How to export 'Octagon Bevel' and 'Diamond Bevel' to OOXML

[Regina Henschel]

Hi all,

Currently 'Octagon Bevel' and 'Diamond Bevel' are exported as shape 
'rect'. That is bug tdf#109169.

Both shape types do not exist in MS binary, therefore export to MS 
binary exports them as image. Because a user cannot change color or text 
after reopening, I think we should not do that for OOXML. What is your 
opinion?

Because there exist no suitable OOXML preset shape, we need to export 
them with <custGeom>. I could make dedicated 'Write_Octagon_Bevel' and 
'Write_Diamond_Bevel' methods with OOXML handles and guides. Should I do 
that?

I can at least move them from lcl_IsOnDenylist to lcl_IsOnAllowlist. 
That way the export will generate the outline as octagon or diamond with 
fixed lines from the current handle state of the shape. I think that 
would be better than the 'rect' now.

The real problem is their shading. It is not contained as command in the 
enhanced geometry. It is encoded into the type identifier, see 
https://bz.apache.org/ooo/show_bug.cgi?id=33139. The current 
implementation of that "feature" has a bug, see 
https://bz.apache.org/ooo/show_bug.cgi?id=80216.
This "feature" uses more grades of shading than the four available in OOXML.
So what should I do with the shading of these shapes?

Kind regards,
Regina