IM_ISINT(3)

NAME
im_isint, im_ispng, im_isuint, im_isfloat, im_iscomplex, im_istiff, istifftiled, im_isjpeg, im_isfile, im_ispartial, im_isvips, im_isMSBfirst, im_fexists, im_amiMSBfirst - classify image types

SYNOPSIS
#include <vips/vips.h> int im_isMSBfirst( im )
IMAGE *im; int im_amiMSBfirst( void ) int im_fexists( const char *filename, ... ) int im_istiff( filename )
char *filename; int im_istifftiled( filename )
char *filename; int im_isjpeg( filename )
char *filename; int im_ispng( filename )
char *filename; int im_isppm( filename )
char *filename; int im_isvips( filename )
char *filename; int im_isfile( im )
IMAGE *im; int im_ispartial( im )
IMAGE *im; int im_isint( im )
IMAGE *im; int im_isuint( im )
IMAGE *im; int im_isfloat( im )
IMAGE *im; int im_iscomplex( im )
IMAGE *im;

DESCRIPTION
im_fexists(3) returns non-zero if the named file exists and is readable. Args as printf(3). im_istiff(3) tests a file for tiff-ness. im_istifftiled(3) tests a file for tiff-tiled-ness. im_isjpeg(3) tests a file for jpeg-ness. im_ispng(3) tests a file for png-ness. im_isppm(3) tests a file for PPM/PGM/PBM-ness. im_isvips(3) tests a file for vips-ness. im_isMSBfirst(3) returns true (1) if the file is in most-significant-byte first form. This is the byte order used on the SPARC architecture, and others. It returns false (0)for intel-order images. im_amiMSBfirst(3) returns true (1) if this processor is MSB first. im_isfile(3) returns true if the descriptor corresponds to some disc object, that is, was opened with modes "r", "rw" or "w". im_ispartial(3) returns true if the descriptor is partial, that is, was opened with mode "p". The rest of these functions test im->BandFmt, returning logical truth (non-zero) if BandFmt is one of a number of possibles, and returning zero if it is not. im_isint(3) (is integer type) returns true if im->BandFmt is one of FMTUCHAR, FMTCHAR, FMTUSHORT, FMTSHORT, FMTUINT or FMTINT. im_isuint(3) (is unsigned integer type) returns true if im->BandFmt is one of FMTUCHAR, FMTUSHORT or FMTUINT. im_isfloat(3) (is floating point type) returns true if im->BandFmt is one of FMTFLOAT or FMTDOUBLE. im_iscomplex(3) (is complex type) returns true if im->BandFmt is one of FMTCOMPLEX or FMTDPCOMPLEX.

COPYRIGHT
National Gallery, 1993

SEE ALSO
`VIPS Library Programmers' Guide,' in accompanying documentation. im_tiff2vips(3), im_jpeg2vips(3)

AUTHOR
J. Cupitt - 23/7/93