56 lines
2.0 KiB
OCaml
56 lines
2.0 KiB
OCaml
open Pdfutil
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let rec of_utf8_with_newlines used charcode_extractor t =
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let items = ref [] in
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let buf = ref [] in
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let codepoints = Pdftext.codepoints_of_utf8 t in
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let charcodes_of_codepoints cs =
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option_map
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(fun u ->
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match charcode_extractor u with
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| Some c -> Hashtbl.replace used c (); Some (char_of_int c)
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| None -> Printf.printf "No glyph for unicode U+%04X in this font\n" u; None)
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cs
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in
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List.iter
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(function
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| 10 (*'\n'*) ->
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let c = rev !buf in
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if c <> [] then items := Cpdftype.Text (charcodes_of_codepoints c)::!items;
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items := Cpdftype.NewLine::!items;
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buf := []
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| 13 (*'\r'*) -> ()
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| x ->
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buf := x::!buf)
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codepoints;
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(* Do last one *)
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let c = rev !buf in
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if c <> [] then items := Text (charcodes_of_codepoints c)::!items;
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rev !items
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(* The optional pdf argument is for providing a pre-embedded font - this will
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be removed when we re-embed subsetted? *)
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let typeset ?embedinfo ~papersize ~font ~fontsize text =
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let charcode_extractor = Pdftext.charcode_extractor_of_font_real font in
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let pdf = match embedinfo with None -> Pdf.empty () | Some (pdf, _, _, _) -> pdf in
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let margin =
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Pdfunits.convert
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72. (Pdfpaper.unit papersize) (Pdfunits.PdfPoint) (Pdfpaper.width papersize) /. 15.
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in
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let used = null_hash () in
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let instrs = of_utf8_with_newlines used charcode_extractor (Pdfio.string_of_bytes text) in
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let codepoints = map fst (list_of_hashtbl used) in
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let font =
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match embedinfo with
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| None -> font
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| Some (pdf, fontfile, fontname, encoding) ->
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snd (hd (Cpdfembed.embed_truetype pdf ~fontfile ~fontname ~codepoints ~encoding))
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in
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let pages =
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Cpdftype.typeset
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margin margin margin margin papersize pdf
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([Cpdftype.Font (font, fontsize); Cpdftype.BeginDocument] @ instrs)
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in
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let pdf, pageroot = Pdfpage.add_pagetree pages pdf in
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Pdfpage.add_root pageroot [] pdf
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