mirror of
https://git.sr.ht/~eliasnaur/gio
synced 2026-07-03 16:35:36 +00:00
Egon Elbre
f114acdb02
iconvg seems to expect a linear premultiplied color. Fixes gio#132 Signed-off-by: Egon Elbre <egonelbre@gmail.com>
39 lines
941 B
Go
39 lines
941 B
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 TestNRGBAToRGBA_PostAlpha_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 := NRGBAToRGBA_PostAlpha(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 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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