Function pd_sys::canvas_open

pub unsafe extern "C" fn canvas_open(
    x: *const _glist, 
    name: *const c_char, 
    ext: *const c_char, 
    dirresult: *mut c_char, 
    nameresult: *mut *mut c_char, 
    size: c_uint, 
    bin: c_int
) -> c_int