ShaderImageNode.h

Go to the documentation of this file.

//    Copyright 2004-2019, SenseGraphics AB
//
//    This file is part of H3D API.
//
//    H3D API 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.
//
//    H3D API 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 H3D API; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//    A commercial license is also available. Please contact us at 
//    www.sensegraphics.com for more information.
//
//
//
#ifndef __SHADERIMAGENode_H__
#define __SHADERIMAGENode_H__
 
#include <H3D/H3DSingleTextureNode.h>
 
namespace H3D {
 
  class H3DAPI_API ShaderImageNode : 
    public H3DSingleTextureNode {
  public:
  
    ShaderImageNode( Inst< DisplayList > _displayList = 0,
                            Inst< SFNode>  _metadata = 0 );
 
    virtual void preRender( ){};
 
    virtual void postRender(){};
 
    virtual void enableTexturing(){};
    virtual void disableTexturing(){};
 
    virtual unsigned int getImageUnit ( ){
      return image_unit;
    }
    virtual void setImageUnit ( unsigned int _image_unit ){
      image_unit = _image_unit;
    }
 
    virtual ~ShaderImageNode ( );
  protected:
 
    GLuint image_unit;
 
    
    // collection of all the current image units already used, 
    //it is be used to help generate non-identical image unit id
    static set<unsigned int> global_image_units;
    // lock to ensure the access to global_image_units is always safe
    static H3DUtil::MutexLock global_image_units_lock;
    static unsigned int max_image_unit;
 
    H3DUniquePtr< Field > reinitShaderImage;
  };
}
 
#endif