net.sourceforge.plantuml.ugraphic.ColorMapperMonochrome Maven / Gradle / Ivy

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/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2020, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
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 * 
 * This file is part of PlantUML.
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PlantUML distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
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 *
 * Original Author:  Arnaud Roques
 * 
 *
 */
package net.sourceforge.plantuml.ugraphic;

import java.awt.Color;

import net.sourceforge.plantuml.graphic.HtmlColor;

public class ColorMapperMonochrome implements ColorMapper {

	private final boolean reverse;

	public ColorMapperMonochrome(boolean reverse) {
		this.reverse = reverse;
	}

	public Color getMappedColor(HtmlColor htmlColor) {
		if (htmlColor == null) {
			return null;
		}
		final Color color = new ColorMapperIdentity().getMappedColor(htmlColor);
		int grayScale = (int) (color.getRed() * .3 + color.getGreen() * .59 + color.getBlue() * .11);
		if (reverse) {
			grayScale = 255 - grayScale;
		}
		return new Color(grayScale, grayScale, grayScale);
	}
}