HSB Color to RGB - Java 2D Graphics

Java examples for 2D Graphics:Color RGB

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Description

HSB Color to RGB

Demo Code

/** Copyright 2013/*from   w  w  w.j  a  va 2 s. c om*/
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        float hue = 2.45678f;
        float saturation = 2.45678f;
        float brightness = 2.45678f;
        System.out.println(HSBtoRGB(hue, saturation, brightness));
    }

    public static int HSBtoRGB(float hue, float saturation, float brightness) {
        int _r = 0, _g = 0, _b = 0;
        if (saturation == 0) {
            _r = _g = _b = (int) (brightness * 255.0f + 0.5f);
        } else {
            float _h = (hue - (float) Math.floor(hue)) * 6.0f;
            float _f = _h - (float) Math.floor(_h);
            float _p = brightness * (1.0f - saturation);
            float _q = brightness * (1.0f - saturation * _f);
            float _t = brightness * (1.0f - (saturation * (1.0f - _f)));
            switch ((int) _h) {
            case 0:
                _r = (int) (brightness * 255.0f + 0.5f);
                _g = (int) (_t * 255.0f + 0.5f);
                _b = (int) (_p * 255.0f + 0.5f);
                break;
            case 1:
                _r = (int) (_q * 255.0f + 0.5f);
                _g = (int) (brightness * 255.0f + 0.5f);
                _b = (int) (_p * 255.0f + 0.5f);
                break;
            case 2:
                _r = (int) (_p * 255.0f + 0.5f);
                _g = (int) (brightness * 255.0f + 0.5f);
                _b = (int) (_t * 255.0f + 0.5f);
                break;
            case 3:
                _r = (int) (_p * 255.0f + 0.5f);
                _g = (int) (_q * 255.0f + 0.5f);
                _b = (int) (brightness * 255.0f + 0.5f);
                break;
            case 4:
                _r = (int) (_t * 255.0f + 0.5f);
                _g = (int) (_p * 255.0f + 0.5f);
                _b = (int) (brightness * 255.0f + 0.5f);
                break;
            case 5:
                _r = (int) (brightness * 255.0f + 0.5f);
                _g = (int) (_p * 255.0f + 0.5f);
                _b = (int) (_q * 255.0f + 0.5f);
                break;
            }
        }
        return 0xff000000 | (_r << 16) | (_g << 8) | (_b << 0);
    }
}

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