cxTexture3DSlicerProxy.cpp

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/*=========================================================================
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/*
 * sscTexture3DSlicerProxyImpl.cpp
 *
 *  Created on: Oct 13, 2011
 *      Author: christiana
 */

#include "cxTexture3DSlicerProxy.h"

#include <vtkRenderer.h>
#include <vtkFloatArray.h>
#include <vtkPlaneSource.h>
#include <vtkPointData.h>
#include <vtkTriangleFilter.h>
#include <vtkStripper.h>
#include <vtkImageData.h>
#include <vtkLookupTable.h>
#include <vtkOpenGLRenderWindow.h>

#include "cxImage.h"
#include "cxView.h"
#include "cxImageLUT2D.h"
#include "cxSliceProxy.h"
#include "cxTypeConversions.h"
#include "cxGPUImageBuffer.h"
#include "cxReporter.h"
#include "cxConfig.h"


#include "cxTextureSlicePainter.h"
#ifndef CX_VTK_OPENGL2
#include <vtkPainterPolyDataMapper.h>
#endif

//---------------------------------------------------------
namespace cx
{
//---------------------------------------------------------

//#ifdef WIN32
//#ifdef CX_VTK_OPENGL2
#if defined(CX_VTK_OPENGL2) || defined(WIN32)

Texture3DSlicerProxyPtr Texture3DSlicerProxy::New()
{
        return Texture3DSlicerProxyPtr(new Texture3DSlicerProxy());
}

bool Texture3DSlicerProxy::isSupported(vtkRenderWindowPtr window)
{
        return false;
}

#else

bool Texture3DSlicerProxy::isSupported(vtkRenderWindowPtr window)
{
        vtkOpenGLRenderWindow *context = vtkOpenGLRenderWindow::SafeDownCast(window);
        bool success =  context && TextureSlicePainter::LoadRequiredExtensions(context->GetExtensionManager());
        return success;
}

Texture3DSlicerProxyPtr Texture3DSlicerProxy::New()
{
        return Texture3DSlicerProxyImpl::New();
}


void Texture3DSlicerProxyImpl::setTargetSpaceToR()
{
        mTargetSpaceIsR = true;
}

Texture3DSlicerProxyImpl::Texture3DSlicerProxyImpl()
{
        mTargetSpaceIsR = false;
        mActor = vtkActorPtr::New();
        mPainter = TextureSlicePainterPtr::New();
        mPainterPolyDatamapper = vtkPainterPolyDataMapperPtr::New();

        mPlaneSource = vtkPlaneSourcePtr::New();

        vtkTriangleFilterPtr triangleFilter = vtkTriangleFilterPtr::New(); //create triangle polygons from input polygons
        triangleFilter->SetInputConnection(mPlaneSource->GetOutputPort()); //in this case a Planesource

        vtkStripperPtr stripper = vtkStripperPtr::New();
        stripper->SetInputConnection(triangleFilter->GetOutputPort());
//      stripper->Update();
        mPolyDataAlgorithm = stripper;
        mPolyDataAlgorithm->Update();

        mPolyData = mPolyDataAlgorithm->GetOutput();
        mPolyData->GetPointData()->SetNormals(NULL);

        mPainter->SetDelegatePainter(mPainterPolyDatamapper->GetPainter());
        mPainterPolyDatamapper->SetPainter(mPainter);
        mPainterPolyDatamapper->SetInputData(mPolyData);
        mActor->SetMapper(mPainterPolyDatamapper);
}

Texture3DSlicerProxyImpl::~Texture3DSlicerProxyImpl()
{
        mImages.clear();
}

Texture3DSlicerProxyPtr Texture3DSlicerProxyImpl::New()
{
        return Texture3DSlicerProxyPtr(new Texture3DSlicerProxyImpl());
}

vtkActorPtr Texture3DSlicerProxyImpl::getActor()
{
        return mActor;
}

void Texture3DSlicerProxyImpl::setShaderPath(QString shaderFile)
{
        mPainter->setShaderPath(shaderFile);
}

//void Texture3DSlicerProxyImpl::viewChanged()
//{
//      if (!mView)
//              return;
//      if (!mView->getZoomFactor() < 0)
//              return; // ignore if zoom is invalid
//      this->setViewportData(mView->get_vpMs(), mView->getViewport());
//}

void Texture3DSlicerProxyImpl::setViewportData(const Transform3D& vpMs, const DoubleBoundingBox3D& vp)
{
        if (!mTargetSpaceIsR)
        {
                mBB_s = transform(vpMs.inv(), vp);
        }

        this->resetGeometryPlane();
}

void Texture3DSlicerProxyImpl::resetGeometryPlane()
{
        if (mTargetSpaceIsR)
        {
                // use largest bb from all volume box vertices projected onto s:
                Transform3D rMs = mSliceProxy->get_sMr().inv();
                DoubleBoundingBox3D bb_d = mImages[0]->boundingBox();
                Transform3D sMd = rMs.inv()*mImages[0]->get_rMd();
                std::vector<Vector3D> pp_s;
                for (unsigned x=0; x<2; ++x)
                        for (unsigned y=0; y<2; ++y)
                                for (unsigned z=0; z<2; ++z)
                                        pp_s.push_back(sMd.coord(bb_d.corner(x,y,x)));

                mBB_s = DoubleBoundingBox3D::fromCloud(pp_s);
                mBB_s[4] = 0;
                mBB_s[5] = 0;
//              double extent = 100;
//              mBB_s = DoubleBoundingBox3D(-extent, extent, -extent, extent, 0, 0);
        }

