| /* |
| * Copyright (c) 2007, 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.pipe.hw; |
| |
| import java.awt.BufferCapabilities; |
| import java.awt.ImageCapabilities; |
| |
| /** |
| * Provides extended BufferStrategy capabilities, allowing to specify |
| * the type of vertical refresh synchronization for a buffer strategy. |
| * |
| * This BS capability is always page flipping because v-sync is only relevant |
| * to flipping buffer strategies. |
| * |
| * Note that asking for a v-synced BS doesn't necessarily guarantee that it will |
| * be v-synced since the vsync capability may be disabled in the driver, or |
| * there may be other restriction (like a number of v-synced buffer strategies |
| * allowed per vm). Because of this {@code createBufferStrategy} doesn't |
| * throw {@code AWTException} when a v-synced BS could not be created when |
| * requested. |
| * |
| * @see java.awt.Canvas#createBufferStrategy(int, BufferCapabilities) |
| * @see java.awt.Window#createBufferStrategy(int, BufferCapabilities) |
| */ |
| public class ExtendedBufferCapabilities extends BufferCapabilities { |
| |
| /** |
| * Type of synchronization on vertical retrace. |
| */ |
| public static enum VSyncType { |
| /** |
| * Use the default v-sync mode appropriate for given BufferStrategy |
| * and situation. |
| */ |
| VSYNC_DEFAULT(0), |
| |
| /** |
| * Synchronize flip on vertical retrace. |
| */ |
| VSYNC_ON(1), |
| |
| /** |
| * Do not synchronize flip on vertical retrace. |
| */ |
| VSYNC_OFF(2); |
| |
| /** |
| * Used to identify the v-sync type (independent of the constants |
| * order as opposed to {@code ordinal()}). |
| */ |
| public int id() { |
| return id; |
| } |
| |
| private VSyncType(int id) { |
| this.id = id; |
| } |
| private int id; |
| } |
| |
| private VSyncType vsync; |
| |
| /** |
| * Creates an ExtendedBufferCapabilities object with front/back/flip caps |
| * from the passed cap, and VSYNC_DEFAULT v-sync mode. |
| */ |
| public ExtendedBufferCapabilities(BufferCapabilities caps) { |
| super(caps.getFrontBufferCapabilities(), |
| caps.getBackBufferCapabilities(), |
| caps.getFlipContents()); |
| |
| this.vsync = VSyncType.VSYNC_DEFAULT; |
| } |
| |
| /** |
| * Creates an ExtendedBufferCapabilities instance with front/back/flip caps |
| * from the passed caps, and VSYNC_DEFAULT v-sync mode. |
| */ |
| public ExtendedBufferCapabilities(ImageCapabilities front, |
| ImageCapabilities back, FlipContents flip) |
| { |
| super(front, back, flip); |
| |
| this.vsync = VSyncType.VSYNC_DEFAULT; |
| } |
| |
| /** |
| * Creates an ExtendedBufferCapabilities instance with front/back/flip caps |
| * from the passed image/flip caps, and the v-sync type. |
| */ |
| public ExtendedBufferCapabilities(ImageCapabilities front, |
| ImageCapabilities back, FlipContents flip, |
| VSyncType t) |
| { |
| super(front, back, flip); |
| |
| this.vsync = t; |
| } |
| |
| /** |
| * Creates an ExtendedBufferCapabilities instance with front/back/flip caps |
| * from the passed cap, and the passed v-sync mode. |
| */ |
| public ExtendedBufferCapabilities(BufferCapabilities caps, VSyncType t) { |
| super(caps.getFrontBufferCapabilities(), |
| caps.getBackBufferCapabilities(), |
| caps.getFlipContents()); |
| |
| this.vsync = t; |
| } |
| |
| /** |
| * Creates an ExtendedBufferCapabilities instance with front/back/flip caps |
| * from the object, and passed v-sync mode. |
| */ |
| public ExtendedBufferCapabilities derive(VSyncType t) { |
| return new ExtendedBufferCapabilities(this, t); |
| } |
| |
| /** |
| * Returns the type of v-sync requested by this capabilities instance. |
| */ |
| public VSyncType getVSync() { |
| return vsync; |
| } |
| |
| @Override |
| public final boolean isPageFlipping() { |
| return true; |
| } |
| } |