2 Simple DirectMedia Layer
3 Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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.
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:
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.
23 * \file SDL_joystick.h
25 * Include file for SDL joystick event handling
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.
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.
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.
39 #ifndef SDL_joystick_h_
40 #define SDL_joystick_h_
42 #include "SDL_stdinc.h"
43 #include "SDL_error.h"
45 #include "begin_code.h"
46 /* Set up for C function definitions, even when using C++ */
52 * \file SDL_joystick.h
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.
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
64 * The joystick structure used to identify an SDL joystick
67 typedef struct _SDL_Joystick SDL_Joystick;
69 /* A structure that encodes the stable unique id for a joystick device */
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.
79 * The ID value starts at 0 and increments from there. The value -1 is an invalid ID.
81 typedef Sint32 SDL_JoystickID;
85 SDL_JOYSTICK_TYPE_UNKNOWN,
86 SDL_JOYSTICK_TYPE_GAMECONTROLLER,
87 SDL_JOYSTICK_TYPE_WHEEL,
88 SDL_JOYSTICK_TYPE_ARCADE_STICK,
89 SDL_JOYSTICK_TYPE_FLIGHT_STICK,
90 SDL_JOYSTICK_TYPE_DANCE_PAD,
91 SDL_JOYSTICK_TYPE_GUITAR,
92 SDL_JOYSTICK_TYPE_DRUM_KIT,
93 SDL_JOYSTICK_TYPE_ARCADE_PAD,
94 SDL_JOYSTICK_TYPE_THROTTLE
99 SDL_JOYSTICK_POWER_UNKNOWN = -1,
100 SDL_JOYSTICK_POWER_EMPTY, /* <= 5% */
101 SDL_JOYSTICK_POWER_LOW, /* <= 20% */
102 SDL_JOYSTICK_POWER_MEDIUM, /* <= 70% */
103 SDL_JOYSTICK_POWER_FULL, /* <= 100% */
104 SDL_JOYSTICK_POWER_WIRED,
105 SDL_JOYSTICK_POWER_MAX
106 } SDL_JoystickPowerLevel;
108 /* Set max recognized G-force from accelerometer
109 See src/joystick/uikit/SDL_sysjoystick.m for notes on why this is needed
111 #define SDL_IPHONE_MAX_GFORCE 5.0
114 /* Function prototypes */
117 * Locking for multi-threaded access to the joystick API
119 * If you are using the joystick API or handling events from multiple threads
120 * you should use these locking functions to protect access to the joysticks.
122 * In particular, you are guaranteed that the joystick list won't change, so
123 * the API functions that take a joystick index will be valid, and joystick
124 * and game controller events will not be delivered.
126 extern DECLSPEC void SDLCALL SDL_LockJoysticks(void);
127 extern DECLSPEC void SDLCALL SDL_UnlockJoysticks(void);
130 * Count the number of joysticks attached to the system right now
132 extern DECLSPEC int SDLCALL SDL_NumJoysticks(void);
135 * Get the implementation dependent name of a joystick.
136 * This can be called before any joysticks are opened.
137 * If no name can be found, this function returns NULL.
139 extern DECLSPEC const char *SDLCALL SDL_JoystickNameForIndex(int device_index);
142 * Get the player index of a joystick, or -1 if it's not available
143 * This can be called before any joysticks are opened.
145 extern DECLSPEC int SDLCALL SDL_JoystickGetDevicePlayerIndex(int device_index);
148 * Return the GUID for the joystick at this index
149 * This can be called before any joysticks are opened.
151 extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetDeviceGUID(int device_index);
154 * Get the USB vendor ID of a joystick, if available.
155 * This can be called before any joysticks are opened.
156 * If the vendor ID isn't available this function returns 0.
158 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetDeviceVendor(int device_index);
161 * Get the USB product ID of a joystick, if available.
162 * This can be called before any joysticks are opened.
163 * If the product ID isn't available this function returns 0.
165 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetDeviceProduct(int device_index);
168 * Get the product version of a joystick, if available.
