Depenancy upgrades and movign to dep. (#8630)

1 files changed, 0 insertions, 742 deletions

diff --git a/vendor/golang.org/x/image/draw/scale_test.go b/vendor/golang.org/x/image/draw/scale_test.go
deleted file mode 100644
index ea41940cd..000000000
--- a/vendor/golang.org/x/image/draw/scale_test.go
+++ /dev/null
@@ -1,742 +0,0 @@
-// Copyright 2015 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package draw
-
-import (
-	"bytes"
-	"flag"
-	"fmt"
-	"image"
-	"image/color"
-	"image/png"
-	"math/rand"
-	"os"
-	"reflect"
-	"testing"
-
-	"golang.org/x/image/math/f64"
-
-	_ "image/jpeg"
-)
-
-var genGoldenFiles = flag.Bool("gen_golden_files", false, "whether to generate the TestXxx golden files.")
-
-var transformMatrix = func(scale, tx, ty float64) f64.Aff3 {
-	const cos30, sin30 = 0.866025404, 0.5
-	return f64.Aff3{
-		+scale * cos30, -scale * sin30, tx,
-		+scale * sin30, +scale * cos30, ty,
-	}
-}
-
-func encode(filename string, m image.Image) error {
-	f, err := os.Create(filename)
-	if err != nil {
-		return fmt.Errorf("Create: %v", err)
-	}
-	defer f.Close()
-	if err := png.Encode(f, m); err != nil {
-		return fmt.Errorf("Encode: %v", err)
-	}
-	return nil
-}
-
-// testInterp tests that interpolating the source image gives the exact
-// destination image. This is to ensure that any refactoring or optimization of
-// the interpolation code doesn't change the behavior. Changing the actual
-// algorithm or kernel used by any particular quality setting will obviously
-// change the resultant pixels. In such a case, use the gen_golden_files flag
-// to regenerate the golden files.
-func testInterp(t *testing.T, w int, h int, direction, prefix, suffix string) {
-	f, err := os.Open("../testdata/" + prefix + suffix)
-	if err != nil {
-		t.Fatalf("Open: %v", err)
-	}
-	defer f.Close()
-	src, _, err := image.Decode(f)
-	if err != nil {
-		t.Fatalf("Decode: %v", err)
-	}
-
-	op, scale := Src, 3.75
-	if prefix == "tux" {
-		op, scale = Over, 0.125
-	}
-	green := image.NewUniform(color.RGBA{0x00, 0x22, 0x11, 0xff})
-
-	testCases := map[string]Interpolator{
-		"nn": NearestNeighbor,
-		"ab": ApproxBiLinear,
-		"bl": BiLinear,
-		"cr": CatmullRom,
-	}
-	for name, q := range testCases {
-		goldenFilename := fmt.Sprintf("../testdata/%s-%s-%s.png", prefix, direction, name)
-
-		got := image.NewRGBA(image.Rect(0, 0, w, h))
-		Copy(got, image.Point{}, green, got.Bounds(), Src, nil)
-		if direction == "rotate" {
-			q.Transform(got, transformMatrix(scale, 40, 10), src, src.Bounds(), op, nil)
-		} else {
-			q.Scale(got, got.Bounds(), src, src.Bounds(), op, nil)
-		}
-
-		if *genGoldenFiles {
-			if err := encode(goldenFilename, got); err != nil {
-				t.Error(err)
-			}
-			continue
-		}
-
-		g, err := os.Open(goldenFilename)
-		if err != nil {
-			t.Errorf("Open: %v", err)
-			continue
-		}
-		defer g.Close()
-		wantRaw, err := png.Decode(g)
-		if err != nil {
-			t.Errorf("Decode: %v", err)
-			continue
-		}
-		// convert wantRaw to RGBA.
-		want, ok := wantRaw.(*image.RGBA)
-		if !ok {
-			b := wantRaw.Bounds()
-			want = image.NewRGBA(b)
-			Draw(want, b, wantRaw, b.Min, Src)
-		}
-
-		if !reflect.DeepEqual(got, want) {
-			t.Errorf("%s: actual image differs from golden image", goldenFilename)
-			continue
-		}
-	}
-}
-
-func TestScaleDown(t *testing.T) { testInterp(t, 100, 100, "down", "go-turns-two", "-280x360.jpeg") }
-func TestScaleUp(t *testing.T)   { testInterp(t, 75, 100, "up", "go-turns-two", "-14x18.png") }
-func TestTformSrc(t *testing.T)  { testInterp(t, 100, 100, "rotate", "go-turns-two", "-14x18.png") }
-func TestTformOver(t *testing.T) { testInterp(t, 100, 100, "rotate", "tux", ".png") }
-
-// TestSimpleTransforms tests Scale and Transform calls that simplify to Copy
-// or Scale calls.
