From 6330f8e0018e69a318be2af2e63c9e8a2fae9a69 Mon Sep 17 00:00:00 2001
From: Elias Naur <elias.naur@gmail.com>
Date: Sat, 24 Jul 2004 16:34:07 +0000
Subject: [PATCH] Make sure VBOTracker reset the current tracker when
 GLContext.useContext(null) is called

---
 src/java/org/lwjgl/opengl/GLContext.java  | 1 +
 src/java/org/lwjgl/opengl/VBOTracker.java | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/java/org/lwjgl/opengl/GLContext.java b/src/java/org/lwjgl/opengl/GLContext.java
index fa37bde8..e9352b87 100644
--- a/src/java/org/lwjgl/opengl/GLContext.java
+++ b/src/java/org/lwjgl/opengl/GLContext.java
@@ -234,6 +234,7 @@ public final class GLContext {
 			if (did_auto_load)
 				unloadOpenGLLibrary();
 			currentContext = null;
+			VBOTracker.setCurrent(null);
 			return;
 		}
 		// Is this the same as last time?
diff --git a/src/java/org/lwjgl/opengl/VBOTracker.java b/src/java/org/lwjgl/opengl/VBOTracker.java
index d114ffd2..1e2f07b2 100644
--- a/src/java/org/lwjgl/opengl/VBOTracker.java
+++ b/src/java/org/lwjgl/opengl/VBOTracker.java
@@ -71,7 +71,11 @@ class VBOTracker {
 	 * @param context
 	 */
 	static synchronized void setCurrent(Object context) {
-		current_tracker = (VBOTracker) contextToTracker.get(context);
+		if (context == null) {
+			current_tracker = null;
+			return;
+		}
+		current_tracker = (VBOTracker)contextToTracker.get(context);
 		if (current_tracker == null) {
 			current_tracker = new VBOTracker();
 			contextToTracker.put(context, current_tracker);