4cade/bin/packhgrfile.py

#!/usr/bin/env python3
import sys

infile = sys.argv[1]
outfile = sys.argv[2]

i = open(infile,"rb")
filedata = i.read()
i.close

# If the file has a JMP in the last screen hole, the
# game has an animated title, skip packing and copy
# the file as is instead.
if(len(filedata) >= 8192 and filedata[8189] == 0x4c):
  print (infile, "has animation, not packing")
  outdata = bytearray(filedata[0:8192])
else:
  outdata = bytearray(filedata[0:7680])

  for h in range(60):
    oh = h*128+120
    ih = h*8+7680+(int(h/15)*8)
    outdata[oh:oh+8] = filedata[ih:ih+8]

o = open(outfile,"wb")
o.write(outdata)
o.close