Add the webp image type

weed/images/resizing.go

@@ -11,6 +11,8 @@ import (
 	"github.com/disintegration/imaging"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
+
+	_ "golang.org/x/image/webp"
 )
 
 func Resized(ext string, read io.ReadSeeker, width, height int, mode string) (resized io.ReadSeeker, w int, h int) {
@@ -47,6 +49,9 @@ func Resized(ext string, read io.ReadSeeker, width, height int, mode string) (re
 			jpeg.Encode(&buf, dstImage, nil)
 		case ".gif":
 			gif.Encode(&buf, dstImage, nil)
+		case ".webp":
+			// Webp does not have golang encoder.
+			png.Encode(&buf, dstImage)
 		}
 		return bytes.NewReader(buf.Bytes()), dstImage.Bounds().Dx(), dstImage.Bounds().Dy()
 	} else {

weed/images/resizing_test.go

@@ -0,0 +1,23 @@
+package images
+
+import (
+	"bytes"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+func TestResizing(t *testing.T) {
+	fname := "sample2.webp"
+
+	dat, _ := ioutil.ReadFile(fname)
+
+	resized, _, _ := Resized(".webp", bytes.NewReader(dat), 100, 30, "")
+	buf := new(bytes.Buffer)
+	buf.ReadFrom(resized)
+
+	ioutil.WriteFile("resized1.png", buf.Bytes(), 0644)
+
+	os.Remove("resized1.png")
+
+}