#include "stdfx.h"

#include "tfxparam.h"

#include "tparamset.h"

#include "tparamuiconcept.h"

class RadialBlurFx final : public TStandardRasterFx {

  FX_PLUGIN_DECLARATION(RadialBlurFx)

  TRasterFxPort m_input;

  TPointParamP m_point;

  TDoubleParamP m_radius;

  TDoubleParamP m_blur;

public:

  RadialBlurFx() : m_point(TPointD(0.0, 0.0)), m_radius(0.0), m_blur(5.0) {

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

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

    m_radius->setMeasureName("fxLength");

    bindParam(this, "point", m_point);

    bindParam(this, "radius", m_radius);

    bindParam(this, "blur", m_blur);

    addInputPort("Source", m_input);

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

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

  }

  ~RadialBlurFx(){};

  int getMaxBraid(const TRectD &bBox, double frame,

                  const TAffine &aff = TAffine()) {

    double scale  = sqrt(fabs(aff.det()));

    TPointD point = aff * m_point->getValue(frame);

    double radius = m_radius->getValue(frame) * scale;

    double blur   = m_blur->getValue(frame);

    double intensity = blur * M_PI_180;

    TPointD p1 = bBox.getP00() - point;

    TPointD p2 = bBox.getP01() - point;

    TPointD p3 = bBox.getP10() - point;

    TPointD p4 = bBox.getP11() - point;

    double d1  = p1.x * p1.x + p1.y * p1.y;

    double d2  = p2.x * p2.x + p2.y * p2.y;

    double d3  = p3.x * p3.x + p3.y * p3.y;

    double d4  = p4.x * p4.x + p4.y * p4.y;

    double maxD = std::max(std::max(std::max(d3, d4), d2), d1);

    return tround(std::max(sqrt(maxD) - radius, 0.0)) * intensity;

  }

  void enlarge(const TRectD &bbox, TRectD &requestedGeom,

               const TRenderSettings &ri, double frame);

  bool doGetBBox(double frame, TRectD &bBox,

                 const TRenderSettings &info) override {

    if (m_input.isConnected()) {

      m_input->doGetBBox(frame, bBox, info);

      bBox = bBox.enlarge(getMaxBraid(bBox, frame));

      return true;

    } else {

      bBox = TRectD();

      return false;

    }

  }

  void transform(double frame, int port, const TRectD &rectOnOutput,

                 const TRenderSettings &infoOnOutput, TRectD &rectOnInput,

                 TRenderSettings &infoOnInput) override;

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

  int getMemoryRequirement(const TRectD &rect, double frame,

                           const TRenderSettings &info) override;

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

    if (info.m_isSwatch) return true;

    return m_blur->getValue(frame) == 0 ? true

                                        : isAlmostIsotropic(info.m_affine);

  }

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

    concepts = new TParamUIConcept[length = 2];

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

    concepts[0].m_label = "Center";

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

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

    concepts[1].m_label = "Radius";

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

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

  }

};

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

template <typename channel_type,="" int="" max_channel_value="" pixel,="" typename=""></typename>

void doRadialBlur(const TRasterPT<pixel> rout, const TRasterPT<pixel> rin,</pixel></pixel>

                  double blur, double radius, TPointD point) {

  /*-センター位置-*/

  int dx = (int)point.x;

  int dy = (int)point.y;

  int i, j;

  /*- 出力サイズ -*/

  int lx = rout->getLx();

  int ly = rout->getLy();

  PIXEL *src_buf, *dst_buf;

  /*- チャンネル最大値(bppにより異なる) -*/

  double CROP_VAL         = (double)MAX_CHANNEL_VALUE;

  CHANNEL_TYPE U_CROP_VAL = MAX_CHANNEL_VALUE;

  double intensity = blur * M_PI_180;

  /*-出力サイズの画面の中の、ブラーのセンター位置-*/

  int cx = lx / 2 + dx;

  int cy = ly / 2 + dy;

  rin->lock();

  rout->lock();

  for (i = 0; i < ly; i++) {

    src_buf = rin->pixels(i);

    dst_buf = rout->pixels(i);

    for (j = 0; j < lx; j++, src_buf++, dst_buf++) {

      double valr = 0, valg = 0, valb = 0, valm = 0;

      double sinangle = 0, cosangle = 0;

      double angle = 0, dist, rangeinv = 0;

      int ii, vx, vy;

      int shiftx, shifty, range = 0, rangehalf;

