Set canvas delegate when returning context2d from canvas

Author: Flamenco

plugins/canvas.js

@@ -7,7 +7,7 @@
  */
 
 /**
- * This plugin mimicks the HTML5 Canvas
+ * This plugin mimics the HTML5 Canvas
  * 
  * The goal is to provide a way for current canvas users to print directly to a PDF.
  */
@@ -23,6 +23,7 @@
 
 	jsPDFAPI.canvas = {
 		getContext : function(name) {
+			this.pdf.context2d._canvas = this;
 			return this.pdf.context2d;
 		},
 		style : {}