al_get_opengl_variant - Allegro 5 API

       Returns  the  variant or type of OpenGL used on the running platform.  This function can be called before
       creating a display or setting properties for new displays.  Possible values are:

       ALLEGRO_DESKTOP_OPENGL
              Regular OpenGL as seen on desktop/laptop computers.

       ALLEGRO_OPENGL_ES
              Trimmed down version of OpenGL used on many small consumer electronic  devices  such  as  handheld
              (and sometimes full size) consoles.

       al_get_opengl_variant - Allegro 5 API

al_get_opengl_version(3alleg5)

Allegro reference manual                                                          al_get_opengl_variant(3alleg5)

              #include <allegro5/allegro_opengl.h>

              int al_get_opengl_variant(void)