| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkImageCacherator_DEFINED |
| #define SkImageCacherator_DEFINED |
| |
| #include "SkImageGenerator.h" |
| #include "SkMutex.h" |
| #include "SkTemplates.h" |
| |
| class GrContext; |
| class SkBitmap; |
| |
| /* |
| * Internal class to manage caching the output of an ImageGenerator. |
| */ |
| class SkImageCacherator { |
| public: |
| // Takes ownership of the generator |
| static SkImageCacherator* NewFromGenerator(SkImageGenerator*, const SkIRect* subset = nullptr); |
| |
| const SkImageInfo& info() const { return fInfo; } |
| uint32_t uniqueID() const { return fUniqueID; } |
| |
| /** |
| * On success (true), bitmap will point to the pixels for this generator. If this returns |
| * false, the bitmap will be reset to empty. |
| */ |
| bool lockAsBitmap(SkBitmap*); |
| |
| /** |
| * Returns a ref() on the texture produced by this generator. The caller must call unref() |
| * when it is done. Will return nullptr on failure. |
| * |
| * The caller is responsible for calling texture->unref() when they are done. |
| */ |
| GrTexture* lockAsTexture(GrContext*, SkImageUsageType); |
| |
| /** |
| * If the underlying src naturally is represented by an encoded blob (in SkData), this returns |
| * a ref to that data. If not, it returns null. |
| */ |
| SkData* refEncoded(); |
| |
| private: |
| SkImageCacherator(SkImageGenerator*, const SkImageInfo&, const SkIPoint&, uint32_t uniqueID); |
| |
| bool generateBitmap(SkBitmap*); |
| bool tryLockAsBitmap(SkBitmap*); |
| |
| class ScopedGenerator { |
| SkImageCacherator* fCacher; |
| public: |
| ScopedGenerator(SkImageCacherator* cacher) : fCacher(cacher) { |
| fCacher->fMutexForGenerator.acquire(); |
| } |
| ~ScopedGenerator() { |
| fCacher->fMutexForGenerator.release(); |
| } |
| SkImageGenerator* operator->() const { return fCacher->fNotThreadSafeGenerator; } |
| operator SkImageGenerator*() const { return fCacher->fNotThreadSafeGenerator; } |
| }; |
| |
| SkMutex fMutexForGenerator; |
| SkAutoTDelete<SkImageGenerator> fNotThreadSafeGenerator; |
| |
| const SkImageInfo fInfo; |
| const SkIPoint fOrigin; |
| const uint32_t fUniqueID; |
| }; |
| |
| #endif |