/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield 
 *
 * This library is open source and may be redistributed and/or modified under  
 * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
 * (at your option) any later version.  The full license is in LICENSE file
 * included with this distribution, and on the openscenegraph.org website.
 * 
 * This library 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 
 * OpenSceneGraph Public License for more details.
*/

#ifndef OSGUTIL_RENDERSTAGELIGHTING
#define OSGUTIL_RENDERSTAGELIGHTING 1

#include <osg/Object>
#include <osg/Light>
#include <osg/State>

#include <osgUtil/RenderLeaf>
#include <osgUtil/RenderGraph>

namespace osgUtil {

/**
 * RenderStageLighting base class. Used in RenderStage class.
 */
class OSGUTIL_EXPORT RenderStageLighting : public osg::Object
{
    public:
    

        RenderStageLighting();
        virtual osg::Object* cloneType() const { return new RenderStageLighting(); }
        virtual osg::Object* clone(const osg::CopyOp&) const { return new RenderStageLighting(); } // note only implements a clone of type.
        virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const RenderStageLighting*>(obj)!=0L; }
        virtual const char* libraryName() const { return "osgUtil"; }
        virtual const char* className() const { return "RenderStageLighting"; }

        virtual void reset();
        
        typedef std::pair< osg::ref_ptr<const osg::StateAttribute> , osg::ref_ptr<osg::RefMatrix> >    AttrMatrixPair;
        typedef std::vector< AttrMatrixPair >                                            AttrMatrixList;
        typedef std::map< unsigned int, AttrMatrixList >                                 TexUnitAttrMatrixListMap;

        virtual void addPositionedAttribute(osg::RefMatrix* matrix,const osg::StateAttribute* attr)
        {
            _attrList.push_back(AttrMatrixPair(attr,matrix));
        }

        virtual void addPositionedTextureAttribute(unsigned int textureUnit, osg::RefMatrix* matrix,const osg::StateAttribute* attr)
        {
            _texAttrListMap[textureUnit].push_back(AttrMatrixPair(attr,matrix));
        }

        virtual void draw(osg::State& state,RenderLeaf*& previous, const osg::Matrix* postMultMatrix = 0);
        
    public:
        
        AttrMatrixList              _attrList;
        TexUnitAttrMatrixListMap    _texAttrListMap;
        
    protected:
    
        virtual ~RenderStageLighting();

};

}

#endif