| /* |
| * Copyright (c) 2003, 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.awt.image; |
| |
| import sun.java2d.SurfaceData; |
| |
| /** |
| * This SurfaceManager variant manages an unaccelerated volatile surface. |
| * This class is created in the event that someone requested a VolatileImage |
| * to be created from a BufferedImageGraphicsConfig, which is not platform- |
| * or hardware-based, thus the resulting surface and surface manager |
| * are unaccelerated. All we do in this class is implement the abstract |
| * methods of VolatileSurfaceManager to return values that indicate that |
| * we cannot accelerate surfaces through this SurfaceManager, thus the |
| * parent class will handle things through the unaccelerated backup mechanism. |
| */ |
| public class BufImgVolatileSurfaceManager extends VolatileSurfaceManager { |
| |
| /** |
| * This constructor simply defers to the superclass since all of the real |
| * functionality of this class is implemented in VolatileSurfaceManager. |
| */ |
| public BufImgVolatileSurfaceManager(SunVolatileImage vImg, Object context) { |
| super(vImg, context); |
| } |
| |
| /** |
| * Returns false to indicate that this surface manager cannot accelerate |
| * the image. |
| */ |
| protected boolean isAccelerationEnabled() { |
| return false; |
| } |
| |
| /** |
| * Returns null to indicate failure in creating the accelerated surface. |
| * Note that this method should not ever be called since creation of |
| * accelerated surfaces should be preceded by calls to the above |
| * isAccelerationEnabled() method. But we need to override this method |
| * since it is abstract in our parent class. |
| */ |
| protected SurfaceData initAcceleratedSurface() { |
| return null; |
| } |
| } |