#!/usr/bin/ksh
#

PSRESIZE=/usr/local/bin/psresize   # Path to psresize

echo "poster_resize v1.0"

# Remove ending ".ps" if $1 is not empty
FILE=
if [ -n "$1" ] 
then 
  FILE=`basename $1 .ps`
fi 
INFILE=${FILE}.ps
OUTFILE=${FILE}.resize.ps
TMPFILE=/tmp/ps-resize.$$.ps

# Test existence of the PS File
if [ ! -r "${INFILE}" ]
then  ### DVI-File not found
  if [ -z "$1" ] 
    then  echo "error: no input file specified"
    else  echo "error: file "${INFILE}" not found"
  fi
  echo "usage: poster_resize_UF <ps-file> [<scale-factor>]"
  exit
fi
echo "Input file: ${INFILE}"

# Is a Scale specified?
if [ -n "$2" ]
then 
  SCALE=$2
  echo "Specified scale-factor is: ${SCALE}"
else
  SCALE=2.828
  echo "No scale-factor specified. Using default value (ie. A3->A0): ${SCALE}"
fi

# Do the job
grep '%%BoundingBox: ' ${FILE}.ps | read -r DUMMY X0 Y0 X1 Y1
echo "Old Bounding Box: ${X0} ${Y0} ${X1} ${Y1}"
dc <<EOF | awk '{printf $0 " "}' | read -r DX0 DY0 X2 Y2 X3 Y3 DX2 DY2
  $X1 $X0 - p
  $Y1 $Y0 - p
  $SCALE $X0 * p
  $SCALE $Y0 * p
  $SCALE $X1 * p
  $SCALE $Y1 * p
  $X1 $X0 - $SCALE * p
  $Y1 $Y0 - $SCALE * p
EOF
echo "New Bounding Box: ${X2} ${Y2} ${X3} ${Y3}"
$PSRESIZE  -W${DX0} -H${DY0} -w${DX2} -h${DY2} ${INFILE} \
  ${TMPFILE}
cat ${TMPFILE} | \
  sed "s+%!PS-Adobe.*+%!PS-Adobe-2.0 EPSF-2.0+1" | \
  sed "s+%%BoundingBox:.*+%%BoundingBox: ${X2} ${Y2} ${X3} ${Y3}+1" \
  > ${OUTFILE}
rm -f ${TMPFILE}
echo "Job done. Created: ${OUTFILE}"