Large polygons with negative values hang VM/rasterizer

Name: gsC80088 Date: 01/20/99


If you run this small program that
simply draws a polygon in JDK1.2RC2 (NT 4), then
it never returns and the VM is using 100% of the
CPU.

This works if you draw directly on the
standard Graphics or if you use antialiasing.

You can see this by running this small program:


import java.awt.*;
public class bigpolygon extends Panel
{

  public void paint(Graphics g) {

    Image offscreen = createImage( getBounds().width, getBounds().height);
    g = offscreen.getGraphics();
    int joinx[] = {-50080, -50083, 620053, 620056};
    int joiny[] = {20470, 20462, -24597, -24589};
    g.setColor(Color.blue);
    g.drawPolygon(joinx, joiny, 4);
    
  }

  public static void main(String[] args) {
    Frame f = new Frame();
    f.setLayout(new BorderLayout());
    f.add(new bigpolygon(), BorderLayout.CENTER);
    f.show();
  }

}
(Review ID: 43617)
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