saver

type Screen interface {
	DisplaySize() image.Point
	// Dirty begins a refresh of the content
	// specified by r.
	Dirty(r image.Rectangle) error
	// NextChunk returns the next chunk of the refresh.
	NextChunk() (draw.RGBA64Image, bool)
	Now() time.Time
}

type State struct {
	// contains filtered or unexported fields
}