tdf#103474 handle edge cases in ARCANGLETO

The arc-polygon generation in tools does not consider edge cases with
zero height or width. That leads to wrong rendering in some ooxml
shapes, when the handle is dragged to its extrem position, e.g. in
left/right braces/bracket and can.

I have switched from tools to basegfx in case ARCANGLETO and added
handling for edge cases. Switching to basegfx has the additional
advantage, that Bezier curves are used and not polylines. You see
the difference, if you convert the shape to curve.
ARCANGLETO is not used from our shapes or from import from binary
MS Office, but only from OOXML or user-defined custom shapes.

tdf#122323 MS Office restricts the swing angle to [-360°,360] in
rendering. Such restriction is not in OOXML and not in ODF.
Nevertheless, I have added a clamp for ooxml-foo shapes for better
interoperability.

Change-Id: Ib3233ce14dab950cc521cb8cbac6809a1d3e34a7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/96068
Tested-by: Jenkins
Reviewed-by: Regina Henschel <rb.henschel@t-online.de>

0 files changed, 0 insertions, 0 deletions