251 lines
5.3 KiB
Go
251 lines
5.3 KiB
Go
package imaging
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import (
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"image"
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"testing"
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)
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func TestCrop(t *testing.T) {
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td := []struct {
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desc string
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src image.Image
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r image.Rectangle
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want *image.NRGBA
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}{
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{
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"Crop 2x3 2x1",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 1, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
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0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
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0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
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},
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},
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image.Rect(-1, 0, 1, 1),
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&image.NRGBA{
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Rect: image.Rect(0, 0, 2, 1),
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Stride: 2 * 4,
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Pix: []uint8{
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0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
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},
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},
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},
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}
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for _, d := range td {
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got := Crop(d.src, d.r)
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want := d.want
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if !compareNRGBA(got, want, 0) {
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t.Errorf("test [%s] failed: %#v", d.desc, got)
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}
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}
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}
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func TestCropCenter(t *testing.T) {
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td := []struct {
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desc string
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src image.Image
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w, h int
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want *image.NRGBA
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}{
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{
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"CropCenter 2x3 2x1",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 1, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
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0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
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0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
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},
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},
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2, 1,
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&image.NRGBA{
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Rect: image.Rect(0, 0, 2, 1),
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Stride: 2 * 4,
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Pix: []uint8{
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0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
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},
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},
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},
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}
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for _, d := range td {
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got := CropCenter(d.src, d.w, d.h)
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want := d.want
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if !compareNRGBA(got, want, 0) {
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t.Errorf("test [%s] failed: %#v", d.desc, got)
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}
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}
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}
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func TestPaste(t *testing.T) {
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td := []struct {
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desc string
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src1 image.Image
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src2 image.Image
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p image.Point
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want *image.NRGBA
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}{
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{
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"Paste 2x3 2x1",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 1, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
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0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
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0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
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},
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},
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&image.NRGBA{
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Rect: image.Rect(1, 1, 3, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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},
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},
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image.Pt(-1, 0),
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&image.NRGBA{
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Rect: image.Rect(0, 0, 2, 3),
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Stride: 2 * 4,
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Pix: []uint8{
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0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
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},
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},
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},
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}
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for _, d := range td {
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got := Paste(d.src1, d.src2, d.p)
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want := d.want
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if !compareNRGBA(got, want, 0) {
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t.Errorf("test [%s] failed: %#v", d.desc, got)
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}
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}
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}
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func TestPasteCenter(t *testing.T) {
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td := []struct {
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desc string
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src1 image.Image
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src2 image.Image
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want *image.NRGBA
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}{
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{
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"PasteCenter 2x3 2x1",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 1, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
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0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
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0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
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},
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},
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&image.NRGBA{
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Rect: image.Rect(1, 1, 3, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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},
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},
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&image.NRGBA{
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Rect: image.Rect(0, 0, 2, 3),
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Stride: 2 * 4,
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Pix: []uint8{
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0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
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},
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},
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},
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}
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for _, d := range td {
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got := PasteCenter(d.src1, d.src2)
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want := d.want
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if !compareNRGBA(got, want, 0) {
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t.Errorf("test [%s] failed: %#v", d.desc, got)
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}
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}
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}
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func TestOverlay(t *testing.T) {
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td := []struct {
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desc string
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src1 image.Image
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src2 image.Image
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p image.Point
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a float64
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want *image.NRGBA
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}{
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{
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"Overlay 2x3 2x1 1.0",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 1, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
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0x60, 0x00, 0x90, 0xff, 0xff, 0x00, 0x99, 0x7f,
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0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
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},
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},
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&image.NRGBA{
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Rect: image.Rect(1, 1, 3, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0x20, 0x40, 0x80, 0x7f, 0xaa, 0xbb, 0xcc, 0xff,
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},
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},
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image.Pt(-1, 0),
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1.0,
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&image.NRGBA{
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Rect: image.Rect(0, 0, 2, 3),
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Stride: 2 * 4,
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Pix: []uint8{
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0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
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0x40, 0x1f, 0x88, 0xff, 0xaa, 0xbb, 0xcc, 0xff,
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0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
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},
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},
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},
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{
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"Overlay 2x2 2x2 0.5",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 1, 1),
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Stride: 2 * 4,
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Pix: []uint8{
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0xff, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff,
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0x00, 0x00, 0xff, 0xff, 0x20, 0x20, 0x20, 0x00,
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},
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},
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 1, 1),
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Stride: 2 * 4,
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Pix: []uint8{
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0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
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0xff, 0xff, 0x00, 0xff, 0x20, 0x20, 0x20, 0xff,
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},
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},
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image.Pt(-1, -1),
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0.5,
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&image.NRGBA{
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Rect: image.Rect(0, 0, 2, 2),
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Stride: 2 * 4,
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Pix: []uint8{
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0xff, 0x7f, 0x7f, 0xff, 0x00, 0xff, 0x00, 0xff,
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0x7f, 0x7f, 0x7f, 0xff, 0x20, 0x20, 0x20, 0x7f,
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},
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},
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},
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}
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for _, d := range td {
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got := Overlay(d.src1, d.src2, d.p, d.a)
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want := d.want
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if !compareNRGBA(got, want, 1) {
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t.Errorf("test [%s] failed: %#v", d.desc, got)
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}
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}
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}
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