ColorCieLab.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.commons.imaging.color;
/**
* Represents a color in the CIELAB color space, also known as LAB color space.
*
* <p>
* Contains the constant values for black, white, red, green, and blue.
* </p>
*
* @see <a href="https://en.wikipedia.org/wiki/CIELAB_color_space#CIELAB">https://en.wikipedia.org/wiki/CIELAB_color_space#CIELAB</a>
* @since 1.0-alpha1
*/
public final class ColorCieLab {
/**
* A constant for color black. Color components are:
*
* <pre>
* L: 0
* a: 0
* b: 0
* </pre>
*/
public static final ColorCieLab BLACK = new ColorCieLab(0, 0, 0);
/**
* A constant for color white. Color components are:
*
* <pre>
* L: 100
* a: 0
* b: 0
* </pre>
*/
public static final ColorCieLab WHITE = new ColorCieLab(100, 0, 0);
/**
* A constant for color red. Color components are:
*
* <pre>
* L: 53
* a: 80
* b: 67
* </pre>
*/
public static final ColorCieLab RED = new ColorCieLab(53, 80, 67);
/**
* A constant for color green. Color components are:
*
* <pre>
* L: 88
* a: -86
* b: 83
* </pre>
*/
public static final ColorCieLab GREEN = new ColorCieLab(88, -86, 83);
/**
* A constant for color blue. Color components are:
*
* <pre>
* L: 32
* a: 79
* b: -108
* </pre>
*/
public static final ColorCieLab BLUE = new ColorCieLab(32, 79, -108);
public final double l;
public final double a;
public final double b;
public ColorCieLab(final double l, final double a, final double b) {
this.l = l;
this.a = a;
this.b = b;
}
@Override
public boolean equals(final Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final ColorCieLab that = (ColorCieLab) o;
if (Double.compare(that.l, l) != 0) {
return false;
}
if (Double.compare(that.a, a) != 0) {
return false;
}
if (Double.compare(that.b, b) != 0) {
return false;
}
return true;
}
@Override
public int hashCode() {
int result;
long temp;
temp = Double.doubleToLongBits(l);
result = (int) (temp ^ temp >>> 32);
temp = Double.doubleToLongBits(a);
result = 31 * result + (int) (temp ^ temp >>> 32);
temp = Double.doubleToLongBits(b);
return 31 * result + (int) (temp ^ temp >>> 32);
}
@Override
public String toString() {
return "{L: " + l + ", a: " + a + ", b: " + b + "}";
}
}