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John Whitington
208
cpdf.ml
208
cpdf.ml
@@ -4649,3 +4649,211 @@ let create_pdf pages pagesize =
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in
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in
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let pdf, pageroot = Pdfpage.add_pagetree (many page pages) (Pdf.empty ()) in
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let pdf, pageroot = Pdfpage.add_pagetree (many page pages) (Pdf.empty ()) in
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Pdfpage.add_root pageroot [] pdf
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Pdfpage.add_root pageroot [] pdf
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(* Remove characters which might not make good filenames. *)
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let remove_unsafe_characters encoding s =
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if encoding = Raw then s else
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let chars =
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lose
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(function x ->
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match x with
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'/' | '?' | '<' | '>' | '\\' | ':' | '*' | '|' | '\"' | '^' | '+' | '=' -> true
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| x when int_of_char x < 32 || (int_of_char x > 126 && encoding <> Stripped) -> true
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| _ -> false)
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(explode s)
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in
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match chars with
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| '.'::more -> implode more
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| chars -> implode chars
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let get_bookmark_name encoding pdf marks splitlevel n _ =
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let refnums = Pdf.page_reference_numbers pdf in
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let fastrefnums = hashtable_of_dictionary (combine refnums (indx refnums)) in
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match keep (function m -> n = Pdfpage.pagenumber_of_target ~fastrefnums pdf m.Pdfmarks.target && m.Pdfmarks.level <= splitlevel) marks with
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| {Pdfmarks.text = title}::_ -> remove_unsafe_characters encoding title
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| _ -> ""
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(* @F means filename without extension *)
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(* @N means sequence number with no padding *)
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(* @S means start page of this section *)
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(* @E means end page of this section *)
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(* @B means bookmark name at start page *)
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let process_others encoding marks pdf splitlevel filename sequence startpage endpage s =
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let rec find_ats p = function
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'@'::r -> find_ats (p + 1) r
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| r -> (p, r)
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in
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let string_of_int_width w i =
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if w < 0 then raise (Pdf.PDFError "width of field too narrow")
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else if w > 8 then raise (Pdf.PDFError "width of field too broad") else
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let formats =
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[|format_of_string "%i";
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format_of_string "%i";
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format_of_string "%02i";
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format_of_string "%03i";
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format_of_string "%04i";
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format_of_string "%05i";
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format_of_string "%06i";
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format_of_string "%07i";
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format_of_string "%08i"|]
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in
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Printf.sprintf formats.(w) i
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in
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let rec procss prev = function
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| [] -> rev prev
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| '@'::'F'::t -> procss (rev (explode filename) @ prev) t
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| '@'::'N'::t ->
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let width, rest = find_ats 0 t in
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procss (rev (explode (string_of_int_width width sequence)) @ prev) rest
