OLD | NEW |
(Empty) | |
| 1 /* |
| 2 * Copyright 2014 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #ifndef GrLayerCache_DEFINED |
| 9 #define GrLayerCache_DEFINED |
| 10 |
| 11 #include "GrAllocPool.h" |
| 12 #include "GrTHashTable.h" |
| 13 #include "GrPictureUtils.h" |
| 14 #include "GrRect.h" |
| 15 |
| 16 class GrAtlasMgr; |
| 17 class GrGpu; |
| 18 class GrPlot; |
| 19 class SkPicture; |
| 20 |
| 21 // GrAtlasLocation captures an atlased item's position in the atlas. This |
| 22 // means the plot in which it resides and its bounds inside the plot. |
| 23 // TODO: Make GrGlyph use one of these? |
| 24 class GrAtlasLocation { |
| 25 public: |
| 26 GrAtlasLocation() : fPlot(NULL) {} |
| 27 |
| 28 void set(GrPlot* plot, const GrIRect16& bounds) { |
| 29 fPlot = plot; |
| 30 fBounds = bounds; |
| 31 } |
| 32 |
| 33 const GrPlot* plot() const { |
| 34 return fPlot; |
| 35 } |
| 36 |
| 37 const GrIRect16& bounds() const { |
| 38 return fBounds; |
| 39 } |
| 40 |
| 41 private: |
| 42 GrPlot* fPlot; |
| 43 GrIRect16 fBounds; // only valid is fPlot != NULL |
| 44 }; |
| 45 |
| 46 // A GrAtlasedLayer encapsulates the atlasing information for a single saveLayer
. |
| 47 // It is roughly equivalent to a GrGlyph in the font caching system |
| 48 class GrAtlasedLayer { |
| 49 public: |
| 50 GrAtlasedLayer() : fPictureID(SkPicture::kInvalidGenID) { } |
| 51 |
| 52 uint32_t pictureID() const { return fPictureID; } |
| 53 int layerID() const { return fLayerID; } |
| 54 |
| 55 void init(uint32_t pictureID, int layerID) { |
| 56 fPictureID = pictureID; |
| 57 fLayerID = layerID; |
| 58 } |
| 59 |
| 60 private: |
| 61 uint32_t fPictureID; |
| 62 int fLayerID; // only valid if fPicture != kInvalidGenID |
| 63 GrAtlasLocation fLocation; |
| 64 }; |
| 65 |
| 66 // The GrLayerCache caches pre-computed saveLayers for later rendering. |
| 67 // Unlike the GrFontCache, this cache only has one GrAtlasMgr (for 8888) |
| 68 // and one GrPlot (for the entire atlas). As such, the GrLayerCache |
| 69 // roughly combines the functionality of the GrFontCache and GrTextStrike |
| 70 // classes. |
| 71 class GrLayerCache { |
| 72 public: |
| 73 GrLayerCache(GrGpu*); |
| 74 ~GrLayerCache(); |
| 75 |
| 76 void freeAll(); |
| 77 |
| 78 const GrAtlasedLayer* findLayerOrCreate(SkPicture* picture, int id); |
| 79 |
| 80 private: |
| 81 SkAutoTUnref<GrGpu> fGpu; |
| 82 SkAutoTDelete<GrAtlasMgr> fAtlasMgr; // TODO: could lazily allocate |
| 83 |
| 84 class PictureLayerKey; |
| 85 GrTHashTable<GrAtlasedLayer, PictureLayerKey, 7> fLayerHash; |
| 86 GrTAllocPool<GrAtlasedLayer> fLayerPool; |
| 87 |
| 88 void init(); |
| 89 GrAtlasedLayer* createLayer(SkPicture* picture, int id); |
| 90 |
| 91 }; |
| 92 |
| 93 #endif |
OLD | NEW |