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 #include "GrAtlas.h" 9 #include "GrGpu.h" 10 #include "GrLayerCache.h" 11 12 /** 13 * PictureLayerKey just wraps a saveLayer's id in the picture for GrTHashTable. 14 */ 15 class GrLayerCache::PictureLayerKey { 16 public: 17 PictureLayerKey(uint32_t pictureID, int layerID) 18 : fPictureID(pictureID) 19 , fLayerID(layerID) { 20 } 21 22 uint32_t pictureID() const { return fPictureID; } 23 int layerID() const { return fLayerID; } 24 25 uint32_t getHash() const { return (fPictureID << 16) | fLayerID; } 26 27 static bool LessThan(const GrCachedLayer& layer, const PictureLayerKey& key) { 28 if (layer.pictureID() == key.pictureID()) { 29 return layer.layerID() < key.layerID(); 30 } 31 32 return layer.pictureID() < key.pictureID(); 33 } 34 35 static bool Equals(const GrCachedLayer& layer, const PictureLayerKey& key) { 36 return layer.pictureID() == key.pictureID() && layer.layerID() == key.layerID(); 37 } 38 39 private: 40 uint32_t fPictureID; 41 int fLayerID; 42 }; 43 44 GrLayerCache::GrLayerCache(GrGpu* gpu) 45 : fGpu(SkRef(gpu)) 46 , fLayerPool(16) { // TODO: may need to increase this later 47 } 48 49 GrLayerCache::~GrLayerCache() { 50 } 51 52 void GrLayerCache::init() { 53 static const int kAtlasTextureWidth = 1024; 54 static const int kAtlasTextureHeight = 1024; 55 56 SkASSERT(NULL == fAtlasMgr.get()); 57 58 // The layer cache only gets 1 plot 59 SkISize textureSize = SkISize::Make(kAtlasTextureWidth, kAtlasTextureHeight); 60 fAtlasMgr.reset(SkNEW_ARGS(GrAtlasMgr, (fGpu, kSkia8888_GrPixelConfig, 61 textureSize, 1, 1, false))); 62 } 63 64 void GrLayerCache::freeAll() { 65 fLayerHash.deleteAll(); 66 fAtlasMgr.free(); 67 } 68 69 GrCachedLayer* GrLayerCache::createLayer(const SkPicture* picture, int layerID) { 70 GrCachedLayer* layer = fLayerPool.alloc(); 71 72 SkASSERT(picture->uniqueID() != SK_InvalidGenID); 73 layer->init(picture->uniqueID(), layerID); 74 fLayerHash.insert(PictureLayerKey(picture->uniqueID(), layerID), layer); 75 return layer; 76 } 77 78 79 GrCachedLayer* GrLayerCache::findLayerOrCreate(const SkPicture* picture, int layerID) { 80 SkASSERT(picture->uniqueID() != SK_InvalidGenID); 81 GrCachedLayer* layer = fLayerHash.find(PictureLayerKey(picture->uniqueID(), layerID)); 82 if (NULL == layer) { 83 layer = this->createLayer(picture, layerID); 84 } 85 return layer; 86 } 87
