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Clean up cpdftexttopdf ready for fontpacks

This commit is contained in:
John Whitington 2023-06-13 14:35:01 +01:00
parent 0cc062b302
commit 2029657153
1 changed files with 9 additions and 16 deletions
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25
cpdftexttopdf.ml
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@ -1,10 +1,5 @@
open Pdfutil open Pdfutil
(* Return set of unicode characters in this text *)
let used_characters t =
let codepoints = Pdftext.codepoints_of_utf8 t in
setify codepoints
let rec of_utf8_with_newlines fontpack fontsize t = let rec of_utf8_with_newlines fontpack fontsize t =
let items = ref [] in let items = ref [] in
let currfont = ref 0 in let currfont = ref 0 in
@ -50,23 +45,21 @@ let rec of_utf8_with_newlines fontpack fontsize t =
let typeset ~papersize ~font ~fontsize text = let typeset ~papersize ~font ~fontsize text =
let pdf = Pdf.empty () in let pdf = Pdf.empty () in
let codepoints = used_characters (Pdfio.string_of_bytes text) in let codepoints = Pdftext.codepoints_of_utf8 (Pdfio.string_of_bytes text) in
let font, fontpack = let fontpack =
match font with match font with
| Cpdfembed.PreMadeFontPack t -> (hd (fst t), t) | Cpdfembed.PreMadeFontPack t -> t
| Cpdfembed.EmbedInfo {fontfile; fontname; encoding} -> | Cpdfembed.EmbedInfo {fontfile; fontname; encoding} ->
let embedded = Cpdfembed.embed_truetype pdf ~fontfile ~fontname ~codepoints ~encoding in Cpdfembed.embed_truetype pdf ~fontfile ~fontname ~codepoints ~encoding
(hd (fst embedded), embedded) | Cpdfembed.ExistingNamedFont ->
| Cpdfembed.ExistingNamedFont -> raise (Pdf.PDFError "Can't use existing named font for text-to-PDF") raise (Pdf.PDFError "Can't use existing named font for text-to-PDF")
in in
let instrs = of_utf8_with_newlines fontpack fontsize (Pdfio.string_of_bytes text) in let instrs = of_utf8_with_newlines fontpack fontsize (Pdfio.string_of_bytes text) in
let margin = let margin =
Pdfunits.points (Pdfpaper.width papersize) (Pdfpaper.unit papersize) /. 15. Pdfunits.points (Pdfpaper.width papersize) (Pdfpaper.unit papersize) /. 15.
in in
let instrs = [Cpdftype.Font (font, fontsize); Cpdftype.BeginDocument] @ instrs in let firstfont = hd (keep (function Cpdftype.Font _ -> true | _ -> false) instrs) in
(*Printf.printf "to_string: %s\n" (Cpdftype.to_string instrs);*) let instrs = [firstfont; Cpdftype.BeginDocument] @ instrs in
let pages = Cpdftype.typeset margin margin margin margin papersize pdf instrs in let pages = Cpdftype.typeset margin margin margin margin papersize pdf instrs in
let pdf, pageroot = Pdfpage.add_pagetree pages pdf in let pdf, pageroot = Pdfpage.add_pagetree pages pdf in
let pdf = Pdfpage.add_root pageroot [] pdf in Pdfpage.add_root pageroot [] pdf
(*Pdfwrite.debug_whole_pdf pdf;*)
pdf