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
|
/*
* This program 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 2
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* Color Management */
float color_srgb_to_scene_linear(float c)
{
if(c < 0.04045)
return (c < 0.0)? 0.0: c * (1.0/12.92);
else
return pow((c + 0.055)*(1.0/1.055), 2.4);
}
float color_scene_linear_to_srgb(float c)
{
if(c < 0.0031308)
return (c < 0.0)? 0.0: c * 12.92;
else
return 1.055 * pow(c, 1.0/2.4) - 0.055;
}
color color_srgb_to_scene_linear(color c)
{
return color(
color_srgb_to_scene_linear(c[0]),
color_srgb_to_scene_linear(c[1]),
color_srgb_to_scene_linear(c[2]));
}
color color_scene_linear_to_srgb(color c)
{
return color(
color_scene_linear_to_srgb(c[0]),
color_scene_linear_to_srgb(c[1]),
color_scene_linear_to_srgb(c[2]));
}
|