Pieds-Nus
938bd641a2
sss: save some space, picture compressor pdfdiff : perform a visual diff on simila pdfs to highlight
39 lines
1.0 KiB
Bash
39 lines
1.0 KiB
Bash
#!/bin/bash
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# pdfdiff : perform a graphical diff on two similar pdf files, and highlight the differences
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# Usage : pdfdiff SOURCE1 SOURCE2 [OUTPUT]
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#
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# Dependencies: mutool (https://mupdf.com) ; ImageMagikc (imagemagick.org)
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tmpdir=$(mktemp -d)
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cp "${1}" "${tmpdir}/a.pdf"
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cp "${2}" "${tmpdir}/b.pdf"
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cd "${tmpdir}"
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n=$(mutool info a.pdf | grep -im1 "Pages: " | cut -d " " -f 2)
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m=$(mutool info b.pdf | grep -im1 "Pages: " | cut -d " " -f 2)
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if test "${n}" != "${m}" ; then
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read -p "Warning: Source PDFs do not have the same number of pages. Continue ? [Y/n]"
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test "${REPLY}" = "n" || test "${REPLY}" = "N" && exit 0
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test "${n}" -gt "${m}" && n="${m}"
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fi
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mutool draw -F png -A 0 -N -o a-%d.png a.pdf
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mutool draw -F png -A 0 -N -o b-%d.png b.pdf
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for i in $(seq 1 "${n}") ; do
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compare "a-${i}.png" "b-${i}.png" -compose src "diff-${i}.png"
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montage "a-${i}.png" "diff-${i}.png" "b-${i}.png" -tile 3x1 -geometry +0+0 "out-${i}.png"
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done
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convert $(ls -v out*.png) out.pdf
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cd -
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mv "${tmpdir}/out.pdf" "${3:-./diff.pdf}"
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rm -rf "${tmpdir}"
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