Java Color Invert invert(Color c)

Description

invert

License

Open Source License

Declaration

public static Color invert(Color c) 

Method Source Code

//package com.java2s;
/**/*from w ww.ja v a 2 s.c om*/
 * OrbisGIS is a GIS application dedicated to scientific spatial simulation.
 * This cross-platform GIS is developed at French IRSTV institute and is able to
 * manipulate and create vector and raster spatial information.
 *
 * OrbisGIS is distributed under GPL 3 license. It is produced by the "Atelier SIG"
 * team of the IRSTV Institute <http://www.irstv.fr/> CNRS FR 2488.
 *
 * Copyright (C) 2007-2012 IRSTV (FR CNRS 2488)
 *
 * This file is part of OrbisGIS.
 *
 * OrbisGIS 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 3 of the License, or (at your option) any later
 * version.
 *
 * OrbisGIS 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
 * OrbisGIS. If not, see <http://www.gnu.org/licenses/>.
 *
 * For more information, please consult: <http://www.orbisgis.org/>
 * or contact directly:
 * info_at_ orbisgis.org
 */

import java.awt.Color;

public class Main {
    /**
     * The greatest possible value foa a RGB component.
     */
    public static final int MAX_RGB_VALUE = 255;

    public static Color invert(Color c) {
        //  TODO : improve
        int a = c.getAlpha();
        int r = MAX_RGB_VALUE - c.getRed();
        int g = MAX_RGB_VALUE - c.getGreen();
        int b = MAX_RGB_VALUE - c.getBlue();

        // if the resulting color is to light (e.g. initial color is black, resulting color is white...)
        if ((r + g + b > 740) || (r + g + b < 20)) {
            // return a standard yellow
            return new Color(MAX_RGB_VALUE, MAX_RGB_VALUE, 40, a);
        } else {
            return new Color(r, g, b, a);
        }
    }
}

Related

1. invert(Color color)
2. invert(Color color)
3. invert(Color color)
4. invert(Color colour)