From 9d078142aa4b15b0676b830f882dbdf5eb0e8432 Mon Sep 17 00:00:00 2001
From: Hannes Janetzek <hannes.janetzek@gmail.com>
Date: Tue, 10 Jun 2014 20:20:56 +0200
Subject: [PATCH] add LineLayer setExtents to not add caps outside visible
 region

---
 .../oscim/layers/tile/vector/VectorTileLoader.java   |  2 ++
 vtm/src/org/oscim/renderer/elements/LineLayer.java   | 12 +++++++-----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/vtm/src/org/oscim/layers/tile/vector/VectorTileLoader.java b/vtm/src/org/oscim/layers/tile/vector/VectorTileLoader.java
index 0ff2f34c..893ed3d4 100644
--- a/vtm/src/org/oscim/layers/tile/vector/VectorTileLoader.java
+++ b/vtm/src/org/oscim/layers/tile/vector/VectorTileLoader.java
@@ -23,6 +23,7 @@ import org.oscim.core.MapElement;
 import org.oscim.core.MercatorProjection;
 import org.oscim.core.Tag;
 import org.oscim.core.TagSet;
+import org.oscim.core.Tile;
 import org.oscim.layers.tile.MapTile;
 import org.oscim.layers.tile.TileLoader;
 import org.oscim.layers.tile.vector.VectorTileLayer.TileLoaderProcessHook;
@@ -245,6 +246,7 @@ public class VectorTileLoader extends TileLoader implements IRenderTheme.Callbac
 			if (ll.line == null) {
 				ll.line = line;
 				ll.scale = line.fixed ? 1 : mLineScale;
+				ll.setExtents(-4, Tile.SIZE + 4);
 			}
 
 			if (line.outline) {
diff --git a/vtm/src/org/oscim/renderer/elements/LineLayer.java b/vtm/src/org/oscim/renderer/elements/LineLayer.java
index 68e0e797..25bc8f9c 100644
--- a/vtm/src/org/oscim/renderer/elements/LineLayer.java
+++ b/vtm/src/org/oscim/renderer/elements/LineLayer.java
@@ -24,7 +24,6 @@ import org.oscim.backend.GLAdapter;
 import org.oscim.backend.canvas.Paint.Cap;
 import org.oscim.core.GeometryBuffer;
 import org.oscim.core.MercatorProjection;
-import org.oscim.core.Tile;
 import org.oscim.renderer.GLShader;
 import org.oscim.renderer.GLState;
 import org.oscim.renderer.GLUtils;
@@ -73,6 +72,8 @@ public final class LineLayer extends RenderElement {
 
 	public float heightOffset;
 
+	private int tmin = Integer.MIN_VALUE, tmax = Integer.MAX_VALUE;
+
 	LineLayer(int layer) {
 		super(RenderElement.LINE);
 		this.level = layer;
@@ -87,6 +88,11 @@ public final class LineLayer extends RenderElement {
 		outlines = link;
 	}
 
+	public void setExtents(int min, int max) {
+		tmin = min;
+		tmax = max;
+	}
+
 	/**
 	 * For point reduction by minimal distance. Default is 1/8.
 	 */
@@ -108,9 +114,6 @@ public final class LineLayer extends RenderElement {
 			addLine(points, null, numPoints, closed);
 	}
 
-	private static int tmax = Tile.SIZE + 4;
-	private static int tmin = -4;
-
 	private void addLine(float[] points, short[] index, int numPoints, boolean closed) {
 
 		boolean rounded = false;
@@ -272,7 +275,6 @@ public final class LineLayer extends RenderElement {
 
 		curX = points[ipos++];
 		curY = points[ipos++];
-
 		nextX = points[ipos++];
 		nextY = points[ipos++];