Read an Input report from a HID device.
int SDL_hid_read(SDL_hid_device *dev, unsigned char *data, size_t length);
|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.|
Returns the actual number of bytes read and -1 on error. If no packet was available to be read and the handle is in non-blocking mode, this function returns 0.
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.
This function is available since SDL 2.0.18.