Name: krT82822 Date: 09/20/99


20 Sep 99 eval1127@eng -- (see also 4172999)

vertical and horizontal lines drawn with anti-aliasing are
not compatible with previous version.

I have tested on the following plateform :

D:\Users\Jolif\Essais>java -version
java version "1.3beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3beta-O)
Java(TM) HotSpot Client VM (build 1.3beta-O, mixed mode)

system : NT4.0

In JDK1.2.x (as said the documentation) vertical and horizontal
lines are rendered the same way in anti-aliasing or normal mode.

In JDK1.3 beta, vertical and horizontal lines are not rendered the
same way in anti-aliasing or normal mode.

Here is a sample showing the problem with an horizontal line
(the problem is the same with vertical lines, or rectangles).
Launch the sample in JDK1.2.x you will see that both lines
(anti-aliasing or normal mode) are identical.
Launch the sample in JDK1.3 beta and you will se that the
anti-alisased line is thicker than the other one.

import java.awt.*;

public class Anti extends Frame
{
  public static void main(String[] arg)
  {
    Anti a = new Anti();
    a.setVisible(true);
  }

  public Anti()
  {
    super();
    setSize(640, 400);
  }

  // CJO 09/99
  public void paint(Graphics g)
  {
    Graphics2D g2d = (Graphics2D)g;

    g2d.setColor(Color.black);

    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
    g2d.drawLine(100, 100, 160, 100);

    g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
     RenderingHints.VALUE_ANTIALIAS_OFF);
    g2d.drawLine(100, 130, 160, 130);

    super.paint(g);
  }
}
(Review ID: 95442)
======================================================================