--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/windows/classes/sun/java2d/d3d/D3DBackBufferSurfaceData.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2005 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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 General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.java2d.d3d;
+
+import java.awt.GraphicsConfiguration;
+import java.awt.Image;
+import java.awt.Transparency;
+import java.awt.image.ColorModel;
+import sun.awt.Win32GraphicsDevice;
+import sun.java2d.loops.SurfaceType;
+import sun.java2d.windows.Win32SurfaceData;
+
+public class D3DBackBufferSurfaceData extends D3DSurfaceData {
+
+    private Win32SurfaceData parentData;
+
+    /**
+     * Private constructor.  Use createData() to create an object.
+     */
+    private D3DBackBufferSurfaceData(int width, int height,
+                                     SurfaceType sType, ColorModel cm,
+                                     GraphicsConfiguration gc,
+                                     Image image, int screen,
+                                     Win32SurfaceData parentData)
+    {
+        super(width, height, D3DSurfaceData.D3D_ATTACHED_SURFACE,
+              sType, cm, gc, image, Transparency.OPAQUE);
+        this.parentData = parentData;
+        initSurface(width, height, screen, parentData);
+    }
+
+    private native void restoreDepthBuffer();
+
+    @Override
+    public void restoreSurface() {
+        parentData.restoreSurface();
+        // The above call restores the primary surface
+        // to which this backbuffer is attached. But
+        // we need to explicitly restore the depth buffer
+        // associated with this backbuffer surface, because it's not
+        // part of a 'complex' primary surface, and thus will not be
+        // restored as part of the primary surface restoration.
+        restoreDepthBuffer();
+    }
+
+    public static D3DBackBufferSurfaceData
+        createData(int width, int height,
+                   ColorModel cm, GraphicsConfiguration gc,
+                   Image image,
+                   Win32SurfaceData parentData)
+    {
+        Win32GraphicsDevice gd = (Win32GraphicsDevice)gc.getDevice();
+        if (!gd.isD3DEnabledOnDevice()) {
+            return null;
+        }
+        SurfaceType sType = getSurfaceType(cm, Transparency.OPAQUE);
+        return new
+            D3DBackBufferSurfaceData(width, height,
+                 getSurfaceType(gc, cm,
+                                D3DSurfaceData.D3D_ATTACHED_SURFACE),
+                 cm, gc, image,
+                 gd.getScreen(), parentData);
+    }
+}