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diff --git a/source/gameengine/VideoTexture/FilterBlueScreen.h b/source/gameengine/VideoTexture/FilterBlueScreen.h
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+++ b/source/gameengine/VideoTexture/FilterBlueScreen.h
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+/* $Id$
+-----------------------------------------------------------------------------
+This source file is part of blendTex library
+
+Copyright (c) 2007 The Zdeno Ash Miklas
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU Lesser General Public License as published by the Free Software
+Foundation; either version 2 of the License, or (at your option) any later
+version.
+
+This program 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place - Suite 330, Boston, MA 02111-1307, USA, or go to
+http://www.gnu.org/copyleft/lesser.txt.
+-----------------------------------------------------------------------------
+*/
+
+#if !defined FILTERBLUESCREEN_H
+#define FILTERBLUESCREEN_H
+
+#include "Common.h"
+
+#include "FilterBase.h"
+
+
+/// pixel filter for blue screen
+class FilterBlueScreen : public FilterBase
+{
+public:
+	/// constructor
+	FilterBlueScreen (void);
+	/// destructor
+	virtual ~FilterBlueScreen (void) {}
+
+	/// get color
+	unsigned char * getColor (void) { return m_color; }
+	/// set color
+	void setColor (unsigned char red, unsigned char green, unsigned char blue);
+
+	/// get limits for color variation
+	unsigned short * getLimits (void) { return m_limits; }
+	/// set limits for color variation
+	void setLimits (unsigned short minLimit, unsigned short maxLimit);
+
+protected:
+	///  blue screen color (red component first)
+	unsigned char m_color[3];
+	/// limits for color variation - first defines, where ends fully transparent
+	/// color, second defines, where begins fully opaque color
+	unsigned short m_limits[2];
+	/// squared limits for color variation
+	unsigned int m_squareLimits[2];
+	/// distance between squared limits
+	unsigned int m_limitDist;
+
+	/// filter pixel template, source int buffer
+	template <class SRC> unsigned int tFilter (SRC src, short x, short y,
+		short * size, unsigned int pixSize, unsigned int val)
+	{
+		// calculate differences
+		int difRed = int(VT_R(val)) - int(m_color[0]);
+		int difGreen = int(VT_G(val)) - int(m_color[1]);
+		int difBlue = int(VT_B(val)) - int(m_color[2]);
+		// calc distance from "blue screen" color
+		unsigned int dist = (unsigned int)(difRed * difRed + difGreen * difGreen
+			+ difBlue * difBlue);
+		// condition for fully transparent color
+		if (m_squareLimits[0] >= dist) 
+			// return color with zero alpha
+			VT_A(val) = 0;
+		// condition for fully opaque color
+		else if (m_squareLimits[1] <= dist)
+			// return normal colour
+			VT_A(val) = 0xFF;
+		// otherwise calc alpha
+		else
+			VT_A(val) = (((dist - m_squareLimits[0]) << 8) / m_limitDist);
+		return val;
+	}
+
+	/// virtual filtering function for byte source
+	virtual unsigned int filter (unsigned char * src, short x, short y,
+		short * size, unsigned int pixSize, unsigned int val = 0)
+	{ return tFilter(src, x, y, size, pixSize, val); }
+	/// virtual filtering function for unsigned int source
+	virtual unsigned int filter (unsigned int * src, short x, short y,
+		short * size, unsigned int pixSize, unsigned int val = 0)
+	{ return tFilter(src, x, y, size, pixSize, val); }
+};
+
+
+#endif