169 * This can be called before any joysticks are opened.
170 * If the product version isn't available this function returns 0.
172 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetDeviceProductVersion(int device_index);
175 * Get the type of a joystick, if available.
176 * This can be called before any joysticks are opened.
178 extern DECLSPEC SDL_JoystickType SDLCALL SDL_JoystickGetDeviceType(int device_index);
181 * Get the instance ID of a joystick.
182 * This can be called before any joysticks are opened.
183 * If the index is out of range, this function will return -1.
185 extern DECLSPEC SDL_JoystickID SDLCALL SDL_JoystickGetDeviceInstanceID(int device_index);
188 * Open a joystick for use.
189 * The index passed as an argument refers to the N'th joystick on the system.
190 * This index is not the value which will identify this joystick in future
191 * joystick events. The joystick's instance id (::SDL_JoystickID) will be used
194 * \return A joystick identifier, or NULL if an error occurred.
196 extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickOpen(int device_index);
199 * Return the SDL_Joystick associated with an instance id.
201 extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickFromInstanceID(SDL_JoystickID instance_id);
204 * Return the SDL_Joystick associated with a player index.
206 extern DECLSPEC SDL_Joystick *SDLCALL SDL_JoystickFromPlayerIndex(int player_index);
209 * Attaches a new virtual joystick.
210 * Returns the joystick's device index, or -1 if an error occurred.
212 extern DECLSPEC int SDLCALL SDL_JoystickAttachVirtual(SDL_JoystickType type,
218 * Detaches a virtual joystick
219 * Returns 0 on success, or -1 if an error occurred.
221 extern DECLSPEC int SDLCALL SDL_JoystickDetachVirtual(int device_index);
224 * Indicates whether or not a virtual-joystick is at a given device index.
226 extern DECLSPEC SDL_bool SDLCALL SDL_JoystickIsVirtual(int device_index);
229 * Set values on an opened, virtual-joystick's controls.
230 * Please note that values set here will not be applied until the next
231 * call to SDL_JoystickUpdate, which can either be called directly,
232 * or can be called indirectly through various other SDL APIS,
233 * including, but not limited to the following: SDL_PollEvent,
234 * SDL_PumpEvents, SDL_WaitEventTimeout, SDL_WaitEvent.
236 * Returns 0 on success, -1 on error.
238 extern DECLSPEC int SDLCALL SDL_JoystickSetVirtualAxis(SDL_Joystick *joystick, int axis, Sint16 value);
239 extern DECLSPEC int SDLCALL SDL_JoystickSetVirtualButton(SDL_Joystick *joystick, int button, Uint8 value);
240 extern DECLSPEC int SDLCALL SDL_JoystickSetVirtualHat(SDL_Joystick *joystick, int hat, Uint8 value);
243 * Return the name for this currently opened joystick.
244 * If no name can be found, this function returns NULL.
246 extern DECLSPEC const char *SDLCALL SDL_JoystickName(SDL_Joystick *joystick);
249 * Get the player index of an opened joystick, or -1 if it's not available
251 * For XInput controllers this returns the XInput user index.
253 extern DECLSPEC int SDLCALL SDL_JoystickGetPlayerIndex(SDL_Joystick *joystick);
256 * Set the player index of an opened joystick
258 extern DECLSPEC void SDLCALL SDL_JoystickSetPlayerIndex(SDL_Joystick *joystick, int player_index);
261 * Return the GUID for this opened joystick
263 extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetGUID(SDL_Joystick *joystick);
266 * Get the USB vendor ID of an opened joystick, if available.
267 * If the vendor ID isn't available this function returns 0.
269 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetVendor(SDL_Joystick *joystick);
272 * Get the USB product ID of an opened joystick, if available.
273 * If the product ID isn't available this function returns 0.
275 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetProduct(SDL_Joystick *joystick);
278 * Get the product version of an opened joystick, if available.
279 * If the product version isn't available this function returns 0.
