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image: basic test for the 16-bits-per-color-channel types.

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R=r
CC=golang-dev
https://golang.org/cl/4635059
This commit is contained in:
Nigel Tao 2011-06-23 08:39:00 +10:00
parent c8443d7242
commit 6b4fb9f85a
1 changed files with 55 additions and 24 deletions
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79
src/pkg/image/image_test.go
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@ -8,6 +8,12 @@ import (
"testing" "testing"
) )
type image interface {
Image
Set(int, int, Color)
SubImage(Rectangle) Image
}
func cmp(t *testing.T, cm ColorModel, c0, c1 Color) bool { func cmp(t *testing.T, cm ColorModel, c0, c1 Color) bool {
r0, g0, b0, a0 := cm.Convert(c0).RGBA() r0, g0, b0, a0 := cm.Convert(c0).RGBA()
r1, g1, b1, a1 := cm.Convert(c1).RGBA() r1, g1, b1, a1 := cm.Convert(c1).RGBA()
@ -15,12 +21,7 @@ func cmp(t *testing.T, cm ColorModel, c0, c1 Color) bool {
} }
func TestImage(t *testing.T) { func TestImage(t *testing.T) {
type buffered interface { testImage := []image{
Image
Set(int, int, Color)
SubImage(Rectangle) Image
}
testImage := []Image{
NewRGBA(10, 10), NewRGBA(10, 10),
NewRGBA64(10, 10), NewRGBA64(10, 10),
NewNRGBA(10, 10), NewNRGBA(10, 10),
@ -35,36 +36,66 @@ func TestImage(t *testing.T) {
}), }),
} }
for _, m := range testImage { for _, m := range testImage {
b := m.(buffered) if !Rect(0, 0, 10, 10).Eq(m.Bounds()) {
if !Rect(0, 0, 10, 10).Eq(b.Bounds()) { t.Errorf("%T: want bounds %v, got %v", m, Rect(0, 0, 10, 10), m.Bounds())
t.Errorf("%T: want bounds %v, got %v", b, Rect(0, 0, 10, 10), b.Bounds())
continue continue
} }
if !cmp(t, b.ColorModel(), Transparent, b.At(6, 3)) { if !cmp(t, m.ColorModel(), Transparent, m.At(6, 3)) {
t.Errorf("%T: at (6, 3), want a zero color, got %v", b, b.At(6, 3)) t.Errorf("%T: at (6, 3), want a zero color, got %v", m, m.At(6, 3))
continue continue
} }
b.Set(6, 3, Opaque) m.Set(6, 3, Opaque)
if !cmp(t, b.ColorModel(), Opaque, b.At(6, 3)) { if !cmp(t, m.ColorModel(), Opaque, m.At(6, 3)) {
t.Errorf("%T: at (6, 3), want a non-zero color, got %v", b, b.At(6, 3)) t.Errorf("%T: at (6, 3), want a non-zero color, got %v", m, m.At(6, 3))
continue continue
} }
b = b.SubImage(Rect(3, 2, 9, 8)).(buffered) m = m.SubImage(Rect(3, 2, 9, 8)).(image)
if !Rect(3, 2, 9, 8).Eq(b.Bounds()) { if !Rect(3, 2, 9, 8).Eq(m.Bounds()) {
t.Errorf("%T: sub-image want bounds %v, got %v", b, Rect(3, 2, 9, 8), b.Bounds()) t.Errorf("%T: sub-image want bounds %v, got %v", m, Rect(3, 2, 9, 8), m.Bounds())
continue continue
} }
if !cmp(t, b.ColorModel(), Opaque, b.At(6, 3)) { if !cmp(t, m.ColorModel(), Opaque, m.At(6, 3)) {
t.Errorf("%T: sub-image at (6, 3), want a non-zero color, got %v", b, b.At(6, 3)) t.Errorf("%T: sub-image at (6, 3), want a non-zero color, got %v", m, m.At(6, 3))
continue continue
} }
if !cmp(t, b.ColorModel(), Transparent, b.At(3, 3)) { if !cmp(t, m.ColorModel(), Transparent, m.At(3, 3)) {
t.Errorf("%T: sub-image at (3, 3), want a zero color, got %v", b, b.At(3, 3)) t.Errorf("%T: sub-image at (3, 3), want a zero color, got %v", m, m.At(3, 3))
continue continue
} }
b.Set(3, 3, Opaque) m.Set(3, 3, Opaque)
if !cmp(t, b.ColorModel(), Opaque, b.At(3, 3)) { if !cmp(t, m.ColorModel(), Opaque, m.At(3, 3)) {
t.Errorf("%T: sub-image at (3, 3), want a non-zero color, got %v", b, b.At(3, 3)) t.Errorf("%T: sub-image at (3, 3), want a non-zero color, got %v", m, m.At(3, 3))
continue
}
}
}
func Test16BitsPerColorChannel(t *testing.T) {
testColorModel := []ColorModel{
RGBA64ColorModel,
NRGBA64ColorModel,
Alpha16ColorModel,
Gray16ColorModel,
}
for _, cm := range testColorModel {
c := cm.Convert(RGBA64Color{0x1234, 0x1234, 0x1234, 0x1234}) // Premultiplied alpha.
r, _, _, _ := c.RGBA()
if r != 0x1234 {
t.Errorf("%T: want red value 0x%04x got 0x%04x", c, 0x1234, r)
continue
}
}
testImage := []image{
NewRGBA64(10, 10),
NewNRGBA64(10, 10),
NewAlpha16(10, 10),
NewGray16(10, 10),
}
for _, m := range testImage {
m.Set(1, 2, NRGBA64Color{0xffff, 0xffff, 0xffff, 0x1357}) // Non-premultiplied alpha.
r, _, _, _ := m.At(1, 2).RGBA()
if r != 0x1357 {
t.Errorf("%T: want red value 0x%04x got 0x%04x", m, 0x1357, r)
continue continue
} }
} }