Fix Avatar Resize (resize algo NearestNeighbor -> Bilinear) (#12745) (#12750)

* Update Vendor github.com/nfnt/resize

* switch resize algo NearestNeighbor -> Bilinear

go.mod

@@ -75,7 +75,7 @@ require (
 	github.com/microcosm-cc/bluemonday v1.0.3-0.20191119130333-0a75d7616912
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/msteinert/pam v0.0.0-20151204160544-02ccfbfaf0cc
-	github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
 	github.com/niklasfasching/go-org v0.1.9
 	github.com/oliamb/cutter v0.2.2
 	github.com/olivere/elastic/v7 v7.0.9

go.sum

@@ -483,8 +483,8 @@ github.com/mschoch/smat v0.2.0/go.mod h1:kc9mz7DoBKqDyiRL7VZN8KvXQMWeTaVnttLRXOl
 github.com/msteinert/pam v0.0.0-20151204160544-02ccfbfaf0cc h1:z1PgdCCmYYVL0BoJTUgmAq1p7ca8fzYIPsNyfsN3xAU=
 github.com/msteinert/pam v0.0.0-20151204160544-02ccfbfaf0cc/go.mod h1:np1wUFZ6tyoke22qDJZY40URn9Ae51gX7ljIWXN5TJs=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
-github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5 h1:BvoENQQU+fZ9uukda/RzCAL/191HHwJA5b13R6diVlY=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
-github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/niklasfasching/go-org v0.1.9 h1:Toz8WMIt+qJb52uYEk1YD/muLuOOmRt1CfkV+bKVMkI=

modules/avatar/avatar.go

@@ -89,6 +89,6 @@ func Prepare(data []byte) (*image.Image, error) {
 		}
 	}
 
-	img = resize.Resize(AvatarSize, AvatarSize, img, resize.NearestNeighbor)
+	img = resize.Resize(AvatarSize, AvatarSize, img, resize.Bilinear)
 	return &img, nil
 }

vendor/github.com/nfnt/resize/.travis.yml

@@ -1,7 +1,7 @@
 language: go
 
 go:
-  - 1.1
+  - "1.x"
-  - 1.2
+  - "1.1"
-  - 1.3
+  - "1.4"
-  - tip
+  - "1.10"

vendor/github.com/nfnt/resize/README.md

@@ -1,3 +1,5 @@
+# This package is no longer being updated! Please look for alternatives if that bothers you.
+
 Resize
 ======
 

vendor/github.com/nfnt/resize/resize.go

@@ -78,6 +78,7 @@ var blur = 1.0
 // If one of the parameters width or height is set to 0, its size will be calculated so that
 // the aspect ratio is that of the originating image.
 // The resizing algorithm uses channels for parallel computation.
+// If the input image has width or height of 0, it is returned unchanged.
 func Resize(width, height uint, img image.Image, interp InterpolationFunction) image.Image {
 	scaleX, scaleY := calcFactors(width, height, float64(img.Bounds().Dx()), float64(img.Bounds().Dy()))
 	if width == 0 {
@@ -92,6 +93,11 @@ func Resize(width, height uint, img image.Image, interp InterpolationFunction) i
 		return img
 	}
 
+	// Input image has no pixels
+	if img.Bounds().Dx() <= 0 || img.Bounds().Dy() <= 0 {
+		return img
+	}
+
 	if interp == NearestNeighbor {
 		return resizeNearest(width, height, scaleX, scaleY, img, interp)
 	}

vendor/github.com/nfnt/resize/ycc.go

@@ -88,140 +88,300 @@ func newYCC(r image.Rectangle, s image.YCbCrSubsampleRatio) *ycc {
 	return &ycc{Pix: buf, Stride: 3 * w, Rect: r, SubsampleRatio: s}
 }
 
