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Hone in on G4 afag401.pdf example

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John Whitington
2025-04-09 17:09:49 +01:00
parent 462e5b5035
commit bc051db8fb
1 changed files with 3 additions and 2 deletions
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5
cpdfimage.ml
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@@ -883,9 +883,10 @@ let recompress_1bpp_ccittg4_lossless ~pixel_threshold ~length_threshold pdf s di
let restore () = reference := old in
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
if w <> 25 || h <> 6 then (if !debug_image_processing then Printf.printf "Debug skipping...\n%!") else
(*if w * h < pixel_threshold then (if !debug_image_processing then Printf.printf "pixel threshold not met\n%!") else*)
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
(*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