        Vector3D origin(mBB_s[0], mBB_s[2], 0);
        Vector3D p1(mBB_s[1], mBB_s[2], 0);
        Vector3D p2(mBB_s[0], mBB_s[3], 0);

        if (mTargetSpaceIsR)
        {
                Transform3D rMs = mSliceProxy->get_sMr().inv();
                p1 = rMs.coord(p1);
                p2 = rMs.coord(p2);
                origin = rMs.coord(origin);
        }

        if (similar(mBB_s.range()[0] * mBB_s.range()[1], 0.0))
        {
//              std::cout << "zero-size bounding box in texture slicer- ignoring" << std::endl;
                return;
        }

        createGeometryPlane(p1, p2, origin);
}

void Texture3DSlicerProxyImpl::createGeometryPlane( Vector3D point1_s,  Vector3D point2_s, Vector3D origin_s )
{
//  std::cout << "createGeometryPlane " << point1_s << ", " << point2_s << ", " << origin_s << std::endl;
        mPlaneSource->SetPoint1( point1_s.begin() );
        mPlaneSource->SetPoint2( point2_s.begin() );
        mPlaneSource->SetOrigin( origin_s.begin() );
//  std::cout << "createGeometryPlane update begin" << std::endl;
        mPolyDataAlgorithm->Update();
//      mPolyData->Update();
//  std::cout << "createGeometryPlane update end" << std::endl;
        // each stripper->update() resets the contents of polydata, thus we must reinsert the data here.
        for (unsigned i=0; i<mImages.size(); ++i)
        {
                updateCoordinates(i);
        }
}

void Texture3DSlicerProxyImpl::setImages(std::vector<ImagePtr> images_raw)
{
        std::vector<ImagePtr> images = processImages(images_raw);

        for (unsigned i = 0; i < mImages.size(); ++i)
        {
                disconnect(mImages[i].get(), SIGNAL(transformChanged()), this, SLOT(transformChangedSlot()));
                disconnect(mImages[i].get(), SIGNAL(transferFunctionsChanged()), this, SLOT(updateColorAttributeSlot()));
                disconnect(mImages[i].get(), SIGNAL(vtkImageDataChanged()), this, SLOT(imageChanged()));
        }

        mImages = images;

        for (unsigned i = 0; i < mImages .size(); ++i)
        {
                vtkImageDataPtr inputImage = mImages[i]->getBaseVtkImageData();

                GPUImageDataBufferPtr dataBuffer = GPUImageBufferRepository::getInstance()->getGPUImageDataBuffer(
                        inputImage);

                mPainter->SetVolumeBuffer(i, dataBuffer);

                connect(mImages[i].get(), SIGNAL(transformChanged()), this, SLOT(transformChangedSlot()));
                connect(mImages[i].get(), SIGNAL(transferFunctionsChanged()), this, SLOT(updateColorAttributeSlot()));
                connect(mImages[i].get(), SIGNAL(vtkImageDataChanged()), this, SLOT(imageChanged()));
                this->updateCoordinates(i);
        }
        this->updateColorAttributeSlot();

        for (unsigned i = 0; i < mImages.size(); ++i)
        {
                mPainterPolyDatamapper->MapDataArrayToMultiTextureAttribute(2 * i,
                        cstring_cast(this->getTCoordName(i)),
                        vtkDataObject::FIELD_ASSOCIATION_POINTS);
        }
}

std::vector<ImagePtr> Texture3DSlicerProxyImpl::processImages(std::vector<ImagePtr> images_raw)
{
        if(images_raw.size() > mMaxImages)
        {
                QString errorText = QString("Texture3DSlicerProxyImpl: GPU multislicer can't handle more than %1 images. Additional images are not shown.").arg(mMaxImages);
                reportError(errorText);
                images_raw.resize(mMaxImages);
        }

        std::vector<ImagePtr> images(images_raw.size());
        for (unsigned i=0; i<images.size(); ++i)
                images[i] = images_raw[i]->getUnsigned(images_raw[i]);

        return images;
}


void Texture3DSlicerProxyImpl::setSliceProxy(SliceProxyPtr slicer)
{
        if (mSliceProxy)
                disconnect(mSliceProxy.get(), SIGNAL(transformChanged(Transform3D)), this, SLOT(transformChangedSlot()));
        mSliceProxy = slicer;
        if (mSliceProxy)
        {
                connect(mSliceProxy.get(), SIGNAL(transformChanged(Transform3D)), this, SLOT(transformChangedSlot()));
                for (unsigned i=0; i < mImages.size(); ++i)
                {
                        updateCoordinates(i);
                }
        }
}

