From b32a2e101cf4f01114bf520519706d4170fcac86 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Fri, 5 Apr 2013 00:14:10 +0200
Subject: [PATCH] Abort rendering when WebGL context is lost

---
 src/ol/renderer/webgl/webglmaprenderer.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/ol/renderer/webgl/webglmaprenderer.js b/src/ol/renderer/webgl/webglmaprenderer.js
index 93b5073e61..b45158251e 100644
--- a/src/ol/renderer/webgl/webglmaprenderer.js
+++ b/src/ol/renderer/webgl/webglmaprenderer.js
@@ -541,6 +541,10 @@ ol.renderer.webgl.Map.prototype.renderFrame = function(frameState) {
 
   var gl = this.getGL();
 
+  if (gl.isContextLost()) {
+    return false;
+  }
+
   if (goog.isNull(frameState)) {
     if (this.renderedVisible_) {
       goog.style.showElement(this.canvas_, false);