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// Authors:
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//M*/

#include "precomp.hpp"

namespace cv { namespace viz
{
    vtkStandardNewMacro(vtkCloudMatSource);

    template<typename _Tp> struct VtkDepthTraits;

    template<> struct VtkDepthTraits<float>
    {
        const static int data_type = VTK_FLOAT;
        typedef vtkFloatArray array_type;
    };

    template<> struct VtkDepthTraits<double>
    {
        const static int data_type = VTK_DOUBLE;
        typedef vtkDoubleArray array_type;
    };
}}

cv::viz::vtkCloudMatSource::vtkCloudMatSource() { SetNumberOfInputPorts(0); }
cv::viz::vtkCloudMatSource::~vtkCloudMatSource() {}

int cv::viz::vtkCloudMatSource::SetCloud(InputArray _cloud)
{
    CV_Assert(_cloud.depth() == CV_32F || _cloud.depth() == CV_64F);
    CV_Assert(_cloud.channels() == 3 || _cloud.channels() == 4);

    Mat cloud = _cloud.getMat();

    int total = _cloud.depth() == CV_32F ? filterNanCopy<float>(cloud) : filterNanCopy<double>(cloud);

    vertices = vtkSmartPointer<vtkCellArray>::New();
    vertices->Allocate(vertices->EstimateSize(1, total));
    vertices->InsertNextCell(total);
    for(int i = 0; i < total; ++i)
        vertices->InsertCellPoint(i);

    return total;
}

int cv::viz::vtkCloudMatSource::SetColorCloud(InputArray _cloud, InputArray _colors)
{
    int total = SetCloud(_cloud);

    if (_colors.empty())
        return total;

    CV_Assert(_colors.depth() == CV_8U && _colors.channels() <= 4 && _colors.channels() != 2);
    CV_Assert(_colors.size() == _cloud.size());

    Mat cloud = _cloud.getMat();
    Mat colors = _colors.getMat();

    if (cloud.depth() == CV_32F)
        filterNanColorsCopy<float>(colors, cloud, total);
    else if (cloud.depth() == CV_64F)
        filterNanColorsCopy<double>(colors, cloud, total);

    return total;
}

int cv::viz::vtkCloudMatSource::SetColorCloudNormals(InputArray _cloud, InputArray _colors, InputArray _normals)
{
    int total = SetColorCloud(_cloud, _colors);

    if (_normals.empty())
        return total;

    CV_Assert(_normals.depth() == CV_32F || _normals.depth() == CV_64F);
    CV_Assert(_normals.channels() == 3 || _normals.channels() == 4);
    CV_Assert(_normals.size() == _cloud.size());

    Mat c = _cloud.getMat();
    Mat n = _normals.getMat();

    if (n.depth() == CV_32F && c.depth() == CV_32F)
        filterNanNormalsCopy<float, float>(n, c, total);
    else if (n.depth() == CV_32F && c.depth() == CV_64F)
        filterNanNormalsCopy<float, double>(n, c, total);
    else if (n.depth() == CV_64F && c.depth() == CV_32F)
        filterNanNormalsCopy<double, float>(n, c, total);
    else if (n.depth() == CV_64F && c.depth() == CV_64F)
        filterNanNormalsCopy<double, double>(n, c, total);
    else
        CV_Assert(!"Unsupported normals/cloud type");

    return total;
}

int cv::viz::vtkCloudMatSource::SetColorCloudNormalsTCoords(InputArray _cloud, InputArray _colors, InputArray _normals, InputArray _tcoords)
{
    int total = SetColorCloudNormals(_cloud, _colors, _normals);

    if (_tcoords.empty())
        return total;

    CV_Assert(_tcoords.depth() == CV_32F || _tcoords.depth() == CV_64F);
    CV_Assert(_tcoords.channels() == 2 && _tcoords.size() == _cloud.size());

    Mat cl = _cloud.getMat();
    Mat tc = _tcoords.getMat();

    if (tc.depth() == CV_32F && cl.depth() == CV_32F)
        filterNanTCoordsCopy<float, float>(tc, cl, total);
    else if (tc.depth() == CV_32F && cl.depth() == CV_64F)
        filterNanTCoordsCopy<float, double>(tc, cl, total);
    else if (tc.depth() == CV_64F && cl.depth() == CV_32F)
        filterNanTCoordsCopy<double, float>(tc, cl, total);
    else if (tc.depth() == CV_64F && cl.depth() == CV_64F)
        filterNanTCoordsCopy<double, double>(tc, cl, total);
    else
        CV_Assert(!"Unsupported tcoords/cloud type");

