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From Philippe Mouawad <philippe.moua...@gmail.com>
Subject Re: Fwd: JAVA8u20 and JAVA8u25 Regression in Graphics2D drawing of derived Fonts ?
Date Wed, 19 Nov 2014 15:10:09 GMT
Hello Rory,
I posted a bug, waiting for mail notification.
It seems bug appeared after Java 7 u40 as I just tested now with Java7 u71
and it is also broken there.
I didn't test versions between 7u40 and 7u71.

Regards
Philippe

On Wed, Nov 19, 2014 at 3:44 PM, Rory O'Donnell <rory.odonnell@oracle.com>
wrote:

> Hi Philippe,
>
> Can you log a Java Incident and send us the JI  number ?
>
> Rgds,Rory
> On 19/11/2014 14:36, Philippe Mouawad wrote:
>
>> Hello Rory,
>> For information, I submitted this question on Swing-dev , I am not sure it
>> is the right list, if so hope you can help.
>>
>> Regards
>> Philippe
>> ---------- Forwarded message ----------
>> From: Philippe Mouawad <philippe.mouawad@gmail.com>
>> Date: Wed, Nov 19, 2014 at 3:34 PM
>> Subject: JAVA8u20 and JAVA8u25 Regression in Graphics2D drawing of derived
>> Fonts ?
>> To: swing-dev@openjdk.java.net
>>
>>
>> Hello,
>> We had recently a report of a bug on Apache JMeter:
>>
>>     - https://issues.apache.org/bugzilla/show_bug.cgi?id=57221
>>
>>
>> The bug only occurs on Java 8 (u20 and u25).
>>
>> We use jCharts library.
>>
>> I narrowed the bug and it seems to come from the way derived fonts are
>> drawn:
>>
>> Library uses:
>>
>>      public static final AffineTransform VERTICAL_ROTATION =
>> AffineTransform.getRotateInstance( -Math.PI / 2 );
>>
>> Then
>>
>>          this.affineTransform= VERTICAL_ROTATION;
>> this.font.deriveFont( this.affineTransform )
>>
>> So I build a stupid and ugly isolated class to show issue, run it on Java
>> 7
>> display is fine , run it on Java8 result is strange.
>>
>> package org.jCharts;
>>
>> import java.awt.Color;
>> import java.awt.Dimension;
>> import java.awt.Font;
>> import java.awt.Graphics;
>> import java.awt.Graphics2D;
>> import java.awt.RenderingHints;
>> import java.awt.font.FontRenderContext;
>> import java.awt.font.LineMetrics;
>> import java.awt.geom.AffineTransform;
>> import java.awt.geom.GeneralPath;
>> import java.awt.geom.Rectangle2D;
>>
>> import javax.swing.JFrame;
>> import javax.swing.JPanel;
>>
>> public class Test extends JPanel {
>>      Rectangle2D.Float rect = new Rectangle2D.Float(200, 200, 220, 35);
>>      // float theta = 1.1748778437843f;
>>      double theta = Math.PI / 6;
>>
>>      @Override
>>      protected void paintComponent(Graphics g) {
>>          super.paintComponent(g);
>>          Graphics2D g2 = (Graphics2D) g;
>>          g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
>>                  RenderingHints.VALUE_ANTIALIAS_ON);
>>          g2.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
>>                  RenderingHints.VALUE_FRACTIONALMETRICS_ON);
>>          g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL,
>>                  RenderingHints.VALUE_STROKE_PURE);
>>          g2.setPaint(Color.blue);
>>          Font font = g2.getFont().deriveFont(18f);
>>          g2.setFont(font);
>>          FontRenderContext frc = g2.getFontRenderContext();
>>          String s = "This text should be rotated";
>>          float width = (float) font.getStringBounds(s, frc).getWidth();
>>          LineMetrics lm = font.getLineMetrics(s, frc);
>>          float height = lm.getAscent() + lm.getDescent();
>>          // Scale text into rect.
>>          float xScale = rect.width / width;
>>          float yScale = rect.height / height;
>>          float scale = (xScale > yScale) ? yScale : xScale;
>>          // Locate string origin.
>>          double x = rect.x;
>>          double y = rect.y + (rect.height + scale * height) / 2 - scale
>>                  * lm.getDescent();
>>          AffineTransform at = AffineTransform.getTranslateInstance(x, y);
>>          at.scale(scale, scale);
>>          AffineTransform rotator = new AffineTransform();
>>          rotator.rotate(theta, rect.getCenterX(), rect.getCenterY());
>>          GeneralPath rect2 = new GeneralPath(
>>                  rotator.createTransformedShape(rect));
>>          // Draw with no rotation.
>>          g2.draw(rect);
>>          g2.setPaint(Color.red);
>>          g2.setFont(font.deriveFont(at));
>>          g2.drawString(s, 0, 0);
>>          // Rotate once.
>>          g2.setPaint(Color.blue);
>>          g2.draw(rect2);
>>          rotator.concatenate(at);
>>          g2.setFont(font.deriveFont(rotator));
>>          g2.setPaint(Color.red);
>>          g2.drawString(s, 0, 0);
>>          // Rotate again.
>>          rotator.setToIdentity();
>>          rotator.rotate(2 * theta, rect.getCenterX(), rect.getCenterY());
>>          rect2 = new GeneralPath(rotator.createTransformedShape(rect));
>>          g2.setPaint(Color.blue);
>>          g2.draw(rect2);
>>          rotator.concatenate(at);
>>          g2.setFont(font.deriveFont(rotator));
>>          g2.setPaint(Color.red);
>>          g2.drawString(s, 0, 0);
>>          // Check scaled string bounds.
>>          // this was handled by the fractional metrics rendering hint
>>      }
>>
>>      public static void main(String[] args) {
>>          Test test = new Test();
>>          test.setPreferredSize(new Dimension(800, 600));
>>          JFrame f = new JFrame();
>>          f.getContentPane().add(test);
>>          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
>>          f.pack();
>>          f.setVisible(true);
>>      }
>> }
>>
>> Regards
>> Philippe M.
>>
>>
>>
>>
> --
> Rgds,Rory O'Donnell
> Quality Engineering Manager
> Oracle EMEA , Dublin, Ireland
>
>


-- 
Cordialement.
Philippe Mouawad.

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