[jira] Resolved: (HARMONY-4791) [classlib][awt][image] Harmony has problem in drawing medium-or-large size of png file if not guarded by MediaTracker

["Alexei Zakharov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HARMONY-4791?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexei Zakharov resolved HARMONY-4791.
--------------------------------------

    Resolution: Fixed

Thanks Igor, there is no hangs with the new patch. I've applied it at the revision 587465. Please verify that everything is fine. 

> [classlib][awt][image] Harmony has problem in drawing medium-or-large size of png file if not guarded by MediaTracker
> ---------------------------------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-4791
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4791
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>         Environment: Win32
>            Reporter: Chunrong Lai
>            Assignee: Alexei Zakharov
>         Attachments: 10million.PNG, 40million.PNG, H-4791-2.patch, H-4791-3.patch, H-4791.patch
>
>
>  Sometimes I even observed that Harmony crashes in multi-threading environment but I have not reproducer yet.
>  Anyway with below reproducer Harmony draw a glittering 10million.png and the 40million.png breaks finally.
> import java.io.*;
> import java.awt.*;
> import java.awt.image.*;
> import javax.swing.*;
> public class DrawImageTest extends JFrame {
>    public Image image;
>    public static void  main(String[] args){
>       DrawImageTest aTest = new DrawImageTest();
>       if(args.length <1) {
>          System.out.println("Please input a valid image name");
>          System.exit(0);
>       }
>       aTest.setSize(800, 600);
>       aTest.readImage(args[0]);
>       aTest.show();
>    }
>    public DrawImageTest(){}
>    public void readImage(String imageName){
>        if(image == null) {
>          image = Toolkit.getDefaultToolkit().getImage(imageName);
>          /*******
>          MediaTracker imageTracker = new MediaTracker(new JPanel());
>          imageTracker.addImage(image, 0);
>          try{
>           imageTracker.waitForID(0);
>          }catch(InterruptedException e){}
>          ********/
>          if(image == null) System.out.println("we get an image of null");
>          else              System.out.println("we get an image of width " + image.getWidth(this) + " height " + image.getHeight(this));
>        }
>    }   
>    public void paint(Graphics g){
>        super.paint(g);
>        g.drawImage(image, 0, 0, null);
>    }
> }

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