cxSharedOpenGLContext.h

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
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#ifndef CXSHAREDOPENGLCONTEXT_H
#define CXSHAREDOPENGLCONTEXT_H

#ifdef WIN32
#include <windows.h>
#endif

#include <GL/glew.h>

#include <boost/shared_ptr.hpp>
#include "vtkForwardDeclarations.h"

#include "cxResourceVisualizationExport.h"
#include "cxForwardDeclarations.h"
#include "vtkForwardDeclarations.h"

namespace cx
{

typedef boost::shared_ptr<class SharedOpenGLContext> SharedOpenGLContextPtr;

class cxResourceVisualization_EXPORT SharedOpenGLContext
{
public:
        static bool isValid(vtkOpenGLRenderWindowPtr opengl_renderwindow, bool print=false);

        SharedOpenGLContext(vtkOpenGLRenderWindowPtr sharedContext);
        ~SharedOpenGLContext();

        bool makeCurrent() const;
        int getNumberOfTexturesInUse() const;

        //Image textures are per image
        bool uploadImage(ImagePtr image);
        bool hasUploadedImage(QString image_uid) const;
        vtkTextureObjectPtr get3DTextureForImage(QString image_uid) const;
        bool delete3DTextureForImage(QString image_uid);

        //LUT textures are per image
        bool uploadLUT(QString imageUid, vtkUnsignedCharArrayPtr lutTable);
        bool hasUploadedLUT(QString image_uid) const;
        vtkTextureObjectPtr get1DTextureForLUT(QString image_uid) const;
        bool delete1DTextureForLUT(QString image_uid);

        //Texture coordinates are per view
        bool upload3DTextureCoordinates(QString uid, vtkFloatArrayPtr texture_coordinates);
        bool hasUploadedTextureCoordinates(QString uid) const;
        vtkOpenGLBufferObjectPtr getTextureCoordinates(QString uid) const;
        vtkImageDataPtr downloadImageFromTextureBuffer(QString image_uid);//For testing


private:
        bool create1DTextureObject(vtkTextureObjectPtr texture_object, unsigned int width, int dataType, int numComps, void *data, vtkOpenGLRenderWindowPtr opengl_renderwindow) const;
        bool create3DTextureObject(vtkTextureObjectPtr texture_object, unsigned int width, unsigned int height, unsigned int depth, int dataType, int numComps, void *data, vtkOpenGLRenderWindowPtr opengl_renderwindow) const;
        vtkOpenGLBufferObjectPtr allocateAndUploadArrayBuffer(QString uid, int my_numberOfTextureCoordinates, int numberOfComponentsPerTexture, const float *texture_data) const;

        std::map<QString, std::pair<vtkTextureObjectPtr, unsigned long> > m1DTextureObjects;
        std::map<QString, std::pair<vtkTextureObjectPtr, unsigned long> > m3DTextureObjects;

        std::map<QString, vtkOpenGLBufferObjectPtr > mTextureCoordinateBuffers;

        vtkOpenGLRenderWindowPtr mContext;

        SharedOpenGLContext(); //not implemented
        bool useLinearInterpolation() const;
};

}//cx

#endif // CXSHAREDOPENGLCONTEXT_H