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#!/usr/bin/env python
__version__ = "1.0"
from argparse import ArgumentParser
from PIL import Image
# firmware
CPC_PAL = (
[0, 0, 0],
[0, 0, 128],
[0, 0, 255],
[128, 0, 0],
[128, 0, 128],
[128, 0, 255],
[255, 0, 0],
[255, 0, 128],
[255, 0, 255],
[0, 128, 0],
[0, 128, 128],
[0, 128, 255],
[128, 128, 0],
[128, 128, 128],
[128, 128, 255],
[255, 128, 0],
[255, 128, 128],
[255, 128, 255],
[0, 255, 0],
[0, 255, 128],
[0, 255, 255],
[128, 255, 0],
[128, 255, 128],
[128, 255, 255],
[255, 255, 0],
[255, 255, 128],
[255, 255, 255],
)
# hardware
CPC_PAL_HW = (
0x54, 0x44, 0x55, 0x5c, 0x58, 0x5d, 0x4c, 0x45, 0x4d,
0x56, 0x46, 0x57, 0x5e, 0x40, 0x5f, 0x4e, 0x47, 0x4f,
0x52, 0x42, 0x53, 0x5a, 0x59, 0x5b, 0x4a, 0x43, 0x4b,
)
def main():
parser = ArgumentParser(description="PNG to CPC palette (firmware)",
epilog="Copyright (C) 2015 Juan J Martinez <jjm@usebox.net>",
)
parser.add_argument("--version", action="version", version="%(prog)s " + __version__)
parser.add_argument("--hw", action="store_true", dest="hardware")
parser.add_argument("image", help="image to convert")
parser.add_argument("pal_dump", help="filename for the palette dump")
args = parser.parse_args()
try:
image = Image.open(args.image)
except IOError:
parser.error("failed to open the image")
if image.mode != "P":
parser.error("not an indexed image (no palette)")
palette = image.getpalette()
if not palette:
parser.error("failed to extract the palette (is this an indexed image?)")
colors = image.getcolors(maxcolors=16)
if not colors:
parser.error("failed to extract the palette (color limit is 16)")
rgb = []
for _, i in colors:
c = palette[i * 3:i * 3 + 3]
if c not in CPC_PAL:
parser.error("%r not in the CPC palette" % c)
if c not in rgb:
rgb.append(c)
out = [CPC_PAL.index(c) for c in rgb]
if len(out) < 16:
out.extend([i for i in range(16 - len(out))])
if args.hardware:
out = [CPC_PAL_HW[c] for c in out]
with open(args.pal_dump, "wb") as fd:
fd.write(bytearray(out))
if __name__ == "__main__":
main()
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