func newSimpleSetFunc(p image.Image) func(x, y int, c color.Color) {
switch p := p.(type) {
case draw.Image:
return p.Set
case *image.YCbCr:
return func(x, y int, c color.Color) {
c1 := color.YCbCrModel.Convert(c).(color.YCbCr)
yi := p.YOffset(x, y)
ci := p.COffset(x, y)
p.Y[yi] = c1.Y
p.Cb[ci] = c1.Cb
p.Cr[ci] = c1.Cr
}
case *image.Uniform:
return func(x, y int, c color.Color) {
p.C = c
}
default:
return nil
}
}