From 8de31e2b5ddade6ffaec47964b26b4a73dd0d82d Mon Sep 17 00:00:00 2001
From: Jonathan Feinberg <jdf@pobox.com>
Date: Wed, 25 Dec 2013 22:53:05 -0500
Subject: [PATCH] Clear the global PGL on dispose().

---
 core/src/processing/opengl/PGraphicsOpenGL.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/core/src/processing/opengl/PGraphicsOpenGL.java b/core/src/processing/opengl/PGraphicsOpenGL.java
index 0cb501020..55edd5aa3 100644
--- a/core/src/processing/opengl/PGraphicsOpenGL.java
+++ b/core/src/processing/opengl/PGraphicsOpenGL.java
@@ -651,9 +651,13 @@ public class PGraphicsOpenGL extends PGraphics {
     deleteFinalizedGLResources();
 
     if (primarySurface) pgl.deleteSurface();
+    // This next line is critical to release many static allocations.
+    // This is important in the context of, say, a unit test suite, which
+    // runs more than one OpenGL sketch within the same classloader
+    // (as in the case of processing.py). Please don't remove it!
+    pgl = null;
   }
 
-//  @Override
   @Override
   protected void finalize() throws Throwable {
     try {