cxTextureSlicePainter.h

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/*=========================================================================
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Copyright (c) 2008-2014, SINTEF Department of Medical Technology
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/*
 * vmTextureSlicePainter.h
 *
 *  Created on: Oct 13, 2009
 *      Author: petterw
 */

#ifndef CXTEXTURESLICEPAINTER_H_
#define CXTEXTURESLICEPAINTER_H_

#include "cxResourceVisualizationExport.h"

#include <boost/shared_ptr.hpp>
#include <QString>
#include <vector>
#include "vtkForwardDeclarations.h"
#include "cxForwardDeclarations.h"
#include "cxConfig.h"

#ifndef CX_VTK_OPENGL2
#include <vtkOpenGLRepresentationPainter.h>
#endif

class vtkOpenGLRenderWindow;
class vtkUniformVariables;
//---------------------------------------------------------
namespace cx
{

#if !defined(CX_VTK_OPENGL2) && !defined(WIN32)

class cxResourceVisualization_EXPORT SingleVolumePainterHelper
{
        GPUImageDataBufferPtr mVolumeBuffer;
        GPUImageLutBufferPtr mLutBuffer;
        int mIndex;
        float mWindow;
        float mLevel;
        float mLLR;
        float mAlpha;

public:
        explicit SingleVolumePainterHelper(int index);
        SingleVolumePainterHelper();
        ~SingleVolumePainterHelper();
        void SetBuffer(GPUImageDataBufferPtr buffer);
        void SetBuffer(GPUImageLutBufferPtr buffer);
        void SetColorAttribute(float window, float level, float llr,float alpha);
        void initializeRendering();
        void setUniformiArray(vtkUniformVariables* uniforms, QString name, int val);
        void setUniformfArray(vtkUniformVariables* uniforms, QString name, float val);
        void eachRenderInternal(vtkSmartPointer<vtkShaderProgram2> shader);
};


class cxResourceVisualization_EXPORT TextureSlicePainter : public vtkOpenGLRepresentationPainter
{
public:
        static TextureSlicePainter* New();
        vtkTypeMacro(TextureSlicePainter, vtkOpenGLRepresentationPainter);

        virtual void ReleaseGraphicsResources(vtkWindow *);
        void PrintSelf(ostream& os, vtkIndent indent);

        void setShaderPath(QString path);
        void SetColorAttribute(int index, float window, float level, float llr, float alpha);
        void SetVolumeBuffer(int index, GPUImageDataBufferPtr buffer);
        void SetLutBuffer(int index, GPUImageLutBufferPtr buffer);
        void releaseGraphicsResources(int index);

        static bool LoadRequiredExtensions(vtkOpenGLExtensionManager* mgr);

protected:
        TextureSlicePainter();
        virtual ~TextureSlicePainter();
        virtual void PrepareForRendering(vtkRenderer*, vtkActor*);
        void RenderInternal(vtkRenderer* renderer, vtkActor* actor, unsigned long typeflags, bool forceCompileOnly);
        bool CanRender(vtkRenderer*, vtkActor*);
        static bool LoadRequiredExtension(vtkOpenGLExtensionManager* mgr, QString id);
        void ClearGraphicsResources();

private:
        QString loadShaderFile();
        void buildProgram(QString shaderSource, vtkOpenGLRenderWindow* renderWindow);
        SingleVolumePainterHelper& safeIndex(int index);
        QString replaceShaderSourceMacros(QString shaderSource);

        bool hasLoadedExtensions;
        QString mShaderPath;

        vtkWeakPointer<vtkRenderWindow> LastContext;
        vtkSmartPointer<vtkShaderProgram2> Shader;
        std::vector<SingleVolumePainterHelper> mElement;
};

#endif //CX_VTK_OPENGL2


//---------------------------------------------------------
}//end namespace
//---------------------------------------------------------
#endif /* CXTEXTURESLICEPAINTER_H_ */