WebP resize support

weed/images/preprocess.go

@@ -17,7 +17,7 @@ func MaybePreprocessImage(filename string, data []byte, width, height int) (resi
 	ext := filepath.Ext(filename)
 	ext = strings.ToLower(ext)
 	switch ext {
-	case ".png", ".gif":
+	case ".png", ".gif", ".webp":
 		return Resized(ext, data, width, height)
 	case ".jpg", ".jpeg":
 		data = FixJpgOrientation(data)

weed/images/resizing.go

@@ -6,6 +6,7 @@ import (
 	"image/gif"
 	"image/jpeg"
 	"image/png"
+	"github.com/chai2010/webp"
 
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/disintegration/imaging"
@@ -37,6 +38,8 @@ func Resized(ext string, data []byte, width, height int) (resized []byte, w int,
 			jpeg.Encode(&buf, dstImage, nil)
 		case ".gif":
 			gif.Encode(&buf, dstImage, nil)
+		case ".webp":
+			webp.Encode(&buf, dstImage, &webp.Options{Quality: 70})
 		}
 		return buf.Bytes(), dstImage.Bounds().Dx(), dstImage.Bounds().Dy()
 	} else {