+// Copy of image.YCbCrSubsampleRatio constants - this allows us to support
+// older versions of Go where these constants are not defined (i.e. Go 1.4)
+const (
+	ycbcrSubsampleRatio444 image.YCbCrSubsampleRatio = iota
+	ycbcrSubsampleRatio422
+	ycbcrSubsampleRatio420
+	ycbcrSubsampleRatio440
+	ycbcrSubsampleRatio411
+	ycbcrSubsampleRatio410
+)
+
 // YCbCr converts ycc to a YCbCr image with the same subsample ratio
 // as the YCbCr image that ycc was generated from.
 func (p *ycc) YCbCr() *image.YCbCr {
 	ycbcr := image.NewYCbCr(p.Rect, p.SubsampleRatio)
+	switch ycbcr.SubsampleRatio {
+	case ycbcrSubsampleRatio422:
+		return p.ycbcr422(ycbcr)
+	case ycbcrSubsampleRatio420:
+		return p.ycbcr420(ycbcr)
+	case ycbcrSubsampleRatio440:
+		return p.ycbcr440(ycbcr)
+	case ycbcrSubsampleRatio444:
+		return p.ycbcr444(ycbcr)
+	case ycbcrSubsampleRatio411:
+		return p.ycbcr411(ycbcr)
+	case ycbcrSubsampleRatio410:
+		return p.ycbcr410(ycbcr)
+	}
+	return ycbcr
+}
+
+// imageYCbCrToYCC converts a YCbCr image to a ycc image for resizing.
+func imageYCbCrToYCC(in *image.YCbCr) *ycc {
+	w, h := in.Rect.Dx(), in.Rect.Dy()
+	p := ycc{
+		Pix:            make([]uint8, 3*w*h),
+		Stride:         3 * w,
+		Rect:           image.Rect(0, 0, w, h),
+		SubsampleRatio: in.SubsampleRatio,
+	}
+	switch in.SubsampleRatio {
+	case ycbcrSubsampleRatio422:
+		return convertToYCC422(in, &p)
+	case ycbcrSubsampleRatio420:
+		return convertToYCC420(in, &p)
+	case ycbcrSubsampleRatio440:
+		return convertToYCC440(in, &p)
+	case ycbcrSubsampleRatio444:
+		return convertToYCC444(in, &p)
+	case ycbcrSubsampleRatio411:
+		return convertToYCC411(in, &p)
+	case ycbcrSubsampleRatio410:
+		return convertToYCC410(in, &p)
+	}
+	return &p
+}
+
+func (p *ycc) ycbcr422(ycbcr *image.YCbCr) *image.YCbCr {
 	var off int
+	Pix := p.Pix
+	Y := ycbcr.Y
+	Cb := ycbcr.Cb
+	Cr := ycbcr.Cr
+	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
+		yy := y * ycbcr.YStride
+		cy := y * ycbcr.CStride
+		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
+			ci := cy + x/2
+			Y[yy+x] = Pix[off+0]
+			Cb[ci] = Pix[off+1]
+			Cr[ci] = Pix[off+2]
+			off += 3
+		}
+	}
+	return ycbcr
+}
 
