SDL
2.0
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Data Structures | |
struct | SDL_JoystickGUID |
Macros | |
#define | SDL_JOYSTICK_AXIS_MAX 32767 |
#define | SDL_JOYSTICK_AXIS_MIN -32768 |
Hat positions | |
#define | SDL_HAT_CENTERED 0x00 |
#define | SDL_HAT_UP 0x01 |
#define | SDL_HAT_RIGHT 0x02 |
#define | SDL_HAT_DOWN 0x04 |
#define | SDL_HAT_LEFT 0x08 |
#define | SDL_HAT_RIGHTUP (SDL_HAT_RIGHT|SDL_HAT_UP) |
#define | SDL_HAT_RIGHTDOWN (SDL_HAT_RIGHT|SDL_HAT_DOWN) |
#define | SDL_HAT_LEFTUP (SDL_HAT_LEFT|SDL_HAT_UP) |
#define | SDL_HAT_LEFTDOWN (SDL_HAT_LEFT|SDL_HAT_DOWN) |
Typedefs | |
typedef Sint32 | SDL_JoystickID |
Include file for SDL joystick event handling
The term "device_index" identifies currently plugged in joystick devices between 0 and SDL_NumJoysticks(), with the exact joystick behind a device_index changing as joysticks are plugged and unplugged.
The term "instance_id" is the current instantiation of a joystick device in the system, if the joystick is removed and then re-inserted then it will get a new instance_id, instance_id's are monotonically increasing identifiers of a joystick plugged in.
The term JoystickGUID is a stable 128-bit identifier for a joystick device that does not change over time, it identifies class of the device (a X360 wired controller for example). This identifier is platform dependent.
In order to use these functions, SDL_Init() must have been called with the SDL_INIT_JOYSTICK flag. This causes SDL to scan the system for joysticks, and load appropriate drivers.
If you would like to receive joystick updates while the application is in the background, you should set the following hint before calling SDL_Init(): SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS
Definition in file SDL_joystick.h.
#define SDL_HAT_CENTERED 0x00 |
Definition at line 316 of file SDL_joystick.h.
Referenced by loop(), SDL_JoystickUpdate(), SDL_PrivateJoystickHat(), SDL_SYS_AccelerometerUpdate(), SDL_SYS_MFIJoystickUpdate(), SDLTest_PrintEvent(), and WatchJoystick().
#define SDL_HAT_DOWN 0x04 |
Definition at line 319 of file SDL_joystick.h.
Referenced by loop(), SDL_SYS_AccelerometerUpdate(), and SDLTest_PrintEvent().
#define SDL_HAT_LEFT 0x08 |
Definition at line 320 of file SDL_joystick.h.
Referenced by loop(), SDL_SYS_AccelerometerUpdate(), and SDLTest_PrintEvent().
#define SDL_HAT_LEFTDOWN (SDL_HAT_LEFT|SDL_HAT_DOWN) |
Definition at line 324 of file SDL_joystick.h.
Referenced by SDLTest_PrintEvent().
#define SDL_HAT_LEFTUP (SDL_HAT_LEFT|SDL_HAT_UP) |
Definition at line 323 of file SDL_joystick.h.
Referenced by SDLTest_PrintEvent().
#define SDL_HAT_RIGHT 0x02 |
Definition at line 318 of file SDL_joystick.h.
Referenced by loop(), SDL_SYS_AccelerometerUpdate(), and SDLTest_PrintEvent().
#define SDL_HAT_RIGHTDOWN (SDL_HAT_RIGHT|SDL_HAT_DOWN) |
Definition at line 322 of file SDL_joystick.h.
Referenced by SDLTest_PrintEvent().
#define SDL_HAT_RIGHTUP (SDL_HAT_RIGHT|SDL_HAT_UP) |
Definition at line 321 of file SDL_joystick.h.
Referenced by SDLTest_PrintEvent().
#define SDL_HAT_UP 0x01 |
Definition at line 317 of file SDL_joystick.h.
Referenced by loop(), SDL_SYS_AccelerometerUpdate(), and SDLTest_PrintEvent().
#define SDL_JOYSTICK_AXIS_MAX 32767 |
Definition at line 288 of file SDL_joystick.h.
