#include "trasterfx.h"

// Core-system includes

#include "tsystem.h"

#include "tthreadmessage.h"

// Fx basics

#include "tparamcontainer.h"

#include "tbasefx.h"

#include "tfxattributes.h"

// Images components

#include "timagecache.h"

#include "trasterimage.h"

#include "trop.h"

// Optimization components

#include "trenderresourcemanager.h"

#include "tfxcachemanager.h"

#include "trenderer.h"

// Diagnostics

//#define DIAGNOSTICS

#ifdef DIAGNOSTICS

#include "diagnostics.h"

#endif  // DIAGNOSTICS

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

namespace {

inline bool areEqual(const TRasterFxRenderDataP &d1,

                     const TRasterFxRenderDataP &d2) {

  return (*d1 == *d2);

}

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

inline int myCeil(double x) {

  return ((x - (int)(x)) > TConsts::epsilon ? (int)(x) + 1 : (int)(x));

}

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

inline TRect myConvert(const TRectD &r, TPointD &dp) {

  TRect ri(tfloor(r.x0), tfloor(r.y0), myCeil(r.x1), myCeil(r.y1));

  dp.x = r.x0 - ri.x0;

  dp.y = r.y0 - ri.y0;

  assert(dp.x >= 0 && dp.y >= 0);

  return ri;

}

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

inline bool myIsEmpty(const TRectD &r) {

  return r.getLx() < 1 || r.getLy() < 1;

}

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

inline TRect myConvert(const TRectD &rect) {

  return TRect(tround(rect.x0), tround(rect.y0), tround(rect.x1) - 1,

               tround(rect.y1) - 1);

}

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

inline TRectD myConvert(const TRect &rect) {

  return TRectD(rect.x0, rect.y0, rect.x1 + 1, rect.y1 + 1);

}

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

inline void enlargeToI(TRectD &r) {

  TRectD temp(tfloor(r.x0), tfloor(r.y0), tceil(r.x1), tceil(r.y1));

  // NOTE: If we enlarge a TConsts::infiniteRectD or one which trespass

  // ints' numerical bounds, the rect may become empty.

  if (!myIsEmpty(temp)) r = temp;

}

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

// Calculates the 2-norm of the passed affine A - that is, the max modulus

// of A*A's eigenvalues (*A being the adjoint).

double norm2(const TAffine &aff) {

  double a11 = aff.a11 * aff.a11 + aff.a12 * aff.a12;

  double a12 = aff.a11 * aff.a21 + aff.a12 * aff.a22;

  double a21 = aff.a21 * aff.a11 + aff.a22 * aff.a12;

  double a22 = aff.a21 * aff.a21 + aff.a22 * aff.a22;

  double a11plusa22 = a11 + a22;

  double delta      = sq(a11 - a22) + 4 * a12 * a21;

  delta = sqrt(delta);

  double eig1 = a11plusa22 + delta;

  double eig2 = a11plusa22 - delta;

  return std::max(sqrt(eig1 / 2.0), sqrt(eig2 / 2.0));

}

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

inline int getResampleFilterRadius(const TRenderSettings &info) {

  switch (info.m_quality) {

  case TRenderSettings::StandardResampleQuality:

    return 1;

  case TRenderSettings::ImprovedResampleQuality:

    return 2;

  case TRenderSettings::HighResampleQuality:

    return 3;

  case TRenderSettings::Triangle_FilterResampleQuality:

    return 1;

  case TRenderSettings::Mitchell_FilterResampleQuality:

    return 2;

  case TRenderSettings::Cubic5_FilterResampleQuality:

    return 2;

  case TRenderSettings::Cubic75_FilterResampleQuality:

    return 2;

  case TRenderSettings::Cubic1_FilterResampleQuality:

    return 2;

  case TRenderSettings::Hann2_FilterResampleQuality:

    return 2;

  case TRenderSettings::Hann3_FilterResampleQuality:

    return 3;

