Add cvResize binding.

opencv/imgproc.go

@@ -0,0 +1,37 @@
+// Copyright 2013 jrweizhang AT gmail.com. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package opencv
+
+//#include "opencv.h"
+//#cgo linux  pkg-config: opencv
+//#cgo darwin pkg-config: opencv
+//#cgo windows LDFLAGS: -lopencv_core242.dll -lopencv_imgproc242.dll -lopencv_photo242.dll -lopencv_highgui242.dll -lstdc++
+import "C"
+import (
+	//"errors"
+	"log"
+	"unsafe"
+)
+
+func Resize(src *IplImage, width, height, interpolation int) *IplImage {
+	if width == 0 && height == 0 {
+		panic("Width and Height cannot be 0 at the same time")
+	}
+	if width == 0 {
+		ratio := float64(height / src.Height())
+		width = int(float64(src.Width()) * ratio)
+		log.Println(ratio)
+		log.Println(width)
+	} else if height == 0 {
+		ratio := float64(width / src.Width())
+		height = int(float64(src.Height()) * ratio)
+		log.Println(ratio)
+		log.Println(height)
+	}
+
+	dst := CreateImage(width, height, src.Depth(), src.Channels())
+	C.cvResize(unsafe.Pointer(src), unsafe.Pointer(dst), C.int(interpolation))
+	return dst
+}