-func TestSimpleTransforms(t *testing.T) {
-	f, err := os.Open("../testdata/testpattern.png") // A 100x100 image.
-	if err != nil {
-		t.Fatalf("Open: %v", err)
-	}
-	defer f.Close()
-	src, _, err := image.Decode(f)
-	if err != nil {
-		t.Fatalf("Decode: %v", err)
-	}
-
-	dst0 := image.NewRGBA(image.Rect(0, 0, 120, 150))
-	dst1 := image.NewRGBA(image.Rect(0, 0, 120, 150))
-	for _, op := range []string{"scale/copy", "tform/copy", "tform/scale"} {
-		for _, epsilon := range []float64{0, 1e-50, 1e-1} {
-			Copy(dst0, image.Point{}, image.Transparent, dst0.Bounds(), Src, nil)
-			Copy(dst1, image.Point{}, image.Transparent, dst1.Bounds(), Src, nil)
-
-			switch op {
-			case "scale/copy":
-				dr := image.Rect(10, 30, 10+100, 30+100)
-				if epsilon > 1e-10 {
-					dr.Max.X++
-				}
-				Copy(dst0, image.Point{10, 30}, src, src.Bounds(), Src, nil)
-				ApproxBiLinear.Scale(dst1, dr, src, src.Bounds(), Src, nil)
-			case "tform/copy":
-				Copy(dst0, image.Point{10, 30}, src, src.Bounds(), Src, nil)
-				ApproxBiLinear.Transform(dst1, f64.Aff3{
-					1, 0 + epsilon, 10,
-					0, 1, 30,
-				}, src, src.Bounds(), Src, nil)
-			case "tform/scale":
-				ApproxBiLinear.Scale(dst0, image.Rect(10, 50, 10+50, 50+50), src, src.Bounds(), Src, nil)
-				ApproxBiLinear.Transform(dst1, f64.Aff3{
-					0.5, 0.0 + epsilon, 10,
-					0.0, 0.5, 50,
-				}, src, src.Bounds(), Src, nil)
-			}
-
-			differ := !bytes.Equal(dst0.Pix, dst1.Pix)
-			if epsilon > 1e-10 {
-				if !differ {
-					t.Errorf("%s yielded same pixels, want different pixels: epsilon=%v", op, epsilon)
-				}
-			} else {
-				if differ {
-					t.Errorf("%s yielded different pixels, want same pixels: epsilon=%v", op, epsilon)
-				}
-			}
-		}
-	}
-}
-
-func BenchmarkSimpleScaleCopy(b *testing.B) {
-	dst := image.NewRGBA(image.Rect(0, 0, 640, 480))
-	src := image.NewRGBA(image.Rect(0, 0, 400, 300))
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		ApproxBiLinear.Scale(dst, image.Rect(10, 20, 10+400, 20+300), src, src.Bounds(), Src, nil)
-	}
-}
-
-func BenchmarkSimpleTransformCopy(b *testing.B) {
-	dst := image.NewRGBA(image.Rect(0, 0, 640, 480))
-	src := image.NewRGBA(image.Rect(0, 0, 400, 300))
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		ApproxBiLinear.Transform(dst, f64.Aff3{
-			1, 0, 10,
-			0, 1, 20,
-		}, src, src.Bounds(), Src, nil)
-	}
-}
-
-func BenchmarkSimpleTransformScale(b *testing.B) {
-	dst := image.NewRGBA(image.Rect(0, 0, 640, 480))
-	src := image.NewRGBA(image.Rect(0, 0, 400, 300))
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		ApproxBiLinear.Transform(dst, f64.Aff3{
-			0.5, 0.0, 10,
-			0.0, 0.5, 20,
-		}, src, src.Bounds(), Src, nil)
-	}
-}
-
-func TestOps(t *testing.T) {
-	blue := image.NewUniform(color.RGBA{0x00, 0x00, 0xff, 0xff})
-	testCases := map[Op]color.RGBA{
-		Over: color.RGBA{0x7f, 0x00, 0x80, 0xff},
-		Src:  color.RGBA{0x7f, 0x00, 0x00, 0x7f},
-	}
-	for op, want := range testCases {
-		dst := image.NewRGBA(image.Rect(0, 0, 2, 2))
-		Copy(dst, image.Point{}, blue, dst.Bounds(), Src, nil)
-
-		src := image.NewRGBA(image.Rect(0, 0, 1, 1))
-		src.SetRGBA(0, 0, color.RGBA{0x7f, 0x00, 0x00, 0x7f})
-
-		NearestNeighbor.Scale(dst, dst.Bounds(), src, src.Bounds(), op, nil)
-
-		if got := dst.RGBAAt(0, 0); got != want {
-			t.Errorf("op=%v: got %v, want %v", op, got, want)
-		}
-	}
-}
-
-// TestNegativeWeights tests that scaling by a kernel that produces negative
-// weights, such as the Catmull-Rom kernel, doesn't produce an invalid color
-// according to Go's alpha-premultiplied model.
