Moving GraphicsContext and dependencies from core to platform.

Source/core/platform/graphics/DeferredImageDecoder.cpp

-/*
- * 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
- * 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/DeferredImageDecoder.h"
-
-#include "core/platform/graphics/ImageFrameGenerator.h"
-#include "core/platform/graphics/LazyDecodingPixelRef.h"
-#include "wtf/PassOwnPtr.h"
-
-namespace WebCore {
-
-namespace {
-
-// URI label for a lazily decoded SkPixelRef.
-const char labelLazyDecoded[] = "lazy";
-
-} // namespace
-
-bool DeferredImageDecoder::s_enabled = false;
-
-DeferredImageDecoder::DeferredImageDecoder(PassOwnPtr<ImageDecoder> actualDecoder)
-    : m_allDataReceived(false)
-    , m_actualDecoder(actualDecoder)
-    , m_orientation(DefaultImageOrientation)
-    , m_repetitionCount(cAnimationNone)
-{
-}
-
-DeferredImageDecoder::~DeferredImageDecoder()
-{
-}
-
-PassOwnPtr<DeferredImageDecoder> DeferredImageDecoder::create(const SharedBuffer& data, ImageSource::AlphaOption alphaOption, ImageSource::GammaAndColorProfileOption gammaAndColorOption)
-{
-    OwnPtr<ImageDecoder> actualDecoder = ImageDecoder::create(data, alphaOption, gammaAndColorOption);
-    return actualDecoder ? adoptPtr(new DeferredImageDecoder(actualDecoder.release())) : nullptr;
-}
-
-PassOwnPtr<DeferredImageDecoder> DeferredImageDecoder::createForTesting(PassOwnPtr<ImageDecoder> decoder)
-{
-    return adoptPtr(new DeferredImageDecoder(decoder));
-}
-
-bool DeferredImageDecoder::isLazyDecoded(const SkBitmap& bitmap)
-{
-    return bitmap.pixelRef()
-        && bitmap.pixelRef()->getURI()
-        && !memcmp(bitmap.pixelRef()->getURI(), labelLazyDecoded, sizeof(labelLazyDecoded));
-}
-
-void DeferredImageDecoder::setEnabled(bool enabled)
-{
-    s_enabled = enabled;
-}
-
-String DeferredImageDecoder::filenameExtension() const
-{
-    return m_actualDecoder ? m_actualDecoder->filenameExtension() : m_filenameExtension;
-}
-
-ImageFrame* DeferredImageDecoder::frameBufferAtIndex(size_t index)
-{
-    prepareLazyDecodedFrames();
-    if (index < m_lazyDecodedFrames.size()) {
-        // ImageFrameGenerator has the latest known alpha state. There will
-        // be a performance boost if this frame is opaque.
-        m_lazyDecodedFrames[index]->setHasAlpha(m_frameGenerator->hasAlpha(index));
-        return m_lazyDecodedFrames[index].get();
-    }
-    if (m_actualDecoder)
-        return m_actualDecoder->frameBufferAtIndex(index);
-    return 0;
-}
-
-void DeferredImageDecoder::setData(SharedBuffer* data, bool allDataReceived)
-{
-    if (m_actualDecoder) {
-        m_data = data;
-        m_allDataReceived = allDataReceived;
-        m_actualDecoder->setData(data, allDataReceived);
-        prepareLazyDecodedFrames();
-    }
-
-    if (m_frameGenerator)
-        m_frameGenerator->setData(data, allDataReceived);
-}
-
-bool DeferredImageDecoder::isSizeAvailable()
-{
-    // m_actualDecoder is 0 only if image decoding is deferred and that
-    // means image header decoded successfully and size is available.
-    return m_actualDecoder ? m_actualDecoder->isSizeAvailable() : true;
-}
-
-IntSize DeferredImageDecoder::size() const
-{
-    return m_actualDecoder ? m_actualDecoder->size() : m_size;
-}
-
-IntSize DeferredImageDecoder::frameSizeAtIndex(size_t index) const
-{
-    // FIXME: Frame size is assumed to be uniform. This might not be true for
-    // future supported codecs.
-    return m_actualDecoder ? m_actualDecoder->frameSizeAtIndex(index) : m_size;
-}
-
-size_t DeferredImageDecoder::frameCount()
-{
-    return m_actualDecoder ? m_actualDecoder->frameCount() : m_lazyDecodedFrames.size();
-}
-
-int DeferredImageDecoder::repetitionCount() const
-{
-    return m_actualDecoder ? m_actualDecoder->repetitionCount() : m_repetitionCount;
-}
-
-size_t DeferredImageDecoder::clearCacheExceptFrame(size_t clearExceptFrame)
-{
-    // If image decoding is deferred then frame buffer cache is managed by
-    // the compositor and this call is ignored.
