func newAtFuncAlpha16(p *image.Alpha16) AtFunc {
return func(x, y int) (r, g, b, a uint32) {
i := p.PixOffset(x, y)
a = uint32(p.Pix[i+0])<<8 | uint32(p.Pix[i+1])
return a, a, a, a
}
}
func newSetFuncAlpha16(p *image.Alpha16) SetFunc {
return func(x, y int, r, g, b, a uint32) {
i := p.PixOffset(x, y)
a16 := uint16(a)
p.Pix[i+0] = uint8(a16 >> 8)
p.Pix[i+1] = uint8(a16)
}
}