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 CIE 1931 color space, also known as XYZ color space. 021 * 022 * <p> 023 * Contains the constant values for black, white, red, green, and blue. 024 * </p> 025 * 026 * @see <a href="https://en.wikipedia.org/wiki/CIE_1931_color_space">https://en.wikipedia.org/wiki/CIE_1931_color_space</a> 027 * @since 1.0-alpha1 028 */ 029public final class ColorXyz { 030 031 /** 032 * A constant for color black. Color components are: 033 * 034 * <pre> 035 * X: 0 036 * Y: 0 037 * Z: 0 038 * </pre> 039 */ 040 public static final ColorXyz BLACK = new ColorXyz(0, 0, 0); 041 042 /** 043 * A constant for color white. Color components are: 044 * 045 * <pre> 046 * X: 95.05 047 * Y: 100.00 048 * Z: 108.90 049 * </pre> 050 */ 051 public static final ColorXyz WHITE = new ColorXyz(95.05, 100, 108.9); 052 053 /** 054 * A constant for color red. Color components are: 055 * 056 * <pre> 057 * X: 41.24 058 * Y: 21.26 059 * Z: 1.93 060 * </pre> 061 */ 062 public static final ColorXyz RED = new ColorXyz(41.24, 21.26, 1.93); 063 064 /** 065 * A constant for color green. Color components are: 066 * 067 * <pre> 068 * X: 35.76 069 * Y: 71.52 070 * Z: 11.92 071 * </pre> 072 */ 073 public static final ColorXyz GREEN = new ColorXyz(35.76, 71.52, 11.92); 074 075 /** 076 * A constant for color blue. Color components are: 077 * 078 * <pre> 079 * X: 18.05 080 * Y: 7.22 081 * Z: 95.05 082 * </pre> 083 */ 084 public static final ColorXyz BLUE = new ColorXyz(18.05, 7.22, 95.05); 085 086 public final double x; 087 public final double y; 088 public final double z; 089 090 public ColorXyz(final double x, final double y, final double z) { 091 this.x = x; 092 this.y = y; 093 this.z = z; 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 ColorXyz colorXyz = (ColorXyz) o; 106 if (Double.compare(colorXyz.x, x) != 0) { 107 return false; 108 } 109 if (Double.compare(colorXyz.y, y) != 0) { 110 return false; 111 } 112 if (Double.compare(colorXyz.z, z) != 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(x); 124 result = (int) (temp ^ temp >>> 32); 125 temp = Double.doubleToLongBits(y); 126 result = 31 * result + (int) (temp ^ temp >>> 32); 127 temp = Double.doubleToLongBits(z); 128 return 31 * result + (int) (temp ^ temp >>> 32); 129 } 130 131 @Override 132 public String toString() { 133 return "{X: " + x + ", Y: " + y + ", Z: " + z + "}"; 134 } 135}