MapPosition: use int to represent zoomLevel

add MapPosition.setFromLatLon utility

src/org/oscim/renderer/GLRenderer.java

@@ -166,7 +166,7 @@ public class GLRenderer implements GLSurfaceView.Renderer {
 				if (tile == null)
 					continue;
 
-				holder = new MapTile(x, y, mZoom);
+				holder = new MapTile(x, y, (byte)mZoom);
 				holder.isVisible = true;
 				holder.holder = tile;
 				tile.isVisible = true;

src/org/oscim/renderer/ScanBox.java

@@ -46,11 +46,11 @@ public abstract class ScanBox {
 	private Edge ca = new Edge();
 	private float minX, maxX;
 
-	protected byte mZoom;
+	protected int mZoom;
 
 	abstract void setVisible(int y, int x1, int x2);
 
-	public void scan(float[] coords, byte zoom) {
+	public void scan(float[] coords, int zoom) {
 		mZoom = zoom;
 
 		maxX = Float.MIN_VALUE;

src/org/oscim/renderer/TileManager.java

@@ -290,13 +290,13 @@ public class TileManager {
 	//
 	//	}
 
-	/* package */MapTile addTile(int x, int y, byte zoomLevel) {
+	/* package */MapTile addTile(int x, int y, int zoomLevel) {
 		MapTile tile;
 
 		tile = QuadTree.getTile(x, y, zoomLevel);
 
 		if (tile == null) {
-			tile = new MapTile(x, y, zoomLevel);
+			tile = new MapTile(x, y, (byte)zoomLevel);
 			QuadTree.add(tile);
 			mJobs.add(tile);
 			addToCache(tile);
@@ -392,7 +392,7 @@ public class TileManager {
 		// TODO there is probably  a better quad-tree distance function
 		double x = mapPosition.x;
 		double y = mapPosition.y;
-		byte zoom = mapPosition.zoomLevel;
+		int zoom = mapPosition.zoomLevel;
 		int h = Tile.TILE_SIZE >> 1;
 		long center = h << zoom;
 

src/org/oscim/renderer/overlays/GridOverlay.java

@@ -99,7 +99,7 @@ public class GridOverlay extends BasicOverlay {
 
 	private int mCurX = -1;
 	private int mCurY = -1;
-	private byte mCurZ = -1;
+	private int mCurZ = -1;
 
 	private boolean finished;