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adjust_test.go
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package imaging
import (
"image"
"image/color"
"path/filepath"
"testing"
)
func TestGrayscale(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
src image.Image
want *image.NRGBA
}{
{
"Grayscale 3x3",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0x3d, 0x3d, 0x3d, 0x01, 0x78, 0x78, 0x78, 0x02, 0x17, 0x17, 0x17, 0x03,
0x1f, 0x1f, 0x1f, 0xff, 0x25, 0x25, 0x25, 0xff, 0x66, 0x66, 0x66, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
}
for _, tc := range testCases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
got := Grayscale(tc.src)
if !compareNRGBA(got, tc.want, 0) {
t.Fatalf("got result %#v want %#v", got, tc.want)
}
})
}
}
func BenchmarkGrayscale(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
Grayscale(testdataBranchesJPG)
}
}
func TestInvert(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
src image.Image
want *image.NRGBA
}{
{
"Invert 3x3",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0x33, 0xff, 0xff, 0x01, 0xff, 0x33, 0xff, 0x02, 0xff, 0xff, 0x33, 0x03,
0xee, 0xdd, 0xcc, 0xff, 0xcc, 0xdd, 0xee, 0xff, 0x55, 0xcc, 0x44, 0xff,
0xff, 0xff, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0xff, 0x00, 0x00, 0x00, 0xff,
},
},
},
}
for _, tc := range testCases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
got := Invert(tc.src)
if !compareNRGBA(got, tc.want, 0) {
t.Fatalf("got result %#v want %#v", got, tc.want)
}
})
}
}
func BenchmarkInvert(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
Invert(testdataBranchesJPG)
}
}
func TestAdjustSaturation(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
src image.Image
p float64
want *image.NRGBA
}{
{
"AdjustSaturation 3x3 10",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
10,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x0f, 0x22, 0x35, 0xff, 0x35, 0x22, 0x0f, 0xff, 0xaf, 0x2c, 0xc2, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustSaturation 3x3 100",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
100,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x00, 0x22, 0x44, 0xff, 0x44, 0x22, 0x00, 0xff, 0xd0, 0x00, 0xee, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustSaturation 3x3 -10",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
-10,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xc2, 0x0a, 0x0a, 0x01, 0x0a, 0xc2, 0x0a, 0x02, 0x0a, 0x0a, 0xc2, 0x03,
0x13, 0x22, 0x31, 0xff, 0x31, 0x22, 0x13, 0xff, 0xa5, 0x3a, 0xb4, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustSaturation 3x3 -100",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
-100,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0x66, 0x66, 0x66, 0x01, 0x66, 0x66, 0x66, 0x02, 0x66, 0x66, 0x66, 0x03,
0x22, 0x22, 0x22, 0xff, 0x22, 0x22, 0x22, 0xff, 0x77, 0x77, 0x77, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustSaturation 3x3 0",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
0,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
}
for _, tc := range testCases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
got := AdjustSaturation(tc.src, tc.p)
if !compareNRGBA(got, tc.want, 0) {
t.Fatalf("got result %#v want %#v", got, tc.want)
}
})
}
}
func TestAdjustSaturationGolden(t *testing.T) {
t.Parallel()
for name, p := range map[string]float64{
"out_saturation_m30.png": -30,
"out_saturation_p30.png": 30,
} {
got := AdjustSaturation(testdataFlowersSmallPNG, p)
want, err := Open(filepath.Join("testdata", name))
if err != nil {
t.Fatalf("failed to open image: %v", err)
}
if !compareNRGBAGolden(got, toNRGBA(want)) {
t.Errorf("resulting image differs from golden: %s", name)
}
}
}
func BenchmarkAdjustSaturation(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
