From 5603cdd3934e83a5a366710449569438a9b45545 Mon Sep 17 00:00:00 2001
From: mappu <mappu04@gmail.com>
Date: Mon, 4 Jun 2018 17:41:07 +1200
Subject: [PATCH] add compiletime build tag 'disableimagecrush' to remove cgo
 dependency

---
 image.go               |  4 +---
 imagecrush.go          |  6 ++++++
 imagecrush_disabled.go | 12 ++++++++++++
 3 files changed, 19 insertions(+), 3 deletions(-)
 create mode 100644 imagecrush_disabled.go

diff --git a/image.go b/image.go
index a1648ba..33238cc 100644
--- a/image.go
+++ b/image.go
@@ -4,8 +4,6 @@ import (
 	"bytes"
 	"image"
 	"image/jpeg"
-
-	"code.ivysaur.me/imagequant"
 )
 
 func (this *Thumbnailer) RenderScaledImage(src image.Image) ([]byte, error) {
@@ -60,7 +58,7 @@ func (this *Thumbnailer) RenderScaledImage(src image.Image) ([]byte, error) {
 
 	switch this.ofmt {
 	case OUTPUT_PNG_CRUSH:
-		return crush(dest, imagequant.SPEED_FASTEST)
+		return crushFast(dest)
 
 	case OUTPUT_JPG:
 		buff := bytes.Buffer{}
diff --git a/imagecrush.go b/imagecrush.go
index f387192..2254af7 100644
--- a/imagecrush.go
+++ b/imagecrush.go
@@ -1,3 +1,5 @@
+//+build !disableimagecrush
+
 package thumbnail
 
 import (
@@ -51,6 +53,10 @@ func rgb8PaletteToGoImage(w, h int, rgb8data []byte, pal color.Palette) image.Im
 	return ret
 }
 
+func crushFast(img image.Image) ([]byte, error) {
+	return crush(img, imagequant.SPEED_FASTEST)
+}
+
 func crush(img image.Image, speed int) ([]byte, error) {
 
 	width := img.Bounds().Max.X
diff --git a/imagecrush_disabled.go b/imagecrush_disabled.go
new file mode 100644
index 0000000..970aeb5
--- /dev/null
+++ b/imagecrush_disabled.go
@@ -0,0 +1,12 @@
+// +build disableimagecrush
+
+package thumbnail
+
+import (
+	"errors"
+	"image"
+)
+
+func crushFast(img image.Image) ([]byte, error) {
+	return nil, errors.New("Pngquant not compiled in")
+}