#include "stdfx.h"

#include "tfxparam.h"

#include "trop.h"

#include "warp.h"

#include "trasterfx.h"

//#include "timage_io.h"

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

class WarpFx final : public TStandardRasterFx {

  FX_PLUGIN_DECLARATION(WarpFx)

protected:

  TRasterFxPort m_warped, m_warper;

  TDoubleParamP m_intensity;

  TDoubleParamP m_gridStep;

  TBoolParamP m_sharpen;

public:

  WarpFx() : m_intensity(20), m_gridStep(2), m_sharpen(true) {

    addInputPort("Source", m_warped);

    addInputPort("warper", m_warper);

    bindParam(this, "intensity", m_intensity);

    bindParam(this, "sensitivity", m_gridStep);

    bindParam(this, "sharpen", m_sharpen);

    m_intensity->setValueRange(-1000, 1000);

    m_gridStep->setValueRange(2, 20);

  }

  virtual ~WarpFx() {}

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

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

    return isAlmostIsotropic(info.m_affine);

  }

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

  bool doGetBBox(double frame, TRectD &bBox,

                 const TRenderSettings &info) override {

    if (m_warped.isConnected()) {

      int ret = m_warped->doGetBBox(frame, bBox, info);

      if (ret && !bBox.isEmpty()) {

        if (bBox != TConsts::infiniteRectD) {

          WarpParams params;

          params.m_intensity = m_intensity->getValue(frame);

          bBox = bBox.enlarge(getWarpRadius(params));

        }

        return true;

      }

    }

    bBox = TRectD();

    return false;

  }

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

  void doDryCompute(TRectD &rect, double frame,

                    const TRenderSettings &info) override {

    bool isWarped = m_warped.isConnected();

    bool isWarper = m_warper.isConnected();

    if (!isWarped) return;

    if (!isWarper || fabs(m_intensity->getValue(frame)) < 0.01) {

      m_warped->dryCompute(rect, frame, info);

      return;

    }

    int shrink      = (info.m_shrinkX + info.m_shrinkY) / 2;

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

    double gridStep = 1.5 * m_gridStep->getValue(frame);

    WarpParams params;

    params.m_intensity   = m_intensity->getValue(frame) / gridStep;

    params.m_warperScale = scale * gridStep;

    params.m_sharpen     = m_sharpen->getValue();

    params.m_shrink      = shrink;

    TRenderSettings warperInfo(info);

    double warperScaleFactor = 1.0 / params.m_warperScale;

    warperInfo.m_affine      = TScale(warperScaleFactor) * info.m_affine;

    TRectD warpedBox, warpedComputeRect, tileComputeRect;

    m_warped->getBBox(frame, warpedBox, info);

    getWarpComputeRects(tileComputeRect, warpedComputeRect, warpedBox, rect,

                        params);

    if (tileComputeRect.getLx() <= 0 || tileComputeRect.getLy() <= 0) return;

    if (warpedComputeRect.getLx() <= 0 || warpedComputeRect.getLy() <= 0)

      return;

    TPointD db;

    TRectD warperComputeRect(TScale(warperScaleFactor) * tileComputeRect);

    double warperEnlargement = getWarperEnlargement(params);

    warperComputeRect        = warperComputeRect.enlarge(warperEnlargement);

    warperComputeRect.x0     = tfloor(warperComputeRect.x0);

    warperComputeRect.y0     = tfloor(warperComputeRect.y0);

    warperComputeRect.x1     = tceil(warperComputeRect.x1);

    warperComputeRect.y1     = tceil(warperComputeRect.y1);

    m_warped->dryCompute(warpedComputeRect, frame, info);

    m_warper->dryCompute(warperComputeRect, frame, warperInfo);

  }

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

  void doCompute(TTile &tile, double frame,

                 const TRenderSettings &info) override {

    bool isWarped = m_warped.isConnected();

    bool isWarper = m_warper.isConnected();

    if (!isWarped) return;

    if (!isWarper) {

      m_warped->compute(tile, frame, info);

      return;

    }

    if (fabs(m_intensity->getValue(frame)) < 0.01) {

      m_warped->compute(tile, frame, info);

      return;

    }

    int shrink      = (info.m_shrinkX + info.m_shrinkY) / 2;

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

    double gridStep = 1.5 * m_gridStep->getValue(frame);

    // NOTE: The gridStep is absorbed by the warper scale and the intensity -

    // the former

    // balancing the latter.

