Merge pull request #239 from ahocevar/3625

Removing imageOffset and using getImageSize. r=@elemoine

lib/OpenLayers/Layer.js

@@ -159,13 +159,6 @@ OpenLayers.Layer = OpenLayers.Class({
      */
     imageSize: null,
     
-    /**
-     * Property: imageOffset
-     * {<OpenLayers.Pixel>} For layers with a gutter, the image offset 
-     *     represents displacement due to the gutter.
-     */
-    imageOffset: null,
-
   // OPTIONS
 
     /** 
@@ -693,7 +686,7 @@ OpenLayers.Layer = OpenLayers.Class({
     /**
      * APIMethod: setTileSize
      * Set the tile size based on the map size.  This also sets layer.imageSize
-     *     and layer.imageOffset for use by Tile.Image.
+     *     or use by Tile.Image.
      * 
      * Parameters:
      * size - {<OpenLayers.Size>}
@@ -710,8 +703,6 @@ OpenLayers.Layer = OpenLayers.Class({
           //                              this.name + ": layers with " +
           //                              "gutters need non-null tile sizes");
           //}
-            this.imageOffset = new OpenLayers.Pixel(-this.gutter, 
-                                                    -this.gutter); 
             this.imageSize = new OpenLayers.Size(tileSize.w + (2*this.gutter), 
                                                  tileSize.h + (2*this.gutter)); 
         }

lib/OpenLayers/Tile/Image.js

@@ -208,11 +208,12 @@ OpenLayers.Tile.Image = OpenLayers.Class(OpenLayers.Tile, {
      * code.
      */
     positionTile: function() {
-        var style = this.getTile().style;
+        var style = this.getTile().style,
+            size = this.layer.getImageSize(this.bounds);
         style.left = this.position.x + "%";
         style.top = this.position.y + "%";
-        style.width = this.size.w + "%";
-        style.height = this.size.h + "%";
+        style.width = size.w + "%";
+        style.height = size.h + "%";
     },
 
     /** 
@@ -256,11 +257,6 @@ OpenLayers.Tile.Image = OpenLayers.Class(OpenLayers.Tile, {
                 var top = this.layer.gutter / this.layer.tileSize.h * 100;
                 style.left = -left + "%";
                 style.top = -top + "%";
-                style.width = (2 * left + 100) + "%";
-                style.height = (2 * top + 100) + "%";
-            } else {
-                style.width = "100%";
-                style.height = "100%";
             }
             style.visibility = "hidden";
             style.opacity = 0;