  case TRenderSettings::Hamming2_FilterResampleQuality:

    return 2;

  case TRenderSettings::Hamming3_FilterResampleQuality:

    return 3;

  case TRenderSettings::Lanczos2_FilterResampleQuality:

    return 2;

  case TRenderSettings::Lanczos3_FilterResampleQuality:

    return 3;

  case TRenderSettings::Gauss_FilterResampleQuality:

    return 2;

  case TRenderSettings::ClosestPixel_FilterResampleQuality:

    return 1;

  case TRenderSettings::Bilinear_FilterResampleQuality:

    return 1;

  default:

    assert(false);

    return -1;

  }

}

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

inline QString traduce(const TRectD &rect) {

  return "[" + QString::number(rect.x0) + " " + QString::number(rect.y0) + " " +

         QString::number(rect.x1) + " " + QString::number(rect.y1) + "]";

}

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

inline QString traduce(const TRect &rect) {

  return "[" + QString::number(rect.x0) + " " + QString::number(rect.y0) + " " +

         QString::number(rect.x1) + " " + QString::number(rect.y1) + "]";

}

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

inline QString qTraduce(const TAffine &aff) {

  return "[" + QString::number(aff.a11, 'g', 15) + "," +

         QString::number(aff.a12, 'g', 15) + "," +

         QString::number(aff.a13, 'g', 15) + "," +

         QString::number(aff.a21, 'g', 15) + "," +

         QString::number(aff.a22, 'g', 15) + "," +

         QString::number(aff.a23, 'g', 15) + "]";

}

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

inline std::string traduce(const TAffine &aff) {

  return

      // Observe that toString distinguishes + and - 0. That is a problem

      // when comparing aliases - so near 0 values are explicitly rounded to 0.

      (areAlmostEqual(aff.a11, 0.0) ? "0" : ::to_string(aff.a11, 5)) + "," +

      (areAlmostEqual(aff.a12, 0.0) ? "0" : ::to_string(aff.a12, 5)) + "," +

      (areAlmostEqual(aff.a13, 0.0) ? "0" : ::to_string(aff.a13, 5)) + "," +

      (areAlmostEqual(aff.a21, 0.0) ? "0" : ::to_string(aff.a21, 5)) + "," +

      (areAlmostEqual(aff.a22, 0.0) ? "0" : ::to_string(aff.a22, 5)) + "," +

      (areAlmostEqual(aff.a23, 0.0) ? "0" : ::to_string(aff.a23, 5));

}

}  // namespace

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

// The following should be cleared - and its functionalities surrendered

// directly

// to an appropriate resource manager...

//! Declares an image to be kept in cache until the render ends or is canceled.

void addRenderCache(const std::string &alias, TImageP image) {

  TFxCacheManager::instance()->add(alias, image);

}

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

//! The inverse function to addRenderCache.

void removeRenderCache(const std::string &alias) {

  TFxCacheManager::instance()->remove(alias);

}

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

//

// TrFx   (Affine Transformer Fx)

//

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

//! Internal fx node which applies the implicit affine stored in the

//! TRenderSettings structure,

//! replacing the old TRasterFx::doCompute.

class TrFx final : public TBaseRasterFx {

  FX_DECLARATION(TrFx)

  TRasterFx *m_fx;

public:

  TrFx() {}

  ~TrFx() {}

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

  void setFx(TRasterFx *fx) { m_fx = fx; }

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

  bool isCachable() const override {

    return true;

  }  // Currently cachable as a test. Observe that it was NOT in Toonz 6.1

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

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

    return true;

  }

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

  std::string getAlias(double frame,

                       const TRenderSettings &info) const override {

    // NOTE: TrFx are not present at this recursive level. Affines dealing is

    // currently handled by inserting the

    // rendering affine AFTER a getAlias call. Ever.

    std::string alias = getFxType();

    return alias + "[" + m_fx->getAlias(frame, info) + "]";

  }

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

  bool doGetBBox(double frame, TRectD &bBox,

                 const TRenderSettings &info) override {

    // NOTE: TrFx are not present at this recursive level. Affines dealing is

    // still handled by TGeometryFxs here....

