JAVA EXE CRASHES when using Images on 16-color displays

Name: sg39081 Date: 08/14/97


1. Create an Image using a pixel array:
        myImage = createImage(new MemoryImageSource(
                                  100,100,pixarray,0,100));
        myTracker.addImage(myImage,1);

2. Draw the image:

    if (myTracker.checkID(1,true))
{
g.drawImage(myImage,20,40,this);

3. Works OK on displays with 256 colors. Causes WINDOWS
   PROTECTION EXCEPTION (in javai.dll) on 16 color display.


company - FORE Systems, Inc. , email - ###@###.###
======================================================================


ingrid.yao@Eng 1997-08-21

Oracle reported the same problem:

 The test case failed. Included a simple dialog box that has a canvas
which holds a 16-color image. They tested on a Compaq machine that was
running NT 4.0 w/ 16 colors by using JDK 1.1.1, 1.1.3, and 1.1.4. In
all cases they had java vm error. If they do not have the image added
to dialog box, it works. Test includes Test.java and Splash.gif files.
You could get Splash.gif under ~ingridy/Oracle/Splash.gif

test case:
===========
import java.awt.*;

/*
    Ibrahim Beyazit and Fai Leong
    Tested on Compaq machine that had NT 4.0 w/ 16 color
    Used JDK 1.1.1, 1.1.3, and 1.1.4
*/

public class Test extends Dialog
{
public Test(Frame parentFrame)
{

        super(parentFrame, "Test", true);

        // comment these two lines, works. Once add the image you get Java vm error
        ImageCanvas ic = new ImageCanvas();
        add("Center", ic);

        // set size of the dialog; close to the size of the image
        int width = 200,
            height = 210;
        setSize(width,height);

        // center on the screen
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
        setLocation((d.width - width) / 2, (d.height - height) /2);
}

static public void main(String args[])
{
(new Test(new Frame())).setVisible(true);
}
}

class ImageCanvas extends Canvas
{
    private Image image = Toolkit.getDefaultToolkit().getImage("Splash.gif");

    public void paint(Graphics g)
    {
        g.drawImage(image, 1 , 1, this);
    }
}


jeff.hsiao@Eng 1997-10-17
No specific test case available. Implicitly tested, closed with exposure