Disposal method of GIF frame.
Values
UNSPECIFIED
The disposal method is unspecified. Action on demand of viewer.
Mostly interpreted as NO_ACTION.
NO_ACTION
No action required.
FILL_BACKGROUND
Fill frame rectangle with background color.
Usage note: Most renderers clears to transparency instead of filling background color, when frame's transparent color index not equals to background color index.
RENDER_PREVIOUS
Render previous state of gif as it before rendering disposing frame.
UNDEFINED(index:Int)
Reserved disposal methods.