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

  }

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

  void doCompute(TTile &tile, double frame,

                 const TRenderSettings &info) override {

    const TRectD &rectOut =

        myConvert(tile.getRaster()->getBounds()) + tile.m_pos;

    TRectD rectIn;

    TRenderSettings infoIn(info);

    TAffine appliedAff;

    if (!buildInput(rectOut, frame, info, rectIn, infoIn, appliedAff)) return;

    const TRect &rectInI = myConvert(rectIn);

    // rasIn e' un raster dello stesso tipo di tile.getRaster()

    TTile inTile;

    m_fx->allocateAndCompute(inTile, rectIn.getP00(),

                             TDimension(rectInI.getLx(), rectInI.getLy()),

                             tile.getRaster(), frame, infoIn);

    infoIn.m_affine = appliedAff;

    TRasterFx::applyAffine(tile, inTile, infoIn);

  }

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

  void doDryCompute(TRectD &rect, double frame,

                    const TRenderSettings &info) override {

    TRectD rectIn;

    TRenderSettings infoIn(info);

    TAffine appliedAff;

    if (!buildInput(rect, frame, info, rectIn, infoIn, appliedAff)) return;

    m_fx->dryCompute(rectIn, frame, infoIn);

  }

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

  int getMemoryRequirement(const TRectD &rect, double frame,

                           const TRenderSettings &info) override {

    TRectD rectIn;

    TRenderSettings infoIn(info);

    TAffine appliedAff;

    if (!buildInput(rect, frame, info, rectIn, infoIn, appliedAff)) return 0;

    return TRasterFx::memorySize(rectIn, info.m_bpp);

  }

private:

  bool buildInput(const TRectD &rectOut, double frame,

                  const TRenderSettings &infoOut, TRectD &rectIn,

                  TRenderSettings &infoIn, TAffine &appliedAff) {

    if (myIsEmpty(rectOut)) return false;

    // Build the affines

    infoIn.m_affine = m_fx->handledAffine(infoOut, frame);

    appliedAff      = infoOut.m_affine * infoIn.m_affine.inv();

    // Quick fix - prevent near-singular transforms.

    // NOTE: This check **SHOULD BE REMOVED** and dealt with at the RESAMPLING

    // level.

    //       Observe how the tolerance value is quite arbitrary! Yeah I know

    //       it's shameful... :(

    if (fabs(appliedAff.det()) < 1e-6)  // TO BE REMOVED

      return false;                     // TO BE REMOVED

    // Build the input rect

    const TAffine &appliedAffInv = appliedAff.inv();

    int filterRadius             = getResampleFilterRadius(infoOut);

    TRectD bbox;

    m_fx->getBBox(frame, bbox, infoIn);

    rectIn =

        ((appliedAffInv * rectOut)

             .enlarge(

                 filterRadius) +  // The filter size applies in input during

         (appliedAffInv * rectOut.enlarge(filterRadius))) *

        bbox;  // magnifications, and in output during

               // minifications. Thus, they basically cumulate.

    if (myIsEmpty(rectIn)) return false;

    enlargeToI(rectIn);

    return true;

  }

};

FX_IDENTIFIER_IS_HIDDEN(TrFx, "trFx")

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

//

// FxResourceBuilder

//

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

// This class is the internal interface with the cache regarding intermediate

// render

// results. Please refer to the ResourceBuilder documentation in

// tfxcachemanager.cpp

class FxResourceBuilder final : public ResourceBuilder {

  TRasterFxP m_rfx;

  double m_frame;

  const TRenderSettings *m_rs;

  TTile *m_outTile;

  TTile *m_currTile;

  TTile m_newTile;

  TRectD m_outRect;

public:

