diff --git a/vtm/src/org/oscim/backend/BitmapUtils.java b/vtm/src/org/oscim/backend/BitmapUtils.java
index a4f87460..686301e0 100644
--- a/vtm/src/org/oscim/backend/BitmapUtils.java
+++ b/vtm/src/org/oscim/backend/BitmapUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2010, 2011, 2012 mapsforge.org
+ * Copyright 2013 Hannes Janetzek
  *
  * This program is free software: you can redistribute it and/or modify it under the
  * terms of the GNU Lesser General Public License as published by the Free Software
@@ -20,42 +20,12 @@ import java.io.InputStream;
 import org.oscim.backend.canvas.Bitmap;
 
 public final class BitmapUtils {
-	// private static final String PREFIX_FILE = "file:";
-	// private static final String PREFIX_JAR = "jar:";
-	//
-	// private static InputStream createInputStream(String src) throws
-	// FileNotFoundException {
-	// if (src.startsWith(PREFIX_JAR)) {
-	// String name = "/org/oscim/theme/styles/" +
-	// src.substring(PREFIX_JAR.length());
-	//
-	// InputStream inputStream = BitmapUtils.class.getResourceAsStream(name);
-	// if (inputStream == null) {
-	// throw new FileNotFoundException("resource not found: " + src + " " +
-	// name);
-	// }
-	// return inputStream;
-	// } else if (src.startsWith(PREFIX_FILE)) {
-	// File file = new File(src.substring(PREFIX_FILE.length()));
-	// if (!file.exists()) {
-	// throw new IllegalArgumentException("file does not exist: " + src);
-	// } else if (!file.isFile()) {
-	// throw new IllegalArgumentException("not a file: " + src);
-	// } else if (!file.canRead()) {
-	// throw new IllegalArgumentException("cannot read file: " + src);
-	// }
-	// return new FileInputStream(file);
-	// }
-	// throw new IllegalArgumentException("invalid bitmap source: " + src);
-	// }
-
 	public static Bitmap createBitmap(String src) throws IOException {
 		if (src == null || src.length() == 0) {
 			// no image source defined
 			return null;
 		}
 
-		// InputStream inputStream = createInputStream(src);
 		InputStream inputStream = AssetAdapter.g.openFileAsStream(src);
 		if (inputStream == null)
 			throw new IllegalArgumentException("invalid bitmap source: " + src);
@@ -66,6 +36,6 @@ public final class BitmapUtils {
 	}
 
 	private BitmapUtils() {
-		throw new IllegalStateException();
 	}
+
 }
diff --git a/vtm/src/org/oscim/backend/CanvasAdapter.java b/vtm/src/org/oscim/backend/CanvasAdapter.java
index 7c6f9477..08392a78 100644
--- a/vtm/src/org/oscim/backend/CanvasAdapter.java
+++ b/vtm/src/org/oscim/backend/CanvasAdapter.java
@@ -33,13 +33,14 @@ public abstract class CanvasAdapter {
 
 	public abstract Bitmap decodeBitmap(InputStream inputStream);
 
+	public abstract Bitmap loadBitmapAsset(String fileName);
+
 	public abstract int getColor(Color color);
 
 	public abstract Paint getPaint();
 
 	public abstract int parseColor(String colorString);
 
-
 	public abstract Bitmap getBitmap(int width, int height, int format);
 
 	public abstract Canvas getCanvas();