al_draw_vertex_buffer - Allegro 5 API

       Draws a subset of the passed vertex buffer.  The vertex buffer must not be locked.  Additionally, to draw
       onto  memory bitmaps or with memory bitmap textures the vertex buffer must support reading (i.e.  it must
       be created with the ALLEGRO_PRIM_BUFFER_READWRITE).

       Parameters:

       • vertex_buffer - Vertex buffer to draw

       • texture - Texture to use, pass NULL to use only color shaded primitves

       • start - Start index of the subset of the vertex buffer to draw

       • end - One past the last index of the subset of the vertex buffer to draw

       • type - A member of the ALLEGRO_PRIM_TYPE(3alleg5) enumeration, specifying what  kind  of  primitive  to
         draw

       Returns: Number of primitives drawn

       al_draw_vertex_buffer - Allegro 5 API

ALLEGRO_VERTEX_BUFFER(3alleg5), ALLEGRO_PRIM_TYPE(3alleg5)

Allegro reference manual                                                          al_draw_vertex_buffer(3alleg5)

       5.1.3

              #include <allegro5/allegro_primitives.h>

              int al_draw_vertex_buffer(ALLEGRO_VERTEX_BUFFER* vertex_buffer,
                 ALLEGRO_BITMAP* texture, int start, int end, int type)