115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/* @(#) rint() an image ... no promotion, so output type == input type
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* @(#)
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* @(#) int
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* @(#) im_rint( in, out )
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* @(#) IMAGE *in, *out;
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* @(#)
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* @(#) Returns 0 on success and -1 on error
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* @(#)
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*
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* 20/6/02 JC
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* - adapted from im_floor()
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <assert.h>
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#include <vips/vips.h>
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#ifdef WITH_DMALLOC
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#include <dmalloc.h>
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#endif /*WITH_DMALLOC*/
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#define rint_loop(TYPE)\
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{\
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TYPE *p = (TYPE *) in;\
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TYPE *q = (TYPE *) out;\
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\
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for( x = 0; x < sz; x++ )\
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q[x] = IM_RINT( p[x] );\
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}
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/* rint a buffer of PELs.
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*/
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static void
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rint_gen( PEL *in, PEL *out, int width, IMAGE *im )
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{
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int x;
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int sz = width * im->Bands;
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switch( im->BandFmt ) {
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case IM_BANDFMT_FLOAT: rint_loop(float); break;
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case IM_BANDFMT_DOUBLE: rint_loop(double); break;
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case IM_BANDFMT_COMPLEX: sz *= 2; rint_loop(float); break;
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case IM_BANDFMT_DPCOMPLEX: sz *= 2; rint_loop(double); break;
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default:
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assert( 0 );
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}
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}
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/* rint of image.
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*/
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int
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im_rint( IMAGE *in, IMAGE *out )
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{
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/* Check args.
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*/
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if( in->Coding != IM_CODING_NONE ) {
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im_error( "im_rint", _( "not uncoded" ) );
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return( -1 );
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}
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/* Is this one of the int types? Degenerate to im_copy() if it
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* is.
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*/
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if( im_isint( in ) )
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return( im_copy( in, out ) );
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/* Output type == input type.
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*/
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if( im_cp_desc( out, in ) )
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return( -1 );
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/* Generate!
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*/
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if( im_wrapone( in, out,
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(im_wrapone_fn) rint_gen, in, NULL ) )
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return( -1 );
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return( 0 );
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}
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