gfx/skia/trunk/src/gpu/GrTextStrike.h@6474c204b198 (annotated)
gfx/skia/trunk/src/gpu/GrTextStrike.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2010 Google Inc. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | |
| michael@0 | 9 | |
| michael@0 | 10 | |
| michael@0 | 11 | #ifndef GrTextStrike_DEFINED |
| michael@0 | 12 | #define GrTextStrike_DEFINED |
| michael@0 | 13 | |
| michael@0 | 14 | #include "GrAllocPool.h" |
| michael@0 | 15 | #include "GrFontScaler.h" |
| michael@0 | 16 | #include "GrTHashTable.h" |
| michael@0 | 17 | #include "GrPoint.h" |
| michael@0 | 18 | #include "GrGlyph.h" |
| michael@0 | 19 | #include "GrDrawTarget.h" |
| michael@0 | 20 | #include "GrAtlas.h" |
| michael@0 | 21 | |
| michael@0 | 22 | class GrFontCache; |
| michael@0 | 23 | class GrGpu; |
| michael@0 | 24 | class GrFontPurgeListener; |
| michael@0 | 25 | |
| michael@0 | 26 | /** |
| michael@0 | 27 | * The textcache maps a hostfontscaler instance to a dictionary of |
| michael@0 | 28 | * glyphid->strike |
| michael@0 | 29 | */ |
| michael@0 | 30 | class GrTextStrike { |
| michael@0 | 31 | public: |
| michael@0 | 32 | GrTextStrike(GrFontCache*, const GrKey* fontScalerKey, GrMaskFormat, GrAtlasMgr*); |
| michael@0 | 33 | ~GrTextStrike(); |
| michael@0 | 34 | |
| michael@0 | 35 | const GrKey* getFontScalerKey() const { return fFontScalerKey; } |
| michael@0 | 36 | GrFontCache* getFontCache() const { return fFontCache; } |
| michael@0 | 37 | GrMaskFormat getMaskFormat() const { return fMaskFormat; } |
| michael@0 | 38 | |
| michael@0 | 39 | inline GrGlyph* getGlyph(GrGlyph::PackedID, GrFontScaler*); |
| michael@0 | 40 | bool addGlyphToAtlas(GrGlyph*, GrFontScaler*); |
| michael@0 | 41 | |
| michael@0 | 42 | SkISize getAtlasSize() const { return fAtlas.getSize(); } |
| michael@0 | 43 | |
| michael@0 | 44 | // testing |
| michael@0 | 45 | int countGlyphs() const { return fCache.getArray().count(); } |
| michael@0 | 46 | const GrGlyph* glyphAt(int index) const { |
| michael@0 | 47 | return fCache.getArray()[index]; |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | // remove any references to this plot |
| michael@0 | 51 | void removePlot(const GrPlot* plot); |
| michael@0 | 52 | |
| michael@0 | 53 | public: |
| michael@0 | 54 | // for easy removal from list |
| michael@0 | 55 | GrTextStrike* fPrev; |
| michael@0 | 56 | GrTextStrike* fNext; |
| michael@0 | 57 | |
| michael@0 | 58 | private: |
| michael@0 | 59 | class Key; |
| michael@0 | 60 | GrTHashTable<GrGlyph, Key, 7> fCache; |
| michael@0 | 61 | const GrKey* fFontScalerKey; |
| michael@0 | 62 | GrTAllocPool<GrGlyph> fPool; |
| michael@0 | 63 | |
| michael@0 | 64 | GrFontCache* fFontCache; |
| michael@0 | 65 | GrAtlasMgr* fAtlasMgr; |
| michael@0 | 66 | GrMaskFormat fMaskFormat; |
| michael@0 | 67 | bool fUseDistanceField; |
| michael@0 | 68 | |
| michael@0 | 69 | GrAtlas fAtlas; |
| michael@0 | 70 | |
| michael@0 | 71 | GrGlyph* generateGlyph(GrGlyph::PackedID packed, GrFontScaler* scaler); |
| michael@0 | 72 | |
| michael@0 | 73 | friend class GrFontCache; |
| michael@0 | 74 | }; |
| michael@0 | 75 | |
| michael@0 | 76 | class GrFontCache { |
| michael@0 | 77 | public: |
| michael@0 | 78 | GrFontCache(GrGpu*); |
| michael@0 | 79 | ~GrFontCache(); |
| michael@0 | 80 | |
| michael@0 | 81 | inline GrTextStrike* getStrike(GrFontScaler*, bool useDistanceField); |
| michael@0 | 82 | |
| michael@0 | 83 | void freeAll(); |
| michael@0 | 84 | |
| michael@0 | 85 | // make an unused plot available |
| michael@0 | 86 | bool freeUnusedPlot(GrTextStrike* preserveStrike); |
| michael@0 | 87 | |
| michael@0 | 88 | // testing |
| michael@0 | 89 | int countStrikes() const { return fCache.getArray().count(); } |
| michael@0 | 90 | const GrTextStrike* strikeAt(int index) const { |
| michael@0 | 91 | return fCache.getArray()[index]; |
| michael@0 | 92 | } |
| michael@0 | 93 | GrTextStrike* getHeadStrike() const { return fHead; } |
| michael@0 | 94 | |
| michael@0 | 95 | #ifdef SK_DEBUG |
| michael@0 | 96 | void validate() const; |
| michael@0 | 97 | #else |
| michael@0 | 98 | void validate() const {} |
| michael@0 | 99 | #endif |
| michael@0 | 100 | |
| michael@0 | 101 | #ifdef SK_DEVELOPER |
| michael@0 | 102 | void dump() const; |
| michael@0 | 103 | #endif |
| michael@0 | 104 | |
| michael@0 | 105 | enum AtlasType { |
| michael@0 | 106 | kA8_AtlasType, //!< 1-byte per pixel |
| michael@0 | 107 | k565_AtlasType, //!< 2-bytes per pixel |
| michael@0 | 108 | k8888_AtlasType, //!< 4-bytes per pixel |
| michael@0 | 109 | |
| michael@0 | 110 | kLast_AtlasType = k8888_AtlasType |
| michael@0 | 111 | }; |
| michael@0 | 112 | static const int kAtlasCount = kLast_AtlasType + 1; |
| michael@0 | 113 | |
| michael@0 | 114 | private: |
| michael@0 | 115 | friend class GrFontPurgeListener; |
| michael@0 | 116 | |
| michael@0 | 117 | class Key; |
| michael@0 | 118 | GrTHashTable<GrTextStrike, Key, 8> fCache; |
| michael@0 | 119 | // for LRU |
| michael@0 | 120 | GrTextStrike* fHead; |
| michael@0 | 121 | GrTextStrike* fTail; |
| michael@0 | 122 | |
| michael@0 | 123 | GrGpu* fGpu; |
| michael@0 | 124 | GrAtlasMgr* fAtlasMgr[kAtlasCount]; |
| michael@0 | 125 | |
| michael@0 | 126 | GrTextStrike* generateStrike(GrFontScaler*, const Key&); |
| michael@0 | 127 | inline void detachStrikeFromList(GrTextStrike*); |
| michael@0 | 128 | void purgeStrike(GrTextStrike* strike); |
| michael@0 | 129 | }; |
| michael@0 | 130 | |
| michael@0 | 131 | #endif |
