SDL  2.0
SDL_joystick.h
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1 /*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
4 
5  This software is provided 'as-is', without any express or implied
6  warranty. In no event will the authors be held liable for any damages
7  arising from the use of this software.
8 
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12 
13  1. The origin of this software must not be misrepresented; you must not
14  claim that you wrote the original software. If you use this software
15  in a product, an acknowledgment in the product documentation would be
16  appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18  misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20 */
21 
22 /**
23  * \file SDL_joystick.h
24  *
25  * Include file for SDL joystick event handling
26  *
27  * The term "device_index" identifies currently plugged in joystick devices between 0 and SDL_NumJoysticks(), with the exact joystick
28  * behind a device_index changing as joysticks are plugged and unplugged.
29  *
30  * The term "instance_id" is the current instantiation of a joystick device in the system, if the joystick is removed and then re-inserted
31  * then it will get a new instance_id, instance_id's are monotonically increasing identifiers of a joystick plugged in.
32  *
33  * The term JoystickGUID is a stable 128-bit identifier for a joystick device that does not change over time, it identifies class of
34  * the device (a X360 wired controller for example). This identifier is platform dependent.
35  *
36  *
37  */
38 
39 #ifndef SDL_joystick_h_
40 #define SDL_joystick_h_
41 
42 #include "SDL_stdinc.h"
43 #include "SDL_error.h"
44 
45 #include "begin_code.h"
46 /* Set up for C function definitions, even when using C++ */
47 #ifdef __cplusplus
48 extern "C" {
49 #endif
50 
51 /**
52  * \file SDL_joystick.h
53  *
54  * In order to use these functions, SDL_Init() must have been called
55  * with the ::SDL_INIT_JOYSTICK flag. This causes SDL to scan the system
56  * for joysticks, and load appropriate drivers.
57  *
58  * If you would like to receive joystick updates while the application
59  * is in the background, you should set the following hint before calling
60  * SDL_Init(): SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS
61  */
62 
63 /**
64  * The joystick structure used to identify an SDL joystick
65  */
66 struct _SDL_Joystick;
67 typedef struct _SDL_Joystick SDL_Joystick;
68 
69 /* A structure that encodes the stable unique id for a joystick device */
70 typedef struct {
71  Uint8 data[16];
73 
74 /**
75  * This is a unique ID for a joystick for the time it is connected to the system,
76  * and is never reused for the lifetime of the application. If the joystick is
77  * disconnected and reconnected, it will get a new ID.
78  *
79  * The ID value starts at 0 and increments from there. The value -1 is an invalid ID.
80  */
82 
83 typedef enum
84 {
96 
97 typedef enum
98 {
103  SDL_JOYSTICK_POWER_FULL, /* <= 100% */
107 
108 /* Function prototypes */
109 
110 /**
111  * Locking for multi-threaded access to the joystick API
112  *
113  * If you are using the joystick API or handling events from multiple threads
114  * you should use these locking functions to protect access to the joysticks.
115  *
116  * In particular, you are guaranteed that the joystick list won't change, so
117  * the API functions that take a joystick index will be valid, and joystick
118  * and game controller events will not be delivered.
119  */
120 extern DECLSPEC void SDLCALL SDL_LockJoysticks(void);
121 extern DECLSPEC void SDLCALL SDL_UnlockJoysticks(void);
122 
123 /**
124  * Count the number of joysticks attached to the system right now
125  */
126 extern DECLSPEC int SDLCALL SDL_NumJoysticks(void);
127 
128 /**
129  * Get the implementation dependent name of a joystick.
130  * This can be called before any joysticks are opened.
131  * If no name can be found, this function returns NULL.
132  */
133 extern DECLSPEC const char *SDLCALL SDL_JoystickNameForIndex(int device_index);
134 
135 /**
136  * Get the player index of a joystick, or -1 if it's not available
137  * This can be called before any joysticks are opened.
138  */
139 extern DECLSPEC int SDLCALL SDL_JoystickGetDevicePlayerIndex(int device_index);
140 
141 /**
142  * Return the GUID for the joystick at this index
143  * This can be called before any joysticks are opened.
144  */
146 
147 /**
148  * Get the USB vendor ID of a joystick, if available.
149  * This can be called before any joysticks are opened.
150  * If the vendor ID isn't available this function returns 0.
151  */
152 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetDeviceVendor(int device_index);
153 
154 /**
155  * Get the USB product ID of a joystick, if available.
156  * This can be called before any joysticks are opened.
