Method upload_ff_effect

src/raw_stream.rs:682–692

Uploads a force feedback effect to the device.

(&mut self, data: FFEffectData)

    /// Uploads a force feedback effect to the device.
    pub fn upload_ff_effect(&mut self, data: FFEffectData) -> io::Result<FFEffect> {
        let mut effect: sys::ff_effect = data.into();
        effect.id = -1;

        unsafe { sys::eviocsff(self.fd.as_raw_fd(), &effect)? };

        let fd = self.fd.try_clone()?;
        let id = effect.id as u16;

        Ok(FFEffect { fd, id })
    }

    /// Sets the force feedback gain, i.e. how strong the force feedback effects should be for the
    /// device. A gain of 0 means no gain, whereas `u16::MAX` is the maximum gain.