ColorMixer.java

package com.byoutline.kickmaterial.utils;

public final class ColorMixer {
    public static int mixTwoColors(int color1, int color2, float amount) {
        final byte ALPHA_CHANNEL = 24;
        final byte RED_CHANNEL = 16;
        final byte GREEN_CHANNEL = 8;
        final byte BLUE_CHANNEL = 0;

        final float inverseAmount = 1.0f - amount;

        int a = ((int) (((float) (color1 >> ALPHA_CHANNEL & 0xff) * amount) +
                ((float) (color2 >> ALPHA_CHANNEL & 0xff) * inverseAmount))) & 0xff;
        int r = ((int) (((float) (color1 >> RED_CHANNEL & 0xff) * amount) +
                ((float) (color2 >> RED_CHANNEL & 0xff) * inverseAmount))) & 0xff;
        int g = ((int) (((float) (color1 >> GREEN_CHANNEL & 0xff) * amount) +
                ((float) (color2 >> GREEN_CHANNEL & 0xff) * inverseAmount))) & 0xff;
        int b = ((int) (((float) (color1 & 0xff) * amount) +
                ((float) (color2 & 0xff) * inverseAmount))) & 0xff;

        return a << ALPHA_CHANNEL | r << RED_CHANNEL | g << GREEN_CHANNEL | b << BLUE_CHANNEL;
    }
}