24 lines
596 B
Python
Executable File
24 lines
596 B
Python
Executable File
#!/usr/bin/python3
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"""Calculates a gamma correction curve to store
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in PROGMEM for a NeoPixel"""
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FACTOR = 2.7 # correction factor
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MAX_IN = 255 # top end of INPUT range
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MAX_OUT = 255 # top end of OUTPUT range
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print('{', end='')
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for index in range(MAX_IN + 1):
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if index > 0:
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print(',', end='')
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if index & 15 == 0:
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print(' \\')
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if index == 0:
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val = 0
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elif index == MAX_IN:
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val = MAX_IN
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else:
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val = (index / MAX_IN) ** FACTOR * MAX_OUT + 0.5
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val = - (- val // 1) # round up
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print('{0:>3d}'.format(int(val)), end='')
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print('}')
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