1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Rickard Lindberg, Roger Lindberg
#
# This file is part of Timeline.
#
# Timeline is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Timeline 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Timeline. If not, see <http://www.gnu.org/licenses/>.
GRAY_FACTOR = 1.2
LUMINENCE_FACTOR = 0.8
def get_progress_color(base_color):
"""
Return a color that is slightly brighter then the base_color.
For shades of gray the constant GRAY_FACTOR decides the brightness.
Higher factor gives more brightness.
For other colors the LUMINENCE_FACTOR decides the brightness.
Smaller factor gives more brightness.
"""
if min(base_color) == max(base_color):
return _adjust_gray_luminence(base_color)
else:
return _adjust_color_luminence(base_color)
def _adjust_gray_luminence(base_color):
r = _apply_gray_factor_on_item(base_color[0])
g = _apply_gray_factor_on_item(base_color[1])
b = _apply_gray_factor_on_item(base_color[2])
return (r, g, b)
def _apply_gray_factor_on_item(item):
return min(255, int(GRAY_FACTOR * item))
def _adjust_color_luminence(base_color):
h, s, _ = _rgb2hsl(base_color)
l = LUMINENCE_FACTOR * s
return _hsl2rgb(h, s, l)
def _rgb2hsl(color):
r = float(color[0]) / 255.0
g = float(color[1]) / 255.0
b = float(color[2]) / 255.0
var_min = min(r, g, b)
var_max = max(r, g, b)
del_max = var_max - var_min
l = (var_max + var_min) / 2.0
if del_max == 0:
h = 0
s = 0
else:
if l < 0.5:
s = del_max / (var_max + var_min)
else:
s = del_max / (2.0 - var_max - var_min)
del_r = (((var_max - r) / 6.0) + (del_max / 2.0)) / del_max
del_g = (((var_max - g) / 6.0) + (del_max / 2.0)) / del_max
del_b = (((var_max - b) / 6.0) + (del_max / 2.0)) / del_max
if (r == var_max):
h = del_b - del_g
elif (g == var_max):
h = (1.0 / 3.0) + del_r - del_b
elif (b == var_max):
h = (2.0 / 3.0) + del_g - del_r
if (h < 0):
h += 1.0
if (h > 1.0):
h -= 1.0
return (h, s, l)
def _hsl2rgb(h, s, l):
if s == 0:
r = l * 155
g = l * 255
b = l * 255
else:
if (l < 0.5):
var_2 = l * (1.0 + s)
else:
var_2 = (l + s) - (s * l)
var_1 = 2.0 * l - var_2
r = 255 * _hue_2_rgb(var_1, var_2, h + (1.0 / 3.0))
g = 255 * _hue_2_rgb(var_1, var_2, h)
b = 255 * _hue_2_rgb(var_1, var_2, h - (1.0 / 3.0))
return (int(r), int(g), int(b))
def _hue_2_rgb(v1, v2, vh):
if (vh < 0):
vh += 1.0
if (vh > 1.0):
vh -= 1.0
if ((6.0 * vh) < 1):
return (v1 + (v2 - v1) * 6.0 * vh)
if ((2.0 * vh) < 1.0):
return (v2)
if ((3.0 * vh) < 2.0):
x = (v1 + (v2 - v1) * ((2.0 / 3.0 - vh) * 6.0))
return x
return v1
|
