michael@0: 
michael@0: /*
michael@0:  * Copyright 2008 The Android Open Source Project
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 SkImageRef_GlobalPool_DEFINED
michael@0: #define SkImageRef_GlobalPool_DEFINED
michael@0: 
michael@0: #include "SkImageRef.h"
michael@0: 
michael@0: class SkImageRef_GlobalPool : public SkImageRef {
michael@0: public:
michael@0:     // if pool is null, use the global pool
michael@0:     SkImageRef_GlobalPool(const SkImageInfo&, SkStreamRewindable*,
michael@0:                           int sampleSize = 1);
michael@0:     virtual ~SkImageRef_GlobalPool();
michael@0: 
michael@0:     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkImageRef_GlobalPool)
michael@0: 
michael@0:     // API to control the global pool
michael@0: 
michael@0:     /** Return the amount specified as the budget for the cache (in bytes).
michael@0:      */
michael@0:     static size_t GetRAMBudget();
michael@0: 
michael@0:     /** Set a new budget value for the cache.
michael@0:      */
michael@0:     static void SetRAMBudget(size_t);
michael@0: 
michael@0:     /** Return how much ram is currently in use by the global cache.
michael@0:      */
michael@0:     static size_t GetRAMUsed();
michael@0: 
michael@0:     /** Free up (approximately) enough such that the amount used by the cache
michael@0:      is <= the specified amount. Since some images may be "in use", the
michael@0:      amount actually freed may not always result in a ram usage value <=
michael@0:      to the requested amount. In addition, because of the
michael@0:      chunky nature of the cache, the resulting usage may be < the requested
michael@0:      amount.
michael@0:      */
michael@0:     static void SetRAMUsed(size_t usageInBytes);
michael@0: 
michael@0:     static void DumpPool();
michael@0: 
michael@0: protected:
michael@0:     virtual bool onDecode(SkImageDecoder* codec, SkStreamRewindable* stream,
michael@0:                           SkBitmap* bitmap, SkBitmap::Config config,
michael@0:                           SkImageDecoder::Mode mode);
michael@0: 
michael@0:     virtual void onUnlockPixels();
michael@0: 
michael@0:     SkImageRef_GlobalPool(SkReadBuffer&);
michael@0: 
michael@0: private:
michael@0:     typedef SkImageRef INHERITED;
michael@0: };
michael@0: 
michael@0: #endif