al_get_opengl_texture_size - Allegro 5 API

       Retrieves  the  size  of  the texture used for the bitmap.  This can be different from the bitmap size if
       OpenGL only supports power-of-two sizes or if it is a sub-bitmap.

       Returns true on success, false on failure.  Zero width and height are returned if the bitmap  is  not  an
       OpenGL bitmap.

       al_get_opengl_texture_size - Allegro 5 API

al_get_opengl_texture_position(3alleg5)

Allegro reference manual                                                     al_get_opengl_texture_size(3alleg5)

              #include <allegro5/allegro_opengl.h>

              bool al_get_opengl_texture_size(ALLEGRO_BITMAP *bitmap, int *w, int *h)