356 lines
6.6 KiB
C
356 lines
6.6 KiB
C
/* Test various predicates.
|
|
*
|
|
* J.Cupitt, 8/4/93.
|
|
* 13/10/95 JC
|
|
* - ANSIfied
|
|
* - im_ispoweroftwo() added
|
|
* 14/11/96 Jc
|
|
* - im_isjpeg() added
|
|
* 25/3/97 JC
|
|
* - im_isvips() added
|
|
* 14/4/97 JC
|
|
* - im_istifftiled() added
|
|
* 29/10/98 JC
|
|
* - im_isMSBfirst() and im_amiMSBfirst() added
|
|
* 16/6/99 JC
|
|
* - added im_existsf()
|
|
* 22/11/00 JC
|
|
* - added im_isppm()
|
|
* 23/4/01 JC
|
|
* - HAVE_TIFF turns on TIFFness
|
|
* 19/10/02 HB
|
|
* - PNG added
|
|
* 1/5/06
|
|
* - added exr
|
|
* 3/8/07
|
|
* - cleanups
|
|
* 22/5/08
|
|
* - image format stuff broken out
|
|
*/
|
|
|
|
/*
|
|
|
|
This file is part of VIPS.
|
|
|
|
VIPS is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
*/
|
|
|
|
/*
|
|
|
|
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
|
|
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif /*HAVE_CONFIG_H*/
|
|
#include <vips/intl.h>
|
|
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif /*HAVE_UNISTD_H*/
|
|
#ifdef HAVE_IO_H
|
|
#include <io.h>
|
|
#endif /*HAVE_IO_H*/
|
|
#include <string.h>
|
|
#include <limits.h>
|
|
|
|
#include <vips/vips.h>
|
|
#include <vips/internal.h>
|
|
|
|
#ifdef WITH_DMALLOC
|
|
#include <dmalloc.h>
|
|
#endif /*WITH_DMALLOC*/
|
|
|
|
/* Test BandFmt.
|
|
*/
|
|
int
|
|
im_isint( IMAGE *im )
|
|
{
|
|
switch( im->BandFmt ) {
|
|
case IM_BANDFMT_UCHAR:
|
|
case IM_BANDFMT_CHAR:
|
|
case IM_BANDFMT_USHORT:
|
|
case IM_BANDFMT_SHORT:
|
|
case IM_BANDFMT_UINT:
|
|
case IM_BANDFMT_INT:
|
|
return( 1 );
|
|
|
|
case IM_BANDFMT_FLOAT:
|
|
case IM_BANDFMT_DOUBLE:
|
|
case IM_BANDFMT_COMPLEX:
|
|
case IM_BANDFMT_DPCOMPLEX:
|
|
return( 0 );
|
|
|
|
default:
|
|
error_exit( "im_isint: unknown image BandFmt" );
|
|
/*NOTREACHED*/
|
|
return( -1 );
|
|
}
|
|
}
|
|
|
|
/* Test endianness of an image. SPARC is MSB first
|
|
*/
|
|
int
|
|
im_isMSBfirst( IMAGE *im )
|
|
{
|
|
if( im->magic == IM_MAGIC_SPARC )
|
|
return( 1 );
|
|
else
|
|
return( 0 );
|
|
}
|
|
|
|
/* Test this processor for endianness. True for SPARC order.
|
|
*/
|
|
int
|
|
im_amiMSBfirst( void )
|
|
{
|
|
int test;
|
|
unsigned char *p = (unsigned char *) &test;
|
|
|
|
test = 0;
|
|
p[0] = 255;
|
|
|
|
if( test == 255 )
|
|
return( 0 );
|
|
else
|
|
return( 1 );
|
|
}
|
|
|
|
int
|
|
im_isuint( IMAGE *im )
|
|
{
|
|
switch( im->BandFmt ) {
|
|
case IM_BANDFMT_UCHAR:
|
|
case IM_BANDFMT_USHORT:
|
|
case IM_BANDFMT_UINT:
|
|
return( 1 );
|
|
|
|
case IM_BANDFMT_INT:
|
|
case IM_BANDFMT_SHORT:
|
|
case IM_BANDFMT_CHAR:
|
|
case IM_BANDFMT_FLOAT:
|
|
case IM_BANDFMT_DOUBLE:
|
|
case IM_BANDFMT_COMPLEX:
|
|
case IM_BANDFMT_DPCOMPLEX:
|
|
return( 0 );
|
|
|
|
default:
|
|
error_exit( "im_isuint: unknown image BandFmt" );
|
|
/*NOTREACHED*/
|
|
return( -1 );
|
|
}
|
|
}
|
|
|
|
int
|
|
im_isfloat( IMAGE *im )
|
|
{
|
|
switch( im->BandFmt ) {
|
|
case IM_BANDFMT_FLOAT:
|
|
case IM_BANDFMT_DOUBLE:
|
|
return( 1 );
|
|
|
|
case IM_BANDFMT_UCHAR:
|
|
case IM_BANDFMT_CHAR:
|
|
case IM_BANDFMT_USHORT:
|
|
case IM_BANDFMT_SHORT:
|
|
case IM_BANDFMT_UINT:
|
|
case IM_BANDFMT_INT:
|
|
case IM_BANDFMT_COMPLEX:
|
|
case IM_BANDFMT_DPCOMPLEX:
|
|
return( 0 );
|
|
|
|
default:
|
|
error_exit( "im_isfloat: unknown image BandFmt" );
|
|
/*NOTREACHED*/
|
|
return( -1 );
|
|
}
|
|
}
|
|
|
|
int
|
|
im_isscalar( IMAGE *im )
|
|
{
|
|
