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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 |
11 #define USE_ATLAS 0 | 11 #define USE_ATLAS 0 |
12 | 12 |
13 #include "GrAllocPool.h" | 13 #include "GrAllocPool.h" |
14 #include "GrAtlas.h" | 14 #include "GrAtlas.h" |
15 #include "GrTHashTable.h" | 15 #include "GrTHashTable.h" |
16 #include "GrPictureUtils.h" | 16 #include "GrPictureUtils.h" |
17 #include "GrRect.h" | 17 #include "GrRect.h" |
18 | 18 |
19 class GrGpu; | 19 class GrGpu; |
20 class SkPicture; | 20 class SkPicture; |
21 | 21 |
22 // GrCachedLayer encapsulates the caching information for a single saveLayer. | 22 // GrCachedLayer encapsulates the caching information for a single saveLayer. |
23 // | 23 // |
24 // Atlased layers get a ref to their atlas GrTexture and 'fRect' contains | 24 // Atlased layers get a ref to the backing GrTexture while non-atlased layers |
25 // their absolute location in the backing texture. | 25 // get a ref to the GrTexture in which they reside. In both cases 'fRect' |
26 // | 26 // contains the layer's extent in its texture. |
27 // Non-atlased layers get a ref to the GrTexture in which they reside. Their | |
28 // 'fRect' will be empty. | |
29 // | 27 // |
30 // TODO: can we easily reuse the empty space in the non-atlased GrTexture's? | 28 // TODO: can we easily reuse the empty space in the non-atlased GrTexture's? |
31 struct GrCachedLayer { | 29 struct GrCachedLayer { |
32 public: | 30 public: |
33 GrCachedLayer(uint32_t pictureID, int layerID) { | 31 GrCachedLayer(uint32_t pictureID, int layerID) |
| 32 : fAtlased(false) { |
34 fPictureID = pictureID; | 33 fPictureID = pictureID; |
35 fLayerID = layerID; | 34 fLayerID = layerID; |
36 fTexture = NULL; | 35 fTexture = NULL; |
37 fRect = GrIRect16::MakeEmpty(); | 36 fRect = GrIRect16::MakeEmpty(); |
38 } | 37 } |
39 | 38 |
40 uint32_t pictureID() const { return fPictureID; } | 39 uint32_t pictureID() const { return fPictureID; } |
41 int layerID() const { return fLayerID; } | 40 int layerID() const { return fLayerID; } |
42 | 41 |
43 // This call takes over the caller's ref | 42 // This call takes over the caller's ref |
44 void setTexture(GrTexture* texture, const GrIRect16& rect) { | 43 void setTexture(GrTexture* texture, const GrIRect16& rect) { |
45 if (NULL != fTexture) { | 44 if (NULL != fTexture) { |
46 fTexture->unref(); | 45 fTexture->unref(); |
47 } | 46 } |
48 | 47 |
49 fTexture = texture; // just take over caller's ref | 48 fTexture = texture; // just take over caller's ref |
50 fRect = rect; | 49 fRect = rect; |
51 } | 50 } |
52 GrTexture* texture() { return fTexture; } | 51 GrTexture* texture() { return fTexture; } |
53 const GrIRect16& rect() const { return fRect; } | 52 const GrIRect16& rect() const { return fRect; } |
54 | 53 |
| 54 void setAtlased(bool atlased) { fAtlased = atlased; } |
| 55 bool isAtlased() const { return fAtlased; } |
| 56 |
| 57 SkDEBUGCODE(void validate(GrTexture* backingTexture) const;) |
| 58 |
55 private: | 59 private: |
| 60 // ID of the picture of which this layer is a part |
56 uint32_t fPictureID; | 61 uint32_t fPictureID; |
| 62 |
57 // fLayerID is only valid when fPicture != kInvalidGenID in which case it | 63 // fLayerID is only valid when fPicture != kInvalidGenID in which case it |
58 // is the index of this layer in the picture (one of 0 .. #layers). | 64 // is the index of this layer in the picture (one of 0 .. #layers). |
59 int fLayerID; | 65 int fLayerID; |
60 | 66 |
61 // fTexture is a ref on the atlasing texture for atlased layers and a | 67 // fTexture is a ref on the atlasing texture for atlased layers and a |
62 // ref on a GrTexture for non-atlased textures. In both cases, if this is | 68 // ref on a GrTexture for non-atlased textures. In both cases, if this is |
