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* Copyright (C) 2012 Google Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "LazyDecodingPixelRef.h"
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#include "ImageDecoder.h"
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#include "ImageDecodingStore.h"
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#include "ImageFrameGenerator.h"
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#include <wtf/MainThread.h>
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LazyDecodingPixelRef::LazyDecodingPixelRef(PassRefPtr<ImageFrameGenerator> frameGenerator, const SkISize& scaledSize, const SkIRect& scaledSubset)
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, m_frameGenerator(frameGenerator)
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, m_scaledSize(scaledSize)
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, m_scaledSubset(scaledSubset)
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, m_lockedCachedImage(0)
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LazyDecodingPixelRef::~LazyDecodingPixelRef()
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bool LazyDecodingPixelRef::isScaled(const SkISize& fullSize) const
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return fullSize != m_scaledSize;
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bool LazyDecodingPixelRef::isClipped() const
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return m_scaledSize.width() != m_scaledSubset.width() || m_scaledSize.height() != m_scaledSubset.height();
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void* LazyDecodingPixelRef::onLockPixels(SkColorTable**)
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ASSERT(!m_lockedCachedImage);
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m_lockedCachedImage = ImageDecodingStore::instance()->lockCompleteCache(m_frameGenerator.get(), m_scaledSize);
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// Use ImageFrameGenerator to generate the image. It will lock the cache
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if (!m_lockedCachedImage)
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m_lockedCachedImage = m_frameGenerator->decodeAndScale(m_scaledSize);
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if (!m_lockedCachedImage)
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ASSERT(!m_lockedCachedImage->bitmap().isNull());
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ASSERT(m_lockedCachedImage->scaledSize() == m_scaledSize);
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return m_lockedCachedImage->bitmap().getAddr(m_scaledSubset.x(), m_scaledSubset.y());
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void LazyDecodingPixelRef::onUnlockPixels()
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if (m_lockedCachedImage) {
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ImageDecodingStore::instance()->unlockCache(m_frameGenerator.get(), m_lockedCachedImage);
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m_lockedCachedImage = 0;
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bool LazyDecodingPixelRef::onLockPixelsAreWritable() const