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+/*
+ * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * - Redistribution of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistribution in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ *
+ * Sun gratefully acknowledges that this software was originally authored
+ * and developed by Kenneth Bradley Russell and Christopher John Kline.
+ */
+
+package net.java.games.jogl.impl;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+/** Encapsulates the workaround of running all display operations on
+ the AWT event queue thread for the purposes of working around
+ problems seen primarily on ATI cards when rendering into a surface
+ that is simultaneously being resized by the event queue thread */
+
+public class SingleThreadedWorkaround {
+ private static boolean ATI_WORKAROUND = false;
+ // If the user specified the workaround's system property (either
+ // true or false), don't let the automatic detection have any effect
+ private static boolean systemPropertySpecified = false;
+
+ static {
+ AccessController.doPrivileged(new PrivilegedAction() {
+ public Object run() {
+ String workaround = System.getProperty("ATI_WORKAROUND");
+ if (workaround != null) {
+ systemPropertySpecified = true;
+ ATI_WORKAROUND = Boolean.valueOf(workaround).booleanValue();
+ }
+ printWorkaroundNotice();
+ return null;
+ }
+ });
+ }
+
+ public static void shouldDoWorkaround() {
+ if (!systemPropertySpecified) {
+ ATI_WORKAROUND = true;
+ printWorkaroundNotice();
+ }
+ }
+
+ public static boolean doWorkaround() {
+ return ATI_WORKAROUND;
+ }
+
+ private static void printWorkaroundNotice() {
+ if (ATI_WORKAROUND) {
+ System.err.println("Using ATI workaround of dispatching display() on event thread");
+ }
+ }
+}