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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package sun.java2d; | |
| 27 | + | |
| 28 | +import sun.awt.image.SunVolatileImage; | |
| 29 | +import sun.awt.image.VolatileSurfaceManager; | |
| 30 | + | |
| 31 | +/** | |
| 32 | + * This factory creates platform specific VolatileSurfaceManager | |
| 33 | + * implementations. | |
| 34 | + * | |
| 35 | + * There are two platform specific SurfaceManagerFactories in OpenJDK, | |
| 36 | + * UnixSurfaceManagerFactory and WindowsSurfaceManagerFactory. | |
| 37 | + * The actually used SurfaceManagerFactory is set by the respective platform | |
| 38 | + * GraphicsEnvironment implementations in the static initializer. | |
| 39 | + */ | |
| 40 | +public abstract class SurfaceManagerFactory { | |
| 41 | + | |
| 42 | + /** | |
| 43 | + * The single shared instance. | |
| 44 | + */ | |
| 45 | + private static SurfaceManagerFactory instance; | |
| 46 | + | |
| 47 | + /** | |
| 48 | + * Returns the surface manager factory instance. This returns a factory | |
| 49 | + * that has been set by {@link #setInstance(SurfaceManagerFactory)}. | |
| 50 | + * | |
| 51 | + * @return the surface manager factory | |
| 52 | + */ | |
| 53 | + public synchronized static SurfaceManagerFactory getInstance() { | |
| 54 | + | |
| 55 | + if (instance == null) { | |
| 56 | + throw new IllegalStateException("No SurfaceManagerFactory set."); | |
| 57 | + } | |
| 58 | + return instance; | |
| 59 | + } | |
| 60 | + | |
| 61 | + /** | |
| 62 | + * Sets the surface manager factory. This may only be called once, and it | |
| 63 | + * may not be set back to {@code null} when the factory is already | |
| 64 | + * instantiated. | |
| 65 | + * | |
| 66 | + * @param factory the factory to set | |
| 67 | + */ | |
| 68 | + public synchronized static void setInstance(SurfaceManagerFactory factory) { | |
| 69 | + | |
| 70 | + if (factory == null) { | |
| 71 | + // We don't want to allow setting this to null at any time. | |
| 72 | + throw new IllegalArgumentException("factory must be non-null"); | |
| 73 | + } | |
| 74 | + | |
| 75 | + if (instance != null) { | |
| 76 | + // We don't want to re-set the instance at any time. | |
| 77 | + throw new IllegalStateException("The surface manager factory is already initialized"); | |
| 78 | + } | |
| 79 | + | |
| 80 | + instance = factory; | |
| 81 | + } | |
| 82 | + | |
| 83 | + /** | |
| 84 | + * Creates a new instance of a VolatileSurfaceManager given any | |
| 85 | + * arbitrary SunVolatileImage. An optional context Object can be supplied | |
| 86 | + * as a way for the caller to pass pipeline-specific context data to | |
| 87 | + * the VolatileSurfaceManager (such as a backbuffer handle, for example). | |
| 88 | + */ | |
| 89 | + public abstract VolatileSurfaceManager | |
| 90 | + createVolatileManager(SunVolatileImage image, Object context); | |
| 91 | +} | |