| /* |
| * Copyright (c) 2003, 2008, 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; |
| |
| import sun.awt.image.SunVolatileImage; |
| import sun.awt.image.VolatileSurfaceManager; |
| |
| /** |
| * This factory creates platform specific VolatileSurfaceManager |
| * implementations. |
| * |
| * There are two platform specific SurfaceManagerFactories in OpenJDK, |
| * UnixSurfaceManagerFactory and WindowsSurfaceManagerFactory. |
| * The actually used SurfaceManagerFactory is set by the respective platform |
| * GraphicsEnvironment implementations in the static initializer. |
| */ |
| public abstract class SurfaceManagerFactory { |
| |
| /** |
| * The single shared instance. |
| */ |
| private static SurfaceManagerFactory instance; |
| |
| /** |
| * Returns the surface manager factory instance. This returns a factory |
| * that has been set by {@link #setInstance(SurfaceManagerFactory)}. |
| * |
| * @return the surface manager factory |
| */ |
| public synchronized static SurfaceManagerFactory getInstance() { |
| |
| if (instance == null) { |
| throw new IllegalStateException("No SurfaceManagerFactory set."); |
| } |
| return instance; |
| } |
| |
| /** |
| * Sets the surface manager factory. This may only be called once, and it |
| * may not be set back to {@code null} when the factory is already |
| * instantiated. |
| * |
| * @param factory the factory to set |
| */ |
| public synchronized static void setInstance(SurfaceManagerFactory factory) { |
| |
| if (factory == null) { |
| // We don't want to allow setting this to null at any time. |
| throw new IllegalArgumentException("factory must be non-null"); |
| } |
| |
| if (instance != null) { |
| // We don't want to re-set the instance at any time. |
| throw new IllegalStateException("The surface manager factory is already initialized"); |
| } |
| |
| instance = factory; |
| } |
| |
| /** |
| * Creates a new instance of a VolatileSurfaceManager given any |
| * arbitrary SunVolatileImage. An optional context Object can be supplied |
| * as a way for the caller to pass pipeline-specific context data to |
| * the VolatileSurfaceManager (such as a backbuffer handle, for example). |
| */ |
| public abstract VolatileSurfaceManager |
| createVolatileManager(SunVolatileImage image, Object context); |
| } |