Print 4 badges on a long sticker

print-badge_2x2

#!/bin/sh

set -e

PRINTER="/dev/usb/lp0"    # the printer device
FORCE=false

DIRECTION=1   # 1 - human-friendly, 0 - paper-friendly

DOTS_MM=8     # printer dots per mm, 8 == 203 dpi
WIDTH=$(( 100 * $DOTS_MM ))   # sticker width
HEIGHT=$(( 150 * $DOTS_MM ))   # sticker height
X_CENTER=$(( $WIDTH / 2 ))    # position for center alignment

FONT="0"        # built-in vector font, scalable by X and Y
FONT_WIDTH=36   # font width, in points, reduce to make letters narrower
FONT_HEIGHT=36  # font height, in points
FONT_X_MULT=$FONT_WIDTH   # font multiplication, for "0" font is size in points
FONT_Y_MULT=$FONT_HEIGHT  # font multiplication, for "0" font is size in points

GAP_MM=6
LINES_GAP_MM=1  # 0 for 143mm, 1 for 150mm
GAP=$(( $GAP_MM * $DOTS_MM ))
LINE_HEIGHT=$(( ( $FONT_HEIGHT / 3 + $LINES_GAP_MM ) * $DOTS_MM ))


usage() {
  echo "Usage:"
  echo "$0 [-d|--dry-run] [-y|--yes] [-o|--orient 0|1] PERS1LINE1 PERS1LINE2 PERS2LINE1 PERS2LINE2"
  exit 1
}


print_spaces() {    # prints N spaces in a line
  local N=$1
  for i in $( seq 1 $N )
  do
    echo -n ' '
  done
}


print_line_centered() {     # prints text centered in a field with the specified width
  local TEXT="$1"
  local WIDTH="$2"
  local LENGTH=$( echo -n "$TEXT" | wc -m )
  local SPACES=$(( ( $WIDTH - $LENGTH ) / 2 ))
  print_spaces $SPACES
  echo "$TEXT"
}


confirm() {       # prints how the badge may looks like and confirms
  local LINE1="$1"
  local LINE2="$2"
  local LINE3="$3"
  local LINE4="$4"

  echo '================'
  print_line_centered "$LINE1" 16
  print_line_centered "$LINE2" 16
  echo '----------------'
  print_line_centered "$LINE1" 16
  print_line_centered "$LINE2" 16
  echo '----------------'
  print_line_centered "$LINE3" 16
  print_line_centered "$LINE4" 16
  echo '----------------'
  print_line_centered "$LINE3" 16
  print_line_centered "$LINE4" 16
  echo '================'

  read -p "Print? [Y/n] " -r REPLY
  echo
  case "$REPLY" in
    [Yy] | "") return 0 ;;
    *) return 1 ;;
  esac
}


print() {         # sends commands to print two lines to the printer
  local LINE1="$1"
  local LINE2="$2"
  local LINE3="$3"
  local LINE4="$4"

  local Y_L1_1=$(( $GAP ))
  local Y_L1_2=$(( $Y_L1_1 + $LINE_HEIGHT ))
  local Y_S1=$(( $Y_L1_2 + $LINE_HEIGHT + $GAP ))
  local Y_L2_1=$(( $Y_S1 + $GAP ))
  local Y_L2_2=$(( $Y_L2_1 + $LINE_HEIGHT ))
  local Y_S2=$(( $Y_L2_2 + $LINE_HEIGHT + $GAP ))
  local Y_L3_1=$(( $Y_S2 + $GAP ))
  local Y_L3_2=$(( $Y_L3_1 + $LINE_HEIGHT ))
  local Y_S3=$(( $Y_L3_2 + $LINE_HEIGHT + $GAP ))
  local Y_L4_1=$(( $Y_S3 + $GAP ))
  local Y_L4_2=$(( $Y_L4_1 + $LINE_HEIGHT ))

  cat <<COMMANDS > $PRINTER
CODEPAGE UTF-8
DIRECTION $DIRECTION
CLS
TEXT $X_CENTER,$Y_L1_1,"$FONT",0,$FONT_X_MULT,$FONT_Y_MULT,2,"$LINE1"
TEXT $X_CENTER,$Y_L1_2,"$FONT",0,$FONT_X_MULT,$FONT_Y_MULT,2,"$LINE2"
DIAGONAL 0,$Y_S1,70,$Y_S1,1
DIAGONAL 250,$Y_S1,310,$Y_S1,1
DIAGONAL 490,$Y_S1,550,$Y_S1,1
DIAGONAL 730,$Y_S1,800,$Y_S1,1
TEXT $X_CENTER,$Y_L2_1,"$FONT",0,$FONT_X_MULT,$FONT_Y_MULT,2,"$LINE1"
TEXT $X_CENTER,$Y_L2_2,"$FONT",0,$FONT_X_MULT,$FONT_Y_MULT,2,"$LINE2"
DIAGONAL 0,$Y_S2,70,$Y_S2,1
DIAGONAL 250,$Y_S2,310,$Y_S2,1
DIAGONAL 490,$Y_S2,550,$Y_S2,1
DIAGONAL 730,$Y_S2,800,$Y_S2,1
TEXT $X_CENTER,$Y_L3_1,"$FONT",0,$FONT_X_MULT,$FONT_Y_MULT,2,"$LINE3"
TEXT $X_CENTER,$Y_L3_2,"$FONT",0,$FONT_X_MULT,$FONT_Y_MULT,2,"$LINE4"
DIAGONAL 0,$Y_S3,70,$Y_S3,1
DIAGONAL 250,$Y_S3,310,$Y_S3,1
DIAGONAL 490,$Y_S3,550,$Y_S3,1
DIAGONAL 730,$Y_S3,800,$Y_S3,1
TEXT $X_CENTER,$Y_L4_1,"$FONT",0,$FONT_X_MULT,$FONT_Y_MULT,2,"$LINE3"
TEXT $X_CENTER,$Y_L4_2,"$FONT",0,$FONT_X_MULT,$FONT_Y_MULT,2,"$LINE4"
PRINT 1
COMMANDS

  echo $LINE1 $LINE2
  echo $LINE3 $LINE4
}


if [ "$#" = "0" ]
then
  usage
fi

while [ "$#" != "0" ]
do
  case $1 in
    -d | --dry-run) PRINTER=/dev/stdout ;;
    -y | --yes) FORCE=true ;;
    -o | --orient) shift; DIRECTION=$1 ;;
    -h | --help) usage ;;
    --) shift; break ;;
    -*) ;;
    *) break ;;
  esac
  shift
done

if $FORCE || confirm $1 $2 $3 $4
then
  print $1 $2 $3 $4
fi