[Libreoffice-bugs] [Bug 121761] New: Increase accuracy of rounded corners in those custom shapes that use command X and Y

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=121761

            Bug ID: 121761
           Summary: Increase accuracy of rounded corners in those custom
                    shapes that use command X and Y
           Product: LibreOffice
           Version: 6.3.0.0.alpha0+ Master
          Hardware: x86-64 (AMD64)
                OS: Windows (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 147098
  --> https://bugs.documentfoundation.org/attachment.cgi?id=147098&action=edit
Compare quarter circle from custom shape with legacy circle

The command X (ellipticalquandrantx) and Y (ellipticalquadranty) in a path are
used for the rounded corner rectangle custom shape. They should provide a
quarter circle in case of equal radii. But the used Bézier curves have bad
parameters for their control points.

The attached document shows the rounded corner rectangle in comparison to a
legacy circle and legacy are. On the third page I have drawn lines as radius,
to show without Bézier curves involved, where the outline should be.

The solution has to be, that the custom shapes use for the X and Y commands the
common tools from basegfx.

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