Converts JASC palette files to raw bytes.

jasc_convert.py

#!/usr/bin/env python
import argparse
from struct import *
import re

def write_raw_palette(palette, output_path, write_header):
	data = ""

	header = pack('I', len(palette))

	if write_header:
		data += header


	for entry in palette:
		color = pack('BBB', entry[0], entry[1], entry[2])
		data += color

	f = open(output_path, 'wb')
	f.write(data)
	f.close()

parser = argparse.ArgumentParser(description=
	"""
	Converts palettes from JASC format to raw bytes.

	The output palette file will contain a 4-byte unsigned integer 
	with the number of palette entries. Rest of the file is three
	byte color entries.

	
	"""
)
parser.add_argument('jasc_palette', help="The JASC-PAL ASCII file")
parser.add_argument('raw_palette', help="Destination raw palette")
parser.add_argument("--no-header", action="store_true", help="write only the color entry bytes")

args = parser.parse_args()

path = args.jasc_palette
output_path = args.raw_palette

palette = []

with open(path) as f:
	data = list(f.read().splitlines())

magic = data.pop(0)
version = data.pop(0)
amount = int(data.pop(0))

print "%d colors" % (amount)

for line in data:
		entry = line.strip().split(" ")
		entry = map(int, entry)
		palette.append(entry)

assert len(palette) == amount

write_raw_palette(palette, output_path, not args.no_header)