try to avoid objectURL to get Safari to work

Author: timelyportfolio

src/snapshot/svgtoimg.js

@@ -25,17 +25,15 @@ function svgToImg(opts) {
 
         var ctx = canvas.getContext('2d');
         var img = new Image();
-        var DOMURL = window.URL || window.webkitURL;
-        var svgBlob = new Blob([svg], {type: 'image/svg+xml;charset=utf-8'});
-        var url = DOMURL.createObjectURL(svgBlob);
+        
+        var base64Svg = 'data:image/svg+xml,' + encodeURIComponent(svg);
 
         canvas.height = opts.height || 150;
         canvas.width = opts.width || 300;
 
         img.onload = function() {
             var imgData;
 
-            DOMURL.revokeObjectURL(url);
             ctx.drawImage(img, 0, 0);
 
             switch(format) {
@@ -68,7 +66,6 @@ function svgToImg(opts) {
         };
 
         img.onerror = function(err) {
-            DOMURL.revokeObjectURL(url);
             reject(err);
             // eventually remove the ev
             //  in favor of promises