imaging/clone_test.go

package imaging

import (
	"image"
	"image/color"
	"testing"
)

func TestClone(t *testing.T) {
	td := []struct {
		desc string
		src  image.Image
		want *image.NRGBA
	}{
		{
			"Clone NRGBA",
			&image.NRGBA{
				Rect:   image.Rect(-1, -1, 0, 1),
				Stride: 1 * 4,
				Pix:    []uint8{0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 1, 2),
				Stride: 1 * 4,
				Pix:    []uint8{0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff},
			},
		},
		{
			"Clone NRGBA64",
			&image.NRGBA64{
				Rect:   image.Rect(-1, -1, 0, 1),
				Stride: 1 * 8,
				Pix: []uint8{
					0x00, 0x00, 0x11, 0x11, 0x22, 0x22, 0x33, 0x33,
					0xcc, 0xcc, 0xdd, 0xdd, 0xee, 0xee, 0xff, 0xff,
				},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 1, 2),
				Stride: 1 * 4,
				Pix:    []uint8{0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff},
			},
		},
		{
			"Clone RGBA",
			&image.RGBA{
				Rect:   image.Rect(-1, -1, 0, 2),
				Stride: 1 * 4,
				Pix:    []uint8{0x00, 0x00, 0x00, 0x00, 0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 1, 3),
				Stride: 1 * 4,
				Pix:    []uint8{0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa, 0x33, 0xcc, 0xdd, 0xee, 0xff},
			},
		},
		{
			"Clone RGBA64",
			&image.RGBA64{
				Rect:   image.Rect(-1, -1, 0, 2),
				Stride: 1 * 8,
				Pix: []uint8{
					0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
					0x00, 0x00, 0x11, 0x11, 0x22, 0x22, 0x33, 0x33,
					0xcc, 0xcc, 0xdd, 0xdd, 0xee, 0xee, 0xff, 0xff,
				},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 1, 3),
				Stride: 1 * 4,
				Pix:    []uint8{0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa, 0x33, 0xcc, 0xdd, 0xee, 0xff},
			},
		},
		{
			"Clone Gray",
			&image.Gray{
				Rect:   image.Rect(-1, -1, 0, 1),
				Stride: 1 * 1,
				Pix:    []uint8{0x11, 0xee},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 1, 2),
				Stride: 1 * 4,
				Pix:    []uint8{0x11, 0x11, 0x11, 0xff, 0xee, 0xee, 0xee, 0xff},
			},
		},
		{
			"Clone Gray16",
			&image.Gray16{
				Rect:   image.Rect(-1, -1, 0, 1),
				Stride: 1 * 2,
				Pix:    []uint8{0x11, 0x11, 0xee, 0xee},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 1, 2),
				Stride: 1 * 4,
				Pix:    []uint8{0x11, 0x11, 0x11, 0xff, 0xee, 0xee, 0xee, 0xff},
			},
		},
		{
			"Clone Alpha",
			&image.Alpha{
				Rect:   image.Rect(-1, -1, 0, 1),
				Stride: 1 * 1,
				Pix:    []uint8{0x11, 0xee},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 1, 2),
				Stride: 1 * 4,
				Pix:    []uint8{0xff, 0xff, 0xff, 0x11, 0xff, 0xff, 0xff, 0xee},
			},
		},
		{
			"Clone YCbCr",
			&image.YCbCr{
				Rect:           image.Rect(-1, -1, 5, 0),
				SubsampleRatio: image.YCbCrSubsampleRatio444,
				YStride:        6,
				CStride:        6,
