From d0060d9a5e17f3690cd7a37983b0e468cc9e7338 Mon Sep 17 00:00:00 2001 From: John Whitington Date: Mon, 27 Mar 2023 14:18:03 +0100 Subject: [PATCH] more --- cpdfimpose.ml | 5 +-- cpdfpage.ml | 105 ++++++++++++++++++++++++++++++++++---------------- cpdfpage.mli | 2 + 3 files changed, 75 insertions(+), 37 deletions(-) diff --git a/cpdfimpose.ml b/cpdfimpose.ml index f2491c1..a549f46 100644 --- a/cpdfimpose.ml +++ b/cpdfimpose.ml @@ -128,9 +128,8 @@ let impose_pages fit x y columns rtl btt center margin output_mediabox fast fit_ in (* Change the pattern matrices before combining resources *) let pages, h = - (*let r = map2 (fun p t -> Cpdfutil.change_pattern_matrices_page pdf t p) pages transforms in - (r, List.hd r)*) - pages, List.hd pages + let r = map2 (fun p t -> Cpdfpage.change_pattern_matrices_page pdf t p) pages transforms in + (r, List.hd r) in let resources' = pair_reduce (Pdfpage.combine_pdf_resources pdf) (map (fun p -> p.Pdfpage.resources) pages) in let rest' = pair_reduce (combine_pdf_rests pdf) (map (fun p -> p.Pdfpage.rest) pages) in diff --git a/cpdfpage.ml b/cpdfpage.ml index 51815e4..2a3030e 100644 --- a/cpdfpage.ml +++ b/cpdfpage.ml @@ -1,6 +1,63 @@ open Pdfutil open Cpdferror +(* The content transformed by altering any use of [Op_cm]. But we must also +alter any /Matrix entries in pattern dictionaries *) +let change_pattern_matrices_resources pdf tr resources = + try + begin match Pdf.lookup_direct pdf "/Pattern" resources with + | Some (Pdf.Dictionary patterns) -> + let entries = + map + (fun (name, p) -> + (*Printf.printf "Changing matrices of pattern %s\n" name;*) + let old_pattern = Pdf.direct pdf p in + let new_pattern = + let existing_tr = Pdf.parse_matrix pdf "/Matrix" old_pattern in + let new_tr = Pdftransform.matrix_compose (Pdftransform.matrix_invert tr) existing_tr in + Pdf.add_dict_entry old_pattern "/Matrix" (Pdf.make_matrix new_tr) + in + name, Pdf.Indirect (Pdf.addobj pdf new_pattern)) + patterns + in + Pdf.add_dict_entry resources "/Pattern" (Pdf.Dictionary entries) + | _ -> resources + end + with + Pdftransform.NonInvertable -> + Printf.eprintf "Warning: noninvertible matrix\n%!"; + resources + +let change_pattern_matrices_page pdf tr page = + let page = + {page with Pdfpage.resources = change_pattern_matrices_resources pdf tr page.Pdfpage.resources} + in + match Pdf.lookup_direct pdf "/XObject" page.Pdfpage.resources with + | Some (Pdf.Dictionary elts) -> + iter + (fun (k, v) -> + match v with + | Pdf.Indirect i -> + (* Check if it's a form XObject. If so, rewrite its resources and add back as same number. *) + begin match Pdf.lookup_direct pdf "/Subtype" v with + | Some (Pdf.Name "/Form") -> + (*Printf.printf "Processing form xobject %s for patterns\n" k; *) + let form_xobject = Pdf.lookup_obj pdf i in + begin match Pdf.lookup_direct pdf "/Resources" form_xobject with + | Some resources -> + let form_xobject' = + Pdf.add_dict_entry form_xobject "/Resources" (change_pattern_matrices_resources pdf tr resources) + in + Pdf.addobj_given_num pdf (i, form_xobject') + | _ -> () + end + | _ -> () + end; + | _ -> raise (Pdf.PDFError "change_pattern_matrices_page")) + elts; + page + | _ -> page + (* Output information for each page *) let output_page_info pdf range = let pages = Pdfpage.pages_of_pagetree pdf @@ -83,34 +140,14 @@ let hard_box pdf range boxname mediabox_if_missing fast = pdf range -(* Convert a page to a Form XObject *) -let xobject_of_page ~fast pdf page = - let concatted_streams = - let streams = map (Pdf.direct pdf) page.Pdfpage.content in - iter (Pdfcodec.decode_pdfstream pdf) streams; - let bytess = - map (function Pdf.Stream {contents = (_, Got x)} -> x | _ -> raise (Pdf.PDFError "xobject_of_page")) streams - in - Pdfops.concat_bytess bytess - in - Pdf.Stream - {contents = - (Pdf.Dictionary [("/Type", Pdf.Name "/XObject"); - ("/Subtype", Pdf.Name "/Form"); - ("/Resources", page.Pdfpage.resources); - ("/BBox", page.Pdfpage.mediabox)], - Got concatted_streams)} - let shift_page ?(fast=false) dxdylist pdf pnum page = - let xobj = xobject_of_page ~fast pdf page in - let xobjnum = Pdf.addobj pdf xobj in let dx, dy = List.nth dxdylist (pnum - 1) in let transform_op = Pdfops.Op_cm (Pdftransform.matrix_of_op (Pdftransform.Translate (dx, dy))) in - (*let page = - Cpdfutil.change_pattern_matrices_page pdf (Pdftransform.mktranslate ~-.dx ~-.dy) page - in*) + let page = + change_pattern_matrices_page pdf (Pdftransform.mktranslate ~-.dx ~-.dy) page + in Pdfannot.transform_annotations pdf (Pdftransform.mktranslate dx dy) page.Pdfpage.rest; (Pdfpage.prepend_operators pdf [transform_op] ~fast page, pnum, Pdftransform.mktranslate dx dy) @@ -182,7 +219,7 @@ let scale_page_contents ?