Referenced by SDL_PrivateGameControllerParseElement(), SDL_PrivateJoystickAxis(), StandardizeAxisValue(), and WatchJoystick().
#define SDL_JOYSTICK_AXIS_MIN -32768 |
Definition at line 289 of file SDL_joystick.h.
Referenced by SDL_PrivateGameControllerParseElement(), StandardizeAxisValue(), and WatchJoystick().
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 Uint32 return SDL_AudioCVT SDL_AudioFormat Uint8 int SDL_AudioFormat Uint8 int return Uint8 const Uint8 Uint32 int const char return return return return return return return return Uint32 return Uint32 SDL_Event return SDL_Event int return SDL_EventFilter void SDL_EventFilter void SDL_EventFilter void int return const char const char return SDL_JoystickGUID return int return int return SDL_GameController return int return const char return SDL_GameController SDL_GameControllerAxis return const char return SDL_GameController SDL_GameControllerButton return SDL_GameController SDL_RWops return SDL_TouchID SDL_RWops return int return int return return SDL_Joystick return SDL_Haptic SDL_Haptic return SDL_Haptic return SDL_Haptic SDL_HapticEffect return SDL_Haptic int Uint32 return SDL_Haptic int SDL_Haptic int return SDL_Haptic return SDL_Haptic return SDL_Haptic return SDL_Haptic return const char const char return const char SDL_HintCallback void int return SDL_Joystick return SDL_Joystick return const char return SDL_Joystick return SDL_Joystick return SDL_Joystick return int return SDL_Joystick int return SDL_Joystick int return return return SDL_Scancode return SDL_Scancode return SDL_Keycode return return const char return void int SDL_LogPriority SDL_LogOutputFunction void Uint32 const char const char SDL_Window return int int return SDL_Window int int return SDL_Surface int int return SDL_Cursor return int return SDL_mutex return SDL_mutex return Uint32 return SDL_sem return SDL_sem Uint32 return SDL_sem return SDL_cond SDL_cond return SDL_cond SDL_mutex Uint32 return Uint32 int Uint32 Uint32 Uint32 Uint32 return Uint32 return int return SDL_Palette const SDL_Color int int return const SDL_PixelFormat Uint8 Uint8 Uint8 return Uint32 const SDL_PixelFormat Uint8 Uint8 Uint8 float Uint16 int int return const SDL_Rect const SDL_Rect SDL_Rect return const SDL_Point int const SDL_Rect SDL_Rect return return int int Uint32 SDL_Window SDL_Renderer return SDL_Surface return SDL_Renderer SDL_RendererInfo return SDL_Renderer Uint32 int int int return SDL_Texture Uint32 int int int return SDL_Texture Uint8 Uint8 Uint8 return SDL_Texture Uint8 return SDL_Texture SDL_BlendMode return SDL_Texture const SDL_Rect const Uint8 int const Uint8 int const Uint8 int return SDL_Texture SDL_Renderer SDL_Texture return SDL_Renderer int int return SDL_Renderer const SDL_Rect return SDL_Renderer const SDL_Rect return SDL_Renderer float float return SDL_Renderer Uint8 Uint8 Uint8 Uint8 return SDL_Renderer SDL_BlendMode return SDL_Renderer return SDL_Renderer const SDL_Point int return SDL_Renderer const SDL_Point int return SDL_Renderer const SDL_Rect int return SDL_Renderer const SDL_Rect int return SDL_Renderer SDL_Texture const SDL_Rect const SDL_Rect const double const SDL_Point const SDL_RendererFlip return SDL_Renderer SDL_Renderer SDL_Texture return void int return return SDL_RWops return SDL_RWops return SDL_RWops return SDL_RWops return SDL_RWops Uint16 return SDL_RWops Uint32 return SDL_RWops Uint64 return const char unsigned int unsigned int unsigned int unsigned int Uint32 return SDL_Window SDL_Surface SDL_WindowShapeMode return size_t return void size_t return const char return void size_t size_t int(*) a int return int return int size_t return size_t return const wchar_t return const wchar_t size_t return const char size_t return const char size_t return char return char return const char int return int char int