Function caca_sys::caca_export_area_to_memory

pub unsafe extern "C" fn caca_export_area_to_memory(
    cv: *const CacaCanvasRaw, 
    x: c_int, 
    y: c_int, 
    w: c_int, 
    h: c_int, 
    fmt: *const c_char, 
    size: *mut size_t
) -> *mut c_void