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 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 package org.apache.commons.imaging.color;
16
17 /**
18 * Represents a color in the DIN99 color space, a derivation of the CIE LAB color space.
19 *
20 * @see <a href="de.wikipedia.org/wiki/DIN99-Farbraum">de.wikipedia.org/wiki/DIN99-Farbraum</a>
21 * @see <a href= "https://pdfs.semanticscholar.org/647b/20bda458133ff2b883041746bc8cb75527fc.pdf">Comparison of the metrics between the CIELAB and the DIN99
22 * uniform color spaces</a>
23 * @see <a href="https://www.researchgate.net/publication/229891006_Uniform_colour_spaces_based_on_the_DIN99_colour-difference_formula">DIN99b P.284:
24 * Uniform_colour_spaces_based_on_the_DIN99_colour-difference_formula</a>
25 * @since 1.0-alpha3
26 */
27 public final class ColorDin99Lab {
28
29 public final double l99;
30
31 public final double a99;
32
33 public final double b99;
34
35 public ColorDin99Lab(final double l99, final double a99, final double b99) {
36 this.l99 = l99;
37 this.a99 = a99;
38 this.b99 = b99;
39 }
40
41 @Override
42 public boolean equals(final Object o) {
43 if (this == o) {
44 return true;
45 }
46 if (o == null || getClass() != o.getClass()) {
47 return false;
48 }
49
50 final ColorDin99Lab that = (ColorDin99Lab) o;
51 if (Double.compare(that.l99, l99) != 0) {
52 return false;
53 }
54 if (Double.compare(that.a99, a99) != 0) {
55 return false;
56 }
57 if (Double.compare(that.b99, b99) != 0) {
58 return false;
59 }
60
61 return true;
62 }
63
64 @Override
65 public int hashCode() {
66 int result;
67 long temp;
68 temp = Double.doubleToLongBits(l99);
69 result = (int) (temp ^ temp >>> 32);
70 temp = Double.doubleToLongBits(a99);
71 result = 31 * result + (int) (temp ^ temp >>> 32);
72 temp = Double.doubleToLongBits(b99);
73 return 31 * result + (int) (temp ^ temp >>> 32);
74 }
75
76 @Override
77 public String toString() {
78 return "{l: " + l99 + ", a: " + a99 + ", b: " + b99 + "}";
79 }
80 }