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| 1 /* | 1 /* |
| 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. | 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
| (...skipping 28 matching lines...) Expand all Loading... |
| 39 // This class decodes the GIF image format. | 39 // This class decodes the GIF image format. |
| 40 class PLATFORM_EXPORT GIFImageDecoder : public ImageDecoder { | 40 class PLATFORM_EXPORT GIFImageDecoder : public ImageDecoder { |
| 41 WTF_MAKE_NONCOPYABLE(GIFImageDecoder); | 41 WTF_MAKE_NONCOPYABLE(GIFImageDecoder); |
| 42 public: | 42 public: |
| 43 GIFImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileO
ption, size_t maxDecodedBytes); | 43 GIFImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileO
ption, size_t maxDecodedBytes); |
| 44 virtual ~GIFImageDecoder(); | 44 virtual ~GIFImageDecoder(); |
| 45 | 45 |
| 46 enum GIFParseQuery { GIFSizeQuery, GIFFrameCountQuery }; | 46 enum GIFParseQuery { GIFSizeQuery, GIFFrameCountQuery }; |
| 47 | 47 |
| 48 // ImageDecoder | 48 // ImageDecoder |
| 49 virtual String filenameExtension() const OVERRIDE { return "gif"; } | 49 virtual String filenameExtension() const override { return "gif"; } |
| 50 virtual void setData(SharedBuffer* data, bool allDataReceived) OVERRIDE; | 50 virtual void setData(SharedBuffer* data, bool allDataReceived) override; |
| 51 virtual bool isSizeAvailable() OVERRIDE; | 51 virtual bool isSizeAvailable() override; |
| 52 virtual size_t frameCount() OVERRIDE; | 52 virtual size_t frameCount() override; |
| 53 virtual int repetitionCount() const OVERRIDE; | 53 virtual int repetitionCount() const override; |
| 54 virtual ImageFrame* frameBufferAtIndex(size_t) OVERRIDE; | 54 virtual ImageFrame* frameBufferAtIndex(size_t) override; |
| 55 virtual bool frameIsCompleteAtIndex(size_t) const OVERRIDE; | 55 virtual bool frameIsCompleteAtIndex(size_t) const override; |
| 56 virtual float frameDurationAtIndex(size_t) const OVERRIDE; | 56 virtual float frameDurationAtIndex(size_t) const override; |
| 57 virtual size_t clearCacheExceptFrame(size_t) OVERRIDE; | 57 virtual size_t clearCacheExceptFrame(size_t) override; |
| 58 // CAUTION: setFailed() deletes |m_reader|. Be careful to avoid | 58 // CAUTION: setFailed() deletes |m_reader|. Be careful to avoid |
| 59 // accessing deleted memory, especially when calling this from inside | 59 // accessing deleted memory, especially when calling this from inside |
| 60 // GIFImageReader! | 60 // GIFImageReader! |
| 61 virtual bool setFailed() OVERRIDE; | 61 virtual bool setFailed() override; |
| 62 | 62 |
| 63 // Callbacks from the GIF reader. | 63 // Callbacks from the GIF reader. |
| 64 bool haveDecodedRow(size_t frameIndex, GIFRow::const_iterator rowBegin, size
_t width, size_t rowNumber, unsigned repeatCount, bool writeTransparentPixels); | 64 bool haveDecodedRow(size_t frameIndex, GIFRow::const_iterator rowBegin, size
_t width, size_t rowNumber, unsigned repeatCount, bool writeTransparentPixels); |
| 65 bool frameComplete(size_t frameIndex); | 65 bool frameComplete(size_t frameIndex); |
| 66 | 66 |
| 67 // For testing. | 67 // For testing. |
| 68 bool parseCompleted() const; | 68 bool parseCompleted() const; |
| 69 | 69 |
| 70 private: | 70 private: |
| 71 virtual void clearFrameBuffer(size_t frameIndex) OVERRIDE; | 71 virtual void clearFrameBuffer(size_t frameIndex) override; |
| 72 | 72 |
| 73 // Parses as much as is needed to answer the query, ignoring bitmap | 73 // Parses as much as is needed to answer the query, ignoring bitmap |
| 74 // data. If parsing fails, sets the "decode failure" flag. | 74 // data. If parsing fails, sets the "decode failure" flag. |
| 75 void parse(GIFParseQuery); | 75 void parse(GIFParseQuery); |
| 76 | 76 |
| 77 // Decodes bitmap data of the frame. Depending on the disposal method | 77 // Decodes bitmap data of the frame. Depending on the disposal method |
| 78 // of prior frames, also decodes all required prior frames. If decoding | 78 // of prior frames, also decodes all required prior frames. If decoding |
| 79 // fails, sets the "decode failure" flag. | 79 // fails, sets the "decode failure" flag. |
| 80 void decode(size_t frameIndex); | 80 void decode(size_t frameIndex); |
| 81 | 81 |
| 82 // Called to initialize the frame buffer with the given index, based on | 82 // Called to initialize the frame buffer with the given index, based on |
| 83 // the previous frame's disposal method. Returns true on success. On | 83 // the previous frame's disposal method. Returns true on success. On |
| 84 // failure, this will mark the image as failed. | 84 // failure, this will mark the image as failed. |
| 85 bool initFrameBuffer(size_t frameIndex); | 85 bool initFrameBuffer(size_t frameIndex); |
| 86 | 86 |
| 87 bool m_currentBufferSawAlpha; | 87 bool m_currentBufferSawAlpha; |
| 88 mutable int m_repetitionCount; | 88 mutable int m_repetitionCount; |
| 89 OwnPtr<GIFImageReader> m_reader; | 89 OwnPtr<GIFImageReader> m_reader; |
| 90 }; | 90 }; |
| 91 | 91 |
| 92 } // namespace blink | 92 } // namespace blink |
| 93 | 93 |
| 94 #endif | 94 #endif |
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