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im_makerw - make an IMAGE writeable
#include <vips/vips.h>
int
im_makerw( image )
IMAGE *image;
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.
The function
returns 0 on success and -1 on error.
im_mmapin(3)
, im_mmapinrw(3)
,
im_fastlineuser(3)
.
National Gallery, 1992
J. Cupitt
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