import math
from .utils import *
class Pixel(object):
def __init__(self, r, g, b):
d = max(r, max(g, b))
if (d < EPS):
self.r = 0
self.g = 0
self.b = 0
self.e = 0
return
m, ie = math.frexp(d)
d = m * 256.0 / d
self.r = int(clamp(r * d, (0, 255)))
self.g = int(clamp(g * d, (0, 255)))
self.b = int(clamp(b * d, (0, 255)))
self.e = int(clamp(ie + 128, (0, 255)))
def get(self, i):
return self.__getitem__(i)
def __getitem__(self, i):
if i == 0: return self.r
if i == 1: return self.g
if i == 2: return self.b
if i == 3: return self.e
raise Exception('Pixel has only 4 channels. {0} specified.'.format(i))
