/*
 *	osgART/GenericVideoObject
 *	osgART: AR ToolKit for OpenSceneGraph
 *
 *	Copyright (c) 2005-2007 ARToolworks, Inc. All rights reserved.
 *	
 *	Rev		Date		Who		Changes
 *  1.0   	2006-12-08  ---     Version 1.0 release.
 *
 */
/*
 * This file is part of osgART - AR Toolkit for OpenSceneGraph
 *
 * Copyright (c) 2005-2007 ARToolworks, Inc. All rights reserved.
 *
 * (See the AUTHORS file in the root of this distribution.)
 *
 *
 * OSGART is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * OSGART 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OSGART; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 *
 */


#include "osgART/GenericVideoObject"

#if defined(_WIN32)
#include <windows.h>
#endif


#if !defined(_MSC_VER) || !defined(_X86_)
#  include <cmath>
#endif


namespace osgART {

	/*static*/
	unsigned int GenericVideoObject::mathNextPowerOf2(unsigned int x)
	{
	#if defined(_MSC_VER) && defined(_X86_)
		unsigned int result = 0;
		_asm   bsr  ecx,x;      // Find the base 2 logarithm
		_asm   inc  ecx;        // Increase it by 1
		_asm   mov  eax,1;
		_asm   shl  eax,cl;     // Find the antilogarithm
		_asm   mov  result,eax;
		return result;          // Return the result
	#else
		return ((unsigned int)(exp2((double)((int)(log2((double)x)) + 1))));
	#endif
	}

	GenericVideoObject::GenericVideoObject(GenericVideo* video) :
		osg::Group(),
		m_vShader(0L),
		m_vTexture(0L),
		m_video(video),
		m_distortionMode(NO_CORRECTION),
		m_textureMode(USE_TEXTURE_RECTANGLE),
		m_videoimage(new osg::Image)
	{
	}

	GenericVideoObject::~GenericVideoObject()
	{
	}

}; // namespace osgART