ImageUtils.java

/*
 * This file is part of Technic Launcher.
 * Copyright ©2015 Syndicate, LLC
 *
 * Technic Launcher 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.
 *
 * Technic Launcher 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with Technic Launcher.  If not, see <http://www.gnu.org/licenses/>.
 */

package net.technicpack.utilslib;

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

public class ImageUtils {

    public static BufferedImage scaleWithAspectWidth(BufferedImage img, int width) {
        int imgWidth = img.getWidth();
        int imgHeight = img.getHeight();
        int height = imgHeight * width / imgWidth;
        return scaleImage(img, width, height);
    }

    public static BufferedImage scaleImage(BufferedImage img, int width, int height) {
        BufferedImage newImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        Graphics2D g = newImage.createGraphics();
        try {
            g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
            g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
            g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            g.drawImage(img, 0, 0, width, height, null);
        } finally {
            g.dispose();
        }
        return newImage;
    }

    public static BufferedImage scaleWithAspectHeight(BufferedImage img, int height) {
        int imgWidth = img.getWidth();
        int imgHeight = img.getHeight();
        int width = imgWidth * height / imgHeight;
        return scaleImage(img, width, height);
    }


}