  FxResourceBuilder(const std::string &resourceName, const TRasterFxP &fx,

                    const TRenderSettings &rs, double frame)

      : ResourceBuilder(resourceName, fx.getPointer(), frame, rs)

      , m_rfx(fx)

      , m_frame(frame)

      , m_rs(&rs)

      , m_currTile(0) {}

  inline void build(TTile &tile);

protected:

  void simCompute(const TRectD &rect) override {

    TRectD rectCpy(

        rect);  // Why the hell dryCompute(..) has non-const TRectD& input ????

    m_rfx->doDryCompute(rectCpy, m_frame, *m_rs);

  }

  void buildTileToCalculate(const TRectD &tileRect);

  void compute(const TRectD &tileRect) override;

  void upload(TCacheResourceP &resource) override;

  bool download(TCacheResourceP &resource) override;

};

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

inline void FxResourceBuilder::build(TTile &tile) {

  m_outTile = &tile;

  TDimension dim(tile.getRaster()->getSize());

  m_outRect = TRectD(tile.m_pos, TDimensionD(dim.lx, dim.ly));

  ResourceBuilder::build(m_outRect);

}

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

void FxResourceBuilder::buildTileToCalculate(const TRectD &tileGeom) {

  if (tileGeom == m_outRect) {

    m_currTile = m_outTile;

    return;

  }

  m_newTile.m_pos = tileGeom.getP00();

  TRasterP outRas(m_outTile->getRaster());

  // If possible, try to reuse outRas's buffer.

  TDimension outputSize(outRas->getSize());

  TDimension requiredSize(tceil(tileGeom.getLx()), tceil(tileGeom.getLy()));

  TRasterP ras;

  if (outputSize.lx >= requiredSize.lx && outputSize.ly >= requiredSize.ly) {

    // Reuse fxOutput's buffer

    TRect rect(0, 0, requiredSize.lx - 1, requiredSize.ly - 1);

    ras = outRas->extract(rect);

    ras->clear();

  } else

    ras = outRas->create(requiredSize.lx, requiredSize.ly);

  m_newTile.setRaster(ras);

  m_currTile = &m_newTile;

}

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

void FxResourceBuilder::compute(const TRectD &tileRect) {

#ifdef DIAGNOSTICS

  TStopWatch sw;

  sw.start();

#endif

  buildTileToCalculate(tileRect);

  m_rfx->doCompute(*m_currTile, m_frame, *m_rs);

#ifdef DIAGNOSTICS

  sw.stop();

  DIAGNOSTICS_THRSET("FComputeTime", sw.getTotalTime());

#endif

}

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

void FxResourceBuilder::upload(TCacheResourceP &resource) {

  resource->upload(*m_currTile);

  if (m_currTile == &m_newTile) m_newTile.setRaster(0);

}

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

bool FxResourceBuilder::download(TCacheResourceP &resource) {

  // In case the output tile was used to calculate the fx, avoid downloading

  if (m_currTile == m_outTile) return true;

  return resource->downloadAll(*m_outTile);

}

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

//

// TRasterFx

//

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

class TRasterFx::TRasterFxImp {

public:

  bool m_cacheEnabled;

  TTile m_cachedTile;

  double m_frame;

  bool m_isEnabled;

  TRenderSettings m_info;

  std::string m_interactiveCacheId;

  mutable TThread::Mutex m_mutex;  // brutto

  TRasterFxImp() : m_cacheEnabled(false), m_isEnabled(true), m_cachedTile(0) {}

  ~TRasterFxImp() {}

  void enableCache(bool on) {

    QMutexLocker sl(&m_mutex);

    m_cacheEnabled = on;

    if (!m_cacheEnabled) {

      m_interactiveCacheId = "";

      m_frame              = 0;

      m_info               = TRenderSettings();

      m_cachedTile.setRaster(0);

      m_cachedTile.m_pos = TPointD();

    }

  }

  bool isCacheEnabled() const { return m_cacheEnabled; }

  bool isEnabled() const {

    QMutexLocker sl(&m_mutex);  // a che serve??

