Man pages matching name fli_bmp_dirty_from in section 3alleg4:

fli_bmp_dirty_from.3alleg4.en	debian 10 / allegro4-doc
fli_bmp_dirty_from.3alleg4.en	debian 11 / allegro4-doc
fli_bmp_dirty_from.3alleg4.en	debian 12 / allegro4-doc