libvips/libsrc/arithmetic/im_ceil.c

115 lines
2.5 KiB
C

/* @(#) ceil() an image ... no promotion, so output type == input type
* @(#)
* @(#) int
* @(#) im_ceil( in, out )
* @(#) IMAGE *in, *out;
* @(#)
* @(#) Returns 0 on success and -1 on error
* @(#)
*
* 20/6/02 JC
* - adapted from im_abs()
*/
/*
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 <stdlib.h>
#include <math.h>
#include <assert.h>
#include <vips/vips.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif /*WITH_DMALLOC*/
#define ceil_loop(TYPE)\
{\
TYPE *p = (TYPE *) in;\
TYPE *q = (TYPE *) out;\
\
for( x = 0; x < sz; x++ )\
q[x] = ceil( p[x] );\
}
/* Ceil a buffer of PELs.
*/
static void
ceil_gen( PEL *in, PEL *out, int width, IMAGE *im )
{
int x;
int sz = width * im->Bands;
switch( im->BandFmt ) {
case IM_BANDFMT_FLOAT: ceil_loop(float); break;
case IM_BANDFMT_DOUBLE: ceil_loop(double); break;
case IM_BANDFMT_COMPLEX: sz *= 2; ceil_loop(float); break;
case IM_BANDFMT_DPCOMPLEX: sz *= 2; ceil_loop(double); break;
default:
assert( 0 );
}
}
/* Ceil of image.
*/
int
im_ceil( IMAGE *in, IMAGE *out )
{
/* Check args.
*/
if( in->Coding != IM_CODING_NONE ) {
im_error( "im_ceil", "%s", _( "not uncoded" ) );
return( -1 );
}
/* Is this one of the int types? Degenerate to im_copy() if it
* is.
*/
if( im_isint( in ) )
return( im_copy( in, out ) );
/* Output type == input type.
*/
if( im_cp_desc( out, in ) )
return( -1 );
/* Generate!
*/
if( im_wrapone( in, out,
(im_wrapone_fn) ceil_gen, in, NULL ) )
return( -1 );
return( 0 );
}