imagecapabilities.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 83 行

/*
 * @(#)ImageCapabilities.java	1.4 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program 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. 
 * 
 * This program 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 at /legal/license.txt). 
 * 
 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 */

package java.awt;

/**
 * Capabilities and properties of images.
 * @author Michael Martak
 * @since 1.4
 */
public class ImageCapabilities implements Cloneable {
    
    private boolean accelerated = false;
    
    /**
     * Creates a new object for specifying image capabilities.
     * @param accelerated whether or not an accelerated image is desired
     */
    public ImageCapabilities(boolean accelerated) {
        this.accelerated = accelerated;
    }
    
    /**
     * Returns <code>true</code> if the object whose capabilities are
     * encapsulated in this <code>ImageCapabilities</code> can be or is
     * accelerated. 
     * @return whether or not an image can be, or is, accelerated.  There are
     * various platform-specific ways to accelerate an image, including
     * pixmaps, VRAM, AGP.  This is the general acceleration method (as
     * opposed to residing in system memory).
     */
    public boolean isAccelerated() {
        return accelerated;
    }
    
    /**
     * Returns <code>true</code> if the <code>VolatileImage</code>
     * described by this <code>ImageCapabilities</code> can lose
     * its surfaces.
     * @return whether or not a volatile image is subject to losing its surfaces
     * at the whim of the operating system.
     */
    public boolean isTrueVolatile() {
        return false;
    }

    /**
     * @return a copy of this ImageCapabilities object.
     */
    public Object clone() {
        try {
            return super.clone();
        } catch (CloneNotSupportedException e) {
            // Since we implement Cloneable, this should never happen
            throw new InternalError();
        }
    }

}