PathLayer(s) scaled width, fix #594

vtm-jts/src/org/oscim/layers/vector/VectorLayer.java

@@ -65,6 +65,8 @@ public class VectorLayer extends AbstractVectorLayer<Drawable> implements Gestur
 
     public static final Logger log = LoggerFactory.getLogger(VectorLayer.class);
 
+    private static final int STROKE_MIN_ZOOM = 12;
+
     //private final SpatialIndex<Drawable> mDrawables = new RTree<Drawable>();
     protected final SpatialIndex<Drawable> mDrawables = new QuadTree<Drawable>(1 << 30, 18);
 
@@ -263,21 +265,25 @@ public class VectorLayer extends AbstractVectorLayer<Drawable> implements Gestur
         if (ll.line == null) {
             ll.line = LineStyle.builder()
                     .reset()
+                    .blur(style.blur)
                     .cap(style.cap)
                     .color(style.strokeColor)
                     .fixed(style.fixed)
-                    .blur(style.blur)
                     .heightOffset(style.heightOffset)
                     .level(0)
                     .randomOffset(style.randomOffset)
                     .stipple(style.stipple)
                     .stippleColor(style.stippleColor)
                     .stippleWidth(style.stippleWidth)
+                    .strokeIncrease(style.strokeIncrease)
                     .strokeWidth(style.strokeWidth)
                     .texture(style.texture)
                     .build();
         }
 
+        if (!style.fixed && style.strokeIncrease > 1)
+            ll.scale = (float) Math.pow(style.strokeIncrease, Math.max(t.position.getZoom() - STROKE_MIN_ZOOM, 0));
+
         if (style.generalization != Style.GENERALIZATION_NONE) {
             line = DouglasPeuckerSimplifier.simplify(line, mMinX * style.generalization);
         }

vtm-jts/src/org/oscim/layers/vector/geometries/Style.java

@@ -46,6 +46,7 @@ public class Style {
 
     public final Paint.Cap cap;
     public final boolean fixed;
+    public final double strokeIncrease;
     public final float blur;
     public final int stipple;
     public final int stippleColor;
@@ -69,6 +70,7 @@ public class Style {
 
         cap = builder.cap;
         fixed = builder.fixed;
+        strokeIncrease = builder.strokeIncrease;
         blur = builder.blur;
         stipple = builder.stipple;
         stippleColor = builder.stippleColor;
@@ -103,6 +105,7 @@ public class Style {
 
         public Paint.Cap cap = Paint.Cap.ROUND;
         public boolean fixed = false;
+        public double strokeIncrease = 1;
         public float blur = 0;
         public int stipple = 0;
         public int stippleColor = Color.GRAY;
@@ -210,6 +213,11 @@ public class Style {
             return this;
         }
 
+        public Builder strokeIncrease(double strokeIncrease) {
+            this.strokeIncrease = strokeIncrease;
+            return this;
+        }
+
         public Builder blur(float blur) {
             this.blur = blur;
             return this;