-func TestNegativeWeights(t *testing.T) {
-	check := func(m *image.RGBA) error {
-		b := m.Bounds()
-		for y := b.Min.Y; y < b.Max.Y; y++ {
-			for x := b.Min.X; x < b.Max.X; x++ {
-				if c := m.RGBAAt(x, y); c.R > c.A || c.G > c.A || c.B > c.A {
-					return fmt.Errorf("invalid color.RGBA at (%d, %d): %v", x, y, c)
-				}
-			}
-		}
-		return nil
-	}
-
-	src := image.NewRGBA(image.Rect(0, 0, 16, 16))
-	for y := 0; y < 16; y++ {
-		for x := 0; x < 16; x++ {
-			a := y * 0x11
-			src.Set(x, y, color.RGBA{
-				R: uint8(x * 0x11 * a / 0xff),
-				A: uint8(a),
-			})
-		}
-	}
-	if err := check(src); err != nil {
-		t.Fatalf("src image: %v", err)
-	}
-
-	dst := image.NewRGBA(image.Rect(0, 0, 32, 32))
-	CatmullRom.Scale(dst, dst.Bounds(), src, src.Bounds(), Over, nil)
-	if err := check(dst); err != nil {
-		t.Fatalf("dst image: %v", err)
-	}
-}
-
-func fillPix(r *rand.Rand, pixs ...[]byte) {
-	for _, pix := range pixs {
-		for i := range pix {
-			pix[i] = uint8(r.Intn(256))
-		}
-	}
-}
-
-func TestInterpClipCommute(t *testing.T) {
-	src := image.NewNRGBA(image.Rect(0, 0, 20, 20))
-	fillPix(rand.New(rand.NewSource(0)), src.Pix)
-
-	outer := image.Rect(1, 1, 8, 5)
-	inner := image.Rect(2, 3, 6, 5)
-	qs := []Interpolator{
-		NearestNeighbor,
-		ApproxBiLinear,
-		CatmullRom,
-	}
-	for _, transform := range []bool{false, true} {
-		for _, q := range qs {
-			dst0 := image.NewRGBA(image.Rect(1, 1, 10, 10))
-			dst1 := image.NewRGBA(image.Rect(1, 1, 10, 10))
-			for i := range dst0.Pix {
-				dst0.Pix[i] = uint8(i / 4)
-				dst1.Pix[i] = uint8(i / 4)
-			}
-
-			var interp func(dst *image.RGBA)
-			if transform {
-				interp = func(dst *image.RGBA) {
-					q.Transform(dst, transformMatrix(3.75, 2, 1), src, src.Bounds(), Over, nil)
-				}
-			} else {
-				interp = func(dst *image.RGBA) {
-					q.Scale(dst, outer, src, src.Bounds(), Over, nil)
-				}
-			}
-
-			// Interpolate then clip.
-			interp(dst0)
-			dst0 = dst0.SubImage(inner).(*image.RGBA)
-
-			// Clip then interpolate.
-			dst1 = dst1.SubImage(inner).(*image.RGBA)
-			interp(dst1)
-
-		loop:
-			for y := inner.Min.Y; y < inner.Max.Y; y++ {
-				for x := inner.Min.X; x < inner.Max.X; x++ {
-					if c0, c1 := dst0.RGBAAt(x, y), dst1.RGBAAt(x, y); c0 != c1 {
-						t.Errorf("q=%T: at (%d, %d): c0=%v, c1=%v", q, x, y, c0, c1)
-						break loop
-					}
-				}
-			}
-		}
-	}
-}
-
-// translatedImage is an image m translated by t.