    return m_isEnabled;

  }

  void enable(bool on) {

    QMutexLocker sl(&m_mutex);  // a che serve

    m_isEnabled = on;

  }

};

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

TRasterFx::TRasterFx() : m_rasFxImp(new TRasterFxImp) {}

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

TRasterFx::~TRasterFx() { delete m_rasFxImp; }

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

TAffine TRasterFx::handledAffine(const TRenderSettings &info, double frame) {

  return (info.m_affine.a11 == info.m_affine.a22 && info.m_affine.a12 == 0 &&

          info.m_affine.a21 == 0 && info.m_affine.a13 == 0 &&

          info.m_affine.a23 == 0)

             ? info.m_affine

             : TScale(norm2(info.m_affine));

}

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

bool TRasterFx::getBBox(double frame, TRectD &bBox,

                        const TRenderSettings &info) {

  bool ret = doGetBBox(frame, bBox, info);

  bBox     = info.m_affine * bBox;

  enlargeToI(bBox);

  return ret;

}

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

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

                          const TRenderSettings &infoOnOutput,

                          TRectD &rectOnInput, TRenderSettings &infoOnInput) {

  rectOnInput = rectOnOutput;

  infoOnInput = infoOnOutput;

}

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

int TRasterFx::memorySize(const TRectD &rect, int bpp) {

  if (rect.x1 <= rect.x0 || rect.y1 <= rect.y0) return 0;

  return (unsigned long)(rect.getLx() + 1) * (unsigned long)(rect.getLy() + 1) *

             (bpp >> 3) >>

         20;

}

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

//! Specifies the approximate size (in MegaBytes) of the maximum allocation

//! instance that this fx

//! will need to perform in order to render the passed input.

//! This method should be reimplemented in order to make the Toonz rendering

//! process aware of

//! the use of big raster memory chunks, at least.

//! Observe that the passed tile geometry is implicitly  already allocated

//! <\i> for the fx output.

//! \n

//! The default implementation returns 0, assuming that the passed implicit

//! memory size is passed

//! below in node computation without further allocation of resources. Fxs can

//! reimplement this

//! to -1 to explicitly disable the Toonz's smart memory handling.

//! \n \n

//! \note The rendering process ensures that the passed render settings are \a

//! handled

//! by the fx before this function is invoked - do not waste code for it.

//! \sa TRasterFx::memorySize and TRasterFx::canHandle methods.

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

                                    const TRenderSettings &info) {

  return 0;

}

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

std::string TRasterFx::getAlias(double frame,

                                const TRenderSettings &info) const {

  std::string alias = getFxType();

  alias += "[";

  // alias degli effetti connessi alle porte di input separati da virgole

  // una porta non connessa da luogo a un alias vuoto (stringa vuota)

  int i;

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

    TFxPort *port = getInputPort(i);

    if (port->isConnected()) {

      TRasterFxP ifx = port->getFx();

      assert(ifx);

      alias += ifx->getAlias(frame, info);

    }

    alias += ",";

  }

  // alias dei valori dei parametri dell'effetto al frame dato

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

    TParam *param = getParams()->getParam(i);

    alias += param->getName() + "=" + param->getValueAlias(frame, 3);

  }

  alias += "]";

  return alias;

}

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

void TRasterFx::dryCompute(TRectD &rect, double frame,

                           const TRenderSettings &info) {

  if (checkActiveTimeRegion() && !getActiveTimeRegion().contains(frame)) return;

  if (!getAttributes()->isEnabled() || !m_rasFxImp->isEnabled()) {

    if (getInputPortCount() == 0) return;

    TFxPort *port = getInputPort(getPreferredInputPort());

    if (port->isConnected())

      TRasterFxP(port->getFx())->dryCompute(rect, frame, info);

    return;

  }

  // If the input tile has a fractionary position, it is passed to the

  // rendersettings' accumulated affine.

