[Libreoffice-bugs] [Bug 121845] New: custom shape with command U (angleellipse) is wrongly drawn

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=121845

            Bug ID: 121845
           Summary: custom shape with command U (angleellipse) is wrongly
                    drawn
           Product: LibreOffice
           Version: 6.3.0.0.alpha0+ Master
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Draw
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: rb.henschel at t-online.de

Created attachment 147205
  --> https://bugs.documentfoundation.org/attachment.cgi?id=147205&action=edit
Wrong rendering of angleellipse

The command U in the enhanced-path is wrongly drawn. You see the problem, if
you compare the endpoints of the curve with the handle.

The essential part in page 2 of the attached file is
<draw:enhanced-geometry draw:mirror-horizontal="false"
draw:mirror-vertical="false" svg:viewBox="0 0 21600 21600"
draw:text-areas="3000 3000 18000 18000" draw:type="non-primitive"
draw:modifiers="200" draw:enhanced-path="U 10800 10800 10800 10800 $0 270 F N">
      <draw:handle draw:handle-position="10800 $0" draw:handle-polar="10800
10800"/>
     </draw:enhanced-geometry>

The modifier is directly referenced in the polar-handle and in the
enhanced-path.

Expected behavior: The curve starts at the handle and goes clockwise to the
direction 270°, which is down vertical axis. That would generate a large arc.

Current behavior: The curve is drawn counter clockwise and it does not start at
the handle.

I had reported the problem already for Apache OpenOffice in
https://bz.apache.org/ooo/show_bug.cgi?id=121491

This error prevents a proper import and converting from ooxml-arc.

[The spec has radius and angle in draw:handle-position the other way round. But
because PowerPoint has it the same way as LibreOffice, that will likely be
changed in the spec and is not part of this issue.
http://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#attribute-draw_enhanced-path]

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