Merge pull request #1350 from elemoine/gutter

Add gutter support to ol.source.TileWMS

src/ol/source/tilewmssource.js

@@ -35,6 +35,12 @@ ol.source.TileWMS = function(options) {
     urls = ol.TileUrlFunction.expandUrl(options.url);
   }
 
+  /**
+   * @private
+   * @type {number}
+   */
+  this.gutter_ = goog.isDef(options.gutter) ? options.gutter : 0;
+
   /**
    * @private
    * @type {Object}
@@ -52,7 +58,7 @@ ol.source.TileWMS = function(options) {
     var tileUrlFunctions = goog.array.map(
         urls, function(url) {
           return ol.TileUrlFunction.createFromParamsFunction(
-              url, this.params_, ol.source.wms.getUrl);
+              url, this.params_, this.gutter_, ol.source.wms.getUrl);
         }, this);
     tileUrlFunction = ol.TileUrlFunction.createFromTileUrlFunctions(
         tileUrlFunctions);
@@ -117,6 +123,14 @@ ol.source.TileWMS = function(options) {
 goog.inherits(ol.source.TileWMS, ol.source.TileImage);
 
 
+/**
+ * @inheritDoc
+ */
+ol.source.TileWMS.prototype.getGutter = function() {
+  return this.gutter_;
+};
+
+
 /**
  * @inheritDoc
  */