Mercurial > libervia-backend
view sat/tools/common/utils.py @ 3231:e756e0eb1be4
core (memory/encryption): automatic start encryption if peer send encrypted message:
If peer sends encrypted message and we have no encryption activated, we automatically
start encryption to avoid sending plain text message when answering.
markAsEncrypted now needs the encryption algorithm namespace as mandatory argument.
author | Goffi <goffi@goffi.org> |
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date | Mon, 23 Mar 2020 17:52:18 +0100 |
parents | 9d0df638c8b4 |
children | 1649bbe8d07e |
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#!/usr/bin/env python3 # SàT: a XMPP client # Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org) # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU Affero General Public License for more details. # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. """Misc utils for both backend and frontends""" def per_luminance(red, green, blue): """Caculate the perceived luminance of a RGB color @param red(int): 0-1 normalized value of red @param green(int): 0-1 normalized value of green @param blue(int): 0-1 normalized value of blue @return (float): 0-1 value of luminance (<0.5 is dark, else it's light) """ # cf. https://stackoverflow.com/a/1855903, thanks Gacek return 0.299 * red + 0.587 * green + 0.114 * blue