From 92c96b95f9d58889e2c2413f32bb32347e015904 Mon Sep 17 00:00:00 2001
From: Frederic Junod <frederic.junod@camptocamp.com>
Date: Thu, 14 Apr 2016 10:36:12 +0200
Subject: [PATCH] Reuse the frame state viewHints array if defined

---
 src/ol/map.js  |  2 +-
 src/ol/view.js | 11 +++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/ol/map.js b/src/ol/map.js
index a3e6baef93..8f48fb8dc7 100644
--- a/src/ol/map.js
+++ b/src/ol/map.js
@@ -1286,7 +1286,7 @@ ol.Map.prototype.renderFrame_ = function(time) {
   /** @type {?olx.FrameState} */
   var frameState = null;
   if (size !== undefined && ol.size.hasArea(size) && view && view.isDef()) {
-    var viewHints = view.getHints();
+    var viewHints = view.getHints(this.frameState_ ? this.frameState_.viewHints : undefined);
     var layerStatesArray = this.getLayerGroup().getLayerStatesArray();
     var layerStates = {};
     for (i = 0, ii = layerStatesArray.length; i < ii; ++i) {
diff --git a/src/ol/view.js b/src/ol/view.js
index 68a384448d..a98233848e 100644
--- a/src/ol/view.js
+++ b/src/ol/view.js
@@ -256,10 +256,17 @@ ol.View.prototype.getCenter = function() {
 
 
 /**
+ * @param {Array.<number>=} opt_hints Destination array.
  * @return {Array.<number>} Hint.
  */
-ol.View.prototype.getHints = function() {
-  return this.hints_.slice();
+ol.View.prototype.getHints = function(opt_hints) {
+  if (opt_hints !== undefined) {
+    opt_hints[0] = this.hints_[0];
+    opt_hints[1] = this.hints_[1];
+    return opt_hints;
+  } else {
+    return this.hints_.slice();
+  }
 };