AdjustSaturation(testdataBranchesJPG, 10)
}
}
func TestAdjustHue(t *testing.T) {
t.Parallel()
srcPix := []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
}
pix180 := []uint8{
0x00, 0xcc, 0xcc, 0x01, 0xcc, 0x00, 0xcc, 0x02, 0xcc, 0xcc, 0x00, 0x03,
0x33, 0x22, 0x11, 0xff, 0x11, 0x22, 0x33, 0xff, 0x44, 0xbb, 0x33, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
}
testCases := []struct {
name string
src image.Image
p float64
want *image.NRGBA
}{
{
"AdjustHue 3x3 -540",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
-540,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: pix180,
},
},
{
"AdjustHue 3x3 -360",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
-360,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: srcPix,
},
},
{
"AdjustHue 3x3 -350",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
-350,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x22, 0x00, 0x01, 0x00, 0xcc, 0x22, 0x02, 0x22, 0x00, 0xcc, 0x03,
0x11, 0x1c, 0x33, 0xff, 0x33, 0x28, 0x11, 0xff, 0xbb, 0x33, 0xb5, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustHue 3x3 -180",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
-180,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: pix180,
},
},
{
"AdjustHue 3x3 -10",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
-10,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x22, 0x01, 0x22, 0xcc, 0x00, 0x02, 0x00, 0x22, 0xcc, 0x03,
0x11, 0x28, 0x33, 0xff, 0x33, 0x1c, 0x11, 0xff, 0x93, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustHue 3x3 0",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
0,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: srcPix,
},
},
{
"AdjustHue 3x3 10",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
10,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x22, 0x00, 0x01, 0x00, 0xcc, 0x22, 0x02, 0x22, 0x00, 0xcc, 0x03,
0x11, 0x1c, 0x33, 0xff, 0x33, 0x28, 0x11, 0xff, 0xbb, 0x33, 0xb5, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustHue 3x3 180",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
180,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: pix180,
},
},
{
"AdjustHue 3x3 350",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
350,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x22, 0x01, 0x22, 0xcc, 0x00, 0x02, 0x00, 0x22, 0xcc, 0x03,
0x11, 0x28, 0x33, 0xff, 0x33, 0x1c, 0x11, 0xff, 0x93, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustHue 3x3 360",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
360,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: srcPix,
},
},
{
"AdjustHue 3x3 540",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: srcPix,
},
540,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: pix180,
},
},
}
for _, tc := range testCases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
got := AdjustHue(tc.src, tc.p)
if !compareNRGBA(got, tc.want, 0) {
t.Fatalf("got result %#v want %#v", got, tc.want)
}
})
}
}
func TestAdjustHueGolden(t *testing.T) {
t.Parallel()
for name, p := range map[string]float64{
"out_hue_m480.png": -480,
"out_hue_m120.png": -120,
"out_hue_m60.png": -60,
"out_hue_p60.png": 60,
"out_hue_p120.png": 120,
"out_hue_p480.png": 480,
} {
got := AdjustHue(testdataFlowersSmallPNG, p)
want, err := Open("testdata/" + name)
if err != nil {
t.Fatalf("failed to open image: %v", err)
}
if !compareNRGBAGolden(got, toNRGBA(want)) {
t.Errorf("resulting image differs from golden: %s", name)
}
}
}
func BenchmarkAdjustHue(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
AdjustHue(testdataBranchesJPG, 10)
}
}
func TestAdjustContrast(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
src image.Image
p float64
want *image.NRGBA
}{
{
"AdjustContrast 3x3 10",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
