33 lines
1.0 KiB
Python
33 lines
1.0 KiB
Python
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#!/usr/bin/env python
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from sys import argv, stderr, exit
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if __name__ == "__main__":
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if len(argv[1:]) != 1:
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print('usage: %s PATH' % argv[0])
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exit(0)
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path = argv[1]
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# we index each pixel into this list to see what value to use
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# this should be exactly 4 values in the range 0-3.
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# normally you won't want two duplicate values, since this
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# will lose information.
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translate = [3, 1, 2, 0]
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for i, line in enumerate(open(path, 'r')):
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toks = line.strip().split()
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if len(toks) != 16:
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stderr.write('line %d is invalid: %r\n' % (i + 1, line))
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exit(1)
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bytes = [int(t, 16) for t in toks]
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output = [0] * 16
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for i in range(0, 8):
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for j in range(0, 8):
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x = (bytes[i] >> j) & 1
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y = (bytes[i + 8] >> j) & 1
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z = translate[x + y * 2]
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output[i] |= ((z & 1) << j)
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output[i + 8] |= (((z & 2) << j) // 2)
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print(' '.join(['%02x' % o for o in output]))
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