cxImageTFData.cpp

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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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/*
 * sscImageTFData.cpp
 *
 *  Created on: Mar 15, 2011
 *      Author: christiana
 */

#include "cxImageTFData.h"
#include <iostream>
#include <QDomDocument>
#include <QStringList>
#include <vtkColorTransferFunction.h>
#include <vtkPiecewiseFunction.h>
#include <vtkLookupTable.h>
#include <vtkImageData.h>

#include "cxVector3D.h"
#include "cxImageTF3D.h"

#include "cxTypeConversions.h"

namespace cx
{

ImageTFData::ImageTFData()
{
}

ImageTFData::~ImageTFData()
{
}

void ImageTFData::deepCopy(ImageTFData* source)
{
        mOpacityMap = source->mOpacityMap;
        mColorMap = source->mColorMap;
}

void ImageTFData::addXml(QDomNode dataNode)
{
        QDomDocument doc = dataNode.ownerDocument();

        QDomElement alphaNode = doc.createElement("alpha");
        // Use QStringList to put all points in the same string instead of storing
        // the points as separate nodes.
        QStringList pointStringList;
        // Add alpha points
        for (IntIntMap::iterator opPoint = mOpacityMap.begin(); opPoint != mOpacityMap.end(); ++opPoint)
                pointStringList.append(QString("%1=%2").arg(opPoint->first). arg(opPoint->second));
        alphaNode.appendChild(doc.createTextNode(pointStringList.join(" ")));

        pointStringList.clear();
        QDomElement colorNode = doc.createElement("color");
        // Add color points
        for (ColorMap::iterator colorPoint = mColorMap.begin(); colorPoint != mColorMap.end(); ++colorPoint)
                pointStringList.append(QString("%1=%2/%3/%4").arg(colorPoint->first). arg(colorPoint->second.red()). arg(
                        colorPoint->second.green()). arg(colorPoint->second.blue()));
        colorNode.appendChild(doc.createTextNode(pointStringList.join(" ")));

        dataNode.appendChild(alphaNode);
        dataNode.appendChild(colorNode);

        QDomElement elem = dataNode.toElement();
}

void ImageTFData::parseXml(QDomNode dataNode)
{
        if (dataNode.isNull())
                return;

        QDomNode alphaNode = dataNode.namedItem("alpha");
        // Read alpha node if it exists
        if (!alphaNode.isNull() && !alphaNode.toElement().text().isEmpty())
        {
                QString alphaString = alphaNode.toElement().text();
                mOpacityMap.clear();
                QStringList alphaStringList = alphaString.split(" ", QString::SkipEmptyParts);
                for (int i = 0; i < alphaStringList.size(); i++)
                {
                        QStringList pointStringList = alphaStringList[i].split("=");
                        if (pointStringList.size() < 2)
                                continue;
                        addAlphaPoint(pointStringList[0].toInt(), pointStringList[1].toInt());
                }
        }
        else
        {
                std::cout << "Warning: ImageTF3D::parseXml() found no alpha transferfunction";
                std::cout << std::endl;
        }

        QDomNode colorNode = dataNode.namedItem("color");
        // Read color node if it exists
        if (!colorNode.isNull() && !colorNode.toElement().text().isEmpty())
        {
                mColorMap.clear();
                QStringList colorStringList = colorNode.toElement().text().split(" ", QString::SkipEmptyParts);
                for (int i = 0; i < colorStringList.size(); i++)
                {
                        QStringList pointStringList = colorStringList[i].split("=");
                        QStringList valueStringList = pointStringList[1].split("/");
                        addColorPoint(pointStringList[0].toInt(), QColor(valueStringList[0].toInt(), valueStringList[1].toInt(),
                                valueStringList[2].toInt()));
                }
        }
        else
        {
                std::cout << "Warning: ImageTF3D::parseXml() found no color transferfunction";
                std::cout << std::endl;
        }

        this->internalsHaveChanged();
}

void ImageTFData::unsignedCT(bool onLoad)
{
//      //Signed after all. Don't do anyting
//      if (this->getScalarMin() < 0)
//              return;

        int modify = -1024;
        if(onLoad)
                modify = 1024;

//      std::cout << "unsignedCT shift " << modify << std::endl;
        this->shift(modify);
}

void ImageTFData::shift(int val)
{
        this->shiftOpacity(val);
        this->shiftColor(val, 0, 1);

        this->internalsHaveChanged();
}

void ImageTFData::shiftColor(int shift, double center, double scale)
{
        ColorMap newColorMap;
        for (ColorMap::iterator it = mColorMap.begin(); it != mColorMap.end(); ++it)
        {
                double newVal = (it->first-center)*scale+center + shift;
                int roundedVal = floor(newVal + 0.5);
                newColorMap[roundedVal] = it->second;
        }
        mColorMap = newColorMap;
}

void ImageTFData::shiftOpacity(int shift)
{
        IntIntMap newOpacipyMap;
        for (IntIntMap::iterator it = mOpacityMap.begin(); it != mOpacityMap.end(); ++it)
        {
                newOpacipyMap[it->first + shift] = it->second;
        }
        mOpacityMap = newOpacipyMap;
}

void ImageTFData::setLLR(double val)
{
        double old = this->getLLR();
        if (similar(old, val))
                return;

        this->shiftOpacity(val-old);
        this->internalsHaveChanged();
}

double ImageTFData::getLLR() const
{
        if (mOpacityMap.empty())
                return 0;

