1/* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "platform/graphics/DecodingImageGenerator.h" 28 29#include "SkData.h" 30#include "SkImageInfo.h" 31#include "platform/PlatformInstrumentation.h" 32#include "platform/RuntimeEnabledFeatures.h" 33#include "platform/SharedBuffer.h" 34#include "platform/TraceEvent.h" 35#include "platform/graphics/ImageFrameGenerator.h" 36 37namespace blink { 38 39DecodingImageGenerator::DecodingImageGenerator(PassRefPtr<ImageFrameGenerator> frameGenerator, const SkImageInfo& info, size_t index) 40 : m_frameGenerator(frameGenerator) 41 , m_imageInfo(info) 42 , m_frameIndex(index) 43 , m_generationId(0) 44{ 45} 46 47DecodingImageGenerator::~DecodingImageGenerator() 48{ 49} 50 51SkData* DecodingImageGenerator::onRefEncodedData() 52{ 53 // FIXME: If the image has been clipped or scaled, do not return the original 54 // encoded data, since on playback it will not be known how the clipping/scaling 55 // was done. 56 RefPtr<SharedBuffer> buffer = nullptr; 57 bool allDataReceived = false; 58 m_frameGenerator->copyData(&buffer, &allDataReceived); 59 if (buffer && allDataReceived) 60 return SkData::NewWithCopy(buffer->data(), buffer->size()); 61 return 0; 62} 63 64bool DecodingImageGenerator::onGetInfo(SkImageInfo* info) 65{ 66 *info = m_imageInfo; 67 return true; 68} 69 70bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, SkPMColor ctable[], int* ctableCount) 71{ 72 TRACE_EVENT1("blink", "DecodingImageGenerator::getPixels", "index", static_cast<int>(m_frameIndex)); 73 74 // Implementation doesn't support scaling yet so make sure we're not given a different size. 75 if (info.width() != m_imageInfo.width() || info.height() != m_imageInfo.height() || info.colorType() != m_imageInfo.colorType()) { 76 // ImageFrame may have changed the owning SkBitmap to kOpaque_SkAlphaType after sniffing the encoded data, so if we see a request 77 // for opaque, that is ok even if our initial alphatype was not opaque. 78 return false; 79 } 80 81 PlatformInstrumentation::willDecodeLazyPixelRef(m_generationId); 82 bool decoded = m_frameGenerator->decodeAndScale(m_imageInfo, m_frameIndex, pixels, rowBytes); 83 PlatformInstrumentation::didDecodeLazyPixelRef(); 84 return decoded; 85} 86 87bool DecodingImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3], SkYUVColorSpace* colorSpace) 88{ 89 if (!RuntimeEnabledFeatures::decodeToYUVEnabled()) 90 return false; 91 92 if (!planes || !planes[0]) 93 return m_frameGenerator->getYUVComponentSizes(sizes); 94 95 TRACE_EVENT0("blink", "DecodingImageGenerator::onGetYUV8Planes"); 96 PlatformInstrumentation::willDecodeLazyPixelRef(m_generationId); 97 bool decoded = m_frameGenerator->decodeToYUV(sizes, planes, rowBytes); 98 PlatformInstrumentation::didDecodeLazyPixelRef(); 99 if (colorSpace) 100 *colorSpace = kJPEG_SkYUVColorSpace; 101 return decoded; 102} 103 104} // namespace blink 105