This is the same as the winding rule concept (overlap _once_ = wounded twice) ... I seem to remember one of them is even-odd and the other is non-zero, and quite fundamental difference between truetype and cff.
On Tuesday, 19 December 2023 at 13:54:21 GMT, Alexei Podtelezhnikov <
apodtele@gmail.com> wrote:
It's easy enough to add FT_OUTLINE_OVERLAP to any glyph loaded from a
CFF2 font. Whether that makes sense is one thing I'd like advice about.
There's currently no such code.
I would suggest that CFF2 invent a special charstring to mark overlapswith FT_OUTLINE_OVERLAP only when necessary. Let us know to implementit in FreeType.
WOFF2 is moving towards accepting explicit overlap flags. Perhaps CFF2 can spare a reserved operator or a two-byte operator.