cconvApplyAYUV.c revision 3e1c4447f9ae4b44caf72d405973bd68e34a21d1
/* $Id$ */
/** @file
*
* VBox frontends: Qt4 GUI ("VirtualBox"):
* Shader programming for VBoxFBOverlay.
*/
/*
* Copyright (C) 2009-2011 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
void vboxCConvApplyAYUV(vec4 color)
{
float y, u, v, r, g, b;
y = color.g;
u = color.r;
v = color.a;
u = u - 0.5;
v = v - 0.5;
y = 1.164*(y-0.0625);
b = y + 2.018*u;
g = y - 0.813*v - 0.391*u;
r = y + 1.596*v;
gl_FragColor = vec4(r,g,b,1.0);
}