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graphics: Update TestImageScale

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This commit is contained in:
Hajime Hoshi 2017-02-05 16:05:19 +09:00
parent 4f45c0361d
commit 98054928ac
1 changed files with 25 additions and 23 deletions
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48
image_test.go
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@ -208,30 +208,32 @@ func TestImageSelf(t *testing.T) {
}
func TestImageScale(t *testing.T) {
img0, _, err := openEbitenImage("testdata/ebiten.png")
if err != nil {
t.Fatal(err)
return
}
w, h := img0.Size()
img1, err := NewImage(w*2, h*2, FilterNearest)
if err != nil {
t.Fatal(err)
return
}
op := &DrawImageOptions{}
op.GeoM.Scale(2, 2)
if err := img1.DrawImage(img0, op); err != nil {
t.Fatal(err)
return
}
for _, scale := range []int{2, 3, 4} {
img0, _, err := openEbitenImage("testdata/ebiten.png")
if err != nil {
t.Fatal(err)
return
}
w, h := img0.Size()
img1, err := NewImage(w*scale, h*scale, FilterNearest)
if err != nil {
t.Fatal(err)
return
}
op := &DrawImageOptions{}
op.GeoM.Scale(float64(scale), float64(scale))
if err := img1.DrawImage(img0, op); err != nil {
t.Fatal(err)
return
}
for j := 0; j < h*2; j++ {
for i := 0; i < w*2; i++ {
c0 := img0.At(i/2, j/2).(color.RGBA)
c1 := img1.At(i, j).(color.RGBA)
if c0 != c1 {
t.Errorf("img0.At(%[1]d, %[2]d) should equal to img1.At(%[3]d, %[4]d) but not: %[5]v vs %[6]v", i/2, j/2, i, j, c0, c1)
for j := 0; j < h*2; j++ {
for i := 0; i < w*2; i++ {
c0 := img0.At(i/scale, j/scale).(color.RGBA)
c1 := img1.At(i, j).(color.RGBA)
if c0 != c1 {
t.Errorf("img0.At(%[1]d, %[2]d) should equal to img1.At(%[3]d, %[4]d) (with scale %[5]d) but not: %[6]v vs %[7]v", i/2, j/2, i, j, scale, c0, c1)
}
}
}
}