#include "iwa_lineargradientfx.h"

#include "tspectrumparam.h"

#include "gradients.h"

#include "tparamuiconcept.h"

#include "traster.h"

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

Iwa_LinearGradientFx::Iwa_LinearGradientFx()

    : m_startPoint(TPointD(-50.0, 0.0))

    , m_endPoint(TPointD(50.0, 0.0))

    , m_startColor(TPixel32::Black)

    , m_endColor(TPixel32::White)

    , m_curveType(new TIntEnumParam(EaseInOut, "Ease In-Out"))

    , m_wave_amplitude(0.0)

    , m_wave_freq(0.0)

    , m_wave_phase(0.0) {

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

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

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

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

  bindParam(this, "startPoint", m_startPoint);

  bindParam(this, "endPoint", m_endPoint);

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

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

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

  bindParam(this, "curveType", m_curveType);

  m_wave_amplitude->setValueRange(0, std::numeric_limits<double>::max());</double>

  m_wave_amplitude->setMeasureName("fxLength");

  bindParam(this, "wave_amplitude", m_wave_amplitude);

  bindParam(this, "wave_frequency", m_wave_freq);

  bindParam(this, "wave_phase", m_wave_phase);

  bindParam(this, "startColor", m_startColor);

  bindParam(this, "endColor", m_endColor);

}

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

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

                                     const TRenderSettings &ri) {

  bBox = TConsts::infiniteRectD;

  return true;

}

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

namespace {

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

void doLinearGradientT(RASTER ras, TDimensionI dim, TPointD startPos,

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

                       GradientCurveType type, double w_amplitude,

                       double w_freq, double w_phase, const TAffine &affInv) {

  auto getFactor = [&](double t) {

    if (t > 1.0)

      t = 1.0;

    else if (t < 0.0)

      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;

  };

  startPos      = affInv * startPos;

  endPos        = affInv * endPos;

  TPointD seVec = endPos - startPos;

  if (seVec == TPointD()) {

    ras->fill(spectrum.getPremultipliedValue(0.0));

    return;

  }

  TPointD posTrasf = -startPos;

  double seVecLen2 = seVec.x * seVec.x + seVec.y * seVec.y;

  double seVecLen  = sqrt(seVecLen2);

  double amplitude = w_amplitude / seVecLen;

  TPointD auxVec(-seVec.y / seVecLen, seVec.x / seVecLen);

  ras->lock();

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

    TPointD posAux = posTrasf;

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

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

    while (pix < endPix) {

      double t = (seVec.x * posAux.x + seVec.y * posAux.y) / seVecLen2;

      if (amplitude) {

        double distance = posAux.x * auxVec.x + posAux.y * auxVec.y;

        t += amplitude * sin(w_freq * distance + w_phase);

      }

      double factor = getFactor(t);

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

      posAux.x += affInv.a11;

      posAux.y += affInv.a21;

    }

    posTrasf.x += affInv.a12;

    posTrasf.y += affInv.a22;

  }

  ras->unlock();

}

}  // namespace

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

void Iwa_LinearGradientFx::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 startPos = aff * m_startPoint->getValue(frame) -

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

  TPointD endPos = aff * m_endPoint->getValue(frame) -

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

  double w_amplitude = m_wave_amplitude->getValue(frame) / ri.m_shrinkX;

  double w_freq      = m_wave_freq->getValue(frame) * ri.m_shrinkX;

  double w_phase     = m_wave_phase->getValue(frame);

  w_freq *= 0.01 * M_PI_180;

  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);

  tile.getRaster()->clear();

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

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

  if (outRas32)

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

        outRas32, dimOut, startPos, endPos, m_colors->getValue(frame),

        (GradientCurveType)m_curveType->getValue(), w_amplitude, w_freq,

        w_phase, aff.inv());

  else if (outRas64)

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

        outRas64, dimOut, startPos, endPos, m_colors->getValue64(frame),

        (GradientCurveType)m_curveType->getValue(), w_amplitude, w_freq,

        w_phase, aff.inv());

}

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

void Iwa_LinearGradientFx::getParamUIs(TParamUIConcept *&concepts,

                                       int &length) {

  concepts = new TParamUIConcept[length = 1];

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

  concepts[0].m_label = "";

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

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

}

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

FX_PLUGIN_IDENTIFIER(Iwa_LinearGradientFx, "iwa_LinearGradientFx");