/indra/newview/app_settings/shaders/class2/effects/colorFilterF.glsl

 1/**
 2 * @file colorFilterF.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 sampler2DRect RenderTexture;
29uniform float brightness;
30uniform float contrast;
31uniform vec3  contrastBase;
32uniform float saturation;
33uniform vec3  lumWeights;
34
35const float gamma = 2.0;
36
37void main(void) 
38{
39	vec3 color = vec3(texture2DRect(RenderTexture, gl_TexCoord[0].st));
40
41	/// Modulate brightness
42	color *= brightness;
43
44	/// Modulate contrast
45	color = mix(contrastBase, color, contrast);
46
47	/// Modulate saturation
48	color = mix(vec3(dot(color, lumWeights)), color, saturation);
49
50	gl_FragColor = vec4(color, 1.0);
51}