drawingsurfaceobject.java

JAVA3D矩陈的相关类

/*
 * $RCSfile: DrawingSurfaceObject.java,v $
 *
 * Copyright (c) 2007 Sun Microsystems, Inc. All rights reserved.
 *
 * Use is subject to license terms.
 *
 * $Revision: 1.4 $
 * $Date: 2007/02/09 17:17:58 $
 * $State: Exp $
 */

package javax.media.j3d;

/**
 * The DrawingSurfaceObject class is used to manage native drawing surface
 */

abstract class DrawingSurfaceObject extends Object {

    Canvas3D canvas;
    boolean gotDsiLock = false;
    boolean onScreen;

    abstract boolean renderLock();
    abstract void unLock();
    abstract void getDrawingSurfaceObjectInfo();
    abstract void invalidate();

    DrawingSurfaceObject(Canvas3D cv) {
        canvas = cv;
	onScreen = !cv.offScreen;
    }

    synchronized boolean isLocked() {
	return gotDsiLock;
    }

    synchronized void contextValidated() {
        canvas.validCtx = true;
    }
}