From 39087b2fa482294f61e019c266f7d47a9a80829f Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Wed, 4 May 2016 17:14:05 -0400
Subject: [PATCH] Reuse the frameState extent

---
 src/ol/map.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/ol/map.js b/src/ol/map.js
index f3327ae40d..6d860ac42c 100644
--- a/src/ol/map.js
+++ b/src/ol/map.js
@@ -1283,6 +1283,7 @@ ol.Map.prototype.renderFrame_ = function(time) {
 
   var size = this.getSize();
   var view = this.getView();
+  var extent = ol.extent.createEmpty();
   /** @type {?olx.FrameState} */
   var frameState = null;
   if (size !== undefined && ol.size.hasArea(size) && view && view.isDef()) {
@@ -1297,7 +1298,7 @@ ol.Map.prototype.renderFrame_ = function(time) {
       animate: false,
       attributions: {},
       coordinateToPixelMatrix: this.coordinateToPixelMatrix_,
-      extent: null,
+      extent: extent,
       focus: !this.focus_ ? viewState.center : this.focus_,
       index: this.frameIndex_++,
       layerStates: layerStates,
@@ -1329,7 +1330,7 @@ ol.Map.prototype.renderFrame_ = function(time) {
     preRenderFunctions.length = n;
 
     frameState.extent = ol.extent.getForViewAndSize(viewState.center,
-        viewState.resolution, viewState.rotation, frameState.size);
+        viewState.resolution, viewState.rotation, frameState.size, extent);
   }
 
   this.frameState_ = frameState;