Merge pull request blueimp#88 from bubbatls/patch-1

Optimisation for thumbnail

Author: blueimp

js/load-image-exif.js

@@ -9,7 +9,7 @@
  * https://opensource.org/licenses/MIT
  */
 
-/* global define */
+/* global define, Blob, URL */
 
 ;(function (factory) {
   'use strict'
@@ -38,17 +38,11 @@
   }
 
   loadImage.getExifThumbnail = function (dataView, offset, length) {
-    var hexData, i, b
     if (!length || offset + length > dataView.byteLength) {
       console.log('Invalid Exif data: Invalid thumbnail data.')
       return
     }
-    hexData = []
-    for (i = 0; i < length; i += 1) {
-      b = dataView.getUint8(offset + i)
-      hexData.push((b < 16 ? '0' : '') + b.toString(16))
-    }
-    return 'data:image/jpeg,%' + hexData.join('%')
+    return URL.createObjectURL(new Blob([dataView.buffer.slice(offset, offset + length)]))
   }
 
   loadImage.exifTagTypes = {