roar/liboperators/OperatorInvert.py

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#!/usr/bin/env python3
#
# OperatorInvert.py
# Copyright (c) 2018, 2019 Lucio Andrés Illanes Albornoz <lucio@lucioillanes.de>
#
from Operator import Operator
class OperatorInvert(Operator):
name = "Invert colours"
#
# apply(self, region)
def apply(self, region):
for numRow in range(len(region)):
for numCol in range(len(region[numRow])):
region[numRow][numCol][0:2] = [(~r & (16 - 1) if r > 0 else r) for r in region[numRow][numCol][0:2]]
return region
# __init__(self, *args): initialisation method
def __init__(self, *args):
pass
# vim:expandtab foldmethod=marker sw=4 ts=4 tw=120