swig: add basic go bindings

WebPGetDecoderVersion
WebPGetInfo

Change-Id: Icb66207c2f492c9d20642544c0b31cc92b91cdcc

swig/libwebp.go

@@ -0,0 +1,45 @@
+/* ----------------------------------------------------------------------------
+ * This file was automatically generated by SWIG (http://www.swig.org).
+ * Version 2.0.10
+ *
+ * This file is not intended to be easily readable and contains a number of
+ * coding conventions designed to improve portability and efficiency. Do not make
+ * changes to this file unless you know what you are doing--modify the SWIG
+ * interface file instead.
+ * ----------------------------------------------------------------------------- */
+
+package libwebp
+
+import _ "runtime/cgo"
+import "unsafe"
+
+type _ unsafe.Pointer
+
+type _swig_fnptr *byte
+type _swig_memberptr *byte
+
+//extern libwebpSwigCgocall
+func SwigCgocall()
+
+//extern libwebpSwigCgocallDone
+func SwigCgocallDone()
+
+//extern libwebpSwigCgocallBack
+func SwigCgocallBack()
+
+//extern libwebpSwigCgocallBackDone
+func SwigCgocallBackDone()
+
+func WebPGetDecoderVersion() int
+func Wrapped_WebPGetInfo(string, []int, []int) int
+
+// WebPGetInfo has 2 output parameters, provide a version in the more natural
+// go idiom:
+func WebPGetInfo(webp []byte) (ok bool, width int, height int) {
+	w := []int{0}
+	h := []int{0}
+	ok = Wrapped_WebPGetInfo(string(webp), w, h) != 0
+	width = w[0]
+	height = h[0]
+	return
+}