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#!/bin/sh
usage="Usage: $0 indir
Creates a PDF from image and hocr files in indir, saving it to indir.pdf.
The necessary files are first copied to a temporary directory where
they are renamed and reformatted for the hocr-pdf tool from hocr-tools.
The PDF is then created with hocr-pdf, and the temporary directory is
removed."
test $# -ne 1 && echo "$usage" && exit 1
# All possible training files to check for
TRAININGS="rescribealphav4 rescribealphav5"
# Set image compression and dpi
QUALITY=0
DPI=600
if command -v gm > /dev/null ; then
convert="gm convert"
elif command -v convert > /dev/null ; then
convert="convert"
else
echo "Error: no graphicksmagick or imagemagick found"
exit 1
fi
if ! command -v hocr-pdf > /dev/null ; then
echo "Error: no hocr-pdf tool found"
exit 1
fi
if ! test -d "$1"; then
echo "Error: $1 does not exist"
exit 1
fi
tmpdir=`mktemp -d`
if test $? -ne 0 ; then
echo "Error: Failed to create temporary directory"
exit 1
fi
mkdir -p "$tmpdir" || exit 1
echo "Copying hocrs and converting pngs from $1 to $tmpdir"
find "$1" -maxdepth 1 -type f -name '*.unpapered.png' | while read i; do
b=`basename "$i" .unpapered.png`
hocr=""
for t in $TRAININGS; do
n=`echo "$i" | sed "s/.unpapered.png/_unpapered_$t.hocr/"`
test -f "$n" && hocr="$n"
done
if test -z "$hocr"; then
echo "Warning: no corresponding hocr file found for $i, skipping."
continue
fi
$convert -quality $QUALITY -density ${DPI}x${DPI} "$i" "$tmpdir/$b.jpg" || exit 1
cp "$hocr" "$tmpdir/$b.hocr" || exit 1
done
echo "Creating PDF"
hocr-pdf --savefile "$1.pdf" "$tmpdir" || exit 1
echo "Created a PDF at $1.pdf"
rm -rf "$tmpdir"
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