MapGuide and Zoomify layers use top-left as the tile origin, p=madair, r=me (closes #3160)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@11686 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Layer/MapGuide.js

@@ -116,6 +116,12 @@ OpenLayers.Layer.MapGuide = OpenLayers.Class(OpenLayers.Layer.Grid, {
      **/
     defaultSize: new OpenLayers.Size(300,300),
 
+    /** 
+     * Property: tileOriginCorner
+     * {String} MapGuide tile server uses top-left as tile origin
+     **/
+    tileOriginCorner: "tl",
+
     /**
      * Constructor: OpenLayers.Layer.MapGuide
      * Create a new Mapguide layer, either tiled or untiled.  

lib/OpenLayers/Layer/Zoomify.js

@@ -45,6 +45,12 @@ OpenLayers.Layer.Zoomify = OpenLayers.Class(OpenLayers.Layer.Grid, {
      */
     standardTileSize: 256,
 
+    /** 
+     * Property: tileOriginCorner
+     * {String} This layer uses top-left as tile origin
+     **/
+    tileOriginCorner: "tl",
+
     /**
      * Property: numberOfTiers
      * {Integer} Depth of the Zoomify pyramid, number of tiers (zoom levels)