BufImgVolatileSurfaceManager.java revision 2362
2362N/A * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 0N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2362N/A * or visit www.oracle.com if you need additional information or have any 0N/A * This SurfaceManager variant manages an unaccelerated volatile surface. 0N/A * This class is created in the event that someone requested a VolatileImage 0N/A * to be created from a BufferedImageGraphicsConfig, which is not platform- 0N/A * or hardware-based, thus the resulting surface and surface manager 0N/A * are unaccelerated. All we do in this class is implement the abstract 0N/A * methods of VolatileSurfaceManager to return values that indicate that 0N/A * we cannot accelerate surfaces through this SurfaceManager, thus the 0N/A * parent class will handle things through the unaccelerated backup mechanism. 0N/A * This constructor simply defers to the superclass since all of the real 0N/A * functionality of this class is implemented in VolatileSurfaceManager. 0N/A * Returns false to indicate that this surface manager cannot accelerate 0N/A * Returns null to indicate failure in creating the accelerated surface. 0N/A * Note that this method should not ever be called since creation of 0N/A * accelerated surfaces should be preceded by calls to the above 0N/A * isAccelerationEnabled() method. But we need to override this method 0N/A * since it is abstract in our parent class.