X-Git-Url: http://git.roojs.org/?a=blobdiff_plain;f=Roo%2Fbootstrap%2FBezierSignature.js;fp=Roo%2Fbootstrap%2FBezierSignature.js;h=65bb2d26bae36b2bb3418816aeef34157c15a456;hb=2542b67d1a0768025056f2f330bfe50b64d1ad38;hp=379c181cc3372c46027cf33509cd2201134671f7;hpb=267027b86f0cf2f99b77589a6ca0aab049dbf514;p=roojs1

diff --git a/Roo/bootstrap/BezierSignature.js b/Roo/bootstrap/BezierSignature.js
index 379c181cc3..65bb2d26ba 100644
--- a/Roo/bootstrap/BezierSignature.js
+++ b/Roo/bootstrap/BezierSignature.js
@@ -174,8 +174,11 @@ Roo.extend(Roo.bootstrap.BezierSignature, Roo.bootstrap.Component,  {
         
         var canvas = this.canvasEl().dom;
         var ctx = this.canvasElCtx();
-        var img_data = ctx.getImageData(0, 0, canvas.width, canvas.height);
+        var img_data = false;
         
+        if(canvas.width > 0) {
+            var img_data = ctx.getImageData(0, 0, canvas.width, canvas.height);
+        }
         // setting canvas width will clean img data
         canvas.width = 0;
         
@@ -187,7 +190,9 @@ Roo.extend(Roo.bootstrap.BezierSignature, Roo.bootstrap.Component,  {
         
         canvas.width = this.el.dom.clientWidth - padding_left - padding_right;
         
-        ctx.putImageData(img_data, 0, 0);
+        if(img_data) {
+            ctx.putImageData(img_data, 0, 0);
+        }
     },
     
     _handleMouseDown: function(e)