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graphics: Add TestSprites

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This commit is contained in:
Hajime Hoshi 2018-05-29 02:20:33 +09:00
parent 5f3a42aab9
commit 351c048e2f
1 changed files with 32 additions and 4 deletions
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36
image_test.go
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@ -584,14 +584,14 @@ func TestImageEdge(t *testing.T) {
}
}
func indexToColor(index int) uint8 {
return uint8((17*index + 0x40) % 256)
}
// Issue #419
func TestImageTooManyFill(t *testing.T) {
const width = 1024
indexToColor := func(index int) uint8 {
return uint8((17*index + 0x40) % 256)
}
src, _ := NewImage(1, 1, FilterNearest)
dst, _ := NewImage(width, 1, FilterNearest)
for i := 0; i < width; i++ {
@ -833,3 +833,31 @@ func TestImageStretch(t *testing.T) {
}
}
}
func TestSprites(t *testing.T) {
const (
width = 512
height = 512
)
src, _ := NewImage(4, 4, FilterNearest)
src.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
dst, _ := NewImage(width, height, FilterNearest)
for j := 0; j < height/4; j++ {
for i := 0; i < width/4; i++ {
op := &DrawImageOptions{}
op.GeoM.Translate(float64(i*4), float64(j*4))
dst.DrawImage(src, op)
}
}
for j := 0; j < height/4; j++ {
for i := 0; i < width/4; i++ {
got := color.RGBAModel.Convert(dst.At(i*4, j*4)).(color.RGBA)
want := color.RGBA{0xff, 0xff, 0xff, 0xff}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got %#v, want: %#v", i*4, j*4, got, want)
}
}
}
}