RenderStageSequence.h

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/*
 *  Copyright (C) 2010 - 2015 Leonid Kostrykin
 *
 *  Chair of Medical Engineering (mediTEC)
 *  RWTH Aachen University
 *  Pauwelsstr. 20
 *  52074 Aachen
 *  Germany
 *
 */

#ifndef RENDERSTAGESEQUENCE_H_0874895466
#define RENDERSTAGESEQUENCE_H_0874895466

#include <Carna/Carna.h>
#include <Carna/base/Aggregation.h>
#include <Carna/base/noncopyable.h>
#include <memory>

namespace Carna
{

namespace base
{



// ----------------------------------------------------------------------------------
// RenderStageSequence
// ----------------------------------------------------------------------------------

class CARNA_LIB RenderStageSequence
{

    NON_COPYABLE
    
    struct Details;
    const std::unique_ptr< Details > pimpl;

public:

    RenderStageSequence();

    virtual ~RenderStageSequence();

    std::size_t stages() const;
    
    void appendStage( RenderStage* stage );
    
    virtual void clearStages();
    
    RenderStage& stageAt( std::size_t position ) const;

    template< typename RenderStage >
    Aggregation< RenderStage > findStage() const;
    
protected:

    void releaseStages();

}; // RenderStageSequence


template< typename RenderStage >
Aggregation< RenderStage > RenderStageSequence::findStage() const
{
    for( std::size_t index = 0; index < stages(); ++index )
    {
        RenderStage* const rs = dynamic_cast< RenderStage* >( &stageAt( index ) );
        if( rs != nullptr )
        {
            return Aggregation< RenderStage >( *rs );
        }
    }
    return Aggregation< RenderStage >::NULL_PTR;
}



}  // namespace Carna :: base

}  // namespace Carna

#endif // RENDERSTAGESEQUENCE_H_0874895466