  TPoint intTilePos(tfloor(rect.x0), tfloor(rect.y0));

  TPointD fracTilePos(rect.x0 - intTilePos.x, rect.y0 - intTilePos.y);

  TPointD fracInfoTranslation(info.m_affine.a13 - fracTilePos.x,

                              info.m_affine.a23 - fracTilePos.y);

  TPoint intInfoTranslation(tfloor(fracInfoTranslation.x),

                            tfloor(fracInfoTranslation.y));

  TPointD newTilePos(intTilePos.x - intInfoTranslation.x,

                     intTilePos.y - intInfoTranslation.y);

  if (rect.getP00() != newTilePos) {

    TRenderSettings newInfo(info);

    newInfo.m_affine.a13 = fracInfoTranslation.x - intInfoTranslation.x;

    newInfo.m_affine.a23 = fracInfoTranslation.y - intInfoTranslation.y;

    TRectD newRect(newTilePos, rect.getSize());

    dryCompute(newRect, frame, newInfo);

    return;

  }

  // If the fx can't handle the whole affine passed with the TRenderSettings,

  // the part

  // of it that the fx can't handle is retained and applied by an affine

  // transformer fx (TrFx)

  // after the node has been computed.

  bool canHandleAffine =

      canHandle(info, frame) || (handledAffine(info, frame) == info.m_affine);

  if (!info.m_affine.isIdentity() && !canHandleAffine) {

    TrFx *transformerFx = new TrFx;

    TFxP locker(transformerFx);

    transformerFx->setFx(this);

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

    return;

  }

  std::string alias = getAlias(frame, info) + "[" + ::traduce(info.m_affine) +

                      "][" + std::to_string(info.m_bpp) + "]";

  int renderStatus =

      TRenderer::instance().getRenderStatus(TRenderer::renderId());

  TFxCacheManager *cacheManager = TFxCacheManager::instance();

  if (renderStatus == TRenderer::FIRSTRUN) {

    TRectD bbox;

    // ret = getBBox... puo' darsi che l'enlarge del trFx (o naturale del bbox)

    // faccia

    // diventare TRectD() non vuoto!!

    getBBox(frame, bbox, info);

    enlargeToI(bbox);

    TRectD interestingRect(rect * bbox);

    if (myIsEmpty(interestingRect)) return;

    // Declare the tile to the tiles manager

    ResourceBuilder::declareResource(alias, this, interestingRect, frame, info);

    doDryCompute(interestingRect, frame, info);

  } else {

    TRectD bbox;

    getBBox(frame, bbox, info);

    enlargeToI(bbox);

    TRectD interestingRect(rect * bbox);

    if (myIsEmpty(interestingRect)) return;

    // Invoke the fx-specific simulation process

    FxResourceBuilder rBuilder(alias, this, info, frame);

    rBuilder.simBuild(interestingRect);

  }

}

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

//! Declares the computation scheme of this fx for rendering optimization

//! purposes.

//! This is an important function of the Toonz rendering API, and should be

//! reimplemented

//! with the necessary care.

//! The Toonz rendering process makes use of this function to enact most of the

//! optimization steps about the fx computation, in particular fx caching.

//! A correct implementation of this method should follow these rules:

//! 
 The invocation of child node computations should be faithfully

//! reproduced.

//! 
 TRasterFx::compute and TRasterFx::allocateAndCompute calls have to be

//!      translated to TRasterFx::dryCompute calls.

//! 
 This fx is intended for precomputation stage, so the hard rendering

//! code

//!      should be skipped here.

