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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
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       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
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package org.apache.batik.ext.awt.image.renderable;

import java.util.List;

import org.apache.batik.ext.awt.image.ARGBChannel;

Implements a DisplacementMap operation, which takes pixel values from
another image to spatially displace the input image
Author:
Sheng Pei
Version:
$Id: DisplacementMapRable.java 1733416 2016-03-03 07:07:13Z gadams $/**
 * Implements a DisplacementMap operation, which takes pixel values from
 * another image to spatially displace the input image
 *
 * @author <a href="mailto:sheng.pei@eng.sun.com">Sheng Pei</a>
 * @version $Id: DisplacementMapRable.java 1733416 2016-03-03 07:07:13Z gadams $
 */
public interface DisplacementMapRable extends FilterColorInterpolation {

    int CHANNEL_R = 1;
    int CHANNEL_G = 2;
    int CHANNEL_B = 3;
    int CHANNEL_A = 4;

    
The sources to be used in the displacement operation
The source at index 0 is displacement by the channels
in source at index 1 defined by the xChannelSelector
and the yChannelSelector. The displacement amount is
defined by the scale attribute.
Params:
srcs – The list of images used in the operation./**
     * The sources to be used in the displacement operation
     * The source at index 0 is displacement by the channels
     * in source at index 1 defined by the xChannelSelector
     * and the yChannelSelector. The displacement amount is
     * defined by the scale attribute.
     *
     * @param srcs The list of images used in the operation.
     */
    void setSources(List srcs);

    
The displacement scale factor
Params:
scale – can be any number./**
     * The displacement scale factor
     * @param scale can be any number.
     */
    void setScale(double scale);

    
Returns the displacement scale factor
/**
     * Returns the displacement scale factor
     */
    double getScale();

    
Select which component values will be used
for displacement along the X axis
Params:
xChannelSelector – value is among R,
G, B and A./**
     * Select which component values will be used
     * for displacement along the X axis
     * @param xChannelSelector value is among R,
     * G, B and A.
     */
    void setXChannelSelector(ARGBChannel xChannelSelector);

    
Returns the xChannelSelector
/**
     * Returns the xChannelSelector
     */
    ARGBChannel getXChannelSelector();

    
Select which component values will be used
for displacement along the Y axis
Params:
yChannelSelector – value is among R,
G, B and A./**
     * Select which component values will be used
     * for displacement along the Y axis
     * @param yChannelSelector value is among R,
     * G, B and A.
     */
    void setYChannelSelector(ARGBChannel yChannelSelector);

    
Returns the yChannelSelector
/**
     * Returns the yChannelSelector
     */
    ARGBChannel getYChannelSelector();

}