| /* |
| * 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 "core/platform/graphics/chromium/LazyDecodingPixelRef.h" |
| |
| #include "SkData.h" |
| #include "core/platform/graphics/chromium/ImageDecodingStore.h" |
| #include "core/platform/graphics/chromium/ImageFrameGenerator.h" |
| #include "platform/TraceEvent.h" |
| |
| namespace WebCore { |
| |
| LazyDecodingPixelRef::LazyDecodingPixelRef(PassRefPtr<ImageFrameGenerator> frameGenerator, const SkISize& scaledSize, size_t index, const SkIRect& scaledSubset) |
| : m_frameGenerator(frameGenerator) |
| , m_frameIndex(index) |
| , m_scaledSize(scaledSize) |
| , m_scaledSubset(scaledSubset) |
| , m_lockedImageResource(0) |
| , m_objectTracker(this) |
| { |
| } |
| |
| 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(); |
| } |
| |
| SkData* LazyDecodingPixelRef::onRefEncodedData() |
| { |
| // If the image has been clipped or scaled, do not return the original encoded data, since |
| // on playback it will not be known how the clipping/scaling was done. |
| if (isClipped() || isScaled(m_frameGenerator->getFullSize())) |
| return 0; |
| RefPtr<SharedBuffer> buffer = 0; |
| bool allDataReceived = false; |
| m_frameGenerator->copyData(&buffer, &allDataReceived); |
| if (buffer && allDataReceived) { |
| SkData* skdata = SkData::NewWithCopy((void*)buffer->data(), buffer->size()); |
| return skdata; |
| } |
| return 0; |
| } |
| |
| void* LazyDecodingPixelRef::onLockPixels(SkColorTable**) |
| { |
| TRACE_EVENT_ASYNC_BEGIN0("webkit", "LazyDecodingPixelRef::lockPixels", this); |
| |
| ASSERT(!m_lockedImageResource); |
| |
| if (!ImageDecodingStore::instance()->lockCache(m_frameGenerator.get(), m_scaledSize, m_frameIndex, &m_lockedImageResource)) |
| m_lockedImageResource = 0; |
| |
| // Use ImageFrameGenerator to generate the image. It will lock the cache |
| // entry for us. |
| if (!m_lockedImageResource) |
| m_lockedImageResource = m_frameGenerator->decodeAndScale(m_scaledSize, m_frameIndex); |
| |
| if (!m_lockedImageResource) |
| return 0; |
| |
| ASSERT(!m_lockedImageResource->bitmap().isNull()); |
| ASSERT(m_lockedImageResource->scaledSize() == m_scaledSize); |
| return m_lockedImageResource->bitmap().getAddr(m_scaledSubset.x(), m_scaledSubset.y()); |
| } |
| |
| void LazyDecodingPixelRef::onUnlockPixels() |
| { |
| if (m_lockedImageResource) { |
| ImageDecodingStore::instance()->unlockCache(m_frameGenerator.get(), m_lockedImageResource); |
| m_lockedImageResource = 0; |
| } |
| |
| TRACE_EVENT_ASYNC_END0("webkit", "LazyDecodingPixelRef::lockPixels", this); |
| } |
| |
| bool LazyDecodingPixelRef::onLockPixelsAreWritable() const |
| { |
| return false; |
| } |
| |
| bool LazyDecodingPixelRef::MaybeDecoded() |
| { |
| return ImageDecodingStore::instance()->isCached(m_frameGenerator.get(), m_scaledSize, m_frameIndex); |
| } |
| |
| bool LazyDecodingPixelRef::PrepareToDecode(const LazyPixelRef::PrepareParams& params) |
| { |
| ASSERT(false); |
| return false; |
| } |
| |
| void LazyDecodingPixelRef::Decode() |
| { |
| lockPixels(); |
| unlockPixels(); |
| } |
| |
| |
| } // namespace WebKit |