scan_bcard.sh

#!/bin/sh

find_scanner() {
  echo -n "Scanning for scanners.." >&2
  scanimage -f %d
  echo "OK." >&2
}

test ! "x$1" = "x-h" || {
  echo "Usage: ${0##*/} [<scanner>]" >&2
  exit 1
}

: "${scanner:=$1}"
: "${scanner:=$(find_scanner)}"
: "${dpi:=300}"
: "${mode:=Color}"
: "${preview:=no}"

: "${clip_w:=90}"
: "${clip_h:=54}"

if test -n "$scanner";then
  echo "Using scanner: '$scanner'"
else
  echo "Error: no scanner device found. Try 'scanimage -L' or something." >&2
  exit 1
fi

test -n "$VIEWER" || {
  if test -n "$DISPLAY";then
    VIEWER="xdg-open"
  else
    VIEWER="ls -l"
  fi
}

set -e
while true; do
  echo "Clip size: ${clip_w:-None}${clip_w:+ x ${clip_h}}"
  echo "   q: quit"
  echo "   z: swap clip width / height (switch portrait/landscape)"
  echo " <width>x<height>: set new width and height"
  echo -n "Press Enter to scan or a command from above.. "
  read enter
  case "$enter" in
    *[Xx]*)
      clip_w="${enter%x*}"
      clip_h="${enter#*x}"
      continue
    ;;
    [Zz])
      tmp="$clip_w";clip_w="$clip_h";clip_h="$tmp"
      continue
    ;;
    [qQ]) exit;;
  esac
  outfile="$(date "+%y%m%d %H%M%S") ${clip_w}x${clip_h}.jpg"
  echo "Output: $outfile"
  if (set -x;
    scanimage -d "$scanner" -p ${preview:+--preview=no} ${mode:+--mode "$mode"} ${dpi:+--resolution "$dpi"} --format jpeg ${clip_w:+-x "$clip_w"} ${clip_h:+-y "$clip_h"} >"$outfile"
    ) && test -s "$outfile";then
    $VIEWER "$outfile"
  else
    echo "Failed?"
    rm -f "$outfile"
    break
  fi
done