#include "stdfx.h"

#include "tfxparam.h"

#include "tpixelutils.h"

#include "tparamset.h"

#include "ttonecurveparam.h"

#include "tcurves.h"

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

namespace {

int getCubicYfromX(TCubic c, int x, double &s0, double &s1) {

  double s  = (s1 + s0) * 0.5;

  TPointD p = c.getPoint(s);

  if (areAlmostEqual(double(x), p.x, 0.001)) return tround(p.y);

  if (x < p.x)

    return getCubicYfromX(c, x, s0, s);

  else

    return getCubicYfromX(c, x, s, s1);

}

int getLinearYfromX(TSegment t, int x, double &s0, double &s1) {

  double s  = (s1 + s0) * 0.5;

  TPointD p = t.getPoint(s);

  if (areAlmostEqual(double(x), p.x, 0.001)) return tround(p.y);

  if (x < p.x)

    return getLinearYfromX(t, x, s0, s);

  else

    return getLinearYfromX(t, x, s, s1);

}

void truncateSpeeds(double aFrame, double bFrame, TPointD &aSpeedTrunc,

                    TPointD &bSpeedTrunc) {

  double deltaX = bFrame - aFrame;

  if (aSpeedTrunc.x < 0) aSpeedTrunc.x = 0;

  if (bSpeedTrunc.x > 0) bSpeedTrunc.x = 0;

  if (aFrame + aSpeedTrunc.x > bFrame) {

    if (aSpeedTrunc.x != 0) {

      aSpeedTrunc = aSpeedTrunc * (deltaX / aSpeedTrunc.x);

    }

  }

  if (bFrame + bSpeedTrunc.x < aFrame) {

    if (bSpeedTrunc.x != 0) {

      bSpeedTrunc = -bSpeedTrunc * (deltaX / bSpeedTrunc.x);

    }

  }

}

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

void fill_lut(QList<tpointd> points, std::vector<t> &lut, bool isLinear) {</t></tpointd>

  int i;

  TPointD p0 = points.at(0);

  TCubic cubic;

  TSegment segment;

  double s0 = 0.0;

  for (i = 1; i < points.size(); i++) {

    TPointD p1 = points.at(i);

    TPointD p2 = points.at(++i);

    TPointD p3 = points.at(++i);

    if (!isLinear) {

      // truncate speed

      TPointD aSpeed(p1 - p0);

      TPointD bSpeed(p2 - p3);

      truncateSpeeds(p0.x, p3.x, aSpeed, bSpeed);

      cubic.setP0(p0);

      cubic.setP1(p0 + aSpeed);

      cubic.setP2(p3 + bSpeed);

      cubic.setP3(p3);

      int x = (int)p0.x;

      while (x < 0) x++;

      while (x < p3.x && x < PIXEL::maxChannelValue + 1) {

        double s1 = 1.0;

        int y     = getCubicYfromX(cubic, x, s0, s1);

        if (y > PIXEL::maxChannelValue)

          y = PIXEL::maxChannelValue;

        else if (y < 0)

          y = 0;

        lut[x] = y;

        x++;

      }

    } else {

      segment.setP0(p0);

      segment.setP1(p3);

      int x = (int)p0.x;

      while (x < 0) x++;

      while (x < p3.x && x < PIXEL::maxChannelValue + 1) {

        double s1 = 1.0;

        int y     = getLinearYfromX(segment, x, s0, s1);

        if (y > PIXEL::maxChannelValue)

          y = PIXEL::maxChannelValue;

        else if (y < 0)

          y = 0;

        lut[x] = y;

        x++;

      }

    }

    p0 = p3;

  }

}

}  // Namespace

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

class ToneCurveFx final : public TStandardRasterFx {

  FX_PLUGIN_DECLARATION(ToneCurveFx)

  TRasterFxPort m_input;

  TToneCurveParamP m_toneCurve;

public:

  ToneCurveFx() : m_toneCurve(new TToneCurveParam()) {

    bindParam(this, "curve", m_toneCurve);

    addInputPort("Source", m_input);

  }

  ~ToneCurveFx(){};

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

    return true;

  }

  bool doGetBBox(double frame, TRectD &bBox,

                 const TRenderSettings &info) override {

    if (m_input.isConnected())

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

    else {

      bBox = TRectD();

      return false;

    }

  }

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

};

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

namespace {

void update_param(double ¶m, TRaster32P ras) { return; }

void update_param(double ¶m, TRaster64P ras) {

  param = param * 257;

  return;

