On Wed, Oct 23, 2019 at 3:00 PM Marcel Fabian Krüger <t...@2krueger.de> wrote:
> Hey, > > in `writefont0.c` and `writefont2.c`, `ff_get_ttc_index` is called to > determine the index of the font in a font collection. This uses the > original filename from fd->fm->ff_name and therefore does not respect > lookups done using the find_opentype_file etc. callbacks. > > In writefont0.c, this could be fixed relativly easily by passing using > cur_file_name, the name after the callback, instead. But even than there > are remianing problems because this still wouldn't respect > read_..._file callbacks. So implementing this correctly is quite tricky > and it also isn't really necessary in most cases: Especially when using > Lua-loaded fonts, the code creating the font needs to know the index > anyway. So maybe an approach like in Khaled Hosny's HarfTeX could be > used: Allow a Lua-loaded font to explicitly set the index and only use > ff_get_ttc_index if this index isn't set. Then backward-compatibility is > kept but the actually used index selection can be influenced using Lua. > (HarfTeX implemented this in > > https://github.com/khaledhosny/harftex/commit/caded3e80f106687c84f9613aa318cb3023a1422 > ) > done in revision 7222 by Hans. -- luigi
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