//-*-c++-*-
/**
 Authors: David Auber, Patrick Mary, Morgan Mathiaut
 from the LaBRI Visualization Team
 Email : auber@tulip-software.org
 Last modification : 22/01/2009 
 This program 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.
*/
#ifndef Tulip_GLFEEDBACKRECORDER_H
#define Tulip_GLFEEDBACKRECORDER_H

#include <tulip/tulipconf.h>
#include <stdlib.h>

#include <tulip/Vector.h>

#include "tulip/GlFeedBackBuilder.h"

namespace tlp {

  /** \brief Class use to build an object with an OpenGL feedback buffer
   *
   * Class use to build an object with an OpenGL feedback buffer
   * This class call functions of the GlFeedBackBuilder passed to the constructor
   */
  class TLP_GL_SCOPE GlFeedBackRecorder {
  
  public:
    
    /**
     * Constructor : the recorder use GlFeedBackBuilder : builder
     */
    GlFeedBackRecorder(GlFeedBackBuilder *builder,unsigned int pointSize=7):
      feedBackBuilder(builder),
      pointSize(pointSize){}
    /**
     * Record a new feedback buffer 
     * \param doSort : sort the feedback buffer
     * \param size : size of the feedback buffer
     * \param feedBackBuffer : the feedback buffer
     * \param viewport : the viewport of the scene
     */
    void record(bool doSort, GLint size, GLfloat *feedBackBuffer,const Vector<int,4>& viewport);
    
  private:

    void sortAndRecord(GLint size, GLfloat *feedBackBuffer);
    void record(GLint size, GLfloat *feedBackBuffer);
    GLfloat* recordPrimitive(GLfloat *loc);
    
    GlFeedBackBuilder *feedBackBuilder;
    unsigned int pointSize;

  };
 
}

#endif // Tulip_GLFEEDBACKRECORDER_H