Safe Haskell	None
Language	GHC2021

SDL3.Sys.Bindgen.Touch.Safe

Synopsis

sDL_GetTouchDevices :: Ptr CInt -> IO (Ptr SDL_TouchID)
sDL_GetTouchDeviceName :: SDL_TouchID -> IO (PtrConst CChar)
sDL_GetTouchDeviceType :: SDL_TouchID -> IO SDL_TouchDeviceType
sDL_GetTouchFingers :: SDL_TouchID -> Ptr CInt -> IO (Ptr (Ptr SDL_Finger))

Documentation

sDL_GetTouchDevices Source #

Arguments

:: Ptr CInt	`count` a pointer filled in with the number of devices returned, may be NULL.
-> IO (Ptr SDL_TouchID)

Get a list of registered touch devices.

On some platforms SDL first sees the touch device if it was actually used. Therefore the returned list might be empty, although devices are available. After using all devices at least once the number will be correct.

Returns: a 0 terminated array of touch device IDs or NULL on failure; call SDL_GetError() for more information. This should be freed with SDL_free() when it is no longer needed.
C declaration: SDL_GetTouchDevices, defined at SDL3/SDL_touch.h 140:43

Since: 3.2.0

sDL_GetTouchDeviceName Source #

Arguments

:: SDL_TouchID	`touchID` the touch device instance ID.
-> IO (PtrConst CChar)

Get the touch device name as reported from the driver.

Returns: touch device name, or NULL on failure; call SDL_GetError() for more information.
C declaration: SDL_GetTouchDeviceName, defined at SDL3/SDL_touch.h 151:42

Since: 3.2.0

sDL_GetTouchDeviceType Source #

Arguments

:: SDL_TouchID	`touchID` the ID of a touch device.
-> IO SDL_TouchDeviceType

Get the type of the given touch device.

Returns: touch device type.
C declaration: SDL_GetTouchDeviceType, defined at SDL3/SDL_touch.h 161:49

Since: 3.2.0

sDL_GetTouchFingers Source #

Arguments

:: SDL_TouchID	`touchID` the ID of a touch device.
-> Ptr CInt	`count` a pointer filled in with the number of fingers returned, can be NULL.
-> IO (Ptr (Ptr SDL_Finger))

Get a list of active fingers for a given touch device.

Returns: a NULL terminated array of SDL_Finger pointers or NULL on failure; call SDL_GetError() for more information. This is a single allocation that should be freed with SDL_free() when it is no longer needed.
C declaration: SDL_GetTouchFingers, defined at SDL3/SDL_touch.h 176:43

Since: 3.2.0