Function caca_sys::caca_render_canvas

pub unsafe extern "C" fn caca_render_canvas(
    cv: *const CacaCanvasRaw, 
    f: *const CacaFontRaw, 
    buf: *mut c_void, 
    w: c_int, 
    h: c_int, 
    pitch: c_int
) -> c_int