| /* |
| * 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. |
| */ |
| |
| #ifndef ImageFrameGenerator_h |
| #define ImageFrameGenerator_h |
| |
| #include "platform/PlatformExport.h" |
| #include "platform/image-decoders/SegmentReader.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "third_party/skia/include/core/SkSize.h" |
| #include "third_party/skia/include/core/SkTypes.h" |
| #include "wtf/Allocator.h" |
| #include "wtf/Noncopyable.h" |
| #include "wtf/PassRefPtr.h" |
| #include "wtf/RefCounted.h" |
| #include "wtf/RefPtr.h" |
| #include "wtf/ThreadSafeRefCounted.h" |
| #include "wtf/ThreadingPrimitives.h" |
| #include "wtf/Vector.h" |
| #include <memory> |
| |
| class SkData; |
| struct SkYUVSizeInfo; |
| |
| namespace blink { |
| |
| class ImageDecoder; |
| |
| class PLATFORM_EXPORT ImageDecoderFactory { |
| USING_FAST_MALLOC(ImageDecoderFactory); |
| WTF_MAKE_NONCOPYABLE(ImageDecoderFactory); |
| |
| public: |
| ImageDecoderFactory() {} |
| virtual ~ImageDecoderFactory() {} |
| virtual std::unique_ptr<ImageDecoder> create() = 0; |
| }; |
| |
| class PLATFORM_EXPORT ImageFrameGenerator final |
| : public ThreadSafeRefCounted<ImageFrameGenerator> { |
| WTF_MAKE_NONCOPYABLE(ImageFrameGenerator); |
| |
| public: |
| static PassRefPtr<ImageFrameGenerator> create(const SkISize& fullSize, |
| bool isMultiFrame = false) { |
| return adoptRef(new ImageFrameGenerator(fullSize, isMultiFrame)); |
| } |
| |
| ~ImageFrameGenerator(); |
| |
| // Decodes and scales the specified frame at |index|. The dimensions and |
| // output format are given in SkImageInfo. Decoded pixels are written into |
| // |pixels| with a stride of |rowBytes|. Returns true if decoding was |
| // successful. |
| bool decodeAndScale(SegmentReader*, |
| bool allDataReceived, |
| size_t index, |
| const SkImageInfo&, |
| void* pixels, |
| size_t rowBytes); |
| |
| // Decodes YUV components directly into the provided memory planes. Must not |
| // be called unless getYUVComponentSizes has been called and returned true. |
| // YUV decoding does not currently support progressive decoding. In order to |
| // support it, ImageDecoder needs something analagous to its ImageFrame cache |
| // to hold partial planes, and the GPU code needs to handle them. |
| bool decodeToYUV(SegmentReader*, |
| size_t index, |
| const SkISize componentSizes[3], |
| void* planes[3], |
| const size_t rowBytes[3]); |
| |
| const SkISize& getFullSize() const { return m_fullSize; } |
| |
| bool isMultiFrame() const { return m_isMultiFrame; } |
| bool decodeFailed() const { return m_decodeFailed; } |
| |
| bool hasAlpha(size_t index); |
| |
| // Must not be called unless the SkROBuffer has all the data. YUV decoding |
| // does not currently support progressive decoding. See comment above on |
| // decodeToYUV(). |
| bool getYUVComponentSizes(SegmentReader*, SkYUVSizeInfo*); |
| |
| private: |
| ImageFrameGenerator(const SkISize& fullSize, bool isMultiFrame); |
| |
| friend class ImageFrameGeneratorTest; |
| friend class DeferredImageDecoderTest; |
| // For testing. |factory| will overwrite the default ImageDecoder creation |
| // logic if |factory->create()| returns non-zero. |
| void setImageDecoderFactory(std::unique_ptr<ImageDecoderFactory> factory) { |
| m_imageDecoderFactory = std::move(factory); |
| } |
| |
| void setHasAlpha(size_t index, bool hasAlpha); |
| |
| SkBitmap tryToResumeDecode(SegmentReader*, |
| bool allDataReceived, |
| size_t index, |
| const SkISize& scaledSize, |
| SkBitmap::Allocator*); |
| // This method should only be called while m_decodeMutex is locked. |
| bool decode(SegmentReader*, |
| bool allDataReceived, |
| size_t index, |
| ImageDecoder**, |
| SkBitmap*, |
| SkBitmap::Allocator*); |
| |
| const SkISize m_fullSize; |
| |
| const bool m_isMultiFrame; |
| bool m_decodeFailed; |
| bool m_yuvDecodingFailed; |
| size_t m_frameCount; |
| Vector<bool> m_hasAlpha; |
| |
| std::unique_ptr<ImageDecoderFactory> m_imageDecoderFactory; |
| |
| // Prevents multiple decode operations on the same data. |
| Mutex m_decodeMutex; |
| |
| // Protect concurrent access to m_hasAlpha. |
| Mutex m_alphaMutex; |
| }; |
| |
| } // namespace blink |
| |
| #endif |