Bug 212921

Summary:	Graphical drawing is incorrect
Product:	[Fedora] Fedora	Reporter:	Tom Van Vleck <thvv>
Component:	java-1.4.2-gcj-compat	Assignee:	Francis Kung <francis.kung>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
URL:	http://www.multicians.org/thvv/pie-chart.html
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2008-04-02 22:29:50 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Tom Van Vleck 2006-10-30 04:36:07 UTC

Description of problem:
Just installed fc6, followed instructions to enable Java applets.
A very simple pie chart applet displays all wrong.
See the URL above for an example.
The referenced web page has a pointer to the source for the applet.


Version-Release number of selected component (if applicable):
/usr/bin/java
java version "1.4.2"
gij (GNU libgcj) version 4.1.1 20061011 (Red Hat 4.1.1-30)


How reproducible: always


Steps to Reproduce:
1. Visit http://www.multicians.org/thvv/pie-chart.html in firefox.
2. 
3.
  
Actual results:
The lines that should run from the center of the pie chart to the circumference
are plotted as chords of the circle instead. This leaves a big gray patch in the
center of the circle.


Expected results:
Try the same page on OS X or on Fedora FC5/Firefox 1.5 with Sun Java installed.
 Pie chart displays as expected.  Even Windows can do it, in FF or MSIE.


Additional info:

Comment 1 Thomas Fitzsimmons 2006-10-30 15:02:24 UTC

Assigning to Francis Kung.  Francis, can you see if this is fixed on GNU
Classpath CVS HEAD?

Comment 2 Tom Van Vleck 2006-10-30 15:11:14 UTC

It appears that the statement

 g.fillArc(pieBorderWidth, pieBorderWidth, pieDiameter, pieDiameter, startDeg,
arcDeg);

is not filling the triangle defined by the end points of the chord and the
center of the circle.  Strange that whatever bug causes this AWT routine to fail
would not cause other failures also.

Comment 3 Francis Kung 2006-10-30 21:47:56 UTC

I can confirm that this bug still exists on the latest GNU Classpath.  Looking
into it...

Comment 4 Francis Kung 2006-10-31 20:50:54 UTC

This has been fixed upstream in GNU Classpath CVS.