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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License V2.
 *
 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
 * LICENSE ("AGREEMENT"). [GNU General Public License V2]
 *
 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
 * RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
 *
 * You may obtain a copy of the License at
 *
 * https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
 *
 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this GPL v2 license.
 *
 * The generated images can then be used without any reference to the GPL v2 license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package net.sourceforge.plantuml.math;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;

import javax.swing.Icon;

import net.sourceforge.plantuml.klimt.MutableImage;
import net.sourceforge.plantuml.klimt.geom.XDimension2D;
import net.sourceforge.plantuml.klimt.shape.UImageSvg;

public class LatexBuilder implements ScientificEquation {

	private final String tex;

	public LatexBuilder(String tex) {
		this.tex = tex;
	}

	private XDimension2D dimension;

	public XDimension2D getDimension() {
		return dimension;
	}

	private Icon buildIcon(Color foregroundColor)
			throws ClassNotFoundException, NoSuchMethodException, SecurityException, InstantiationException,
			IllegalAccessException, IllegalArgumentException, InvocationTargetException {
		return new TeXIconBuilder(tex, foregroundColor).getIcon();
	}

	public UImageSvg getSvg(double scale, Color foregroundColor, Color backgroundColor)
			throws ClassNotFoundException, IllegalAccessException, IllegalArgumentException, InvocationTargetException,
			NoSuchMethodException, SecurityException, InstantiationException, IOException {
		final Icon icon = buildIcon(foregroundColor);
		final ConverterSvg converterSvg = new ConverterSvg(icon);
		final String svg = converterSvg.getSvg(scale, true, backgroundColor);
		dimension = converterSvg.getDimension();
		return new UImageSvg(svg, scale);
	}

	public MutableImage getImage(Color foregroundColor, Color backgroundColor)
			throws ClassNotFoundException, NoSuchMethodException, SecurityException, InstantiationException,
			IllegalAccessException, IllegalArgumentException, InvocationTargetException {
		final Icon icon = buildIcon(foregroundColor);
		return new LatexImage(icon, 1, foregroundColor, backgroundColor);
	}

	class LatexImage implements MutableImage {

		private final double scale;
		private final Icon icon;
		private final Color foregroundColor;
		private final Color backgroundColor;
		private BufferedImage cache = null;

		public LatexImage(Icon icon, double scale, Color foregroundColor, Color backgroundColor) {
			this.scale = scale;
			this.foregroundColor = foregroundColor;
			this.backgroundColor = backgroundColor;
			this.icon = icon;
		}

		@Override
		public BufferedImage getImage() {
			if (cache == null) {
				cache = new BufferedImage((int) (icon.getIconWidth() * scale), (int) (icon.getIconHeight() * scale),
						BufferedImage.TYPE_INT_ARGB);
				final Graphics2D g2 = cache.createGraphics();
				g2.scale(scale, scale);
				if (backgroundColor != null) {
					g2.setColor(backgroundColor);
					g2.fillRect(0, 0, icon.getIconWidth(), icon.getIconHeight());
				}
				icon.paintIcon(null, g2, 0, 0);
			}
			return cache;
		}

		public MutableImage withScale(double scale) {
			return new LatexImage(icon, this.scale * scale, foregroundColor, backgroundColor);
		}

		@Override
		public MutableImage muteColor(Color newColor) {
			return this;
		}

		@Override
		public MutableImage muteTransparentColor(Color newColor) {
			return this;
		}

		@Override
		public MutableImage monochrome() {
			return this;
		}

		@Override
		public double getScale() {
			return scale;
		}

	}

	public String getSource() {
		return tex;
	}

}