How can the font Open Baskerville be used with plain TeX?

I downloaded the font Open Baskerville from here, but I don't know how to use it. How can it be loaded in plain TeX? I can use any of `tex`, `pdftex` or `xetex`. (I am using `texlive` on Linux.)

• You can, with XeTeX; however it appears that the OTF font has no features nor ligatures defined (although it seems to have the glyphs for the f-ligatures). There's no italic font and so I don't think it's really usable yet. – egreg Nov 11 '15 at 17:19
• you may fake italics with slanted, and fake poor man's boldface; they may be usable, but most of them fake. – erreka Nov 11 '15 at 21:32

The program `otfinfo` shows no feature in the OTF font file, which makes it pretty unusable with XeTeX unless a mapping file is prepared for adding f-ligatures or other ones.

However, the distribution comes with a `features.fea` file that allows to get ligatures with LuaTeX.

I unzipped the downloaded archive and moved to the created directory; I changed the name of

``````OpenBaskerville-0.0.75.otf
``````

into the more sensible `OpenBaskerville.otf`; then I moved the file `features.fea` from the folder `OpenBaskerville-0.0.75.ufo` into the working directory, renaming it to `OpenBaskerville.fea`.

Finally I prepared the following file

``````\input luaotfload.sty

\OBx

{\OBxviii A section title}

\medskip

Ligatures such as firefly and flagstaff
but not gictast

\OBxS

Ligatures such as firefly and flagstaff
but also gictast

\bye
``````

and processed it with `luatex`, obtaining

Unfortunately the font seems to be at a very preliminary stage and has no italic companion font. Artificially slanting it would be a sin against the memory of Baskerville and his beautiful italic fonts.