1 /***************************************************************************
2  * Copyright (c) 2024 Microsoft Corporation
3  *
4  * This program and the accompanying materials are made available under the
5  * terms of the MIT License which is available at
6  * https://opensource.org/licenses/MIT.
7  *
8  * SPDX-License-Identifier: MIT
9  **************************************************************************/
10 
11 
12 /**************************************************************************/
13 /**************************************************************************/
14 /**                                                                       */
15 /** GUIX Component                                                        */
16 /**                                                                       */
17 /**   Utility (Utility)                                                   */
18 /**                                                                       */
19 /**************************************************************************/
20 
21 #define GX_SOURCE_CODE
22 
23 
24 /* Include necessary system files.  */
25 
26 #include "gx_api.h"
27 #include "gx_utility.h"
28 
29 
30 /**************************************************************************/
31 /*                                                                        */
32 /*  FUNCTION                                               RELEASE        */
33 /*                                                                        */
34 /*    _gx_utility_rectangle_center                        PORTABLE C      */
35 /*                                                           6.1          */
36 /*  AUTHOR                                                                */
37 /*                                                                        */
38 /*    Kenneth Maxwell, Microsoft Corporation                              */
39 /*                                                                        */
40 /*  DESCRIPTION                                                           */
41 /*                                                                        */
42 /*    This service centers the rectangle within another rectangle.        */
43 /*                                                                        */
44 /*  INPUT                                                                 */
45 /*                                                                        */
46 /*    rectangle                             Rectangle to center           */
47 /*    within                                Rectangle to center within    */
48 /*                                                                        */
49 /*  OUTPUT                                                                */
50 /*                                                                        */
51 /*    None                                                                */
52 /*                                                                        */
53 /*  CALLS                                                                 */
54 /*                                                                        */
55 /*    None                                                                */
56 /*                                                                        */
57 /*  CALLED BY                                                             */
58 /*                                                                        */
59 /*    Application Code                                                    */
60 /*    GUIX Internal Code                                                  */
61 /*                                                                        */
62 /*  RELEASE HISTORY                                                       */
63 /*                                                                        */
64 /*    DATE              NAME                      DESCRIPTION             */
65 /*                                                                        */
66 /*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
67 /*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
68 /*                                            resulting in version 6.1    */
69 /*                                                                        */
70 /**************************************************************************/
_gx_utility_rectangle_center(GX_RECTANGLE * rectangle,GX_RECTANGLE * within)71 UINT  _gx_utility_rectangle_center(GX_RECTANGLE *rectangle, GX_RECTANGLE *within)
72 {
73 
74 INT x_space;
75 INT y_space;
76 INT x_delta;
77 INT y_delta;
78 
79     x_space = (((within -> gx_rectangle_right -
80                  within -> gx_rectangle_left) + 1) -
81                ((rectangle -> gx_rectangle_right -
82                  rectangle -> gx_rectangle_left) + 1)) / 2;
83 
84     y_space = (((within -> gx_rectangle_bottom -
85                  within -> gx_rectangle_top) + 1) -
86                ((rectangle -> gx_rectangle_bottom -
87                  rectangle -> gx_rectangle_top) + 1)) / 2;
88 
89     x_delta = within -> gx_rectangle_left + x_space - rectangle -> gx_rectangle_left;
90     y_delta = within -> gx_rectangle_top + y_space - rectangle -> gx_rectangle_top;
91 
92     rectangle -> gx_rectangle_left = (GX_VALUE)(rectangle -> gx_rectangle_left + x_delta);
93     rectangle -> gx_rectangle_top = (GX_VALUE)(rectangle -> gx_rectangle_top + y_delta);
94     rectangle -> gx_rectangle_right = (GX_VALUE)(rectangle -> gx_rectangle_right + x_delta);
95     rectangle -> gx_rectangle_bottom = (GX_VALUE)(rectangle -> gx_rectangle_bottom + y_delta);
96     return GX_SUCCESS;
97 }
98 
99