OSGDVRVolumeTexture.cpp

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//---------------------------------------------------------------------------
//  Includes
//---------------------------------------------------------------------------

#include <stdlib.h>
#include <stdio.h>

#include <OSGConfig.h>

#include "OSGDVRVolumeTexture.h"

#include <OSGImage.h>

OSG_USING_NAMESPACE

/*----------------------- constructors & destructors ----------------------*/


DVRVolumeTexture::DVRVolumeTexture(void) :
    Inherited()
{
}


DVRVolumeTexture::DVRVolumeTexture(const DVRVolumeTexture &source) :
    Inherited(source)
{
}


DVRVolumeTexture::~DVRVolumeTexture(void)
{
    if (getImage() != NullFC)
    {
        setImage(NullFC);
    }
}

/*----------------------------- class specific ----------------------------*/


void DVRVolumeTexture::initMethod (void)
{
}


void DVRVolumeTexture::changed(BitVector whichField, UInt32 origin)
{
    DVRVolumeTexturePtr thisP(*this);
  
    FDEBUG(("DVRVolumeTexture::changed - \n"));
  
    if (whichField & ImageFieldMask) 
    {
        FINFO(("DVRVolumeTexture::changed - new Image\n"));

        if(origin & ChangedOrigin::Abstract)
        {
            if(origin & ChangedOrigin::AbstrIncRefCount)
            {
                addRefCP(_sfImage.getValue());
            }
            else
            {
                ImagePtr pImage = _sfImage.getValue();
                
                _sfImage.setValue(NullFC);
                
                setImage(pImage);
            }
        }
        
        _mfHistogram.resize(256);
        
        // update histogram
        Real32 *hist   = &(_mfHistogram[0]);
        UChar8 *img    = getImage()->getData();
        Real32  maxVal = 0;
        
        for(UInt32 i = 0; i < 256; i++)
            hist[i] = 0;

        if(img == NULL) 
            return;
    
        FDEBUG(("Image: %d %d %d\n",
                getImage()->getWidth(), 
                getImage()->getHeight(), 
                getImage()->getDepth()));

        // need to fix this for compressed textures!
        for(Int32 j = 0;j < getImage()->getSize();j++)
        {
//          cerr << j << ": " << (int) img[j] << std::endl ;
            hist[img[j]]++;
        }
        
        for(UInt32 k = 0; k < 256; k++)
            maxVal = (hist[k] > maxVal) ? hist[k] : maxVal;
        
        _sfMaxVal.setValue(maxVal);

        // update sliceThickness
        const std::string * sTatt = 
            getImage()->findAttachmentField("SliceThickness");

        if(sTatt) 
        {
            Real64 sT[3];

            sscanf(sTatt->c_str(), "%lf %lf %lf", &sT[0], &sT[1], &sT[2]);

            _sfSliceThickness.setValue(
                Vec3f(Real32(sT[0]), 
                      Real32(sT[1]), 
                      Real32(sT[2])));
        } 
        else 
        {
            SWARNING << "DVRVolumeTexture::changed - No SliceThickness found"
                     << std::endl;
        }
        
        // update resolution
        const std::string * resAtt = 
            getImage()->findAttachmentField("Resolution");

        if (resAtt) 
        {
            Real64 sT[3];

            sscanf(resAtt->c_str(), "%lf %lf %lf", &sT[0], &sT[1], &sT[2]);

            _sfResolution.setValue(
                Vec3f(Real32(sT[0]), 
                      Real32(sT[1]), 
                      Real32(sT[2])));
        } 
        else 
        {
            _sfResolution.setValue(Vec3f(getImage()->getWidth (), 
                                         getImage()->getHeight(), 
                                         getImage()->getDepth ()));
        }

        whichField &= ~FileNameFieldMask;
    }
    
    if (whichField & FileNameFieldMask)
    {
        FINFO(("DVRVolumeTexture::changed - new fileName\n"));
        
        ImagePtr datImage = Image::create();
    
        datImage->read(_sfFileName.getValue().c_str());

        datImage->dump();

        beginEditCP(thisP, ImageFieldMask);
        {
            setImage(datImage);
        }
        endEditCP  (thisP, ImageFieldMask);
    }

    Inherited::changed(whichField, origin);
}


void DVRVolumeTexture::dump(      UInt32    , 
                            const BitVector ) const
{
    SLOG << "Dump DVRVolumeTexture NI" << std::endl;
}


/*-------------------------------------------------------------------------*/
/*                              cvs id's                                   */

#ifdef __sgi
#pragma set woff 1174
#endif

#ifdef OSG_LINUX_ICC
#pragma warning( disable : 177 )
#endif

namespace
{
    static char cvsid_cpp[] = "@(#)$Id: $";
    static char cvsid_hpp[] = OSGDVRVOLUMETEXTURE_HEADER_CVSID;
    static char cvsid_inl[] = OSGDVRVOLUMETEXTURE_INLINE_CVSID;
}

---