diff -r 0aaf0da3931d -r 800259d3792b jdk/src/share/classes/sun/java2d/SurfaceManagerFactory.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jdk/src/share/classes/sun/java2d/SurfaceManagerFactory.java Wed May 14 16:05:07 2008 -0700 @@ -0,0 +1,91 @@ +/* + * Copyright 2003-2008 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; + +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); +}