Fix forEachLayerAtPixel for the canvas renderer

src/ol/renderer/webgl/imagelayer.js

@@ -219,13 +219,7 @@ ol.renderer.webgl.ImageLayer.prototype.hasFeatureAtCoordinate = function(coordin
 
 
 /**
- * @param {ol.Pixel} pixel Pixel.
- * @param {olx.FrameState} frameState FrameState.
- * @param {function(this: S, ol.layer.Layer, (Uint8ClampedArray|Uint8Array)): T} callback Layer
- *     callback.
- * @param {S} thisArg Value to use as `this` when executing `callback`.
- * @return {T|undefined} Callback result.
- * @template S,T,U
+ * @inheritDoc
  */
 ol.renderer.webgl.ImageLayer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {
   if (!this.image_ || !this.image_.getImage()) {

src/ol/renderer/webgl/layer.js

@@ -251,3 +251,16 @@ ol.renderer.webgl.Layer.prototype.handleWebGLContextLost = function() {
  * @return {boolean} whether composeFrame should be called.
  */
 ol.renderer.webgl.Layer.prototype.prepareFrame = function(frameState, layerState, context) {};
+
+
+/**
+ * @abstract
+ * @param {ol.Pixel} pixel Pixel.
+ * @param {olx.FrameState} frameState FrameState.
+ * @param {function(this: S, ol.layer.Layer, (Uint8ClampedArray|Uint8Array)): T} callback Layer
+ *     callback.
+ * @param {S} thisArg Value to use as `this` when executing `callback`.
+ * @return {T|undefined} Callback result.
+ * @template S,T,U
+ */
+ol.renderer.webgl.Layer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {};

src/ol/renderer/webgl/map.js

@@ -584,7 +584,7 @@ ol.renderer.webgl.Map.prototype.forEachLayerAtPixel = function(pixel, frameState
     var layer = layerState.layer;
     if (ol.layer.Layer.visibleAtResolution(layerState, viewState.resolution) &&
         layerFilter.call(thisArg, layer)) {
-      var layerRenderer = this.getLayerRenderer(layer);
+      var layerRenderer = /** @type {ol.renderer.webgl.Layer} */ (this.getLayerRenderer(layer));
       result = layerRenderer.forEachLayerAtPixel(
           pixel, frameState, callback, thisArg);
       if (result) {

src/ol/renderer/webgl/tilelayer.js

@@ -358,13 +358,7 @@ ol.renderer.webgl.TileLayer.prototype.prepareFrame = function(frameState, layerS
 
 
 /**
- * @param {ol.Pixel} pixel Pixel.
- * @param {olx.FrameState} frameState FrameState.
- * @param {function(this: S, ol.layer.Layer, (Uint8ClampedArray|Uint8Array)): T} callback Layer
- *     callback.
- * @param {S} thisArg Value to use as `this` when executing `callback`.
- * @return {T|undefined} Callback result.
- * @template S,T,U
+ * @inheritDoc
  */
 ol.renderer.webgl.TileLayer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {
   if (!this.framebuffer) {

src/ol/renderer/webgl/vectorlayer.js

@@ -154,13 +154,7 @@ ol.renderer.webgl.VectorLayer.prototype.hasFeatureAtCoordinate = function(coordi
 
 
 /**
- * @param {ol.Pixel} pixel Pixel.
- * @param {olx.FrameState} frameState FrameState.
- * @param {function(this: S, ol.layer.Layer, (Uint8ClampedArray|Uint8Array)): T} callback Layer
- *     callback.
- * @param {S} thisArg Value to use as `this` when executing `callback`.
- * @return {T|undefined} Callback result.
- * @template S,T,U
+ * @inheritDoc
  */
 ol.renderer.webgl.VectorLayer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {
   var coordinate = ol.transform.apply(