Derives a color from another color by linearly shifting its blue, green, and blue values. - Java 2D Graphics

Java examples for 2D Graphics:Color RGB

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Description

Derives a color from another color by linearly shifting its blue, green, and blue values.

Demo Code

/*//  w  w w. ja va  2  s  .c o  m
 * 09/08/2005
 *
 * UIUtil.java - Utility methods for org.fife.ui classes.
 * Copyright (C) 2005 Robert Futrell
 * http://fifesoft.com/rtext
 * Licensed under a modified BSD license.
 * See the included license file for details.
 */
//package com.java2s;

import java.awt.Color;

public class Main {
    /**
     * Derives a color from another color by linearly shifting its blue, green,
     * and blue values.
     *
     * @param orig The original color.
     * @param darker The amount by which to decrease its r, g, and b values.
     *        Note that you can use negative values for making a color
     *        component "brighter."  If this makes any of the three values
     *        less than zero, zero is used for that component value; similarly,
     *        if it makes any value greater than 255, 255 is used for that
     *        component's value.
     */
    public static final Color deriveColor(Color orig, int darker) {

        int red = orig.getRed() - darker;
        int green = orig.getGreen() - darker;
        int blue = orig.getBlue() - darker;

        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;

        return new Color(red, green, blue);

    }
}

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