ImageUtil.java Source code

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Here is the source code for ImageUtil.java

Source

/**
 * COPYRIGHT. Harry Wu 2010. ALL RIGHTS RESERVED.
 * Project: EasyPhoto
 * Author: Harry Wu <harrywu304@gmail.com>
 * Created On: Jun 28, 2008 5:12:21 PM
 *
 */
//package org.shaitu.easyphoto.util;

import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.IndexColorModel;
import java.awt.image.WritableRaster;
import java.io.File;
import java.util.Iterator;
import java.util.List;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
import javax.imageio.stream.ImageOutputStream;
import javax.swing.ImageIcon;

/**
 * userful methods about image
 * @author harry
 */
public class ImageUtil {
    public final static String JPEG = "jpeg";
    public final static String JPG = "jpg";
    public final static String BMP = "bmp";
    public final static String PNG = "png";
    public final static String GIF = "gif";
    public final static String TIFF = "tiff";
    public final static String TIF = "tif";

    /**
     * get image thumbnail
     * @param imageFile
     */
    public static ImageIcon getImageThumbnail(File imageFile, int width, int height) {
        ImageIcon thumbnail = null;
        if (imageFile != null && imageFile.isFile()) {
            ImageIcon tmpIcon = new ImageIcon(imageFile.getPath());
            if (tmpIcon != null) {
                if (tmpIcon.getIconWidth() > width) {
                    int targetHeight = width / tmpIcon.getIconWidth() * tmpIcon.getIconHeight();
                    if (targetHeight > height) {
                        targetHeight = height;
                    } else {
                        targetHeight = -1;
                    }
                    thumbnail = new ImageIcon(
                            tmpIcon.getImage().getScaledInstance(width, targetHeight, Image.SCALE_AREA_AVERAGING));
                } else {
                    thumbnail = tmpIcon;
                }
            }
        }
        return thumbnail;
    }
}