3 * Copyright (C) 2007 David A. Schleef <ds@schleef.org>
4 * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
5 * Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
23 #extension GL_ARB_texture_rectangle : enable
24 uniform sampler2DRect tex;
27 vec2 nxy=gl_TexCoord[0].xy;
28 y=texture2DRect(tex,nxy).r;
29 u=texture2DRect(tex,nxy).g;
30 v=texture2DRect(tex,nxy).b;
35 g=y-0.39173*u-0.81290*v;
37 gl_FragColor=vec4(r,g,b,1.0);