IM_IOCHECK(3) IM_IOCHECK(3)
NAME
im_pincheck, im_poutcheck, im_piocheck - checks image descriptors for PIO
SYNOPSIS
#include <vips/vips.h> int im_pincheck( in ) IMAGE *in; int im_poutcheck( out ) IMAGE *out; int im_piocheck( in, out) IMAGE *in, *out;
DESCRIPTION
im_pincheck(3) checks that an image descriptor is suitable for PIO input. If the descriptor is IM_OPENOUT and the descriptor has been written to, it is automatically `rewound,' that is, it is closed and reopened as an IM_MMAPIN descriptor. im_poutcheck(3) checks that a descriptor is suitable for PIO output. im_piocheck(3) simply calls in_pincheck(3) for image in and im_poutcheck(3) for image out.
RETURN VALUE
All functions returns 0 on success and -1 on error.
SEE ALSO
im_generate(3), im_open(3).
COPYRIGHT
National Gallery
AUTHOR
J. Cupitt - 23/7/93 11 April 1990 IM_IOCHECK(3)
im_piocheck 7.14.5 - Generated Mon Sep 8 07:32:18 CDT 2008