abstractfilter.java

JAVA图形特效,详细介绍SWING等的效果开发

/*
 * Copyright (c) 2007, Romain Guy
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of the TimingFramework project nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ColorModel;

/**
 * <p>Provides an abstract implementation of the <code>BufferedImageOp</code>
 * interface. This class can be used to created new image filters based
 * on <code>BufferedImageOp</code>.</p>
 *
 * @author Romain Guy <[e-mail]>
 */

public abstract class AbstractFilter implements BufferedImageOp {
    public abstract BufferedImage filter(BufferedImage src, BufferedImage dest);

    /**
     * {@inheritDoc}
     */
    public Rectangle2D getBounds2D(BufferedImage src) {
        return new Rectangle(0, 0, src.getWidth(), src.getHeight());
    }

    /**
     * {@inheritDoc}
     */
    public BufferedImage createCompatibleDestImage(BufferedImage src,
                                                   ColorModel destCM) {
        if (destCM == null) {
            destCM = src.getColorModel();
        }

        return new BufferedImage(destCM,
                                 destCM.createCompatibleWritableRaster(
                                         src.getWidth(), src.getHeight()),
                                 destCM.isAlphaPremultiplied(), null);
    }

    /**
     * {@inheritDoc}
     */
    public Point2D getPoint2D(Point2D srcPt, Point2D dstPt) {
        return (Point2D) srcPt.clone();
    }

    /**
     * {@inheritDoc}
     */
    public RenderingHints getRenderingHints() {
        return null;
    }
}