163 lines
3.9 KiB
C
163 lines
3.9 KiB
C
/* @(#) Function to perform a band-wise join of two images. If the two images
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* @(#) have n and m bands respectively, then the output image will have n+m
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* @(#) bands, with the first n coming from the first image and the last m
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* @(#) from the second. Works for any image type.
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* @(#)
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* @(#) Function im_bandjoin() assumes that the imin image
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* @(#) is either memory mapped or in the buffer pimin->data.
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* @(#)
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* @(#) int im_bandjoin(imin1, imin2, imout)
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* @(#) IMAGE *imin1, *imin2, *imout;
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* @(#)
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* @(#) All functions return 0 on success and -1 on error
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* @(#)
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*
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* Copyright: 1990, J. Cupitt
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*
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* Author: J. Cupitt
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* Written on: 12/02/1990
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* Modified on : 07/03/1991, by N. Dessipris, history removed
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* 27/10/93 JC
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* - adapted for partials
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* - Nicos formatting removed
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* - ANSIfied
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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 <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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/* Bandjoin generate function.
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*/
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static int
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bandjoin_gen( REGION *or, void *seq, void *a, void *b )
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{
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REGION **ir = (REGION **) seq;
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Rect *r = &or->valid;
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int le = r->left;
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int ri = IM_RECT_RIGHT(r);
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int to = r->top;
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int bo = IM_RECT_BOTTOM(r);
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int x, y, z;
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int i1s = IM_IMAGE_SIZEOF_PEL( ir[0]->im );
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int i2s = IM_IMAGE_SIZEOF_PEL( ir[1]->im );
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/* Ask for input we need.
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*/
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if( im_prepare( ir[0], r ) )
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return( -1 );
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if( im_prepare( ir[1], r ) )
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return( -1 );
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/* Perform join.
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*/
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for( y = to; y < bo; y++ ) {
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PEL *i1 = (PEL *) IM_REGION_ADDR( ir[0], le, y );
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PEL *i2 = (PEL *) IM_REGION_ADDR( ir[1], le, y );
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PEL *q = (PEL *) IM_REGION_ADDR( or, le, y );
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for( x = le; x < ri; x++ ) {
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/* Copy bytes from first file.
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*/
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for( z = 0; z < i1s; z++ )
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*q++ = *i1++;
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/* Copy bytes from in2.
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*/
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for( z = 0; z < i2s; z++ )
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*q++ = *i2++;
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}
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}
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return( 0 );
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}
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/* Join two images. out->Bands = in1->Bands + in2->Bands. in1 goes first in
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* the list.
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*/
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int
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im_bandjoin( IMAGE *in1, IMAGE *in2, IMAGE *out )
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{
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IMAGE **in;
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/* Check our args.
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*/
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if( im_piocheck( in1, out ) )
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return( -1 );
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if( im_piocheck( in2, out ) )
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return( -1 );
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if( in1->Xsize != in2->Xsize ||
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in1->Ysize != in2->Ysize ) {
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im_errormsg( "im_bandjoin: images not same size" );
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return( -1 );
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}
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if( in1->BandFmt != in2->BandFmt ) {
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im_errormsg( "im_bandjoin: images not same type" );
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return( -1 );
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}
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if( in1->Coding != IM_CODING_NONE || in2->Coding != IM_CODING_NONE ) {
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im_errormsg( "im_bandjoin: input coded" );
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return( -1 );
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}
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/* Set up the output header.
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*/
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if( im_cp_descv( out, in1, in2, NULL ) )
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return( -1 );
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out->Bands = in1->Bands + in2->Bands;
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/* Set demand hints.
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*/
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if( im_demand_hint( out, IM_THINSTRIP, in1, in2, NULL ) )
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return( -1 );
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/* Make input array.
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*/
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if( !(in = im_allocate_input_array( out, in1, in2, NULL )) )
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return( -1 );
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/* Make output image.
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*/
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if( im_generate( out,
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im_start_many, bandjoin_gen, im_stop_many, in, NULL ) )
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return( -1 );
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return( 0 );
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}
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