/*
* 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 89 a 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
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