001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.imaging.color; 018 019/** 020 * Represents a color in the CIELAB color space, also 021 * known as LAB color space. 022 * 023 * <p>Contains the constant values for black, white, red, 024 * green, and blue.</p> 025 * 026 * @see <a href="https://en.wikipedia.org/wiki/CIELAB_color_space#CIELAB">https://en.wikipedia.org/wiki/CIELAB_color_space#CIELAB</a> 027 * @since 1.0-alpha1 028 */ 029public final class ColorCieLab { 030 031 /** 032 * A constant for color black. Color components are: 033 * <pre> 034 * L: 0 035 * a: 0 036 * b: 0 037 * </pre> 038 */ 039 public static final ColorCieLab BLACK = new ColorCieLab(0, 0, 0); 040 041 /** 042 * A constant for color white. Color components are: 043 * <pre> 044 * L: 100 045 * a: 0 046 * b: 0 047 * </pre> 048 */ 049 public static final ColorCieLab WHITE = new ColorCieLab(100, 0, 0); 050 051 /** 052 * A constant for color red. Color components are: 053 * <pre> 054 * L: 53 055 * a: 80 056 * b: 67 057 * </pre> 058 */ 059 public static final ColorCieLab RED = new ColorCieLab(53, 80, 67); 060 061 /** 062 * A constant for color green. Color components are: 063 * <pre> 064 * L: 88 065 * a: -86 066 * b: 83 067 * </pre> 068 */ 069 public static final ColorCieLab GREEN = new ColorCieLab(88, -86, 83); 070 071 /** 072 * A constant for color blue. Color components are: 073 * <pre> 074 * L: 32 075 * a: 79 076 * b: -108 077 * </pre> 078 */ 079 public static final ColorCieLab BLUE = new ColorCieLab(32, 79, -108); 080 081 public final double L; 082 public final double a; 083 public final double b; 084 085 public ColorCieLab(final double L, final double a, final double b) { 086 this.L = L; 087 this.a = a; 088 this.b = b; 089 } 090 091 @Override 092 public String toString() { 093 return "{L: " + L + ", a: " + a + ", b: " + b + "}"; 094 } 095 096 @Override 097 public boolean equals(final Object o) { 098 if (this == o) { 099 return true; 100 } 101 if (o == null || getClass() != o.getClass()) { 102 return false; 103 } 104 105 final ColorCieLab that = (ColorCieLab) o; 106 if (Double.compare(that.L, L) != 0) { 107 return false; 108 } 109 if (Double.compare(that.a, a) != 0) { 110 return false; 111 } 112 if (Double.compare(that.b, b) != 0) { 113 return false; 114 } 115 116 return true; 117 } 118 119 @Override 120 public int hashCode() { 121 int result; 122 long temp; 123 temp = Double.doubleToLongBits(L); 124 result = (int) (temp ^ (temp >>> 32)); 125 temp = Double.doubleToLongBits(a); 126 result = 31 * result + (int) (temp ^ (temp >>> 32)); 127 temp = Double.doubleToLongBits(b); 128 result = 31 * result + (int) (temp ^ (temp >>> 32)); 129 return result; 130 } 131}