#include "stdfx.h"

#include "tfxparam.h"

//#include "trop.h"

#include "tpixelutils.h"

#include "trasterfx.h"

#include "tparamset.h"

//==================================================================

class TargetSpotFx final : public TStandardZeraryFx {

  FX_PLUGIN_DECLARATION(TargetSpotFx)

  TDoubleParamP m_z;

  TDoubleParamP m_angle;

  TDoubleParamP m_decay;

  TDoubleParamP m_sizex;

  TDoubleParamP m_sizey;

  TPixelParamP m_color;

public:

  TargetSpotFx()

      : m_z(100)                // args, "Z")

      , m_angle(10)             // args, "Angle")

      , m_decay(.01)            // args, "Angle")

      , m_sizex(1)              // args, "SizeX")

      , m_sizey(1)              // args, "sizeY")

      , m_color(TPixel::White)  // args, "Color")

  {

    bindParam(this, "z", m_z);

    bindParam(this, "angle", m_angle);

    bindParam(this, "decay", m_decay);

    bindParam(this, "sizeX", m_sizex);

    bindParam(this, "sizeY", m_sizey);

    bindParam(this, "color", m_color);

    m_decay->setValueRange(0.0, 1.0);

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

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

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

    m_angle->setMeasureName("angle");

  }

  ~TargetSpotFx(){};

  bool doGetBBox(double, TRectD &bBox, const TRenderSettings &info) override {

    bBox = TConsts::infiniteRectD;

    return true;  // si potrebbe/dovrebbe fare meglio

  };

  void doCompute(TTile &tile, double frame, const TRenderSettings &ri) override;

  bool canHandle(const TRenderSettings &info, double frame) override {

    return false;

  }

};

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

void doTargetSpot(const TRasterPT<pixel> &ras, TPixel32 m_color0, double sizex,</pixel>

                  double sizey, double angle, double decay, double z,

                  TPointD tilepos) {

  PIXEL color1 = PIXEL::Black;

  PIXEL color0 = PixelConverter<pixel>::from(m_color0);</pixel>

  double normx     = 1 / sizex;

  double normy     = 1 / sizey;

  double reference = 5 * z;

  angle            = angle * M_PI_180;

  double ttan;

  ttan = tan(angle);

  int j;

  ras->lock();

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

    TPointD pos = tilepos;

    pos.y += j;

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

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

    while (pix < endPix) {

      double dist, norm;

      pos.x += 1.0;

      const double ztmp(-ttan * pos.x + z);

      const double zz(ztmp * ztmp);

      const double distxy(pos.x * pos.x * normx + pos.y * pos.y * normy);

      dist = distxy - zz;

      norm = sqrt(distxy + zz);

      if (norm < 0) norm *= -1;

      if (dist < 0 && (-ttan * pos.x + z) > 0) {

        *pix++ =

            blend(color0, color1,

                  norm * decay > 1 ? 1 : (norm * decay < 0 ? 0 : norm * decay));

      } else if (dist < reference && ztmp > 0) {

        PIXEL tmp =

            blend(color0, color1,

                  norm * decay > 1 ? 1 : (norm * decay < 0 ? 0 : norm * decay));

        *pix++ = blend(tmp, color1, dist / (reference));

      } else

        *pix++ = color1;

    }

  }

  ras->unlock();

}

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

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

                             const TRenderSettings &ri) {

  double z     = m_z->getValue(frame) * ri.m_affine.a11;

  double angle = m_angle->getValue(frame);

  double sizex = m_sizex->getValue(frame) / (ri.m_shrinkX * ri.m_shrinkX);

  double sizey = m_sizey->getValue(frame) / (ri.m_shrinkX * ri.m_shrinkX);

  const TPixel32 m_color0 = m_color->getPremultipliedValue(frame);

  double decay            = m_decay->getValue(frame) / 100;

  TPointD pos = tile.m_pos;

  TRaster32P raster32 = tile.getRaster();

  if (raster32)

    doTargetSpot<tpixel32>(raster32, m_color0, sizex, sizey, angle, decay, z,</tpixel32>

                           pos);

  else {

    TRaster64P raster64 = tile.getRaster();

    if (raster64)

      doTargetSpot<tpixel64>(raster64, m_color0, sizex, sizey, angle, decay, z,</tpixel64>

                             pos);

    else

      throw TException("Brightness&Contrast: unsupported Pixel Type");

  }

}

FX_PLUGIN_IDENTIFIER(TargetSpotFx, "targetSpotFx")