Atlas - SDL_evdev_capabilities.h
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1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4  Copyright (C) 2020 Collabora Ltd.
5
6  This software is provided 'as-is', without any express or implied
7  warranty.  In no event will the authors be held liable for any damages
8  arising from the use of this software.
9
10  Permission is granted to anyone to use this software for any purpose,
11  including commercial applications, and to alter it and redistribute it
12  freely, subject to the following restrictions:
13
14  1. The origin of this software must not be misrepresented; you must not
15     claim that you wrote the original software. If you use this software
16     in a product, an acknowledgment in the product documentation would be
17     appreciated but is not required.
18  2. Altered source versions must be plainly marked as such, and must not be
19     misrepresented as being the original software.
20  3. This notice may not be removed or altered from any source distribution.
21*/
22#include "SDL_internal.h"
23
24#ifndef SDL_evdev_capabilities_h_
25#define SDL_evdev_capabilities_h_
26
27#ifdef HAVE_LINUX_INPUT_H
28
29#include <linux/input.h>
30
31#ifndef INPUT_PROP_SEMI_MT
32#define INPUT_PROP_SEMI_MT          0x03
33#endif
34#ifndef INPUT_PROP_TOPBUTTONPAD
35#define INPUT_PROP_TOPBUTTONPAD     0x04
36#endif
37#ifndef INPUT_PROP_POINTING_STICK
38#define INPUT_PROP_POINTING_STICK   0x05
39#endif
40#ifndef INPUT_PROP_ACCELEROMETER
41#define INPUT_PROP_ACCELEROMETER    0x06
42#endif
43#ifndef INPUT_PROP_MAX
44#define INPUT_PROP_MAX 0x1f
45#endif
46
47// A device can be any combination of these classes
48typedef enum
49{
50    SDL_UDEV_DEVICE_UNKNOWN = 0x0000,
51    SDL_UDEV_DEVICE_MOUSE = 0x0001,
52    SDL_UDEV_DEVICE_KEYBOARD = 0x0002,
53    SDL_UDEV_DEVICE_JOYSTICK = 0x0004,
54    SDL_UDEV_DEVICE_SOUND = 0x0008,
55    SDL_UDEV_DEVICE_TOUCHSCREEN = 0x0010,
56    SDL_UDEV_DEVICE_ACCELEROMETER = 0x0020,
57    SDL_UDEV_DEVICE_TOUCHPAD = 0x0040,
58    SDL_UDEV_DEVICE_HAS_KEYS = 0x0080,
59    SDL_UDEV_DEVICE_VIDEO_CAPTURE = 0x0100,
60} SDL_UDEV_deviceclass;
61
62#define BITS_PER_LONG        (sizeof(unsigned long) * 8)
63#define NBITS(x)             ((((x)-1) / BITS_PER_LONG) + 1)
64#define EVDEV_OFF(x)         ((x) % BITS_PER_LONG)
65#define EVDEV_LONG(x)        ((x) / BITS_PER_LONG)
66#define test_bit(bit, array) ((array[EVDEV_LONG(bit)] >> EVDEV_OFF(bit)) & 1)
67
68extern int SDL_EVDEV_GuessDeviceClass(const unsigned long bitmask_props[NBITS(INPUT_PROP_MAX)],
69                                      const unsigned long bitmask_ev[NBITS(EV_MAX)],
70                                      const unsigned long bitmask_abs[NBITS(ABS_MAX)],
71                                      const unsigned long bitmask_key[NBITS(KEY_MAX)],
72                                      const unsigned long bitmask_rel[NBITS(REL_MAX)]);
73
74#endif // HAVE_LINUX_INPUT_H
75
76#endif // SDL_evdev_capabilities_h_
77
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