157  * If the product ID isn't available this function returns 0.
158  */
159 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetDeviceProduct(int device_index);
160 
161 /**
162  * Get the product version of a joystick, if available.
163  * This can be called before any joysticks are opened.
164  * If the product version isn't available this function returns 0.
165  */
167 
168 /**
169  * Get the type of a joystick, if available.
170  * This can be called before any joysticks are opened.
171  */
173 
174 /**
175  * Get the instance ID of a joystick.
176  * This can be called before any joysticks are opened.
177  * If the index is out of range, this function will return -1.
178  */
180 
181 /**
182  * Open a joystick for use.
183  * The index passed as an argument refers to the N'th joystick on the system.
184  * This index is not the value which will identify this joystick in future
185  * joystick events. The joystick's instance id (::SDL_JoystickID) will be used
186  * there instead.
187  *
188  * \return A joystick identifier, or NULL if an error occurred.
189  */
190 extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickOpen(int device_index);
191 
192 /**
193  * Return the SDL_Joystick associated with an instance id.
194  */
195 extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickFromInstanceID(SDL_JoystickID joyid);
196 
197 /**
198  * Return the name for this currently opened joystick.
199  * If no name can be found, this function returns NULL.
200  */
201 extern DECLSPEC const char *SDLCALL SDL_JoystickName(SDL_Joystick * joystick);
202 
203 /**
204  * Get the player index of an opened joystick, or -1 if it's not available
205  *
206  * For XInput controllers this returns the XInput user index.
207  */
208 extern DECLSPEC int SDLCALL SDL_JoystickGetPlayerIndex(SDL_Joystick * joystick);
209 
210 /**
211  * Return the GUID for this opened joystick
212  */
213 extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetGUID(SDL_Joystick * joystick);
214 
215 /**
216  * Get the USB vendor ID of an opened joystick, if available.
217  * If the vendor ID isn't available this function returns 0.
218  */
219 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetVendor(SDL_Joystick * joystick);
220 
221 /**
222  * Get the USB product ID of an opened joystick, if available.
223  * If the product ID isn't available this function returns 0.
224  */
225 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetProduct(SDL_Joystick * joystick);
226 
227 /**
228  * Get the product version of an opened joystick, if available.
229  * If the product version isn't available this function returns 0.
230  */
231 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetProductVersion(SDL_Joystick * joystick);
232 
233 /**
234  * Get the type of an opened joystick.
235  */
236 extern DECLSPEC SDL_JoystickType SDLCALL SDL_JoystickGetType(SDL_Joystick * joystick);
237 
238 /**
239  * Return a string representation for this guid. pszGUID must point to at least 33 bytes
240  * (32 for the string plus a NULL terminator).
241  */
242 extern DECLSPEC void SDLCALL SDL_JoystickGetGUIDString(SDL_JoystickGUID guid, char *pszGUID, int cbGUID);
243 
244 /**
245  * Convert a string into a joystick guid
246  */
248 
249 /**
250  * Returns SDL_TRUE if the joystick has been opened and currently connected, or SDL_FALSE if it has not.
251  */
252 extern DECLSPEC SDL_bool SDLCALL SDL_JoystickGetAttached(SDL_Joystick * joystick);
253 
254 /**
255  * Get the instance ID of an opened joystick or -1 if the joystick is invalid.
256  */
257 extern DECLSPEC SDL_JoystickID SDLCALL SDL_JoystickInstanceID(SDL_Joystick * joystick);
258 
259 /**
260  * Get the number of general axis controls on a joystick.
261  */
262 extern DECLSPEC int SDLCALL SDL_JoystickNumAxes(SDL_Joystick * joystick);
263 
264 /**
265  * Get the number of trackballs on a joystick.
266  *
267  * Joystick trackballs have only relative motion events associated
268  * with them and their state cannot be polled.
269  */
270 extern DECLSPEC int SDLCALL SDL_JoystickNumBalls(SDL_Joystick * joystick);
271 
272 /**
273  * Get the number of POV hats on a joystick.
274  */
275 extern DECLSPEC int SDLCALL SDL_JoystickNumHats(SDL_Joystick * joystick);
276 
277 /**
278  * Get the number of buttons on a joystick.
279  */
280 extern DECLSPEC int SDLCALL SDL_JoystickNumButtons(SDL_Joystick * joystick);
281 
282 /**
283  * Update the current state of the open joysticks.
284  *
285  * This is called automatically by the event loop if any joystick
286  * events are enabled.
