From f3f1fd1e3c91fe8a5ae22b3ee423c2e4099486f9 Mon Sep 17 00:00:00 2001
From: MoyuScript <i@moyu.moe>
Date: Fri, 28 Dec 2012 16:52:48 -0600
Subject: [PATCH] don't generate gradient on invisible elements

---
 src/Generate.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Generate.js b/src/Generate.js
index f07d8f7..4ba48c6 100644
--- a/src/Generate.js
+++ b/src/Generate.js
@@ -321,6 +321,10 @@
   };
 
   _html2canvas.Generate.Gradient = function(src, bounds) {
+    if(bounds.width === 0 || bounds.height === 0) {
+      return;
+    }
+    
     var canvas = document.createElement('canvas'),
     ctx = canvas.getContext('2d'),
     gradient, grad, i, len, img;