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1 /* | 1 /* |
2 * Copyright (C) 2012 Google Inc. All rights reserved. | 2 * Copyright (C) 2012 Google 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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75 | 75 |
76 // Decodes and scales the specified frame at |index|. The dimensions and | 76 // Decodes and scales the specified frame at |index|. The dimensions and |
77 // output format are given in SkImageInfo. Decoded pixels are written into | 77 // output format are given in SkImageInfo. Decoded pixels are written into |
78 // |pixels| with a stride of |rowBytes|. Returns true if decoding was | 78 // |pixels| with a stride of |rowBytes|. Returns true if decoding was |
79 // successful. | 79 // successful. |
80 bool DecodeAndScale(SegmentReader*, | 80 bool DecodeAndScale(SegmentReader*, |
81 bool all_data_received, | 81 bool all_data_received, |
82 size_t index, | 82 size_t index, |
83 const SkImageInfo&, | 83 const SkImageInfo&, |
84 void* pixels, | 84 void* pixels, |
85 size_t row_bytes); | 85 size_t row_bytes, |
| 86 ImageDecoder::AlphaOption); |
86 | 87 |
87 // Decodes YUV components directly into the provided memory planes. Must not | 88 // Decodes YUV components directly into the provided memory planes. Must not |
88 // be called unless getYUVComponentSizes has been called and returned true. | 89 // be called unless getYUVComponentSizes has been called and returned true. |
89 // YUV decoding does not currently support progressive decoding. In order to | 90 // YUV decoding does not currently support progressive decoding. In order to |
90 // support it, ImageDecoder needs something analagous to its ImageFrame cache | 91 // support it, ImageDecoder needs something analagous to its ImageFrame cache |
91 // to hold partial planes, and the GPU code needs to handle them. | 92 // to hold partial planes, and the GPU code needs to handle them. |
92 bool DecodeToYUV(SegmentReader*, | 93 bool DecodeToYUV(SegmentReader*, |
93 size_t index, | 94 size_t index, |
94 const SkISize component_sizes[3], | 95 const SkISize component_sizes[3], |
95 void* planes[3], | 96 void* planes[3], |
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119 void SetImageDecoderFactory(std::unique_ptr<ImageDecoderFactory> factory) { | 120 void SetImageDecoderFactory(std::unique_ptr<ImageDecoderFactory> factory) { |
120 image_decoder_factory_ = std::move(factory); | 121 image_decoder_factory_ = std::move(factory); |
121 } | 122 } |
122 | 123 |
123 void SetHasAlpha(size_t index, bool has_alpha); | 124 void SetHasAlpha(size_t index, bool has_alpha); |
124 | 125 |
125 SkBitmap TryToResumeDecode(SegmentReader*, | 126 SkBitmap TryToResumeDecode(SegmentReader*, |
126 bool all_data_received, | 127 bool all_data_received, |
127 size_t index, | 128 size_t index, |
128 const SkISize& scaled_size, | 129 const SkISize& scaled_size, |
129 SkBitmap::Allocator*); | 130 SkBitmap::Allocator*, |
| 131 ImageDecoder::AlphaOption); |
130 // This method should only be called while m_decodeMutex is locked. | 132 // This method should only be called while m_decodeMutex is locked. |
131 bool Decode(SegmentReader*, | 133 bool Decode(SegmentReader*, |
132 bool all_data_received, | 134 bool all_data_received, |
133 size_t index, | 135 size_t index, |
134 ImageDecoder**, | 136 ImageDecoder**, |
135 SkBitmap*, | 137 SkBitmap*, |
136 SkBitmap::Allocator*); | 138 SkBitmap::Allocator*, |
| 139 ImageDecoder::AlphaOption); |
137 | 140 |
138 const SkISize full_size_; | 141 const SkISize full_size_; |
139 | 142 |
140 // Parameters used to create internal ImageDecoder objects. | 143 // Parameters used to create internal ImageDecoder objects. |
141 const ColorBehavior decoder_color_behavior_; | 144 const ColorBehavior decoder_color_behavior_; |
142 | 145 |
143 const bool is_multi_frame_; | 146 const bool is_multi_frame_; |
144 bool decode_failed_; | 147 bool decode_failed_; |
145 bool yuv_decoding_failed_; | 148 bool yuv_decoding_failed_; |
146 size_t frame_count_; | 149 size_t frame_count_; |
147 Vector<bool> has_alpha_; | 150 Vector<bool> has_alpha_; |
148 | 151 |
149 std::unique_ptr<ImageDecoderFactory> image_decoder_factory_; | 152 std::unique_ptr<ImageDecoderFactory> image_decoder_factory_; |
150 | 153 |
151 // Prevents multiple decode operations on the same data. | 154 // Prevents multiple decode operations on the same data. |
152 Mutex decode_mutex_; | 155 Mutex decode_mutex_; |
153 | 156 |
154 // Protect concurrent access to m_hasAlpha. | 157 // Protect concurrent access to m_hasAlpha. |
155 Mutex alpha_mutex_; | 158 Mutex alpha_mutex_; |
156 }; | 159 }; |
157 | 160 |
158 } // namespace blink | 161 } // namespace blink |
159 | 162 |
160 #endif | 163 #endif |
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