optical size choice: wrong point unit used

[eroux]

Following this bug report on the XeTeX tracker, it seems that the wrong point unit is used when selecting the optical size because the indications given in the font are interpreted as given in pt while they should be interpreted as given in bp (see the XeTeX bug report for more info).

For instance the example

\input luaotfload.sty
\font\rm="Arno Pro" at 13.99bp \rm
Hello, world!\bye

will choose the Subhead version while it should choose the Regular one (the "top" range for regular being 14 and the bottom range for subhead being 14 too). I didn't manage to find an example of free font with multiple optical sizes...

[phi-gamma]

There’s a config option now that allows to choose from bp, pt, and dd
with bp being the default.

[eroux]

Thanks a lot!

[ArchangeGabriel]

Just for the record, a free font with multiple optical sizes could be https://github.com/georgd/EB-Garamond. There are 8 and 12 pt sizes available. ;)