Here you can find the source of rgbToHsl(int red, int green, int blue)
| Parameter | Description |
|---|---|
| red | the red value [0,255] |
| green | the green value [0,255] |
| blue | the blue value [0,255] |
public static float[] rgbToHsl(int red, int green, int blue)
//package com.java2s; /*// www . ja v a2s. c o m * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 2015 Oracle and/or its affiliates. All rights reserved. * * Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common * Development and Distribution License("CDDL") (collectively, the * "License"). You may not use this file except in compliance with the * License. You can obtain a copy of the License at * http://www.netbeans.org/cddl-gplv2.html * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the * specific language governing permissions and limitations under the * License. When distributing the software, include this License Header * Notice in each file and include the License file at * nbbuild/licenses/CDDL-GPL-2-CP. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the GPL Version 2 section of the License file that * accompanied this code. If applicable, add the following below the * License Header, with the fields enclosed by brackets [] replaced by * your own identifying information: * "Portions Copyrighted [year] [name of copyright owner]" * * If you wish your version of this file to be governed by only the CDDL * or only the GPL Version 2, indicate your decision by adding * "[Contributor] elects to include this software in this distribution * under the [CDDL or GPL Version 2] license." If you do not indicate a * single choice of license, a recipient has the option to distribute * your version of this file under either the CDDL, the GPL Version 2 or * to extend the choice of license to its licensees as provided above. * However, if you add GPL Version 2 code and therefore, elected the GPL * Version 2 license, then the option applies only if the new code is * made subject to such option by the copyright holder. * * Contributor(s): * * Portions Copyrighted 2015 Sun Microsystems, Inc. */ public class Main { /** * RGB to HSL * * @param red the red value [0,255] * @param green the green value [0,255] * @param blue the blue value [0,255] * @return HSL values as an array. h:[0,360], s:[0,1], l[0,1] */ public static float[] rgbToHsl(int red, int green, int blue) { float r = (float) red / 255.0f; float g = (float) green / 255.0f; float b = (float) blue / 255.0f; float max = Math.max(r, Math.max(g, b)); float min = Math.min(r, Math.min(g, b)); float d = max - min; float l = (max + min) / 2.0f; float h; float s; if (max == min) { h = s = 0.0f; } else { if (max == r) { h = 60.0f * (((g - b) / d) % 6.0f); if (h < 0) { h += 360.0f; } } else if (max == g) { h = 60.0f * (((b - r) / d) + 2.0f); } else { h = 60.0f * (((r - g) / d) + 4.0f); } s = l < 0.5f ? d / (max + min) : d / (2.0f - max - min); } return new float[] { h, s, l }; } }