VolumeRenderingStage.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 VOLUMERENDERINGSTAGE_H_6014714286
#define VOLUMERENDERINGSTAGE_H_6014714286

#include <Carna/base/GeometryStage.h>
#include <Carna/base/Renderable.h>
#include <Carna/Carna.h>
#include <map>

namespace Carna
{

namespace presets
{



// ----------------------------------------------------------------------------------
// VolumeRenderingStage
// ----------------------------------------------------------------------------------

class CARNA_LIB VolumeRenderingStage : public base::GeometryStage< base::Renderable::BackToFront >
{

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

    struct VideoResources;
    std::unique_ptr< VideoResources > vr;

public:

    const static unsigned int DEFAULT_SAMPLE_RATE = 200;

    explicit VolumeRenderingStage( unsigned int geometryType );

    virtual ~VolumeRenderingStage();

    void setSampleRate( unsigned int sampleRate );
    
    unsigned int sampleRate() const;

    virtual void renderPass
        ( const base::math::Matrix4f& viewTransform
        , base::RenderTask& rt
        , const base::Viewport& vp ) override;

protected:

    virtual unsigned int loadVideoResources();

    virtual void render( const base::Renderable& ) override;

    virtual void createVolumeSamplers( const std::function< void( unsigned int, base::Sampler* ) >& registerSampler ) = 0;

    virtual const base::ShaderProgram& acquireShader() = 0;

    virtual const std::string& uniformName( unsigned int role ) const = 0;

    virtual void configureShader() = 0;
    
    virtual void configureShader( const base::Renderable& ) = 0;

}; // VolumeRenderingStage



}  // namespace Carna :: presets

}  // namespace Carna

#endif // VOLUMERENDERINGSTAGE_H_6014714286