Function ncdirectf_render 

pub unsafe extern "C" fn ncdirectf_render(
    n: *mut ncdirect,
    frame: *mut ncdirectf,
    vopts: *const ncvisual_options,
) -> *mut ncdirectv

Same as ncdirect_render_frame(), except ‘frame’ must already have been loaded. A loaded frame may be rendered in different ways before it is destroyed.