--- a/jdk/src/share/classes/java/awt/peer/WindowPeer.java	Wed Feb 04 11:58:13 2009 +0300
+++ b/jdk/src/share/classes/java/awt/peer/WindowPeer.java	Wed Feb 11 17:07:06 2009 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2007 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1995-2009 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,6 +27,8 @@
 
 import java.awt.*;
 
+import java.awt.image.BufferedImage;
+
 /**
  * The peer interface for {@link Window}.
  *
@@ -92,4 +94,26 @@
      * @see Window#setIconImages(java.util.List)
      */
     void updateIconImages();
+
+    /**
+     * Sets the level of opacity for the window.
+     *
+     * @see Window#setOpacity(float)
+     */
+    void setOpacity(float opacity);
+
+    /**
+     * Enables the per-pixel alpha support for the window.
+     *
+     * @see Window#setBackground(Color)
+     */
+    void setOpaque(boolean isOpaque);
+
+    /**
+     * Updates the native part of non-opaque window using
+     * the given image with color+alpha values for each pixel.
+     *
+     * @see Window#setBackground(Color)
+     */
+    void updateWindow(BufferedImage backBuffer);
 }