From 34d5f2481652ee07673f562b9b0c2abf7377893e Mon Sep 17 00:00:00 2001
From: Ivan Grcic <igrcic@gmail-com>
Date: Fri, 14 Feb 2014 07:52:43 +0100
Subject: [PATCH] Do not load tiles outside extents for TileWMS source

---
 src/ol/source/tilewmssource.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/ol/source/tilewmssource.js b/src/ol/source/tilewmssource.js
index f80ec49719..24fa7c146c 100644
--- a/src/ol/source/tilewmssource.js
+++ b/src/ol/source/tilewmssource.js
@@ -346,6 +346,13 @@ ol.source.TileWMS.prototype.tileUrlFunction_ =
     tileExtent = ol.extent.buffer(tileExtent,
         tileResolution * gutter, tileExtent);
   }
+
+  var extent = this.getExtent();
+  if (!goog.isNull(extent) && (!ol.extent.intersects(tileExtent, extent) ||
+      ol.extent.touches(tileExtent, extent))) {
+    return undefined;
+  }
+
   if (pixelRatio != 1) {
     tileSize = (tileSize * pixelRatio + 0.5) | 0;
   }