| /* @(#) dir = 0: |
| * @(#) For each vertical line, find the position of the first |
| * @(#) non-zero pixel from the top. Output is USHORT with |
| * @(#) width = input width, height = 1. |
| * @(#) |
| * @(#) dir = 1: |
| * @(#) For each horizontal line, find the position of the first |
| * @(#) non-zero pixel from the left. Output is USHORT with |
| * @(#) width = 1, height = input height |
| * @(#) |
| * @(#) int im_profile( IMAGE *in, IMAGE *out, int dir ) |
| * @(#) |
| * @(#) Returns 0 on success and non-zero on error |
| * |
| * 11/8/99 JC |
| * - from im_cntlines() |
| * 22/4/04 |
| * - now outputs horizontal/vertical image |
| */ |
| |
| /* |
| |
| This file is part of VIPS. |
| |
| VIPS is free software; you can redistribute it and/or modify |
| it under the terms of the GNU Lesser General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| |
| */ |
| |
| /* |
| |
| These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk |
| |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif /*HAVE_CONFIG_H*/ |
| #include <vips/intl.h> |
| |
| #include <vips/vips.h> |
| |
| #ifdef WITH_DMALLOC |
| #include <dmalloc.h> |
| #endif /*WITH_DMALLOC*/ |
| |
| int |
| im_profile( IMAGE *in, IMAGE *out, int dir ) |
| { |
| int x, y; |
| unsigned short *buf; |
| |
| /* Check im. |
| */ |
| if( im_iocheck( in, out ) ) |
| return( -1 ); |
| if( in->Coding != IM_CODING_NONE || in->BandFmt != IM_BANDFMT_UCHAR || |
| in->Bands != 1 ) { |
| im_error( "im_profile", "%s", |
| _( "1-band uchar uncoded only" ) ); |
| return( -1 ); |
| } |
| if( dir != 0 && dir != 1 ) { |
| im_error( "im_profile", "%s", _( "dir not 0 or 1" ) ); |
| return( -1 ); |
| } |
| |
| if( im_cp_desc( out, in ) ) |
| return( -1 ); |
| out->Type = IM_TYPE_HISTOGRAM; |
| if( dir == 0 ) { |
| out->Xsize = in->Xsize; |
| out->Ysize = 1; |
| } |
| else { |
| out->Xsize = 1; |
| out->Ysize = in->Ysize; |
| } |
| out->BandFmt = IM_BANDFMT_USHORT; |
| if( im_setupout( out ) ) |
| return( -1 ); |
| if( !(buf = IM_ARRAY( out, out->Xsize, unsigned short )) ) |
| return( -1 ); |
| |
| if( dir == 0 ) { |
| /* Find vertical lines. |
| */ |
| for( x = 0; x < in->Xsize; x++ ) { |
| PEL *p = (PEL *) IM_IMAGE_ADDR( in, x, 0 ); |
| int lsk = IM_IMAGE_SIZEOF_LINE( in ); |
| |
| for( y = 0; y < in->Ysize; y++ ) |
| if( p[y * lsk] ) |
| break; |
| |
| buf[x] = y; |
| } |
| |
| if( im_writeline( 0, out, (PEL *) buf ) ) |
| return( -1 ); |
| } |
| else { |
| /* Count horizontal lines. |
| */ |
| for( y = 0; y < in->Ysize; y++ ) { |
| PEL *p = (PEL *) IM_IMAGE_ADDR( in, 0, y ); |
| |
| for( x = 0; x < in->Xsize; x++ ) |
| if( p[x] ) |
| break; |
| |
| buf[0] = x; |
| |
| if( im_writeline( y, out, (PEL *) buf ) ) |
| return( -1 ); |
| } |
| } |
| |
| |
| return( 0 ); |
| } |