128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
|
/* Wrap an image so that what was the origin is at (x,y).
|
||
|
|
*
|
||
|
|
* int im_wrap( IMAGE *in, IMAGE *out, int x, int y );
|
||
|
|
*
|
||
|
|
* All functions return 0 on success and -1 on error
|
||
|
|
*
|
||
|
|
* Copyright: 2008, Nottingham Trent University
|
||
|
|
* Author: Tom Vajzovic
|
||
|
|
* Written on: 2008-01-15
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
|
||
|
|
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 <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include <vips/vips.h>
|
||
|
|
|
||
|
|
#ifdef WITH_DMALLOC
|
||
|
|
#include <dmalloc.h>
|
||
|
|
#endif /*WITH_DMALLOC*/
|
||
|
|
|
||
|
|
static int wrap( REGION *out, void *seq, void *a, void *b ){
|
||
|
|
#define IM ((IMAGE*)a)
|
||
|
|
#define X (((int*)b)[0])
|
||
|
|
#define Y (((int*)b)[1])
|
||
|
|
int left= out-> valid. left - X;
|
||
|
|
int top= out-> valid. top - Y;
|
||
|
|
int right= left + out-> valid. width;
|
||
|
|
int bot= top + out-> valid. height;
|
||
|
|
Rect source_a= {
|
||
|
|
left: IM-> Xsize + left,
|
||
|
|
top: IM-> Ysize + top,
|
||
|
|
width: 0 < right ? -left : out-> valid. width,
|
||
|
|
height: 0 < bot ? -top : out-> valid. height
|
||
|
|
};
|
||
|
|
Rect source_b= {
|
||
|
|
left: source_a. left,
|
||
|
|
top: 0 > top ? 0 : top,
|
||
|
|
width: source_a. width,
|
||
|
|
height: 0 > top ? bot : out-> valid. height
|
||
|
|
};
|
||
|
|
Rect source_c= {
|
||
|
|
left: 0 > left ? 0 : left,
|
||
|
|
top: source_a. top,
|
||
|
|
width: 0 > left ? right : out-> valid. width,
|
||
|
|
height: source_a. height
|
||
|
|
};
|
||
|
|
Rect source_d= {
|
||
|
|
left: source_c. left,
|
||
|
|
top: source_b. top,
|
||
|
|
width: source_c. width,
|
||
|
|
height: source_b. height
|
||
|
|
};
|
||
|
|
if( 0 > left ){
|
||
|
|
if( 0 > top && im_prepare_to( (REGION*)seq, out, & source_a,
|
||
|
|
out-> valid. left, out-> valid. top ))
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
if( 0 < bot && im_prepare_to( (REGION*)seq, out, & source_b,
|
||
|
|
out-> valid. left, 0 > top ? Y : out-> valid. top ))
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
if( 0 < right ){
|
||
|
|
if( 0 > top && im_prepare_to( (REGION*)seq, out, & source_c,
|
||
|
|
0 > left ? X : out-> valid. left, out-> valid. top ))
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
if( 0 < bot && im_prepare_to( (REGION*)seq, out, & source_d,
|
||
|
|
0 > left ? X : out-> valid. left, 0 > top ? Y : out-> valid. top ))
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
#undef IM
|
||
|
|
#undef X
|
||
|
|
#undef Y
|
||
|
|
}
|
||
|
|
|
||
|
|
int im_wrap( IMAGE *in, IMAGE *out, int x, int y ){
|
||
|
|
if( im_piocheck( in, out ))
|
||
|
|
return -1;
|
||
|
|
{
|
||
|
|
int *params= IM_ARRAY( out, 2, int );
|
||
|
|
if( ! params )
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
params[ 0 ]= x % in-> Xsize;
|
||
|
|
params[ 1 ]= y % in-> Ysize;
|
||
|
|
if( 0 > x )
|
||
|
|
params[ 0 ]+= in-> Xsize;
|
||
|
|
if( 0 > y )
|
||
|
|
params[ 1 ]+= in-> Ysize;
|
||
|
|
|
||
|
|
return im_cp_desc( out, in )
|
||
|
|
|| im_demand_hint( out, IM_THINSTRIP, in, NULL )
|
||
|
|
|| im_generate( out, im_start_one, wrap, im_stop_one, (void*)in, (void*)params );
|
||
|
|
}
|
||
|
|
}
|