133 lines
3.0 KiB
C
133 lines
3.0 KiB
C
/* @(#) dir = 0:
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* @(#) For each vertical line, find the position of the first
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* @(#) non-zero pixel from the top. Output is USHORT with
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* @(#) width = input width, height = 1.
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* @(#)
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* @(#) dir = 1:
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* @(#) For each horizontal line, find the position of the first
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* @(#) non-zero pixel from the left. Output is USHORT with
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* @(#) width = 1, height = input height
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* @(#)
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* @(#) int im_profile( IMAGE *in, IMAGE *out, int dir )
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* @(#)
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* @(#) Returns 0 on success and non-zero on error
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*
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* 11/8/99 JC
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* - from im_cntlines()
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* 22/4/04
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* - now outputs horizontal/vertical image
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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 <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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int
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im_profile( IMAGE *in, IMAGE *out, int dir )
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{
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int x, y;
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unsigned short *buf;
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/* Check im.
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*/
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if( im_iocheck( in, out ) )
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return( -1 );
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if( in->Coding != IM_CODING_NONE || in->BandFmt != IM_BANDFMT_UCHAR ||
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in->Bands != 1 ) {
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im_errormsg( "im_profile: 1-band uchar uncoded only" );
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return( -1 );
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}
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if( dir != 0 && dir != 1 ) {
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im_errormsg( "im_profile: dir not 0 or 1" );
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return( -1 );
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}
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if( im_cp_desc( out, in ) )
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return( -1 );
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out->Type = IM_TYPE_HISTOGRAM;
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if( dir == 0 ) {
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out->Xsize = in->Xsize;
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out->Ysize = 1;
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}
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else {
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out->Xsize = 1;
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out->Ysize = in->Ysize;
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}
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out->BandFmt = IM_BANDFMT_USHORT;
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out->Bbits = IM_BBITS_SHORT;
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if( im_setupout( out ) )
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return( -1 );
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if( !(buf = IM_ARRAY( out, out->Xsize, unsigned short )) )
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return( -1 );
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if( dir == 0 ) {
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/* Find vertical lines.
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*/
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for( x = 0; x < in->Xsize; x++ ) {
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PEL *p = (PEL *) IM_IMAGE_ADDR( in, x, 0 );
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int lsk = IM_IMAGE_SIZEOF_LINE( in );
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for( y = 0; y < in->Ysize; y++ )
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if( p[y * lsk] )
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break;
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buf[x] = y;
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}
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if( im_writeline( 0, out, (PEL *) buf ) )
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return( -1 );
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}
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else {
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/* Count horizontal lines.
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*/
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for( y = 0; y < in->Ysize; y++ ) {
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PEL *p = (PEL *) IM_IMAGE_ADDR( in, 0, y );
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for( x = 0; x < in->Xsize; x++ )
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if( p[x] )
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break;
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buf[0] = x;
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if( im_writeline( y, out, (PEL *) buf ) )
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return( -1 );
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}
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}
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return( 0 );
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}
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