				Y:              []uint8{0x00, 0xff, 0x7f, 0x26, 0x4b, 0x0e},
				Cb:             []uint8{0x80, 0x80, 0x80, 0x6b, 0x56, 0xc0},
				Cr:             []uint8{0x80, 0x80, 0x80, 0xc0, 0x4b, 0x76},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 6, 1),
				Stride: 6 * 4,
				Pix: []uint8{
					0x00, 0x00, 0x00, 0xff,
					0xff, 0xff, 0xff, 0xff,
					0x7f, 0x7f, 0x7f, 0xff,
					0x7f, 0x00, 0x00, 0xff,
					0x00, 0x7f, 0x00, 0xff,
					0x00, 0x00, 0x7f, 0xff,
				},
			},
		},
		{
			"Clone YCbCr 444",
			&image.YCbCr{
				Y:              []uint8{0x4c, 0x69, 0x1d, 0xb1, 0x96, 0xe2, 0x26, 0x34, 0xe, 0x59, 0x4b, 0x71, 0x0, 0x4c, 0x99, 0xff},
				Cb:             []uint8{0x55, 0xd4, 0xff, 0x8e, 0x2c, 0x01, 0x6b, 0xaa, 0xc0, 0x95, 0x56, 0x40, 0x80, 0x80, 0x80, 0x80},
				Cr:             []uint8{0xff, 0xeb, 0x6b, 0x36, 0x15, 0x95, 0xc0, 0xb5, 0x76, 0x41, 0x4b, 0x8c, 0x80, 0x80, 0x80, 0x80},
				YStride:        4,
				CStride:        4,
				SubsampleRatio: image.YCbCrSubsampleRatio444,
				Rect:           image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
			},
			&image.NRGBA{
				Pix:    []uint8{0xff, 0x0, 0x0, 0xff, 0xff, 0x0, 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x49, 0xe1, 0xca, 0xff, 0x0, 0xff, 0x0, 0xff, 0xff, 0xff, 0x0, 0xff, 0x7f, 0x0, 0x0, 0xff, 0x7f, 0x0, 0x7f, 0xff, 0x0, 0x0, 0x7f, 0xff, 0x0, 0x7f, 0x7f, 0xff, 0x0, 0x7f, 0x0, 0xff, 0x82, 0x7f, 0x0, 0xff, 0x0, 0x0, 0x0, 0xff, 0x4c, 0x4c, 0x4c, 0xff, 0x99, 0x99, 0x99, 0xff, 0xff, 0xff, 0xff, 0xff},
				Stride: 16,
				Rect:   image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
			},
		},
		{
			"Clone YCbCr 440",
			&image.YCbCr{
				Y:              []uint8{0x4c, 0x69, 0x1d, 0xb1, 0x96, 0xe2, 0x26, 0x34, 0xe, 0x59, 0x4b, 0x71, 0x0, 0x4c, 0x99, 0xff},
				Cb:             []uint8{0x2c, 0x01, 0x6b, 0xaa, 0x80, 0x80, 0x80, 0x80},
				Cr:             []uint8{0x15, 0x95, 0xc0, 0xb5, 0x80, 0x80, 0x80, 0x80},
				YStride:        4,
				CStride:        4,
				SubsampleRatio: image.YCbCrSubsampleRatio440,
				Rect:           image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
			},
			&image.NRGBA{
				Pix:    []uint8{0x0, 0xb5, 0x0, 0xff, 0x86, 0x86, 0x0, 0xff, 0x77, 0x0, 0x0, 0xff, 0xfb, 0x7d, 0xfb, 0xff, 0x0, 0xff, 0x1, 0xff, 0xff, 0xff, 0x1, 0xff, 0x80, 0x0, 0x1, 0xff, 0x7e, 0x0, 0x7e, 0xff, 0xe, 0xe, 0xe, 0xff, 0x59, 0x59, 0x59, 0xff, 0x4b, 0x4b, 0x4b, 0xff, 0x71, 0x71, 0x71, 0xff, 0x0, 0x0, 0x0, 0xff, 0x4c, 0x4c, 0x4c, 0xff, 0x99, 0x99, 0x99, 0xff, 0xff, 0xff, 0xff, 0xff},
				Stride: 16,
				Rect:   image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
			},
		},
		{
			"Clone YCbCr 422",
			&image.YCbCr{
				Y:              []uint8{0x4c, 0x69, 0x1d, 0xb1, 0x96, 0xe2, 0x26, 0x34, 0xe, 0x59, 0x4b, 0x71, 0x0, 0x4c, 0x99, 0xff},
				Cb:             []uint8{0xd4, 0x8e, 0x01, 0xaa, 0x95, 0x40, 0x80, 0x80},
