`sig
val write_debug : bool Stdlib.ref
type encryption_method =
PDF40bit
| PDF128bit
| AES128bit of bool
| AES256bit of bool
| AES256bitISO of bool
| AlreadyEncrypted
type encryption = {
encryption_method : Pdfwrite.encryption_method;
owner_password : string;
user_password : string;
permissions : Pdfcrypt.permission list;
}
val pdf_to_output :
?preserve_objstm:bool ->
?generate_objstm:bool ->
?compress_objstm:bool ->
?recrypt:string option ->
Pdfwrite.encryption option -> bool -> Pdf.t -> Pdfio.output -> unit
val pdf_to_channel :
?preserve_objstm:bool ->
?generate_objstm:bool ->
?compress_objstm:bool ->
?recrypt:string option ->
Pdfwrite.encryption option -> bool -> Pdf.t -> Stdlib.out_channel -> unit
val pdf_to_file_options :
?preserve_objstm:bool ->
?generate_objstm:bool ->
?compress_objstm:bool ->
?recrypt:string option ->
Pdfwrite.encryption option -> bool -> Pdf.t -> string -> unit
val pdf_to_file : Pdf.t -> string -> unit
val string_of_pdf : Pdf.pdfobject -> string
val string_of_pdf_including_data : Pdf.pdfobject -> string
val debug_whole_pdf : Pdf.t -> unit
val make_hex_pdf_string : string -> string
end`