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More sensible combine_pages done

This commit is contained in:
John Whitington 2016-11-25 17:38:19 +00:00
parent a0446f7f1c
commit 060ae4d851
1 changed files with 15 additions and 28 deletions
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37
cpdf.ml
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@ -2384,21 +2384,16 @@ let equalize_pages under over =
else
under, over
let combine_pages (fast : bool) under over scaletofit swap equalize =
let debug_combine_pages = false in (* DEBUG *)
let combine_pages fast under over scaletofit swap equalize =
let debug_combine_pages = false in
let debug_pdf pdf n =
if debug_combine_pages then
begin
Pdf.remove_unreferenced pdf;
Pdfwrite.pdf_to_file pdf n
end
begin Pdf.remove_unreferenced pdf; Pdfwrite.pdf_to_file pdf n end
in
Pdfpage.add_prefix over (Pdfpage.shortest_unused_prefix under);
let marks_under = Pdfmarks.read_bookmarks under in
let marks_over = Pdfmarks.read_bookmarks over in
let marks_under, marks_over = Pdfmarks.read_bookmarks under, Pdfmarks.read_bookmarks over in
let under, over = if equalize then equalize_pages under over else under, over in
let under_length = Pdfpage.endpage under in
let over_length = Pdfpage.endpage over in
let under_length, over_length = Pdfpage.endpage under, Pdfpage.endpage over in
if under_length <> over_length then
raise (Pdf.PDFError "combine_pages: not of equal length")
else
@ -2416,24 +2411,16 @@ let combine_pages (fast : bool) under over scaletofit swap equalize =
map2
(fun o u ->
do_stamp
false fast (BottomLeft 0.) false false scaletofit (not swap)
merged o u over)
false fast (BottomLeft 0.) false false scaletofit (not swap) merged o u over)
over_pages under_pages
in
(* we use new_pages @ new_pages here to preserve the number of pages
* so that Pdfpage.change_pages can do its renumbering properly.
* Otherwise things like outlines are lost. TODO: Fix
* Pdfpage.change_pages properly. For now, we just use
* Pdfpage.pdf_of_pages afterward to chop it. *)
(* See also combine_pages below *)
let changed = Pdfpage.change_pages ~is_combine_pages:true true merged new_pages in
debug_pdf changed "changed.pdf";
let cut =
Pdfpage.pdf_of_pages ~retain_numbering:true changed (ilist 1 (length new_pages))
(* Build the changes. 123456 -> 123123 *)
let changes =
let len = List.length new_pages in
combine (ilist 1 (len * 2)) (let x = ilist 1 len in x @ x)
in
debug_pdf cut "cut.pdf";
(* Now shorten to just new_pages *)
let r = Pdfmarks.add_bookmarks (marks_under @ marks_over) cut in
let changed = Pdfpage.change_pages ~changes true merged new_pages in
let r = Pdfmarks.add_bookmarks (marks_under @ marks_over) changed in
debug_pdf r "final.pdf";
r