https://bugs.kde.org/show_bug.cgi?id=422862

            Bug ID: 422862
           Summary: SVG gradient inside ellipse does not work in all
                    cases.
           Product: konqueror
           Version: 5.0.97
          Platform: Kubuntu Packages
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: khtml svg
          Assignee: [email protected]
          Reporter: [email protected]
                CC: [email protected]
  Target Milestone: ---

Created attachment 129252
  --> https://bugs.kde.org/attachment.cgi?id=129252&action=edit
HTML file to reproduce bug, and to show correct operation

SUMMARY


STEPS TO REPRODUCE
1. 
2. 
3. 

OBSERVED RESULT
<!-- WORKS: cx="20%" cy="30%" r="37%" fx='50%' fy="50%" -->
<!-- FAILS: cx="20%" cy="30%" r="36%" fx='50%' fy="50%" -->
<radialGradient id="grad2" cx="20%" cy="30%" r="37%" fx='50%' fy="50%">

Using the Parameters above marked "FAILS:" (Note r="36%") the gradient appears
as a flat "pie chart" sort of thing.

EXPECTED RESULT
Ellipse containing a "headlights on the road" internal ellipse gradient. Using
the Parameters above marked "WORKS:" (Note r="37%") the gradient appears as
expected.

OK, I'm not a great mathematician. I may be doing something wrong, but I don't
see how. I change the angle of the gradient by 1 degree and it fails. This is
the entire HTML I'm using (I'm learning how to use SVG, and I believe in
learning it old school - writing the code without an IDE.).
Is it some kind of degrees-to-Radians mistake? or is it a legit bug?

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 5.12.9
(available in About System) <<== Doesn't allow copy-paste from the INFO.
                             <<== So I had to type in all the numbers by hand.
Why was this one display made uncopyable?????????
KDE Plasma Version: 5.12.9
KDE Frameworks Version:5.44.0

Qt Version: Qt: 5.9.5
Kernel: 5.3.0-59-generic
OS Type: 64-bit
Processors: 8 x Intel Core i5-8265U
Konqueror: Version 5.0.97
ADDITIONAL INFORMATION

"About KDE" in Konqueror help menu doesn't show version.

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