Man pages matching name allegro_touch_input_state in section 3alleg5:

ALLEGRO_TOUCH_INPUT_STATE.3alleg5.en	debian 10 / allegro5-doc
ALLEGRO_TOUCH_INPUT_STATE.3alleg5.en	debian 11 / allegro5-doc
ALLEGRO_TOUCH_INPUT_STATE.3alleg5.en	debian 12 / allegro5-doc