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graphics: Allow errors in TestImageLinear (#492)

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This commit is contained in:
Hajime Hoshi 2018-02-03 17:00:57 +09:00
parent 595e654123
commit e1640f5ae0
2 changed files with 21 additions and 9 deletions
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6
colorm_test.go
View File

@ -168,7 +168,7 @@ func TestColorMConcatSelf(t *testing.T) {
}
}
func abs(x uint32) uint32 {
func absU32(x uint32) uint32 {
if x < 0 {
return -x
}
@ -217,8 +217,8 @@ func TestColorMApply(t *testing.T) {
out := c.ColorM.Apply(c.In)
r0, g0, b0, a0 := out.RGBA()
r1, g1, b1, a1 := c.Out.RGBA()
if abs(r0-r1) > c.Delta || abs(g0-g1) > c.Delta ||
abs(b0-b1) > c.Delta || abs(a0-a1) > c.Delta {
if absU32(r0-r1) > c.Delta || absU32(g0-g1) > c.Delta ||
absU32(b0-b1) > c.Delta || absU32(a0-a1) > c.Delta {
println(r0, r1)
t.Errorf("%v.Apply(%v) = %v, want %v", c.ColorM, c.In, out, c.Out)
}

24
image_test.go
View File

@ -71,11 +71,23 @@ func openEbitenImage(path string) (*Image, image.Image, error) {
return eimg, img, nil
}
func diff(x, y uint8) uint8 {
if x <= y {
return y - x
func abs(x int) int {
if x < 0 {
return -x
}
return x - y
return x
}
// sameColors compares c1 and c2 and returns a boolean value indicating
// if the two colors are (almost) same.
//
// Pixels read from GPU might include errors (#492), and
// sameColors considers such errors as delta.
func sameColors(c1, c2 color.RGBA, delta int) bool {
return abs(int(c1.R)-int(c2.R)) <= delta &&
abs(int(c1.G)-int(c2.G)) <= delta &&
abs(int(c1.B)-int(c2.B)) <= delta &&
abs(int(c1.A)-int(c2.A)) <= delta
}
func TestImagePixels(t *testing.T) {
@ -184,7 +196,7 @@ func TestImageComposition(t *testing.T) {
for i := 0; i < w; i++ {
c1 := img_12_3.At(i, j).(color.RGBA)
c2 := img_1_23.At(i, j).(color.RGBA)
if 1 < diff(c1.R, c2.R) || 1 < diff(c1.G, c2.G) || 1 < diff(c1.B, c2.B) || 1 < diff(c1.A, c2.A) {
if !sameColors(c1, c2, 1) {
t.Errorf("img_12_3.At(%d, %d) = %#v; img_1_23.At(%[1]d, %[2]d) = %#[4]v", i, j, c1, c2)
}
if c1.A == 0 {
@ -603,7 +615,7 @@ func TestImageLinear(t *testing.T) {
c := color.RGBAModel.Convert(dst.At(i, j)).(color.RGBA)
got := c.G
want := uint8(0)
if got != want {
if abs(int(c.G)-int(want)) > 1 {
t.Errorf("dst At(%d, %d).G: got %#v, want: %#v", i, j, got, want)
}
}