-type translatedImage struct {
-	m image.Image
-	t image.Point
-}
-
-func (t *translatedImage) At(x, y int) color.Color { return t.m.At(x-t.t.X, y-t.t.Y) }
-func (t *translatedImage) Bounds() image.Rectangle { return t.m.Bounds().Add(t.t) }
-func (t *translatedImage) ColorModel() color.Model { return t.m.ColorModel() }
-
-// TestSrcTranslationInvariance tests that Scale and Transform are invariant
-// under src translations. Specifically, when some source pixels are not in the
-// bottom-right quadrant of src coordinate space, we consistently round down,
-// not round towards zero.
-func TestSrcTranslationInvariance(t *testing.T) {
-	f, err := os.Open("../testdata/testpattern.png")
-	if err != nil {
-		t.Fatalf("Open: %v", err)
-	}
-	defer f.Close()
-	src, _, err := image.Decode(f)
-	if err != nil {
-		t.Fatalf("Decode: %v", err)
-	}
-	sr := image.Rect(2, 3, 16, 12)
-	if !sr.In(src.Bounds()) {
-		t.Fatalf("src bounds too small: got %v", src.Bounds())
-	}
-	qs := []Interpolator{
-		NearestNeighbor,
-		ApproxBiLinear,
-		CatmullRom,
-	}
-	deltas := []image.Point{
-		{+0, +0},
-		{+0, +5},
-		{+0, -5},
-		{+5, +0},
-		{-5, +0},
-		{+8, +8},
-		{+8, -8},
-		{-8, +8},
-		{-8, -8},
-	}
-	m00 := transformMatrix(3.75, 0, 0)
-
-	for _, transform := range []bool{false, true} {
-		for _, q := range qs {
-			want := image.NewRGBA(image.Rect(0, 0, 20, 20))
-			if transform {
-				q.Transform(want, m00, src, sr, Over, nil)
-			} else {
-				q.Scale(want, want.Bounds(), src, sr, Over, nil)
-			}
-			for _, delta := range deltas {
-				tsrc := &translatedImage{src, delta}
-				got := image.NewRGBA(image.Rect(0, 0, 20, 20))
-				if transform {
-					m := matMul(&m00, &f64.Aff3{
-						1, 0, -float64(delta.X),
-						0, 1, -float64(delta.Y),
-					})
-					q.Transform(got, m, tsrc, sr.Add(delta), Over, nil)
-				} else {
-					q.Scale(got, got.Bounds(), tsrc, sr.Add(delta), Over, nil)
-				}
-				if !bytes.Equal(got.Pix, want.Pix) {
-					t.Errorf("pix differ for delta=%v, transform=%t, q=%T", delta, transform, q)
-				}
-			}
-		}
-	}
-}
-
-func TestSrcMask(t *testing.T) {
-	srcMask := image.NewRGBA(image.Rect(0, 0, 23, 1))
-	srcMask.SetRGBA(19, 0, color.RGBA{0x00, 0x00, 0x00, 0x7f})
-	srcMask.SetRGBA(20, 0, color.RGBA{0x00, 0x00, 0x00, 0xff})
-	srcMask.SetRGBA(21, 0, color.RGBA{0x00, 0x00, 0x00, 0x3f})
-	srcMask.SetRGBA(22, 0, color.RGBA{0x00, 0x00, 0x00, 0x00})
-	red := image.NewUniform(color.RGBA{0xff, 0x00, 0x00, 0xff})
-	blue := image.NewUniform(color.RGBA{0x00, 0x00, 0xff, 0xff})
-	dst := image.NewRGBA(image.Rect(0, 0, 6, 1))
-	Copy(dst, image.Point{}, blue, dst.Bounds(), Src, nil)
-	NearestNeighbor.Scale(dst, dst.Bounds(), red, image.Rect(0, 0, 3, 1), Over, &Options{
-		SrcMask:  srcMask,
-		SrcMaskP: image.Point{20, 0},
-	})
-	got := [6]color.RGBA{
-		dst.RGBAAt(0, 0),
-		dst.RGBAAt(1, 0),
