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stevenbooru/vendor/src/github.com/disintegration/imaging/resize_test.go

282 lines
6.5 KiB
Go
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package imaging
import (
"image"
"testing"
)
func TestResize(t *testing.T) {
td := []struct {
desc string
src image.Image
w, h int
f ResampleFilter
want *image.NRGBA
}{
{
"Resize 2x2 1x1 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 1),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
1, 1,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 1, 1),
Stride: 1 * 4,
Pix: []uint8{0x40, 0x40, 0x40, 0xc0},
},
},
{
"Resize 2x2 2x2 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 1),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
2, 2,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 2, 2),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
},
{
"Resize 3x1 1x1 nearest",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 0),
Stride: 3 * 4,
Pix: []uint8{
0xff, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
1, 1,
NearestNeighbor,
&image.NRGBA{
Rect: image.Rect(0, 0, 1, 1),
Stride: 1 * 4,
Pix: []uint8{0x00, 0xff, 0x00, 0xff},
},
},
{
"Resize 2x2 0x4 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 1),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
0, 4,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 4, 4),
Stride: 4 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
},
{
"Resize 2x2 4x0 linear",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 1),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
4, 0,
Linear,
&image.NRGBA{
Rect: image.Rect(0, 0, 4, 4),
Stride: 4 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0xbf, 0x00, 0x00, 0xbf, 0xff, 0x00, 0x00, 0xff,
0x00, 0x40, 0x00, 0x40, 0x30, 0x30, 0x10, 0x70, 0x8f, 0x10, 0x30, 0xcf, 0xbf, 0x00, 0x40, 0xff,
0x00, 0xbf, 0x00, 0xbf, 0x10, 0x8f, 0x30, 0xcf, 0x30, 0x30, 0x8f, 0xef, 0x40, 0x00, 0xbf, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0xbf, 0x40, 0xff, 0x00, 0x40, 0xbf, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
},
}
for _, d := range td {
got := Resize(d.src, d.w, d.h, d.f)
want := d.want
if !compareNRGBA(got, want, 1) {
t.Errorf("test [%s] failed: %#v", d.desc, got)
}
}
}
func TestFit(t *testing.T) {
td := []struct {
desc string
src image.Image
w, h int
f ResampleFilter
want *image.NRGBA
}{
{
"Fit 2x2 1x10 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 1),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
1, 10,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 1, 1),
Stride: 1 * 4,
Pix: []uint8{0x40, 0x40, 0x40, 0xc0},
},
},
{
"Fit 2x2 10x1 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 1),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
10, 1,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 1, 1),
Stride: 1 * 4,
Pix: []uint8{0x40, 0x40, 0x40, 0xc0},
},
},
{
"Fit 2x2 10x10 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 1),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
10, 10,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 2, 2),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
},
},
},
}
for _, d := range td {
got := Fit(d.src, d.w, d.h, d.f)
want := d.want
if !compareNRGBA(got, want, 0) {
t.Errorf("test [%s] failed: %#v", d.desc, got)
}
}
}
func TestThumbnail(t *testing.T) {
td := []struct {
desc string
src image.Image
w, h int
f ResampleFilter
want *image.NRGBA
}{
{
"Thumbnail 6x2 1x1 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 5, 1),
Stride: 6 * 4,
Pix: []uint8{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
1, 1,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 1, 1),
Stride: 1 * 4,
Pix: []uint8{0x40, 0x40, 0x40, 0xc0},
},
},
{
"Thumbnail 2x6 1x1 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 5),
Stride: 2 * 4,
Pix: []uint8{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
1, 1,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 1, 1),
Stride: 1 * 4,
Pix: []uint8{0x40, 0x40, 0x40, 0xc0},
},
},
{
"Thumbnail 1x3 2x2 box",
&image.NRGBA{
Rect: image.Rect(-1, -1, 0, 2),
Stride: 1 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x00,
0xff, 0x00, 0x00, 0xff,
0xff, 0xff, 0xff, 0xff,
},
},
2, 2,
Box,
&image.NRGBA{
Rect: image.Rect(0, 0, 2, 2),
Stride: 2 * 4,
Pix: []uint8{
0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff,
0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff,
},
},
},
}
for _, d := range td {
got := Thumbnail(d.src, d.w, d.h, d.f)
want := d.want
if !compareNRGBA(got, want, 0) {
t.Errorf("test [%s] failed: %#v", d.desc, got)
}
}
}
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