From 8e1ffbf91e4430e1ad15d1f035f70b447a549c7d Mon Sep 17 00:00:00 2001
From: Frederic Junod <frederic.junod@camptocamp.com>
Date: Thu, 14 Apr 2016 10:21:57 +0200
Subject: [PATCH] Reuse the frame state extent array if defined

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

diff --git a/src/ol/map.js b/src/ol/map.js
index 887ad12021..a3e6baef93 100644
--- a/src/ol/map.js
+++ b/src/ol/map.js
@@ -1329,7 +1329,8 @@ 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,
+        this.frameState_ ? this.frameState_.extent : undefined);
   }
 
   this.frameState_ = frameState;