al_get_current_transform - Allegro 5 API

       Returns  the  transformation of the current target bitmap, as set by al_use_transform(3alleg5).  If there
       is no target bitmap, this function returns NULL.

       Returns: A pointer to the current transformation.

       al_get_current_transform - Allegro 5 API

al_get_current_projection_transform(3alleg5)

Allegro reference manual                                                       al_get_current_transform(3alleg5)

              #include <allegro5/allegro.h>

              const ALLEGRO_TRANSFORM *al_get_current_transform(void)