mirror of
https://github.com/eddyem/eddys_snippets.git
synced 2025-12-06 10:45:12 +03:00
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/*
|
|
* dilation.h - inner part of function `dilation`
|
|
*
|
|
* Copyright 2013 Edward V. Emelianoff <eddy@sao.ru>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
* MA 02110-1301, USA.
|
|
*/
|
|
|
|
/*
|
|
* HERE'S NO ANY "FILE-GUARDS" BECAUSE FILE IS MULTIPLY INCLUDED!
|
|
* I use this because don't want to dive into depths of BOOST
|
|
*
|
|
* multi-including with different defines before - is a simplest way to
|
|
* modify simple code for avoiding extra if-then-else
|
|
*/
|
|
|
|
|
|
#if ! defined IM_UP && ! defined IM_DOWN // image without upper and lower borders
|
|
OMP_FOR()
|
|
for(y = 1; y < h; y++)
|
|
#endif
|
|
{
|
|
unsigned char *iptr = &image[W*y];
|
|
unsigned char *optr = &ret[W*y];
|
|
unsigned char p = DIL[*iptr]
|
|
#ifndef IM_UP
|
|
| iptr[-W]
|
|
#endif
|
|
#ifndef IM_DOWN
|
|
| iptr[W]
|
|
#endif
|
|
;
|
|
int x;
|
|
if(iptr[1] & 0x80) p |= 1;
|
|
*optr = p;
|
|
optr++; iptr++;
|
|
for(x = 1; x < w; x++, iptr++, optr++){
|
|
p = DIL[*iptr]
|
|
#ifndef IM_UP
|
|
| iptr[-W]
|
|
#endif
|
|
#ifndef IM_DOWN
|
|
| iptr[W]
|
|
#endif
|
|
;
|
|
if(iptr[1] & 0x80) p |= 1;
|
|
if(iptr[-1] & 1) p |= 0x80;
|
|
*optr = p;
|
|
}
|
|
p = DIL[*iptr]
|
|
#ifndef IM_UP
|
|
| iptr[-W]
|
|
#endif
|
|
#ifndef IM_DOWN
|
|
| iptr[W]
|
|
#endif
|
|
;
|
|
if(iptr[-1] & 1) p |= 0x80;
|
|
*optr = p;
|
|
optr++; iptr++;
|
|
}
|
|
|