63 // non-NULL, that means that the texture is locked in the texture cache. | 69 // non-NULL, that means that the texture is locked in the texture cache. |
64 GrTexture* fTexture; | 70 GrTexture* fTexture; |
65 | 71 |
66 // For non-atlased layers 'fRect' is empty otherwise it is the bound of | 72 // True if this layer is in an atlas; false otherwise. |
67 // the layer in the atlas. | 73 bool fAtlased; |
| 74 |
| 75 // For both atlased and non-atlased layers 'fRect' contains the bound of |
| 76 // the layer in whichever texture it resides. It is empty when 'fTexture' |
| 77 // is NULL. |
68 GrIRect16 fRect; | 78 GrIRect16 fRect; |
69 }; | 79 }; |
70 | 80 |
71 // The GrLayerCache caches pre-computed saveLayers for later rendering. | 81 // The GrLayerCache caches pre-computed saveLayers for later rendering. |
72 // Non-atlased layers are stored in their own GrTexture while the atlased | 82 // Non-atlased layers are stored in their own GrTexture while the atlased |
73 // layers share a single GrTexture. | 83 // layers share a single GrTexture. |
74 // Unlike the GrFontCache, the GrTexture atlas only has one GrAtlas (for 8888) | 84 // Unlike the GrFontCache, the GrTexture atlas only has one GrAtlas (for 8888) |
75 // and one GrPlot (for the entire atlas). As such, the GrLayerCache | 85 // and one GrPlot (for the entire atlas). As such, the GrLayerCache |
76 // roughly combines the functionality of the GrFontCache and GrTextStrike | 86 // roughly combines the functionality of the GrFontCache and GrTextStrike |
77 // classes. | 87 // classes. |
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92 // If false is returned the caller should (re)render the layer into the | 102 // If false is returned the caller should (re)render the layer into the |
93 // newly acquired texture. | 103 // newly acquired texture. |
94 bool lock(GrCachedLayer* layer, const GrTextureDesc& desc); | 104 bool lock(GrCachedLayer* layer, const GrTextureDesc& desc); |
95 | 105 |
96 // Inform the cache that layer's cached image is not currently required | 106 // Inform the cache that layer's cached image is not currently required |
97 void unlock(GrCachedLayer* layer); | 107 void unlock(GrCachedLayer* layer); |
98 | 108 |
99 // Remove all the layers (and unlock any resources) associated with 'picture
' | 109 // Remove all the layers (and unlock any resources) associated with 'picture
' |
100 void purge(const SkPicture* picture); | 110 void purge(const SkPicture* picture); |
101 | 111 |
| 112 SkDEBUGCODE(void validate() const;) |
| 113 |
102 private: | 114 private: |
103 GrContext* fContext; // pointer back to owning context | 115 GrContext* fContext; // pointer back to owning context |
104 SkAutoTDelete<GrAtlas> fAtlas; // TODO: could lazily allocate | 116 SkAutoTDelete<GrAtlas> fAtlas; // TODO: could lazily allocate |
105 GrAtlas::ClientPlotUsage fPlotUsage; | 117 GrAtlas::ClientPlotUsage fPlotUsage; |
106 | 118 |
107 class PictureLayerKey; | 119 class PictureLayerKey; |
108 GrTHashTable<GrCachedLayer, PictureLayerKey, 7> fLayerHash; | 120 GrTHashTable<GrCachedLayer, PictureLayerKey, 7> fLayerHash; |
109 | 121 |
110 void initAtlas(); | 122 void initAtlas(); |
111 GrCachedLayer* createLayer(const SkPicture* picture, int layerID); | 123 GrCachedLayer* createLayer(const SkPicture* picture, int layerID); |
112 | 124 |
113 // for testing | 125 // for testing |
114 friend class GetNumLayers; | 126 friend class GetNumLayers; |
115 int numLayers() const { return fLayerHash.count(); } | 127 int numLayers() const { return fLayerHash.count(); } |
116 }; | 128 }; |
117 | 129 |
118 #endif | 130 #endif |
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