1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// [config]
// expect_result: pass
// glsl_version: 1.10
//
// [end config]
/*
* GStreamer
* Copyright (C) 2007 David A. Schleef <ds@schleef.org>
* Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
* Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#extension GL_ARB_texture_rectangle : enable
uniform sampler2DRect tex;
uniform float w, h;
void main(void) {
float r,g,b,r2,b2,g2,y,u,v;
vec2 nxy=gl_TexCoord[0].xy;
vec2 nxy2=mod(2.0*nxy, vec2(w, h));
r=texture2DRect(tex,nxy).r;
g=texture2DRect(tex,nxy).g;
b=texture2DRect(tex,nxy).b;
r2=texture2DRect(tex,nxy2).r;
g2=texture2DRect(tex,nxy2).g;
b2=texture2DRect(tex,nxy2).b;
y=0.299011*r + 0.586987*g + 0.114001*b;
u=-0.148246*r2 -0.29102*g2 + 0.439266*b2;
v=0.439271*r2 - 0.367833*g2 - 0.071438*b2 ;
y=0.858885*y + 0.0625;
u=u + 0.5;
v=v + 0.5;
gl_FragData[0] = vec4(y, 0.0, 0.0, 1.0);
gl_FragData[1] = vec4(u, 0.0, 0.0, 1.0);
gl_FragData[2] = vec4(v, 0.0, 0.0, 1.0);
}
|
