IM_SETUPOUT(3)

NAME
im_setupout - set up an image descriptor for WIO output

SYNOPSIS
#include <vips/vips.h> int im_setupout(image)
IMAGE *image;

DESCRIPTION
im_setupout(3) makes a descriptor ready for WIO writing. If the descriptor is a memory buffer, enough memory is allocated to be able to hold all of the pels of the image. If the descriptor is an output file, then the header is written to disc. See `VIPS Library Programmers' Guide,' in the accompanying documentation for a guide to the use of this call --- but typically, for WIO, you should have
    int
    im_wombat( in, out )
    IMAGE *in, *out;
    {
        if( im_iocheck( in, out ) )
            return( -1 );
        ... check parameters, check image descriptors
        ... for type-compatibility, etc. etc.
        if( im_cp_desc( out, in ) )
            return( -1 );
        ... set fields in out for the type of image you
        ... wish to write
        if( im_setupout( out ) )
            return( -1 );
        ... process from input to output, reading from in->data
    ... and writing to out with im_writeline(3)
        return( 0 );
    }

RETURN VALUE
The function returns 0 on success and -1 on error.

SEE ALSO
im_cp_desc(3), im_iocheck(3).

COPYRIGHT
N. Dessipris

AUTHOR
N. Dessipris - 11/04/1990, updated on 22/04/1991