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
<[email protected]> 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 overlaps
with FT_OUTLINE_OVERLAP only when necessary. Let us know to implement
it in FreeType.
https://www.w3.org/TR/WOFF2/#p1
WOFF2 is moving towards accepting explicit overlap flags. Perhaps CFF2 can
spare a reserved operator or a two-byte operator.