      /*- ブラー中心→現在のピクセルへのベクトル -*/

      vx   = (int)(j - cx);

      vy   = (int)(i - cy);

      dist = sqrt((double)(vx * vx + vy * vy));

      /*- ブラーのかかる大きさ。（距離-radius）に比例 -*/

      range = (int)((dist - radius) * intensity);

      /*- ブラーが少しでもかかる場合 -*/

      if (range >= 1 && (dist - radius) > 0) {

        rangehalf = range / 2;

        /*- ブラーの角度 -*/

        angle    = atan2((double)vy, (double)vx);

        cosangle = cos(angle);

        if (vx)

          sinangle = cosangle * (vy / (float)vx);

        else

          sinangle = sin(angle);

        for (ii = 0; ii <= range; ii++) {

          shiftx = (int)((ii - rangehalf) * cosangle);

          shifty = (int)((ii - rangehalf) * sinangle);

          /*- 画面外にはみだす条件 -*/

          if ((j + shiftx) < 0) continue;    // shiftx=-j;

          if ((j + shiftx) >= lx) continue;  // shiftx=lx-j-1;

          if ((i + shifty) < 0) continue;    // shifty=-i;

          if ((i + shifty) >= ly) continue;  // shifty=ly-i-1;

          valr += rin->pixels(i + shifty)[j + shiftx].r;

          valg += rin->pixels(i + shifty)[j + shiftx].g;

          valb += rin->pixels(i + shifty)[j + shiftx].b;

          valm += rin->pixels(i + shifty)[j + shiftx].m;

        }

        rangeinv = 1.0 / (range + 1);

        valr *= rangeinv;

        valg *= rangeinv;

        valb *= rangeinv;

        valm *= rangeinv;

        dst_buf->r = (valr > CROP_VAL) ? U_CROP_VAL

                                       : ((valr < 0) ? 0 : (CHANNEL_TYPE)valr);

        dst_buf->g = (valg > CROP_VAL) ? U_CROP_VAL

                                       : ((valg < 0) ? 0 : (CHANNEL_TYPE)valg);

        dst_buf->b = (valb > CROP_VAL) ? U_CROP_VAL

                                       : ((valb < 0) ? 0 : (CHANNEL_TYPE)valb);

        dst_buf->m = (valm > CROP_VAL) ? U_CROP_VAL

                                       : ((valm < 0) ? 0 : (CHANNEL_TYPE)valm);

      } else {

        *(dst_buf) = *(src_buf);

      }

    }

  }

  rin->unlock();

  rout->unlock();

}

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

//! Calculates the geometry we need for this node computation, given

//! the known input data (bbox) and the requested output (requestedGeom).

void RadialBlurFx::enlarge(const TRectD &bbox, TRectD &requestedGeom,

                           const TRenderSettings &ri, double frame) {

  TRectD enlargedBbox(bbox);

  TRectD enlargedGeom(requestedGeom);

  TPointD originalP00(requestedGeom.getP00());

  double maxRange = getMaxBraid(enlargedBbox, frame, ri.m_affine);

  /*- 最低でも1pixel追加する -*/

  maxRange = std::max(maxRange, 1.0);

  enlargedBbox = enlargedBbox.enlarge(maxRange);

  enlargedGeom = enlargedGeom.enlarge(maxRange);

  // We are to find out the geometry that is useful for the fx computation.

  // There are some rules to follow:

  //  a) First, the interesting output we can generate is bounded by both

  //     the requestedRect and the blurred bbox (i.e. enlarged by the blur

  //     radius).

