ComposedShader.h

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//    Copyright 2004, 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 __COMPOSEDSHADER_H__
#define __COMPOSEDSHADER_H__

#include "X3DShaderNode.h"
#include "ShaderPart.h"
#include "X3DProgrammableShaderObject.h"
#include "DependentNodeFields.h"

namespace H3D {

  class H3DAPI_API ComposedShader : 
    public X3DShaderNode, 
    public X3DProgrammableShaderObject {
  public:
  
    typedef DependentMFNode< ShaderPart,
                             FieldRef< X3DUrlObject, 
                                       MFString, 
                                       &ShaderPart::url >,
                             true >
    MFShaderPart;

    ComposedShader( Inst< DisplayList  > _displayList = 0,
                    Inst< SFNode       > _metadata    = 0,
                    Inst< SFBool       > _isSelected  = 0,
                    Inst< SFBool       > _isValid     = 0,
                    Inst< SFBool       > _activate    = 0,
                    Inst< SFString     > _language    = 0,
                    Inst< MFShaderPart > _parts       = 0 );

    virtual bool addField( const string &name,
                           const Field::AccessType &access,
                           Field *field );
    
    virtual void render();

    virtual void preRender();

    virtual void postRender();

    auto_ptr< MFShaderPart > parts;

    static H3DNodeDatabase database;
  protected:
    static bool shader_support_checked;  

    GLhandleARB program_handle;

    vector< GLhandleARB > current_shaders;
  };
}

#endif

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