#!/bin/bash
#
# pdfs2djvu
#

if [ -z `which pdftoppm` -o -z `which cjb2` -o -z `which djvm` ]; then
  echo
  echo "Error: pdftoppm, cjb2 and djvm are needed"
  echo
  exit  1 
fi

shopt -s extglob

OUTFILE="#0.djvu"
DEFMASK="*.pdf"
DPI= 300 

if [ -n "$1" ]; then
  MASK=$ 1 
else
  MASK=$DEFMASK
fi

for PDF in $MASK; do
  if [ ! -e $PDF ]; then
    echo
    echo "Error: current directory must contain files with the mask $MASK"
    echo
    exit  1 
  fi
  echo $PDF
  pdftoppm -gray -r $DPI -aa yes -aaVector yes -x  96  -W  2019  -y  96  -H  2580  $PDF $PDF
  for PGM in $PDF*.pgm; do
    echo $PBM
    cjb2 -dpi $DPI $PGM $PGM.djvu
    rm -f $PGM
  done
done

djvm -c $OUTFILE $MASK*.pgm.djvu