Polygon symbols default disabled, fix #405

docs/Changelog.md

@@ -9,6 +9,7 @@
 - Internal render themes improvements [#488](https://github.com/mapsforge/vtm/pull/488)
 - Map view roll [#474](https://github.com/mapsforge/vtm/pull/474)
 - Fling animation improvements [#489](https://github.com/mapsforge/vtm/pull/489)
+- Polygon symbols default disabled [#405](https://github.com/mapsforge/vtm/issues/405)
 - Map fractional zoom [#487](https://github.com/mapsforge/vtm/issues/487)
 - Render theme fallback internal resources [#477](https://github.com/mapsforge/vtm/issues/477)
 - Fix FadeStep alpha interpolation [#486](https://github.com/mapsforge/vtm/issues/486)

vtm/src/org/oscim/layers/tile/vector/labeling/LabelTileLoaderHook.java

@@ -1,6 +1,6 @@
 /*
  * Copyright 2013 Hannes Janetzek
- * Copyright 2016-2017 devemux86
+ * Copyright 2016-2018 devemux86
  * Copyright 2016 Andrey Novikov
  *
  * This file is part of the OpenScienceMap project (http://www.opensciencemap.org).
@@ -126,6 +126,10 @@ public class LabelTileLoaderHook implements TileLoaderThemeHook {
                 // TODO
             } else if (element.type == POLY) {
                 PointF centroid = element.labelPosition;
+                if (!Parameters.POLY_SYMBOL) {
+                    if (centroid == null)
+                        return false;
+                }
                 // skip unnecessary calculations if centroid is outside of visible area
                 if (centroid != null && (centroid.x < 0 || centroid.x > Tile.SIZE || centroid.y < 0 || centroid.y > Tile.SIZE))
                     return false;

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 devemux86
+ * Copyright 2017-2018 devemux86
  *
  * 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
@@ -32,10 +32,15 @@ public final class Parameters {
     public static int MAXIMUM_BUFFER_SIZE = 8000000;
 
     /**
-     * Optimal placement of text labels on polygons.
+     * Optimal placement of labels or symbols on polygons.
      */
     public static boolean POLY_LABEL = false;
 
+    /**
+     * Placement of symbols on polygons.
+     */
+    public static boolean POLY_SYMBOL = false;
+
     /**
      * POT textures in themes.
      */