287  */
288 extern DECLSPEC void SDLCALL SDL_JoystickUpdate(void);
289 
290 /**
291  * Enable/disable joystick event polling.
292  *
293  * If joystick events are disabled, you must call SDL_JoystickUpdate()
294  * yourself and check the state of the joystick when you want joystick
295  * information.
296  *
297  * The state can be one of ::SDL_QUERY, ::SDL_ENABLE or ::SDL_IGNORE.
298  */
300 
301 #define SDL_JOYSTICK_AXIS_MAX 32767
302 #define SDL_JOYSTICK_AXIS_MIN -32768
303 /**
304  * Get the current state of an axis control on a joystick.
305  *
306  * The state is a value ranging from -32768 to 32767.
307  *
308  * The axis indices start at index 0.
309  */
310 extern DECLSPEC Sint16 SDLCALL SDL_JoystickGetAxis(SDL_Joystick * joystick,
311  int axis);
312 
313 /**
314  * Get the initial state of an axis control on a joystick.
315  *
316  * The state is a value ranging from -32768 to 32767.
317  *
318  * The axis indices start at index 0.
319  *
320  * \return SDL_TRUE if this axis has any initial value, or SDL_FALSE if not.
321  */
322 extern DECLSPEC SDL_bool SDLCALL SDL_JoystickGetAxisInitialState(SDL_Joystick * joystick,
323  int axis, Sint16 *state);
324 
325 /**
326  * \name Hat positions
327  */
328 /* @{ */
329 #define SDL_HAT_CENTERED 0x00
330 #define SDL_HAT_UP 0x01
331 #define SDL_HAT_RIGHT 0x02
332 #define SDL_HAT_DOWN 0x04
333 #define SDL_HAT_LEFT 0x08
334 #define SDL_HAT_RIGHTUP (SDL_HAT_RIGHT|SDL_HAT_UP)
335 #define SDL_HAT_RIGHTDOWN (SDL_HAT_RIGHT|SDL_HAT_DOWN)
336 #define SDL_HAT_LEFTUP (SDL_HAT_LEFT|SDL_HAT_UP)
337 #define SDL_HAT_LEFTDOWN (SDL_HAT_LEFT|SDL_HAT_DOWN)
338 /* @} */
339 
340 /**
341  * Get the current state of a POV hat on a joystick.
342  *
343  * The hat indices start at index 0.
344  *
345  * \return The return value is one of the following positions:
346  * - ::SDL_HAT_CENTERED
347  * - ::SDL_HAT_UP
348  * - ::SDL_HAT_RIGHT
349  * - ::SDL_HAT_DOWN
350  * - ::SDL_HAT_LEFT
351  * - ::SDL_HAT_RIGHTUP
352  * - ::SDL_HAT_RIGHTDOWN
353  * - ::SDL_HAT_LEFTUP
354  * - ::SDL_HAT_LEFTDOWN
355  */
356 extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetHat(SDL_Joystick * joystick,
357  int hat);
358 
359 /**
360  * Get the ball axis change since the last poll.
361  *
362  * \return 0, or -1 if you passed it invalid parameters.
363  *
364  * The ball indices start at index 0.
365  */
366 extern DECLSPEC int SDLCALL SDL_JoystickGetBall(SDL_Joystick * joystick,
367  int ball, int *dx, int *dy);
368 
369 /**
370  * Get the current state of a button on a joystick.
371  *
372  * The button indices start at index 0.
373  */
374 extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetButton(SDL_Joystick * joystick,
375  int button);
376 
377 /**
378  * Trigger a rumble effect
379  * Each call to this function cancels any previous rumble effect, and calling it with 0 intensity stops any rumbling.
380  *
381  * \param joystick The joystick to vibrate
382  * \param low_frequency_rumble The intensity of the low frequency (left) rumble motor, from 0 to 0xFFFF
383  * \param high_frequency_rumble The intensity of the high frequency (right) rumble motor, from 0 to 0xFFFF
384  * \param duration_ms The duration of the rumble effect, in milliseconds
385  *
386  * \return 0, or -1 if rumble isn't supported on this joystick
387  */
388 extern DECLSPEC int SDLCALL SDL_JoystickRumble(SDL_Joystick * joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms);
389 
390 /**
391  * Close a joystick previously opened with SDL_JoystickOpen().
