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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2010 Google Inc. | 3 * Copyright 2010 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 | 10 |
11 #ifndef GrTextStrike_DEFINED | 11 #ifndef GrTextStrike_DEFINED |
12 #define GrTextStrike_DEFINED | 12 #define GrTextStrike_DEFINED |
13 | 13 |
14 #include "GrAllocPool.h" | 14 #include "GrAllocPool.h" |
15 #include "GrFontScaler.h" | 15 #include "GrFontScaler.h" |
16 #include "SkTDynamicHash.h" | 16 #include "SkTDynamicHash.h" |
17 #include "GrGlyph.h" | 17 #include "GrGlyph.h" |
18 #include "GrDrawTarget.h" | 18 #include "GrDrawTarget.h" |
19 #include "GrAtlas.h" | 19 #include "GrAtlas.h" |
20 | 20 |
21 class GrFontCache; | 21 class GrFontCache; |
22 class GrGpu; | 22 class GrGpu; |
23 class GrFontPurgeListener; | 23 class GrFontPurgeListener; |
24 | 24 |
25 /** | 25 /** |
26 * The textcache maps a hostfontscaler instance to a dictionary of | 26 * The textstrike maps a hostfontscaler instance to a dictionary of |
27 * glyphid->strike | 27 * glyphid->strike |
28 */ | 28 */ |
29 class GrTextStrike { | 29 class GrTextStrike { |
30 public: | 30 public: |
31 GrTextStrike(GrFontCache*, const GrFontDescKey* fontScalerKey, GrMaskFormat,
GrAtlas*); | 31 GrTextStrike(GrFontCache*, const GrFontDescKey* fontScalerKey); |
32 ~GrTextStrike(); | 32 ~GrTextStrike(); |
33 | 33 |
34 const GrFontDescKey* getFontScalerKey() const { return fFontScalerKey; } | 34 const GrFontDescKey* getFontScalerKey() const { return fFontScalerKey; } |
35 GrFontCache* getFontCache() const { return fFontCache; } | 35 GrFontCache* getFontCache() const { return fFontCache; } |
36 GrMaskFormat getMaskFormat() const { return fMaskFormat; } | |
37 GrTexture* getTexture() const { return fAtlas->getTexture(); } | |
38 | 36 |
39 inline GrGlyph* getGlyph(GrGlyph::PackedID, GrFontScaler*); | 37 inline GrGlyph* getGlyph(GrGlyph::PackedID, GrFontScaler*); |
40 // returns true if glyph (or glyph+padding for distance field) | 38 // returns true if glyph (or glyph+padding for distance field) |
41 // is too large to ever fit in texture atlas subregions (GrPlots) | 39 // is too large to ever fit in texture atlas subregions (GrPlots) |
42 bool glyphTooLargeForAtlas(GrGlyph*); | 40 bool glyphTooLargeForAtlas(GrGlyph*); |
43 // returns true if glyph successfully added to texture atlas, false otherwis
e | 41 // returns true if glyph successfully added to texture atlas, false otherwis
e |
44 bool addGlyphToAtlas(GrGlyph*, GrFontScaler*); | 42 bool addGlyphToAtlas(GrGlyph*, GrFontScaler*); |
45 | 43 |
46 // testing | 44 // testing |
47 int countGlyphs() const { return fCache.count(); } | 45 int countGlyphs() const { return fCache.count(); } |
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60 // for easy removal from list | 58 // for easy removal from list |
61 GrTextStrike* fPrev; | 59 GrTextStrike* fPrev; |
62 GrTextStrike* fNext; | 60 GrTextStrike* fNext; |
63 | 61 |
64 private: | 62 private: |
65 SkTDynamicHash<GrGlyph, GrGlyph::PackedID> fCache; | 63 SkTDynamicHash<GrGlyph, GrGlyph::PackedID> fCache; |
66 const GrFontDescKey* fFontScalerKey; | 64 const GrFontDescKey* fFontScalerKey; |
67 GrTAllocPool<GrGlyph> fPool; | 65 GrTAllocPool<GrGlyph> fPool; |
68 | 66 |
69 GrFontCache* fFontCache; | 67 GrFontCache* fFontCache; |
70 GrAtlas* fAtlas; | |
71 GrMaskFormat fMaskFormat; | |
72 bool fUseDistanceField; | 68 bool fUseDistanceField; |
73 | 69 |
74 GrAtlas::ClientPlotUsage fPlotUsage; | 70 GrAtlas::ClientPlotUsage fPlotUsage; |
75 | 71 |
76 GrGlyph* generateGlyph(GrGlyph::PackedID packed, GrFontScaler* scaler); | 72 GrGlyph* generateGlyph(GrGlyph::PackedID packed, GrFontScaler* scaler); |
77 | 73 |
78 friend class GrFontCache; | 74 friend class GrFontCache; |
79 }; | 75 }; |
80 | 76 |
81 class GrFontCache { | 77 class GrFontCache { |
82 public: | 78 public: |
83 GrFontCache(GrGpu*); | 79 GrFontCache(GrGpu*); |
84 ~GrFontCache(); | 80 ~GrFontCache(); |
85 | 81 |
86 inline GrTextStrike* getStrike(GrFontScaler*, bool useDistanceField); | 82 inline GrTextStrike* getStrike(GrFontScaler*, bool useDistanceField); |
87 | 83 |
| 84 // add to texture atlas that matches this format |
| 85 GrPlot* addToAtlas(GrMaskFormat format, GrAtlas::ClientPlotUsage* usage, |
| 86 int width, int height, const void* image, |
| 87 SkIPoint16* loc); |
| 88 |
88 void freeAll(); | 89 void freeAll(); |
89 | 90 |
90 // make an unused plot available | 91 // make an unused plot available for this glyph |
91 bool freeUnusedPlot(GrTextStrike* preserveStrike); | 92 bool freeUnusedPlot(GrTextStrike* preserveStrike, const GrGlyph* glyph); |
92 | 93 |
93 // testing | 94 // testing |
94 int countStrikes() const { return fCache.count(); } | 95 int countStrikes() const { return fCache.count(); } |
95 GrTextStrike* getHeadStrike() const { return fHead; } | 96 GrTextStrike* getHeadStrike() const { return fHead; } |
96 | 97 |
97 void updateTextures() { | 98 void updateTextures() { |
98 for (int i = 0; i < kAtlasCount; ++i) { | 99 for (int i = 0; i < kAtlasCount; ++i) { |
99 if (fAtlases[i]) { | 100 if (fAtlases[i]) { |
100 fAtlases[i]->uploadPlotsToTexture(); | 101 fAtlases[i]->uploadPlotsToTexture(); |
101 } | 102 } |
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129 | 130 |
130 GrGpu* fGpu; | 131 GrGpu* fGpu; |
131 GrAtlas* fAtlases[kAtlasCount]; | 132 GrAtlas* fAtlases[kAtlasCount]; |
132 | 133 |
133 GrTextStrike* generateStrike(GrFontScaler*); | 134 GrTextStrike* generateStrike(GrFontScaler*); |
134 inline void detachStrikeFromList(GrTextStrike*); | 135 inline void detachStrikeFromList(GrTextStrike*); |
135 void purgeStrike(GrTextStrike* strike); | 136 void purgeStrike(GrTextStrike* strike); |
136 }; | 137 }; |
137 | 138 |
138 #endif | 139 #endif |
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