Name: jk109818 Date: 07/10/2002


FULL PRODUCT VERSION :
java version "1.4.1-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-beta-b14)
Java HotSpot(TM) Client VM (build 1.4.1-beta-b14, mixed mode)

FULL OPERATING SYSTEM VERSION :
Microsoft Windows XP [Version 5.1.2600]

EXTRA RELEVANT SYSTEM CONFIGURATION :
Graphics card is Matrox G550 but it shouldn't be involved

A DESCRIPTION OF THE PROBLEM :
REGRESSION:
Using an affineTransform to rotate a bitmap with drawImage
performs the rotation with wrong rotation angle (half of
expected angle).

REGRESSION. Last worked in version 1.4

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Run sample with 1.4 => no bug
2. Run sample with 1.4.1 beta => see the bug
3.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED result SHOULD BE a bitmap with a rotation angle
of 90.
ACTUAL result IS a bitmap with a rotation angle of 45
degrees.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
No error message because its a rendering bug

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package bug;
/*
 * DrawImageRotationBugInJDK1_4_1Beta.java
 *
 * Created on 7 juillet 2002, 17:16
 */
import javax.imageio.*;
import java.awt.image.*;
import java.net.*;
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;

/**
 * The result SHOULD BE a bitmap with a rotation angle of 90 degrees.
 * The result IS a bitmap with a rotation angle of 45 degrees.
 *
 * It WAS working in JDK 1.4
 * It IS NOT working in JDK 1.4.1 beta
 *
 * @author Xavier Kral
 */
public class RotationBug {
    
    /** Creates a new instance of RotationBug */
    public RotationBug() {
    }
    
    public static void main(String[] args) {
        try {
            BufferedImage source = ImageIO.read(new URL
("http://java.sun.com/images/java_logo.gif"));
            int width = source.getWidth();
            int height = source.getHeight();
            BufferedImage target = new BufferedImage(height, width,
BufferedImage.TYPE_INT_RGB);
            AffineTransform at = AffineTransform.getTranslateInstance(height,
0);
            int rotationAngle = 90;
            at.rotate(Math.toRadians(rotationAngle));
            // apply rotation via AT
            Graphics2D g2 = target.createGraphics();
            g2.drawImage(source, at, null);
            JFrame frame = new JFrame();
            frame.getContentPane().add(new JLabel(new ImageIcon(target)));
            frame.pack();
            frame.show();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}

---------- END SOURCE ----------
(Review ID: 159001)
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