Man pages matching name al_draw_tinted_scaled_rotated_bitmap_region in section 3alleg5:

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