makea8.py

from PIL import Image
from struct import pack,unpack
from random import randint
import pdb
import sys
im=Image.open(sys.argv[1])
colors={}

for i in range(256):
	r,g,b = unpack('3B',im.palette.palette[i*3:i*3+3])
	colors[i]=(r,g,b,255)
with open('rat.a8','wb') as f:
	f.write('\xA3\xA2\xA1\xA0')
	f.write(pack('<LLLLL',im.size[0],im.size[1],8,0,0))
	for c in range(256):
		r,g,b,a=colors[c]
		f.write(pack('BBBB',b,g,r,255))
	for y in range(im.size[1]-1,-1,-1):
		for x in range(im.size[0]):
			d=im.getpixel((x,y))
			f.write(chr(d))