Add ol.renderer.webgl.ImageLayer#forEachFeatureAtPixel

src/ol/renderer/webgl/webglimagelayerrenderer.js

@@ -72,6 +72,27 @@ ol.renderer.webgl.ImageLayer.prototype.createTexture_ = function(image) {
 };
 
 
+/**
+ * @inheritDoc
+ */
+ol.renderer.webgl.ImageLayer.prototype.forEachFeatureAtPixel =
+    function(coordinate, frameState, callback, opt_obj) {
+  var layer = this.getLayer();
+  var source = layer.getSource();
+  goog.asserts.assertInstanceof(source, ol.source.Image);
+  var extent = frameState.extent;
+  var resolution = frameState.view2DState.resolution;
+  var rotation = frameState.view2DState.rotation;
+  return source.forEachFeatureAtPixel(extent, resolution, rotation, coordinate,
+      /**
+       * @param {ol.Feature} feature Feature.
+       */
+      function(feature) {
+        return callback.call(opt_obj, feature, this);
+      });
+};
+
+
 /**
  * @inheritDoc
  */