281 extern DECLSPEC Uint16 SDLCALL SDL_JoystickGetProductVersion(SDL_Joystick *joystick);
284 * Get the serial number of an opened joystick, if available.
286 * Returns the serial number of the joystick, or NULL if it is not available.
288 extern DECLSPEC const char * SDLCALL SDL_JoystickGetSerial(SDL_Joystick *joystick);
291 * Get the type of an opened joystick.
293 extern DECLSPEC SDL_JoystickType SDLCALL SDL_JoystickGetType(SDL_Joystick *joystick);
296 * Return a string representation for this guid. pszGUID must point to at least 33 bytes
297 * (32 for the string plus a NULL terminator).
299 extern DECLSPEC void SDLCALL SDL_JoystickGetGUIDString(SDL_JoystickGUID guid, char *pszGUID, int cbGUID);
302 * Convert a string into a joystick guid
304 extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetGUIDFromString(const char *pchGUID);
307 * Returns SDL_TRUE if the joystick has been opened and currently connected, or SDL_FALSE if it has not.
309 extern DECLSPEC SDL_bool SDLCALL SDL_JoystickGetAttached(SDL_Joystick *joystick);
312 * Get the instance ID of an opened joystick or -1 if the joystick is invalid.
314 extern DECLSPEC SDL_JoystickID SDLCALL SDL_JoystickInstanceID(SDL_Joystick *joystick);
317 * Get the number of general axis controls on a joystick.
319 extern DECLSPEC int SDLCALL SDL_JoystickNumAxes(SDL_Joystick *joystick);
322 * Get the number of trackballs on a joystick.
324 * Joystick trackballs have only relative motion events associated
325 * with them and their state cannot be polled.
327 extern DECLSPEC int SDLCALL SDL_JoystickNumBalls(SDL_Joystick *joystick);
330 * Get the number of POV hats on a joystick.
332 extern DECLSPEC int SDLCALL SDL_JoystickNumHats(SDL_Joystick *joystick);
335 * Get the number of buttons on a joystick.
337 extern DECLSPEC int SDLCALL SDL_JoystickNumButtons(SDL_Joystick *joystick);
340 * Update the current state of the open joysticks.
342 * This is called automatically by the event loop if any joystick
343 * events are enabled.
345 extern DECLSPEC void SDLCALL SDL_JoystickUpdate(void);
348 * Enable/disable joystick event polling.
350 * If joystick events are disabled, you must call SDL_JoystickUpdate()
351 * yourself and check the state of the joystick when you want joystick
354 * The state can be one of ::SDL_QUERY, ::SDL_ENABLE or ::SDL_IGNORE.
356 extern DECLSPEC int SDLCALL SDL_JoystickEventState(int state);
358 #define SDL_JOYSTICK_AXIS_MAX 32767
359 #define SDL_JOYSTICK_AXIS_MIN -32768
361 * Get the current state of an axis control on a joystick.
363 * The state is a value ranging from -32768 to 32767.
365 * The axis indices start at index 0.
367 extern DECLSPEC Sint16 SDLCALL SDL_JoystickGetAxis(SDL_Joystick *joystick,
371 * Get the initial state of an axis control on a joystick.
373 * The state is a value ranging from -32768 to 32767.
375 * The axis indices start at index 0.
377 * \return SDL_TRUE if this axis has any initial value, or SDL_FALSE if not.
379 extern DECLSPEC SDL_bool SDLCALL SDL_JoystickGetAxisInitialState(SDL_Joystick *joystick,
380 int axis, Sint16 *state);
383 * \name Hat positions
386 #define SDL_HAT_CENTERED 0x00
387 #define SDL_HAT_UP 0x01
388 #define SDL_HAT_RIGHT 0x02
389 #define SDL_HAT_DOWN 0x04
390 #define SDL_HAT_LEFT 0x08
391 #define SDL_HAT_RIGHTUP (SDL_HAT_RIGHT|SDL_HAT_UP)
392 #define SDL_HAT_RIGHTDOWN (SDL_HAT_RIGHT|SDL_HAT_DOWN)
393 #define SDL_HAT_LEFTUP (SDL_HAT_LEFT|SDL_HAT_UP)
394 #define SDL_HAT_LEFTDOWN (SDL_HAT_LEFT|SDL_HAT_DOWN)
398 * Get the current state of a POV hat on a joystick.
