ckeyDst.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.
*/
#extension GL_ARB_texture_rectangle : enable
uniform sampler2DRect uDstTex;
uniform vec4 uDstClr;
void vboxCKeyDst(void)
{
vec4 dstClr = texture2DRect(uDstTex, vec2(gl_TexCoord[1]));
vec3 difClr = dstClr.rgb - uDstClr.rgb;
if(any(greaterThan(difClr, vec3(0.01, 0.01, 0.01)))
|| any(lessThan(difClr, vec3(-0.01, -0.01, -0.01))))
discard;
}