al_create_vertex_buffer man page
al_create_vertex_buffer — Allegro 5 API
#include <allegro5/allegro_primitives.h> ALLEGRO_VERTEX_BUFFER* al_create_vertex_buffer(ALLEGRO_VERTEX_DECL* decl, const void* initial_data, int num_vertices, int flags)
Creates a vertex buffer. Can return NULL if the buffer could not be created (e.g. the system only supports write-only buffers).
This is an advanced feature, often unsupported on lower-end video cards. Be extra mindful of this function failing and make arrangements for fallback drawing functionality or a nice error message for users with such lower-end cards.
- decl - Vertex type that this buffer will hold. NULL implies that this buffer will hold ALLEGRO_VERTEX(3) vertices
- initial_data - Memory buffer to copy from to initialize the vertex buffer. Can be
NULL, in which case the buffer is uninitialized.
- num_vertices - Number of vertices the buffer will hold
- flags - A combination of the ALLEGRO_PRIM_BUFFER_FLAGS(3) flags specifying how this buffer will be created. Passing 0 is the same as passing
al_destroy_vertex_buffer(3), ALLEGRO_PRIM_BUFFER_FLAGS(3), ALLEGRO_VERTEX_BUFFER(3).