adjust Color Towards by amount - Java 2D Graphics

Java examples for 2D Graphics:Color

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Description

adjust Color Towards by amount

Demo Code

/*/*from   w  w w  .ja v  a  2 s  .c om*/
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//package com.java2s;

import java.awt.*;

public class Main {
    public static Color adjustTowards(Color toAdjust, int amount,
            Color towards) {
        int r = toAdjust.getRed();
        int g = toAdjust.getGreen();
        int b = toAdjust.getBlue();
        int factor = isBrighter(towards, toAdjust) ? 1 : -1;
        r = minMax(r + (factor * amount));
        g = minMax(g + (factor * amount));
        b = minMax(b + (factor * amount));
        return new Color(r, g, b);
    }

    public static boolean isBrighter(Color a, Color b) {
        int[] ac = new int[] { a.getRed(), a.getGreen(), a.getBlue() };
        int[] bc = new int[] { b.getRed(), b.getGreen(), b.getBlue() };
        int dif = 0;

        for (int i = 0; i < 3; i++) {
            int currDif = ac[i] - bc[i];
            if (Math.abs(currDif) > Math.abs(dif)) {
                dif = currDif;
            }
        }
        return dif > 0;
    }

    private static int minMax(int i) {
        if (i < 0) {
            return 0;
        } else if (i > 255) {
            return 255;
        } else {
            return i;
        }
    }

    /**
     * Rotates a float value around 0-1
     */
    private static float minMax(float f) {
        return Math.max(0, Math.min(1, f));
    }
}

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