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

https://bitbucket.org/lindenlab/viewer-beta/
text | 42 lines | 36 code | 6 blank | 0 comment | 0 complexity | 8108eb6133e1293a9fa9a6512284dfd9 MD5 | raw file
 1/**
 2 * @file extractF.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 extractLow;
30uniform float extractHigh;
31uniform vec3 lumWeights;
32
33void main(void) 
34{
35	/// Get scene color
36	vec3 color = vec3(texture2DRect(RenderTexture, gl_TexCoord[0].st));
37	
38	/// Extract luminance and scale up by night vision brightness
39	float lum = smoothstep(extractLow, extractHigh, dot(color, lumWeights));
40
41	gl_FragColor = vec4(vec3(lum), 1.0);
42}