michael@0: 
michael@0: /*
michael@0:  * Copyright 2010 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef SkBitmapCache_DEFINED
michael@0: #define SkBitmapCache_DEFINED
michael@0: 
michael@0: #include "SkBitmap.h"
michael@0: 
michael@0: class SkBitmapCache : SkNoncopyable {
michael@0: public:
michael@0:     SkBitmapCache(int maxEntries);
michael@0:     ~SkBitmapCache();
michael@0: 
michael@0:     bool find(const void* buffer, size_t len, SkBitmap*) const;
michael@0:     void add(const void* buffer, size_t len, const SkBitmap&);
michael@0: 
michael@0: private:
michael@0:     int fEntryCount;
michael@0:     const int fMaxEntries;
michael@0: 
michael@0:     struct Entry;
michael@0:     mutable Entry*  fHead;
michael@0:     mutable Entry*  fTail;
michael@0: 
michael@0:     inline Entry* detach(Entry*) const;
michael@0:     inline void attachToHead(Entry*) const;
michael@0: 
michael@0: #ifdef SK_DEBUG
michael@0:     void validate() const;
michael@0: #else
michael@0:     void validate() const {}
michael@0: #endif
michael@0: 
michael@0:     class AutoValidate : SkNoncopyable {
michael@0:     public:
michael@0:         AutoValidate(const SkBitmapCache* bc) : fBC(bc) { bc->validate(); }
michael@0:         ~AutoValidate() { fBC->validate(); }
michael@0:     private:
michael@0:         const SkBitmapCache* fBC;
michael@0:     };
michael@0: };
michael@0: 
michael@0: #endif