-		dst.RGBAAt(2, 0),
-		dst.RGBAAt(3, 0),
-		dst.RGBAAt(4, 0),
-		dst.RGBAAt(5, 0),
-	}
-	want := [6]color.RGBA{
-		{0xff, 0x00, 0x00, 0xff},
-		{0xff, 0x00, 0x00, 0xff},
-		{0x3f, 0x00, 0xc0, 0xff},
-		{0x3f, 0x00, 0xc0, 0xff},
-		{0x00, 0x00, 0xff, 0xff},
-		{0x00, 0x00, 0xff, 0xff},
-	}
-	if got != want {
-		t.Errorf("\ngot  %v\nwant %v", got, want)
-	}
-}
-
-func TestDstMask(t *testing.T) {
-	dstMask := image.NewRGBA(image.Rect(0, 0, 23, 1))
-	dstMask.SetRGBA(19, 0, color.RGBA{0x00, 0x00, 0x00, 0x7f})
-	dstMask.SetRGBA(20, 0, color.RGBA{0x00, 0x00, 0x00, 0xff})
-	dstMask.SetRGBA(21, 0, color.RGBA{0x00, 0x00, 0x00, 0x3f})
-	dstMask.SetRGBA(22, 0, color.RGBA{0x00, 0x00, 0x00, 0x00})
-	red := image.NewRGBA(image.Rect(0, 0, 1, 1))
-	red.SetRGBA(0, 0, color.RGBA{0xff, 0x00, 0x00, 0xff})
-	blue := image.NewUniform(color.RGBA{0x00, 0x00, 0xff, 0xff})
-	qs := []Interpolator{
-		NearestNeighbor,
-		ApproxBiLinear,
-		CatmullRom,
-	}
-	for _, q := range qs {
-		dst := image.NewRGBA(image.Rect(0, 0, 3, 1))
-		Copy(dst, image.Point{}, blue, dst.Bounds(), Src, nil)
-		q.Scale(dst, dst.Bounds(), red, red.Bounds(), Over, &Options{
-			DstMask:  dstMask,
-			DstMaskP: image.Point{20, 0},
-		})
-		got := [3]color.RGBA{
-			dst.RGBAAt(0, 0),
-			dst.RGBAAt(1, 0),
-			dst.RGBAAt(2, 0),
-		}
-		want := [3]color.RGBA{
-			{0xff, 0x00, 0x00, 0xff},
-			{0x3f, 0x00, 0xc0, 0xff},
-			{0x00, 0x00, 0xff, 0xff},
-		}
-		if got != want {
-			t.Errorf("q=%T:\ngot  %v\nwant %v", q, got, want)
-		}
-	}
-}
-
-func TestRectDstMask(t *testing.T) {
-	f, err := os.Open("../testdata/testpattern.png")
-	if err != nil {
-		t.Fatalf("Open: %v", err)
-	}
-	defer f.Close()
-	src, _, err := image.Decode(f)
-	if err != nil {
-		t.Fatalf("Decode: %v", err)
-	}
-	m00 := transformMatrix(1, 0, 0)
-
-	bounds := image.Rect(0, 0, 50, 50)
-	dstOutside := image.NewRGBA(bounds)
-	for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
-		for x := bounds.Min.X; x < bounds.Max.X; x++ {
-			dstOutside.SetRGBA(x, y, color.RGBA{uint8(5 * x), uint8(5 * y), 0x00, 0xff})
-		}
-	}
-
-	mk := func(q Transformer, dstMask image.Image, dstMaskP image.Point) *image.RGBA {
-		m := image.NewRGBA(bounds)
-		Copy(m, bounds.Min, dstOutside, bounds, Src, nil)
-		q.Transform(m, m00, src, src.Bounds(), Over, &Options{
-			DstMask:  dstMask,
-			DstMaskP: dstMaskP,
-		})
-		return m
-	}
-
-	qs := []Interpolator{
-		NearestNeighbor,
-		ApproxBiLinear,
-		CatmullRom,
-	}
-	dstMaskPs := []image.Point{
-		{0, 0},
-		{5, 7},
-		{-3, 0},
-	}
-	rect := image.Rect(10, 10, 30, 40)
-	for _, q := range qs {
-		for _, dstMaskP := range dstMaskPs {
-			dstInside := mk(q, nil, image.Point{})
-			for _, wrap := range []bool{false, true} {
-				// TODO: replace "rectImage(rect)" with "rect" once Go 1.5 is
-				// released, where an image.Rectangle implements image.Image.
