Function sdl2_sys::SDL_GetNumTouchFingers

source ·

pub unsafe extern "C" fn SDL_GetNumTouchFingers(
    touchID: SDL_TouchID
) -> c_int

Expand description

Get the number of active fingers for a given touch device.

\param touchID the ID of a touch device \returns the number of active fingers for a given touch device on success or 0 on failure; call SDL_GetError() for more information.

\since This function is available since SDL 2.0.0.

\sa SDL_GetTouchFinger