Android Color Sum ColorSum(int color, int color2, boolean subtract)

Description

Returns the sum of one color and another.

Parameter

Parameter	Description
color	a parameter
color2	a parameter
subtract	a parameter

Declaration

public static int ColorSum(int color, int color2, boolean subtract) 

Method Source Code

//package com.java2s;

public class Main {
    /**//ww w .j  a  v a  2  s . c o  m
     * Returns the sum of the two provided colors.
     *
     * @param color
     * @param color2
     * @return
     */
    public static int ColorSum(int color, int color2) {
        return ColorSum(color, color2, false);
    }

    /**
     * Returns the sum of one color and another. If indicated by the subtract param, will return the
     * difference of the first color and the second instead, with a floor on each color part of 0, and
     * a ceiling of 255.
     *
     * @param color
     * @param color2
     * @param subtract
     * @return
     */
    public static int ColorSum(int color, int color2, boolean subtract) {
        final int a = (color >>> 24);
        final int r = (color >> 16) & 0xFF;
        final int g = (color >> 8) & 0xFF;
        final int b = (color) & 0xFF;

        final int a2 = (subtract) ? -(color2 >>> 24) : (color2 >>> 24);
        final int r2 = (subtract) ? -((color2 >> 16) & 0xFF)
                : ((color2 >> 16) & 0xFF);
        final int g2 = (subtract) ? -((color2 >> 8) & 0xFF)
                : ((color2 >> 8) & 0xFF);
        final int b2 = (subtract) ? -((color2) & 0xFF) : ((color2) & 0xFF);

        return (ClippedColorPart(a + a2) << 24)
                + (ClippedColorPart(r + r2) << 16)
                + (ClippedColorPart(g + g2) << 8)
                + (ClippedColorPart(b + b2));
    }

    public static int ClippedColorPart(int color) {
        if (color < 0) {
            return 0;
        } else if (color > 0xFF) {
            return 0xFF;
        }
        return color;
    }
}

Related

1. ColorSum(int color, int color2)