sub: add --sub-fonts-dir and --osd-fonts-dir options

These options make it possible to specify the directory that will be
passed to ass_set_fonts_dir(), akin to VLC's `--ssa-fontsdir` and
FFmpeg's `fontsdir`.

Fixes #8338

1 files changed, 1 insertions, 0 deletions

diff --git a/sub/osd.h b/sub/osd.h
index 9b87dcc58a..39a88ea240 100644
--- a/sub/osd.h
+++ b/sub/osd.h
@@ -157,6 +157,7 @@ struct osd_style_opts {
     bool italic;
     int justify;
     int font_provider;
+    char *fonts_dir;
 };
 
 extern const struct m_sub_options osd_style_conf;