1 /**********
2 *
3 * Copyright (c) 2003, Division of Imaging Science and Biomedical Engineering,
4 * University of Manchester, UK. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without modification,
7 * are permitted provided that the following conditions are met:
8 *
9 * . Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * . Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * . Neither the name of the University of Manchester nor the names of its
17 * contributors may be used to endorse or promote products derived from this
18 * software without specific prior written permission.
19 *
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 **********
34 *
35 * Program : TINA
36 * File : $Source: /home/tina/cvs/tina-libs/tina/image/imgPrc_bshift.c,v $
37 * Date : $Date: 2003/09/22 16:09:02 $
38 * Version : $Revision: 1.4 $
39 * CVS Id : $Id: imgPrc_bshift.c,v 1.4 2003/09/22 16:09:02 tony Exp $
40 *
41 * Author : Legacy TINA
42 */
43
44 /**
45 * @file
46 * @brief Image (integer) shift by pixel copying.
47 *
48 */
49
50 #include "imgPrc_bshift.h"
51
52 #if HAVE_CONFIG_H
53 #include <config.h>
54 #endif
55
56 #include <math.h>
57 #include <tina/sys/sysDef.h>
58 #include <tina/sys/sysPro.h>
59 #include <tina/math/mathDef.h>
60 #include <tina/math/mathPro.h>
61 #include <tina/image/img_GenDef.h>
62 #include <tina/image/img_GenPro.h>
63
64 Imrect *im_bshift(Imrect * im, int y, int x)
65 {
66 Imrect *im2;
67 Imregion *roi;
68 double pixval;
69 int lx, ux, ly, uy;
70 int i, j, newx, newy;
71
72 roi = im->region;
73 im2 = im_alloc(im->height, im->width, roi, im->vtype);
74 lx = roi->lx;
75 ux = roi->ux;
76 ly = roi->ly;
77 uy = roi->uy;
78
79 for (i = ly; i < uy; i++)
80 {
81 for (j = lx; j < ux; j++)
82 {
83 newx = j + x;
84 if (newx >= ux)
85 newx -= (ux - lx);
86 if (newx < lx)
87 newx += (ux - lx);
88 newy = i + y;
89 if (newy >= uy)
90 newy -= (uy - ly);
91 if (newy < ly)
92 newy += (uy - ly);
93
94 IM_PIX_GET(im, i, j, pixval);
95 IM_PIX_SET(im2, newy, newx, pixval);
96 }
97 }
98 return (im2);
99 }
100
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