| /* |
| * Copyright (C) 2012 Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef LazyDecodingPixelRef_h |
| #define LazyDecodingPixelRef_h |
| |
| #include "SkFlattenableBuffers.h" |
| #include "SkPixelRef.h" |
| #include "SkRect.h" |
| #include "SkSize.h" |
| #include "SkTypes.h" |
| #include "platform/PlatformInstrumentation.h" |
| #include "skia/ext/lazy_pixel_ref.h" |
| |
| #include "wtf/RefPtr.h" |
| |
| using skia::LazyPixelRef; |
| |
| class SkData; |
| |
| namespace WebCore { |
| |
| class ImageFrameGenerator; |
| class ScaledImageFragment; |
| |
| class LazyDecodingPixelRef : public LazyPixelRef { |
| public: |
| LazyDecodingPixelRef(PassRefPtr<ImageFrameGenerator>, size_t index); |
| virtual ~LazyDecodingPixelRef(); |
| |
| SK_DECLARE_UNFLATTENABLE_OBJECT() |
| |
| PassRefPtr<ImageFrameGenerator> frameGenerator() const { return m_frameGenerator; } |
| size_t frameIndex() const { return m_frameIndex; } |
| |
| // Returns true if the image might already be decoded in the cache. |
| // Optimistic version of PrepareToDecode; requires less locking. |
| virtual bool MaybeDecoded(); |
| virtual bool PrepareToDecode(const LazyPixelRef::PrepareParams&); |
| virtual void Decode(); |
| |
| protected: |
| // SkPixelRef implementation. |
| virtual void* onLockPixels(SkColorTable**); |
| virtual void onUnlockPixels(); |
| virtual bool onLockPixelsAreWritable() const; |
| |
| virtual SkData* onRefEncodedData() SK_OVERRIDE; |
| |
| private: |
| RefPtr<ImageFrameGenerator> m_frameGenerator; |
| size_t m_frameIndex; |
| |
| const ScaledImageFragment* m_lockedImageResource; |
| PlatformInstrumentation::LazyPixelRefTracker m_objectTracker; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // LazyDecodingPixelRef_h_ |