switch( im->BandFmt ) {
|
|
case IM_BANDFMT_UCHAR:
|
|
case IM_BANDFMT_CHAR:
|
|
case IM_BANDFMT_USHORT:
|
|
case IM_BANDFMT_SHORT:
|
|
case IM_BANDFMT_UINT:
|
|
case IM_BANDFMT_INT:
|
|
case IM_BANDFMT_FLOAT:
|
|
case IM_BANDFMT_DOUBLE:
|
|
return( 1 );
|
|
|
|
case IM_BANDFMT_COMPLEX:
|
|
case IM_BANDFMT_DPCOMPLEX:
|
|
return( 0 );
|
|
|
|
default:
|
|
error_exit( "im_isscalar: unknown image BandFmt" );
|
|
/*NOTREACHED*/
|
|
return( -1 );
|
|
}
|
|
}
|
|
|
|
int
|
|
im_iscomplex( IMAGE *im )
|
|
{
|
|
switch( im->BandFmt ) {
|
|
case IM_BANDFMT_COMPLEX:
|
|
case IM_BANDFMT_DPCOMPLEX:
|
|
return( 1 );
|
|
|
|
case IM_BANDFMT_UCHAR:
|
|
case IM_BANDFMT_CHAR:
|
|
case IM_BANDFMT_USHORT:
|
|
case IM_BANDFMT_SHORT:
|
|
case IM_BANDFMT_UINT:
|
|
case IM_BANDFMT_INT:
|
|
case IM_BANDFMT_FLOAT:
|
|
case IM_BANDFMT_DOUBLE:
|
|
return( 0 );
|
|
|
|
default:
|
|
error_exit( "im_iscomplex: unknown image BandFmt" );
|
|
/*NOTREACHED*/
|
|
return( -1 );
|
|
}
|
|
}
|
|
|
|
/* Test for file exists.
|
|
*/
|
|
int
|
|
im_existsf( const char *name, ... )
|
|
{
|
|
va_list ap;
|
|
char buf1[PATH_MAX];
|
|
|
|
va_start( ap, name );
|
|
(void) im_vsnprintf( buf1, PATH_MAX - 1, name, ap );
|
|
va_end( ap );
|
|
|
|
/* Try that.
|
|
*/
|
|
if( !access( buf1, R_OK ) )
|
|
return( 1 );
|
|
|
|
return( 0 );
|
|
}
|
|
|
|
/* True if this IMAGE is a disc file of some sort.
|
|
*/
|
|
int
|
|
im_isfile( IMAGE *im )
|
|
{
|
|
switch( im->dtype ) {
|
|
case IM_MMAPIN:
|
|
case IM_MMAPINRW:
|
|
case IM_OPENOUT:
|
|
case IM_OPENIN:
|
|
return( 1 );
|
|
|
|
case IM_PARTIAL:
|
|
case IM_SETBUF:
|
|
case IM_SETBUF_FOREIGN:
|
|
case IM_NONE:
|
|
return( 0 );
|
|
|
|
default:
|
|
error_exit( "im_isfile: corrupt IMAGE descriptor" );
|
|
/*NOTREACHED*/
|
|
return( -1 );
|
|
}
|
|
}
|
|
|
|
/* True if this IMAGE is a partial of some sort.
|
|
*/
|
|
int
|
|
im_ispartial( IMAGE *im )
|
|
{
|
|
switch( im->dtype ) {
|
|
case IM_PARTIAL:
|
|
return( 1 );
|
|
|
|
case IM_SETBUF:
|
|
case IM_SETBUF_FOREIGN:
|
|
case IM_MMAPIN:
|
|
case IM_MMAPINRW:
|
|
case IM_OPENIN:
|
|
case IM_OPENOUT:
|
|
case IM_NONE:
|
|
return( 0 );
|
|
|
|
default:
|
|
error_exit( "im_ispartial: corrupt IMAGE descriptor" );
|
|
/*NOTREACHED*/
|
|
return( -1 );
|
|
}
|
|
}
|
|
|
|
/* True if an int is a power of two ... 1, 2, 4, 8, 16, 32, etc. Do with just
|
|
* integer arithmetic for portability. A previous Nicos version using doubles
|
|
* and log/log failed on x86 with rounding problems. Return 0 for not
|
|
* power of two, otherwise return the position of the set bit (numbering with
|
|
* bit 1 as the lsb).
|
|
*/
|
|
int
|
|
im_ispoweroftwo( int p )
|
|
{
|
|
int i, n;
|
|
|
|
/* Count set bits. Could use a LUT, I guess.
|
|
*/
|
|
for( i = 0, n = 0; p; i++, p >>= 1 )
|
|
if( p & 1 )
|
|
n++;
|
|
|
|
/* Should be just one set bit.
|
|
*/
|
|
if( n == 1 )
|
|
/* Return position of bit.
|
|
*/
|
|
return( i );
|
|
else
|
|
return( 0 );
|
|
}
|
|
|
|
int
|
|
im_isvips( const char *filename )
|
|
{
|
|
unsigned char buf[4];
|
|
|
|
if( im__get_bytes( filename, buf, 4 ) ) {
|
|
if( buf[0] == 0x08 && buf[1] == 0xf2 &&
|
|
buf[2] == 0xa6 && buf[3] == 0xb6 )
|
|
/* SPARC-order VIPS image.
|
|
*/
|
|
return( 1 );
|
|
else if( buf[3] == 0x08 && buf[2] == 0xf2 &&
|
|
buf[1] == 0xa6 && buf[0] == 0xb6 )
|
|
/* INTEL-order VIPS image.
|
|
*/
|
|
return( 1 );
|
|
}
|
|
|
|
return( 0 );
|
|
}
|