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package gift
import (
"image"
"testing"
)
func TestPixelate(t *testing.T) {
testData := []struct {
desc string
size int
srcb, dstb image.Rectangle
srcPix, dstPix []uint8
}{
{
"pixelate (0)",
0,
image.Rect(-1, -1, 4, 2),
image.Rect(0, 0, 5, 3),
[]uint8{
0x00, 0x40, 0x00, 0x40, 0x00,
0x60, 0xB0, 0xA0, 0xB0, 0x60,
0x00, 0x80, 0x00, 0x80, 0x00,
},
[]uint8{
0x00, 0x40, 0x00, 0x40, 0x00,
0x60, 0xB0, 0xA0, 0xB0, 0x60,
0x00, 0x80, 0x00, 0x80, 0x00,
},
},
{
"pixelate (1)",
1,
image.Rect(-1, -1, 4, 2),
image.Rect(0, 0, 5, 3),
[]uint8{
0x00, 0x40, 0x00, 0x40, 0x00,
0x60, 0xB0, 0xA0, 0xB0, 0x60,
0x00, 0x80, 0x00, 0x80, 0x00,
},
[]uint8{
0x00, 0x40, 0x00, 0x40, 0x00,
0x60, 0xB0, 0xA0, 0xB0, 0x60,
0x00, 0x80, 0x00, 0x80, 0x00,
},
},
{
"pixelate (2)",
2,
image.Rect(-1, -1, 4, 2),
image.Rect(0, 0, 5, 3),
[]uint8{
0x00, 0x40, 0x00, 0x40, 0x00,
0x60, 0xB0, 0xA0, 0xB0, 0x60,
0x00, 0x80, 0x00, 0x80, 0x00,
},
[]uint8{
0x54, 0x54, 0x64, 0x64, 0x30,
0x54, 0x54, 0x64, 0x64, 0x30,
0x40, 0x40, 0x40, 0x40, 0x00,
},
},
{
"pixelate (3)",
3,
image.Rect(-1, -1, 4, 2),
image.Rect(0, 0, 5, 3),
[]uint8{
0x00, 0x40, 0x00, 0x40, 0x00,
0x60, 0xB0, 0xA0, 0xB0, 0x60,
0x00, 0x80, 0x00, 0x80, 0x00,
},
[]uint8{
0x45, 0x45, 0x45, 0x4d, 0x4d,
0x45, 0x45, 0x45, 0x4d, 0x4d,
0x45, 0x45, 0x45, 0x4d, 0x4d,
},
},
{
"pixelate (10)",
10,
image.Rect(-1, -1, 4, 2),
image.Rect(0, 0, 5, 3),
[]uint8{
0x00, 0x40, 0x00, 0x40, 0x00,
0x60, 0xB0, 0xA0, 0xB0, 0x60,
0x00, 0x80, 0x00, 0x80, 0x00,
},
[]uint8{
0x49, 0x49, 0x49, 0x49, 0x49,
0x49, 0x49, 0x49, 0x49, 0x49,
0x49, 0x49, 0x49, 0x49, 0x49,
},
},
{
"pixelate 0x0",
3,
image.Rect(-1, -1, -1, -1),
image.Rect(0, 0, 0, 0),
[]uint8{},
[]uint8{},
},
}
for _, d := range testData {
src := image.NewGray(d.srcb)
src.Pix = d.srcPix
f := Pixelate(d.size)
dst := image.NewGray(f.Bounds(src.Bounds()))
f.Draw(dst, src, nil)
if !checkBoundsAndPix(dst.Bounds(), d.dstb, dst.Pix, d.dstPix) {
t.Errorf("test [%s] failed: %#v, %#v", d.desc, dst.Bounds(), dst.Pix)
}
}
}
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