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| '@'::'S'::t ->
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let width, rest = find_ats 0 t in
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procss (rev (explode (string_of_int_width width startpage)) @ prev) rest
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| '@'::'E'::t ->
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let width, rest = find_ats 0 t in
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procss (rev (explode (string_of_int_width width endpage)) @ prev) rest
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| '@'::'B'::t -> procss (rev (explode (get_bookmark_name encoding pdf marks splitlevel startpage pdf)) @ prev) t
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| h::t -> procss (h::prev) t
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in
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implode (procss [] (explode s))
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let name_of_spec encoding marks (pdf : Pdf.t) splitlevel spec n filename startpage endpage =
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let fill l n =
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let chars = explode (string_of_int n) in
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if length chars > l
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then implode (drop chars (length chars - l))
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else implode ((many '0' (l - length chars)) @ chars)
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in
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let chars = explode spec in
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let before, including = cleavewhile (neq '%') chars in
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let percents, after = cleavewhile (eq '%') including in
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if percents = []
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then
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process_others encoding marks pdf splitlevel filename n startpage endpage spec
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else
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process_others encoding marks pdf splitlevel filename n startpage endpage
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(implode before ^ fill (length percents) n ^ implode after)
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(* Extract Images. *)
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let pnm_to_channel_24 channel w h s =
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let white () = output_char channel ' '
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and newline () = output_char channel '\n'
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and output_string = Pervasives.output_string channel in
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output_string "P6";
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white ();
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output_string (string_of_int w);
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white ();
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output_string (string_of_int h);
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white ();
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output_string "255";
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newline ();
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let pos = ref 0 in
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for y = 1 to h do
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for x = 1 to w * 3 do
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output_byte channel (bget s !pos);
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incr pos
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done
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done
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let write_stream name stream =
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let fh = open_out_bin name in
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for x = 0 to bytes_size stream - 1 do
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output_byte fh (bget stream x)
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done;
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close_out fh
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let write_image path_to_p2p path_to_im pdf resources name image =
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match Pdfimage.get_image_24bpp pdf resources image with
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| Pdfimage.JPEG (stream, _) -> write_stream (name ^ ".jpg") stream
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| Pdfimage.JPEG2000 (stream, _) -> write_stream (name ^ ".jpx") stream
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| Pdfimage.JBIG2 (stream, _) -> write_stream (name ^ ".jbig2") stream
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| Pdfimage.Raw (w, h, Pdfimage.BPP24, stream) ->
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let pnm = name ^ ".pnm" in
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let png = name ^ ".png" in
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let fh = open_out_bin pnm in
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pnm_to_channel_24 fh w h stream;
