1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkCodecAnimation_DEFINED
#define SkCodecAnimation_DEFINED
namespace SkCodecAnimation {
/**
* This specifies how the next frame is based on this frame.
*
* Names are based on the GIF 89a spec.
*
* The numbers correspond to values in a GIF.
*/
enum class DisposalMethod {
/**
* The next frame should be drawn on top of this one.
*
* In a GIF, a value of 0 (not specified) is also treated as Keep.
*/
kKeep = 1,
/**
* Similar to Keep, except the area inside this frame's rectangle
* should be cleared to the BackGround color (transparent) before
* drawing the next frame.
*/
kRestoreBGColor = 2,
/**
* The next frame should be drawn on top of the previous frame - i.e.
* disregarding this one.
*
* In a GIF, a value of 4 is also treated as RestorePrevious.
*/
kRestorePrevious = 3,
};
/**
* How to blend the current frame.
*/
enum class Blend {
/**
* Blend with the prior frame as if using SkBlendMode::kSrcOver.
*/
kSrcOver,
/**
* Blend with the prior frame as if using SkBlendMode::kSrc.
*
* This frame's pixels replace the destination pixels.
*/
kSrc,
};
} // namespace SkCodecAnimation
#endif // SkCodecAnimation_DEFINED
|
