transform tests

transform_test.go

@@ -0,0 +1,189 @@
+package imaging
+
+import (
+	"image"
+	"testing"
+)
+
+func TestRotate90(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Rotate90 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0xcc, 0xdd, 0xee, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff,
+					0x00, 0x11, 0x22, 0x33, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Rotate90(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestRotate180(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Rotate180 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00,
+					0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00,
+					0xcc, 0xdd, 0xee, 0xff, 0x00, 0x11, 0x22, 0x33,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Rotate180(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestRotate270(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"Rotate270 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 3, 2),
+				Stride: 3 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x11, 0x22, 0x33,
+					0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xcc, 0xdd, 0xee, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := Rotate270(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestFlipV(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"FlipV 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := FlipV(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}
+
+func TestFlipH(t *testing.T) {
+	td := []struct {
+		desc string
+		src  image.Image
+		want *image.NRGBA
+	}{
+		{
+			"FlipH 2x3",
+			&image.NRGBA{
+				Rect:   image.Rect(-1, -1, 1, 2),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
+					0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
+					0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
+				},
+			},
+			&image.NRGBA{
+				Rect:   image.Rect(0, 0, 2, 3),
+				Stride: 2 * 4,
+				Pix: []uint8{
+					0xcc, 0xdd, 0xee, 0xff, 0x00, 0x11, 0x22, 0x33,
+					0x00, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00,
+					0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0xff, 0x00,
+				},
+			},
+		},
+	}
+	for _, d := range td {
+		got := FlipH(d.src)
+		want := d.want
+		if !compareNRGBA(got, want, 0) {
+			t.Errorf("test [%s] failed: %#v", d.desc, got)
+		}
+	}
+}