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| 1 | +/* | |
| 2 | + * Copyright (c) 2007, 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.pipe.hw; | |
| 27 | + | |
| 28 | +import java.awt.BufferCapabilities; | |
| 29 | +import java.awt.ImageCapabilities; | |
| 30 | + | |
| 31 | +/** | |
| 32 | + * Provides extended BufferStrategy capabilities, allowing to specify | |
| 33 | + * the type of vertical refresh synchronization for a buffer strategy. | |
| 34 | + * | |
| 35 | + * This BS capability is always page flipping because v-sync is only relevant | |
| 36 | + * to flipping buffer strategies. | |
| 37 | + * | |
| 38 | + * Note that asking for a v-synced BS doesn't necessarily guarantee that it will | |
| 39 | + * be v-synced since the vsync capability may be disabled in the driver, or | |
| 40 | + * there may be other restriction (like a number of v-synced buffer strategies | |
| 41 | + * allowed per vm). Because of this {@code createBufferStrategy} doesn't | |
| 42 | + * throw {@code AWTException} when a v-synced BS could not be created when | |
| 43 | + * requested. | |
| 44 | + * | |
| 45 | + * @see java.awt.Canvas#createBufferStrategy(int, BufferCapabilities) | |
| 46 | + * @see java.awt.Window#createBufferStrategy(int, BufferCapabilities) | |
| 47 | + */ | |
| 48 | +public class ExtendedBufferCapabilities extends BufferCapabilities { | |
| 49 | + | |
| 50 | + /** | |
| 51 | + * Type of synchronization on vertical retrace. | |
| 52 | + */ | |
| 53 | + public static enum VSyncType { | |
| 54 | + /** | |
| 55 | + * Use the default v-sync mode appropriate for given BufferStrategy | |
| 56 | + * and situation. | |
| 57 | + */ | |
| 58 | + VSYNC_DEFAULT(0), | |
| 59 | + | |
| 60 | + /** | |
| 61 | + * Synchronize flip on vertical retrace. | |
| 62 | + */ | |
| 63 | + VSYNC_ON(1), | |
| 64 | + | |
| 65 | + /** | |
| 66 | + * Do not synchronize flip on vertical retrace. | |
| 67 | + */ | |
| 68 | + VSYNC_OFF(2); | |
| 69 | + | |
| 70 | + /** | |
| 71 | + * Used to identify the v-sync type (independent of the constants | |
| 72 | + * order as opposed to {@code ordinal()}). | |
| 73 | + */ | |
| 74 | + public int id() { | |
| 75 | + return id; | |
| 76 | + } | |
| 77 | + | |
| 78 | + private VSyncType(int id) { | |
| 79 | + this.id = id; | |
| 80 | + } | |
| 81 | + private int id; | |
| 82 | + } | |
| 83 | + | |
| 84 | + private VSyncType vsync; | |
| 85 | + | |
| 86 | + /** | |
| 87 | + * Creates an ExtendedBufferCapabilities object with front/back/flip caps | |
| 88 | + * from the passed cap, and VSYNC_DEFAULT v-sync mode. | |
| 89 | + */ | |
| 90 | + public ExtendedBufferCapabilities(BufferCapabilities caps) { | |
| 91 | + super(caps.getFrontBufferCapabilities(), | |
| 92 | + caps.getBackBufferCapabilities(), | |
| 93 | + caps.getFlipContents()); | |
| 94 | + | |
| 95 | + this.vsync = VSyncType.VSYNC_DEFAULT; | |
| 96 | + } | |
| 97 | + | |
| 98 | + /** | |
| 99 | + * Creates an ExtendedBufferCapabilities instance with front/back/flip caps | |
| 100 | + * from the passed caps, and VSYNC_DEFAULT v-sync mode. | |
| 101 | + */ | |
| 102 | + public ExtendedBufferCapabilities(ImageCapabilities front, | |
| 103 | + ImageCapabilities back, FlipContents flip) | |
| 104 | + { | |
| 105 | + super(front, back, flip); | |
| 106 | + | |
| 107 | + this.vsync = VSyncType.VSYNC_DEFAULT; | |
| 108 | + } | |
| 109 | + | |
| 110 | + /** | |
| 111 | + * Creates an ExtendedBufferCapabilities instance with front/back/flip caps | |
| 112 | + * from the passed image/flip caps, and the v-sync type. | |
| 113 | + */ | |
| 114 | + public ExtendedBufferCapabilities(ImageCapabilities front, | |
| 115 | + ImageCapabilities back, FlipContents flip, | |
| 116 | + VSyncType t) | |
| 117 | + { | |
| 118 | + super(front, back, flip); | |
| 119 | + | |
| 120 | + this.vsync = t; | |
| 121 | + } | |
| 122 | + | |
| 123 | + /** | |
| 124 | + * Creates an ExtendedBufferCapabilities instance with front/back/flip caps | |
| 125 | + * from the passed cap, and the passed v-sync mode. | |
| 126 | + */ | |
| 127 | + public ExtendedBufferCapabilities(BufferCapabilities caps, VSyncType t) { | |
| 128 | + super(caps.getFrontBufferCapabilities(), | |
| 129 | + caps.getBackBufferCapabilities(), | |
| 130 | + caps.getFlipContents()); | |
| 131 | + | |
| 132 | + this.vsync = t; | |
| 133 | + } | |
| 134 | + | |
| 135 | + /** | |
| 136 | + * Creates an ExtendedBufferCapabilities instance with front/back/flip caps | |
| 137 | + * from the object, and passed v-sync mode. | |
| 138 | + */ | |
| 139 | + public ExtendedBufferCapabilities derive(VSyncType t) { | |
| 140 | + return new ExtendedBufferCapabilities(this, t); | |
| 141 | + } | |
| 142 | + | |
| 143 | + /** | |
| 144 | + * Returns the type of v-sync requested by this capabilities instance. | |
| 145 | + */ | |
| 146 | + public VSyncType getVSync() { | |
| 147 | + return vsync; | |
| 148 | + } | |
| 149 | + | |
| 150 | + @Override | |
| 151 | + public final boolean isPageFlipping() { | |
| 152 | + return true; | |
| 153 | + } | |
| 154 | +} | |