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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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23 | 23 |
24 // The layer cache listens for these messages to purge picture-related resources
. | 24 // The layer cache listens for these messages to purge picture-related resources
. |
25 struct GrPictureDeletedMessage { | 25 struct GrPictureDeletedMessage { |
26 uint32_t pictureID; | 26 uint32_t pictureID; |
27 }; | 27 }; |
28 | 28 |
29 // GrPictureInfo stores the atlas plots used by a single picture. A single | 29 // GrPictureInfo stores the atlas plots used by a single picture. A single |
30 // plot may be used to store layers from multiple pictures. | 30 // plot may be used to store layers from multiple pictures. |
31 struct GrPictureInfo { | 31 struct GrPictureInfo { |
32 public: | 32 public: |
| 33 static const int kNumPlots = 4; |
| 34 |
33 // for SkTDynamicHash - just use the pictureID as the hash key | 35 // for SkTDynamicHash - just use the pictureID as the hash key |
34 static const uint32_t& GetKey(const GrPictureInfo& pictInfo) { return pictIn
fo.fPictureID; } | 36 static const uint32_t& GetKey(const GrPictureInfo& pictInfo) { return pictIn
fo.fPictureID; } |
35 static uint32_t Hash(const uint32_t& key) { return SkChecksum::Mix(key); } | 37 static uint32_t Hash(const uint32_t& key) { return SkChecksum::Mix(key); } |
36 | 38 |
37 // GrPictureInfo proper | 39 // GrPictureInfo proper |
38 GrPictureInfo(uint32_t pictureID) : fPictureID(pictureID) { } | 40 GrPictureInfo(uint32_t pictureID) : fPictureID(pictureID) { |
| 41 #if !GR_CACHE_HOISTED_LAYERS |
| 42 memset(fPlotUses, 0, sizeof(fPlotUses)); |
| 43 #endif |
| 44 } |
| 45 |
| 46 #if !GR_CACHE_HOISTED_LAYERS |
| 47 void incPlotUsage(int plotID) { |
| 48 SkASSERT(plotID < kNumPlots); |
| 49 fPlotUses[plotID]++; |
| 50 } |
| 51 |
| 52 void decPlotUsage(int plotID) { |
| 53 SkASSERT(plotID < kNumPlots); |
| 54 SkASSERT(fPlotUses[plotID] > 0); |
| 55 fPlotUses[plotID]--; |
| 56 } |
| 57 |
| 58 int plotUsage(int plotID) const { |
| 59 SkASSERT(plotID < kNumPlots); |
| 60 return fPlotUses[plotID]; |
| 61 } |
| 62 #endif |
39 | 63 |
40 const uint32_t fPictureID; | 64 const uint32_t fPictureID; |
| 65 GrAtlas::ClientPlotUsage fPlotUsage; |
41 | 66 |
42 GrAtlas::ClientPlotUsage fPlotUsage; | 67 #if !GR_CACHE_HOISTED_LAYERS |
| 68 private: |
| 69 int fPlotUses[kNumPlots]; |
| 70 #endif |
43 }; | 71 }; |
44 | 72 |
45 // GrCachedLayer encapsulates the caching information for a single saveLayer. | 73 // GrCachedLayer encapsulates the caching information for a single saveLayer. |
46 // | 74 // |
47 // Atlased layers get a ref to the backing GrTexture while non-atlased layers | 75 // Atlased layers get a ref to the backing GrTexture while non-atlased layers |
48 // get a ref to the GrTexture in which they reside. In both cases 'fRect' | 76 // get a ref to the GrTexture in which they reside. In both cases 'fRect' |
49 // contains the layer's extent in its texture. | 77 // contains the layer's extent in its texture. |
50 // Atlased layers also get a pointer to the plot in which they reside. | 78 // Atlased layers also get a pointer to the plot in which they reside. |
51 // For non-atlased layers, the lock field just corresponds to locking in | 79 // For non-atlased layers, the lock field just corresponds to locking in |
52 // the resource cache. For atlased layers, it implements an additional level | 80 // the resource cache. For atlased layers, it implements an additional level |
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312 SkASSERT(fPlotLocks[plotIdx] > 0); | 340 SkASSERT(fPlotLocks[plotIdx] > 0); |
313 --fPlotLocks[plotIdx]; | 341 --fPlotLocks[plotIdx]; |
314 } | 342 } |
315 | 343 |
316 // for testing | 344 // for testing |
317 friend class TestingAccess; | 345 friend class TestingAccess; |
318 int numLayers() const { return fLayerHash.count(); } | 346 int numLayers() const { return fLayerHash.count(); } |
319 }; | 347 }; |
320 | 348 |
321 #endif | 349 #endif |
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