    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=
    022 *      "https://pdfs.semanticscholar.org/647b/20bda458133ff2b883041746bc8cb75527fc.pdf">Comparison of the metrics between the CIELAB and the DIN99 uniform
    023 *      color spaces</a>
    024 * @see <a href="https://www.researchgate.net/publication/229891006_Uniform_colour_spaces_based_on_the_DIN99_colour-difference_formula">DIN99b P.284:
    025 *      Uniform_colour_spaces_based_on_the_DIN99_colour-difference_formula</a>
    026 * @since 1.0-alpha3
    027 */
    028public final class ColorDin99Lab {
    029
    030    public final double L99;
    031
    032    public final double a99;
    033
    034    public final double b99;
    035
    036    public ColorDin99Lab(final double L99, final double a99, final double b99) {
    037        this.L99 = L99;
    038        this.a99 = a99;
    039        this.b99 = b99;
    040    }
    041
    042    @Override
    043    public String toString() {
    044        return "{L: " + L99 + ", a: " + a99 + ", b: " + b99 + "}";
    045    }
    046
    047    @Override
    048    public boolean equals(final Object o) {
    049        if (this == o) {
    050            return true;
    051        }
    052        if (o == null || getClass() != o.getClass()) {
    053            return false;
    054        }
    055
    056        final ColorDin99Lab that = (ColorDin99Lab) o;
    057        if (Double.compare(that.L99, L99) != 0) {
    058            return false;
    059        }
    060        if (Double.compare(that.a99, a99) != 0) {
    061            return false;
    062        }
    063        if (Double.compare(that.b99, b99) != 0) {
    064            return false;
    065        }
    066
    067        return true;
    068    }
    069
    070    @Override
    071    public int hashCode() {
    072        int result;
    073        long temp;
    074        temp = Double.doubleToLongBits(L99);
    075        result = (int) (temp ^ temp >>> 32);
    076        temp = Double.doubleToLongBits(a99);
    077        result = 31 * result + (int) (temp ^ temp >>> 32);
    078        temp = Double.doubleToLongBits(b99);
    079        result = 31 * result + (int) (temp ^ temp >>> 32);
    080        return result;
    081    }
    082}