Merge pull request #7270 from mircokroon/master

Add credit option to ArcGisMapServerImageryProvider

CONTRIBUTORS.md

@@ -199,3 +199,4 @@ See [CONTRIBUTING.md](CONTRIBUTING.md) for details on how to contribute to Cesiu
 * [Cedric Le Roux](https://github.com/cleroux)
 * [Dag Wästberg](https://github.com/dwastberg)
 * [Mussab Abdalla](https://github.com/baloola)
+* [Mirco Kroon](https://github.com/mircokroon)

Source/Scene/ArcGisMapServerImageryProvider.js

@@ -83,6 +83,7 @@ define([
      * @param {Ellipsoid} [options.ellipsoid] The ellipsoid.  If the tilingScheme is specified and used,
      *                    this parameter is ignored and the tiling scheme's ellipsoid is used instead. If neither
      *                    parameter is specified, the WGS84 ellipsoid is used.
+     * @param {Credit|String} [options.credit] A credit for the data source, which is displayed on the canvas.  This parameter is ignored when accessing a tiled server.
      * @param {Number} [options.tileWidth=256] The width of each tile in pixels.  This parameter is ignored when accessing a tiled server.
      * @param {Number} [options.tileHeight=256] The height of each tile in pixels.  This parameter is ignored when accessing a tiled server.
      * @param {Number} [options.maximumLevel] The maximum tile level to request, or undefined if there is no maximum.  This parameter is ignored when accessing
@@ -131,11 +132,16 @@ define([
         this._tileHeight = defaultValue(options.tileHeight, 256);
         this._maximumLevel = options.maximumLevel;
         this._tilingScheme = defaultValue(options.tilingScheme, new GeographicTilingScheme({ ellipsoid : options.ellipsoid }));
-        this._credit = undefined;
         this._useTiles = defaultValue(options.usePreCachedTilesIfAvailable, true);
         this._rectangle = defaultValue(options.rectangle, this._tilingScheme.rectangle);
         this._layers = options.layers;
 
+        var credit = options.credit;
+        if (typeof credit === 'string') {
+            credit = new Credit(credit);
+        }
+        this._credit = credit;
+
         /**
          * Gets or sets a value indicating whether feature picking is enabled.  If true, {@link ArcGisMapServerImageryProvider#pickFeatures} will
          * invoke the "identify" operation on the ArcGIS server and return the features included in the response.  If false,