-process-images-info finished
This commit is contained in:
John Whitington
parent
96a9142542
commit
8859f17584
117
cpdfimage.ml
117
cpdfimage.ml
|
|
@ -4,6 +4,9 @@ open Cpdferror
|
|||
|
||||
let debug_image_processing = ref false
|
||||
|
||||
let remove x =
|
||||
try Sys.remove x with _ -> ()
|
||||
|
||||
let pnm_white ch = output_char ch ' '
|
||||
let pnm_newline ch = output_char ch '\n'
|
||||
let pnm_output_string = Stdlib.output_string
|
||||
|
|
@ -97,20 +100,20 @@ let write_image ~raw ?path_to_p2p ?path_to_im pdf resources name image =
|
|||
begin match
|
||||
Sys.command (Filename.quote_command path_to_im [pnm; png])
|
||||
with
|
||||
0 -> Sys.remove pnm
|
||||
0 -> remove pnm
|
||||
| _ ->
|
||||
Pdfe.log "Call to imagemagick failed: did you specify -p2p or -im correctly?\n";
|
||||
Sys.remove pnm
|
||||
remove pnm
|
||||
end
|
||||
end
|
||||
| Some path_to_p2p ->
|
||||
begin match
|
||||
Sys.command (Filename.quote_command path_to_p2p ~stdout:png ["-gamma"; "0.45"; "-quiet"; pnm])
|
||||
with
|
||||
| 0 -> Sys.remove pnm
|
||||
| 0 -> remove pnm
|
||||
| _ ->
|
||||
Pdfe.log "Call to pnmtopng failed: did you specify -p2p correctly?\n";
|
||||
Sys.remove pnm
|
||||
remove pnm
|
||||
end
|
||||
end
|
||||
| _ ->
|
||||
|
|
@ -507,18 +510,28 @@ let jpeg_to_jpeg pdf ~pixel_threshold ~length_threshold ~percentage_threshold ~q
|
|||
let command =
|
||||
(Filename.quote_command path_to_convert [out; "-quality"; string_of_int q ^ "%"; out2])
|
||||
in
|
||||
(*Printf.printf "%S\n" command;*) Sys.command command
|
||||
(*0Printf.printf "%S\n" command;*) Sys.command command
|
||||
in
|
||||
if retcode = 0 then
|
||||
begin
|
||||
let result = open_in_bin out2 in
|
||||
let newsize = in_channel_length result in
|
||||
if newsize < size then
|
||||
if !debug_image_processing then Printf.printf "JPEG to JPEG %i -> %i (%i%%)\n%!" size newsize (int_of_float (float newsize /. float size *. 100.));
|
||||
reference := Pdf.add_dict_entry dict "/Length" (Pdf.Integer newsize), Pdf.Got (Pdfio.bytes_of_input_channel result)
|
||||
begin
|
||||
if !debug_image_processing then Printf.printf "JPEG to JPEG %i -> %i (%i%%)\n%!" size newsize (int_of_float (float newsize /. float size *. 100.));
|
||||
reference := Pdf.add_dict_entry dict "/Length" (Pdf.Integer newsize), Pdf.Got (Pdfio.bytes_of_input_channel result)
|
||||
end
|
||||
else
|
||||
begin
|
||||
if !debug_image_processing then Printf.printf "no size reduction\n%!"
|
||||
end
|
||||
end
|
||||
else
|
||||
begin
|
||||
Printf.printf "external process failed\n%!"
|
||||
end;
|
||||
Sys.remove out;
|
||||
Sys.remove out2
|
||||
remove out;
|
||||
remove out2
|
||||
|
||||
let suitable_num pdf dict =
|
||||
match Pdf.lookup_direct pdf "/ColorSpace" dict with
|
||||
|
|
@ -566,7 +579,7 @@ let lossless_out pdf ~pixel_threshold ~length_threshold extension s dict referen
|
|||
in
|
||||
print_string (Pdfwrite.string_of_pdf dict);
|
||||
print_string (Printf.sprintf "%s (%s) [%s]\n" colspace bpc filter);*)
|
||||
if !debug_image_processing then Printf.printf "not suitable\n%!";
|
||||
if !debug_image_processing then Printf.printf "colourspace not suitable\n%!";
|
||||
None (* an image we cannot or do not handle *)
|
||||
|
||||
let lossless_to_jpeg pdf ~pixel_threshold ~length_threshold ~percentage_threshold ~qlossless ~path_to_convert s dict reference =
|
||||
|
|
@ -601,8 +614,8 @@ let lossless_to_jpeg pdf ~pixel_threshold ~length_threshold ~percentage_threshol
|
|||
end;
|
||||
close_in result
|
||||
end;
|
||||
Sys.remove out;
|
||||
Sys.remove out2
|
||||
remove out;
|
||||
remove out2
|
||||
|
||||
let lossless_resample pdf ~pixel_threshold ~length_threshold ~percentage_threshold~interpolate ~path_to_convert s dict reference =
|
||||
match lossless_out pdf ~pixel_threshold ~length_threshold ".png" s dict reference with None -> () | Some (out, out2, size, components, w, h) ->
|
||||
|
|
@ -636,50 +649,54 @@ let lossless_resample pdf ~pixel_threshold ~length_threshold ~percentage_thresho
|
|||
end;
|
||||
close_in result
|
||||
end;
|
||||
Sys.remove out;
|
||||
Sys.remove out2
|
||||
remove out;
|
||||
remove out2
|
||||
|
||||
