Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import android.graphics.Color;

public class Main {
    /**
     * Composite two potentially translucent colors over each other and returns the result.
     */
    public static int compositeColors(int fg, int bg) {
        final float alpha1 = Color.alpha(fg) / 255f;
        final float alpha2 = Color.alpha(bg) / 255f;

        float a = (alpha1 + alpha2) * (1f - alpha1);
        float r = (Color.red(fg) * alpha1) + (Color.red(bg) * alpha2 * (1f - alpha1));
        float g = (Color.green(fg) * alpha1) + (Color.green(bg) * alpha2 * (1f - alpha1));
        float b = (Color.blue(fg) * alpha1) + (Color.blue(bg) * alpha2 * (1f - alpha1));

        return Color.argb((int) a, (int) r, (int) g, (int) b);
    }
}