-				dstMask := image.Image(rectImage(rect))
-				if wrap {
-					dstMask = srcWrapper{dstMask}
-				}
-				dst := mk(q, dstMask, dstMaskP)
-
-				nError := 0
-			loop:
-				for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
-					for x := bounds.Min.X; x < bounds.Max.X; x++ {
-						which := dstOutside
-						if (image.Point{x, y}).Add(dstMaskP).In(rect) {
-							which = dstInside
-						}
-						if got, want := dst.RGBAAt(x, y), which.RGBAAt(x, y); got != want {
-							if nError == 10 {
-								t.Errorf("q=%T dmp=%v wrap=%v: ...and more errors", q, dstMaskP, wrap)
-								break loop
-							}
-							nError++
-							t.Errorf("q=%T dmp=%v wrap=%v: x=%3d y=%3d: got %v, want %v",
-								q, dstMaskP, wrap, x, y, got, want)
-						}
-					}
-				}
-			}
-		}
-	}
-}
-
-func TestDstMaskSameSizeCopy(t *testing.T) {
-	bounds := image.Rect(0, 0, 42, 42)
-	src := image.Opaque
-	dst := image.NewRGBA(bounds)
-	mask := image.NewRGBA(bounds)
-
-	Copy(dst, image.ZP, src, bounds, Src, &Options{
-		DstMask: mask,
-	})
-}
-
-// TODO: delete this wrapper type once Go 1.5 is released, where an
-// image.Rectangle implements image.Image.
-type rectImage image.Rectangle
-
-func (r rectImage) ColorModel() color.Model { return color.Alpha16Model }
-func (r rectImage) Bounds() image.Rectangle { return image.Rectangle(r) }
-func (r rectImage) At(x, y int) color.Color {
-	if (image.Point{x, y}).In(image.Rectangle(r)) {
-		return color.Opaque
-	}
-	return color.Transparent
-}
-
-// The fooWrapper types wrap the dst or src image to avoid triggering the
-// type-specific fast path implementations.
-type (
-	dstWrapper struct{ Image }
-	srcWrapper struct{ image.Image }
-)
-
-func srcGray(boundsHint image.Rectangle) (image.Image, error) {
-	m := image.NewGray(boundsHint)
-	fillPix(rand.New(rand.NewSource(0)), m.Pix)
-	return m, nil
-}
-
-func srcNRGBA(boundsHint image.Rectangle) (image.Image, error) {
-	m := image.NewNRGBA(boundsHint)
-	fillPix(rand.New(rand.NewSource(1)), m.Pix)
-	return m, nil
-}
-
-func srcRGBA(boundsHint image.Rectangle) (image.Image, error) {
-	m := image.NewRGBA(boundsHint)
-	fillPix(rand.New(rand.NewSource(2)), m.Pix)
-	// RGBA is alpha-premultiplied, so the R, G and B values should
-	// be <= the A values.
-	for i := 0; i < len(m.Pix); i += 4 {
-		m.Pix[i+0] = uint8(uint32(m.Pix[i+0]) * uint32(m.Pix[i+3]) / 0xff)
-		m.Pix[i+1] = uint8(uint32(m.Pix[i+1]) * uint32(m.Pix[i+3]) / 0xff)
-		m.Pix[i+2] = uint8(uint32(m.Pix[i+2]) * uint32(m.Pix[i+3]) / 0xff)
-	}
-	return m, nil
-}
-
-func srcUnif(boundsHint image.Rectangle) (image.Image, error) {
-	return image.NewUniform(color.RGBA64{0x1234, 0x5555, 0x9181, 0xbeef}), nil
-}
-
-func srcYCbCr(boundsHint image.Rectangle) (image.Image, error) {
-	m := image.NewYCbCr(boundsHint, image.YCbCrSubsampleRatio420)
-	fillPix(rand.New(rand.NewSource(3)), m.Y, m.Cb, m.Cr)
-	return m, nil
-}
-
-func srcLarge(boundsHint image.Rectangle) (image.Image, error) {
-	// 3072 x 2304 is over 7 million pixels at 4:3, comparable to a
-	// 2015 smart-phone camera's output.
-	return srcYCbCr(image.Rect(0, 0, 3072, 2304))
-}
-
-func srcTux(boundsHint image.Rectangle) (image.Image, error) {
-	// tux.png is a 386 x 395 image.
