From ecedccb2659c1eac8f5492035a5366de0041e7e7 Mon Sep 17 00:00:00 2001
From: Hannes Janetzek <hannes.janetzek@gmail.com>
Date: Sun, 24 Feb 2013 11:25:28 +0100
Subject: [PATCH] fix possible invalid vbo reads - make sure there is an
 additional vertex for interleaving

---
 src/org/oscim/renderer/layer/Layers.java       | 2 ++
 src/org/oscim/renderer/layer/LineTexLayer.java | 9 +++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/org/oscim/renderer/layer/Layers.java b/src/org/oscim/renderer/layer/Layers.java
index 05499077..e88a0540 100644
--- a/src/org/oscim/renderer/layer/Layers.java
+++ b/src/org/oscim/renderer/layer/Layers.java
@@ -157,6 +157,8 @@ public class Layers {
 				//sbuf.position(sbuf.position() + 6);
 				addPoolItems(l, sbuf);
 				//l.offset -= 12;
+
+				sbuf.position(sbuf.position() + 6);
 			}
 		}
 
diff --git a/src/org/oscim/renderer/layer/LineTexLayer.java b/src/org/oscim/renderer/layer/LineTexLayer.java
index 4f2a2712..95cfc3f4 100644
--- a/src/org/oscim/renderer/layer/LineTexLayer.java
+++ b/src/org/oscim/renderer/layer/LineTexLayer.java
@@ -94,8 +94,13 @@ public final class LineTexLayer extends Layer {
 
 			// HACK add one vertex offset when compiling
 			// buffer otherwise one cant use the full
-			// VertexItem
-			//verticesCnt = 1;
+			// VertexItem (see Layers.compile)
+			// add the two 'x' at front and end
+			//verticesCnt = 2;
+
+			// the additional end vertex to make sure
+			// not to read outside allocated memory
+			verticesCnt = 1;
 		}
 
 		VertexPoolItem si = curItem;