func drawCMYK(dst *image.RGBA, r image.Rectangle, src *image.CMYK, sp image.Point) {
i0 := (r.Min.X - dst.Rect.Min.X) * 4
i1 := (r.Max.X - dst.Rect.Min.X) * 4
si0 := (sp.X - src.Rect.Min.X) * 4
yMax := r.Max.Y - dst.Rect.Min.Y
y := r.Min.Y - dst.Rect.Min.Y
sy := sp.Y - src.Rect.Min.Y
for ; y != yMax; y, sy = y+1, sy+1 {
dpix := dst.Pix[y*dst.Stride:]
spix := src.Pix[sy*src.Stride:]
for i, si := i0, si0; i < i1; i, si = i+4, si+4 {
dpix[i+0], dpix[i+1], dpix[i+2] =
color.CMYKToRGB(spix[si+0], spix[si+1], spix[si+2], spix[si+3])
dpix[i+3] = 255
}
}
}
func drawCMYK(dst *image.RGBA, r image.Rectangle, src *image.CMYK, sp image.Point) {
// An image.CMYK is always fully opaque, and so if the mask is implicitly nil
// (i.e. fully opaque) then the op is effectively always Src.
i0 := (r.Min.X - dst.Rect.Min.X) * 4
i1 := (r.Max.X - dst.Rect.Min.X) * 4
si0 := (sp.X - src.Rect.Min.X) * 4
yMax := r.Max.Y - dst.Rect.Min.Y
y := r.Min.Y - dst.Rect.Min.Y
sy := sp.Y - src.Rect.Min.Y
for ; y != yMax; y, sy = y+1, sy+1 {
dpix := dst.Pix[y*dst.Stride:]
spix := src.Pix[sy*src.Stride:]
for i, si := i0, si0; i < i1; i, si = i+4, si+4 {
dpix[i+0], dpix[i+1], dpix[i+2] =
color.CMYKToRGB(spix[si+0], spix[si+1], spix[si+2], spix[si+3])
dpix[i+3] = 255
}
}
}