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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 |
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76 size_t decodeFrameCount() override; | 76 size_t decodeFrameCount() override; |
77 void initializeNewFrame(size_t) override; | 77 void initializeNewFrame(size_t) override; |
78 void decode(size_t) override; | 78 void decode(size_t) override; |
79 | 79 |
80 // Parses as much as is needed to answer the query, ignoring bitmap | 80 // Parses as much as is needed to answer the query, ignoring bitmap |
81 // data. If parsing fails, sets the "decode failure" flag. | 81 // data. If parsing fails, sets the "decode failure" flag. |
82 void parse(GIFParseQuery); | 82 void parse(GIFParseQuery); |
83 | 83 |
84 // Reset the alpha tracker for this frame. Before calling this method, the | 84 // Reset the alpha tracker for this frame. Before calling this method, the |
85 // caller must verify that the frame exists. | 85 // caller must verify that the frame exists. |
86 void onInitFrameBuffer(size_t) override; | 86 bool onInitFrameBuffer(size_t) override; |
87 | 87 |
88 // When the disposal method of the frame is DisposeOverWritePrevious, the | 88 // When the disposal method of the frame is DisposeOverWritePrevious, the |
89 // next frame will use the previous frame's buffer as its starting state, so | 89 // next frame will use the previous frame's buffer as its starting state, so |
90 // we can't take over the data in that case. Before calling this method, the | 90 // we can't take over the data in that case. Before calling this method, the |
91 // caller must verify that the frame exists. | 91 // caller must verify that the frame exists. |
92 bool canReusePreviousFrameBuffer(size_t) const override; | 92 bool canReusePreviousFrameBuffer(size_t) const override; |
93 | 93 |
94 bool m_currentBufferSawAlpha; | 94 bool m_currentBufferSawAlpha; |
95 mutable int m_repetitionCount; | 95 mutable int m_repetitionCount; |
96 std::unique_ptr<GIFImageReader> m_reader; | 96 std::unique_ptr<GIFImageReader> m_reader; |
97 }; | 97 }; |
98 | 98 |
99 } // namespace blink | 99 } // namespace blink |
100 | 100 |
101 #endif | 101 #endif |
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