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Adds JPEG to rasterize, cleans up

This commit is contained in:
John Whitington 2024-11-27 16:49:41 +00:00
parent f84eecff53
commit 483a34af28
1 changed files with 19 additions and 21 deletions
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40
cpdfcommand.ml
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@ -3010,14 +3010,16 @@ let specs =
("-replace-struct-tree", Arg.String (fun s -> setop (ReplaceStructTree s) ()), " Replace structure tree from JSON");
("-redact", Arg.Unit (fun () -> setop Redact ()), " Redact entire pages");
("-rasterize", Arg.Unit (fun () -> setop Rasterize ()), " Rasterize pages");
("-rasterize-gray", Arg.Unit (fun () -> args.rast_device <- "pnggray"), " Rasterize in greyscale");
("-rasterize-gray", Arg.Unit (fun () -> args.rast_device <- "pnggray"), " Rasterize in grayscale");
("-rasterize-1bpp", Arg.Unit (fun () -> args.rast_device <- "pngmono"), " Rasterize in monochrome");
("-rasterize-jpeg", Arg.Unit (fun () -> args.rast_device <- "jpeg"), " Rasterize as JPEG");
("-rasterize-jpeg-gray", Arg.Unit (fun () -> args.rast_device <- "jpeggray"), "Rasterize as JPEG in grayscale");
("-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");
("-output-jpeg", Arg.String (fun s -> args.rast_device <- "jpeg"; args.op <- Some (OutputImage s)), " Output pages as JPEGs");
("-output-png", Arg.String (fun s -> args.op <- Some (OutputImage s)), " Output pages as PNGs");
(* These items are undocumented *)
("-debug", Arg.Unit setdebug, "");
("-debug-crypt", Arg.Unit (fun () -> args.debugcrypt <- true), "");
@ -3667,7 +3669,7 @@ let replace_obj pdf objspec obj =
Pdf.replace_chain pdf chain obj
(* Call out to GhostScript to rasterize. Read back in and replace the page contents with the resultant PNG. *)
let rasterize antialias device res annots pdf range =
let rasterize antialias device res annots quality pdf range =
Printf.printf "rasterize antialias=%b device=%s res=%f annots=%b\n" antialias device res annots;
if args.path_to_ghostscript = "" then begin
Pdfe.log "Please supply path to gs with -gs\n";
@ -3687,7 +3689,7 @@ let rasterize antialias device res annots pdf range =
Filename.quote_command args.path_to_ghostscript
((if args.gs_quiet then ["-dQUIET"] else []) @
["-dBATCH"; "-dNOPAUSE"; "-dSAFER"; "-dTextAlphaBits=" ^ antialias; "-dGraphicsAlphaBits=" ^ antialias;
"-sDEVICE=" ^ device; "-dUseCropBox"; "-dShowAnnots=" ^ string_of_bool annots;
"-sDEVICE=" ^ device; "-dUseCropBox"; "-dShowAnnots=" ^ string_of_bool annots; "-dJPEGQ=" ^ string_of_int quality;
"-sOutputFile=" ^ tmpout; "-sPageList=" ^ string_of_int pnum; "-r" ^ string_of_float res; tmppdf])
in
Printf.printf "CALL: %S\n" gscall;
@ -3697,9 +3699,13 @@ let rasterize antialias device res annots pdf range =
end;
let data = Pdfio.bytes_of_string (Pdfutil.contents_of_file tmpout) in
Sys.remove tmpout;
let image, _ = Cpdfimage.obj_of_png_data data in
let image, _ = (if device = "jpeg" || device = "jpeggray" then Cpdfimage.obj_of_jpeg_data else Cpdfimage.obj_of_png_data) data in
let imageobj = Pdf.addobj pdf image in
let w, h = let png = Cpdfpng.read_png (Pdfio.input_of_bytes data) in (png.Cpdfpng.width, png.Cpdfpng.height) in
let w, h =
match device with
| "jpeg" | "jpeggray" -> Cpdfjpeg.jpeg_dimensions data
| _ -> let png = Cpdfpng.read_png (Pdfio.input_of_bytes data) in (png.Cpdfpng.width, png.Cpdfpng.height)
in
let w, h =
match page.Pdfpage.rotate with
| Pdfpage.Rotate90 | Pdfpage.Rotate270 -> h, w
@ -3737,8 +3743,7 @@ let rasterize antialias device res annots pdf range =
Sys.remove tmppdf;
pdf
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
let write_images device res quality boxname annots antialias spec pdf range =
if args.path_to_ghostscript = "" then begin
Pdfe.log "Please supply path to gs with -gs\n";
exit 2
@ -3749,19 +3754,14 @@ let write_images res quality boxname gray mono annots antialias spec pdf range =
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 out = Cpdfbookmarks.name_of_spec Cpdfmetadata.UTF8 [] pdf 0 spec 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 []) @
(if boxname = None then [] else ["-dUse" ^ (implode (tl (explode (unopt boxname))))]) @
["-dBATCH"; "-dNOPAUSE"; "-dSAFER"; "-dTextAlphaBits=" ^ antialias; "-dGraphicsAlphaBits=" ^ antialias;
"-sDEVICE=" ^ device; box; "-dShowAnnots=" ^ string_of_bool annots; "-dJPEGQ=" ^ string_of_int quality;
"-sDEVICE=" ^ device; "-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;
@ -4879,13 +4879,11 @@ let go () =
| Some Rasterize ->
let pdf = get_single_pdf args.op false in
let range = parse_pagespec_allow_empty pdf (get_pagespec ()) in
write_pdf false (rasterize args.rast_antialias args.rast_device args.rast_res args.rast_annots pdf range)
write_pdf false (rasterize args.rast_antialias args.rast_device args.rast_res args.rast_annots args.rast_jpeg_quality pdf range)
| Some (OutputImage spec) ->
let pdf = get_single_pdf args.op false in
let range = parse_pagespec_allow_empty pdf (get_pagespec ()) in
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
write_images args.rast_device args.rast_res args.rast_jpeg_quality args.tobox 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. *)