        for (IntIntMap::const_iterator it = mOpacityMap.begin(); it != mOpacityMap.end(); ++it)
        {
                if (!similar(it->second, 0.0))
                        return it->first;
        }
        return mOpacityMap.begin()->first;
}

void ImageTFData::setAlpha(double val)
{
        double old = this->getAlpha();
        if (similar(old, val))
                return;

        if (similar(old, 0.0))
        {
                // degenerate case: we have lost all info, simpl add input val to all but the first entry
                for (IntIntMap::iterator it = mOpacityMap.begin(); it != mOpacityMap.end(); ++it)
                {
                        if (it==mOpacityMap.begin() && mOpacityMap.size()>1)
                                continue; // heuristic: assume first entry should stay at zero
                        it->second += val*255;
                }
        }
        else
        {
                double scale = val/old;
                for (IntIntMap::iterator it = mOpacityMap.begin(); it != mOpacityMap.end(); ++it)
                {
                        it->second *= scale;
                }
        }

        this->internalsHaveChanged();
}

double ImageTFData::getAlpha() const
{
        double amax = 0;
        for (IntIntMap::const_iterator it = mOpacityMap.begin(); it != mOpacityMap.end(); ++it)
        {
                amax = std::max<double>(it->second, amax);
        }
        return amax/255;
}

void ImageTFData::setWindow(double val)
{
        double old = this->getWindow();
        val = std::max(1.0, val);

        if (similar(old, val))
                return;

        double scale = val/old;
        this->shiftColor(0, this->getLevel(), scale);

        this->internalsHaveChanged();
}

double ImageTFData::getWindow() const
{
        if (mColorMap.empty())
                return 0;
        return mColorMap.rbegin()->first - mColorMap.begin()->first;
//      return mWindow;
}

void ImageTFData::setLevel(double val)
{
        double old = this->getLevel();
        if (similar(old, val))
                return;
        double shift = val-old;

        this->shiftColor(shift, 0.0, 1.0);

//      mLevel = val;
        this->internalsHaveChanged();
}

double ImageTFData::getLevel() const
{
        if (mColorMap.empty())
                return 0;
        int a = mColorMap.begin()->first;
        int b = mColorMap.rbegin()->first;
        return a + (b-a)/2;
//      return mLevel;
}

IntIntMap ImageTFData::getOpacityMap()
{
        return mOpacityMap;
}
ColorMap ImageTFData::getColorMap()
{
        return mColorMap;
}
void ImageTFData::addAlphaPoint(int alphaPosition, int alphaValue)
{
        //mOpacityMapPtr->insert(std::pair<int, int>(alphaPosition, alphaValue));
        mOpacityMap[alphaPosition] = alphaValue;
        this->internalsHaveChanged();
}
void ImageTFData::removeAlphaPoint(int alphaPosition)
{
        mOpacityMap.erase(alphaPosition);
        this->internalsHaveChanged();
}
void ImageTFData::moveAlphaPoint(int oldpos, int newpos, int alphaValue)
{
        mOpacityMap.erase(oldpos);
        mOpacityMap[newpos] = alphaValue;
        this->internalsHaveChanged();
}
void ImageTFData::addColorPoint(int colorPosition, QColor colorValue)
{
        mColorMap[colorPosition] = colorValue;
        //mColorMapPtr->insert(std::pair<int, QColor>(colorPosition, colorValue));
        this->internalsHaveChanged();
}
void ImageTFData::removeColorPoint(int colorPosition)
{
        mColorMap.erase(colorPosition);
        this->internalsHaveChanged();
}

void ImageTFData::moveColorPoint(int oldpos, int newpos, QColor colorValue)
{
        mColorMap.erase(oldpos);
        mColorMap[newpos] = colorValue;
        this->internalsHaveChanged();
}

void ImageTFData::resetAlpha(IntIntMap val)
{
        mOpacityMap = val;
        this->internalsHaveChanged();
}

void ImageTFData::resetColor(ColorMap val)
{
        mColorMap = val;
        this->internalsHaveChanged();
}

vtkColorTransferFunctionPtr ImageTFData::generateColorTF() const
{
        vtkColorTransferFunctionPtr tf = vtkColorTransferFunctionPtr::New();
        this->fillColorTFFromMap(tf);
        return tf;
}

vtkPiecewiseFunctionPtr ImageTFData::generateOpacityTF() const
{
        vtkPiecewiseFunctionPtr tf = vtkPiecewiseFunctionPtr::New();
        this->fillOpacityTFFromMap(tf);
        return tf;
}

void ImageTFData::fillColorTFFromMap(vtkColorTransferFunctionPtr tf) const
{
        tf->SetColorSpaceToRGB();
        tf->RemoveAllPoints();
        for (ColorMap::const_iterator iter = mColorMap.begin(); iter != mColorMap.end(); ++iter)
        {
                QColor c = iter->second;
                tf->AddRGBPoint(iter->first, c.redF(), c.greenF(), c.blueF());
        }
}

void ImageTFData::fillOpacityTFFromMap(vtkPiecewiseFunctionPtr tf) const
{
        tf->RemoveAllPoints();
        for (IntIntMap::const_iterator iter = mOpacityMap.begin(); iter != mOpacityMap.end(); ++iter)
                tf->AddPoint(iter->first, iter->second / 255.0);
//      tf->Update();
}

}