// Copy copies src to dst.
func Copy(dst draw.Image, src image.Image) {
bd := src.Bounds().Intersect(dst.Bounds())
at := imageutil.NewAtFunc(src)
set := imageutil.NewSetFunc(dst)
imageutil.Parallel1D(bd, func(bd image.Rectangle) {
for y := bd.Min.Y; y < bd.Max.Y; y++ {
for x := bd.Min.X; x < bd.Max.X; x++ {
r, g, b, a := at(x, y)
set(x, y, r, g, b, a)
}
}
})
}
// Process implements imageserver/image.Processor.
//
// It doesn't return an error.
func (prc *Processor) Process(nim image.Image, params imageserver.Params) (image.Image, error) {
out := prc.newDrawable(nim)
bd := nim.Bounds().Intersect(out.Bounds())
at := imageutil.NewAtFunc(nim)
set := imageutil.NewSetFunc(out)
imageutil.Parallel1D(bd, func(bd image.Rectangle) {
for y := bd.Min.Y; y < bd.Max.Y; y++ {
for x := bd.Min.X; x < bd.Max.X; x++ {
r, g, b, a := at(x, y)
r, g, b, a = imageutil.RGBAToNRGBA(r, g, b, a)
r = uint32(prc.vals[uint16(r)])
g = uint32(prc.vals[uint16(g)])
b = uint32(prc.vals[uint16(b)])
r, g, b, a = imageutil.NRGBAToRGBA(r, g, b, a)
set(x, y, r, g, b, a)
}
}
})
return out, nil
}