89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/* @(#) combine two masks. Result mask is made and returned.
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* @(#) Pass in the name to set in the creation of the mask.
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* @(#) DOUBLEMASK *
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* @(#) im_matcat( in1, in2, name );
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* @(#) DOUBLEMASK *in1, *in2;
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* @(#) char *name;
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* @(#)
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* @(#) return NULL for error.
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*
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* 1994, K. Martinez
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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 <string.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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/* MATRIX concatenate (join columns ie add mask to bottom of another)
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*/
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DOUBLEMASK *
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im_matcat( DOUBLEMASK *in1, DOUBLEMASK *in2, const char *name )
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{
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int newxsize, newysize;
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DOUBLEMASK *mat;
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double *out;
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/* matrices must be same width
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*/
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if( in1->xsize != in2->xsize ) {
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im_error( "im_matcat", "%s", _( "matrices must be same width" ) );
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return( NULL );
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}
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newxsize = in1->xsize;
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newysize = in1->ysize + in2->ysize;
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/* Allocate output matrix.
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*/
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if( !(mat = im_create_dmask( name, newxsize, newysize )) ) {
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im_error( "im_matcat", "%s", _( "unable to allocate output matrix" ) );
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return( NULL );
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}
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/* copy first matrix then add second on the end
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*/
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memcpy( mat->coeff, in1->coeff,
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in1->xsize * in1->ysize * sizeof( double ) );
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out = mat->coeff + in1->xsize * in1->ysize;
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memcpy( out, in2->coeff,
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in2->xsize * in2->ysize * sizeof( double ) );
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return( mat );
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}
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