Allow custom tile size instead of the calculated one

vtm-android/src/org/oscim/android/MapView.java

@@ -84,7 +84,8 @@ public class MapView extends GLSurfaceView {
 
         DisplayMetrics metrics = getResources().getDisplayMetrics();
         CanvasAdapter.dpi = (int) (metrics.scaledDensity * CanvasAdapter.DEFAULT_DPI);
-        Tile.SIZE = Tile.calculateTileSize();
+        if (!Parameters.CUSTOM_TILE_SIZE)
+            Tile.SIZE = Tile.calculateTileSize();
 
         /* Initialize the Map */
         mMap = new AndroidMap(this);

vtm/src/org/oscim/utils/Parameters.java

@@ -16,6 +16,11 @@ package org.oscim.utils;
 
 public final class Parameters {
 
+    /**
+     * Allow custom tile size instead of the calculated one.
+     */
+    public static boolean CUSTOM_TILE_SIZE = false;
+
     /**
      * If true the <code>MapEventLayer2</code> will be used instead of default <code>MapEventLayer</code>.
      */