From 8c984cc8f78e9b201805f91cf945290c50f50b4d Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Tue, 4 Mar 2014 15:59:18 +0100
Subject: [PATCH] Load features before rendering

---
 src/ol/renderer/canvas/canvasvectorlayerrenderer.js | 1 +
 src/ol/source/vectorsource.js                       | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/src/ol/renderer/canvas/canvasvectorlayerrenderer.js b/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
index 4a59c94c9d..4de7415bb1 100644
--- a/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
+++ b/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
@@ -207,6 +207,7 @@ ol.renderer.canvas.VectorLayer.prototype.prepareFrame =
   var tolerance = frameStateResolution / (2 * pixelRatio);
   var replayGroup = new ol.render.canvas.ReplayGroup(tolerance, extent,
       frameStateResolution);
+  vectorSource.loadFeatures(extent, frameStateResolution);
   var renderFeature =
       /**
        * @param {ol.Feature} feature Feature.
diff --git a/src/ol/source/vectorsource.js b/src/ol/source/vectorsource.js
index 6383b6dcd9..71d8dc8b2c 100644
--- a/src/ol/source/vectorsource.js
+++ b/src/ol/source/vectorsource.js
@@ -337,6 +337,13 @@ ol.source.Vector.prototype.isEmpty = function() {
 };
 
 
+/**
+ * @param {ol.Extent} extent Extent.
+ * @param {number} resolution Resolution.
+ */
+ol.source.Vector.prototype.loadFeatures = goog.nullFunction;
+
+
 /**
  * @param {ol.Feature} feature Feature.
  * @todo stability experimental