Seek replacement for `ttf2pt1` for extracting font metrics about extrafont HOT 2 OPEN

On a mac, ttf2pt1 installed with Homebrew (using the bottled version compiled by them) works. It is a drop-in replacement for the one in Rttf2pt1 - as in I copied the homebrew binary to the Rttf2pt1/exec/ R library folder, and then all the TTF files in my system were able to be imported (i.e. no segmentation fault and the Font Name was returned) except for a few. (With Rttf2pt1, only about half worked).

from extrafont.

I did a quick test with ttf2afm from pdftex and on first sight it might work out. At the moment pdf export seems to function properly on linux systems (I tested this also on Mac OS, but I did not install ghostscript).

I patched truetype.r to use ttf2afm in my fork: https://github.com/sjewo/extrafont

You might need to install the binary first:

library(tinytex)
tlmgr_install("ttfutils")

Update:

• On a second system the afm files from ttf2afm differ and pdf export fails (unknown width).
• afm files from fontforge are usable, too

from extrafont.