_string_hash.rar_The Just

/* * Copyright 2014 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "GrAtlas.h" #include "GrGpu.h" #include "GrLayerCache.h" /** * PictureLayerKey just wraps a saveLayer's id in the picture for GrTHashTable. */ class GrLayerCache::PictureLayerKey { public: PictureLayerKey(uint32_t pictureID, int layerID) : fPictureID(pictureID) , fLayerID(layerID) { } uint32_t pictureID() const { return fPictureID; } int layerID() const { return fLayerID; } uint32_t getHash() const { return (fPictureID << 16) | fLayerID; } static bool LessThan(const GrCachedLayer& layer, const PictureLayerKey& key) { if (layer.pictureID() == key.pictureID()) { return layer.layerID() < key.layerID(); } return layer.pictureID() < key.pictureID(); } static bool Equals(const GrCachedLayer& layer, const PictureLayerKey& key) { return layer.pictureID() == key.pictureID() && layer.layerID() == key.layerID(); } private: uint32_t fPictureID; int fLayerID; }; GrLayerCache::GrLayerCache(GrGpu* gpu) : fGpu(SkRef(gpu)) , fLayerPool(16) { // TODO: may need to increase this later } GrLayerCache::~GrLayerCache() { } void GrLayerCache::init() { static const int kAtlasTextureWidth = 1024; static const int kAtlasTextureHeight = 1024; SkASSERT(NULL == fAtlasMgr.get()); // The layer cache only gets 1 plot SkISize textureSize = SkISize::Make(kAtlasTextureWidth, kAtlasTextureHeight); fAtlasMgr.reset(SkNEW_ARGS(GrAtlasMgr, (fGpu, kSkia8888_GrPixelConfig, textureSize, 1, 1, false))); } void GrLayerCache::freeAll() { fLayerHash.deleteAll(); fAtlasMgr.free(); } GrCachedLayer* GrLayerCache::createLayer(const SkPicture* picture, int layerID) { GrCachedLayer* layer = fLayerPool.alloc(); SkASSERT(picture->uniqueID() != SK_InvalidGenID); layer->init(picture->uniqueID(), layerID); fLayerHash.insert(PictureLayerKey(picture->uniqueID(), layerID), layer); return layer; } GrCachedLayer* GrLayerCache::findLayerOrCreate(const SkPicture* picture, int layerID) { SkASSERT(picture->uniqueID() != SK_InvalidGenID); GrCachedLayer* layer = fLayerHash.find(PictureLayerKey(picture->uniqueID(), layerID)); if (NULL == layer) { layer = this->createLayer(picture, layerID); } return layer; }