VRS - The Virtual Rendering System

version 3.3

textureatlasoperator.h

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/******************************************************************************
 * VRS - The Virtual Rendering System
 * Copyright (C) 2003 Computer Graphics Systems Group at the 
 * Hasso-Plattner-Institute (HPI), Potsdam, Germany.
 *
 * This  library  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 2.1 of the License, or (at
 * your option) any later version. 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
 * GNU Lesser General Public License for more details. You should have received
 * a copy of the GNU Lesser+ General Public License along with this library; if
 * not, write to the FreeSoftware Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA, 02111-1307, USA.
 ******************************************************************************/

#ifndef VRS_SG_TEXTUREATLASOPERATOR_H
#define VRS_SG_TEXTUREATLASOPERATOR_H

#include <vrs/visitor.h>
#include <vrs/polygonset.h>
#include <vrs/container/array.h>
#include <vrs/container/dictionary.h>
#include <vrs/container/stack.h>
#include <vrs/sg/scenegraphoperator.h>
#include <vrs/opengl/texturegl.h>
#include <vrs/opengl/textureunitselectorgl.h>
#include <vrs/opengl/textureunitsettinggl.h>
#include <vrs/image/image.h>
#include <vrs/image/textureatlascreator.h>

namespace VRS {

class VRS_CORE_API TextureAtlasOperator : public SceneGraphOperator,
                                                                                        public Visitor<TextureUnitSelectorGL>,
                                                                                        public Visitor<TextureUnitSettingGL>,
                                                                                        public Visitor<TextureGL>,
                                                                                        public Visitor<PolygonSet>,
                                                                                        public Visitor<SceneThing>
{
public:
        TextureAtlasOperator(unsigned int xSize = 1024, unsigned int ySize = 1024) : _xSize(xSize), _ySize(ySize) {}

        virtual void optimizeScene(SO<SceneNode>& scene);
        virtual VisitorBase::VisitMode visit(TextureUnitSelectorGL* selector, bool push);
        virtual VisitorBase::VisitMode visit(TextureUnitSettingGL* setting, bool push);
        virtual VisitorBase::VisitMode visit(TextureGL* texture, bool push);
        virtual VisitorBase::VisitMode visit(PolygonSet* shape, bool push);
        virtual VisitorBase::VisitMode visit(SceneThing* thing, bool push);

private:
        unsigned int _xSize;
        unsigned int _ySize;

        SO<Stack<unsigned int> > unitStack_;
        SO<Dictionary<unsigned int, SO<Stack<SO<TextureGL> > > > > textureStacks_;

        SO<Dictionary<unsigned int, SO<Array<SO<PolygonSet> > > > > shapes_;
        SO<Dictionary<unsigned int, SO<Array<SO<TextureGL> > > > > textures_;
        SO<Dictionary<unsigned int, SO<Array<SO<Image> > > > > images_;
        SO<Stack<SO<SharedObj> > > parentStack_;
        SO<Dictionary<unsigned int, SO<Array<SO<SharedObj> > > > > parents_;

        void setUnit(unsigned int unit);
        void setTexture(TextureGL* texture);

        void addUnitToDictionaries(void);
        void addPolygonSetToDictionary(PolygonSet* polyset);

        void removeUnsuitableShapes(unsigned int unit);
        void replaceTexturesWithAtlas(unsigned int unit, SO<TextureAtlasCreator> atlases, SO<Iterator<SO<Image > > > images);
        void createTextureAtlases(void);
};

} // namespace VRS

#endif // VRS_SG_TEXTUREATLASOPERATOR_H

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