Shift container for all layer renderers together.

src/ol/renderer/LayerRenderer.js

@@ -1,5 +1,7 @@
 goog.provide('ol.renderer.LayerRenderer');
 
+goog.require('goog.math.Coordinate');
+
 /**
  * A single layer renderer that will be created by the composite map renderer.
  *
@@ -15,6 +17,15 @@ ol.renderer.LayerRenderer = function(container, layer) {
      */
     this.container_ = container;
 
+    /**
+     * Pixel offset between the layer renderer container and the composite
+     * renderer container.  These will always be integer values.
+     * 
+     * @type {goog.math.Coordinate}
+     * @protected
+     */
+    this.containerOffset_ = new goog.math.Coordinate(0, 0);
+
     /**
      * @type {!ol.layer.Layer}
      * @protected
@@ -23,6 +34,16 @@ ol.renderer.LayerRenderer = function(container, layer) {
 
 };
 
+/**
+ * Set the pixel offset between the layer renderer container and the composite
+ * renderer container.
+ *
+ * @param {goog.math.Coordinate} offset Integer pixel offset.
+ */
+ol.renderer.LayerRenderer.prototype.setContainerOffset = function(offset) {
+    this.containerOffset_ = offset;
+};
+
 /**
  * Get layer being rendered.
  *