JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2003, 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
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 */

package sun.java2d;

import java.awt.GraphicsConfiguration;
import sun.awt.image.BufImgVolatileSurfaceManager;
import sun.awt.image.SunVolatileImage;
import sun.awt.image.VolatileSurfaceManager;
import sun.java2d.d3d.D3DGraphicsConfig;
import sun.java2d.d3d.D3DVolatileSurfaceManager;
import sun.java2d.opengl.WGLGraphicsConfig;
import sun.java2d.opengl.WGLVolatileSurfaceManager;

/**
 * The SurfaceManagerFactory that creates VolatileSurfaceManager
 * implementations for the Windows volatile images.
 */
public class WindowsSurfaceManagerFactory extends SurfaceManagerFactory {

    /**
     * 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).
     *
     * For Windows platforms, this method returns a Windows-specific
     * VolatileSurfaceManager.
     */
    public VolatileSurfaceManager createVolatileManager(SunVolatileImage vImg,
                                                        Object context)
    {
        GraphicsConfiguration gc = vImg.getGraphicsConfig();
        if (gc instanceof D3DGraphicsConfig) {

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