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indexed image to avr pin bitmap

this python script converts an indexed image to the avr pin bitmap equivalent. uses a special gimp palette that maps indexed colors to the pin bitmap. i.e. for the 28 color gimp palette, a bright red indexed pixel will be converted to the byte 00100100.

usage: img2avr.py palette.gpl image.png > image.out

img2avr.py

# copy-it-right

import sys

from PIL import Image


def parse_palette(data):
    palette = []
    after_header = False
    for line in data:
        if line.startswith('#'):
            after_header = True
            continue
        if after_header:
            palette.append(int(line.split()[-1], 2))
    return palette


def main():
    color_pin_map = parse_palette(open(sys.argv[1]))
    image = Image.open(sys.argv[2])

    assert image.mode == 'P', 'image must be indexed'

    sys.stdout.write(chr(int('11111100', 2)))

    for i, px in enumerate(image.getdata()):
        sys.stdout.write(chr(color_pin_map[px]))


if __name__ == '__main__':
    main()

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arcanebolt

indexed image to avr pin bitmap