Improve canvas DPI setting, fixes #349

docs/Changelog.md

@@ -13,6 +13,7 @@
 - vtm-ios-example module [#326](https://github.com/mapsforge/vtm/issues/326)
 - Handle layers enabled state [#342](https://github.com/mapsforge/vtm/issues/342)
 - Fix coord scale short overflow [#343](https://github.com/mapsforge/vtm/issues/343)
+- Improve canvas DPI setting [#349](https://github.com/mapsforge/vtm/issues/349)
 - Gretty plugin at web modules [#338](https://github.com/mapsforge/vtm/issues/338)
 - Many other minor improvements and bug fixes
 - [Solved issues](https://github.com/mapsforge/vtm/issues?q=is%3Aclosed+milestone%3A0.8.0)

vtm-android-gdx/src/org/oscim/gdx/MainActivity.java

@@ -1,6 +1,6 @@
 /*
  * Copyright 2013 Hannes Janetzek
- * Copyright 2016 devemux86
+ * Copyright 2016-2017 devemux86
  *
  * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
  *
@@ -42,7 +42,7 @@ public class MainActivity extends AndroidApplication {
         GLAdapter.init(new AndroidGL());
 
         DisplayMetrics metrics = getResources().getDisplayMetrics();
-        CanvasAdapter.dpi = (int) Math.max(metrics.xdpi, metrics.ydpi);
+        CanvasAdapter.dpi = (int) (metrics.scaledDensity * CanvasAdapter.DEFAULT_DPI);
         Tile.SIZE = Tile.calculateTileSize(metrics.scaledDensity);
 
         AndroidApplicationConfiguration cfg = new AndroidApplicationConfiguration();

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

@@ -81,7 +81,7 @@ public class MapView extends GLSurfaceView {
         GLAdapter.init(new AndroidGL());
 
         DisplayMetrics metrics = getResources().getDisplayMetrics();
-        CanvasAdapter.dpi = (int) Math.max(metrics.xdpi, metrics.ydpi);
+        CanvasAdapter.dpi = (int) (metrics.scaledDensity * CanvasAdapter.DEFAULT_DPI);
 
         /* Initialize the Map */
         mMap = new AndroidMap(this);