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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrLayerCache_DEFINED | 8 #ifndef GrLayerCache_DEFINED |
9 #define GrLayerCache_DEFINED | 9 #define GrLayerCache_DEFINED |
10 | 10 |
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83 // ref on a GrTexture for non-atlased textures. In both cases, if this is | 83 // ref on a GrTexture for non-atlased textures. In both cases, if this is |
84 // non-NULL, that means that the texture is locked in the texture cache. | 84 // non-NULL, that means that the texture is locked in the texture cache. |
85 GrTexture* fTexture; | 85 GrTexture* fTexture; |
86 | 86 |
87 GrAtlasLocation fLocation; // only valid if the layer is atlased | 87 GrAtlasLocation fLocation; // only valid if the layer is atlased |
88 }; | 88 }; |
89 | 89 |
90 // The GrLayerCache caches pre-computed saveLayers for later rendering. | 90 // The GrLayerCache caches pre-computed saveLayers for later rendering. |
91 // Non-atlased layers are stored in their own GrTexture while the atlased | 91 // Non-atlased layers are stored in their own GrTexture while the atlased |
92 // layers share a single GrTexture. | 92 // layers share a single GrTexture. |
93 // Unlike the GrFontCache, the GrTexture atlas only has one GrAtlasMgr (for 8888
) | 93 // Unlike the GrFontCache, the GrTexture atlas only has one GrAtlas (for 8888) |
94 // and one GrPlot (for the entire atlas). As such, the GrLayerCache | 94 // and one GrPlot (for the entire atlas). As such, the GrLayerCache |
95 // roughly combines the functionality of the GrFontCache and GrTextStrike | 95 // roughly combines the functionality of the GrFontCache and GrTextStrike |
96 // classes. | 96 // classes. |
97 class GrLayerCache { | 97 class GrLayerCache { |
98 public: | 98 public: |
99 GrLayerCache(GrContext*); | 99 GrLayerCache(GrContext*); |
100 ~GrLayerCache(); | 100 ~GrLayerCache(); |
101 | 101 |
102 // As a cache, the GrLayerCache can be ordered to free up all its cached | 102 // As a cache, the GrLayerCache can be ordered to free up all its cached |
103 // elements by the GrContext | 103 // elements by the GrContext |
104 void freeAll(); | 104 void freeAll(); |
105 | 105 |
106 GrCachedLayer* findLayer(const SkPicture* picture, int layerID); | 106 GrCachedLayer* findLayer(const SkPicture* picture, int layerID); |
107 GrCachedLayer* findLayerOrCreate(const SkPicture* picture, int layerID); | 107 GrCachedLayer* findLayerOrCreate(const SkPicture* picture, int layerID); |
108 | 108 |
109 // Inform the cache that layer's cached image is now required. Return true | 109 // Inform the cache that layer's cached image is now required. Return true |
110 // if it was found in the ResourceCache and doesn't need to be regenerated. | 110 // if it was found in the ResourceCache and doesn't need to be regenerated. |
111 // If false is returned the caller should (re)render the layer into the | 111 // If false is returned the caller should (re)render the layer into the |
112 // newly acquired texture. | 112 // newly acquired texture. |
113 bool lock(GrCachedLayer* layer, const GrTextureDesc& desc); | 113 bool lock(GrCachedLayer* layer, const GrTextureDesc& desc); |
114 | 114 |
115 // Inform the cache that layer's cached image is not currently required | 115 // Inform the cache that layer's cached image is not currently required |
116 void unlock(GrCachedLayer* layer); | 116 void unlock(GrCachedLayer* layer); |
117 | 117 |
118 private: | 118 private: |
119 GrContext* fContext; // pointer back to owning context | 119 GrContext* fContext; // pointer back to owning context |
120 SkAutoTDelete<GrAtlasMgr> fAtlasMgr; // TODO: could lazily allocate | 120 SkAutoTDelete<GrAtlas> fAtlas; // TODO: could lazily allocate |
121 GrAtlas fPlotUsage; | 121 GrAtlas::ClientPlotUsage fPlotUsage; |
122 | 122 |
123 class PictureLayerKey; | 123 class PictureLayerKey; |
124 GrTHashTable<GrCachedLayer, PictureLayerKey, 7> fLayerHash; | 124 GrTHashTable<GrCachedLayer, PictureLayerKey, 7> fLayerHash; |
125 GrTAllocPool<GrCachedLayer> fLayerPool; | 125 GrTAllocPool<GrCachedLayer> fLayerPool; |
126 | 126 |
127 void init(); | 127 void init(); |
128 GrCachedLayer* createLayer(const SkPicture* picture, int layerID); | 128 GrCachedLayer* createLayer(const SkPicture* picture, int layerID); |
129 }; | 129 }; |
130 | 130 |
131 #endif | 131 #endif |
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