let recompress_1bpp_jbig2_lossless ~pixel_threshold ~length_threshold ~path_to_jbig2enc pdf s dict reference =
|
||||
let w = match Pdf.lookup_direct pdf "/Width" dict with Some (Pdf.Integer i) -> i | _ -> error "bad width" in
|
||||
let h = match Pdf.lookup_direct pdf "/Height" dict with Some (Pdf.Integer i) -> i | _ -> error "bad height" in
|
||||
if w * h < pixel_threshold then (if !debug_image_processing then Printf.printf "pixel threshold not met\n%!") else (* (but also, jbig2enc fails on tiny images) *)
|
||||
let size = match Pdf.lookup_direct pdf "/Length" dict with Some (Pdf.Integer i) -> i | _ -> 0 in
|
||||
if size < length_threshold then if !debug_image_processing then Printf.printf "length threshold not met\n%!" else
|
||||
Pdfcodec.decode_pdfstream_until_unknown pdf s;
|
||||
match Pdf.lookup_direct pdf "/Filter" (fst !reference) with Some _ -> if !debug_image_processing then Printf.printf "could not decode - skipping\n%!" | None ->
|
||||
let out = Filename.temp_file "cpdf" "convertin" ^ ".pnm" in
|
||||
let out2 = Filename.temp_file "cpdf" "convertout" ^ ".jbig2" in
|
||||
let fh = open_out_bin out in
|
||||
let data = match s with Pdf.Stream {contents = _, Pdf.Got d} -> d | _ -> assert false in
|
||||
pnm_to_channel_1_inverted fh w h data;
|
||||
close_out fh;
|
||||
let retcode =
|
||||
let command = Filename.quote_command ~stdout:out2 path_to_jbig2enc ["-p"; out] in
|
||||
(*Printf.printf "%S\n" command;*) Sys.command command
|
||||
in
|
||||
if retcode = 0 then
|
||||
begin
|
||||
let result = open_in_bin out2 in
|
||||
let newsize = in_channel_length result in
|
||||
if newsize < size then
|
||||
begin
|
||||
if !debug_image_processing then Printf.printf "1bpp to JBIG2 %i -> %i (%i%%)\n%!" size newsize (int_of_float (float newsize /. float size *. 100.));
|
||||
reference :=
|
||||
(Pdf.remove_dict_entry
|
||||
(Pdf.add_dict_entry
|
||||
(Pdf.add_dict_entry dict "/Length" (Pdf.Integer newsize))
|
||||
"/Filter"
|
||||
(Pdf.Name "/JBIG2Decode")) "/DecodeParms"),
|
||||
Pdf.Got (Pdfio.bytes_of_input_channel result)
|
||||
end
|
||||
else
|
||||
begin
|
||||
if !debug_image_processing then Printf.printf "no size reduction\n%!"
|
||||
end;
|
||||
close_in result
|
||||
end;
|
||||
Sys.remove out;
|
||||
Sys.remove out2
|
||||
if size < length_threshold then (if !debug_image_processing then Printf.printf "length threshold not met\n%!") else
|
||||
begin
|
||||
Pdfcodec.decode_pdfstream_until_unknown pdf s;
|
||||
match Pdf.lookup_direct pdf "/Filter" (fst !reference) with
|
||||
| Some x -> if !debug_image_processing then Printf.printf "could not decode - skipping %s length %i\n%!" (Pdfwrite.string_of_pdf x) size
|
||||
| None ->
|
||||
let out = Filename.temp_file "cpdf" "convertin" ^ ".pnm" in
|
||||
let out2 = Filename.temp_file "cpdf" "convertout" ^ ".jbig2" in
|
||||
let fh = open_out_bin out in
|
||||
let data = match s with Pdf.Stream {contents = _, Pdf.Got d} -> d | _ -> assert false in
|
||||
pnm_to_channel_1_inverted fh w h data;
|
||||
close_out fh;
|
||||
let retcode =
|
||||
let command = Filename.quote_command ~stdout:out2 path_to_jbig2enc ["-p"; out] in
|
||||
(*Printf.printf "%S\n" command;*) Sys.command command
|
||||
in
|
||||
if retcode = 0 then
|
||||
begin
|
||||
let result = open_in_bin out2 in
|
||||
let newsize = in_channel_length result in
|
||||
if newsize < size then
|
||||
begin
|
||||
if !debug_image_processing then Printf.printf "1bpp to JBIG2 %i -> %i (%i%%)\n%!" size newsize (int_of_float (float newsize /. float size *. 100.));
|
||||
reference :=
|
||||
(Pdf.remove_dict_entry
|
||||
(Pdf.add_dict_entry
|
||||
(Pdf.add_dict_entry dict "/Length" (Pdf.Integer newsize))
|
||||
"/Filter"
|
||||
(Pdf.Name "/JBIG2Decode")) "/DecodeParms"),
|
||||
Pdf.Got (Pdfio.bytes_of_input_channel result)
|
||||
end
|
||||
else
|
||||
begin
|
||||
if !debug_image_processing then Printf.printf "no size reduction\n%!"
|
||||
end;
|
||||
close_in result
|
||||
end;
|
||||
remove out;
|
||||
remove out2
|
||||
end
|
||||
|
||||
(* JPEG to JPEG: RGB and CMYK JPEGS *)
|
||||
(* Lossless to JPEG: 8bpp Grey, 8bpp RGB, 8bpp CMYK including separation and ICCBased colourspaces *)
|
||||
|
|
|
|||
Loading…
Reference in New Issue