Revert of Teach Skia to use discardable memory

Source/platform/graphics/DecodingImageGenerator.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 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 "platform/graphics/DecodingImageGenerator.h"
-
-#include "SkData.h"
-#include "SkImageInfo.h"
-#include "platform/SharedBuffer.h"
-#include "platform/TraceEvent.h"
-#include "platform/graphics/ImageFrameGenerator.h"
-
-namespace WebCore {
-
-DecodingImageGenerator::DecodingImageGenerator(PassRefPtr<ImageFrameGenerator> frameGenerator, const SkImageInfo& info, size_t index)
-    : m_frameGenerator(frameGenerator)
-    , m_imageInfo(info)
-    , m_frameIndex(index)
-{
-}
-
-DecodingImageGenerator::~DecodingImageGenerator()
-{
-}
-
-SkData* DecodingImageGenerator::refEncodedData()
-{
-    // FIXME: 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.
-    RefPtr<SharedBuffer> buffer = 0;
-    bool allDataReceived = false;
-    m_frameGenerator->copyData(&buffer, &allDataReceived);
-    if (buffer && allDataReceived) {
-        return SkData::NewWithCopy(buffer->data(), buffer->size());
-    }
-    return 0;
-}
-
-bool DecodingImageGenerator::getInfo(SkImageInfo* info)
-{
-    *info = m_imageInfo;
-    return true;
-}
-
-bool DecodingImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes)
-{
-    TRACE_EVENT1("webkit", "DecodingImageGenerator::getPixels", "index", static_cast<int>(m_frameIndex));
-
-    // Implementation doesn't support scaling yet so make sure we're not given
-    // a different size.
-    ASSERT(info.fWidth == m_imageInfo.fWidth);
-    ASSERT(info.fHeight == m_imageInfo.fHeight);
-    ASSERT(info.fColorType == m_imageInfo.fColorType);
-    ASSERT(info.fAlphaType == m_imageInfo.fAlphaType);
-    return m_frameGenerator->decodeAndScale(m_imageInfo, m_frameIndex, pixels, rowBytes);
-}
-
-} // namespace blink