392  */
393 extern DECLSPEC void SDLCALL SDL_JoystickClose(SDL_Joystick * joystick);
394 
395 /**
396  * Return the battery level of this joystick
397  */
399 
400 /* Ends C function definitions when using C++ */
401 #ifdef __cplusplus
402 }
403 #endif
404 #include "close_code.h"
405 
406 #endif /* SDL_joystick_h_ */
407 
408 /* vi: set ts=4 sw=4 expandtab: */
SDL_JoystickGetDeviceGUID
SDL_JoystickGUID SDL_JoystickGetDeviceGUID(int device_index)
Definition: SDL_joystick.c:1489
SDL_JOYSTICK_TYPE_GAMECONTROLLER
Definition: SDL_joystick.h:86
SDL_LockJoysticks
void SDL_LockJoysticks(void)
Definition: SDL_joystick.c:87
SDL_JoystickGetGUIDString
void SDL_JoystickGetGUIDString(SDL_JoystickGUID guid, char *pszGUID, int cbGUID)
Definition: SDL_joystick.c:1629
DECLSPEC
#define DECLSPEC
Definition: SDL_internal.h:48
SDL_JoystickNumBalls
int SDL_JoystickNumBalls(SDL_Joystick *joystick)
Definition: SDL_joystick.c:436
Sint32
int32_t Sint32
Definition: SDL_stdinc.h:197
SDL_JOYSTICK_POWER_MAX
Definition: SDL_joystick.h:105
SDL_JoystickNumHats
int SDL_JoystickNumHats(SDL_Joystick *joystick)
Definition: SDL_joystick.c:424
SDL_JoystickEventState
int SDL_JoystickEventState(int state)
Definition: SDL_joystick.c:1094
SDL_error.h
SDLCALL
#define SDLCALL
Definition: SDL_internal.h:49
SDL_JoystickNumButtons
int SDL_JoystickNumButtons(SDL_Joystick *joystick)
Definition: SDL_joystick.c:448
SDL_JoystickPowerLevel
SDL_JoystickPowerLevel
Definition: SDL_joystick.h:97
SDL_JoystickGetGUID
SDL_JoystickGUID SDL_JoystickGetGUID(SDL_Joystick *joystick)
Definition: SDL_joystick.c:1577
SDL_JOYSTICK_POWER_LOW
Definition: SDL_joystick.h:101
SDL_JoystickGetAxisInitialState
SDL_bool SDL_JoystickGetAxisInitialState(SDL_Joystick *joystick, int axis, Sint16 *state)
Definition: SDL_joystick.c:480
SDL_JOYSTICK_TYPE_GUITAR
Definition: SDL_joystick.h:91
SDL_JoystickGetAxis
Sint16 SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis)
Definition: SDL_joystick.c:460
SDL_JOYSTICK_POWER_EMPTY
Definition: SDL_joystick.h:100
SDL_JoystickGetPlayerIndex
int SDL_JoystickGetPlayerIndex(SDL_Joystick *joystick)
Definition: SDL_joystick.c:622
close_code.h
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1973
SDL_JOYSTICK_TYPE_DANCE_PAD
Definition: SDL_joystick.h:90
SDL_JoystickGetDeviceInstanceID
SDL_JoystickID SDL_JoystickGetDeviceInstanceID(int device_index)
Definition: SDL_joystick.c:1546
begin_code.h
SDL_JoystickGetDeviceProduct
Uint16 SDL_JoystickGetDeviceProduct(int device_index)
Definition: SDL_joystick.c:1514
SDL_JoystickGetDevicePlayerIndex
int SDL_JoystickGetDevicePlayerIndex(int device_index)
Definition: SDL_joystick.c:231
SDL_JOYSTICK_TYPE_DRUM_KIT
Definition: SDL_joystick.h:92
Sint16
int16_t Sint16
Definition: SDL_stdinc.h:185
Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:179
SDL_JOYSTICK_POWER_MEDIUM
Definition: SDL_joystick.h:102
_SDL_Joystick
Definition: SDL_sysjoystick.h:41
SDL_JoystickGetAttached
SDL_bool SDL_JoystickGetAttached(SDL_Joystick *joystick)
Definition: SDL_joystick.c:568
SDL_JOYSTICK_POWER_UNKNOWN
Definition: SDL_joystick.h:99
SDL_JOYSTICK_TYPE_FLIGHT_STICK
Definition: SDL_joystick.h:89
SDL_JOYSTICK_POWER_WIRED
Definition: SDL_joystick.h:104
SDL_JOYSTICK_TYPE_THROTTLE
Definition: SDL_joystick.h:94
SDL_JoystickNameForIndex
const char * SDL_JoystickNameForIndex(int device_index)
