125 lines
2.8 KiB
C
125 lines
2.8 KiB
C
/* As im_wrapmany, but just allow one input and one output.
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*
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* The types become:
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*
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* int im_wrapone( IMAGE *in, IMAGE *out,
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* im_wrapone_fn fn, void *a, void *b )
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*
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* where im_wrapone_fn has type:
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*
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* process_buffer( void *in, void *out, int n,
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* void *a, void *b )
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* 28/7/97 JC
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* - amazing error ... failed if or and ir were different sizes
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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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typedef struct {
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im_wrapone_fn fn; /* Function we call */
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void *a, *b; /* User values for function */
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} UserBundle;
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/* Build or->valid a line at a time from ir.
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*/
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static int
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process_region( REGION *or, void *seq, void *a, void *b )
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{
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REGION *ir = (REGION *) seq;
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UserBundle *bun = (UserBundle *) b;
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PEL *p, *q;
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int y;
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/* Prepare input region and make buffer pointers.
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*/
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if( im_prepare( ir, &or->valid ) )
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return( -1 );
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p = (PEL *) IM_REGION_ADDR( ir, or->valid.left, or->valid.top );
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q = (PEL *) IM_REGION_ADDR( or, or->valid.left, or->valid.top );
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/* Convert linewise.
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*/
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for( y = 0; y < or->valid.height; y++ ) {
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bun->fn( p, q, or->valid.width, bun->a, bun->b );
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p += IM_REGION_LSKIP( ir );
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q += IM_REGION_LSKIP( or );
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}
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return( 0 );
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}
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/* Wrap up as a partial.
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*/
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int
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im_wrapone( IMAGE *in, IMAGE *out, im_wrapone_fn fn, void *a, void *b )
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{
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UserBundle *bun = IM_NEW( out, UserBundle );
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/* Save args.
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*/
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if( !bun )
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return( -1 );
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bun->fn = fn;
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bun->a = a;
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bun->b = b;
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/* Check descriptors.
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*/
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if( im_piocheck( in, out ) )
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return( -1 );
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/* Hint demand style. Being a buffer processor, we are happiest with
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* thin strips.
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*/
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if( im_demand_hint( out, IM_THINSTRIP, in, NULL ) )
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return( -1 );
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/* Generate!
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*/
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if( im_generate( out,
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im_start_one, process_region, im_stop_one,
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in, bun ) )
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return( -1 );
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return( 0 );
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}
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