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Add TestComposition

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This commit is contained in:
Hajime Hoshi 2014-12-23 02:25:05 +09:00
parent 30adcdba94
commit 16180a8925
1 changed files with 77 additions and 7 deletions
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84
image_test.go
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@ -25,21 +25,34 @@ import (
"testing" "testing"
) )
func TestNewImageFromImage(t *testing.T) { func openImage(path string) (*Image, image.Image, error) {
file, err := os.Open("testdata/ebiten.png") file, err := os.Open(path)
if err != nil { if err != nil {
t.Fatal(err) return nil, nil, err
return
} }
defer file.Close() defer file.Close()
img, _, err := image.Decode(file) img, _, err := image.Decode(file)
if err != nil { if err != nil {
t.Fatal(err) return nil, nil, err
return
} }
eimg, err := NewImageFromImage(img, FilterNearest) eimg, err := NewImageFromImage(img, FilterNearest)
if err != nil {
return nil, nil, err
}
return eimg, img, nil
}
func diff(x, y uint8) uint8 {
if x <= y {
return y - x
}
return x - y
}
func TestPixels(t *testing.T) {
eimg, img, err := openImage("testdata/ebiten.png")
if err != nil { if err != nil {
t.Fatal(err) t.Fatal(err)
return return
@ -54,7 +67,64 @@ func TestNewImageFromImage(t *testing.T) {
got := eimg.At(i, j) got := eimg.At(i, j)
want := color.RGBAModel.Convert(img.At(i, j)) want := color.RGBAModel.Convert(img.At(i, j))
if got != want { if got != want {
t.Errorf("img(%d, %d): got %#v; want %#v", i, j, got, want) t.Errorf("img At(%d, %d): got %#v; want %#v", i, j, got, want)
}
}
}
}
func TestComposition(t *testing.T) {
img2Color := color.NRGBA{0x24, 0x3f, 0x6a, 0x88}
img3Color := color.NRGBA{0x85, 0xa3, 0x08, 0xd3}
img1, _, err := openImage("testdata/ebiten.png")
if err != nil {
t.Fatal(err)
return
}
w, h := img1.Bounds().Size().X, img1.Bounds().Size().Y
img2, err := NewImage(w, h, FilterNearest)
if err != nil {
t.Fatal(err)
return
}
img3, err := NewImage(w, h, FilterNearest)
if err != nil {
t.Fatal(err)
return
}
img2.Fill(img2Color)
img3.Fill(img3Color)
img_12_3, err := NewImage(w, h, FilterNearest)
if err != nil {
t.Fatal(err)
return
}
DrawWholeImage(img2, img1, GeometryMatrixI(), ColorMatrixI())
DrawWholeImage(img3, img2, GeometryMatrixI(), ColorMatrixI())
DrawWholeImage(img_12_3, img3, GeometryMatrixI(), ColorMatrixI())
img2.Fill(img2Color)
img3.Fill(img3Color)
img_1_23, err := NewImage(w, h, FilterNearest)
if err != nil {
t.Fatal(err)
return
}
DrawWholeImage(img3, img2, GeometryMatrixI(), ColorMatrixI())
DrawWholeImage(img3, img1, GeometryMatrixI(), ColorMatrixI())
DrawWholeImage(img_1_23, img3, GeometryMatrixI(), ColorMatrixI())
for j := 0; j < h; j++ {
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) {
t.Errorf("img_12_3.At(%d, %d) = %#v; img_1_23.At(%[1]d, %[2]d) = %#[4]v", i, j, c1, c2)
} }
} }
} }