1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_HWUI_PATH_CACHE_H 18 #define ANDROID_HWUI_PATH_CACHE_H 19 20 #include <utils/Vector.h> 21 22 #include "Debug.h" 23 #include "ShapeCache.h" 24 25 #include "utils/Compare.h" 26 27 namespace android { 28 namespace uirenderer { 29 30 /////////////////////////////////////////////////////////////////////////////// 31 // Classes 32 /////////////////////////////////////////////////////////////////////////////// 33 34 struct PathCacheEntry: public ShapeCacheEntry { PathCacheEntryPathCacheEntry35 PathCacheEntry(SkPath* path, SkPaint* paint): 36 ShapeCacheEntry(ShapeCacheEntry::kShapePath, paint) { 37 this->path = path; 38 } 39 PathCacheEntryPathCacheEntry40 PathCacheEntry(): ShapeCacheEntry() { 41 path = NULL; 42 } 43 lessThanPathCacheEntry44 bool lessThan(const ShapeCacheEntry& r) const { 45 const PathCacheEntry& rhs = (const PathCacheEntry&) r; 46 LTE_INT(path) { 47 return false; 48 } 49 return false; 50 } 51 52 SkPath* path; 53 54 }; // PathCacheEntry 55 56 /** 57 * A simple LRU path cache. The cache has a maximum size expressed in bytes. 58 * Any texture added to the cache causing the cache to grow beyond the maximum 59 * allowed size will also cause the oldest texture to be kicked out. 60 */ 61 class PathCache: public ShapeCache<PathCacheEntry> { 62 public: 63 PathCache(); 64 65 /** 66 * Returns the texture associated with the specified path. If the texture 67 * cannot be found in the cache, a new texture is generated. 68 */ 69 PathTexture* get(SkPath* path, SkPaint* paint); 70 /** 71 * Removes an entry. 72 */ 73 void remove(SkPath* path); 74 /** 75 * Removes the specified path. This is meant to be called from threads 76 * that are not the EGL context thread. 77 */ 78 void removeDeferred(SkPath* path); 79 /** 80 * Process deferred removals. 81 */ 82 void clearGarbage(); 83 84 private: 85 Vector<SkPath*> mGarbage; 86 mutable Mutex mLock; 87 }; // class PathCache 88 89 }; // namespace uirenderer 90 }; // namespace android 91 92 #endif // ANDROID_HWUI_PATH_CACHE_H 93