forked from joejulian/gio
Admin
59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package f32color
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import (
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"image/color"
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"testing"
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)
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func TestNRGBAToLinearRGBA_Boundary(t *testing.T) {
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for col := 0; col <= 0xFF; col++ {
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for alpha := 0; alpha <= 0xFF; alpha++ {
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in := color.NRGBA{R: uint8(col), A: uint8(alpha)}
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premul := NRGBAToLinearRGBA(in)
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if premul.A != uint8(alpha) {
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t.Errorf("%v: got %v expected %v", in, premul.A, alpha)
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}
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if premul.R > premul.A {
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t.Errorf("%v: R=%v > A=%v", in, premul.R, premul.A)
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}
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}
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}
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}
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func TestLinearToRGBARoundtrip(t *testing.T) {
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for col := 0; col <= 0xFF; col++ {
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for alpha := 0; alpha <= 0xFF; alpha++ {
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want := color.NRGBA{R: uint8(col), A: uint8(alpha)}
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if alpha == 0 {
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want.R = 0
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}
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got := LinearFromSRGB(want).SRGB()
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if want != got {
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t.Errorf("got %v expected %v", got, want)
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}
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}
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}
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}
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var sink RGBA
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func BenchmarkLinearFromSRGB(b *testing.B) {
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b.Run("opaque", func(b *testing.B) {
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for i := 0; b.Loop(); i++ {
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sink = LinearFromSRGB(color.NRGBA{R: byte(i), G: byte(i >> 8), B: byte(i >> 16), A: 0xFF})
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}
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})
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b.Run("translucent", func(b *testing.B) {
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for i := 0; b.Loop(); i++ {
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sink = LinearFromSRGB(color.NRGBA{R: byte(i), G: byte(i >> 8), B: byte(i >> 16), A: 0x50})
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}
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})
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b.Run("transparent", func(b *testing.B) {
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for i := 0; b.Loop(); i++ {
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sink = LinearFromSRGB(color.NRGBA{R: byte(i), G: byte(i >> 8), B: byte(i >> 16), A: 0x00})
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}
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})
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}
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