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/* BufferedImageOp.java --
   Copyright (C) 2002, 2006, Free Software Foundation, Inc.
 
This file is part of GNU Classpath.
 
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath 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 for more details.
 
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
 
Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
 
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */
 
 
package java.awt.image;
 
import java.awt.RenderingHints;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
 
/**
 * An operation that is performed on one <code>BufferedImage</code> (the
 * source) producing a new <code>BufferedImage</code> (the destination).
 */
public interface BufferedImageOp
{
  /**
   * Performs an operation on the source image, returning the result in a
   * <code>BufferedImage</code>.  If <code>dest</code> is <code>null</code>, a
   * new <code>BufferedImage</code> will be created by calling the
   * {@link #createCompatibleDestImage} method.  If <code>dest</code>
   * is not <code>null</code>, the result is written to <code>dest</code> then
   * returned (this avoids creating a new <code>BufferedImage</code> each
   * time this method is called).
   *
   * @param src  the source image.
   * @param dst  the destination image (<code>null</code> permitted).
   *
   * @return The filterd image.
   */
  BufferedImage filter(BufferedImage src, BufferedImage dst);
 
  /**
   * Returns the bounds of the destination image on the basis of this
   * <code>BufferedImageOp</code> being applied to the specified source image.
   *
   * @param src  the source image.
   *
   * @return The destination bounds.
   */
  Rectangle2D getBounds2D(BufferedImage src);
 
  /**
   * Returns a new <code>BufferedImage</code> that can be used by this
   * <code>BufferedImageOp</code> as the destination image when filtering
   * the specified source image.
   *
   * @param src  the source image.
   * @param dstCM  the color model for the destination image.
   *
   * @return A new image that can be used as the destination image.
   */
  BufferedImage createCompatibleDestImage(BufferedImage src, ColorModel dstCM);
 
  /**
   * Returns the point on the destination image that corresponds to the given
   * point on the source image.
   *
   * @param src  the source point.
   * @param dst  the destination point (<code>null</code> permitted).
   *
   * @return The destination point.
   */
  Point2D getPoint2D(Point2D src, Point2D dst);
 
  /**
   * Returns the rendering hints for this operation.
   *
   * @return The rendering hints.
   */
  RenderingHints getRenderingHints();
 
}