return long char int return Sint64 char int return const char return const char char int return const char char int return const char char return const char const char size_t return const char const char size_t return double return double return double return double return double return double return double int return float return const char const char return SDL_iconv_t const char size_t char size_t return Uint32 int int int Uint32 Uint32 Uint32 Uint32 return SDL_Surface SDL_Surface return SDL_RWops int return SDL_Surface int return SDL_Surface Uint32 return SDL_Surface Uint8 Uint8 Uint8 return SDL_Surface Uint8 return SDL_Surface SDL_BlendMode return SDL_Surface SDL_Rect SDL_Surface Uint32 Uint32 return SDL_Surface const SDL_Rect Uint32 return SDL_Surface const SDL_Rect SDL_Surface SDL_Rect return SDL_Surface const SDL_Rect SDL_Surface const SDL_Rect return SDL_Surface SDL_Rect SDL_Surface SDL_Rect return SDL_Thread return SDL_Thread return SDL_Thread int return SDL_TLSID const void void(*) return return Uint32 SDL_TimerID return int return SDL_TouchID int return return return const char return return int return int return int SDL_DisplayMode return int const SDL_DisplayMode SDL_DisplayMode return SDL_Window const SDL_DisplayMode return SDL_Window return const void return Uint32 return SDL_Window const char SDL_Window SDL_Surface SDL_Window const char return SDL_Window int int SDL_Window int int SDL_Window int int SDL_Window int int SDL_Window SDL_Window SDL_Window SDL_Window Uint32 return SDL_Window return SDL_Window SDL_bool SDL_Window float return SDL_Window const Uint16 const Uint16 const Uint16 return SDL_Window const char return SDL_GLattr int return SDL_Window return return SDL_Window int int return SDL_GLContext SDL_RWops int return return void return int int return double return SDL_bool return int int return SDL_AudioDeviceID const void Uint32 return SDL_AudioDeviceID int float float float return SDL_JoystickID |
This is a unique ID for a joystick for the time it is connected to the system, and is never reused for the lifetime of the application. If the joystick is disconnected and reconnected, it will get a new ID.
The ID value starts at 0 and increments from there. The value -1 is an invalid ID.
Definition at line 81 of file SDL_joystick.h.
Enumerator | |
---|---|
SDL_JOYSTICK_POWER_UNKNOWN | |
SDL_JOYSTICK_POWER_EMPTY | |
SDL_JOYSTICK_POWER_LOW | |
SDL_JOYSTICK_POWER_MEDIUM | |
SDL_JOYSTICK_POWER_FULL | |
SDL_JOYSTICK_POWER_WIRED | |
SDL_JOYSTICK_POWER_MAX |
Definition at line 97 of file SDL_joystick.h.
enum SDL_JoystickType |
Definition at line 83 of file SDL_joystick.h.
void SDL_JoystickClose | ( | SDL_Joystick * | joystick | ) |
Close a joystick previously opened with SDL_JoystickOpen().
Definition at line 491 of file SDL_joystick.c.
References NULL, SDL_free, SDL_joysticks, SDL_LockJoysticks(), SDL_SYS_JoystickClose(), SDL_UnlockJoysticks(), and SDL_updating_joystick.
Referenced by SDL_JoystickOpen(), SDL_JoystickQuit(), and SDL_JoystickUpdate().
SDL_JoystickPowerLevel SDL_JoystickCurrentPowerLevel | ( | SDL_Joystick * | joystick | ) |
Return the battery level of this joystick
Definition at line 1268 of file SDL_joystick.c.
References SDL_JOYSTICK_POWER_UNKNOWN, and SDL_PrivateJoystickValid().
int SDL_JoystickEventState | ( | int | state | ) |
Enable/disable joystick event polling.
If joystick events are disabled, you must call SDL_JoystickUpdate() yourself and check the state of the joystick when you want joystick information.
The state can be one of SDL_QUERY, SDL_ENABLE or SDL_IGNORE.
Definition at line 902 of file SDL_joystick.c.
References i, SDL_arraysize, SDL_DISABLE, SDL_ENABLE, SDL_EventState, SDL_JOYAXISMOTION, SDL_JOYBALLMOTION, SDL_JOYBUTTONDOWN, SDL_JOYBUTTONUP, SDL_JOYDEVICEADDED, SDL_JOYDEVICEREMOVED, SDL_JOYHATMOTION, and SDL_QUERY.
