From 4fe515808f35b7e6b00d3a0fe141851d4002ace1 Mon Sep 17 00:00:00 2001
From: Mugen87 <michael.herzog@human-interactive.org>
Date: Thu, 15 Nov 2018 15:11:42 +0100
Subject: [PATCH] ImageUtils: Create internal canvas only once

---
 src/extras/ImageUtils.js | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/extras/ImageUtils.js b/src/extras/ImageUtils.js
index e575c0db3c..ca1d0a4861 100644
--- a/src/extras/ImageUtils.js
+++ b/src/extras/ImageUtils.js
@@ -4,6 +4,8 @@
  * @author szimek / https://github.com/szimek/
  */
 
+var _canvas;
+
 var ImageUtils = {
 
 	getDataURL: function ( image ) {
@@ -20,11 +22,12 @@ var ImageUtils = {
 
 		} else {
 
-			canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
-			canvas.width = image.width;
-			canvas.height = image.height;
+			if ( _canvas === undefined ) _canvas = document.createElementNS( 'http://www.w3.org/1999/xhtml', 'canvas' );
+
+			_canvas.width = image.width;
+			_canvas.height = image.height;
 
-			var context = canvas.getContext( '2d' );
+			var context = _canvas.getContext( '2d' );
 
 			if ( image instanceof ImageData ) {
 
@@ -36,6 +39,8 @@ var ImageUtils = {
 
 			}
 
+			canvas = _canvas;
+
 		}
 
 		if ( canvas.width > 2048 || canvas.height > 2048 ) {
-- 
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