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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


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