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/indra/newview/app_settings/shaders/class2/windlight/gammaF.glsl

https://bitbucket.org/lindenlab/viewer-beta/
Unknown | 44 lines | 36 code | 8 blank | 0 comment | 0 complexity | a9e0930932b2da013b86b3987b7718f0 MD5 | raw file
 1/** 
 2 * @file gammaF.glsl
 3 *
 4 * $LicenseInfo:firstyear=2007&license=viewerlgpl$
 5 * Second Life Viewer Source Code
 6 * Copyright (C) 2007, Linden Research, Inc.
 7 * 
 8 * This library is free software; you can redistribute it and/or
 9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation;
11 * version 2.1 of the License only.
12 * 
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * Lesser General Public License for more details.
17 * 
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
21 * 
22 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
23 * $/LicenseInfo$
24 */
25 
26
27
28uniform vec4 gamma;
29
30vec3 getAtmosAttenuation();
31
32/// Soft clips the light with a gamma correction
33vec3 scaleSoftClip(vec3 light) {
34	//soft clip effect:
35	light = 1. - clamp(light, vec3(0.), vec3(1.));
36	light = 1. - pow(light, gamma.xxx);
37
38	return light;
39}
40
41vec3 fullbrightScaleSoftClip(vec3 light) {
42	return mix(scaleSoftClip(light.rgb), light.rgb, getAtmosAttenuation());
43}
44