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 /**   System Management (System)                                          */
18 /**                                                                       */
19 /**************************************************************************/
20 
21 #define GX_SOURCE_CODE
22 
23 
24 /* Include necessary system files.  */
25 
26 #include "gx_api.h"
27 #include "gx_system.h"
28 
29 /**************************************************************************/
30 /*                                                                        */
31 /*  FUNCTION                                               RELEASE        */
32 /*                                                                        */
33 /*    _gx_system_pen_speed_update                         PORTABLE C      */
34 /*                                                           6.1          */
35 /*  AUTHOR                                                                */
36 /*                                                                        */
37 /*    Kenneth Maxwell, Microsoft Corporation                              */
38 /*                                                                        */
39 /*  DESCRIPTION                                                           */
40 /*                                                                        */
41 /*    This service sends the specified event for processing.              */
42 /*                                                                        */
43 /*  INPUT                                                                 */
44 /*                                                                        */
45 /*    event                                 Pointer to event              */
46 /*                                                                        */
47 /*  OUTPUT                                                                */
48 /*                                                                        */
49 /*    status                                Completion status             */
50 /*                                                                        */
51 /*  CALLS                                                                 */
52 /*                                                                        */
53 /*    GX_ABS                                Compute the absolute value    */
54 /*    tx_queue_send                         Send message through ThreadX  */
55 /*                                            queue                       */
56 /*                                                                        */
57 /*  CALLED BY                                                             */
58 /*                                                                        */
59 /*    _gx_system_event_fold                 Fold GUIX system events       */
60 /*    _gx_system_event_send                 Send GUIX system event        */
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_system_pen_speed_update(GX_POINT * current)71 VOID _gx_system_pen_speed_update(GX_POINT *current)
72 {
73 ULONG current_clock;
74 
75 #ifdef GX_THREADX_BINDING
76     current_clock = tx_time_get();
77 #else
78     current_clock = GX_SYSTEM_TIME_GET;
79 #endif
80 
81     _gx_system_clock_delta = (LONG)(current_clock - _gx_system_last_clock);
82 
83     if (_gx_system_clock_delta > 0)
84     {
85         if (_gx_system_clock_delta < (LONG)_gx_system_pen_configuration.gx_pen_configuration_max_pen_speed_ticks)
86         {
87             _gx_system_pen_speed_x = GX_FIXED_VAL_MAKE(current -> gx_point_x - _gx_system_last_pen_point.gx_point_x);
88             _gx_system_pen_speed_x /= _gx_system_clock_delta;
89             _gx_system_pen_speed_y = GX_FIXED_VAL_MAKE(current -> gx_point_y - _gx_system_last_pen_point.gx_point_y);
90             _gx_system_pen_speed_y /= _gx_system_clock_delta;
91         }
92         else
93         {
94             _gx_system_pen_speed_x = _gx_system_pen_speed_y = 0;
95         }
96         _gx_system_last_clock = current_clock;
97         _gx_system_last_pen_point = *current;
98     }
99 }
100 
101