ALLEGRO_INDEX_BUFFER - Allegro 5 API

       A GPU index buffer that you can use to store indices of vertices in a vertex buffer on the GPU instead of
       uploading them afresh during every drawing operation.

       ALLEGRO_INDEX_BUFFER - Allegro 5 API

al_create_index_buffer(3alleg5), al_destroy_index_buffer(3alleg5)

Allegro reference manual                                                           ALLEGRO_INDEX_BUFFER(3alleg5)

       5.1.8

              #include <allegro5/allegro_primitives.h>

              typedef struct ALLEGRO_INDEX_BUFFER ALLEGRO_INDEX_BUFFER;