SDL_Joystick* SDL_JoystickFromInstanceID | ( | SDL_JoystickID | joyid | ) |
Return the SDL_Joystick associated with an instance id.
Definition at line 459 of file SDL_joystick.c.
References NULL, SDL_joysticks, SDL_LockJoysticks(), and SDL_UnlockJoysticks().
SDL_bool SDL_JoystickGetAttached | ( | SDL_Joystick * | joystick | ) |
Returns SDL_TRUE if the joystick has been opened and currently connected, or SDL_FALSE if it has not.
Definition at line 433 of file SDL_joystick.c.
References SDL_FALSE, SDL_PrivateJoystickValid(), and SDL_SYS_JoystickAttached().
Sint16 SDL_JoystickGetAxis | ( | SDL_Joystick * | joystick, |
int | axis | ||
) |
Get the current state of an axis control on a joystick.
The state is a value ranging from -32768 to 32767.
The axis indices start at index 0.
Definition at line 325 of file SDL_joystick.c.
References axis, SDL_PrivateJoystickValid(), SDL_SetError, and state.
Get the initial state of an axis control on a joystick.
The state is a value ranging from -32768 to 32767.
The axis indices start at index 0.
Definition at line 345 of file SDL_joystick.c.
References axis, SDL_FALSE, SDL_PrivateJoystickValid(), and SDL_SetError.
int SDL_JoystickGetBall | ( | SDL_Joystick * | joystick, |
int | ball, | ||
int * | dx, | ||
int * | dy | ||
) |
Get the ball axis change since the last poll.
The ball indices start at index 0.
Definition at line 384 of file SDL_joystick.c.
References retval, SDL_PrivateJoystickValid(), and SDL_SetError.
Uint8 SDL_JoystickGetButton | ( | SDL_Joystick * | joystick, |
int | button | ||
) |
Get the current state of a button on a joystick.
The button indices start at index 0.
Definition at line 412 of file SDL_joystick.c.
References button, SDL_PrivateJoystickValid(), SDL_SetError, and state.
SDL_JoystickGUID SDL_JoystickGetDeviceGUID | ( | int | device_index | ) |
Return the GUID for the joystick at this index This can be called before any joysticks are opened.
Definition at line 1078 of file SDL_joystick.c.
References SDL_NumJoysticks(), SDL_SetError, SDL_SYS_JoystickGetDeviceGUID(), and SDL_zero.
Referenced by SDL_JoystickGetDeviceProduct(), SDL_JoystickGetDeviceProductVersion(), SDL_JoystickGetDeviceType(), and SDL_JoystickGetDeviceVendor().
SDL_JoystickID SDL_JoystickGetDeviceInstanceID | ( | int | device_index | ) |
Get the instance ID of a joystick. This can be called before any joysticks are opened. If the index is out of range, this function will return -1.
Definition at line 1130 of file SDL_joystick.c.
References SDL_NumJoysticks(), SDL_SetError, and SDL_SYS_GetInstanceIdOfDeviceIndex().
Referenced by SDL_JoystickOpen().
Uint16 SDL_JoystickGetDeviceProduct | ( | int | device_index | ) |
Get the USB product ID of a joystick, if available. This can be called before any joysticks are opened. If the product ID isn't available this function returns 0.
Definition at line 1098 of file SDL_joystick.c.
References NULL, SDL_GetJoystickGUIDInfo(), and SDL_JoystickGetDeviceGUID().
Uint16 SDL_JoystickGetDeviceProductVersion | ( | int | device_index | ) |
Get the product version of a joystick, if available. This can be called before any joysticks are opened. If the product version isn't available this function returns 0.
Definition at line 1107 of file SDL_joystick.c.
References NULL, SDL_GetJoystickGUIDInfo(), and SDL_JoystickGetDeviceGUID().
SDL_JoystickType SDL_JoystickGetDeviceType | ( | int | device_index | ) |
Get the type of a joystick, if available. This can be called before any joysticks are opened.
Definition at line 1116 of file SDL_joystick.c.
