.TH IM_MAKERW 3 "22 April 1992"
.SH NAME
im_makerw \- make an IMAGE writeable
.SH SYNOPSIS
#include <vips/vips.h>

int im_makerw( image )
.br
IMAGE *image;
.SH DESCRIPTION
im_makerw(3) attempts to make image writeable, ready for an in-place operation.
Its actions are just as those for im_incheck(3), except that descriptors which
after im_incheck(3) end up as IM_MMAPIN descriptors, magically become
IM_MMAPINRW descriptors.

Extreme caution is urged! You can permanently damage valuable data with this
call. 
.SH RETURN VALUE
The function returns 0 on success and -1 on error.
.SH SEE\ ALSO
im_mmapin(3), im_mmapinrw(3), im_fastlineuser(3).
.SH COPYRIGHT
.br
National Gallery, 1992
.SH AUTHOR
J. Cupitt