}

QList<tpointd> getParamSetPoints(const TParamSet *paramSet, int frame) {</tpointd>

  QList<tpointd> points;</tpointd>

  int i;

  for (i = 0; i < paramSet->getParamCount(); i++) {

    TPointParamP pointParam = paramSet->getParam(i);

    TPointD point           = pointParam->getValue(frame);

    int x                   = (int)point.x;

    int y                   = (int)point.y;

    points.push_back(TPointD(x, y));

  }

  return points;

}

}  // namespace

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

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

void doToneCurveFx(TRasterPT<pixel> ras, double frame,</pixel>

                   const TToneCurveParam *toneCurveParam) {

  QList<qlist<tpointd>> pointsList;</qlist<tpointd>

  int e;

  for (e = 0; e < 6; e++) {

    TParamSet *paramSet =

        toneCurveParam->getParamSet(TToneCurveParam::ToneChannel(e))

            .getPointer();

    QList<tpointd> points = getParamSetPoints(paramSet, frame);</tpointd>

    pointsList.push_back(points);

  }

  bool isLinear = toneCurveParam->isLinear();

  int i, t;

  for (i = 0; i < pointsList.size(); i++) {

    QList<tpointd> &points = pointsList[i];</tpointd>

    for (t = 0; t < points.size(); t++) {

      TPointD &p = points[t];

      double &x  = p.x;

      double &y  = p.y;

      update_param(x, ras);

      update_param(y, ras);

    }

  }

  std::vector<channel_type> rgbaLut(PIXEL::maxChannelValue + 1);</channel_type>

  std::vector<channel_type> rgbLut(PIXEL::maxChannelValue + 1);</channel_type>

  std::vector<channel_type> rLut(PIXEL::maxChannelValue + 1);</channel_type>

  std::vector<channel_type> gLut(PIXEL::maxChannelValue + 1);</channel_type>

  std::vector<channel_type> bLut(PIXEL::maxChannelValue + 1);</channel_type>

  std::vector<channel_type> aLut(PIXEL::maxChannelValue + 1);</channel_type>

  fill_lut<pixel, channel_type="">(pointsList[0], rgbaLut, isLinear);</pixel,>

  fill_lut<pixel, channel_type="">(pointsList[1], rgbLut, isLinear);</pixel,>

  fill_lut<pixel, channel_type="">(pointsList[2], rLut, isLinear);</pixel,>

  fill_lut<pixel, channel_type="">(pointsList[3], gLut, isLinear);</pixel,>

  fill_lut<pixel, channel_type="">(pointsList[4], bLut, isLinear);</pixel,>

  fill_lut<pixel, channel_type="">(pointsList[5], aLut, isLinear);</pixel,>

  int lx = ras->getLx();

  int ly = ras->getLy();

  int j;

  ras->lock();

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

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

    PIXEL *endPix = pix + lx;

    while (pix < endPix) {

      if (pix->m != 0 && pix->m != PIXEL::maxChannelValue)

        *pix = depremultiply(*pix);

      pix->r = rLut[(int)(pix->r)];

      pix->g = gLut[(int)(pix->g)];

      pix->b = bLut[(int)(pix->b)];

      pix->m = aLut[(int)(pix->m)];

      pix->r = rgbLut[(int)(pix->r)];

      pix->g = rgbLut[(int)(pix->g)];

      pix->b = rgbLut[(int)(pix->b)];

      pix->r = rgbaLut[(int)(pix->r)];

      pix->g = rgbaLut[(int)(pix->g)];

      pix->b = rgbaLut[(int)(pix->b)];

      pix->m = rgbaLut[(int)(pix->m)];

      if (pix->m != 0 && pix->m != PIXEL::maxChannelValue)

        *pix = premultiply(*pix);

      pix++;

    }

  }

  ras->unlock();

}

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

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

                            const TRenderSettings &ri) {

  if (!m_input.isConnected()) return;

  m_input->compute(tile, frame, ri);

  TRaster32P raster32 = tile.getRaster();

  if (raster32)

    doToneCurveFx<tpixel32, uchar="">(raster32, frame, m_toneCurve.getPointer());</tpixel32,>

  else {

    TRaster64P raster64 = tile.getRaster();

    if (raster64)

      doToneCurveFx<tpixel64, ushort="">(raster64, frame,</tpixel64,>

                                      m_toneCurve.getPointer());

    else

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

  }

}

FX_PLUGIN_IDENTIFIER(ToneCurveFx, "toneCurveFx");