im_mmapin  - memory maps a VASARI image file (read only) and returns an
       image descriptor.
       #include <vips/vips.h>
       IMAGE *im_mmapin(file_name)
       char *file_name;
       im_mmapin(3) opens a file for input. It has been replaced  by  im_open(
       file_name, "r" ).
       The function returns the image descriptor on success and NULL on error.
       im_open(3), im_close(3), im_mmapinrw(3), im_makerw(3).
       N. Dessipris
       N. Dessipris - 11/04/1990
                                 11 April 1990