| /* |
| * 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 "platform/graphics/DecodingImageGenerator.h" |
| |
| #include "platform/PlatformInstrumentation.h" |
| #include "platform/SharedBuffer.h" |
| #include "platform/TraceEvent.h" |
| #include "platform/graphics/ImageFrameGenerator.h" |
| #include "platform/image-decoders/ImageDecoder.h" |
| #include "platform/image-decoders/SegmentReader.h" |
| #include "third_party/skia/include/core/SkData.h" |
| #include <memory> |
| |
| namespace blink { |
| |
| DecodingImageGenerator::DecodingImageGenerator( |
| PassRefPtr<ImageFrameGenerator> frameGenerator, |
| const SkImageInfo& info, |
| PassRefPtr<SegmentReader> data, |
| bool allDataReceived, |
| size_t index, |
| uint32_t uniqueID) |
| : SkImageGenerator(info, uniqueID), |
| m_frameGenerator(frameGenerator), |
| m_data(data), |
| m_allDataReceived(allDataReceived), |
| m_frameIndex(index), |
| m_canYUVDecode(false) {} |
| |
| DecodingImageGenerator::~DecodingImageGenerator() {} |
| |
| SkData* DecodingImageGenerator::onRefEncodedData(GrContext* ctx) { |
| TRACE_EVENT0("blink", "DecodingImageGenerator::refEncodedData"); |
| |
| // The GPU only wants the data if it has all been received, since the GPU |
| // only wants a complete texture. getAsSkData() may require copying, so |
| // skip it and just return nullptr to avoid a slowdown. (See |
| // crbug.com/568016 for details about such a slowdown.) |
| // TODO (scroggo): Stop relying on the internal knowledge of how Skia uses |
| // this. skbug.com/5485 |
| if (ctx && !m_allDataReceived) |
| return nullptr; |
| |
| // Other clients are serializers, which want the data even if it requires |
| // copying, and even if the data is incomplete. (Otherwise they would |
| // potentially need to decode the partial image in order to re-encode it.) |
| return m_data->getAsSkData().release(); |
| } |
| |
| bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info, |
| void* pixels, |
| size_t rowBytes, |
| SkPMColor table[], |
| int* tableCount) { |
| TRACE_EVENT1("blink", "DecodingImageGenerator::getPixels", "frame index", |
| static_cast<int>(m_frameIndex)); |
| |
| // Implementation doesn't support scaling yet, so make sure we're not given a |
| // different size. |
| if (info.width() != getInfo().width() || info.height() != getInfo().height()) |
| return false; |
| |
| if (info.colorType() != getInfo().colorType()) { |
| // blink::ImageFrame may have changed the owning SkBitmap to |
| // kOpaque_SkAlphaType after fully decoding the image frame, so if we see a |
| // request for opaque, that is ok even if our initial alpha type was not |
| // opaque. |
| return false; |
| } |
| |
| PlatformInstrumentation::willDecodeLazyPixelRef(uniqueID()); |
| bool decoded = m_frameGenerator->decodeAndScale( |
| m_data.get(), m_allDataReceived, m_frameIndex, getInfo(), pixels, |
| rowBytes); |
| PlatformInstrumentation::didDecodeLazyPixelRef(); |
| |
| return decoded; |
| } |
| |
| bool DecodingImageGenerator::onQueryYUV8(SkYUVSizeInfo* sizeInfo, |
| SkYUVColorSpace* colorSpace) const { |
| // YUV decoding does not currently support progressive decoding. See comment |
| // in ImageFrameGenerator.h. |
| if (!m_canYUVDecode || !m_allDataReceived) |
| return false; |
| |
| TRACE_EVENT1("blink", "DecodingImageGenerator::queryYUV8", "sizes", |
| static_cast<int>(m_frameIndex)); |
| |
| if (colorSpace) |
| *colorSpace = kJPEG_SkYUVColorSpace; |
| |
| return m_frameGenerator->getYUVComponentSizes(m_data.get(), sizeInfo); |
| } |
| |
| bool DecodingImageGenerator::onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, |
| void* planes[3]) { |
| // YUV decoding does not currently support progressive decoding. See comment |
| // in ImageFrameGenerator.h. |
| ASSERT(m_canYUVDecode && m_allDataReceived); |
| |
| TRACE_EVENT1("blink", "DecodingImageGenerator::getYUV8Planes", "frame index", |
| static_cast<int>(m_frameIndex)); |
| |
| PlatformInstrumentation::willDecodeLazyPixelRef(uniqueID()); |
| bool decoded = |
| m_frameGenerator->decodeToYUV(m_data.get(), m_frameIndex, sizeInfo.fSizes, |
| planes, sizeInfo.fWidthBytes); |
| PlatformInstrumentation::didDecodeLazyPixelRef(); |
| |
| return decoded; |
| } |
| |
| SkImageGenerator* DecodingImageGenerator::create(SkData* data) { |
| RefPtr<SegmentReader> segmentReader = |
| SegmentReader::createFromSkData(sk_ref_sp(data)); |
| // We just need the size of the image, so we have to temporarily create an |
| // ImageDecoder. Since we only need the size, the premul and gamma settings |
| // don't really matter. |
| std::unique_ptr<ImageDecoder> decoder = ImageDecoder::create( |
| segmentReader, true, ImageDecoder::AlphaPremultiplied, |
| ImageDecoder::GammaAndColorProfileApplied); |
| if (!decoder || !decoder->isSizeAvailable()) |
| return nullptr; |
| |
| const IntSize size = decoder->size(); |
| const SkImageInfo info = |
| SkImageInfo::MakeN32Premul(size.width(), size.height()); |
| |
| RefPtr<ImageFrameGenerator> frame = ImageFrameGenerator::create( |
| SkISize::Make(size.width(), size.height()), false); |
| if (!frame) |
| return nullptr; |
| |
| return new DecodingImageGenerator(frame, info, segmentReader.release(), true, |
| 0); |
| } |
| |
| } // namespace blink |