1 files changed, 150 insertions, 0 deletions
diff --git a/src/classes/com/sun/opengl/impl/GLDrawableHelper.java b/src/classes/com/sun/opengl/impl/GLDrawableHelper.java
new file mode 100644
index 000000000..014e35f7e
--- /dev/null
+++ b/src/classes/com/sun/opengl/impl/GLDrawableHelper.java
@@ -0,0 +1,150 @@
+/*
+ * 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
+ * MICROSYSTEMS, 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 com.sun.opengl.impl;
+
+import java.util.*;
+import javax.media.opengl.*;
+
+/** Encapsulates the implementation of most of the GLAutoDrawable's
+    methods to be able to share it between GLCanvas and GLJPanel. */
+
+public class GLDrawableHelper {
+  private volatile List listeners = new ArrayList();
+  private static final boolean DEBUG = Debug.debug("GLDrawableHelper");
+  private static final boolean VERBOSE = Debug.verbose();
+  private boolean autoSwapBufferMode = true;
+
+  public GLDrawableHelper() {
+  }
+
+  public synchronized void addGLEventListener(GLEventListener listener) {
+    List newListeners = (List) ((ArrayList) listeners).clone();
+    newListeners.add(listener);
+    listeners = newListeners;
+  }
+  
+  public synchronized void removeGLEventListener(GLEventListener listener) {
+    List newListeners = (List) ((ArrayList) listeners).clone();
+    newListeners.remove(listener);
+    listeners = newListeners;
+  }
+
+  public void init(GLAutoDrawable drawable) {
+    for (Iterator iter = listeners.iterator(); iter.hasNext(); ) {
+      ((GLEventListener) iter.next()).init(drawable);
+    }
+  }
+
+  public void display(GLAutoDrawable drawable) {
+    for (Iterator iter = listeners.iterator(); iter.hasNext(); ) {
+      ((GLEventListener) iter.next()).display(drawable);
+    }
+  }
+
+  public void reshape(GLAutoDrawable drawable,
+                      int x, int y, int width, int height) {
+    for (Iterator iter = listeners.iterator(); iter.hasNext(); ) {
+      ((GLEventListener) iter.next()).reshape(drawable, x, y, width, height);
+    }
+  }
+
+  public void setAutoSwapBufferMode(boolean onOrOff) {
+    autoSwapBufferMode = onOrOff;
+  }
+
+  public boolean getAutoSwapBufferMode() {
+    return autoSwapBufferMode;
+  }
+
+  private static final ThreadLocal perThreadInitAction = new ThreadLocal();
+  /** Principal helper method which runs a Runnable with the context
+      made current. This could have been made part of GLContext, but a
+      desired goal is to be able to implement the GLCanvas in terms of
+      the GLContext's public APIs, and putting it into a separate
+      class helps ensure that we don't inadvertently use private
+      methods of the GLContext or its implementing classes. */
+  public void invokeGL(GLDrawable drawable,
+                       GLContext context,
+                       Runnable  runnable,
+                       Runnable  initAction) {
+    // Support for recursive makeCurrent() calls as well as calling
+    // other drawables' display() methods from within another one's
+    GLContext lastContext    = GLContext.getCurrent();
+    Runnable  lastInitAction = (Runnable) perThreadInitAction.get();
+    if (lastContext != null) {
+      lastContext.release();
+    }
+    
+    int res = 0;
+    try {
+      res = context.makeCurrent();
+      if (res != GLContext.CONTEXT_NOT_CURRENT) {
+        if (res == GLContext.CONTEXT_CURRENT_NEW) {
+          if (DEBUG) {
+            System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running initAction");
+          }
+          initAction.run();
+        }
+        if (DEBUG && VERBOSE) {
+          System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running runnable");
+        }
+        runnable.run();
+        if (autoSwapBufferMode) {
+          if (drawable != null) {
+            drawable.swapBuffers();
+          }
+        }
+      }
+    } finally {
+      try {
+        if (res != GLContext.CONTEXT_NOT_CURRENT) {
+          context.release();
+        }
+      } catch (Exception e) {
+      }
+      if (lastContext != null) {
+        int res2 = lastContext.makeCurrent();
+        if (res2 == GLContext.CONTEXT_CURRENT_NEW) {
+          lastInitAction.run();
+        }
+      }
+    }
+  }
+}