    return total;
}

int cv::viz::vtkCloudMatSource::RequestData(vtkInformation *vtkNotUsed(request), vtkInformationVector **vtkNotUsed(inputVector), vtkInformationVector *outputVector)
{
    vtkInformation *outInfo = outputVector->GetInformationObject(0);
    vtkPolyData *output = vtkPolyData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));

    output->SetPoints(points);
    output->SetVerts(vertices);
    if (scalars)
        output->GetPointData()->SetScalars(scalars);

    if (normals)
        output->GetPointData()->SetNormals(normals);

    if (tcoords)
        output->GetPointData()->SetTCoords(tcoords);

    return 1;
}

template<typename _Tp>
int cv::viz::vtkCloudMatSource::filterNanCopy(const Mat& cloud)
{
    CV_DbgAssert(DataType<_Tp>::depth == cloud.depth());
    points = vtkSmartPointer<vtkPoints>::New();
    points->SetDataType(VtkDepthTraits<_Tp>::data_type);
    points->Allocate((vtkIdType)cloud.total());
    points->SetNumberOfPoints((vtkIdType)cloud.total());

    int s_chs = cloud.channels();
    int total = 0;
    for (int y = 0; y < cloud.rows; ++y)
    {
        const _Tp* srow = cloud.ptr<_Tp>(y);
        const _Tp* send = srow + cloud.cols * s_chs;

        for (; srow != send; srow += s_chs)
            if (!isNan(srow))
                points->SetPoint(total++, srow);
    }
    points->SetNumberOfPoints(total);
    points->Squeeze();
    return total;
}

template<typename _Msk>
void cv::viz::vtkCloudMatSource::filterNanColorsCopy(const Mat& cloud_colors, const Mat& mask, int total)
{
    Vec3b* array = new Vec3b[total];
    Vec3b* pos = array;

    int s_chs = cloud_colors.channels();
    int m_chs = mask.channels();
    for (int y = 0; y < cloud_colors.rows; ++y)
    {
        const unsigned char* srow = cloud_colors.ptr<unsigned char>(y);
        const unsigned char* send = srow + cloud_colors.cols * s_chs;
        const _Msk* mrow = mask.ptr<_Msk>(y);

        if (cloud_colors.channels() == 1)
        {
            for (; srow != send; srow += s_chs, mrow += m_chs)
                if (!isNan(mrow))
                    *pos++ = Vec3b(srow[0], srow[0], srow[0]);
        }
        else
            for (; srow != send; srow += s_chs, mrow += m_chs)
                if (!isNan(mrow))
                    *pos++ = Vec3b(srow[2], srow[1], srow[0]);

    }

    scalars = vtkSmartPointer<vtkUnsignedCharArray>::New();
    scalars->SetName("Colors");
    scalars->SetNumberOfComponents(3);
    scalars->SetNumberOfTuples(total);
    scalars->SetArray(array->val, total * 3, 0);
}

template<typename _Tn, typename _Msk>
void cv::viz::vtkCloudMatSource::filterNanNormalsCopy(const Mat& cloud_normals, const Mat& mask, int total)
{
    normals = vtkSmartPointer< typename VtkDepthTraits<_Tn>::array_type >::New();
    normals->SetName("Normals");
    normals->SetNumberOfComponents(3);
    normals->SetNumberOfTuples(total);

    int s_chs = cloud_normals.channels();
    int m_chs = mask.channels();

    int pos = 0;
    for (int y = 0; y < cloud_normals.rows; ++y)
    {
        const _Tn* srow = cloud_normals.ptr<_Tn>(y);
        const _Tn* send = srow + cloud_normals.cols * s_chs;

        const _Msk* mrow = mask.ptr<_Msk>(y);

        for (; srow != send; srow += s_chs, mrow += m_chs)
            if (!isNan(mrow))
                normals->SetTuple(pos++, srow);
    }
}

template<typename _Tn, typename _Msk>
void cv::viz::vtkCloudMatSource::filterNanTCoordsCopy(const Mat& _tcoords, const Mat& mask, int total)
{
    typedef Vec<_Tn, 2> Vec2;
    tcoords = vtkSmartPointer< typename VtkDepthTraits<_Tn>::array_type >::New();
    tcoords->SetName("TextureCoordinates");
    tcoords->SetNumberOfComponents(2);
    tcoords->SetNumberOfTuples(total);

    int pos = 0;
    for (int y = 0; y < mask.rows; ++y)
    {
        const Vec2* srow = _tcoords.ptr<Vec2>(y);
        const Vec2* send = srow + _tcoords.cols;
        const _Msk* mrow = mask.ptr<_Msk>(y);

        for (; srow != send; ++srow, mrow += mask.channels())
            if (!isNan(mrow))
                tcoords->SetTuple(pos++, srow->val);
    }
}