10,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xd5, 0x00, 0x00, 0x01, 0x00, 0xd5, 0x00, 0x02, 0x00, 0x00, 0xd5, 0x03,
0x05, 0x18, 0x2b, 0xff, 0x2b, 0x18, 0x05, 0xff, 0xaf, 0x2b, 0xc2, 0xff,
0x00, 0x00, 0x00, 0xff, 0x2b, 0x2b, 0x2b, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustContrast 3x3 100",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
100,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xff, 0x00, 0x00, 0x01, 0x00, 0xff, 0x00, 0x02, 0x00, 0x00, 0xff, 0x03,
0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0xff, 0xff,
0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustContrast 3x3 -10",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
-10,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xc4, 0x0d, 0x0d, 0x01, 0x0d, 0xc4, 0x0d, 0x02, 0x0d, 0x0d, 0xc4, 0x03,
0x1c, 0x2b, 0x3b, 0xff, 0x3b, 0x2b, 0x1c, 0xff, 0xa6, 0x3b, 0xb5, 0xff,
0x0d, 0x0d, 0x0d, 0xff, 0x3b, 0x3b, 0x3b, 0xff, 0xf2, 0xf2, 0xf2, 0xff,
},
},
},
{
"AdjustContrast 3x3 -100",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
-100,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0x80, 0x80, 0x80, 0x01, 0x80, 0x80, 0x80, 0x02, 0x80, 0x80, 0x80, 0x03,
0x80, 0x80, 0x80, 0xff, 0x80, 0x80, 0x80, 0xff, 0x80, 0x80, 0x80, 0xff,
0x80, 0x80, 0x80, 0xff, 0x80, 0x80, 0x80, 0xff, 0x80, 0x80, 0x80, 0xff,
},
},
},
{
"AdjustContrast 3x3 0",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
0,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
}
for _, tc := range testCases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
got := AdjustContrast(tc.src, tc.p)
if !compareNRGBA(got, tc.want, 0) {
t.Fatalf("got result %#v want %#v", got, tc.want)
}
})
}
}
func TestAdjustContrastGolden(t *testing.T) {
t.Parallel()
for name, p := range map[string]float64{
"out_contrast_m15.png": -15,
"out_contrast_p15.png": 15,
} {
got := AdjustContrast(testdataFlowersSmallPNG, p)
want, err := Open("testdata/" + name)
if err != nil {
t.Fatalf("failed to open image: %v", err)
}
if !compareNRGBAGolden(got, toNRGBA(want)) {
t.Fatalf("resulting image differs from golden: %s", name)
}
}
}
func BenchmarkAdjustContrast(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
AdjustContrast(testdataBranchesJPG, 10)
}
}
func TestAdjustBrightness(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
src image.Image
p float64
want *image.NRGBA
}{
{
"AdjustBrightness 3x3 10",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
10,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xe6, 0x1a, 0x1a, 0x01, 0x1a, 0xe6, 0x1a, 0x02, 0x1a, 0x1a, 0xe6, 0x03,
0x2b, 0x3c, 0x4d, 0xff, 0x4d, 0x3c, 0x2b, 0xff, 0xc4, 0x4d, 0xd5, 0xff,
0x1a, 0x1a, 0x1a, 0xff, 0x4d, 0x4d, 0x4d, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustBrightness 3x3 100",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
100,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xff, 0xff, 0xff, 0x01, 0xff, 0xff, 0xff, 0x02, 0xff, 0xff, 0xff, 0x03,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustBrightness 3x3 -10",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
-10,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xb3, 0x00, 0x00, 0x01, 0x00, 0xb3, 0x00, 0x02, 0x00, 0x00, 0xb3, 0x03,
0x00, 0x09, 0x1a, 0xff, 0x1a, 0x09, 0x00, 0xff, 0x91, 0x1a, 0xa2, 0xff,
0x00, 0x00, 0x00, 0xff, 0x1a, 0x1a, 0x1a, 0xff, 0xe6, 0xe6, 0xe6, 0xff,
},
},
},
{
"AdjustBrightness 3x3 -100",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
-100,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff,
0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff,
},
},
},
{
"AdjustBrightness 3x3 0",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
0,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
}
for _, tc := range testCases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
got := AdjustBrightness(tc.src, tc.p)
