Get tilePixelRatio from MVT tiles

src/ol/vectortile.js

@@ -23,6 +23,12 @@ ol.VectorTile = function(tileCoord, state, src, format, tileLoadFunction) {
    */
   this.consumers = 0;
 
+  /**
+   * @private
+   * @type {ol.Extent}
+   */
+  this.extent_ = null;
+
   /**
    * @private
    * @type {ol.format.Feature}
@@ -82,6 +88,15 @@ ol.VectorTile.prototype.disposeInternal = function() {
 };
 
 
+/**
+ * Gets the extent of the vector tile.
+ * @return {ol.Extent} The extent.
+ */
+ol.VectorTile.prototype.getExtent = function() {
+  return this.extent_;
+};
+
+
 /**
  * Get the feature format assigned for reading this tile's features.
  * @return {ol.format.Feature} Feature format.
@@ -147,21 +162,33 @@ ol.VectorTile.prototype.load = function() {
  * Handler for successful tile load.
  * @param {Array.<ol.Feature>} features The loaded features.
  * @param {ol.proj.Projection} dataProjection Data projection.
+ * @param {ol.Extent} extent Extent.
  */
-ol.VectorTile.prototype.onLoad_ = function(features, dataProjection) {
+ol.VectorTile.prototype.onLoad = function(features, dataProjection, extent) {
   this.setProjection(dataProjection);
   this.setFeatures(features);
+  this.setExtent(extent);
 };
 
 
 /**
  * Handler for tile load errors.
  */
-ol.VectorTile.prototype.onError_ = function() {
+ol.VectorTile.prototype.onError = function() {
   this.setState(ol.TileState.ERROR);
 };
 
 
+/**
+ * Sets the extent of the vector tile.
+ * @param {ol.Extent} extent The extent.
+ * @api
+ */
+ol.VectorTile.prototype.setExtent = function(extent) {
+  this.extent_ = extent;
+};
+
+
 /**
  * @param {Array.<ol.Feature>} features Features.
  * @api