From bdde7151a201d19750509dcac89d744cc8695363 Mon Sep 17 00:00:00 2001
From: Andrea Bogazzi <andreabogazzi79@gmail.com>
Date: Sun, 21 Sep 2014 23:41:07 +0200
Subject: [PATCH] Update canvas.class.js

fix for ie8 missing width and height in bounds
---
 src/canvas.class.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/canvas.class.js b/src/canvas.class.js
index e6fef510..351a5adf 100644
--- a/src/canvas.class.js
+++ b/src/canvas.class.js
@@ -831,6 +831,21 @@
           bounds = upperCanvasEl.getBoundingClientRect(),
           cssScale;
 
+      if (!bounds.width || !bounds.height) {
+        if ('top' in bounds && 'bottom' in bounds) {
+          bounds.height = bounds.top - bounds.bottom;
+        }
+        else {
+          bounds.height = 0;
+        }
+        if ('right' in bounds && 'left' in bounds) {
+          bounds.width = bounds.right - bounds.left;
+        }
+        else {
+          bounds.width = 0;
+        }
+      }
+
       this.calcOffset();
 
       pointer.x = pointer.x - this._offset.left;