From 9f8bb35589ab934409da4880312e916e71a97b96 Mon Sep 17 00:00:00 2001
From: Julie Lala <jules@okfoc.us>
Date: Wed, 1 Jan 2014 14:18:31 -0500
Subject: find the biggest canvas on the page

---
 js/record.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'js/record.js')

diff --git a/js/record.js b/js/record.js
index fd5f832..06c8ba9 100644
--- a/js/record.js
+++ b/js/record.js
@@ -3,8 +3,12 @@
 
   var canvases = document.getElementsByTagName("canvas")
   if (canvases.length == 0) { alert("no canvas found"); return; }
-
-  var source = canvases[0]
+  var biggest = 0, biggest_area = 0;
+  for (var i in canvases) {
+    var area = canvases[i].width*canvases[i].height
+    if (area > biggest_area) biggest = i;
+  }
+  var source = canvases[biggest]
 
   var encoder = new GifEncoder()
   encoder.on("encoded-frame", encoded_frame)
-- 
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