1 /*
2 Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
3
4 This software is provided 'as-is', without any express or implied
5 warranty. In no event will the authors be held liable for any damages
6 arising from the use of this software.
7
8 Permission is granted to anyone to use this software for any purpose,
9 including commercial applications, and to alter it and redistribute it
10 freely.
11 */
12
13 /* Simple test of the SDL sensor code */
14
15 #include "SDL.h"
16
GetSensorTypeString(SDL_SensorType type)17 static const char *GetSensorTypeString(SDL_SensorType type)
18 {
19 static char unknown_type[64];
20
21 switch (type)
22 {
23 case SDL_SENSOR_INVALID:
24 return "SDL_SENSOR_INVALID";
25 case SDL_SENSOR_UNKNOWN:
26 return "SDL_SENSOR_UNKNOWN";
27 case SDL_SENSOR_ACCEL:
28 return "SDL_SENSOR_ACCEL";
29 case SDL_SENSOR_GYRO:
30 return "SDL_SENSOR_GYRO";
31 default:
32 SDL_snprintf(unknown_type, sizeof(unknown_type), "UNKNOWN (%d)", type);
33 return unknown_type;
34 }
35 }
36
HandleSensorEvent(SDL_SensorEvent * event)37 static void HandleSensorEvent(SDL_SensorEvent *event)
38 {
39 SDL_Sensor *sensor = SDL_SensorFromInstanceID(event->which);
40 if (!sensor) {
41 SDL_Log("Couldn't get sensor for sensor event\n");
42 return;
43 }
44
45 switch (SDL_SensorGetType(sensor)) {
46 case SDL_SENSOR_ACCEL:
47 SDL_Log("Accelerometer update: %.2f, %.2f, %.2f\n", event->data[0], event->data[1], event->data[2]);
48 break;
49 case SDL_SENSOR_GYRO:
50 SDL_Log("Gyro update: %.2f, %.2f, %.2f\n", event->data[0], event->data[1], event->data[2]);
51 break;
52 default:
53 SDL_Log("Sensor update for sensor type %s\n", GetSensorTypeString(SDL_SensorGetType(sensor)));
54 break;
55 }
56 }
57
58 int
main(int argc,char ** argv)59 main(int argc, char **argv)
60 {
61 int i;
62 int num_sensors, num_opened;
63
64 /* Load the SDL library */
65 if (SDL_Init(SDL_INIT_SENSOR) < 0) {
66 SDL_Log("Couldn't initialize SDL: %s\n", SDL_GetError());
67 return (1);
68 }
69
70 num_sensors = SDL_NumSensors();
71 num_opened = 0;
72
73 SDL_Log("There are %d sensors available\n", num_sensors);
74 for (i = 0; i < num_sensors; ++i) {
75 SDL_Log("Sensor %d: %s, type %s, platform type %d\n",
76 SDL_SensorGetDeviceInstanceID(i),
77 SDL_SensorGetDeviceName(i),
78 GetSensorTypeString(SDL_SensorGetDeviceType(i)),
79 SDL_SensorGetDeviceNonPortableType(i));
80
81 if (SDL_SensorGetDeviceType(i) != SDL_SENSOR_UNKNOWN) {
82 SDL_Sensor *sensor = SDL_SensorOpen(i);
83 if (sensor == NULL) {
84 SDL_Log("Couldn't open sensor %d: %s\n", SDL_SensorGetDeviceInstanceID(i), SDL_GetError());
85 } else {
86 ++num_opened;
87 }
88 }
89 }
90 SDL_Log("Opened %d sensors\n", num_opened);
91
92 if (num_opened > 0) {
93 SDL_bool done = SDL_FALSE;
94 SDL_Event event;
95
96 SDL_CreateWindow("Sensor Test", 0, 0, 0, 0, SDL_WINDOW_FULLSCREEN_DESKTOP);
97 while (!done) {
98 while (SDL_PollEvent(&event) > 0) {
99 switch (event.type) {
100 case SDL_SENSORUPDATE:
101 HandleSensorEvent(&event.sensor);
102 break;
103 case SDL_MOUSEBUTTONUP:
104 case SDL_KEYUP:
105 case SDL_QUIT:
106 done = SDL_TRUE;
107 break;
108 default:
109 break;
110 }
111 }
112 }
113 }
114
115 SDL_Quit();
116 return (0);
117 }
118