package com.struts2.framework.util;

import com.sun.image.codec.jpeg.*;
import java.awt.Dimension;
import java.awt.image.*;
import java.io.*;
import java.net.URL;

public class ImageUtil {
	public static Dimension getDimension(InputStream in) {
		try {
			ImageInfo ii = new ImageInfo();
			ii.setInput(in);
			if (ii.check()) {
				int width = ii.getWidth();
				int height = ii.getHeight();
				if (width > 0 && height > 0) {
					int format = ii.getFormat();
					if (format == ImageInfo.FORMAT_GIF
							|| format == ImageInfo.FORMAT_JPEG
							|| format == ImageInfo.FORMAT_PNG
							|| format == ImageInfo.FORMAT_SWF)
						return new Dimension(width, height);
				}
			}
		} catch (Exception ex) {
			ex.printStackTrace();
		}
		return null;
	}

	public static boolean convert(String oldName, String newSummName,
			int width, int height) {
		BufferedImage bufferedImage = new BufferedImage(width, height, 1);
		Object uc = null;
		try {
			URL u = new URL("file", "localhost", oldName);
			uc = u.getContent();
		} catch (IOException ioexception) {
			return false;
		}
		ImageProducer scaledImageProducer = null;
		int pixels[] = new int[width * height];
		try {
			scaledImageProducer = new FilteredImageSource((ImageProducer) uc,
					new AreaAveragingScaleFilter(width, height));
			PixelGrabber pg = new PixelGrabber(scaledImageProducer, 0, 0,
					width, height, pixels, 0, width);
			pg.grabPixels();
		} catch (InterruptedException interruptedexception) {
			return false;
		}
		bufferedImage.setRGB(0, 0, width, height, pixels, 0, width);
		byte result[] = null;
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		JPEGEncodeParam encParam = JPEGCodec
				.getDefaultJPEGEncodeParam(bufferedImage);
		encParam.setQuality(0.75F, false);
		JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(baos, encParam);
		try {
			encoder.encode(bufferedImage, encParam);
			baos.flush();
			byte encodedImage[] = baos.toByteArray();
			baos.close();
			OutputStream os = new FileOutputStream(newSummName);
			os.write(encodedImage);
			os.flush();
			os.close();
			os = null;
		} catch (IOException ioexception1) {
			return false;
		}
		return true;
	}

	public ImageUtil() {
	}
}