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 namespace SkCodecAnimation { 12 /** 13 * This specifies how the next frame is based on this frame. 14 * 15 * Names are based on the GIF 89a spec. 16 * 17 * The numbers correspond to values in a GIF. 18 */ 19 enum class DisposalMethod { 20 /** 21 * The next frame should be drawn on top of this one. 22 * 23 * In a GIF, a value of 0 (not specified) is also treated as Keep. 24 */ 25 kKeep = 1, 26 27 /** 28 * Similar to Keep, except the area inside this frame's rectangle 29 * should be cleared to the BackGround color (transparent) before 30 * drawing the next frame. 31 */ 32 kRestoreBGColor = 2, 33 34 /** 35 * The next frame should be drawn on top of the previous frame - i.e. 36 * disregarding this one. 37 * 38 * In a GIF, a value of 4 is also treated as RestorePrevious. 39 */ 40 kRestorePrevious = 3, 41 }; 42 } 43 #endif // SkCodecAnimation_DEFINED 44