1
2/*
3 * Copyright 2008 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10#ifndef SkImageRef_GlobalPool_DEFINED
11#define SkImageRef_GlobalPool_DEFINED
12
13#include "SkImageRef.h"
14
15class SkImageRef_GlobalPool : public SkImageRef {
16public:
17    // if pool is null, use the global pool
18    SkImageRef_GlobalPool(SkStream*, SkBitmap::Config, int sampleSize = 1);
19    virtual ~SkImageRef_GlobalPool();
20
21    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkImageRef_GlobalPool)
22
23    // API to control the global pool
24
25    /** Return the amount specified as the budget for the cache (in bytes).
26     */
27    static size_t GetRAMBudget();
28
29    /** Set a new budget value for the cache.
30     */
31    static void SetRAMBudget(size_t);
32
33    /** Return how much ram is currently in use by the global cache.
34     */
35    static size_t GetRAMUsed();
36
37    /** Free up (approximately) enough such that the amount used by the cache
38     is <= the specified amount. Since some images may be "in use", the
39     amount actually freed may not always result in a ram usage value <=
40     to the requested amount. In addition, because of the
41     chunky nature of the cache, the resulting usage may be < the requested
42     amount.
43     */
44    static void SetRAMUsed(size_t usageInBytes);
45
46    static void DumpPool();
47
48protected:
49    virtual bool onDecode(SkImageDecoder* codec, SkStream* stream,
50                          SkBitmap* bitmap, SkBitmap::Config config,
51                          SkImageDecoder::Mode mode);
52
53    virtual void onUnlockPixels();
54
55    SkImageRef_GlobalPool(SkFlattenableReadBuffer&);
56
57private:
58    typedef SkImageRef INHERITED;
59};
60
61#endif
62