#include "iwa_spingradientfx.h"

#include "trop.h"

#include "tparamuiconcept.h"

#include "tspectrumparam.h"

#include "gradients.h"

#include <qpolygonf></qpolygonf>

#include <array></array>

#include <algorithm></algorithm>

//------------------------------------------------------------

Iwa_SpinGradientFx::Iwa_SpinGradientFx()

    : m_center(TPointD(0.0, 0.0))

    , m_startAngle(0.0)

    , m_endAngle(0.0)

    , m_startColor(TPixel32::Black)

    , m_endColor(TPixel32::White)

    , m_curveType(new TIntEnumParam()) {

  m_center->getX()->setMeasureName("fxLength");

  m_center->getY()->setMeasureName("fxLength");

  bindParam(this, "center", m_center);

  m_startAngle->setValueRange(-360, 720);

  m_endAngle->setValueRange(-360, 720);

  bindParam(this, "startAngle", m_startAngle);

  bindParam(this, "endAngle", m_endAngle);

  m_curveType->addItem(EaseInOut, "Ease In-Out");

  m_curveType->addItem(Linear, "Linear");

  m_curveType->addItem(EaseIn, "Ease In");

  m_curveType->addItem(EaseOut, "Ease Out");

  m_curveType->setDefaultValue(Linear);

  m_curveType->setValue(Linear);

  bindParam(this, "curveType", m_curveType);

  bindParam(this, "startColor", m_startColor);

  bindParam(this, "endColor", m_endColor);

}

//------------------------------------------------------------

bool Iwa_SpinGradientFx::doGetBBox(double frame, TRectD &bBox,

                                   const TRenderSettings &ri) {

  bBox = TConsts::infiniteRectD;

  return true;

}

//------------------------------------------------------------

namespace {

template <typename pixel="" raster,="" typename=""></typename>

void doSpinGradientT(RASTER ras, TDimensionI dim, TPointD centerPos,

                     double startAngle, double endAngle,

                     const TSpectrumT<pixel> &spectrum,</pixel>

                     GradientCurveType type) {

  auto getFactor = [&](double angle) {

    double p = angle - startAngle;

    if (p < 0) p += 2.0 * M_PI;

    double range = endAngle - startAngle;

    if (range <= 0) range += 2.0 * M_PI;

    double t;

    if (range >= p)

      t = p / range;

    else if (M_PI + range / 2.0 > p)

      t = 1.0;

    else

      t = 0.0;

    double factor;

    switch (type) {

    case Linear:

      factor = t;

      break;

    case EaseIn:

      factor = t * t;

      break;

    case EaseOut:

      factor = 1.0 - (1.0 - t) * (1.0 - t);

      break;

    case EaseInOut:

    default:

      factor = (-2 * t + 3) * (t * t);

      break;

    }

    return factor;

  };

  ras->lock();

  for (int j = 0; j < ras->getLy(); j++) {

    PIXEL *pix    = ras->pixels(j);

    PIXEL *endPix = pix + ras->getLx();

    double dy     = (double)j - centerPos.y;

    double dx     = -centerPos.x;

    while (pix < endPix) {

      double angle  = std::atan2(dy, dx);

      double factor = getFactor(angle);

      *pix++        = spectrum.getPremultipliedValue(factor);

      dx += 1.0;

    }

  }

  ras->unlock();

}

}  // namespace

//------------------------------------------------------------

void Iwa_SpinGradientFx::doCompute(TTile &tile, double frame,

                                   const TRenderSettings &ri) {

  if (!((TRaster32P)tile.getRaster()) && !((TRaster64P)tile.getRaster())) {

    throw TRopException("unsupported input pixel type");

  }

  // convert shape position to render region coordinate

  TAffine aff = ri.m_affine;

  TDimensionI dimOut(tile.getRaster()->getLx(), tile.getRaster()->getLy());

  TPointD dimOffset((float)dimOut.lx / 2.0f, (float)dimOut.ly / 2.0f);

  TPointD centerPos = aff * m_center->getValue(frame) -

                      (tile.m_pos + tile.getRaster()->getCenterD()) + dimOffset;

  std::vector<tspectrum::colorkey> colors = {</tspectrum::colorkey>

      TSpectrum::ColorKey(0, m_startColor->getValue(frame)),

      TSpectrum::ColorKey(1, m_endColor->getValue(frame))};

  TSpectrumParamP m_colors = TSpectrumParamP(colors);

  auto conv2RadianAndClamp = [](double angle) {

    double ret = angle * M_PI / 180.0;

    while (ret < -M_PI) {

      ret += 2.0 * M_PI;

    }

    while (ret >= M_PI) {

      ret -= 2.0 * M_PI;

    }

    return ret;

  };

  double startAngle = conv2RadianAndClamp(m_startAngle->getValue(frame));

  double endAngle   = conv2RadianAndClamp(m_endAngle->getValue(frame));

  tile.getRaster()->clear();

  TRaster32P outRas32 = (TRaster32P)tile.getRaster();

  TRaster64P outRas64 = (TRaster64P)tile.getRaster();

  if (outRas32)

    doSpinGradientT<traster32p, tpixel32="">(</traster32p,>

        outRas32, dimOut, centerPos, startAngle, endAngle,

        m_colors->getValue(frame), (GradientCurveType)m_curveType->getValue());

  else if (outRas64)

    doSpinGradientT<traster64p, tpixel64="">(</traster64p,>

        outRas64, dimOut, centerPos, startAngle, endAngle,

        m_colors->getValue64(frame),

        (GradientCurveType)m_curveType->getValue());

}

//------------------------------------------------------------

void Iwa_SpinGradientFx::getParamUIs(TParamUIConcept *&concepts, int &length) {

  concepts = new TParamUIConcept[length = 2];

  concepts[0].m_type  = TParamUIConcept::ANGLE_2;

  concepts[0].m_label = "Angle";

  concepts[0].m_params.push_back(m_startAngle);

  concepts[0].m_params.push_back(m_endAngle);

  concepts[0].m_params.push_back(m_center);

  concepts[1].m_type  = TParamUIConcept::POINT;

  concepts[1].m_label = "Center";

  concepts[1].m_params.push_back(m_center);

}

//------------------------------------------------------------

FX_PLUGIN_IDENTIFIER(Iwa_SpinGradientFx, "iwa_SpinGradientFx");