[Fontconfig] where does fc-query get its fontversion from?

[Khaled Hosny]

On Thu, Apr 27, 2017 at 10:34:48AM +1000, Nigel Tao wrote:
> A user of the Go Fonts asks me (at
> https://github.com/golang/image/commit/f03a046406d4d7fbfd4ed29f554da8f6114049fc#commitcomment-21898082):
> 
> Fontconfig says that the font version is "2.2.12" but the git commit
> message says the font version is 2.008. Why the difference?
> 
> $ printf "0x%x\n" $(fc-query -f '%{fontversion}' Go-Smallcaps.ttf)
> 0x2020c

It comes from the head table and is encoded as 16.16 fixed-point number:
https://www.microsoft.com/typography/otspec/head.htm

So 131596 / 65536.0 = 2.008.

Regards,
Khaled