After some thinking I can imagine that the following works.
. Add `FT_FACE_FLAG_TRICKY'. If set, the font is tricky. To access
it, add a macro `FT_IS_TRICKY'. [This is a read-only flag.]
. Change the meaning of `FT_LOAD_NO_HINTING' so that fonts which
always need TrueType
. Add `FT_FACE_FLAG_TRICKY'. If set, the font is tricky. To
access it, add a macro `FT_IS_TRICKY'. [This is a read-only
flag.]
. Change the meaning of `FT_LOAD_NO_HINTING' so that fonts which
always need TrueType instructions (these are fonts which have
FT_FACE_FLAG_TRICKY
