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;
26 float fx,fy,r,g,b,r2,g2,b2,y1,y2,u,v;
27 fx = gl_TexCoord[0].x;
28 fy = gl_TexCoord[0].y;
29 r=texture2DRect(tex,vec2(fx*2.0,fy)).r;
30 g=texture2DRect(tex,vec2(fx*2.0,fy)).g;
31 b=texture2DRect(tex,vec2(fx*2.0,fy)).b;
32 r2=texture2DRect(tex,vec2(fx*2.0+1.0,fy)).r;
33 g2=texture2DRect(tex,vec2(fx*2.0+1.0,fy)).g;
34 b2=texture2DRect(tex,vec2(fx*2.0+1.0,fy)).b;
35 y1=0.299011*r + 0.586987*g + 0.114001*b;
36 y2=0.299011*r2 + 0.586987*g2 + 0.114001*b2;
37 u=-0.148246*r -0.29102*g + 0.439266*b;
38 v=0.439271*r - 0.367833*g - 0.071438*b ;
39 y1=0.858885*y1 + 0.0625;
40 y2=0.858885*y2 + 0.0625;
43 /* "%s" replaced with "y2,u,y1,v" in conversion to piglit (yuy2 version) */
44 gl_FragColor=vec4(y2,u,y1,v);