Merge pull request #1483 from elemoine/vector-api-anchor-units

[vector-api] Support different anchor units in ol.style.Icon

examples/icon.js

@@ -18,9 +18,12 @@ var raster = new ol.layer.Tile({
 });
 
 var styleArray = [new ol.style.Style({
-  image: new ol.style.Icon({
+  image: new ol.style.Icon(/** @type {olx.style.IconOptions} */ ({
+    anchor: [0.5, 46],
+    anchorXUnits: 'fraction',
+    anchorYUnits: 'pixels',
     src: 'data/icon.png'
-  })
+  }))
 })];
 
 var vector = new ol.layer.Vector({