    WarpParams params;

    params.m_intensity   = m_intensity->getValue(frame) / gridStep;

    params.m_warperScale = scale * gridStep;

    params.m_sharpen     = m_sharpen->getValue();

    params.m_shrink      = shrink;

    // The warper is calculated with a fixed dpi. This makes sure that the

    // lattice

    // created for the warp does not depend on camera resolutions / affine

    // scales.

    TRenderSettings warperInfo(info);

    double warperScaleFactor = 1.0 / params.m_warperScale;

    warperInfo.m_affine      = TScale(warperScaleFactor) * info.m_affine;

    // Retrieve tile's geometry

    TRectD tileRect;

    {

      TRasterP tileRas = tile.getRaster();

      tileRect =

          TRectD(tile.m_pos, TDimensionD(tileRas->getLx(), tileRas->getLy()));

    }

    // Build the compute rect

    TRectD warpedBox, warpedComputeRect, tileComputeRect;

    m_warped->getBBox(frame, warpedBox, info);

    getWarpComputeRects(tileComputeRect, warpedComputeRect, warpedBox, tileRect,

                        params);

    if (tileComputeRect.getLx() <= 0 || tileComputeRect.getLy() <= 0) return;

    if (warpedComputeRect.getLx() <= 0 || warpedComputeRect.getLy() <= 0)

      return;

    TRectD warperComputeRect(TScale(warperScaleFactor) * tileComputeRect);

    double warperEnlargement = getWarperEnlargement(params);

    warperComputeRect        = warperComputeRect.enlarge(warperEnlargement);

    warperComputeRect.x0     = tfloor(warperComputeRect.x0);

    warperComputeRect.y0     = tfloor(warperComputeRect.y0);

    warperComputeRect.x1     = tceil(warperComputeRect.x1);

    warperComputeRect.y1     = tceil(warperComputeRect.y1);

    // Compute the warped tile

    TTile tileIn;

    m_warped->allocateAndCompute(

        tileIn, warpedComputeRect.getP00(),

        TDimension(warpedComputeRect.getLx(), warpedComputeRect.getLy()),

        tile.getRaster(), frame, info);

    // Compute the warper tile

    TTile tileWarper;

    m_warper->allocateAndCompute(

        tileWarper, warperComputeRect.getP00(),

        TDimension(warperComputeRect.getLx(), warperComputeRect.getLy()),

        tile.getRaster(), frame, warperInfo);

    // Warp

    TRasterP rasIn     = tileIn.getRaster();

    TRasterP rasWarper = tileWarper.getRaster();

    TPointD db;

    TRect rasComputeRectI(convert(tileComputeRect - tileRect.getP00(), db));

    TRasterP tileRas = tile.getRaster()->extract(rasComputeRectI);

    TPointD rasInPos(warpedComputeRect.getP00() - tileComputeRect.getP00());

    TPointD warperPos(

        (TScale(params.m_warperScale) * warperComputeRect.getP00()) -

        tileComputeRect.getP00());

    warp(tileRas, rasIn, rasWarper, rasInPos, warperPos, params);

  }

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

  int getMemoryRequirement(const TRectD &rect, double frame,

                           const TRenderSettings &info) override {

    // return 0;   //For debug purpose

    int shrink      = (info.m_shrinkX + info.m_shrinkY) / 2;

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

    double gridStep = 1.5 * m_gridStep->getValue(frame);

    WarpParams params;

    params.m_intensity   = m_intensity->getValue(frame) / gridStep;

    params.m_warperScale = scale * gridStep;

    params.m_sharpen     = m_sharpen->getValue();

    params.m_shrink      = shrink;

    double warperScaleFactor = 1.0 / params.m_warperScale;

    TRectD warpedBox, warpedComputeRect, tileComputeRect;

    m_warped->getBBox(frame, warpedBox, info);

    getWarpComputeRects(tileComputeRect, warpedComputeRect, warpedBox, rect,

                        params);

    TRectD warperComputeRect(TScale(warperScaleFactor) * tileComputeRect);

    double warperEnlargement = getWarperEnlargement(params);

    warperComputeRect        = warperComputeRect.enlarge(warperEnlargement);

    return std::max(TRasterFx::memorySize(warpedComputeRect, info.m_bpp),

                    TRasterFx::memorySize(warperComputeRect, info.m_bpp));

  }

};

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

FX_PLUGIN_IDENTIFIER(WarpFx, "warpFx")