1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.imaging.color;
18
19 /**
20 * Represents a color in the CIELCH color space.
21 *
22 * <p>
23 * Contains the constant values for black, white, red, green, and blue.
24 * </p>
25 *
26 * @see <a href=
27 * "https://en.wikipedia.org/wiki/CIELUV#Cylindrical_representation_(CIELCH)">https://en.wikipedia.org/wiki/CIELUV#Cylindrical_representation_(CIELCH)</a>
28 * @since 1.0-alpha1
29 */
30 public final class ColorCieLch {
31
32 /**
33 * A constant for color black. Color components are:
34 *
35 * <pre>
36 * L: 0
37 * c: 0
38 * h: 0
39 * </pre>
40 */
41 public static final ColorCieLch BLACK = new ColorCieLch(0, 0, 0);
42
43 /**
44 * A constant for color white. Color components are:
45 *
46 * <pre>
47 * L: 100
48 * c: 0
49 * h: 297
50 * </pre>
51 */
52 public static final ColorCieLch WHITE = new ColorCieLch(100, 0, 297);
53
54 /**
55 * A constant for color red. Color components are:
56 *
57 * <pre>
58 * L: 53
59 * c: 80
60 * h: 67
61 * </pre>
62 */
63 public static final ColorCieLch RED = new ColorCieLch(53, 80, 67);
64
65 /**
66 * A constant for color green. Color components are:
67 *
68 * <pre>
69 * L: 88
70 * c: -86
71 * h: 83
72 * </pre>
73 */
74 public static final ColorCieLch GREEN = new ColorCieLch(88, -86, 83);
75
76 /**
77 * A constant for color blue. Color components are:
78 *
79 * <pre>
80 * L: 32
81 * c: 79
82 * h: -108
83 * </pre>
84 */
85 public static final ColorCieLch BLUE = new ColorCieLch(32, 79, -108);
86
87 public final double l;
88 public final double c;
89 public final double h;
90
91 public ColorCieLch(final double l, final double c, final double h) {
92 this.l = l;
93 this.c = c;
94 this.h = h;
95 }
96
97 @Override
98 public boolean equals(final Object o) {
99 if (this == o) {
100 return true;
101 }
102 if (o == null || getClass() != o.getClass()) {
103 return false;
104 }
105
106 final ColorCieLch that = (ColorCieLch) o;
107 if (Double.compare(that.c, c) != 0) {
108 return false;
109 }
110 if (Double.compare(that.h, h) != 0) {
111 return false;
112 }
113 if (Double.compare(that.l, l) != 0) {
114 return false;
115 }
116
117 return true;
118 }
119
120 @Override
121 public int hashCode() {
122 int result;
123 long temp;
124 temp = Double.doubleToLongBits(l);
125 result = (int) (temp ^ temp >>> 32);
126 temp = Double.doubleToLongBits(c);
127 result = 31 * result + (int) (temp ^ temp >>> 32);
128 temp = Double.doubleToLongBits(h);
129 return 31 * result + (int) (temp ^ temp >>> 32);
130 }
131
132 @Override
133 public String toString() {
134 return "{L: " + l + ", C: " + c + ", h: " + h + "}";
135 }
136 }