Give vector image source a style option

src/ol/source/imagevectorsource.js

@@ -12,6 +12,7 @@ goog.require('ol.render.canvas.ReplayGroup');
 goog.require('ol.renderer.vector');
 goog.require('ol.source.ImageCanvas');
 goog.require('ol.source.Vector');
+goog.require('ol.style.Style');
 goog.require('ol.vec.Mat4');
 
 
@@ -40,12 +41,38 @@ ol.source.ImageVector = function(options) {
    */
   this.source_ = options.source;
 
+
+  /**
+   * @type {ol.feature.StyleFunction}
+   */
+  var styleFunction;
+
+  if (goog.isDef(options.style)) {
+    if (goog.isFunction(options.style)) {
+      styleFunction = /** @type {ol.feature.StyleFunction} */ (options.style);
+    } else {
+      /**
+       * @type {Array.<ol.style.Style>}
+       */
+      var styles;
+      if (goog.isArray(options.style)) {
+        styles = options.style;
+      } else {
+        goog.asserts.assertInstanceof(options.style, ol.style.Style);
+        styles = [options.style];
+      }
+      styleFunction = function(feature, resolution) {
+        return styles;
+      };
+    }
+  }
+
   /**
    * @private
    * @type {!ol.feature.StyleFunction}
    */
-  this.styleFunction_ = goog.isDef(options.styleFunction) ?
-      options.styleFunction : ol.feature.defaultStyleFunction;
+  this.styleFunction_ = goog.isDef(styleFunction) ?
+      styleFunction : ol.feature.defaultStyleFunction;
 
   /**
    * @private