400 * The hat indices start at index 0.
402 * \return The return value is one of the following positions:
403 * - ::SDL_HAT_CENTERED
408 * - ::SDL_HAT_RIGHTUP
409 * - ::SDL_HAT_RIGHTDOWN
411 * - ::SDL_HAT_LEFTDOWN
413 extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetHat(SDL_Joystick *joystick,
417 * Get the ball axis change since the last poll.
419 * \return 0, or -1 if you passed it invalid parameters.
421 * The ball indices start at index 0.
423 extern DECLSPEC int SDLCALL SDL_JoystickGetBall(SDL_Joystick *joystick,
424 int ball, int *dx, int *dy);
427 * Get the current state of a button on a joystick.
429 * The button indices start at index 0.
431 extern DECLSPEC Uint8 SDLCALL SDL_JoystickGetButton(SDL_Joystick *joystick,
435 * Start a rumble effect
436 * Each call to this function cancels any previous rumble effect, and calling it with 0 intensity stops any rumbling.
438 * \param joystick The joystick to vibrate
439 * \param low_frequency_rumble The intensity of the low frequency (left) rumble motor, from 0 to 0xFFFF
440 * \param high_frequency_rumble The intensity of the high frequency (right) rumble motor, from 0 to 0xFFFF
441 * \param duration_ms The duration of the rumble effect, in milliseconds
443 * \return 0, or -1 if rumble isn't supported on this joystick
445 extern DECLSPEC int SDLCALL SDL_JoystickRumble(SDL_Joystick *joystick, Uint16 low_frequency_rumble, Uint16 high_frequency_rumble, Uint32 duration_ms);
448 * Start a rumble effect in the joystick's triggers
449 * Each call to this function cancels any previous trigger rumble effect, and calling it with 0 intensity stops any rumbling.
451 * \param joystick The joystick to vibrate
452 * \param left_rumble The intensity of the left trigger rumble motor, from 0 to 0xFFFF
453 * \param right_rumble The intensity of the right trigger rumble motor, from 0 to 0xFFFF
454 * \param duration_ms The duration of the rumble effect, in milliseconds
456 * \return 0, or -1 if trigger rumble isn't supported on this joystick
458 extern DECLSPEC int SDLCALL SDL_JoystickRumbleTriggers(SDL_Joystick *joystick, Uint16 left_rumble, Uint16 right_rumble, Uint32 duration_ms);
461 * Return whether a joystick has an LED
463 * \param joystick The joystick to query
465 * \return SDL_TRUE, or SDL_FALSE if this joystick does not have a modifiable LED
467 extern DECLSPEC SDL_bool SDLCALL SDL_JoystickHasLED(SDL_Joystick *joystick);
470 * Update a joystick's LED color.
472 * \param joystick The joystick to update
473 * \param red The intensity of the red LED
474 * \param green The intensity of the green LED
475 * \param blue The intensity of the blue LED
477 * \return 0, or -1 if this joystick does not have a modifiable LED
479 extern DECLSPEC int SDLCALL SDL_JoystickSetLED(SDL_Joystick *joystick, Uint8 red, Uint8 green, Uint8 blue);
482 * Close a joystick previously opened with SDL_JoystickOpen().
484 extern DECLSPEC void SDLCALL SDL_JoystickClose(SDL_Joystick *joystick);
487 * Return the battery level of this joystick
489 extern DECLSPEC SDL_JoystickPowerLevel SDLCALL SDL_JoystickCurrentPowerLevel(SDL_Joystick *joystick);
491 /* Ends C function definitions when using C++ */
495 #include "close_code.h"
497 #endif /* SDL_joystick_h_ */
499 /* vi: set ts=4 sw=4 expandtab: */