1al_lock_vertex_buffer(3)                              al_lock_vertex_buffer(3)
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NAME

6       al_lock_vertex_buffer - Allegro 5 API
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SYNOPSIS

9              #include <allegro5/allegro_primitives.h>
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11              void* al_lock_vertex_buffer(ALLEGRO_VERTEX_BUFFER* buffer, int offset,
12                 int length, int flags)
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DESCRIPTION

15       Locks  a vertex buffer so you can access its data.  Will return NULL if
16       the parameters are invalid, if reading is requested from a  write  only
17       buffer, or if the buffer is already locked.
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19       Parameters:
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21       • buffer - Vertex buffer to lock
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23       • offset - Vertex index of the start of the locked range
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25       • length - How many vertices to lock
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27       • flags   -   ALLEGRO_LOCK_READONLY,  ALLEGRO_LOCK_WRITEONLY  or  ALLE‐
28         GRO_LOCK_READWRITE
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SINCE

31       5.1.3
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SEE ALSO

34       ALLEGRO_VERTEX_BUFFER(3), al_unlock_vertex_buffer(3)
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38Allegro reference manual                              al_lock_vertex_buffer(3)