michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 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: #ifndef SkImageRefPool_DEFINED
michael@0: #define SkImageRefPool_DEFINED
michael@0: 
michael@0: #include "SkTypes.h"
michael@0: 
michael@0: class SkImageRef;
michael@0: class SkImageRef_GlobalPool;
michael@0: 
michael@0: class SkImageRefPool {
michael@0: public:
michael@0:     SkImageRefPool();
michael@0:     ~SkImageRefPool();
michael@0: 
michael@0:     size_t  getRAMBudget() const { return fRAMBudget; }
michael@0:     void    setRAMBudget(size_t);
michael@0: 
michael@0:     size_t  getRAMUsed() const { return fRAMUsed; }
michael@0:     void    setRAMUsed(size_t limit);
michael@0: 
michael@0:     void addToHead(SkImageRef*);
michael@0:     void addToTail(SkImageRef*);
michael@0:     void detach(SkImageRef*);
michael@0: 
michael@0:     void dump() const;
michael@0: 
michael@0: private:
michael@0:     size_t fRAMBudget;
michael@0:     size_t fRAMUsed;
michael@0: 
michael@0:     int         fCount;
michael@0:     SkImageRef* fHead, *fTail;
michael@0: 
michael@0:     int computeCount() const;
michael@0: 
michael@0:     friend class SkImageRef_GlobalPool;
michael@0: 
michael@0:     void justAddedPixels(SkImageRef*);
michael@0:     void canLosePixels(SkImageRef*);
michael@0:     void purgeIfNeeded();
michael@0: };
michael@0: 
michael@0: #endif