-	switch ycbcr.SubsampleRatio {
+func (p *ycc) ycbcr420(ycbcr *image.YCbCr) *image.YCbCr {
-	case image.YCbCrSubsampleRatio422:
+	var off int
-		for y := ycbcr.Rect.Min.Y; y < ycbcr.Rect.Max.Y; y++ {
+	Pix := p.Pix
-			yy := (y - ycbcr.Rect.Min.Y) * ycbcr.YStride
+	Y := ycbcr.Y
-			cy := (y - ycbcr.Rect.Min.Y) * ycbcr.CStride
+	Cb := ycbcr.Cb
-			for x := ycbcr.Rect.Min.X; x < ycbcr.Rect.Max.X; x++ {
+	Cr := ycbcr.Cr
-				xx := (x - ycbcr.Rect.Min.X)
+	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-				yi := yy + xx
+		yy := y * ycbcr.YStride
-				ci := cy + xx/2
+		cy := (y / 2) * ycbcr.CStride
-				ycbcr.Y[yi] = p.Pix[off+0]
+		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
-				ycbcr.Cb[ci] = p.Pix[off+1]
+			ci := cy + x/2
-				ycbcr.Cr[ci] = p.Pix[off+2]
+			Y[yy+x] = Pix[off+0]
-				off += 3
+			Cb[ci] = Pix[off+1]
-			}
+			Cr[ci] = Pix[off+2]
+			off += 3
 		}
-	case image.YCbCrSubsampleRatio420:
+	}
-		for y := ycbcr.Rect.Min.Y; y < ycbcr.Rect.Max.Y; y++ {
+	return ycbcr
-			yy := (y - ycbcr.Rect.Min.Y) * ycbcr.YStride
+}
-			cy := (y/2 - ycbcr.Rect.Min.Y/2) * ycbcr.CStride
+
-			for x := ycbcr.Rect.Min.X; x < ycbcr.Rect.Max.X; x++ {
+func (p *ycc) ycbcr440(ycbcr *image.YCbCr) *image.YCbCr {
-				xx := (x - ycbcr.Rect.Min.X)
+	var off int
-				yi := yy + xx
+	Pix := p.Pix
-				ci := cy + xx/2
+	Y := ycbcr.Y
-				ycbcr.Y[yi] = p.Pix[off+0]
+	Cb := ycbcr.Cb
-				ycbcr.Cb[ci] = p.Pix[off+1]
+	Cr := ycbcr.Cr
-				ycbcr.Cr[ci] = p.Pix[off+2]
+	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-				off += 3
+		yy := y * ycbcr.YStride
-			}
+		cy := (y / 2) * ycbcr.CStride
+		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
+			ci := cy + x
+			Y[yy+x] = Pix[off+0]
+			Cb[ci] = Pix[off+1]
+			Cr[ci] = Pix[off+2]
+			off += 3
 		}
-	case image.YCbCrSubsampleRatio440:
+	}
-		for y := ycbcr.Rect.Min.Y; y < ycbcr.Rect.Max.Y; y++ {
+	return ycbcr
-			yy := (y - ycbcr.Rect.Min.Y) * ycbcr.YStride
+}
-			cy := (y/2 - ycbcr.Rect.Min.Y/2) * ycbcr.CStride
+
-			for x := ycbcr.Rect.Min.X; x < ycbcr.Rect.Max.X; x++ {
+func (p *ycc) ycbcr444(ycbcr *image.YCbCr) *image.YCbCr {
-				xx := (x - ycbcr.Rect.Min.X)
+	var off int
-				yi := yy + xx
+	Pix := p.Pix
-				ci := cy + xx
+	Y := ycbcr.Y
-				ycbcr.Y[yi] = p.Pix[off+0]
+	Cb := ycbcr.Cb
-				ycbcr.Cb[ci] = p.Pix[off+1]
+	Cr := ycbcr.Cr
-				ycbcr.Cr[ci] = p.Pix[off+2]
+	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-				off += 3
+		yy := y * ycbcr.YStride
-			}
+		cy := y * ycbcr.CStride
+		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
+			ci := cy + x
+			Y[yy+x] = Pix[off+0]
+			Cb[ci] = Pix[off+1]
+			Cr[ci] = Pix[off+2]
+			off += 3
+		}
+	}
+	return ycbcr
+}
+
+func (p *ycc) ycbcr411(ycbcr *image.YCbCr) *image.YCbCr {
+	var off int
+	Pix := p.Pix
+	Y := ycbcr.Y
+	Cb := ycbcr.Cb
+	Cr := ycbcr.Cr
+	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
+		yy := y * ycbcr.YStride
+		cy := y * ycbcr.CStride
+		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
+			ci := cy + x/4
+			Y[yy+x] = Pix[off+0]
+			Cb[ci] = Pix[off+1]
+			Cr[ci] = Pix[off+2]
+			off += 3
 		}
-	default:
+	}
-		// Default to 4:4:4 subsampling.
+	return ycbcr
-		for y := ycbcr.Rect.Min.Y; y < ycbcr.Rect.Max.Y; y++ {
+}
-			yy := (y - ycbcr.Rect.Min.Y) * ycbcr.YStride
+
-			cy := (y - ycbcr.Rect.Min.Y) * ycbcr.CStride
+func (p *ycc) ycbcr410(ycbcr *image.YCbCr) *image.YCbCr {
-			for x := ycbcr.Rect.Min.X; x < ycbcr.Rect.Max.X; x++ {
+	var off int
-				xx := (x - ycbcr.Rect.Min.X)
+	Pix := p.Pix
-				yi := yy + xx
+	Y := ycbcr.Y
-				ci := cy + xx
+	Cb := ycbcr.Cb
-				ycbcr.Y[yi] = p.Pix[off+0]
+	Cr := ycbcr.Cr
-				ycbcr.Cb[ci] = p.Pix[off+1]
+	for y := 0; y < ycbcr.Rect.Max.Y-ycbcr.Rect.Min.Y; y++ {
-				ycbcr.Cr[ci] = p.Pix[off+2]
+		yy := y * ycbcr.YStride
-				off += 3
+		cy := (y / 2) * ycbcr.CStride
-			}
+		for x := 0; x < ycbcr.Rect.Max.X-ycbcr.Rect.Min.X; x++ {
+			ci := cy + x/4
+			Y[yy+x] = Pix[off+0]
+			Cb[ci] = Pix[off+1]
+			Cr[ci] = Pix[off+2]
+			off += 3
 		}
 	}
 	return ycbcr
 }
 
