pub unsafe extern "C" fn sixel_decode_raw(
p: *mut c_uchar,
len: c_int,
pixels: *mut *mut c_uchar,
pwidth: *mut c_int,
pheight: *mut c_int,
palette: *mut *mut c_uchar,
ncolors: *mut c_int,
allocator: *mut Allocator,
) -> Status