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close_out fh;
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begin match path_to_p2p with
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| "" ->
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begin match path_to_im with
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"" -> Printf.eprintf "Neither pnm2png nor imagemagick found. Specify with -p2p or -im\n%!"
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begin match
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Sys.command (Filename.quote_command path_to_im [pnm; png])
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with
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0 -> Sys.remove pnm
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| _ ->
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Printf.eprintf "Call to imagemagick failed: did you specify -p2p correctly?\n%!";
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Sys.remove pnm
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end
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end
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| _ ->
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begin match
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Sys.command (Filename.quote_command path_to_p2p ~stdout:png ["-gamma"; "0.45"; "-quiet"; pnm])
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with
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| 0 -> Sys.remove pnm
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| _ ->
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Printf.eprintf "Call to pnmtopng failed: did you specify -p2p correctly?\n%!";
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Sys.remove pnm
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end
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end
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| _ ->
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Printf.eprintf "Unsupported image type when extracting image %s %!" name
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let written = ref []
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let extract_images_inner path_to_p2p path_to_im encoding serial pdf resources stem pnum images =
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let names = map
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(fun _ ->
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name_of_spec
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encoding [] pdf 0 (stem ^ "-p" ^ string_of_int pnum)
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(let r = !serial in serial := !serial + 1; r) "" 0 0) (indx images)
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in
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iter2 (write_image path_to_p2p path_to_im pdf resources) names images
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let rec extract_images_form_xobject path_to_p2p path_to_im encoding dedup dedup_per_page pdf serial stem pnum form =
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let resources =
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match Pdf.lookup_direct pdf "/Resources" form with
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Some (Pdf.Dictionary d) -> Pdf.Dictionary d
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| _ -> Pdf.Dictionary []
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in
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let images =
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let xobjects =
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match Pdf.lookup_direct pdf "/XObject" resources with
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| Some (Pdf.Dictionary elts) -> map snd elts
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| _ -> []
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in
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(* Remove any already in !written. Add any remaining to !written, if !args.dedup or !args.dedup_page *)
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let images = keep (fun o -> Pdf.lookup_direct pdf "/Subtype" o = Some (Pdf.Name "/Image")) xobjects in
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let already_written, images = List.partition (function Pdf.Indirect n -> mem n !written | _ -> false) images in
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if dedup || dedup_per_page then
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written := (option_map (function Pdf.Indirect n -> Some n | _ -> None) images) @ !written;
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images
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in
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extract_images_inner path_to_p2p path_to_im encoding serial pdf resources stem pnum images
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let extract_images path_to_p2p path_to_im encoding dedup dedup_per_page pdf range stem =
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if dedup || dedup_per_page then written := [];
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let pdf_pages = Pdfpage.pages_of_pagetree pdf in
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let pages =
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option_map
