2021-10-18 17:22:38 +02:00
|
|
|
open Pdfutil
|
|
|
|
|
2021-10-18 17:12:10 +02:00
|
|
|
(* Embed missing fonts with Ghostscript. *)
|
|
|
|
let embed_missing_fonts path_to_ghostscript gs_quiet fi fo =
|
|
|
|
if path_to_ghostscript = "" then begin
|
|
|
|
Printf.eprintf "Please supply path to gs with -gs\n%!";
|
|
|
|
exit 2
|
|
|
|
end;
|
|
|
|
let gscall =
|
|
|
|
path_to_ghostscript ^
|
|
|
|
" -dNOPAUSE " ^ (if gs_quiet then "-dQUIET" else "") ^ " -sDEVICE=pdfwrite -sOUTPUTFILE=" ^ Filename.quote fo ^
|
|
|
|
" -dBATCH " ^ Filename.quote fi
|
|
|
|
in
|
|
|
|
match Sys.command gscall with
|
|
|
|
| 0 -> exit 0
|
|
|
|
| _ -> Printf.eprintf "Font embedding failed.\n%!"; exit 2
|
2021-10-18 17:22:38 +02:00
|
|
|
|
|
|
|
(* Copy a font from [frompdf] with name [fontname] on page [fontpage] to [pdf] on all pages in [range] *)
|
|
|
|
let copy_font frompdf fontname fontpage range pdf =
|
|
|
|
match Pdf.renumber_pdfs [frompdf; pdf] with
|
|
|
|
| [] | [_] | _::_::_::_ -> assert false
|
|
|
|
| [frompdf; pdf] ->
|
|
|
|
(* 1. Get fontpage *)
|
|
|
|
let frompdf_pages = Pdfpage.pages_of_pagetree frompdf in
|
|
|
|
let frompdf_page =
|
|
|
|
try select fontpage frompdf_pages with
|
|
|
|
Not_found -> failwith "copy_font: Page not found in input pdf"
|
|
|
|
in
|
|
|
|
(* 2. Extract font *)
|
|
|
|
let fonts =
|
|
|
|
match Pdf.lookup_direct frompdf "/Font" frompdf_page.Pdfpage.resources with
|
|
|
|
| Some f -> f
|
|
|
|
| None -> failwith "copy_font: font not found"
|
|
|
|
in
|
|
|
|
let fromfont =
|
|
|
|
match Pdf.lookup_direct frompdf fontname fonts with
|
|
|
|
| Some f -> f
|
|
|
|
| None -> failwith "copy_font: font not found"
|
|
|
|
in
|
|
|
|
let basefontname =
|
|
|
|
match Pdf.lookup_direct frompdf "/BaseFont" fromfont with
|
|
|
|
| Some (Pdf.Name n) -> n
|
|
|
|
| _ -> "/CopyFontAddedNoName"
|
|
|
|
in
|
|
|
|
(* 3. Get all objects forming font (except main /Font one) *)
|
|
|
|
let objnumbers = Pdf.objects_referenced [] [] frompdf fromfont in
|
|
|
|
(* 4. Copy them to from frompdf to pdf. *)
|
|
|
|
iter (function objnum -> Pdf.addobj_given_num pdf (objnum, Pdf.lookup_obj frompdf objnum)) objnumbers;
|
|
|
|
(* 5. Get pages from pdf *)
|
|
|
|
let pdf_pages = Pdfpage.pages_of_pagetree pdf in
|
|
|
|
(* 6. Add the font to pages in range *)
|
|
|
|
let pages' =
|
|
|
|
map
|
|
|
|
(function (page, pagenum) ->
|
|
|
|
if mem pagenum range then
|
|
|
|
let font =
|
|
|
|
match Pdf.lookup_direct pdf "/Font" page.Pdfpage.resources with
|
|
|
|
| Some f -> f
|
|
|
|
| None -> Pdf.Dictionary []
|
|
|
|
in
|
|
|
|
let font' =
|
|
|
|
match font with
|
|
|
|
| (Pdf.Dictionary _) as d ->
|
|
|
|
Pdf.add_dict_entry d basefontname fromfont
|
|
|
|
| _ -> failwith "copy_font: error"
|
|
|
|
in
|
|
|
|
let resources' =
|
|
|
|
Pdf.add_dict_entry page.Pdfpage.resources "/Font" font'
|
|
|
|
in
|
|
|
|
{page with
|
|
|
|
Pdfpage.resources = resources'}
|
|
|
|
else page)
|
|
|
|
(combine pdf_pages (indx pdf_pages));
|
|
|
|
in
|
|
|
|
(* 7. Put the pages back into the pdf, and return *)
|
|
|
|
let pdf, root = Pdfpage.add_pagetree pages' pdf in
|
|
|
|
Pdfpage.add_root root [] pdf
|
|
|
|
|
|
|
|
(* Missing Fonts *)
|
|
|
|
let is_missing pdf dict =
|
|
|
|
match Pdf.lookup_direct pdf "/FontDescriptor" dict with
|
|
|
|
| None -> true
|
|
|
|
| Some d ->
|
|
|
|
match Pdf.lookup_direct pdf "/FontFile" d with
|
|
|
|
| Some _ -> false
|
|
|
|
| None ->
|
|
|
|
match Pdf.lookup_direct pdf "/FontFile2" d with
|
|
|
|
| Some _ -> false
|
|
|
|
| None ->
|
|
|
|
match Pdf.lookup_direct pdf "/FontFile3" d with
|
|
|
|
| Some _ -> false
|
|
|
|
| None -> true
|
|
|
|
|
|
|
|
let missing_font pdf page (name, dict) =
|
|
|
|
if is_missing pdf dict then
|
|
|
|
let subtype =
|
|
|
|
match Pdf.lookup_direct pdf "/Subtype" dict with
|
|
|
|
| Some (Pdf.Name n) -> n
|
|
|
|
| _ -> ""
|
|
|
|
and basefont =
|
|
|
|
match Pdf.lookup_direct pdf "/BaseFont" dict with
|
|
|
|
| Some (Pdf.Name n) -> n
|
|
|
|
| _ -> ""
|
|
|
|
and encoding =
|
|
|
|
match Pdf.lookup_direct pdf "/Encoding" dict with
|
|
|
|
| Some (Pdf.Name n) -> n
|
|
|
|
| _ -> ""
|
|
|
|
in
|
|
|
|
if Pdftext.standard_font_of_name basefont <> None then () else
|
|
|
|
Printf.printf "%i, %s, %s, %s, %s\n" page name subtype basefont encoding
|
|
|
|
|
|
|
|
let missing_fonts pdf range =
|
|
|
|
Cpdf.iter_pages
|
|
|
|
(fun num page ->
|
|
|
|
match Pdf.lookup_direct pdf "/Font" page.Pdfpage.resources with
|
|
|
|
| Some (Pdf.Dictionary fontdict) ->
|
|
|
|
(* Extract descendant fonts *)
|
|
|
|
let name_dict_pairs =
|
|
|
|
flatten
|
|
|
|
(map
|
|
|
|
(fun (name, dict) ->
|
|
|
|
match Pdf.lookup_direct pdf "/DescendantFonts" dict with
|
|
|
|
| Some (Pdf.Array desc_fonts) -> map (fun d -> name, d) desc_fonts
|
|
|
|
| _ -> [(name, dict)])
|
|
|
|
fontdict)
|
|
|
|
in
|
|
|
|
iter (missing_font pdf num) name_dict_pairs
|
|
|
|
| _ -> ())
|
|
|
|
pdf
|
|
|
|
range
|