: '
build.it - documented shell script to create HP Laserjet Series II
           initialization file that downloads a different character 127

'

ESC='\033'
{
echo "$ESC(s0p10h12v0s0b3T\c" # Select FX-NORMAL font (SEE NOTE 1)
echo "$ESC*c6F\c"          # Copy current font (SEE NOTE 2)
echo "$ESC*c127E\c"        # Set character code to 127 (in copied font)
echo "$ESC(s160W\c"        # Prefix block header (160 is byte count:
                           # 16 byte header + 144 bytes data)
echo "\004\000\016\001\c"  # Descriptor header start
echo "\000\c"              # Portrait orientation (001 for landscape)
echo "\000\c"              # Filler
echo "\000\000\c"          # Left offset - 0
echo "\000\036\c"          # Top offset - 30
echo "\000\032\c"          # Character width - 26  (SEE NOTE 3)
echo "\000\050\c"          # Character height - 41
echo "\000\0150\c"         # Delta X (post character shift) - 104
                           # (SEE NOTE 3)

# Loops below are to create a stream of 144 (18x8) characters in
# alternate batches of 8 each with a different pattern (PAT). These
# 144 characters are a dot pattern for the new character

PAT=
for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18; do
   # Toggle pattern every 8 characters:
   case "$PAT" in
       *1 ) PAT="\020";;
         *) PAT="\001";;
   esac
   for j in 1 2 3 4 5 6 7 8; do
      echo "$PAT\c"
   done
done

} > hp_jet+.127