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
11namespace 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