  //  b) Pixels contributing to any output are necessarily part of bbox - and

  //  only

  //     those which are blurrable into the requestedRect are useful to us

  //     (i.e. pixels contained in its enlargement by the blur radius).

  requestedGeom = (enlargedGeom * bbox) + (enlargedBbox * requestedGeom);

  // Finally, make sure that the result is coherent with the original P00

  requestedGeom -= originalP00;

  requestedGeom.x0 = tfloor(requestedGeom.x0);

  requestedGeom.y0 = tfloor(requestedGeom.y0);

  requestedGeom.x1 = tceil(requestedGeom.x1);

  requestedGeom.y1 = tceil(requestedGeom.y1);

  requestedGeom += originalP00;

}

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

void RadialBlurFx::transform(double frame, int port, const TRectD &rectOnOutput,

                             const TRenderSettings &infoOnOutput,

                             TRectD &rectOnInput,

                             TRenderSettings &infoOnInput) {

  TRectD rectOut(rectOnOutput);

  if (canHandle(infoOnOutput, frame))

    infoOnInput = infoOnOutput;

  else {

    infoOnInput          = infoOnOutput;

    infoOnInput.m_affine = TAffine();  // because the affine does not commute

    rectOut              = infoOnOutput.m_affine.inv() * rectOut;

  }

  TRectD bbox;

  m_input->getBBox(frame, bbox, infoOnInput);

  if (rectOnInput == TConsts::infiniteRectD) bbox = rectOut;

  rectOnInput = rectOut;

  enlarge(bbox, rectOnInput, infoOnInput, frame);

}

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

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

                             const TRenderSettings &ri) {

  if (!m_input.isConnected()) return;

  double scale  = sqrt(fabs(ri.m_affine.det()));

  TPointD point = ri.m_affine * m_point->getValue(frame);

  double radius = m_radius->getValue(frame) * scale;

  double blur   = m_blur->getValue(frame);

  TRectD tileRect = convert(tile.getRaster()->getBounds()) + tile.m_pos;

  TRectD bBox;

  m_input->getBBox(frame, bBox, ri);

  if (bBox.isEmpty()) return;

  if (bBox == TConsts::infiniteRectD) bBox = tileRect;

  enlarge(bBox, tileRect, ri, frame);

  TPointD tileRectCenter = (tileRect.getP00() + tileRect.getP11()) * 0.5;

  point -= tileRectCenter;

  int rasInLx = tileRect.getLx();

  int rasInLy = tileRect.getLy();

  TRaster32P raster32 = tile.getRaster();

  TRaster64P raster64 = tile.getRaster();

  TPoint offset = convert(tile.m_pos - tileRect.getP00());

  TTile tileIn;

  if (raster32) {

    m_input->allocateAndCompute(tileIn, tileRect.getP00(),

                                TDimension(rasInLx, rasInLy), raster32, frame,

                                ri);

    TRaster32P rin = tileIn.getRaster();

    TRaster32P app = raster32->create(rasInLx, rasInLy);

    doRadialBlur<tpixel32, 255="" uchar,="">(app, rin, blur, radius, point);</tpixel32,>

    raster32->copy(app, -offset);

  } else if (raster64) {

    TRaster64P raster64 = tile.getRaster();

    m_input->allocateAndCompute(tileIn, tileRect.getP00(),

                                TDimension(rasInLx, rasInLy), raster64, frame,

                                ri);

    TRaster64P rin = tileIn.getRaster();

    TRaster64P app = raster64->create(rasInLx, rasInLy);

    doRadialBlur<tpixel64, 65535="" ushort,="">(app, rin, blur, radius, point);</tpixel64,>

    raster64->copy(app, -offset);

  } else

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

}

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

int RadialBlurFx::getMemoryRequirement(const TRectD &rect, double frame,

                                       const TRenderSettings &info) {

  double scale  = sqrt(fabs(info.m_affine.det()));

  TPointD point = info.m_affine * m_point->getValue(frame);

  double blur   = m_blur->getValue(frame);

  TRectD bBox;

  m_input->getBBox(frame, bBox, info);

  if (bBox.isEmpty()) return 0;

  if (bBox == TConsts::infiniteRectD) bBox = rect;

  TRectD tileRect(rect);

  enlarge(bBox, tileRect, info, frame);

  return TRasterFx::memorySize(tileRect.enlarge(blur), info.m_bpp);

}

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

FX_PLUGIN_IDENTIFIER(RadialBlurFx, "radialBlurFx")