/* * 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 FINAL : public LazyPixelRef { public: LazyDecodingPixelRef(const SkImageInfo&, 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() OVERRIDE; virtual bool PrepareToDecode(const LazyPixelRef::PrepareParams&) OVERRIDE; virtual void Decode() OVERRIDE; protected: // SkPixelRef implementation. virtual bool onNewLockPixels(LockRec*) OVERRIDE; virtual void onUnlockPixels() OVERRIDE; virtual bool onLockPixelsAreWritable() const OVERRIDE; virtual SkData* onRefEncodedData() OVERRIDE; private: RefPtr<ImageFrameGenerator> m_frameGenerator; size_t m_frameIndex; const ScaledImageFragment* m_lockedImageResource; PlatformInstrumentation::LazyPixelRefTracker m_objectTracker; }; } // namespace WebCore #endif // LazyDecodingPixelRef_h_