From 65c922f580a1be1cc91ca1fa5c71a460bda39d4b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=89ric=20Lemoine?= <eric.lemoine@gmail.com>
Date: Mon, 2 Dec 2013 12:56:57 +0100
Subject: [PATCH] Add ol.renderer.canvas.VectorLayer#forEachFeatureAtPixel

---
 .../canvas/canvasvectorlayerrenderer.js       | 30 +++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/src/ol/renderer/canvas/canvasvectorlayerrenderer.js b/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
index 010e9d5949..4fca4bdfe0 100644
--- a/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
+++ b/src/ol/renderer/canvas/canvasvectorlayerrenderer.js
@@ -81,6 +81,32 @@ ol.renderer.canvas.VectorLayer.prototype.composeFrame =
 };
 
 
+/**
+ * @inheritDoc
+ */
+ol.renderer.canvas.VectorLayer.prototype.forEachFeatureAtPixel =
+    function(pixel, callback) {
+  if (!goog.isNull(this.replayGroup_)) {
+    goog.asserts.assert(!ol.extent.isEmpty(this.renderedExtent_));
+    goog.asserts.assert(!isNaN(this.renderedResolution_));
+    var coordinate = this.getMap().getCoordinateFromPixel(pixel);
+    var renderGeometryFunction = this.getRenderGeometryFunction_();
+    goog.asserts.assert(goog.isFunction(renderGeometryFunction));
+    this.replayGroup_.forEachGeometryAtCoordinate(this.renderedExtent_,
+        this.renderedResolution_, coordinate, renderGeometryFunction,
+        /**
+         * @param {ol.geom.Geometry} geometry Geometry.
+         * @param {Object} data Data.
+         */
+        function(geometry, data) {
+          var feature = /** @type {ol.Feature} */ (data);
+          goog.asserts.assert(goog.isDef(feature));
+          callback(feature);
+        });
+  }
+};
+
+
 /**
  * @private
  * @return {function(ol.geom.Geometry): boolean|undefined} Render geometry
@@ -199,12 +225,12 @@ ol.renderer.canvas.VectorLayer.prototype.renderFeature =
             this.handleImageStyleChange_, false, this);
         imageStyle.load();
       } else if (imageStyle.imageState == ol.style.ImageState.LOADED) {
-        ol.renderer.vector.renderFeature(replayGroup, feature, style);
+        ol.renderer.vector.renderFeature(replayGroup, feature, style, feature);
       }
       goog.asserts.assert(imageStyle.imageState != ol.style.ImageState.IDLE);
       loading = imageStyle.imageState == ol.style.ImageState.LOADING;
     } else {
-      ol.renderer.vector.renderFeature(replayGroup, feature, style);
+      ol.renderer.vector.renderFeature(replayGroup, feature, style, feature);
     }
   }
   return loading;