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(function (i, pdf_pages) -> if mem i range then Some pdf_pages else None)
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(combine (indx pdf_pages) pdf_pages)
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in
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let serial = ref 0 in
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iter2
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(fun page pnum ->
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if dedup_per_page then written := [];
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let xobjects =
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match Pdf.lookup_direct pdf "/XObject" page.Pdfpage.resources with
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| Some (Pdf.Dictionary elts) -> map snd elts
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| _ -> []
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in
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let images = keep (fun o -> Pdf.lookup_direct pdf "/Subtype" o = Some (Pdf.Name "/Image")) xobjects in
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let already_written, images = List.partition (function Pdf.Indirect n -> mem n !written | _ -> false) images in
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if dedup || dedup_per_page then
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written := (option_map (function Pdf.Indirect n -> Some n | _ -> None) images) @ !written;
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let forms = keep (fun o -> Pdf.lookup_direct pdf "/Subtype" o = Some (Pdf.Name "/Form")) xobjects in
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extract_images_inner path_to_p2p path_to_im encoding serial pdf page.Pdfpage.resources stem pnum images;
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iter (extract_images_form_xobject path_to_p2p path_to_im encoding dedup dedup_per_page pdf serial stem pnum) forms)
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pages
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(indx pages)
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7
cpdf.mli
7
cpdf.mli
@@ -412,3 +412,10 @@ val bookmarks_open_to_level : int -> Pdf.t -> Pdf.t
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val create_pdf : int -> Pdfpaper.t -> Pdf.t
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val create_pdf : int -> Pdfpaper.t -> Pdf.t
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val name_of_spec : encoding ->
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Pdfmarks.t list ->
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Pdf.t -> int -> string -> int -> string -> int -> int -> string
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val extract_images : string ->
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string ->
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encoding -> bool -> bool -> Pdf.t -> int list -> string -> unit
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216
cpdfcommand.ml
216
cpdfcommand.ml
@@ -3,7 +3,7 @@ let demo = false
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let noncomp = false
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let noncomp = false
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let major_version = 2
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let major_version = 2
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let minor_version = 5
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let minor_version = 5
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let version_date = "(devel, 28th Sept 2021)"
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let version_date = "(devel, 15th Nov 2021)"
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open Pdfutil
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open Pdfutil
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open Pdfio
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open Pdfio
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@@ -2773,89 +2773,6 @@ let write_pdf ?(encryption = None) ?(is_decompress=false) mk_id pdf =
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end;
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end;
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flush stdout (*r For Windows *)
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flush stdout (*r For Windows *)
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(* Remove characters which might not make good filenames. *)
|
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let remove_unsafe_characters s =
|
|
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if args.encoding = Cpdf.Raw then s else
|
|
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let chars =
|
|
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lose
|
|
||||||
(function x ->
|
|
||||||
match x with
|
|
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'/' | '?' | '<' | '>' | '\\' | ':' | '*' | '|' | '\"' | '^' | '+' | '=' -> true
|
|
||||||
| x when int_of_char x < 32 || (int_of_char x > 126 && args.encoding <> Cpdf.Stripped) -> true
|
|
||||||
| _ -> false)
|
|
||||||
(explode s)
|
|
||||||
in
|
|
||||||
match chars with
|
|
||||||
| '.'::more -> implode more
|
|
||||||
| chars -> implode chars
|
|
||||||
|
|
||||||
let get_bookmark_name pdf marks splitlevel n _ =
