kpathsea: Fallback font
6.3.3 Fallback font
-------------------
If a bitmap font cannot be found or created at the requested size,
Kpathsea looks for the font at a set of "fallback resolutions". You
specify these resolutions as a colon-separated list (like search paths).
Kpathsea looks first for a program-specific environment variable (e.g.,
'DVIPSSIZES' for Dvipsk), then the environment variable 'TEXSIZES', then
a default specified at compilation time (the Make variable
'default_texsizes'). You can set this list to be empty if you prefer to
find fonts at their stated size or not at all.
Finally, if the font cannot be found even at the fallback
resolutions, Kpathsea looks for a fallback font, typically 'cmr10'.
Programs must enable this feature by calling 'kpathsea_init_prog' (⇒
Calling sequence); the default is no fallback font.
Info Catalog
kpathsea: Fontmap
kpathsea: Glyph lookup