pub unsafe extern "C" fn pdf_new_filter_processor(
    ctx: *mut fz_context,
    doc: *mut pdf_document,
    chain: *mut pdf_processor,
    old_res: *mut pdf_obj,
    new_res: *mut pdf_obj,
    struct_parents: c_int,
    transform: fz_matrix,
    filter: *mut pdf_filter_options
) -> *mut pdf_processor