1 /*
2 * Copyright 2011 Király Attila
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package com.github.cage.image;
17
18 import java.awt.Color;
19 import java.util.Random;
20
21 import com.github.cage.IGenerator;
22
23 /**
24 * Random RGB {@link Color} object generator. The returned {@link Color}-s are
25 * not too bright so they look good on white background. This class is thread
26 * safe.
27 *
28 * @author akiraly
29 */
30 public class RgbColorGenerator implements IGenerator<Color> {
31 private final Random rnd;
32
33 /**
34 * Constructor.
35 *
36 * @param rnd
37 * random generator to be used, can be null
38 */
39 public RgbColorGenerator(Random rnd) {
40 this.rnd = rnd != null ? rnd : new Random();
41 }
42
43 public Color next() {
44 int[] c = new int[3];
45
46 int i = rnd.nextInt(c.length);
47
48 for (int fi = 0; fi < c.length; fi++) {
49 if (fi == i) {
50 c[fi] = rnd.nextInt(71);
51 } else {
52 c[fi] = rnd.nextInt(256);
53 }
54 }
55
56 return new Color(c[0], c[1], c[2]);
57 }
58
59 }