devela::_dep::sdl3::sys::hidapi

Function SDL_hid_read

pub unsafe extern "C" fn SDL_hid_read(
    dev: *mut SDL_hid_device,
    data: *mut u8,
    length: usize,
) -> i32
Available on crate feature dep_sdl3 only.
Expand description

Read an Input report from a HID device.

Input reports are returned to the host through the INTERRUPT IN endpoint. The first byte will contain the Report number if the device uses numbered reports.

§Parameters

  • dev: a device handle returned from SDL_hid_open().
  • data: a buffer to put the read data into.
  • length: the number of bytes to read. For devices with multiple reports, make sure to read an extra byte for the report number.

§Return value

Returns the actual number of bytes read and -1 on failure; call SDL_GetError() for more information. If no packet was available to be read and the handle is in non-blocking mode, this function returns 0.

§Availability

This function is available since SDL 3.2.0.