.\" Automatically generated by Pandoc 1.17.2
.\"
.TH "al_lock_index_buffer(3alleg5) Allegro reference manual" "" "" "" ""
.hy
.SH NAME
.PP
al_lock_index_buffer \- Allegro 5 API
.SH SYNOPSIS
.IP
.nf
\f[C]
#include\ <allegro5/allegro_primitives.h>

void*\ al_lock_index_buffer(ALLEGRO_INDEX_BUFFER*\ buffer,\ int\ offset,
\ \ \ \ int\ length,\ int\ flags)
\f[]
.fi
.SH DESCRIPTION
.PP
Locks a index buffer so you can access its data.
Will return NULL if the parameters are invalid, if reading is requested
from a write only buffer and if the buffer is already locked.
.PP
\f[I]Parameters:\f[]
.IP \[bu] 2
buffer \- Index buffer to lock
.IP \[bu] 2
offset \- Element index of the start of the locked range
.IP \[bu] 2
length \- How many indices to lock
.IP \[bu] 2
flags \- ALLEGRO_LOCK_READONLY, ALLEGRO_LOCK_WRITEONLY or
ALLEGRO_LOCK_READWRITE
.SH SINCE
.PP
5.1.8
.SH SEE ALSO
.PP
ALLEGRO_INDEX_BUFFER(3alleg5), al_unlock_index_buffer(3alleg5)