--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.desktop/windows/classes/sun/java2d/opengl/WGLVolatileSurfaceManager.java	Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2004, 2010, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.java2d.opengl;
+
+import java.awt.BufferCapabilities;
+import static java.awt.BufferCapabilities.FlipContents.*;
+import java.awt.Component;
+import java.awt.GraphicsConfiguration;
+import java.awt.Transparency;
+import java.awt.image.ColorModel;
+import sun.awt.image.SunVolatileImage;
+import sun.awt.image.VolatileSurfaceManager;
+import sun.awt.windows.WComponentPeer;
+import sun.java2d.SurfaceData;
+import static sun.java2d.opengl.OGLContext.OGLContextCaps.*;
+import static sun.java2d.pipe.hw.AccelSurface.*;
+import sun.java2d.pipe.hw.ExtendedBufferCapabilities;
+import static sun.java2d.pipe.hw.ExtendedBufferCapabilities.VSyncType.*;
+
+public class WGLVolatileSurfaceManager
+    extends VolatileSurfaceManager
+{
+    private boolean accelerationEnabled;
+
+    public WGLVolatileSurfaceManager(SunVolatileImage vImg, Object context) {
+        super(vImg, context);
+
+        /*
+         * We will attempt to accelerate this image only under the
+         * following conditions:
+         *   - the image is opaque OR
+         *   - the image is translucent AND
+         *       - the GraphicsConfig supports the FBO extension OR
+         *       - the GraphicsConfig has a stored alpha channel
+         */
+        int transparency = vImg.getTransparency();
+        WGLGraphicsConfig gc = (WGLGraphicsConfig)vImg.getGraphicsConfig();
+        accelerationEnabled =
+            (transparency == Transparency.OPAQUE) ||
+            ((transparency == Transparency.TRANSLUCENT) &&
+             (gc.isCapPresent(CAPS_EXT_FBOBJECT) ||
+              gc.isCapPresent(CAPS_STORED_ALPHA)));
+    }
+
+    protected boolean isAccelerationEnabled() {
+        return accelerationEnabled;
+    }
+
+    /**
+     * Create a pbuffer-based SurfaceData object (or init the backbuffer
+     * of an existing window if this is a double buffered GraphicsConfig).
+     */
+    protected SurfaceData initAcceleratedSurface() {
+        SurfaceData sData;
+        Component comp = vImg.getComponent();
+        WComponentPeer peer =
+            (comp != null) ? (WComponentPeer)comp.getPeer() : null;
+
+        try {
+            boolean createVSynced = false;
+            boolean forceback = false;
+            if (context instanceof Boolean) {
+                forceback = ((Boolean)context).booleanValue();
+                if (forceback) {
+                    BufferCapabilities caps = peer.getBackBufferCaps();
+                    if (caps instanceof ExtendedBufferCapabilities) {
+                        ExtendedBufferCapabilities ebc =
+                            (ExtendedBufferCapabilities)caps;
+                        if (ebc.getVSync() == VSYNC_ON &&
+                            ebc.getFlipContents() == COPIED)
+                        {
+                            createVSynced = true;
+                            forceback = false;
+                        }
+                    }
+                }
+            }
+
+            if (forceback) {
+                // peer must be non-null in this case
+                sData = WGLSurfaceData.createData(peer, vImg, FLIP_BACKBUFFER);
+            } else {
+                WGLGraphicsConfig gc =
+                    (WGLGraphicsConfig)vImg.getGraphicsConfig();
+                ColorModel cm = gc.getColorModel(vImg.getTransparency());
+                int type = vImg.getForcedAccelSurfaceType();
+                // if acceleration type is forced (type != UNDEFINED) then
+                // use the forced type, otherwise choose one based on caps
+                if (type == OGLSurfaceData.UNDEFINED) {
+                    type = gc.isCapPresent(CAPS_EXT_FBOBJECT) ?
+                        OGLSurfaceData.FBOBJECT : OGLSurfaceData.PBUFFER;
+                }
+                if (createVSynced) {
+                    sData = WGLSurfaceData.createData(peer, vImg, type);
+                } else {
+                    sData = WGLSurfaceData.createData(gc,
+                                                      vImg.getWidth(),
+                                                      vImg.getHeight(),
+                                                      cm, vImg, type);
+                }
+            }
+        } catch (NullPointerException ex) {
+            sData = null;
+        } catch (OutOfMemoryError er) {
+            sData = null;
+        }
+
+        return sData;
+    }
+
+    @Override
+    protected boolean isConfigValid(GraphicsConfiguration gc) {
+        return ((gc == null) ||
+                ((gc instanceof WGLGraphicsConfig) &&
+                 (gc == vImg.getGraphicsConfig())));
+    }
+
+    @Override
+    public void initContents() {
+        if (vImg.getForcedAccelSurfaceType() != OGLSurfaceData.TEXTURE) {
+            super.initContents();
+        }
+    }
+}