From d340fa2dc3076bbb9d4ddc6462740469abc7cf9a Mon Sep 17 00:00:00 2001
From: Milan Nikolic <gen2brain@gmail.com>
Date: Tue, 17 Jul 2018 14:51:18 +0200
Subject: [PATCH] Allow use of native image/jpeg

---
 README.md              |  2 +-
 encoder/encode.go      |  3 ++-
 encoder/encode_jpeg.go | 30 ++++++++++++++++++++++++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 encoder/encode_jpeg.go

diff --git a/README.md b/README.md
index 4f0e04e..c6de90c 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ or
 ### Requirements
 
 * [OpenCV](http://opencv.org/) (default is version 2.x via [go-opencv](https://github.com/lazywei/go-opencv), use `-tags cv3` for [gocv](https://github.com/hybridgroup/gocv))
-* [libjpeg-turbo](https://www.libjpeg-turbo.org/)
+* [libjpeg-turbo](https://www.libjpeg-turbo.org/) (use `-tags jpeg` for native image/jpeg)
 
 
 ### Download
diff --git a/encoder/encode.go b/encoder/encode.go
index 96b10bb..bd22186 100644
--- a/encoder/encode.go
+++ b/encoder/encode.go
@@ -1,9 +1,10 @@
+// +build !jpeg
+
 // Package encoder.
 package encoder
 
 import (
 	"image"
-	//"image/jpeg"
 	"io"
 
 	jpeg "github.com/antonini/golibjpegturbo"
diff --git a/encoder/encode_jpeg.go b/encoder/encode_jpeg.go
new file mode 100644
index 0000000..c7487e6
--- /dev/null
+++ b/encoder/encode_jpeg.go
@@ -0,0 +1,30 @@
+// +build jpeg
+
+// Package encoder.
+package encoder
+
+import (
+	"image"
+	"image/jpeg"
+	"io"
+)
+
+// New returns a new Encoder.
+func New(w io.Writer) *Encoder {
+	return &Encoder{w}
+}
+
+// Encoder struct.
+type Encoder struct {
+	w io.Writer
+}
+
+// Encode encodes image to JPEG.
+func (e Encoder) Encode(img image.Image) error {
+	err := jpeg.Encode(e.w, img, &jpeg.Options{Quality: 75})
+	if err != nil {
+		return err
+	}
+
+	return nil
+}