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| 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 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #ifndef ImageFrameGenerator_h | |
| 27 #define ImageFrameGenerator_h | |
| 28 | |
| 29 #include "SkBitmap.h" | |
| 30 #include "SkSize.h" | |
| 31 #include "SkTypes.h" | |
| 32 #include "platform/graphics/ThreadSafeDataTransport.h" | |
| 33 #include "wtf/PassOwnPtr.h" | |
| 34 #include "wtf/PassRefPtr.h" | |
| 35 #include "wtf/RefCounted.h" | |
| 36 #include "wtf/RefPtr.h" | |
| 37 #include "wtf/ThreadingPrimitives.h" | |
| 38 #include "wtf/ThreadSafeRefCounted.h" | |
| 39 #include "wtf/Vector.h" | |
| 40 | |
| 41 namespace WebCore { | |
| 42 | |
| 43 class ImageDecoder; | |
| 44 class ScaledImageFragment; | |
| 45 class SharedBuffer; | |
| 46 | |
| 47 class ImageDecoderFactory { | |
| 48 public: | |
| 49 virtual ~ImageDecoderFactory() { } | |
| 50 virtual PassOwnPtr<ImageDecoder> create() = 0; | |
| 51 }; | |
| 52 | |
| 53 class ImageFrameGenerator : public ThreadSafeRefCounted<ImageFrameGenerator> { | |
| 54 public: | |
| 55 static PassRefPtr<ImageFrameGenerator> create(const SkISize& fullSize, PassR
efPtr<SharedBuffer> data, bool allDataReceived, bool isMultiFrame = false) | |
| 56 { | |
| 57 return adoptRef(new ImageFrameGenerator(fullSize, data, allDataReceived,
isMultiFrame)); | |
| 58 } | |
| 59 | |
| 60 ImageFrameGenerator(const SkISize& fullSize, PassRefPtr<SharedBuffer>, bool
allDataReceived, bool isMultiFrame); | |
| 61 ~ImageFrameGenerator(); | |
| 62 | |
| 63 const ScaledImageFragment* decodeAndScale(const SkISize& scaledSize, size_t
index = 0); | |
| 64 | |
| 65 void setData(PassRefPtr<SharedBuffer>, bool allDataReceived); | |
| 66 | |
| 67 // Creates a new SharedBuffer containing the data received so far. | |
| 68 void copyData(RefPtr<SharedBuffer>*, bool* allDataReceived); | |
| 69 | |
| 70 SkISize getFullSize() const { return m_fullSize; } | |
| 71 | |
| 72 bool isMultiFrame() const { return m_isMultiFrame; } | |
| 73 | |
| 74 // FIXME: Return alpha state for each frame. | |
| 75 bool hasAlpha(size_t); | |
| 76 | |
| 77 private: | |
| 78 friend class ImageFrameGeneratorTest; | |
| 79 friend class DeferredImageDecoderTest; | |
| 80 // For testing. |factory| will overwrite the default ImageDecoder creation l
ogic if |factory->create()| returns non-zero. | |
| 81 void setImageDecoderFactory(PassOwnPtr<ImageDecoderFactory> factory) { m_ima
geDecoderFactory = factory; } | |
| 82 // For testing. | |
| 83 SkBitmap::Allocator* allocator() const { return m_allocator.get(); } | |
| 84 void setAllocator(PassOwnPtr<SkBitmap::Allocator> allocator) { m_allocator =
allocator; } | |
| 85 | |
| 86 // These methods are called while m_decodeMutex is locked. | |
| 87 const ScaledImageFragment* tryToLockCompleteCache(const SkISize& scaledSize,
size_t index); | |
| 88 const ScaledImageFragment* tryToScale(const ScaledImageFragment* fullSizeIma
ge, const SkISize& scaledSize, size_t index); | |
| 89 const ScaledImageFragment* tryToResumeDecodeAndScale(const SkISize& scaledSi
ze, size_t index); | |
| 90 | |
| 91 // Use the given decoder to decode. If a decoder is not given then try to cr
eate one. | |
| 92 PassOwnPtr<ScaledImageFragment> decode(size_t index, ImageDecoder**); | |
| 93 | |
| 94 // Return the next generation ID of a new image object. This is used | |
| 95 // to identify images of the same frame from different stages of | |
| 96 // progressive decode. | |
| 97 size_t nextGenerationId() { return m_decodeCount++; } | |
| 98 | |
| 99 SkISize m_fullSize; | |
| 100 ThreadSafeDataTransport m_data; | |
| 101 bool m_isMultiFrame; | |
| 102 bool m_decodeFailedAndEmpty; | |
| 103 Vector<bool> m_hasAlpha; | |
| 104 size_t m_decodeCount; | |
| 105 OwnPtr<SkBitmap::Allocator> m_allocator; | |
| 106 | |
| 107 OwnPtr<ImageDecoderFactory> m_imageDecoderFactory; | |
| 108 | |
| 109 // Prevents multiple decode operations on the same data. | |
| 110 Mutex m_decodeMutex; | |
| 111 | |
| 112 // Protect concurrent access to m_hasAlpha. | |
| 113 Mutex m_alphaMutex; | |
| 114 }; | |
| 115 | |
| 116 } // namespace WebCore | |
| 117 | |
| 118 #endif | |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk