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/*
* 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.
*/
#include "config.h"
#include "LazyDecodingPixelRef.h"
#include "ImageDecoder.h"
#include "ImageDecodingStore.h"
#include "ImageFrameGenerator.h"
#include <wtf/MainThread.h>
namespace WebCore {
LazyDecodingPixelRef::LazyDecodingPixelRef(PassRefPtr<ImageFrameGenerator> frameGenerator, const SkISize& scaledSize, const SkIRect& scaledSubset)
: SkPixelRef(0)
, m_frameGenerator(frameGenerator)
, m_scaledSize(scaledSize)
, m_scaledSubset(scaledSubset)
, m_lockedCachedImage(0)
{
}
LazyDecodingPixelRef::~LazyDecodingPixelRef()
{
}
bool LazyDecodingPixelRef::isScaled(const SkISize& fullSize) const
{
return fullSize != m_scaledSize;
}
bool LazyDecodingPixelRef::isClipped() const
{
return m_scaledSize.width() != m_scaledSubset.width() || m_scaledSize.height() != m_scaledSubset.height();
}
void* LazyDecodingPixelRef::onLockPixels(SkColorTable**)
{
m_mutex.lock();
ASSERT(!m_lockedCachedImage);
m_lockedCachedImage = ImageDecodingStore::instance()->lockCompleteCache(m_frameGenerator.get(), m_scaledSize);
// Use ImageFrameGenerator to generate the image. It will lock the cache
// entry for us.
if (!m_lockedCachedImage)
m_lockedCachedImage = m_frameGenerator->decodeAndScale(m_scaledSize);
if (!m_lockedCachedImage)
return 0;
ASSERT(!m_lockedCachedImage->bitmap().isNull());
ASSERT(m_lockedCachedImage->scaledSize() == m_scaledSize);
return m_lockedCachedImage->bitmap().getAddr(m_scaledSubset.x(), m_scaledSubset.y());
}
void LazyDecodingPixelRef::onUnlockPixels()
{
if (m_lockedCachedImage) {
ImageDecodingStore::instance()->unlockCache(m_frameGenerator.get(), m_lockedCachedImage);
m_lockedCachedImage = 0;
}
m_mutex.unlock();
}
bool LazyDecodingPixelRef::onLockPixelsAreWritable() const
{
return false;
}
} // namespace WebKit
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