(fast=false) scale position pdf pnum page = Pdftransform.Scale ((sx, sy), scale, scale)] in let transform_op = Pdfops.Op_cm transform in - (*let page = Cpdfutil.change_pattern_matrices_page pdf transform page in*) + let page = change_pattern_matrices_page pdf transform page in Pdfannot.transform_annotations pdf transform page.Pdfpage.rest; (Pdfpage.prepend_operators pdf [transform_op] ~fast page, pnum, transform) @@ -279,7 +316,7 @@ let transform_boxes tr pdf page = let transform_contents ?(fast=false) tr pdf page = let transform_op = Pdfops.Op_cm tr in - (*let page = Cpdfutil.change_pattern_matrices_page pdf (Pdftransform.matrix_invert tr) page in*) + let page = change_pattern_matrices_page pdf (Pdftransform.matrix_invert tr) page in Pdfannot.transform_annotations pdf tr page.Pdfpage.rest; Pdfpage.prepend_operators pdf [transform_op] ~fast page @@ -335,12 +372,12 @@ let rotate_page_contents ~fast rotpoint r pdf pnum page = let tr = Pdftransform.matrix_of_op (Pdftransform.Rotate (rotation_point, -.(rad_of_deg r))) - (*in let tr2 = + in let tr2 = Pdftransform.matrix_of_op - (Pdftransform.Rotate (rotation_point, rad_of_deg r))*) + (Pdftransform.Rotate (rotation_point, rad_of_deg r)) in let transform_op = Pdfops.Op_cm tr in - (*let page = Cpdfutil.change_pattern_matrices_page pdf tr2 page in*) + let page = change_pattern_matrices_page pdf tr2 page in Pdfannot.transform_annotations pdf tr page.Pdfpage.rest; (Pdfpage.prepend_operators pdf [transform_op] ~fast page, pnum, tr) @@ -358,8 +395,8 @@ let scale_pdf ?(fast=false) sxsylist pdf range = and matrix = Pdftransform.matrix_of_op (Pdftransform.Scale ((0., 0.), sx, sy)) in let transform_op = Pdfops.Op_cm matrix - (*and page = - Cpdfutil.change_pattern_matrices_page pdf (Pdftransform.matrix_invert matrix) page*) + and page = + change_pattern_matrices_page pdf (Pdftransform.matrix_invert matrix) page in Pdfannot.transform_annotations pdf matrix page.Pdfpage.rest; (Pdfpage.prepend_operators pdf ~fast [transform_op] page, pnum, matrix) @@ -404,7 +441,7 @@ let scale_to_fit_pdf ?(fast=false) position input_scale xylist op pdf range = in Pdfannot.transform_annotations pdf matrix page.Pdfpage.rest; (Pdfpage.prepend_operators pdf [Pdfops.Op_cm matrix] ~fast - ((*Cpdfutil.change_pattern_matrices_page pdf (Pdftransform.matrix_invert matrix)*) page), pnum, matrix) + (change_pattern_matrices_page pdf (Pdftransform.matrix_invert matrix) page), pnum, matrix) in process_pages scale_page_to_fit pdf range @@ -442,7 +479,7 @@ let flip_page ?(fast=false) transform_op pdf pnum page = Pdf.parse_rectangle pdf page.Pdfpage.mediabox in let tr = transform_op minx miny maxx maxy in - (*let page = Cpdfutil.change_pattern_matrices_page pdf tr page in*) + let page = change_pattern_matrices_page pdf tr page in Pdfannot.transform_annotations pdf tr page.Pdfpage.rest; (Pdfpage.prepend_operators pdf [Pdfops.Op_cm tr] ~fast page, pnum, tr) @@ -535,7 +572,7 @@ let do_stamp relative_to_cropbox fast position topline midline scale_to_fit isov in Pdfannot.transform_annotations pdf matrix o.Pdfpage.rest; let r = Pdfpage.prepend_operators pdf [Pdfops.Op_cm matrix] ~fast o in - (*Cpdfutil.change_pattern_matrices_page pdf matrix*) r + change_pattern_matrices_page pdf matrix r else let sw = sxmax -. sxmin and sh = symax -. symin and w = txmax -. txmin and h = tymax -. tymin in @@ -547,7 +584,7 @@ let do_stamp relative_to_cropbox fast position topline midline scale_to_fit isov in Pdfannot.transform_annotations pdf matrix o.Pdfpage.rest; let r = Pdfpage.prepend_operators pdf [Pdfops.Op_cm matrix] ~fast o in - (*Cpdfutil.change_pattern_matrices_page pdf matrix*) r + change_pattern_matrices_page pdf matrix r in {u with Pdfpage.content = diff --git a/cpdfpage.mli b/cpdfpage.mli index e9dfad4..da5a97b 100644 --- a/cpdfpage.mli +++ b/cpdfpage.mli @@ -1,5 +1,7 @@ (** Working with pages *) +val change_pattern_matrices_page : Pdf.t -> Pdftransform.transform_matrix -> Pdfpage.t -> Pdfpage.t + (** Print page info (Mediabox etc) to standard output. *) val output_page_info : Pdf.t -> int list -> unit