAtlasCount = kLast_AtlasType + 1; | |
| 113 | |
| 114 private: | |
| 115 friend class GrFontPurgeListener; | |
| 116 | |
| 117 class Key; | |
| 118 GrTHashTable<GrTextStrike, Key, 8> fCache; | |
| 119 // for LRU | |
| 120 GrTextStrike* fHead; | |
| 121 GrTextStrike* fTail; | |
| 122 | |
| 123 GrGpu* fGpu; | |
| 124 GrAtlasMgr* fAtlasMgr[kAtlasCount]; | |
| 125 | |
| 126 GrTextStrike* generateStrike(GrFontScaler*, const Key&); | |
| 127 inline void detachStrikeFromList(GrTextStrike*); | |
| 128 void purgeStrike(GrTextStrike* strike); | |
| 129 }; | |
| 130 | |
| 131 #endif |