				Cr:             []uint8{0xeb, 0x36, 0x95, 0xb5, 0x41, 0x8c, 0x80, 0x80},
				YStride:        4,
				CStride:        2,
				SubsampleRatio: image.YCbCrSubsampleRatio422,
				Rect:           image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
			},
			&image.NRGBA{
				Pix:    []uint8{0xe2, 0x0, 0xe1, 0xff, 0xff, 0x0, 0xfe, 0xff, 0x0, 0x4d, 0x36, 0xff, 0x49, 0xe1, 0xca, 0xff, 0xb3, 0xb3, 0x0, 0xff, 0xff, 0xff, 0x1, 0xff, 0x70, 0x0, 0x70, 0xff, 0x7e, 0x0, 0x7e, 0xff, 0x0, 0x34, 0x33, 0xff, 0x1, 0x7f, 0x7e, 0xff, 0x5c, 0x58, 0x0, 0xff, 0x82, 0x7e, 0x0, 0xff, 0x0, 0x0, 0x0, 0xff, 0x4c, 0x4c, 0x4c, 0xff, 0x99, 0x99, 0x99, 0xff, 0xff, 0xff, 0xff, 0xff},
				Stride: 16,
				Rect:   image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
			},
		},
		{
			"Clone YCbCr 420",
			&image.YCbCr{
				Y:       []uint8{0x4c, 0x69, 0x1d, 0xb1, 0x96, 0xe2, 0x26, 0x34, 0xe, 0x59, 0x4b, 0x71, 0x0, 0x4c, 0x99, 0xff},
				Cb:      []uint8{0x01, 0xaa, 0x80, 0x80},
				Cr:      []uint8{0x95, 0xb5, 0x80, 0x80},
				YStride: 4, CStride: 2,
				SubsampleRatio: image.YCbCrSubsampleRatio420,
				Rect:           image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
			},
			&image.NRGBA{
				Pix:    []uint8{0x69, 0x69, 0x0, 0xff, 0x86, 0x86, 0x0, 0xff, 0x67, 0x0, 0x67, 0xff, 0xfb, 0x7d, 0xfb, 0xff, 0xb3, 0xb3, 0x0, 0xff, 0xff, 0xff, 0x1, 0xff, 0x70, 0x0, 0x70, 0xff, 0x7e, 0x0, 0x7e, 0xff, 0xe, 0xe, 0xe, 0xff, 0x59, 0x59, 0x59, 0xff, 0x4b, 0x4b, 0x4b, 0xff, 0x71, 0x71, 0x71, 0xff, 0x0, 0x0, 0x0, 0xff, 0x4c, 0x4c, 0x4c, 0xff, 0x99, 0x99, 0x99, 0xff, 0xff, 0xff, 0xff, 0xff},
				Stride: 16,
				Rect:   image.Rectangle{Min: image.Point{X: 0, Y: 0}, Max: image.Point{X: 4, Y: 4}},
			},
		},
		{
			"Clone Paletted",
			&image.Paletted{
				Rect:   image.Rect(-1, -1, 5, 0),
				Stride: 6 * 1,
				Palette: color.Palette{
					color.NRGBA{R: 0x00, G: 0x00, B: 0x00, A: 0xff},
					color.NRGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff},
					color.NRGBA{R: 0x7f, G: 0x7f, B: 0x7f, A: 0xff},
					color.NRGBA{R: 0x7f, G: 0x00, B: 0x00, A: 0xff},
					color.NRGBA{R: 0x00, G: 0x7f, B: 0x00, A: 0xff},
					color.NRGBA{R: 0x00, G: 0x00, B: 0x7f, A: 0xff},
				},
				Pix: []uint8{0x0, 0x1, 0x2, 0x3, 0x4, 0x5},
			},
			&image.NRGBA{
				Rect:   image.Rect(0, 0, 6, 1),
				Stride: 6 * 4,
				Pix: []uint8{
					0x00, 0x00, 0x00, 0xff,
					0xff, 0xff, 0xff, 0xff,
					0x7f, 0x7f, 0x7f, 0xff,
					0x7f, 0x00, 0x00, 0xff,
					0x00, 0x7f, 0x00, 0xff,
					0x00, 0x00, 0x7f, 0xff,
				},
			},
		},
	}

	for _, d := range td {
		got := Clone(d.src)
		want := d.want

		delta := 0
		if _, ok := d.src.(*image.YCbCr); ok {
			delta = 1
		}

		if !compareNRGBA(got, want, delta) {
			t.Errorf("test [%s] failed: %#v", d.desc, got)
		}
	}
}