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
37 namespace blink {
38
DecodingImageGenerator(PassRefPtr<ImageFrameGenerator> frameGenerator,const SkImageInfo & info,size_t index)39 DecodingImageGenerator::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
~DecodingImageGenerator()47 DecodingImageGenerator::~DecodingImageGenerator()
48 {
49 }
50
onRefEncodedData()51 SkData* 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
onGetInfo(SkImageInfo * info)64 bool DecodingImageGenerator::onGetInfo(SkImageInfo* info)
65 {
66 *info = m_imageInfo;
67 return true;
68 }
69
onGetPixels(const SkImageInfo & info,void * pixels,size_t rowBytes,SkPMColor ctable[],int * ctableCount)70 bool 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
onGetYUV8Planes(SkISize sizes[3],void * planes[3],size_t rowBytes[3],SkYUVColorSpace * colorSpace)87 bool 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