54 lines
1.3 KiB
Go
54 lines
1.3 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
|
|
|
|
package f32color
|
|
|
|
import (
|
|
"image/color"
|
|
"testing"
|
|
)
|
|
|
|
func TestNRGBAToRGBA_PostAlpha_Boundary(t *testing.T) {
|
|
for col := 0; col <= 0xFF; col++ {
|
|
for alpha := 0; alpha <= 0xFF; alpha++ {
|
|
in := color.NRGBA{R: uint8(col), A: uint8(alpha)}
|
|
premul := NRGBAToRGBA_PostAlpha(in)
|
|
if premul.A != uint8(alpha) {
|
|
t.Errorf("%v: got %v expected %v", in, premul.A, alpha)
|
|
}
|
|
if premul.R > premul.A {
|
|
t.Errorf("%v: R=%v > A=%v", in, premul.R, premul.A)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestNRGBAToLinearRGBA_Boundary(t *testing.T) {
|
|
for col := 0; col <= 0xFF; col++ {
|
|
for alpha := 0; alpha <= 0xFF; alpha++ {
|
|
in := color.NRGBA{R: uint8(col), A: uint8(alpha)}
|
|
premul := NRGBAToLinearRGBA(in)
|
|
if premul.A != uint8(alpha) {
|
|
t.Errorf("%v: got %v expected %v", in, premul.A, alpha)
|
|
}
|
|
if premul.R > premul.A {
|
|
t.Errorf("%v: R=%v > A=%v", in, premul.R, premul.A)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestLinearToRGBARoundtrip(t *testing.T) {
|
|
for col := 0; col <= 0xFF; col++ {
|
|
for alpha := 0; alpha <= 0xFF; alpha++ {
|
|
want := color.NRGBA{R: uint8(col), A: uint8(alpha)}
|
|
if alpha == 0 {
|
|
want.R = 0
|
|
}
|
|
got := LinearFromSRGB(want).SRGB()
|
|
if want != got {
|
|
t.Errorf("got %v expected %v", got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|