>Each member of fstack.items[0.. fstack.depth-1].font is a composite
>font and its descendant fonts can be accessed by described above. But
>contents of FDepVector are references to another gs_font objects.
>'fstack' is an array describing a single path of fonts those ware
>selected to 'show' current glyph. gs_type0_next_char_glyph() is
>called for each glyph to know if selected descendant font path has
>been changed for next glyph.
Ah, that makes more sense now, thanks for the explanation.