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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 | } | ||