Make a color darker. - Java 2D Graphics

Java examples for 2D Graphics:Color Dark

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Description

Make a color darker.

Demo Code

/*/*from   w  ww  .j a v  a  2  s .  c o  m*/
Storybook: Scene-based software for novelists and authors.
Copyright (C) 2008 - 2011 Martin Mustun

This program 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.

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.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.awt.Color;

public class Main {
    /**
     * Make a color darker.
     *
     * @param color
     *            Color to make darker.
     * @param fraction
     *            Darkness fraction.
     * @return Darker color.
     */
    public static Color darker(Color color, double fraction) {
        int red = (int) Math.round(color.getRed() * (1.0 - fraction));
        int green = (int) Math.round(color.getGreen() * (1.0 - fraction));
        int blue = (int) Math.round(color.getBlue() * (1.0 - fraction));

        if (red < 0)
            red = 0;
        else if (red > 255)
            red = 255;
        if (green < 0)
            green = 0;
        else if (green > 255)
            green = 255;
        if (blue < 0)
            blue = 0;
        else if (blue > 255)
            blue = 255;

        int alpha = color.getAlpha();

        return new Color(red, green, blue, alpha);
    }
}

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