Golang image.Alpha.ColorModel function example

package image

 func (p *Alpha) ColorModel() color.Model
  

Golang image.Alpha.ColorModel function usage example ( taken from http://golang.org/src/pkg/image/image_test.go )

 func cmp(t *testing.T, cm color.Model, c0, c1 color.Color) bool {
 r0, g0, b0, a0 := cm.Convert(c0).RGBA()
 r1, g1, b1, a1 := cm.Convert(c1).RGBA()
 return r0 == r1 && g0 == g1 && b0 == b1 && a0 == a1
 }

 testImage := []image{
 NewRGBA(Rect(0, 0, 10, 10)),
 NewRGBA64(Rect(0, 0, 10, 10)),
 NewNRGBA(Rect(0, 0, 10, 10)),
 NewNRGBA64(Rect(0, 0, 10, 10)),
 NewAlpha(Rect(0, 0, 10, 10)),
 NewAlpha16(Rect(0, 0, 10, 10)),
 NewGray(Rect(0, 0, 10, 10)),
 NewGray16(Rect(0, 0, 10, 10)),
 NewPaletted(Rect(0, 0, 10, 10), color.Palette{
 Transparent,
 Opaque,
 }),
 }
 for _, m := range testImage {
 if !cmp(t, m.ColorModel(), Transparent, m.At(6, 3)) {
 t.Errorf("%T: at (6, 3), want a zero color, got %v", m, m.At(6, 3))
 continue
 }

References :

http://golang.org/src/pkg/image/image_test.go

http://golang.org/pkg/image/#Alpha.ColorModel