VRS - The Virtual Rendering System

version 3.3

techniqueprocessor.h

Go to the documentation of this file.

 /**********************************************************************
 VRS - The Virtual Rendering System
 Copyright (C) 2001 Computer Graphics Systems Group at the 
 Hasso-Plattner-Institute, 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.
 **********************************************************************/
// $Id: techniqueprocessor.h 4633 2005-01-03 01:43:11Z klimetschek $
// $Date: 2005-01-03 02:43:11 +0100 (Mon, 03 Jan 2005) $
// $Revision: 4633 $
// $State$
// $Author: klimetschek $
//
// $Log$
// Revision 1.30  2005/01/03 01:43:08  klimetschek
// - modified win32 project layout, splitted vrs.vcproj into vrs_container, vrs_core, vrs_sg, vrs_image, vrs_opengl and vrs_io
// - removed vrs.vcproj
// minor things:
// - added all glutexamples to vrs4glut.sln
// - fixed some problems in glutexamples
// - removed all project references from all VS projects (using solution wide project dependencies instead)
//
// Revision 1.29  2004/11/05 13:58:09  basch
// Class comment changed (Doxygen style)
//
// Revision 1.28  2004/10/27 14:30:10  kirsch
// use isSimple property of ShapeSimplifiers to invoke shaders and techniques
// only once during the shape evaluation process
//
// Revision 1.27  2004/07/09 09:38:26  kirsch
// Moved check of the filter in engine from techniqueprocessor to scene graph.
// This reduces the number of filter checks for an evaluated shape node in the graph.
//
// Revision 1.26  2004/05/11 06:53:30  baumann
// - methods set/getShapeFilter() added
// - method getTechniqueFilter() added
//
// Revision 1.25  2004/03/15 11:30:41  kirsch
// use SceneGraphBuilder only in rendering processors
//
// Revision 1.23  2003/11/29 11:29:23  kirsch
// - added support for local poly attributes
// - removed PolyAttribute::switchDefault() and Attribute::rememberTransform()
// - renamed Engine::SwType: On/Off/All to Engine::SwitchType: ON/OFF/ALL
// - changed class hierarchy of TechniqueProcessor and Technique
// - GLCanvas::prepareRedisplay() / finishRedisplay() now push / pop standard attributes
//
// Revision 1.22  2003/11/07 14:19:24  kirsch
// removed leading underscore from include guards
//
// Revision 1.21  2003/07/23 17:04:49  baumann
// code cleanup (especially untabified)
//
// Revision 1.20  2003/06/24 15:07:48  kirsch
// code cleanup
//
// Revision 1.19  2003/01/14 13:47:23  kirsch
// removed unneeded includes (technique.h)
//
// Revision 1.18  2003/01/13 15:49:20  kirsch
// removed Processor, Rendering, PretraversalProcessor, SynthesizerGL, AntialiasGL
//
// Revision 1.17  2002/11/30 17:01:12  kirsch
// cleaned up includes
//
// Revision 1.16  2002/10/29 10:32:52  baumann
// macros VRS_CLASSNAME_* and VRS_IMPL_TYPEINFO_* removed
//
// Revision 1.15  2002/06/24 14:03:38  baumann
// changed List<T> to Array<T>
//
// Revision 1.14  2002/03/05 12:07:20  nienhaus
// method to receive active techniques added
//
// Revision 1.13  2002/03/04 11:08:34  kersting
// directory structure changes
//
// Revision 1.12  2002/03/03 21:44:25  kosta
// VRS_TYPEINFO-macro rewritten
//
// Revision 1.11  2002/02/19 10:34:13  kosta
// undone all changes since 2002-02-15
//
// Revision 1.8  2002/01/15 16:25:54  kosta
// macros rewritten for a better namespace support
//
// Revision 1.7  2001/11/13 16:36:31  kirsch
// changed line feed to unix style (removed control-M)
//
// Revision 1.6  2001/09/07 11:04:00  kirsch
// implemented currentPass()
//
// Revision 1.5  2001/09/04 15:17:25  kirsch
// documentation updates, code cleanup
//
// Revision 1.4  2001/08/31 15:45:10  kirsch
// changed List to Array for faster access
// Post/Pretraversal is computed simplier
//
// Revision 1.3  2001/08/15 07:33:58  kirsch
// performance: create active technique iterator tecitr_ only once in a pass
//
// Revision 1.2  2001/07/26 15:23:22  kirsch
// enhanced engine to support rendering techniques
//
// Revision 1.1.2.3  2001/06/20 17:34:01  kirsch
// Switches and TransformTable in Engine totally rewritten,
// posttraversal added. SceneConfiguration nodes are now
// properly installed.
//
// Revision 1.1.2.2  2001/06/15 12:56:05  kirsch
// pretraversal integrated, synthesizer replaced, polyattributes don't get
// properly rendered
//
// Revision 1.1.2.1  2001/06/14 10:23:40  kirsch
// techniques and techniqueprocessor, initial revision
//

#ifndef VRS_TECHNIQUEPROCESSOR_H
#define VRS_TECHNIQUEPROCESSOR_H

#include <vrs/sharedobj.h>

namespace VRS {

class Engine;
class Filter;
class Handler;
class Shape;
class Technique;
template<typename T> class Iterator;
template<typename T> class NonPersistentArray;

class VRS_CORE_API TechniqueProcessor : public SharedObj  {
    
public:
    TechniqueProcessor();
    virtual void start(Engine*);
    virtual void stop(Engine*);

    virtual bool preparePass(Engine*);
    virtual void finishPass(Engine*);
    virtual void nextPass(Engine*);
    virtual bool needsPass(Engine*) const;
    virtual int currentPass() const; 

    virtual void eval(Engine*, const Shape*);
    virtual const Handler* getNativeHandler(Engine*, const ID&) const = 0;
    virtual bool handleNatively(Engine*, const Shape*, const Handler*) = 0;
    virtual bool pretraversal(Engine*) const;
    virtual bool maintraversal(Engine*) const;
    virtual bool posttraversal(Engine*) const;

    virtual bool canBeUsed(Engine* engine) const;
    virtual ID category() const; 
    void setShapeFilter(SO<Filter> filter);
    SO<Filter> getShapeFilter() const;

    VRS_TYPEINFO(TechniqueProcessor, SharedObj);

protected:
    virtual SO<Filter> getTechniqueFilter() const { return NULL; }

    bool shapeFilterOK(Engine* E);
    void evalWithTechniquesAndShader(Engine*, const Shape*);
    void registerTechnique(Technique*);
    void unregisterTechnique(Technique*);

    virtual void pushStandardTechniques(Engine*);
    virtual void popStandardTechniques(Engine*);
    void addPass(int pass);

    SO<Technique> preTechnique_;
    SO<Technique> mainTechnique_;
    SO<Technique> postTechnique_;

    Iterator<SO<Technique> >* activeTechniques() const;

    friend class Technique;

private:
    SO<NonPersistentArray<SO<Technique> > > allTechniques_;
    SO<NonPersistentArray<SO<Technique> > > activeTechniques_;
    SO<NonPersistentArray<int> > remainingPasses_;
    SO<Filter> shapeFilter_;

    int activePass_;

    int findNextPass();
    void retrieveActiveTechniques();
};

} // namespace VRS

#endif // VRS_TECHNIQUEPROCESSOR_H

---

Generated on Thu May 24 06:00:16 2012 by Doxygen 1.5.6

© 2001-2010 Hasso-Plattner-Institut | Impressum | Contact