libvips/libsrc/iofuncs/im_bits_of_fmt.c

65 lines
1.5 KiB
C
Raw Normal View History

2007-08-29 18:23:50 +02:00
/* Return number of bits of band format or -1 on error.
*
* 02/06/05 JF
* - original code
* 12/1/06
* - use a table
*/
/*
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
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <vips/vips.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
static const int bits[] = {
IM_BBITS_BYTE,
IM_BBITS_BYTE,
IM_BBITS_SHORT,
IM_BBITS_SHORT,
IM_BBITS_INT,
IM_BBITS_INT,
IM_BBITS_FLOAT,
IM_BBITS_COMPLEX,
IM_BBITS_DOUBLE,
IM_BBITS_DPCOMPLEX
};
/* Return number of pels bits for band format or -1 on error.
*/
int
im_bits_of_fmt( int bandfmt )
{
return( bandfmt < 0 || bandfmt > IM_BANDFMT_DPCOMPLEX ?
im_error( "im_bits_of_fmt",
_( "unsupported band format: %d" ), bandfmt ),
-1 :
bits[bandfmt] );
}