|
|
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let refnums = Pdf.page_reference_numbers pdf in
|
|
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let fastrefnums = hashtable_of_dictionary (combine refnums (indx refnums)) in
|
|
||||||
match keep (function m -> n = Pdfpage.pagenumber_of_target ~fastrefnums pdf m.Pdfmarks.target && m.Pdfmarks.level <= splitlevel) marks with
|
|
||||||
| {Pdfmarks.text = title}::_ -> remove_unsafe_characters title
|
|
||||||
| _ -> ""
|
|
||||||
|
|
||||||
(* @F means filename without extension *)
|
|
||||||
(* @N means sequence number with no padding *)
|
|
||||||
(* @S means start page of this section *)
|
|
||||||
(* @E means end page of this section *)
|
|
||||||
(* @B means bookmark name at start page *)
|
|
||||||
let process_others marks pdf splitlevel filename sequence startpage endpage s =
|
|
||||||
let rec find_ats p = function
|
|
||||||
'@'::r -> find_ats (p + 1) r
|
|
||||||
| r -> (p, r)
|
|
||||||
in
|
|
||||||
let string_of_int_width w i =
|
|
||||||
if w < 0 then raise (Pdf.PDFError "width of field too narrow")
|
|
||||||
else if w > 8 then raise (Pdf.PDFError "width of field too broad") else
|
|
||||||
let formats =
|
|
||||||
[|format_of_string "%i";
|
|
||||||
format_of_string "%i";
|
|
||||||
format_of_string "%02i";
|
|
||||||
format_of_string "%03i";
|
|
||||||
format_of_string "%04i";
|
|
||||||
format_of_string "%05i";
|
|
||||||
format_of_string "%06i";
|
|
||||||
format_of_string "%07i";
|
|
||||||
format_of_string "%08i"|]
|
|
||||||
in
|
|
||||||
Printf.sprintf formats.(w) i
|
|
||||||
in
|
|
||||||
let rec procss prev = function
|
|
||||||
| [] -> rev prev
|
|
||||||
| '@'::'F'::t -> procss (rev (explode filename) @ prev) t
|
|
||||||
| '@'::'N'::t ->
|
|
||||||
let width, rest = find_ats 0 t in
|
|
||||||
procss (rev (explode (string_of_int_width width sequence)) @ prev) rest
|
|
||||||
| '@'::'S'::t ->
|
|
||||||
let width, rest = find_ats 0 t in
|
|
||||||
procss (rev (explode (string_of_int_width width startpage)) @ prev) rest
|
|
||||||
| '@'::'E'::t ->
|
|
||||||
let width, rest = find_ats 0 t in
|
|
||||||
procss (rev (explode (string_of_int_width width endpage)) @ prev) rest
|
|
||||||
| '@'::'B'::t -> procss (rev (explode (get_bookmark_name pdf marks splitlevel startpage pdf)) @ prev) t
|
|
||||||
| h::t -> procss (h::prev) t
|
|
||||||
in
|
|
||||||
implode (procss [] (explode s))
|
|
||||||
|
|
||||||
let name_of_spec marks (pdf : Pdf.t) splitlevel spec n filename startpage endpage =
|
|
||||||
let fill l n =
|
|
||||||
let chars = explode (string_of_int n) in
|
|
||||||
if length chars > l
|
|
||||||
then implode (drop chars (length chars - l))
|
|
||||||
else implode ((many '0' (l - length chars)) @ chars)
|
|
||||||
in
|
|
||||||
let chars = explode spec in
|
|
||||||
let before, including = cleavewhile (neq '%') chars in
|
|
||||||
let percents, after = cleavewhile (eq '%') including in
|
|
||||||
if percents = []
|
|
||||||
then
|
|
||||||
process_others marks pdf splitlevel filename n startpage endpage spec
|
|
||||||
else
|
|
||||||
process_others marks pdf splitlevel filename n startpage endpage
|
|
||||||
(implode before ^ fill (length percents) n ^ implode after)
|
|
||||||
|
|
||||||
(* Find the stem of a filename *)
|
(* Find the stem of a filename *)
|
||||||
let stem s =
|
let stem s =
|
||||||
implode
|
implode
|
||||||
@@ -2872,8 +2789,8 @@ let fast_write_split_pdfs
|
|||||||
let pdf = Pdfpage.pdf_of_pages main_pdf pagenums in
|
let pdf = Pdfpage.pdf_of_pages main_pdf pagenums in
|
||||||
let startpage, endpage = extremes pagenums in
|
let startpage, endpage = extremes pagenums in
|
||||||
let name =
|
let name =
|
||||||
name_of_spec
|
Cpdf.name_of_spec
|
||||||
marks main_pdf splitlevel spec number
|
args.encoding marks main_pdf splitlevel spec number
|
||||||
(stem original_filename) startpage endpage
|
(stem original_filename) startpage endpage
|
||||||
in
|
in
|
||||||
Pdf.remove_unreferenced pdf;
|
Pdf.remove_unreferenced pdf;
|
||||||
@@ -2916,131 +2833,6 @@ let split_pdf
|
|||||||
enc 0 original_filename squeeze spec pdf
|
enc 0 original_filename squeeze spec pdf
|
||||||
(splitinto chunksize (indx pdf_pages)) pdf_pages
|
(splitinto chunksize (indx pdf_pages)) pdf_pages
|
||||||
|
|
||||||
(* Extract Images. *)
|
|
||||||
let pnm_to_channel_24 channel w h s =
|
|
||||||
let white () = output_char channel ' '
|
|
||||||
and newline () = output_char channel '\n'
|
|
||||||
and output_string = Pervasives.output_string channel in
|
|
||||||
output_string "P6";
|
|
||||||
white ();
|
|
||||||
output_string (string_of_int w);
|
|
||||||
white ();
|
|
||||||
output_string (string_of_int h);
|
|
||||||
white ();
|
|
||||||
output_string "255";
|
|
||||||
newline ();
|
|
||||||
let pos = ref 0 in
|
|
||||||
for y = 1 to h do
|
|
||||||
for x = 1 to w * 3 do
|
|
||||||
output_byte channel (bget s !pos);
|
|
||||||
incr pos
|
|
||||||
done
|
|
||||||
done
|
|
||||||
|
|
||||||
let write_stream name stream =
|
|
||||||
let fh = open_out_bin name in
|
|
||||||
for x = 0 to bytes_size stream - 1 do
|
|
||||||
output_byte fh (bget stream x)
|
|
||||||
done;
|
|
||||||
close_out fh
|
|
||||||
|
|
||||||
let write_image pdf resources name image =
|
|
||||||
match Pdfimage.get_image_24bpp pdf resources image with
|
|
||||||
| Pdfimage.JPEG (stream, _) -> write_stream (name ^ ".jpg") stream
|
|
||||||
