mirror of
https://github.com/freedomofpress/dangerzone.git
synced 2025-04-28 18:02:38 +02:00
59 lines
1.5 KiB
Bash
Executable file
59 lines
1.5 KiB
Bash
Executable file
#!/bin/bash
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die() {
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echo "$1" >&2
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exit 1
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}
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IMG_DEPTH=8
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NUM_PAGES=$(find /dangerzone/page-*.rgb |wc -l)
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echo "Document has $NUM_PAGES pages"
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echo
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# Convert rgb files to png files
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for RGB_FILENAME in $(find /dangerzone/page-*.rgb); do
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FILENAME_BASE=${RGB_FILENAME%.rgb}
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PAGE=$(basename $FILENAME_BASE |cut -d"-" -f2)
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WIDTH_FILENAME=${FILENAME_BASE}.width
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HEIGHT_FILENAME=${FILENAME_BASE}.height
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PNG_FILENAME=/tmp/$(basename $FILENAME_BASE).png
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OCR_FILENAME=/tmp/$(basename $FILENAME_BASE)
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PDF_FILENAME=/tmp/$(basename $FILENAME_BASE).pdf
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echo "Converting page $PAGE from pixels to PNG"
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IMG_WIDTH=$(cat $WIDTH_FILENAME)
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IMG_HEIGHT=$(cat $HEIGHT_FILENAME)
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CONVERT_MSGS=$(convert -size "${IMG_WIDTH}x${IMG_HEIGHT}" -depth ${IMG_DEPTH} rgb:"$RGB_FILENAME" png:"$PNG_FILENAME" 2>&1)
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if [ $? -ne 0 ]; then
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die "Page $PAGE conversion failed: $CONVERT_MSGS"
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fi
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echo "Converting page $PAGE from PNG to searchable PDF"
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CONVERT_MSGS=$(tesseract $PNG_FILENAME $OCR_FILENAME pdf 2>&1)
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if [ $? -ne 0 ]; then
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die "Page $PAGE conversion failed: $CONVERT_MSGS"
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fi
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echo
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done
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echo
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echo "Merging $NUM_PAGES pages into a single PDF"
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# Put PDF filenames into an array
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declare -a args
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for PAGE in $(seq 1 $NUM_PAGES); do
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args+=("/tmp/page-$PAGE.pdf")
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done
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args+=("/safezone/safe-output.pdf")
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# Merge them
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pdfunite "${args[@]}"
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# Compress
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echo "Compressing PDF"
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ps2pdf /safezone/safe-output.pdf /safezone/safe-output-compressed.pdf
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