eiad is a font from a different era, and seemingly almost unusable today. I can't use it at all with XeLaTeX, and when I begrudgingly tried to use it with
pdflatex, I get only an ugly rasterization, no outlines to be seen.
It has been stated elsewhere that METAFONT fonts are usable with XeLaTeX—and please correct me if I'm wrong—but this seems to only be true of popular fonts that have been converted, not forgotten fonts on the margins like Eiad.
I even found a paper from 2004 (Karel Píška, “Creating Type 1 Fonts from METAFONT Sources”) which states unequivocally:
To do fully automatic conversion of a perfect METAFONT glyph definition into perfect Type 1 outline curves is very difficult at best, perhaps impossible.
You might say, “Why not just use an OpenType font?”, to which I reply, the Eiad fonts are all extremely beautiful and go well together, there are even italics and a typewriter style, there are proper bold and smallcap faces.
I don't want another font. I want Eiad, exactly Eiad, and nothing else. With that in mind, what should I do to get vectors out of it in 2019? How should I start converting it? Why can't XeLaTeX use it at all if it allegedly can use METAFONT fonts?