-// imageYCbCrToYCC converts a YCbCr image to a ycc image for resizing.
+func convertToYCC422(in *image.YCbCr, p *ycc) *ycc {
-func imageYCbCrToYCC(in *image.YCbCr) *ycc {
-	w, h := in.Rect.Dx(), in.Rect.Dy()
-	r := image.Rect(0, 0, w, h)
-	buf := make([]uint8, 3*w*h)
-	p := ycc{Pix: buf, Stride: 3 * w, Rect: r, SubsampleRatio: in.SubsampleRatio}
 	var off int
+	Pix := p.Pix
+	Y := in.Y
+	Cb := in.Cb
+	Cr := in.Cr
+	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
+		yy := y * in.YStride
+		cy := y * in.CStride
+		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
+			ci := cy + x/2
+			Pix[off+0] = Y[yy+x]
+			Pix[off+1] = Cb[ci]
+			Pix[off+2] = Cr[ci]
+			off += 3
+		}
+	}
+	return p
+}
 
-	switch in.SubsampleRatio {
+func convertToYCC420(in *image.YCbCr, p *ycc) *ycc {
-	case image.YCbCrSubsampleRatio422:
+	var off int
-		for y := in.Rect.Min.Y; y < in.Rect.Max.Y; y++ {
+	Pix := p.Pix
-			yy := (y - in.Rect.Min.Y) * in.YStride
+	Y := in.Y
-			cy := (y - in.Rect.Min.Y) * in.CStride
+	Cb := in.Cb
-			for x := in.Rect.Min.X; x < in.Rect.Max.X; x++ {
+	Cr := in.Cr
-				xx := (x - in.Rect.Min.X)
+	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-				yi := yy + xx
+		yy := y * in.YStride
-				ci := cy + xx/2
+		cy := (y / 2) * in.CStride
-				p.Pix[off+0] = in.Y[yi]
+		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
-				p.Pix[off+1] = in.Cb[ci]
+			ci := cy + x/2
-				p.Pix[off+2] = in.Cr[ci]
+			Pix[off+0] = Y[yy+x]
-				off += 3
+			Pix[off+1] = Cb[ci]
-			}
+			Pix[off+2] = Cr[ci]
+			off += 3
 		}
-	case image.YCbCrSubsampleRatio420:
+	}
-		for y := in.Rect.Min.Y; y < in.Rect.Max.Y; y++ {
+	return p
-			yy := (y - in.Rect.Min.Y) * in.YStride
+}
-			cy := (y/2 - in.Rect.Min.Y/2) * in.CStride
+
-			for x := in.Rect.Min.X; x < in.Rect.Max.X; x++ {
+func convertToYCC440(in *image.YCbCr, p *ycc) *ycc {
-				xx := (x - in.Rect.Min.X)
+	var off int
-				yi := yy + xx
+	Pix := p.Pix
-				ci := cy + xx/2
+	Y := in.Y
-				p.Pix[off+0] = in.Y[yi]
+	Cb := in.Cb
-				p.Pix[off+1] = in.Cb[ci]
+	Cr := in.Cr
-				p.Pix[off+2] = in.Cr[ci]
+	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-				off += 3
+		yy := y * in.YStride
-			}
+		cy := (y / 2) * in.CStride
+		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
+			ci := cy + x
+			Pix[off+0] = Y[yy+x]
+			Pix[off+1] = Cb[ci]
+			Pix[off+2] = Cr[ci]
+			off += 3
 		}
-	case image.YCbCrSubsampleRatio440:
+	}
