ImageManager.java

/* Copyright or (C) or Copr. GET / ENST, Telecom-Paris, Ludovic Apvrille
 * 
 * ludovic.apvrille AT enst.fr
 * 
 * This software is a computer program whose purpose is to allow the
 * edition of TURTLE analysis, design and deployment diagrams, to
 * allow the generation of RT-LOTOS or Java code from this diagram,
 * and at last to allow the analysis of formal validation traces
 * obtained from external tools, e.g. RTL from LAAS-CNRS and CADP
 * from INRIA Rhone-Alpes.
 * 
 * This software is governed by the CeCILL  license under French law and
 * abiding by the rules of distribution of free software.  You can  use,
 * modify and/ or redistribute the software under the terms of the CeCILL
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info".
 * 
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability.
 * 
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or
 * data to be ensured and,  more generally, to use and operate it in the
 * same conditions as regards security.
 * 
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL license and that you accept its terms.
 */





package myutil;

import java.awt.*;
import java.awt.image.BufferedImage;



/**
* Class ImageManager
* Creation: 31/05/2017
* @version 1.1 31/05/2017
* @author Ludovic APVRILLE
*/
public final class ImageManager {

    /**
     * Resizes an image using a Graphics2D object backed by a BufferedImage.
     * @param src - source image to scale
     * @param w - desired width
     * @param h - desired height
     * @return - the new resized image
     */
    public static BufferedImage getScaledImage(BufferedImage src, int w, int h){
        int finalw = w;
        int finalh = h;
        double factor = 1.0d;
        if(src.getWidth() > src.getHeight()){
            factor = ((double)src.getHeight()/(double)src.getWidth());
            finalh = (int)(finalw * factor);
        }else{
            factor = ((double)src.getWidth()/(double)src.getHeight());
            finalw = (int)(finalh * factor);
        }

        BufferedImage resizedImg = new BufferedImage(finalw, finalh, BufferedImage.TRANSLUCENT);
        Graphics2D g2 = resizedImg.createGraphics();
        g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g2.drawImage(src, 0, 0, finalw, finalh, null);
        g2.dispose();
        return resizedImg;
    }


}