26 lines
648 B
Python
26 lines
648 B
Python
#!/usr/bin/python3
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""" Extract a GBA-compatible palette from a PNG. """
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import sys
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import os.path
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import png
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PAL_PRELUDE = 'JASC-PAL\n0100\n'
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def extract_palette(path):
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r = png.Reader(path)
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r.read()
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root, _ = os.path.splitext(path)
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out_path = root + '.pal'
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with open(out_path, 'w', newline='\r\n') as f:
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f.write(PAL_PRELUDE)
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colors = r.palette()
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if len(colors) < 16:
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colors += [(0, 0, 0) for _ in range(16-len(colors))]
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f.write(f'{len(colors)}\n')
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for r, g, b in colors:
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f.write(f'{r} {g} {b}\n')
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if __name__ == '__main__':
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extract_palette(*sys.argv[1:])
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