https://bugs.documentfoundation.org/show_bug.cgi?id=99244

            Bug ID: 99244
           Summary: OpenGL: Fat lines Miter geometry creation error
           Product: LibreOffice
           Version: 5.1.0.0.alpha1
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: graphics stack
          Assignee: [email protected]
          Reporter: [email protected]

Created attachment 124281
  --> https://bugs.documentfoundation.org/attachment.cgi?id=124281&action=edit
Draw file containing the bezier curve that is displayed wrong

Follow-up to bug 99165. Take the bugdoc from there (aslo adding here), load ->
extra diagonal geometry is created and painted what is wrong.
The curve has basegfx::B2DLineJoin::Miter set which needs to create a Miter
graphic LineJoin (dependent of MiterLimit, see literature). This curve is
'extreme' in having no control point close to the edge point (additionally the
other control points are on the prolonged common edge).
In this case, the edge graphic has to be clipped as
basegfx::B2DLineJoin::Bevel.

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