Java Color Contrast contrast(Color col)

Description

contrast

License

LGPL

Declaration

public static Color contrast(Color col) 

Method Source Code

//package com.java2s;
/*//from  w ww  . jav  a 2s . co  m
 *  This file is part of the Haven & Hearth game client.
 *  Copyright (C) 2009 Fredrik Tolf <fredrik@dolda2000.com>, and
 *                     Bj?rn Johannessen <johannessen.bjorn@gmail.com>
 *
 *  Redistribution and/or modification of this file is subject to the
 *  terms of the GNU Lesser General Public License, version 3, 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 for more details.
 *
 *  Other parts of this source tree adhere to other copying
 *  rights. Please see the file `COPYING' in the root directory of the
 *  source tree for details.
 *
 *  A copy the GNU Lesser General Public License is distributed along
 *  with the source tree of which this file is a part in the file
 *  `doc/LPGL-3'. If it is missing for any reason, please see the Free
 *  Software Foundation's website at <http://www.fsf.org/>, or write
 *  to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 *  Boston, MA 02111-1307 USA
 */

import java.awt.Color;

public class Main {
    public static Color contrast(Color col) {
        int max = Math.max(col.getRed(), Math.max(col.getGreen(), col.getBlue()));
        if (max > 128) {
            return (new Color(col.getRed() / 2, col.getGreen() / 2, col.getBlue() / 2, col.getAlpha()));
        } else if (max == 0) {
            return (Color.WHITE);
        } else {
            int f = 128 / max;
            return (new Color(col.getRed() * f, col.getGreen() * f, col.getBlue() * f, col.getAlpha()));
        }
    }
}

Related

1. contrast(@Nonnull Color color)
2. contrastBW(Color c)
3. contrastColorByShift(Color color, int shift)