From 292d4a581db0d731288b73296c5cab10341f7080 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Wed, 12 Feb 2014 23:03:46 +0100 Subject: brightness gamma and contrast support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- src/__main__.py | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100755 src/__main__.py (limited to 'src') diff --git a/src/__main__.py b/src/__main__.py new file mode 100755 index 0000000..257ed3e --- /dev/null +++ b/src/__main__.py @@ -0,0 +1,65 @@ +#!/usr/bin/env python3 + +# Copyright © 2014 Mattias Andrée (maandree@member.fsf.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 . + + +r_curve = [i / 255 for i in range(256)] +g_curve = [i / 255 for i in range(256)] +b_curve = [i / 255 for i in range(256)] + + +def curves(r, g, b): + return ((r_curve, r), (g_curve, g), (b_curve, b)) + + +def contrast(r, g, b): + for (curve, level) in curves(r, g, b): + if not level == 1.0: + for i in range(256): + curve[i] = (curve[i] - 0.5) * level + 0.5 + +def brightness(r, g, b): + for (curve, level) in curves(r, g, b): + if not level == 1.0: + for i in range(256): + curve[i] *= level + +def gamma(r, g, b): + for (curve, level) in curves(r, g, b): + if not level == 1.0: + for i in range(256): + curve[i] **= level + +def clip(): + for curve in (r_curve, g_curve, b_curve): + for i in range(256): + curve[i] = min(max(0.0, curve[i]), 1.0) + + +contrast(1.0, 1.0, 1.0) +brightness(1.0, 1.0, 1.0) +gamma(1.0, 1.0, 1.0) +temperature(1.0, 1.0, 1.0) +clip() + + +for curve in (r_curve, g_curve, b_curve): + for i in range(256): + curve[i] = int(curve[i] * 65535 + 0.5) +print(r_curve) +print(g_curve) +print(b_curve) + -- cgit v1.2.3-70-g09d2