-	f, err := os.Open("../testdata/tux.png")
-	if err != nil {
-		return nil, fmt.Errorf("Open: %v", err)
-	}
-	defer f.Close()
-	src, err := png.Decode(f)
-	if err != nil {
-		return nil, fmt.Errorf("Decode: %v", err)
-	}
-	return src, nil
-}
-
-func benchScale(b *testing.B, w int, h int, op Op, srcf func(image.Rectangle) (image.Image, error), q Interpolator) {
-	dst := image.NewRGBA(image.Rect(0, 0, w, h))
-	src, err := srcf(image.Rect(0, 0, 1024, 768))
-	if err != nil {
-		b.Fatal(err)
-	}
-	dr, sr := dst.Bounds(), src.Bounds()
-	scaler := Scaler(q)
-	if n, ok := q.(interface {
-		NewScaler(int, int, int, int) Scaler
-	}); ok {
-		scaler = n.NewScaler(dr.Dx(), dr.Dy(), sr.Dx(), sr.Dy())
-	}
-
-	b.ReportAllocs()
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		scaler.Scale(dst, dr, src, sr, op, nil)
-	}
-}
-
-func benchTform(b *testing.B, w int, h int, op Op, srcf func(image.Rectangle) (image.Image, error), q Interpolator) {
-	dst := image.NewRGBA(image.Rect(0, 0, w, h))
-	src, err := srcf(image.Rect(0, 0, 1024, 768))
-	if err != nil {
-		b.Fatal(err)
-	}
-	sr := src.Bounds()
-	m := transformMatrix(3.75, 40, 10)
-
-	b.ReportAllocs()
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		q.Transform(dst, m, src, sr, op, nil)
-	}
-}
-
-func BenchmarkScaleNNLargeDown(b *testing.B) { benchScale(b, 200, 150, Src, srcLarge, NearestNeighbor) }
-func BenchmarkScaleABLargeDown(b *testing.B) { benchScale(b, 200, 150, Src, srcLarge, ApproxBiLinear) }
-func BenchmarkScaleBLLargeDown(b *testing.B) { benchScale(b, 200, 150, Src, srcLarge, BiLinear) }
-func BenchmarkScaleCRLargeDown(b *testing.B) { benchScale(b, 200, 150, Src, srcLarge, CatmullRom) }
-
-func BenchmarkScaleNNDown(b *testing.B) { benchScale(b, 120, 80, Src, srcTux, NearestNeighbor) }
-func BenchmarkScaleABDown(b *testing.B) { benchScale(b, 120, 80, Src, srcTux, ApproxBiLinear) }
-func BenchmarkScaleBLDown(b *testing.B) { benchScale(b, 120, 80, Src, srcTux, BiLinear) }
-func BenchmarkScaleCRDown(b *testing.B) { benchScale(b, 120, 80, Src, srcTux, CatmullRom) }
-
-func BenchmarkScaleNNUp(b *testing.B) { benchScale(b, 800, 600, Src, srcTux, NearestNeighbor) }
-func BenchmarkScaleABUp(b *testing.B) { benchScale(b, 800, 600, Src, srcTux, ApproxBiLinear) }
-func BenchmarkScaleBLUp(b *testing.B) { benchScale(b, 800, 600, Src, srcTux, BiLinear) }
-func BenchmarkScaleCRUp(b *testing.B) { benchScale(b, 800, 600, Src, srcTux, CatmullRom) }
-
-func BenchmarkScaleNNSrcRGBA(b *testing.B) { benchScale(b, 200, 150, Src, srcRGBA, NearestNeighbor) }
-func BenchmarkScaleNNSrcUnif(b *testing.B) { benchScale(b, 200, 150, Src, srcUnif, NearestNeighbor) }
-
-func BenchmarkScaleNNOverRGBA(b *testing.B) { benchScale(b, 200, 150, Over, srcRGBA, NearestNeighbor) }
-func BenchmarkScaleNNOverUnif(b *testing.B) { benchScale(b, 200, 150, Over, srcUnif, NearestNeighbor) }
-
-func BenchmarkTformNNSrcRGBA(b *testing.B) { benchTform(b, 200, 150, Src, srcRGBA, NearestNeighbor) }
-func BenchmarkTformNNSrcUnif(b *testing.B) { benchTform(b, 200, 150, Src, srcUnif, NearestNeighbor) }
-
-func BenchmarkTformNNOverRGBA(b *testing.B) { benchTform(b, 200, 150, Over, srcRGBA, NearestNeighbor) }
-func BenchmarkTformNNOverUnif(b *testing.B) { benchTform(b, 200, 150, Over, srcUnif, NearestNeighbor) }
-
