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