if !compareNRGBA(got, tc.want, 0) {
t.Fatalf("got result %#v want %#v", got, tc.want)
}
})
}
}
func TestAdjustBrightnessGolden(t *testing.T) {
t.Parallel()
for name, p := range map[string]float64{
"out_brightness_m10.png": -10,
"out_brightness_p10.png": 10,
} {
got := AdjustBrightness(testdataFlowersSmallPNG, p)
want, err := Open("testdata/" + name)
if err != nil {
t.Fatalf("failed to open image: %v", err)
}
if !compareNRGBAGolden(got, toNRGBA(want)) {
t.Fatalf("resulting image differs from golden: %s", name)
}
}
}
func BenchmarkAdjustBrightness(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
AdjustBrightness(testdataBranchesJPG, 10)
}
}
func TestAdjustGamma(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
src image.Image
p float64
want *image.NRGBA
}{
{
"AdjustGamma 3x3 0.75",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
0.75,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xbd, 0x00, 0x00, 0x01, 0x00, 0xbd, 0x00, 0x02, 0x00, 0x00, 0xbd, 0x03,
0x07, 0x11, 0x1e, 0xff, 0x1e, 0x11, 0x07, 0xff, 0x95, 0x1e, 0xa9, 0xff,
0x00, 0x00, 0x00, 0xff, 0x1e, 0x1e, 0x1e, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustGamma 3x3 1.5",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
1.5,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xdc, 0x00, 0x00, 0x01, 0x00, 0xdc, 0x00, 0x02, 0x00, 0x00, 0xdc, 0x03,
0x2a, 0x43, 0x57, 0xff, 0x57, 0x43, 0x2a, 0xff, 0xc3, 0x57, 0xcf, 0xff,
0x00, 0x00, 0x00, 0xff, 0x57, 0x57, 0x57, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustGamma 3x3 1.0",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
1.0,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
}
for _, tc := range testCases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
got := AdjustGamma(tc.src, tc.p)
if !compareNRGBA(got, tc.want, 0) {
t.Fatalf("got result %#v want %#v", got, tc.want)
}
})
}
}
func TestAdjustGammaGolden(t *testing.T) {
t.Parallel()
for name, g := range map[string]float64{
"out_gamma_0.75.png": 0.75,
"out_gamma_1.25.png": 1.25,
} {
got := AdjustGamma(testdataFlowersSmallPNG, g)
want, err := Open("testdata/" + name)
if err != nil {
t.Fatalf("failed to open image: %v", err)
}
if !compareNRGBAGolden(got, toNRGBA(want)) {
t.Fatalf("resulting image differs from golden: %s", name)
}
}
}
func BenchmarkAdjustGamma(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
AdjustGamma(testdataBranchesJPG, 1.5)
}
}
func TestAdjustSigmoid(t *testing.T) {
t.Parallel()
testCases := []struct {
name string
src image.Image
m float64
p float64
want *image.NRGBA
}{
{
"AdjustSigmoid 3x3 0.5 3.0",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
0.5,
3.0,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xd4, 0x00, 0x00, 0x01, 0x00, 0xd4, 0x00, 0x02, 0x00, 0x00, 0xd4, 0x03,
0x0d, 0x1b, 0x2b, 0xff, 0x2b, 0x1b, 0x0d, 0xff, 0xb1, 0x2b, 0xc3, 0xff,
0x00, 0x00, 0x00, 0xff, 0x2b, 0x2b, 0x2b, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustSigmoid 3x3 0.5 -3.0",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
0.5,
-3.0,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xc4, 0x00, 0x00, 0x01, 0x00, 0xc4, 0x00, 0x02, 0x00, 0x00, 0xc4, 0x03,
0x16, 0x2a, 0x3b, 0xff, 0x3b, 0x2a, 0x16, 0xff, 0xa4, 0x3b, 0xb3, 0xff,
0x00, 0x00, 0x00, 0xff, 0x3b, 0x3b, 0x3b, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
},
{
"AdjustSigmoid 3x3 0.5 0.0",
&image.NRGBA{
Rect: image.Rect(-1, -1, 2, 2),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},
},
0.5,
0.0,
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 3),
Stride: 3 * 4,
Pix: []uint8{
0xcc, 0x00, 0x00, 0x01, 0x00, 0xcc, 0x00, 0x02, 0x00, 0x00, 0xcc, 0x03,
0x11, 0x22, 0x33, 0xff, 0x33, 0x22, 0x11, 0xff, 0xaa, 0x33, 0xbb, 0xff,
0x00, 0x00, 0x00, 0xff, 0x33, 0x33, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
},