-    return m_actualDecoder ? m_actualDecoder->clearCacheExceptFrame(clearExceptFrame) : 0;
-}
-
-bool DeferredImageDecoder::frameHasAlphaAtIndex(size_t index) const
-{
-    if (m_actualDecoder)
-        return m_actualDecoder->frameHasAlphaAtIndex(index);
-    if (!m_frameGenerator->isMultiFrame())
-        return m_frameGenerator->hasAlpha(index);
-    return true;
-}
-
-bool DeferredImageDecoder::frameIsCompleteAtIndex(size_t index) const
-{
-    if (m_actualDecoder)
-        return m_actualDecoder->frameIsCompleteAtIndex(index);
-    if (index < m_lazyDecodedFrames.size())
-        return m_lazyDecodedFrames[index]->status() == ImageFrame::FrameComplete;
-    return false;
-}
-
-float DeferredImageDecoder::frameDurationAtIndex(size_t index) const
-{
-    if (m_actualDecoder)
-        return m_actualDecoder->frameDurationAtIndex(index);
-    if (index < m_lazyDecodedFrames.size())
-        return m_lazyDecodedFrames[index]->duration();
-    return 0;
-}
-
-unsigned DeferredImageDecoder::frameBytesAtIndex(size_t index) const
-{
-    // If frame decoding is deferred then it is not managed by MemoryCache
-    // so return 0 here.
-    return m_frameGenerator ? 0 : m_actualDecoder->frameBytesAtIndex(index);
-}
-
-ImageOrientation DeferredImageDecoder::orientation() const
-{
-    return m_actualDecoder ? m_actualDecoder->orientation() : m_orientation;
-}
-
-void DeferredImageDecoder::activateLazyDecoding()
-{
-    if (m_frameGenerator)
-        return;
-    m_size = m_actualDecoder->size();
-    m_orientation = m_actualDecoder->orientation();
-    m_filenameExtension = m_actualDecoder->filenameExtension();
-    const bool isSingleFrame = m_actualDecoder->repetitionCount() == cAnimationNone || (m_allDataReceived && m_actualDecoder->frameCount() == 1u);
-    m_frameGenerator = ImageFrameGenerator::create(SkISize::Make(m_actualDecoder->decodedSize().width(), m_actualDecoder->decodedSize().height()), m_data, m_allDataReceived, !isSingleFrame);
-}
-
-void DeferredImageDecoder::prepareLazyDecodedFrames()
-{
-    if (!s_enabled
-        || !m_actualDecoder
-        || !m_actualDecoder->isSizeAvailable()
-        || m_actualDecoder->filenameExtension() == "ico")
-        return;
-
-    activateLazyDecoding();
-
-    const size_t previousSize = m_lazyDecodedFrames.size();
-    m_lazyDecodedFrames.resize(m_actualDecoder->frameCount());
-    for (size_t i = previousSize; i < m_lazyDecodedFrames.size(); ++i) {
-        OwnPtr<ImageFrame> frame(adoptPtr(new ImageFrame()));
-        frame->setSkBitmap(createLazyDecodingBitmap(i));
-        frame->setDuration(m_actualDecoder->frameDurationAtIndex(i));
-        frame->setStatus(m_actualDecoder->frameIsCompleteAtIndex(i) ? ImageFrame::FrameComplete : ImageFrame::FramePartial);
-        m_lazyDecodedFrames[i] = frame.release();
-    }
-
-    // The last lazy decoded frame created from previous call might be
-    // incomplete so update its state.
-    if (previousSize)
-        m_lazyDecodedFrames[previousSize - 1]->setStatus(m_actualDecoder->frameIsCompleteAtIndex(previousSize - 1) ? ImageFrame::FrameComplete : ImageFrame::FramePartial);
-
-    if (m_allDataReceived) {
-        m_repetitionCount = m_actualDecoder->repetitionCount();
-        m_actualDecoder.clear();
-        m_data = nullptr;
-    }
-}
-
-SkBitmap DeferredImageDecoder::createLazyDecodingBitmap(size_t index)
-{
-    IntSize decodedSize = m_actualDecoder->decodedSize();
-    ASSERT(decodedSize.width() > 0);
-    ASSERT(decodedSize.height() > 0);
-
-    // Creates a lazily decoded SkPixelRef that references the entire image without scaling.
-    SkBitmap bitmap;
-    bitmap.setConfig(SkBitmap::kARGB_8888_Config, decodedSize.width(), decodedSize.height());
-    bitmap.setPixelRef(new LazyDecodingPixelRef(m_frameGenerator, index))->unref();
-
-    // Use the URI to identify this as a lazily decoded SkPixelRef of type LazyDecodingPixelRef.
-    // FIXME: It would be more useful to give the actual image URI.
-    bitmap.pixelRef()->setURI(labelLazyDecoded);
-
-    // Inform the bitmap that we will never change the pixels. This is a performance hint
-    // subsystems that may try to cache this bitmap (e.g. pictures, pipes, gpu, pdf, etc.)
-    bitmap.setImmutable();
-
-    return bitmap;
-}
-
-bool DeferredImageDecoder::hotSpot(IntPoint& hotSpot) const
-{
-    // TODO: Implement.
-    return m_actualDecoder ? m_actualDecoder->hotSpot(hotSpot) : false;
-}
-
-} // namespace WebCore