| Pdfimage.JPEG2000 (stream, _) -> write_stream (name ^ ".jpx") stream
|
|
||||||
| Pdfimage.JBIG2 (stream, _) -> write_stream (name ^ ".jbig2") stream
|
|
||||||
| Pdfimage.Raw (w, h, Pdfimage.BPP24, stream) ->
|
|
||||||
let pnm = name ^ ".pnm" in
|
|
||||||
let png = name ^ ".png" in
|
|
||||||
let fh = open_out_bin pnm in
|
|
||||||
pnm_to_channel_24 fh w h stream;
|
|
||||||
close_out fh;
|
|
||||||
begin match args.path_to_p2p with
|
|
||||||
| "" ->
|
|
||||||
begin match args.path_to_im with
|
|
||||||
"" -> Printf.eprintf "Neither pnm2png nor imagemagick found. Specify with -p2p or -im\n%!"
|
|
||||||
| _ ->
|
|
||||||
begin match
|
|
||||||
Sys.command (Filename.quote_command args.path_to_im [pnm; png])
|
|
||||||
with
|
|
||||||
0 -> Sys.remove pnm
|
|
||||||
| _ ->
|
|
||||||
Printf.eprintf "Call to imagemagick failed: did you specify -p2p correctly?\n%!";
|
|
||||||
Sys.remove pnm
|
|
||||||
end
|
|
||||||
end
|
|
||||||
| _ ->
|
|
||||||
begin match
|
|
||||||
Sys.command (Filename.quote_command args.path_to_p2p ~stdout:png ["-gamma"; "0.45"; "-quiet"; pnm])
|
|
||||||
with
|
|
||||||
| 0 -> Sys.remove pnm
|
|
||||||
| _ ->
|
|
||||||
Printf.eprintf "Call to pnmtopng failed: did you specify -p2p correctly?\n%!";
|
|
||||||
Sys.remove pnm
|
|
||||||
end
|
|
||||||
end
|
|
||||||
| _ ->
|
|
||||||
Printf.eprintf "Unsupported image type when extracting image %s %!" name
|
|
||||||
|
|
||||||
let written = ref []
|
|
||||||
|
|
||||||
let extract_images_inner serial pdf resources stem pnum images =
|
|
||||||
let names = map
|
|
||||||
(fun _ ->
|
|
||||||
name_of_spec
|
|
||||||
[] pdf 0 (stem ^ "-p" ^ string_of_int pnum)
|
|
||||||
(let r = !serial in serial := !serial + 1; r) "" 0 0) (indx images)
|
|
||||||
in
|
|
||||||
iter2 (write_image pdf resources) names images
|
|
||||||
|
|
||||||
let rec extract_images_form_xobject pdf serial stem pnum form =
|
|
||||||
let resources =
|
|
||||||
match Pdf.lookup_direct pdf "/Resources" form with
|
|
||||||
Some (Pdf.Dictionary d) -> Pdf.Dictionary d
|
|
||||||
| _ -> Pdf.Dictionary []
|
|
||||||
in
|
|
||||||
let images =
|
|
||||||
let xobjects =
|
|
||||||
match Pdf.lookup_direct pdf "/XObject" resources with
|
|
||||||
| Some (Pdf.Dictionary elts) -> map snd elts
|
|
||||||
| _ -> []
|
|
||||||
in
|
|
||||||
(* Remove any already in !written. Add any remaining to !written, if !args.dedup or !args.dedup_page *)
|
|
||||||
let images = keep (fun o -> Pdf.lookup_direct pdf "/Subtype" o = Some (Pdf.Name "/Image")) xobjects in
|
|
||||||
let already_written, images = List.partition (function Pdf.Indirect n -> mem n !written | _ -> false) images in
|
|
||||||
if args.dedup || args.dedup_per_page then
|
|
||||||
written := (option_map (function Pdf.Indirect n -> Some n | _ -> None) images) @ !written;
|
|
||||||
images
|
|
||||||
in
|
|
||||||
extract_images_inner serial pdf resources stem pnum images
|
|
||||||
|
|
||||||
let extract_images pdf range stem =
|
|
||||||
if args.dedup || args.dedup_per_page then written := [];
|
|
||||||
let pdf_pages = Pdfpage.pages_of_pagetree pdf in
|
|
||||||
let pages =
|
|
||||||
option_map
|
|
||||||
(function (i, pdf_pages) -> if mem i range then Some pdf_pages else None)
|
|
||||||
(combine (indx pdf_pages) pdf_pages)
|
|
||||||
in
|
|
||||||
let serial = ref 0 in
|
|
||||||
iter2
|
|
||||||
(fun page pnum ->
|
|
||||||
if args.dedup_per_page then written := [];
|
|
||||||
let xobjects =
|
|
||||||
match Pdf.lookup_direct pdf "/XObject" page.Pdfpage.resources with
|
|
||||||
| Some (Pdf.Dictionary elts) -> map snd elts
|
|
||||||
| _ -> []
|
|
||||||
in
|
|
||||||
let images = keep (fun o -> Pdf.lookup_direct pdf "/Subtype" o = Some (Pdf.Name "/Image")) xobjects in
|
|
||||||
let already_written, images = List.partition (function Pdf.Indirect n -> mem n !written | _ -> false) images in
|
|
||||||
if args.dedup || args.dedup_per_page then
|
|
||||||
written := (option_map (function Pdf.Indirect n -> Some n | _ -> None) images) @ !written;
|
|
||||||
let forms = keep (fun o -> Pdf.lookup_direct pdf "/Subtype" o = Some (Pdf.Name "/Form")) xobjects in
|
|
||||||
extract_images_inner serial pdf page.Pdfpage.resources stem pnum images;
|
|
||||||
iter (extract_images_form_xobject pdf serial stem pnum) forms)
|
|
||||||
pages
|
|
||||||
(indx pages)
|
|
||||||
|
|
||||||
let getencryption pdf =
|
let getencryption pdf =
|
||||||
match Pdfread.what_encryption pdf with
|
match Pdfread.what_encryption pdf with
|
||||||
| None | Some Pdfwrite.AlreadyEncrypted -> "Not encrypted"
|
| None | Some Pdfwrite.AlreadyEncrypted -> "Not encrypted"
|
||||||
@@ -3888,7 +3680,7 @@ let go () =
|
|||||||
in
|
in
|
||||||
let pdf = get_single_pdf args.op true in
|
let pdf = get_single_pdf args.op true in
|
||||||
let range = parse_pagespec_allow_empty pdf (get_pagespec ()) in
|
let range = parse_pagespec_allow_empty pdf (get_pagespec ()) in
|
||||||
extract_images pdf range output_spec
|
Cpdf.extract_images args.path_to_p2p args.path_to_im args.encoding args.dedup args.dedup_per_page pdf range output_spec
|
||||||
| Some (ImageResolution f) ->
|
| Some (ImageResolution f) ->
|
||||||
let pdf = get_single_pdf args.op true in
|
let pdf = get_single_pdf args.op true in
|
||||||
let range = parse_pagespec_allow_empty pdf (get_pagespec ()) in
|
let range = parse_pagespec_allow_empty pdf (get_pagespec ()) in
|
||||||
|
|||||||
Reference in New Issue
Block a user