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A Java API to render LaTeX
There is a newer version: 1.0.7
/* GraphicsAtom.java
 * =========================================================================
 * This file is part of the JLaTeXMath Library - http://forge.scilab.org/jlatexmath
 *
 * Copyright (C) 2009 DENIZET Calixte
 *
 * This program 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 2 of the License, or (at
 * your option) any later version.
 *
 * This program is 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.
 *
 * A copy of the GNU General Public License can be found in the file
 * LICENSE.txt provided with the source distribution of this program (see
 * the META-INF directory in the source jar). This license can also be
 * found on the GNU website at http://www.gnu.org/licenses/gpl.html.
 *
 * If you did not receive a copy of the GNU General Public License along
 * with this program, contact the lead developer, or write to the Free
 * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 *
 * Linking this library statically or dynamically with other modules 
 * is making a combined work based on this library. Thus, the terms 
 * and conditions of the GNU General Public License cover the whole 
 * combination.
 * 
 * As a special exception, the copyright holders of this library give you 
 * permission to link this library with independent modules to produce 
 * an executable, regardless of the license terms of these independent 
 * modules, and to copy and distribute the resulting executable under terms 
 * of your choice, provided that you also meet, for each linked independent 
 * module, the terms and conditions of the license of that module. 
 * An independent module is a module which is not derived from or based 
 * on this library. If you modify this library, you may extend this exception 
 * to your version of the library, but you are not obliged to do so. 
 * If you do not wish to do so, delete this exception statement from your 
 * version.
 * 
 */

package org.scilab.forge.jlatexmath;

import java.awt.image.ImageObserver;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.MediaTracker;
import java.awt.Label;
import java.awt.Graphics2D;
import java.awt.Toolkit;
import java.io.File;
import java.net.URL;
import java.net.MalformedURLException;
import java.util.Map;

/**
 * An atom representing an atom containing a graphic.
 */
public class GraphicsAtom extends Atom {
    
    private Image image = null;
    private BufferedImage bimage;
    private Label c;
    private int w, h;

    private Atom base;
    private boolean first = true;
    private int interp = -1;

    public GraphicsAtom(String path, String option) {
	File f = new File(path);
	if (!f.exists()) {
	    try {
		URL url = new URL(path);
		image = Toolkit.getDefaultToolkit().getImage(url);
	    } catch (MalformedURLException e) {
		image = null;
	    }
	} else {
	    image = Toolkit.getDefaultToolkit().getImage(path);
	}
	
	if (image != null) {
	    c = new Label();
	    MediaTracker tracker = new MediaTracker(c);
	    tracker.addImage(image, 0);
	    try {
		tracker.waitForID(0);
	    } catch (InterruptedException e) {
		image = null;
	    }
	}
	draw();
	buildAtom(option);
    }

    protected void buildAtom(String option) {
	base = this;
    	Map options = ParseOption.parseMap(option);
	if (options.containsKey("width") || options.containsKey("height")) {
	    base = new ResizeAtom(base, options.get("width"), options.get("height"), options.containsKey("keepaspectratio"));
	}
	if (options.containsKey("scale")) {
	    double scl = Double.parseDouble(options.get("scale"));
	    base = new ScaleAtom(base, scl, scl); 
	}
	if (options.containsKey("angle") || options.containsKey("origin")) {
	    base = new RotateAtom(base, options.get("angle"), options.get("origin"));
	}
	if (options.containsKey("interpolation")) {
	    String meth = options.get("interpolation");
	    if (meth.equalsIgnoreCase("bilinear")) {
		interp = GraphicsBox.BILINEAR;
	    } else if (meth.equalsIgnoreCase("bicubic")) {
		interp = GraphicsBox.BICUBIC;
	    } else if (meth.equalsIgnoreCase("nearest_neighbor")) {
		interp = GraphicsBox.NEAREST_NEIGHBOR;
	    }
	}
    }
	
    public void draw() {
	if (image != null) {
	    w = image.getWidth(c);
	    h = image.getHeight(c);
	    bimage = new BufferedImage(w, h, BufferedImage.TYPE_INT_ARGB);
	    Graphics2D g2d = bimage.createGraphics();
	    g2d.drawImage(image, 0, 0, null);
	    g2d.dispose();
	}
    }

    public Box createBox(TeXEnvironment env) {
	if (image != null) {
	    if (first) {
		first = false;
		return base.createBox(env);
	    } else {
		env.isColored = true;
		float width = w * SpaceAtom.getFactor(TeXConstants.UNIT_PIXEL, env);
		float height = h * SpaceAtom.getFactor(TeXConstants.UNIT_PIXEL, env);
		return new GraphicsBox(bimage, width, height, env.getSize(), interp);
	    }
	}

	return new TeXFormula("\\text{ No such image file ! }").root.createBox(env);
    }
}