QString Texture3DSlicerProxyImpl::getTCoordName(int index)
{
        return  "texture"+qstring_cast(index);
}

void Texture3DSlicerProxyImpl::updateCoordinates(int index)
{
        if (!mPolyData || !mSliceProxy)
                return;

        vtkImageDataPtr volume = mImages[index]->getBaseVtkImageData();
        // create a bb describing the volume in physical (raw data) space
        Vector3D origin(volume->GetOrigin());
        Vector3D spacing(volume->GetSpacing());
        DoubleBoundingBox3D imageSize(volume->GetExtent());

        for (int i = 0; i < 3; ++i)
        {
                imageSize[2 * i] = origin[i] + spacing[i] * (imageSize[2 * i] - 0.5);
                imageSize[2 * i + 1] = origin[i] + spacing[i] * (imageSize[2 * i + 1] + 0.5);
        }

        // identity bb
        DoubleBoundingBox3D textureSpace(0.0, 1.0, 0.0, 1.0, 0.0, 1.0);

        // create transform from slice space to raw data space
        Transform3D iMs = mImages[index]->get_rMd().inv() * mSliceProxy->get_sMr().inv();
        // create transform from image space to texture normalized space
        Transform3D nMi = createTransformNormalize(imageSize, textureSpace);
        // total transform from slice space to texture space
        Transform3D nMs = nMi * iMs;
        // transform the viewport to texture coordinates (must use coords since bb3D doesnt handle non-axis-aligned transforms)
        std::vector<Vector3D> plane(4);
        plane[0] = mBB_s.corner(0, 0, 0);
        plane[1] = mBB_s.corner(1, 0, 0);
        plane[2] = mBB_s.corner(0, 1, 0);
        plane[3] = mBB_s.corner(1, 1, 0);

        for (unsigned i = 0; i < plane.size(); ++i)
        {
                plane[i] = nMs.coord(plane[i]);
        }

        vtkFloatArrayPtr TCoords = vtkFloatArray::SafeDownCast(mPolyData->GetPointData()->GetArray(
                cstring_cast(getTCoordName(index))));

        if (!TCoords) // create the TCoords
        {
                TCoords = vtkFloatArrayPtr::New();
                TCoords->SetNumberOfComponents(3);
                TCoords->Allocate(4 * 3);
                TCoords->InsertNextTuple3(0.0, 0.0, 0.0);
                TCoords->InsertNextTuple3(0.0, 0.0, 0.0);
                TCoords->InsertNextTuple3(0.0, 0.0, 0.0);
                TCoords->InsertNextTuple3(0.0, 0.0, 0.0);
                TCoords->SetName(cstring_cast(getTCoordName(index)));
                mPolyData->GetPointData()->AddArray(TCoords);
        }

        for (unsigned i = 0; i < plane.size(); ++i)
        {
                TCoords->SetTuple3(i, plane[i][0], plane[i][1], plane[i][2]);
        }

        mPolyData->Modified();
}

void Texture3DSlicerProxyImpl::updateColorAttributeSlot()
{
        for (unsigned i = 0; i < mImages.size(); ++i)
        {
                vtkImageDataPtr inputImage = mImages[i]->getBaseVtkImageData() ;

                vtkLookupTablePtr lut = mImages[i]->getLookupTable2D()->getOutputLookupTable();
                lut->GetTable()->Modified();
                GPUImageLutBufferPtr lutBuffer = GPUImageBufferRepository::getInstance()->getGPUImageLutBuffer(lut->GetTable());

                // no lut indicates to the fragment shader that RGBA should be used
                if (inputImage->GetNumberOfScalarComponents()==1)
                {
                        mPainter->SetLutBuffer(i, lutBuffer);
                }

                int scalarTypeMax = (int)inputImage->GetScalarTypeMax();
                double imin = lut->GetRange()[0];
                double imax = lut->GetRange()[1];

                float window = (float) (imax-imin) / scalarTypeMax;
                float llr = (float) mImages[i]->getLookupTable2D()->getLLR() / scalarTypeMax;
                float level = (float) imin/scalarTypeMax + window/2;
                float alpha = (float) mImages[i]->getLookupTable2D()->getAlpha();

                mPainter->SetColorAttribute(i, window, level, llr, alpha);
        }
        mActor->Modified();
}

void Texture3DSlicerProxyImpl::transformChangedSlot()
{
        if (mTargetSpaceIsR)
                this->resetGeometryPlane();
        this->update();
}

void Texture3DSlicerProxyImpl::imageChanged()
{
        mActor->Modified();

        for (unsigned i = 0; i < mImages .size(); ++i)
        {
                vtkImageDataPtr inputImage = mImages[i]->getBaseVtkImageData();//

                GPUImageDataBufferPtr dataBuffer = GPUImageBufferRepository::getInstance()->getGPUImageDataBuffer(
                        inputImage);

                mPainter->SetVolumeBuffer(i, dataBuffer);
        }
}

void Texture3DSlicerProxyImpl::update()
{
        for (unsigned i=0; i<mImages.size(); ++i)
        {
                updateCoordinates(i);
        }
}

//#endif // WIN32
#endif //CX_VTK_OPENGL2


//---------------------------------------------------------
}//end namespace
//---------------------------------------------------------