/*
 * $Id: AbstractFilter.java,v 1.1 2006/11/05 15:40:51 gfx Exp $
 *
 * Dual-licensed under LGPL (Sun and Romain Guy) and BSD (Romain Guy).
 *
 * Copyright 2005 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * Copyright (c) 2006 Romain Guy <romain.guy@mac.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <romain.guy@mac.com>
 */

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;
    }
}