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93 lines
2.7 KiB
Java
93 lines
2.7 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2017, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*/
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package net.sourceforge.plantuml.graphic;
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import java.awt.Color;
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import net.sourceforge.plantuml.ugraphic.ColorMapper;
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public class HtmlColorGradient implements HtmlColor {
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private final HtmlColor color1;
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private final HtmlColor color2;
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private final char policy;
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public HtmlColorGradient(HtmlColor color1, HtmlColor color2, char policy) {
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if (color1 == null || color2 == null) {
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throw new IllegalArgumentException();
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}
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if (color1 instanceof HtmlColorGradient) {
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color1 = ((HtmlColorGradient) color1).color1;
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}
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if (color2 instanceof HtmlColorGradient) {
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color2 = ((HtmlColorGradient) color2).color2;
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}
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this.color1 = color1;
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this.color2 = color2;
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this.policy = policy;
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}
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public final HtmlColor getColor1() {
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return color1;
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}
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public final HtmlColor getColor2() {
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return color2;
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}
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public final Color getColor(ColorMapper mapper, double coeff) {
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if (coeff > 1 || coeff < 0) {
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throw new IllegalArgumentException("c=" + coeff);
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}
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final Color c1 = mapper.getMappedColor(color1);
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final Color c2 = mapper.getMappedColor(color2);
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final int vred = c2.getRed() - c1.getRed();
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final int vgreen = c2.getGreen() - c1.getGreen();
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final int vblue = c2.getBlue() - c1.getBlue();
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final int red = c1.getRed() + (int) (coeff * vred);
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final int green = c1.getGreen() + (int) (coeff * vgreen);
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final int blue = c1.getBlue() + (int) (coeff * vblue);
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return new Color(red, green, blue);
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}
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public final char getPolicy() {
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return policy;
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}
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}
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