/*
 This file is part of the VRender library.
 Copyright (C) 2005 Cyril Soler (Cyril.Soler@imag.fr)
 Version 1.0.0, released on June 27, 2005.

 http://artis.imag.fr/Members/Cyril.Soler/VRender

 VRender 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.

 VRender 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 VRender; if not, write to the Free Software Foundation, Inc.,
 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
*/

/****************************************************************************

 Copyright (C) 2002-2006 Gilles Debunne (Gilles.Debunne@imag.fr)

This file is part of the QGLViewer library.
 Version 2.2.4-1, released on December 12, 2006.

 http://artis.imag.fr/Members/Gilles.Debunne/QGLViewer

 libQGLViewer 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.

 libQGLViewer 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 libQGLViewer; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*****************************************************************************/

#ifndef _OPTIMIZER_H
#define _OPTIMIZER_H

#include "Types.h"

namespace vrender
{
	// Implements some global optimizations on the polygon sorting.

	class VRenderParams ;
	class Optimizer
	{
		public:
			virtual void optimize(std::vector<PtrPrimitive>&,VRenderParams&) = 0 ;
			virtual ~Optimizer() {} ;
	};

	//  Optimizes visibility by culling primitives which do not appear in the
	// rendered image. Computations are done analytically rather than using an item
	// buffer.

	class VisibilityOptimizer: public Optimizer
	{
		public:
			virtual void optimize(std::vector<PtrPrimitive>&,VRenderParams&) ;
			virtual ~VisibilityOptimizer() {} ;
	};

	//  Optimizes by collapsing together primitives which can be, without
	// perturbating the back to front painting algorithm.

	class PrimitiveSplitOptimizer: public Optimizer
	{
		public:
			virtual void optimize(std::vector<PtrPrimitive>&,VRenderParams&) {}
			virtual ~PrimitiveSplitOptimizer() {} ;
	};

	class BackFaceCullingOptimizer: public Optimizer
	{
		public:
			virtual void optimize(std::vector<PtrPrimitive>&,VRenderParams&) ;
			virtual ~BackFaceCullingOptimizer() {} ;
	};
}

#endif