1 /* 2 Copyright 2010 Google Inc. 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 SkBitmapCache_DEFINED 18 #define SkBitmapCache_DEFINED 19 20 #include "SkBitmap.h" 21 22 class SkBitmapCache : SkNoncopyable { 23 public: 24 SkBitmapCache(int maxEntries); 25 ~SkBitmapCache(); 26 27 bool find(const void* buffer, size_t len, SkBitmap*) const; 28 void add(const void* buffer, size_t len, const SkBitmap&); 29 30 private: 31 int fEntryCount; 32 const int fMaxEntries; 33 34 struct Entry; 35 mutable Entry* fHead; 36 mutable Entry* fTail; 37 38 inline Entry* detach(Entry*) const; 39 inline void attachToHead(Entry*) const; 40 41 #ifdef SK_DEBUG 42 void validate() const; 43 #else validate()44 void validate() const {} 45 #endif 46 47 class AutoValidate : SkNoncopyable { 48 public: AutoValidate(const SkBitmapCache * bc)49 AutoValidate(const SkBitmapCache* bc) : fBC(bc) { bc->validate(); } ~AutoValidate()50 ~AutoValidate() { fBC->validate(); } 51 private: 52 const SkBitmapCache* fBC; 53 }; 54 }; 55 56 #endif 57 58