Definition: SDL_joystick.c:215
SDL_JoystickGetVendor
Uint16 SDL_JoystickGetVendor(SDL_Joystick *joystick)
Definition: SDL_joystick.c:1587
SDL_JoystickGetDeviceProductVersion
Uint16 SDL_JoystickGetDeviceProductVersion(int device_index)
Definition: SDL_joystick.c:1523
SDL_JoystickGetGUIDFromString
SDL_JoystickGUID SDL_JoystickGetGUIDFromString(const char *pchGUID)
Definition: SDL_joystick.c:1674
SDL_JoystickGetDeviceType
SDL_JoystickType SDL_JoystickGetDeviceType(int device_index)
Definition: SDL_joystick.c:1532
SDL_JoystickGetBall
int SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy)
Definition: SDL_joystick.c:519
axis
SDL_Texture * axis
Definition: testgamecontroller.c:67
SDL_JoystickInstanceID
SDL_JoystickID SDL_JoystickInstanceID(SDL_Joystick *joystick)
Definition: SDL_joystick.c:581
SDL_JoystickGetDeviceVendor
Uint16 SDL_JoystickGetDeviceVendor(int device_index)
Definition: SDL_joystick.c:1505
SDL_JoystickUpdate
void SDL_JoystickUpdate(void)
Definition: SDL_joystick.c:1018
SDL_NumJoysticks
int SDL_NumJoysticks(void)
Definition: SDL_joystick.c:148
SDL_UnlockJoysticks
void SDL_UnlockJoysticks(void)
Definition: SDL_joystick.c:95
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:161
SDL_JoystickGetHat
Uint8 SDL_JoystickGetHat(SDL_Joystick *joystick, int hat)
Definition: SDL_joystick.c:499
SDL_JoystickGetProduct
Uint16 SDL_JoystickGetProduct(SDL_Joystick *joystick)
Definition: SDL_joystick.c:1596
SDL_JoystickGetProductVersion
Uint16 SDL_JoystickGetProductVersion(SDL_Joystick *joystick)
Definition: SDL_joystick.c:1605
SDL_JoystickOpen
SDL_Joystick * SDL_JoystickOpen(int device_index)
Definition: SDL_joystick.c:285
SDL_stdinc.h
SDL_JoystickFromInstanceID
SDL_Joystick * SDL_JoystickFromInstanceID(SDL_JoystickID joyid)
Definition: SDL_joystick.c:594
SDL_JOYSTICK_POWER_FULL
Definition: SDL_joystick.h:103
SDL_JoystickNumAxes
int SDL_JoystickNumAxes(SDL_Joystick *joystick)
Definition: SDL_joystick.c:412
SDL_JOYSTICK_TYPE_ARCADE_PAD
Definition: SDL_joystick.h:93
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:203
SDL_JoystickGetType
SDL_JoystickType SDL_JoystickGetType(SDL_Joystick *joystick)
Definition: SDL_joystick.c:1614
SDL_JoystickName
const char * SDL_JoystickName(SDL_Joystick *joystick)
Definition: SDL_joystick.c:612
SDL_JoystickClose
void SDL_JoystickClose(SDL_Joystick *joystick)
Definition: SDL_joystick.c:643
SDL_JoystickGetButton
Uint8 SDL_JoystickGetButton(SDL_Joystick *joystick, int button)
Definition: SDL_joystick.c:547
SDL_JoystickGUID
Definition: SDL_joystick.h:70
SDL_JOYSTICK_TYPE_WHEEL
Definition: SDL_joystick.h:87
state
struct xkb_state * state
Definition: SDL_waylandsym.h:113
SDL_JOYSTICK_TYPE_UNKNOWN
Definition: SDL_joystick.h:85
button
SDL_Texture * button
Definition: testgamecontroller.c:67
SDL_JoystickRumble
int SDL_JoystickRumble(SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms)
Definition: SDL_joystick.c:631
Uint16
uint16_t Uint16
Definition: SDL_stdinc.h:191
SDL_JoystickCurrentPowerLevel
SDL_JoystickPowerLevel SDL_JoystickCurrentPowerLevel(SDL_Joystick *joystick)
Definition: SDL_joystick.c:1702
SDL_JoystickType
SDL_JoystickType
Definition: SDL_joystick.h:83
SDL_JoystickID
Sint32 SDL_JoystickID
Definition: SDL_joystick.h:81
SDL_JOYSTICK_TYPE_ARCADE_STICK
Definition: SDL_joystick.h:88