reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 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 SkImageRef_GlobalPool_DEFINED |
| 18 | #define SkImageRef_GlobalPool_DEFINED |
| 19 | |
| 20 | #include "SkImageRef.h" |
| 21 | |
| 22 | class SkImageRef_GlobalPool : public SkImageRef { |
| 23 | public: |
| 24 | // if pool is null, use the global pool |
| 25 | SkImageRef_GlobalPool(SkStream*, SkBitmap::Config, int sampleSize = 1); |
| 26 | virtual ~SkImageRef_GlobalPool(); |
| 27 | |
| 28 | // overrides |
| 29 | virtual Factory getFactory() const { |
| 30 | return Create; |
| 31 | } |
| 32 | static SkPixelRef* Create(SkFlattenableReadBuffer&); |
| 33 | |
| 34 | // API to control the global pool |
| 35 | |
| 36 | /** Return the amount specified as the budget for the cache (in bytes). |
| 37 | */ |
| 38 | static size_t GetRAMBudget(); |
| 39 | |
| 40 | /** Set a new budget value for the cache. |
| 41 | */ |
| 42 | static void SetRAMBudget(size_t); |
| 43 | |
| 44 | /** Return how much ram is currently in use by the global cache. |
| 45 | */ |
| 46 | static size_t GetRAMUsed(); |
| 47 | |
| 48 | /** Free up (approximately) enough such that the amount used by the cache |
| 49 | is <= the specified amount. Since some images may be "in use", the |
| 50 | amount actually freed may not always result in a ram usage value <= |
| 51 | to the requested amount. In addition, because of the |
| 52 | chunky nature of the cache, the resulting usage may be < the requested |
| 53 | amount. |
| 54 | */ |
| 55 | static void SetRAMUsed(size_t usageInBytes); |
| 56 | |
| 57 | static void DumpPool(); |
| 58 | |
| 59 | protected: |
| 60 | virtual bool onDecode(SkImageDecoder* codec, SkStream* stream, |
| 61 | SkBitmap* bitmap, SkBitmap::Config config, |
| 62 | SkImageDecoder::Mode mode); |
| 63 | |
| 64 | virtual void onUnlockPixels(); |
| 65 | |
| 66 | SkImageRef_GlobalPool(SkFlattenableReadBuffer&); |
| 67 | |
| 68 | private: |
| 69 | typedef SkImageRef INHERITED; |
| 70 | }; |
| 71 | |
| 72 | #endif |