60 lines
2.0 KiB
OCaml
60 lines
2.0 KiB
OCaml
|
(* Build PDF Presentations *)
|
||
|
|
open Pdfutil
|
||
|
|
|
||
|
|
let change_page_effect t d horizontal inward direction effect_duration page =
|
||
|
|
let checkname = function
|
||
|
|
| "Split" | "Blinds" | "Box" | "Wipe" | "Dissolve" | "Glitter" -> ()
|
||
|
|
| _ -> Cpdferror.error "Unknown presentation type"
|
||
|
|
in
|
||
|
|
let rest = page.Pdfpage.rest in
|
||
|
|
let transdict =
|
||
|
|
match t with
|
||
|
|
| None ->
|
||
|
|
Pdf.Dictionary []
|
||
|
|
| Some name ->
|
||
|
|
checkname name;
|
||
|
|
Pdf.Dictionary [("/S", Pdf.Name ("/" ^ name))]
|
||
|
|
in
|
||
|
|
let transdict = Pdf.add_dict_entry transdict "/D" (Pdf.Real effect_duration) in
|
||
|
|
let transdict =
|
||
|
|
match t with
|
||
|
|
| Some ("Split" | "Blinds") ->
|
||
|
|
Pdf.add_dict_entry
|
||
|
|
transdict "/Dm" (Pdf.Name (if horizontal then "/H" else "/V"))
|
||
|
|
| _ -> transdict
|
||
|
|
in
|
||
|
|
let transdict =
|
||
|
|
match t with
|
||
|
|
| Some ("Split" | "Box") ->
|
||
|
|
Pdf.add_dict_entry
|
||
|
|
transdict "/M" (Pdf.Name (if inward then "/I" else "/O"))
|
||
|
|
| _ -> transdict
|
||
|
|
in
|
||
|
|
let transdict =
|
||
|
|
match t with
|
||
|
|
| Some ("Wipe" | "Glitter") ->
|
||
|
|
Pdf.add_dict_entry transdict "/Di" (Pdf.Integer direction)
|
||
|
|
| _ -> transdict
|
||
|
|
in
|
||
|
|
let rest = Pdf.add_dict_entry rest "/Trans" transdict in
|
||
|
|
let rest =
|
||
|
|
match d with
|
||
|
|
| None -> Pdf.remove_dict_entry rest "/Dur"
|
||
|
|
| Some delay -> Pdf.add_dict_entry rest "/Dur" (Pdf.Real delay)
|
||
|
|
in
|
||
|
|
{page with Pdfpage.rest = rest}
|
||
|
|
|
||
|
|
let presentation range t d h i dir effect_dur pdf =
|
||
|
|
let pages = Pdfpage.pages_of_pagetree pdf in
|
||
|
|
let pages' =
|
||
|
|
map2
|
||
|
|
(fun page num ->
|
||
|
|
if mem num range
|
||
|
|
then change_page_effect t d h i dir effect_dur page
|
||
|
|
else page)
|
||
|
|
pages
|
||
|
|
(indx pages)
|
||
|
|
in
|
||
|
|
Pdfpage.change_pages true pdf pages'
|
||
|
|
|