diff --git a/cpdf.ml b/cpdf.ml index b4ee64b..4f903f8 100644 --- a/cpdf.ml +++ b/cpdf.ml @@ -2533,13 +2533,31 @@ let stamp relative_to_cropbox position topline midline fast scale_to_fit isover let new_marks = map (change_bookmark changetable) marks in Pdfmarks.add_bookmarks new_marks changed +let add_xobject_to_page xobjname xobjnum page pdf = + let resources' = + let xobjects = + match Pdf.lookup_direct pdf "/XObject" page.Pdfpage.resources with + | Some xobjects -> xobjects + | _ -> Pdf.Dictionary [] + in + let new_xobjects = + Pdf.add_dict_entry xobjects xobjname (Pdf.Indirect xobjnum) + in + Pdf.add_dict_entry page.Pdfpage.resources "/XObject" new_xobjects + in + {page with Pdfpage.resources = resources'} + let add_page_as_xobject pdf range page name = - let xobject_data = bytes_of_string "0 0 m 0 100 l 100 100 l 100 0 l f" in + let xobject_data = + match Pdfops.stream_of_ops (Pdfops.parse_operators pdf page.Pdfpage.resources page.Pdfpage.content) with + Pdf.Stream {contents = (_, Got b)} -> b + | _ -> assert false + in let xobject_dict = ["/Type", Pdf.Name "/XObject"; "/Subtype", Pdf.Name "/Form"; "/BBox", Pdf.Array [Pdf.Real 0.; Pdf.Real 0.; Pdf.Real 1000.; Pdf.Real 1000.]; - "/Resources", Pdf.Dictionary []; + "/Resources", page.Pdfpage.resources; "/Length", Pdf.Integer (bytes_size xobject_data); ] in @@ -2547,7 +2565,18 @@ let add_page_as_xobject pdf range page name = Pdf.Stream {contents = (Pdf.Dictionary xobject_dict, Pdf.Got xobject_data)} in let xobject_objnum = Pdf.addobj pdf xobject in - pdf + (* For each page in range, add the xobject to the list of xobjects in the resources of that page *) + let pages = Pdfpage.pages_of_pagetree pdf in + let new_pages = + List.map2 + (fun page pnum -> + if mem pnum range + then add_xobject_to_page name xobject_objnum page pdf + else page) + pages + (indx pages) + in + Pdfpage.change_pages true pdf new_pages (* n.b the use of change_pages here ensures no inheritable resources in the * stamp, therefore creation of xobject from page is as simple as expected. *) @@ -2587,7 +2616,7 @@ let stamp_as_xobject pdf range over = let changetable = hashtable_of_dictionary (combine marks_refnumbers new_refnumbers) in let new_marks = map (change_bookmark changetable) marks in let pdf = Pdfmarks.add_bookmarks new_marks changed in - let name = "/X0" in + let name = "/" ^ Pdfpage.shortest_unused_prefix pdf ^ "CPDFXObj" in (add_page_as_xobject pdf range over_page name, name) (* Combine pages from two PDFs. For now, assume equal length. *)