-		for y := in.Rect.Min.Y; y < in.Rect.Max.Y; y++ {
+	return p
-			yy := (y - in.Rect.Min.Y) * in.YStride
+}
-			cy := (y/2 - in.Rect.Min.Y/2) * in.CStride
+
-			for x := in.Rect.Min.X; x < in.Rect.Max.X; x++ {
+func convertToYCC444(in *image.YCbCr, p *ycc) *ycc {
-				xx := (x - in.Rect.Min.X)
+	var off int
-				yi := yy + xx
+	Pix := p.Pix
-				ci := cy + xx
+	Y := in.Y
-				p.Pix[off+0] = in.Y[yi]
+	Cb := in.Cb
-				p.Pix[off+1] = in.Cb[ci]
+	Cr := in.Cr
-				p.Pix[off+2] = in.Cr[ci]
+	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-				off += 3
+		yy := y * in.YStride
-			}
+		cy := y * in.CStride
+		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
+			ci := cy + x
+			Pix[off+0] = Y[yy+x]
+			Pix[off+1] = Cb[ci]
+			Pix[off+2] = Cr[ci]
+			off += 3
 		}
-	default:
+	}
-		// Default to 4:4:4 subsampling.
+	return p
-		for y := in.Rect.Min.Y; y < in.Rect.Max.Y; y++ {
+}
-			yy := (y - in.Rect.Min.Y) * in.YStride
+
-			cy := (y - in.Rect.Min.Y) * in.CStride
+func convertToYCC411(in *image.YCbCr, p *ycc) *ycc {
-			for x := in.Rect.Min.X; x < in.Rect.Max.X; x++ {
+	var off int
-				xx := (x - in.Rect.Min.X)
+	Pix := p.Pix
-				yi := yy + xx
+	Y := in.Y
-				ci := cy + xx
+	Cb := in.Cb
-				p.Pix[off+0] = in.Y[yi]
+	Cr := in.Cr
-				p.Pix[off+1] = in.Cb[ci]
+	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
-				p.Pix[off+2] = in.Cr[ci]
+		yy := y * in.YStride
-				off += 3
+		cy := y * in.CStride
-			}
+		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
+			ci := cy + x/4
+			Pix[off+0] = Y[yy+x]
+			Pix[off+1] = Cb[ci]
+			Pix[off+2] = Cr[ci]
+			off += 3
 		}
 	}
-	return &p
+	return p
+}
+
+func convertToYCC410(in *image.YCbCr, p *ycc) *ycc {
+	var off int
+	Pix := p.Pix
+	Y := in.Y
+	Cb := in.Cb
+	Cr := in.Cr
+	for y := 0; y < in.Rect.Max.Y-in.Rect.Min.Y; y++ {
+		yy := y * in.YStride
+		cy := (y / 2) * in.CStride
+		for x := 0; x < in.Rect.Max.X-in.Rect.Min.X; x++ {
+			ci := cy + x/4
+			Pix[off+0] = Y[yy+x]
+			Pix[off+1] = Cb[ci]
+			Pix[off+2] = Cr[ci]
+			off += 3
+		}
+	}
+	return p
 }

vendor/modules.txt

@@ -518,7 +518,7 @@ github.com/mschoch/smat
 # github.com/msteinert/pam v0.0.0-20151204160544-02ccfbfaf0cc
 ## explicit
 github.com/msteinert/pam
-# github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5
+# github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646
 ## explicit
 github.com/nfnt/resize
 # github.com/niklasfasching/go-org v0.1.9