text: //////////////////////////////////////////////////////////////////////////
  //
  //  Copyright (c) 2016, Image Engine Design Inc. All rights reserved.
  //
  //  Redistribution and use in source and binary forms, with or without
  //  modification, are permitted provided that the following conditions are
  //  met:
  //
  //      * Redistributions of source code must retain the above
  //        copyright notice, this list of conditions and the following
  //        disclaimer.
  //
  //      * Redistributions in binary form must reproduce the above
  //        copyright notice, this list of conditions and the following
  //        disclaimer in the documentation and/or other materials provided with
  //        the distribution.
  //
  //      * Neither the name of John Haddon nor the names of
  //        any other contributors to this software may be used to endorse or
  //        promote products derived from this software without specific prior
  //        written permission.
  //
  //  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  //  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  //  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  //  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  //  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  //  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  //  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  //  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  //  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  //  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  //  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  //
  //////////////////////////////////////////////////////////////////////////
  
  #ifndef GAFFERSCENE_RENDER_H
  #define GAFFERSCENE_RENDER_H
  
  #include "GafferScene/Export.h"
  #include "GafferScene/TypeIds.h"
  
  #include "GafferDispatch/TaskNode.h"
  
  #include "Gaffer/NumericPlug.h"
  #include "Gaffer/StringPlug.h"
  
  namespace GafferScene
  {
  
  IE_CORE_FORWARDDECLARE( ScenePlug )
  
  class GAFFERSCENE_API Render : public GafferDispatch::TaskNode
  {
  
  	public :
  
  		Render( const std::string &name=defaultName<Render>() );
  		~Render() override;
  
  		IE_CORE_DECLARERUNTIMETYPEDEXTENSION( GafferScene::Render, GafferScene::RenderTypeId, GafferDispatch::TaskNode );
  
  		enum Mode
  		{
  			RenderMode = 0,
  			SceneDescriptionMode = 1
  		};
  
  		ScenePlug *inPlug();
  		const ScenePlug *inPlug() const;
  
  		Gaffer::StringPlug *rendererPlug();
  		const Gaffer::StringPlug *rendererPlug() const;
  
  		Gaffer::IntPlug *modePlug();
  		const Gaffer::IntPlug *modePlug() const;
  
  		Gaffer::StringPlug *fileNamePlug();
  		const Gaffer::StringPlug *fileNamePlug() const;
  
  		ScenePlug *outPlug();
  		const ScenePlug *outPlug() const;
  
  		IECore::MurmurHash hash( const Gaffer::Context *context ) const override;
  		void execute() const override;
  
  	protected :
  
  		// Constructor for derived classes which wish to hardcode the renderer type. Perhaps
  		// at some point we won't even have derived classes, but instead will always use the
  		// base class? At the moment the main purpose of the derived classes is to force the
  		// loading of the module which registers the required renderer type.
  		Render( const IECore::InternedString &rendererType, const std::string &name );
  
  	private :
  
  		ScenePlug *adaptedInPlug();
  		const ScenePlug *adaptedInPlug() const;
  
  		static size_t g_firstPlugIndex;
  
  };
  
  IE_CORE_DECLAREPTR( Render );
  
  } // namespace GafferScene
  
  #endif // GAFFERSCENE_RENDER_H
  