#!/usr/bin/python3
"""Calculates a gamma correction curve to store
in PROGMEM for a NeoPixel"""

FACTOR = 2.8 # correction factor
MAX_IN = 255 # top end of INPUT range
MAX_OUT = 255 # top end of OUTPUT range

print('{', end='')
for index in range(MAX_IN + 1):
    if index > 0:
        print(',', end='')
    if index & 15 == 0:
        print(' \\')
    if index == 0:
        val = 0
    elif index == MAX_IN:
        val = MAX_IN
    else:
        val = (index / MAX_IN) ** FACTOR * MAX_OUT + 0.5
        val = - (- val // 1) # round up
    print('{0:>3d}'.format(int(val)), end='')
print('}')