References SDL_GetJoystickGUIDType(), SDL_IsGameController, SDL_JOYSTICK_TYPE_GAMECONTROLLER, SDL_JOYSTICK_TYPE_UNKNOWN, and SDL_JoystickGetDeviceGUID().
Uint16 SDL_JoystickGetDeviceVendor | ( | int | device_index | ) |
Get the USB vendor ID of a joystick, if available. This can be called before any joysticks are opened. If the vendor ID isn't available this function returns 0.
Definition at line 1089 of file SDL_joystick.c.
References NULL, SDL_GetJoystickGUIDInfo(), and SDL_JoystickGetDeviceGUID().
SDL_JoystickGUID SDL_JoystickGetGUID | ( | SDL_Joystick * | joystick | ) |
Return the GUID for this opened joystick
Definition at line 1139 of file SDL_joystick.c.
References SDL_PrivateJoystickValid(), SDL_SYS_JoystickGetGUID(), and SDL_zero.
Referenced by SDL_JoystickGetProduct(), SDL_JoystickGetProductVersion(), SDL_JoystickGetType(), and SDL_JoystickGetVendor().
SDL_JoystickGUID SDL_JoystickGetGUIDFromString | ( | const char * | pchGUID | ) |
Convert a string into a joystick guid
Definition at line 1238 of file SDL_joystick.c.
References i, nibble(), SDL_memset, and SDL_strlen.
void SDL_JoystickGetGUIDString | ( | SDL_JoystickGUID | guid, |
char * | pszGUID, | ||
int | cbGUID | ||
) |
Return a string representation for this guid. pszGUID must point to at least 33 bytes (32 for the string plus a NULL terminator).
Definition at line 1191 of file SDL_joystick.c.
References SDL_JoystickGUID::data, i, and NULL.
Uint8 SDL_JoystickGetHat | ( | SDL_Joystick * | joystick, |
int | hat | ||
) |
Get the current state of a POV hat on a joystick.
The hat indices start at index 0.
Definition at line 364 of file SDL_joystick.c.
References SDL_PrivateJoystickValid(), SDL_SetError, and state.
Uint16 SDL_JoystickGetProduct | ( | SDL_Joystick * | joystick | ) |
Get the USB product ID of an opened joystick, if available. If the product ID isn't available this function returns 0.
Definition at line 1158 of file SDL_joystick.c.
References NULL, SDL_GetJoystickGUIDInfo(), and SDL_JoystickGetGUID().
Referenced by SDL_JoystickAxesCenteredAtZero().
Uint16 SDL_JoystickGetProductVersion | ( | SDL_Joystick * | joystick | ) |
Get the product version of an opened joystick, if available. If the product version isn't available this function returns 0.
Definition at line 1167 of file SDL_joystick.c.
References NULL, SDL_GetJoystickGUIDInfo(), and SDL_JoystickGetGUID().
SDL_JoystickType SDL_JoystickGetType | ( | SDL_Joystick * | joystick | ) |
Get the type of an opened joystick.
Definition at line 1176 of file SDL_joystick.c.
References SDL_GetJoystickGUIDType(), SDL_JOYSTICK_TYPE_GAMECONTROLLER, SDL_JOYSTICK_TYPE_UNKNOWN, and SDL_JoystickGetGUID().
Uint16 SDL_JoystickGetVendor | ( | SDL_Joystick * | joystick | ) |
Get the USB vendor ID of an opened joystick, if available. If the vendor ID isn't available this function returns 0.
Definition at line 1149 of file SDL_joystick.c.
References NULL, SDL_GetJoystickGUIDInfo(), and SDL_JoystickGetGUID().
Referenced by SDL_JoystickAxesCenteredAtZero().
SDL_JoystickID SDL_JoystickInstanceID | ( | SDL_Joystick * | joystick | ) |
Get the instance ID of an opened joystick or -1 if the joystick is invalid.
Definition at line 446 of file SDL_joystick.c.
References SDL_PrivateJoystickValid().
const char* SDL_JoystickName | ( | SDL_Joystick * | joystick | ) |
Return the name for this currently opened joystick. If no name can be found, this function returns NULL.
Definition at line 478 of file SDL_joystick.c.