-func BenchmarkScaleABSrcGray(b *testing.B)  { benchScale(b, 200, 150, Src, srcGray, ApproxBiLinear) }
-func BenchmarkScaleABSrcNRGBA(b *testing.B) { benchScale(b, 200, 150, Src, srcNRGBA, ApproxBiLinear) }
-func BenchmarkScaleABSrcRGBA(b *testing.B)  { benchScale(b, 200, 150, Src, srcRGBA, ApproxBiLinear) }
-func BenchmarkScaleABSrcYCbCr(b *testing.B) { benchScale(b, 200, 150, Src, srcYCbCr, ApproxBiLinear) }
-
-func BenchmarkScaleABOverGray(b *testing.B)  { benchScale(b, 200, 150, Over, srcGray, ApproxBiLinear) }
-func BenchmarkScaleABOverNRGBA(b *testing.B) { benchScale(b, 200, 150, Over, srcNRGBA, ApproxBiLinear) }
-func BenchmarkScaleABOverRGBA(b *testing.B)  { benchScale(b, 200, 150, Over, srcRGBA, ApproxBiLinear) }
-func BenchmarkScaleABOverYCbCr(b *testing.B) { benchScale(b, 200, 150, Over, srcYCbCr, ApproxBiLinear) }
-
-func BenchmarkTformABSrcGray(b *testing.B)  { benchTform(b, 200, 150, Src, srcGray, ApproxBiLinear) }
-func BenchmarkTformABSrcNRGBA(b *testing.B) { benchTform(b, 200, 150, Src, srcNRGBA, ApproxBiLinear) }
-func BenchmarkTformABSrcRGBA(b *testing.B)  { benchTform(b, 200, 150, Src, srcRGBA, ApproxBiLinear) }
-func BenchmarkTformABSrcYCbCr(b *testing.B) { benchTform(b, 200, 150, Src, srcYCbCr, ApproxBiLinear) }
-
-func BenchmarkTformABOverGray(b *testing.B)  { benchTform(b, 200, 150, Over, srcGray, ApproxBiLinear) }
-func BenchmarkTformABOverNRGBA(b *testing.B) { benchTform(b, 200, 150, Over, srcNRGBA, ApproxBiLinear) }
-func BenchmarkTformABOverRGBA(b *testing.B)  { benchTform(b, 200, 150, Over, srcRGBA, ApproxBiLinear) }
-func BenchmarkTformABOverYCbCr(b *testing.B) { benchTform(b, 200, 150, Over, srcYCbCr, ApproxBiLinear) }
-
-func BenchmarkScaleCRSrcGray(b *testing.B)  { benchScale(b, 200, 150, Src, srcGray, CatmullRom) }
-func BenchmarkScaleCRSrcNRGBA(b *testing.B) { benchScale(b, 200, 150, Src, srcNRGBA, CatmullRom) }
-func BenchmarkScaleCRSrcRGBA(b *testing.B)  { benchScale(b, 200, 150, Src, srcRGBA, CatmullRom) }
-func BenchmarkScaleCRSrcYCbCr(b *testing.B) { benchScale(b, 200, 150, Src, srcYCbCr, CatmullRom) }
-
-func BenchmarkScaleCROverGray(b *testing.B)  { benchScale(b, 200, 150, Over, srcGray, CatmullRom) }
-func BenchmarkScaleCROverNRGBA(b *testing.B) { benchScale(b, 200, 150, Over, srcNRGBA, CatmullRom) }
-func BenchmarkScaleCROverRGBA(b *testing.B)  { benchScale(b, 200, 150, Over, srcRGBA, CatmullRom) }
-func BenchmarkScaleCROverYCbCr(b *testing.B) { benchScale(b, 200, 150, Over, srcYCbCr, CatmullRom) }
-
-func BenchmarkTformCRSrcGray(b *testing.B)  { benchTform(b, 200, 150, Src, srcGray, CatmullRom) }
-func BenchmarkTformCRSrcNRGBA(b *testing.B) { benchTform(b, 200, 150, Src, srcNRGBA, CatmullRom) }
-func BenchmarkTformCRSrcRGBA(b *testing.B)  { benchTform(b, 200, 150, Src, srcRGBA, CatmullRom) }
-func BenchmarkTformCRSrcYCbCr(b *testing.B) { benchTform(b, 200, 150, Src, srcYCbCr, CatmullRom) }
-
-func BenchmarkTformCROverGray(b *testing.B)  { benchTform(b, 200, 150, Over, srcGray, CatmullRom) }
-func BenchmarkTformCROverNRGBA(b *testing.B) { benchTform(b, 200, 150, Over, srcNRGBA, CatmullRom) }
-func BenchmarkTformCROverRGBA(b *testing.B)  { benchTform(b, 200, 150, Over, srcRGBA, CatmullRom) }
-func BenchmarkTformCROverYCbCr(b *testing.B) { benchTform(b, 200, 150, Over, srcYCbCr, CatmullRom) }