How to convert jpg to wbmp?

Question

Please!!!
I need someone to teach(or tell) me how to convert jpg to wbmp!
Any help will be great!
I tried to find on web, but nothing...
Thanks!
Thales

Answer 1

I've never used wbmp format before, but here is a demo that I got to work:
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import java.net.*;
import java.util.*;
import javax.imageio.*;
import javax.swing.*;
public class WBMPTest {
    public static void main(String[] args) throws IOException {
        URL url = new URL("http://today.java.net/jag/Image24-large.jpeg");
        BufferedImage source = ImageIO.read(url);
        BufferedImage bandw = convert(source, BufferedImage.TYPE_BYTE_BINARY);
        File file = new File("temp.wbmp");
        writeWBMP(bandw, file);
        //writeWBMP(source, file);//Only integral single-band bilevel image is supported
        BufferedImage fromFile = ImageIO.read(file);
        if (fromFile == null){
            System.err.println("read fails");
            System.exit(-1);
        JPanel cp = new JPanel(new GridLayout(0,1));
        addToPanel(cp, source, "original");
        addToPanel(cp, bandw, "black and white");
        addToPanel(cp, fromFile, "temp.wbmp");
        JFrame f = new JFrame("WBMPTest");
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new JScrollPane(cp));
        f.setSize(850, 600);
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    public static BufferedImage convert(BufferedImage source, int type) {
        int w = source.getWidth(), h = source.getHeight();
        BufferedImage image = new BufferedImage(w, h, type);
        Graphics2D g = image.createGraphics();
        g.drawRenderedImage(source, null);
        g.dispose();
        return image;
    static void writeWBMP(BufferedImage image, File file) throws IOException {
        Iterator writers = ImageIO.getImageWritersBySuffix("wbmp");
        if (!writers.hasNext()) {
            System.err.println("no wbmp writers");
            System.exit(-1);
        ImageWriter writer = (ImageWriter) writers.next();
        writer.setOutput(ImageIO.createImageOutputStream(file));
        writer.write(image);
    static void addToPanel(JPanel cp, BufferedImage image, String title) {
        JLabel label = new JLabel(new ImageIcon(image));
        JPanel labelPanel = new JPanel(new GridLayout(1,1));
        labelPanel.setBorder(BorderFactory.createTitledBorder(title));
        labelPanel.add(label);
        cp.add(labelPanel);
}The image sample format that succeeds is black-and-white (not greyscale -- each pixel is
either black or white, not a shade of grey). When I write to switch the image that was written
out to the colored version, I got the the commented error:
Only integral single-band bilevel image is supported
I don't know what color models WBMP supports, but that's not much to sing about!
You should find out if this limitation is in the wbmp image writer or in the wbmp format itself.