References NULL, and SDL_PrivateJoystickValid().
const char* SDL_JoystickNameForIndex | ( | int | device_index | ) |
Get the implementation dependent name of a joystick. This can be called before any joysticks are opened. If no name can be found, this function returns NULL.
Definition at line 111 of file SDL_joystick.c.
References NULL, SDL_NumJoysticks(), SDL_SetError, and SDL_SYS_JoystickNameForDeviceIndex().
int SDL_JoystickNumAxes | ( | SDL_Joystick * | joystick | ) |
Get the number of general axis controls on a joystick.
Definition at line 277 of file SDL_joystick.c.
References SDL_PrivateJoystickValid().
int SDL_JoystickNumBalls | ( | SDL_Joystick * | joystick | ) |
Get the number of trackballs on a joystick.
Joystick trackballs have only relative motion events associated with them and their state cannot be polled.
Definition at line 301 of file SDL_joystick.c.
References SDL_PrivateJoystickValid().
int SDL_JoystickNumButtons | ( | SDL_Joystick * | joystick | ) |
Get the number of buttons on a joystick.
Definition at line 313 of file SDL_joystick.c.
References SDL_PrivateJoystickValid().
int SDL_JoystickNumHats | ( | SDL_Joystick * | joystick | ) |
Get the number of POV hats on a joystick.
Definition at line 289 of file SDL_joystick.c.
References SDL_PrivateJoystickValid().
SDL_Joystick* SDL_JoystickOpen | ( | int | device_index | ) |
Open a joystick for use. The index passed as an argument refers to the N'th joystick on the system. This index is not the value which will identify this joystick in future joystick events. The joystick's instance id (SDL_JoystickID) will be used there instead.
Definition at line 160 of file SDL_joystick.c.
References i, SDL_GameController::joystick, NULL, SDL_calloc, SDL_free, SDL_IsGameController, SDL_JOYSTICK_POWER_UNKNOWN, SDL_JoystickAxesCenteredAtZero(), SDL_JoystickClose(), SDL_JoystickGetDeviceInstanceID(), SDL_joysticks, SDL_LockJoysticks(), SDL_NumJoysticks(), SDL_OutOfMemory, SDL_SetError, SDL_strdup, SDL_SYS_JoystickNameForDeviceIndex(), SDL_SYS_JoystickOpen(), SDL_SYS_JoystickUpdate(), SDL_TRUE, and SDL_UnlockJoysticks().
Update the current state of the open joysticks.
This is called automatically by the event loop if any joystick events are enabled.
Definition at line 840 of file SDL_joystick.c.
References i, SDL_FALSE, SDL_HAT_CENTERED, SDL_JoystickClose(), SDL_joysticks, SDL_LockJoysticks(), SDL_PrivateJoystickAxis(), SDL_PrivateJoystickButton(), SDL_PrivateJoystickHat(), SDL_SYS_JoystickDetect(), SDL_SYS_JoystickUpdate(), SDL_TRUE, SDL_UnlockJoysticks(), and SDL_updating_joystick.
Locking for multi-threaded access to the joystick API
If you are using the joystick API or handling events from multiple threads you should use these locking functions to protect access to the joysticks.
In particular, you are guaranteed that the joystick list won't change, so the API functions that take a joystick index will be valid, and joystick and game controller events will not be delivered.
Definition at line 43 of file SDL_joystick.c.
References SDL_LockMutex.
Referenced by SDL_JoystickClose(), SDL_JoystickFromInstanceID(), SDL_JoystickOpen(), SDL_JoystickQuit(), and SDL_JoystickUpdate().
int SDL_NumJoysticks | ( | void | ) |
Count the number of joysticks attached to the system right now
Definition at line 102 of file SDL_joystick.c.
References SDL_SYS_NumJoysticks().
Referenced by SDL_JoystickGetDeviceGUID(), SDL_JoystickGetDeviceInstanceID(), SDL_JoystickNameForIndex(), and SDL_JoystickOpen().
Definition at line 51 of file SDL_joystick.c.
References SDL_UnlockMutex, and SDLCALL.
Referenced by SDL_JoystickClose(), SDL_JoystickFromInstanceID(), SDL_JoystickOpen(), SDL_JoystickQuit(), and SDL_JoystickUpdate().