From 331597b9f8a7942cbcb233a328301e4d5bf94fb0 Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Fri, 11 Jan 2019 23:28:47 +0200
Subject: Switch to Go modules and make other changes

---
 .../github.com/disintegration/imaging/effects.go   | 173 ---------------------
 1 file changed, 173 deletions(-)
 delete mode 100644 vendor/github.com/disintegration/imaging/effects.go

(limited to 'vendor/github.com/disintegration/imaging/effects.go')

diff --git a/vendor/github.com/disintegration/imaging/effects.go b/vendor/github.com/disintegration/imaging/effects.go
deleted file mode 100644
index 149cfeb..0000000
--- a/vendor/github.com/disintegration/imaging/effects.go
+++ /dev/null
@@ -1,173 +0,0 @@
-package imaging
-
-import (
-	"image"
-	"math"
-)
-
-func gaussianBlurKernel(x, sigma float64) float64 {
-	return math.Exp(-(x*x)/(2*sigma*sigma)) / (sigma * math.Sqrt(2*math.Pi))
-}
-
-// Blur produces a blurred version of the image using a Gaussian function.
-// Sigma parameter must be positive and indicates how much the image will be blurred.
-//
-// Usage example:
-//
-//	dstImage := imaging.Blur(srcImage, 3.5)
-//
-func Blur(img image.Image, sigma float64) *image.NRGBA {
-	if sigma <= 0 {
-		return Clone(img)
-	}
-
-	radius := int(math.Ceil(sigma * 3.0))
-	kernel := make([]float64, radius+1)
-
-	for i := 0; i <= radius; i++ {
-		kernel[i] = gaussianBlurKernel(float64(i), sigma)
-	}
-
-	return blurVertical(blurHorizontal(img, kernel), kernel)
-}
-
-func blurHorizontal(img image.Image, kernel []float64) *image.NRGBA {
-	src := newScanner(img)
-	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
-	radius := len(kernel) - 1
-
-	parallel(0, src.h, func(ys <-chan int) {
-		scanLine := make([]uint8, src.w*4)
-		scanLineF := make([]float64, len(scanLine))
-		for y := range ys {
-			src.scan(0, y, src.w, y+1, scanLine)
-			for i, v := range scanLine {
-				scanLineF[i] = float64(v)
-			}
-			for x, idx := 0, 0; x < src.w; x, idx = x+1, idx+4 {
-				min := x - radius
-				if min < 0 {
-					min = 0
-				}
-				max := x + radius
-				if max > src.w-1 {
-					max = src.w - 1
-				}
-
-				var r, g, b, a, wsum float64
-				for ix := min; ix <= max; ix++ {
-					i := ix * 4
-					weight := kernel[absint(x-ix)]
-					wsum += weight
-					wa := scanLineF[i+3] * weight
-					r += scanLineF[i+0] * wa
-					g += scanLineF[i+1] * wa
-					b += scanLineF[i+2] * wa
-					a += wa
-				}
-				if a != 0 {
-					r /= a
-					g /= a
-					b /= a
-				}
-
-				scanLine[idx+0] = clamp(r)
-				scanLine[idx+1] = clamp(g)
-				scanLine[idx+2] = clamp(b)
-				scanLine[idx+3] = clamp(a / wsum)
-			}
-			copy(dst.Pix[y*dst.Stride:], scanLine)
-		}
-	})
-
-	return dst
-}
-
-func blurVertical(img image.Image, kernel []float64) *image.NRGBA {
-	src := newScanner(img)
-	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
-	radius := len(kernel) - 1
-
-	parallel(0, src.w, func(xs <-chan int) {
-		scanLine := make([]uint8, src.h*4)
-		scanLineF := make([]float64, len(scanLine))
-		for x := range xs {
-			src.scan(x, 0, x+1, src.h, scanLine)
-			for i, v := range scanLine {
-				scanLineF[i] = float64(v)
-			}
-			for y := 0; y < src.h; y++ {
-				min := y - radius
-				if min < 0 {
-					min = 0
-				}
-				max := y + radius
-				if max > src.h-1 {
-					max = src.h - 1
-				}
-
-				var r, g, b, a, wsum float64
-				for iy := min; iy <= max; iy++ {
-					i := iy * 4
-					weight := kernel[absint(y-iy)]
-					wsum += weight
-					wa := scanLineF[i+3] * weight
-					r += scanLineF[i+0] * wa
-					g += scanLineF[i+1] * wa
-					b += scanLineF[i+2] * wa
-					a += wa
-				}
-				if a != 0 {
-					r /= a
-					g /= a
-					b /= a
-				}
-
-				j := y*dst.Stride + x*4
-				dst.Pix[j+0] = clamp(r)
-				dst.Pix[j+1] = clamp(g)
-				dst.Pix[j+2] = clamp(b)
-				dst.Pix[j+3] = clamp(a / wsum)
-			}
-		}
-	})
-
-	return dst
-}
-
-// Sharpen produces a sharpened version of the image.
-// Sigma parameter must be positive and indicates how much the image will be sharpened.
-//
-// Usage example:
-//
-//	dstImage := imaging.Sharpen(srcImage, 3.5)
-//
-func Sharpen(img image.Image, sigma float64) *image.NRGBA {
-	if sigma <= 0 {
-		return Clone(img)
-	}
-
-	src := newScanner(img)
-	dst := image.NewNRGBA(image.Rect(0, 0, src.w, src.h))
-	blurred := Blur(img, sigma)
-
-	parallel(0, src.h, func(ys <-chan int) {
-		scanLine := make([]uint8, src.w*4)
-		for y := range ys {
-			src.scan(0, y, src.w, y+1, scanLine)
-			j := y * dst.Stride
-			for i := 0; i < src.w*4; i++ {
-				val := int(scanLine[i])<<1 - int(blurred.Pix[j])
-				if val < 0 {
-					val = 0
-				} else if val > 0xff {
-					val = 0xff
-				}
-				dst.Pix[j] = uint8(val)
-				j++
-			}
-		}
-	})
-
-	return dst
-}
-- 
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