diff options
Diffstat (limited to 'vendor/github.com/disintegration/imaging/helpers_test.go')
-rw-r--r-- | vendor/github.com/disintegration/imaging/helpers_test.go | 399 |
1 files changed, 399 insertions, 0 deletions
diff --git a/vendor/github.com/disintegration/imaging/helpers_test.go b/vendor/github.com/disintegration/imaging/helpers_test.go new file mode 100644 index 000000000..1287ec588 --- /dev/null +++ b/vendor/github.com/disintegration/imaging/helpers_test.go @@ -0,0 +1,399 @@ +package imaging + +import ( + "bytes" + "image" + "image/color" + "testing" +) + +func compareNRGBA(img1, img2 *image.NRGBA, delta int) bool { + if !img1.Rect.Eq(img2.Rect) { + return false + } + + if len(img1.Pix) != len(img2.Pix) { + return false + } + + for i := 0; i < len(img1.Pix); i++ { + if absint(int(img1.Pix[i])-int(img2.Pix[i])) > delta { + return false + } + } + + return true +} + +func TestEncodeDecode(t *testing.T) { + imgWithAlpha := image.NewNRGBA(image.Rect(0, 0, 3, 3)) + imgWithAlpha.Pix = []uint8{ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, + 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, + 244, 245, 246, 247, 248, 249, 250, 252, 252, 253, 254, 255, + } + + imgWithoutAlpha := image.NewNRGBA(image.Rect(0, 0, 3, 3)) + imgWithoutAlpha.Pix = []uint8{ + 0, 1, 2, 255, 4, 5, 6, 255, 8, 9, 10, 255, + 127, 128, 129, 255, 131, 132, 133, 255, 135, 136, 137, 255, + 244, 245, 246, 255, 248, 249, 250, 255, 252, 253, 254, 255, + } + + for _, format := range []Format{JPEG, PNG, GIF, BMP, TIFF} { + img := imgWithoutAlpha + if format == PNG { + img = imgWithAlpha + } + + buf := &bytes.Buffer{} + err := Encode(buf, img, format) + if err != nil { + t.Errorf("fail encoding format %s", format) + continue + } + + img2, err := Decode(buf) + if err != nil { + t.Errorf("fail decoding format %s", format) + continue + } + img2cloned := Clone(img2) + + delta := 0 + if format == JPEG { + delta = 3 + } else if format == GIF { + delta = 16 + } + + if !compareNRGBA(img, img2cloned, delta) { + t.Errorf("test [DecodeEncode %s] failed: %#v %#v", format, img, img2cloned) + continue + } + } + + buf := &bytes.Buffer{} + err := Encode(buf, imgWithAlpha, JPEG) + if err != nil { + t.Errorf("failed encoding alpha to JPEG format %s", err) + } + + buf = &bytes.Buffer{} + err = Encode(buf, imgWithAlpha, Format(100)) + if err != ErrUnsupportedFormat { + t.Errorf("expected ErrUnsupportedFormat") + } + + buf = bytes.NewBuffer([]byte("bad data")) + _, err = Decode(buf) + if err == nil { + t.Errorf("decoding bad data, expected error") + } +} + +func TestNew(t *testing.T) { + td := []struct { + desc string + w, h int + c color.Color + dstBounds image.Rectangle + dstPix []uint8 + }{ + { + "New 1x1 black", + 1, 1, + color.NRGBA{0, 0, 0, 0}, + image.Rect(0, 0, 1, 1), + []uint8{0x00, 0x00, 0x00, 0x00}, + }, + { + "New 1x2 red", + 1, 2, + color.NRGBA{255, 0, 0, 255}, + image.Rect(0, 0, 1, 2), + []uint8{0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff}, + }, + { + "New 2x1 white", + 2, 1, + color.NRGBA{255, 255, 255, 255}, + image.Rect(0, 0, 2, 1), + []uint8{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, + }, + { + "New 0x0 white", + 0, 0, + color.NRGBA{255, 255, 255, 255}, + image.Rect(0, 0, 0, 0), + nil, + }, + } + + for _, d := range td { + got := New(d.w, d.h, d.c) + want := image.NewNRGBA(d.dstBounds) + want.Pix = d.dstPix + if !compareNRGBA(got, want, 0) { + t.Errorf("test [%s] failed: %#v", d.desc, got) + } + } +} + +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) + } + } +} + +func TestFormats(t *testing.T) { + formatNames := map[Format]string{ + JPEG: "JPEG", + PNG: "PNG", + GIF: "GIF", + BMP: "BMP", + TIFF: "TIFF", + Format(-1): "Unsupported", + } + for format, name := range formatNames { + got := format.String() + if got != name { + t.Errorf("test [Format names] failed: got %#v want %#v", got, name) + continue + } + } +} |