    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 * http://www.apache.org/licenses/LICENSE-2.0
    009 * Unless required by applicable law or agreed to in writing, software
    010 * distributed under the License is distributed on an "AS IS" BASIS,
    011 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012 * See the License for the specific language governing permissions and
    013 * limitations under the License.
    014 */
    015package org.apache.commons.imaging.color;
    016
    017/**
    018 * Represents a color in the DIN99 color space, a derivation of the CIE LAB color space.
    019 *
    020 * @see <a href="de.wikipedia.org/wiki/DIN99-Farbraum">de.wikipedia.org/wiki/DIN99-Farbraum</a>
    021 * @see <a href= "https://pdfs.semanticscholar.org/647b/20bda458133ff2b883041746bc8cb75527fc.pdf">Comparison of the metrics between the CIELAB and the DIN99
    022 *      uniform color spaces</a>
    023 * @see <a href="https://www.researchgate.net/publication/229891006_Uniform_colour_spaces_based_on_the_DIN99_colour-difference_formula">DIN99b P.284:
    024 *      Uniform_colour_spaces_based_on_the_DIN99_colour-difference_formula</a>
    025 * @since 1.0-alpha3
    026 */
    027public final class ColorDin99Lab {
    028
    029    public final double l99;
    030
    031    public final double a99;
    032
    033    public final double b99;
    034
    035    public ColorDin99Lab(final double l99, final double a99, final double b99) {
    036        this.l99 = l99;
    037        this.a99 = a99;
    038        this.b99 = b99;
    039    }
    040
    041    @Override
    042    public boolean equals(final Object o) {
    043        if (this == o) {
    044            return true;
    045        }
    046        if (o == null || getClass() != o.getClass()) {
    047            return false;
    048        }
    049
    050        final ColorDin99Lab that = (ColorDin99Lab) o;
    051        if (Double.compare(that.l99, l99) != 0) {
    052            return false;
    053        }
    054        if (Double.compare(that.a99, a99) != 0) {
    055            return false;
    056        }
    057        if (Double.compare(that.b99, b99) != 0) {
    058            return false;
    059        }
    060
    061        return true;
    062    }
    063
    064    @Override
    065    public int hashCode() {
    066        int result;
    067        long temp;
    068        temp = Double.doubleToLongBits(l99);
    069        result = (int) (temp ^ temp >>> 32);
    070        temp = Double.doubleToLongBits(a99);
    071        result = 31 * result + (int) (temp ^ temp >>> 32);
    072        temp = Double.doubleToLongBits(b99);
    073        return 31 * result + (int) (temp ^ temp >>> 32);
    074    }
    075
    076    @Override
    077    public String toString() {
    078        return "{l: " + l99 + ", a: " + a99 + ", b: " + b99 + "}";
    079    }
    080}