cleanup changes

core/src/processing/opengl/PSurfaceJOGL.java

@@ -1,3 +1,29 @@
+/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */
+
+/*
+  Processing OpenGL (c) 2011-2015 Andres Colubri
+
+  Part of the Processing project - http://processing.org
+  Copyright (c) 2001-04 Massachusetts Institute of Technology
+  Copyright (c) 2004-12 Ben Fry and Casey Reas
+  Copyright (c) 2012-15 The Processing Foundation
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General
+  Public License along with this library; if not, write to the
+  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+  Boston, MA  02111-1307  USA
+*/
+
 package processing.opengl;
 
 import java.awt.Component;
@@ -695,8 +721,10 @@ public class PSurfaceJOGL implements PSurface {
       int pframeCount = sketch.frameCount;
       sketch.handleDraw();
       if (pframeCount == sketch.frameCount) {
-        pgl.beginDraw(false);
-        pgl.endDraw(false, sketch.sketchWindowColor());
+        // This hack allows the FBO layer to be swapped normally even if
+        // the sketch is no looping, otherwise background artifacts will occur.
+        pgl.beginRender(false);
+        pgl.endRender(false, sketch.sketchWindowColor());
       }
 
       if (sketch.frameCount == 1) {