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First stab at write_images

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John Whitington 2024-11-27 15:41:58 +00:00
parent 991fed743a
commit f84eecff53
1 changed files with 46 additions and 7 deletions
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53
cpdfcommand.ml
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@ -565,7 +565,8 @@ type args =
mutable rast_device : string;
mutable rast_res : float;
mutable rast_annots : bool;
mutable rast_antialias : bool}
mutable rast_antialias : bool;
mutable rast_jpeg_quality : int}
let args =
{op = None;
@ -710,7 +711,8 @@ let args =
rast_device = "png16m";
rast_res = 144.;
rast_annots = false;
rast_antialias = true}
rast_antialias = true;
rast_jpeg_quality = 75}
(* Do not reset original_filename or cpdflin or was_encrypted or
was_decrypted_with_owner or recrypt or producer or creator or path_to_* or
@ -841,7 +843,8 @@ let reset_arguments () =
args.rast_device <- "png16m";
args.rast_res <- 144.;
args.rast_annots <- false;
args.rast_antialias <- true
args.rast_antialias <- true;
args.rast_jpeg_quality <- 75
(* Prefer a) the one given with -cpdflin b) a local cpdflin, c) otherwise assume
installed at a system place *)
@ -3012,6 +3015,7 @@ let specs =
("-rasterize-res", Arg.Float (fun f -> args.rast_res <- f), " Rastierization resolution");
("-rasterize-annots", Arg.Unit (fun () -> args.rast_annots <- true), " Rasterize annotations");
("-rasterize-no-antialias", Arg.Unit (fun () -> args.rast_antialias <- false), " Don't antialias when rasterizing");
("-rasterize-jpeg-quality", Arg.Int (fun i -> args.rast_jpeg_quality <- i), " Set JPEG quality");
("-output-jpeg", Arg.String (fun s -> args.op <- Some (OutputImage ("JPG" ^ s))), " Output pages as JPEGs");
("-output-png", Arg.String (fun s -> args.op <- Some (OutputImage ("PNG" ^ s))), " Output pages as PNGs");
(* These items are undocumented *)
@ -3684,7 +3688,7 @@ let rasterize antialias device res annots pdf range =
((if args.gs_quiet then ["-dQUIET"] else []) @
["-dBATCH"; "-dNOPAUSE"; "-dSAFER"; "-dTextAlphaBits=" ^ antialias; "-dGraphicsAlphaBits=" ^ antialias;
"-sDEVICE=" ^ device; "-dUseCropBox"; "-dShowAnnots=" ^ string_of_bool annots;
"-sOUTPUTFILE=" ^ tmpout; "-sPageList=" ^ string_of_int pnum; "-r" ^ string_of_float res; tmppdf])
"-sOutputFile=" ^ tmpout; "-sPageList=" ^ string_of_int pnum; "-r" ^ string_of_float res; tmppdf])
in
Printf.printf "CALL: %S\n" gscall;
begin match Sys.command gscall with
@ -3733,8 +3737,41 @@ let rasterize antialias device res annots pdf range =
Sys.remove tmppdf;
pdf
let write_images spec pdf range =
()
let write_images res quality boxname gray mono annots antialias spec pdf range =
let box = if boxname = None then "" else "-dUse" ^ (implode (tl (explode (unopt boxname)))) in
if args.path_to_ghostscript = "" then begin
Pdfe.log "Please supply path to gs with -gs\n";
exit 2
end;
let tmppdf = Filename.temp_file "cpdf" ".pdf" in
tempfiles := tmppdf::!tempfiles;
Pdfwrite.pdf_to_file pdf tmppdf;
iter2
(fun page pnum ->
if not (mem pnum range) then () else
let device, out =
match explode spec with
| 'P'::'N'::'G'::t -> (if gray then "pnggray" else if mono then "pngmono" else "png16m"), implode t
| 'J'::'P'::'G'::t -> (if gray then "jpeggray" else "jpeg"), implode t
| _ -> assert false
in
let out = Cpdfbookmarks.name_of_spec Cpdfmetadata.UTF8 [] pdf 0 out pnum "" 0 0 in
let antialias = if antialias then "4" else "1" in
let gscall =
Filename.quote_command args.path_to_ghostscript
((if args.gs_quiet then ["-dQUIET"] else []) @
["-dBATCH"; "-dNOPAUSE"; "-dSAFER"; "-dTextAlphaBits=" ^ antialias; "-dGraphicsAlphaBits=" ^ antialias;
"-sDEVICE=" ^ device; box; "-dShowAnnots=" ^ string_of_bool annots; "-dJPEGQ=" ^ string_of_int quality;
"-sOutputFile=" ^ out; "-sPageList=" ^ string_of_int pnum; "-r" ^ string_of_float res; tmppdf])
in
Printf.printf "CALL: %S\n" gscall;
begin match Sys.command gscall with
| 0 -> ()
| _ -> Pdfe.log "Rasterization failed\n"; exit 2
end)
(Pdfpage.pages_of_pagetree pdf)
(ilist 1 (Pdfpage.endpage pdf));
Sys.remove tmppdf
(* Main function *)
let go () =
@ -4846,7 +4883,9 @@ let go () =
| Some (OutputImage spec) ->
let pdf = get_single_pdf args.op false in
let range = parse_pagespec_allow_empty pdf (get_pagespec ()) in
write_images spec pdf range
write_images
args.rast_res args.rast_jpeg_quality args.tobox (args.rast_device = "pnggray") (args.rast_device = "pngmono")
args.rast_annots args.rast_antialias spec pdf range
(* Advise the user if a combination of command line flags makes little sense,
or error out if it make no sense at all. *)