ImageScale2x.java

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/*
 * This file is part of JXClient, the Fullscreen Java Crossfire Client.
 *
 * JXClient 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.
 *
 * JXClient 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 JXClient; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Copyright (C) 2005-2008 Yann Chachkoff.
 * Copyright (C) 2006-2011 Andreas Kirschbaum.
 */

package com.realtime.crossfire.jxclient.faces;

import java.awt.image.BufferedImage;
import java.io.File;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import org.jetbrains.annotations.NotNull;

public class ImageScale2x {

    @NotNull
    private final int[] srcData;

    private final int width;

    private final int height;

    public ImageScale2x(@NotNull final Icon srcImageIcon) {
        width = srcImageIcon.getIconWidth();
        height = srcImageIcon.getIconHeight();

        srcData = new int[width*height];
        final BufferedImage srcBufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
        srcImageIcon.paintIcon(null, srcBufferedImage.getGraphics(), 0, 0);
        srcBufferedImage.getRGB(0, 0, width, height, srcData, 0, width);
    }

    @NotNull
    public ImageIcon getScaledImage() {
        final RawScale2x scaler = new RawScale2x(srcData, width, height);

        final BufferedImage image = new BufferedImage(width*2, height*2, BufferedImage.TYPE_INT_ARGB);
        image.setRGB(0, 0, width*2, height*2, scaler.getScaledData(), 0, width*2);

        return new ImageIcon(image);
    }

    public static void main(@NotNull final String[] args) {
        final String srcFile = "random_orig.png";
        System.out.println("Reading: "+srcFile);
        final ImageIcon src = new ImageIcon(srcFile);
        final ImageScale2x scaler = new ImageScale2x(src);
        final Icon out = scaler.getScaledImage();

        final String outFile = srcFile.substring(0, srcFile.length()-4)+"2x.png";
        System.out.println("Writing: "+outFile);
        final FileCache fileCache = new FileCache(new File("cache"));
        fileCache.save(outFile, 0, out);
    }

}