Re: Bug in ImageIO PNG support

From:

"<<<Klu>>>" <klu@montenegro.usfa.edu>

Newsgroups:

comp.lang.java.gui

Date:

Sat, 27 Jun 2009 00:37:51 -0400

Message-ID:

<h247oq$toj$1@aioe.org>

<<<Klu>>> wrote:

No, whatever's going wrong is going wrong inside ImageIO.read. It can't
even be that read is convolving in some way that write is deconvolving.
Not with a scale transform in between, and the write to a .jpg instead
of a .png.

This code reproduces it on my system:

package zzzbugfind2;

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;

public class Main {
     public static void main(String[] args) throws Exception {
         SwingUtilities.invokeAndWait(new Runnable() {
             public void run() {
                 try {
                     BufferedImage bi = ImageIO.read(new URL("http:" +
                             "//libpng.org/pub/png/img_png/" +
                             "pnglogo-blk.png"));
                     JFrame frame = new JFrame();
                     frame.getContentPane().add(new
                             JLabel(new ImageIcon(bi)));
                     frame.pack();
                     frame.setVisible(true);
                 } catch (IOException e) {
                     // Ignore.
                 }
             }
         });
     }
}