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| 1 /* |
| 2 * Copyright 2016 Google Inc. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. |
| 6 */ |
| 7 |
| 8 #ifndef SkCodecAnimation_DEFINED |
| 9 #define SkCodecAnimation_DEFINED |
| 10 |
| 11 #include "SkCodec.h" |
| 12 #include "SkRect.h" |
| 13 |
| 14 class SkCodecAnimation { |
| 15 public: |
| 16 /** |
| 17 * This specifies how the next frame is based on this frame. |
| 18 * |
| 19 * Names are based on the GIF 89a spec. |
| 20 * |
| 21 * The numbers correspond to values in a GIF. |
| 22 */ |
| 23 enum DisposalMethod { |
| 24 /** |
| 25 * The next frame should be drawn on top of this one. |
| 26 * |
| 27 * In a GIF, a value of 0 (not specified) is also treated as Keep. |
| 28 */ |
| 29 Keep_DisposalMethod = 1, |
| 30 |
| 31 /** |
| 32 * Similar to Keep, except the area inside this frame's rectangle |
| 33 * should be cleared to the BackGround color (transparent) before |
| 34 * drawing the next frame. |
| 35 */ |
| 36 RestoreBGColor_DisposalMethod = 2, |
| 37 |
| 38 /** |
| 39 * The next frame should be drawn on top of the previous frame - i.e. |
| 40 * disregarding this one. |
| 41 * |
| 42 * In a GIF, a value of 4 is also treated as RestorePrevious. |
| 43 */ |
| 44 RestorePrevious_DisposalMethod = 3, |
| 45 }; |
| 46 |
| 47 struct FrameInfo : public SkCodec::FrameInfo { |
| 48 DisposalMethod fDisposalMethod; |
| 49 |
| 50 // The subset of the bounds that this frame describes. |
| 51 SkIRect fFrameRect; |
| 52 }; |
| 53 private: |
| 54 SkCodecAnimation(); |
| 55 }; |
| 56 #endif // SkCodecAnimation_DEFINED |
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