//! By default, this method raises a dryCompute call to each input port in

//! increasing

//! order, using the TRasterFx::transform method to identify the tiles to be

//! passed

//! on input precomputation.

void TRasterFx::doDryCompute(TRectD &rect, double frame,

                             const TRenderSettings &info) {

  int inputPortCount = getInputPortCount();

  for (int i = 0; i < inputPortCount; ++i) {

    TFxPort *port = getInputPort(i);

    if (port->isConnected()) {

      TRectD rectOnInput;

      TRenderSettings infoOnInput;

      TRasterFxP fx = port->getFx();

      transform(frame, i, rect, info, rectOnInput, infoOnInput);

      if (!myIsEmpty(rectOnInput))

        fx->dryCompute(rectOnInput, frame, infoOnInput);

    }

  }

}

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

//! This is an overloaded member function that deals with

//! the allocation of an input tile before invoking the TRasterFx::compute

//! method on it.

void TRasterFx::allocateAndCompute(TTile &tile, const TPointD &pos,

                                   const TDimension &size, TRasterP templateRas,

                                   double frame, const TRenderSettings &info) {

  if (templateRas) {

    TRaster32P ras32(templateRas);

    TRaster64P ras64(templateRas);

    templateRas = 0;  // Release the reference to templateRas before allocation

    TRasterP tileRas;

    if (ras32)

      tileRas = TRaster32P(size.lx, size.ly);

    else if (ras64)

      tileRas = TRaster64P(size.lx, size.ly);

    else {

      assert(false);

      return;

    }

    tile.setRaster(tileRas);

  } else {

    if (info.m_bpp == 32) {

      TRaster32P tileRas(size.lx, size.ly);

      tile.setRaster(tileRas);

    } else if (info.m_bpp == 64) {

      TRaster64P tileRas(size.lx, size.ly);

      tile.setRaster(tileRas);

    } else

      assert(false);

  }

  tile.m_pos = pos;

  compute(tile, frame, info);

}

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

//! This method supplies the actual fx rendering code.

void TRasterFx::compute(TTile &tile, double frame,

                        const TRenderSettings &info) {

  // If the render was aborted, avoid everything

  // if(TRenderer::instance().isAborted(TRenderer::renderId()))

  //  throw TException("Render canceled");

  if (checkActiveTimeRegion() && !getActiveTimeRegion().contains(frame)) return;

  if (!getAttributes()->isEnabled() || !m_rasFxImp->isEnabled()) {

    if (getInputPortCount() == 0) return;

    TFxPort *port = getInputPort(0);

    // la porta 0 non deve essere una porta di controllo

    assert(port->isaControlPort() == false);

    if (port->isConnected()) {

      TRasterFxP(port->getFx())->compute(tile, frame, info);

      return;

    }

    return;

  }

  // If the input tile has a fractionary position, it is passed to the

  // rendersettings' accumulated affine. At the same time, the integer part of

  // such affine is transferred to the tile.

  TPoint intTilePos(tfloor(tile.m_pos.x), tfloor(tile.m_pos.y));

  TPointD fracTilePos(tile.m_pos.x - intTilePos.x, tile.m_pos.y - intTilePos.y);

  TPointD fracInfoTranslation(info.m_affine.a13 - fracTilePos.x,

                              info.m_affine.a23 - fracTilePos.y);

  TPoint intInfoTranslation(tfloor(fracInfoTranslation.x),

                            tfloor(fracInfoTranslation.y));

  TPointD newTilePos(intTilePos.x - intInfoTranslation.x,

                     intTilePos.y - intInfoTranslation.y);

  /*-- 入力タイルの位置が、小数値を持っていた場合 --*/

  if (tile.m_pos != newTilePos) {

    /*-- RenderSettingsのaffine行列に位置ずれを足しこむ --*/

    TRenderSettings newInfo(info);

    newInfo.m_affine.a13 = fracInfoTranslation.x - intInfoTranslation.x;

    newInfo.m_affine.a23 = fracInfoTranslation.y - intInfoTranslation.y;

    /*-- タイルの位置は整数値にする --*/

    TPointD oldPos(tile.m_pos);

    tile.m_pos = newTilePos;

    compute(tile, frame, newInfo);

    tile.m_pos = oldPos;

    return;

  }

  bool canHandleAffine =

      canHandle(info, frame) || (handledAffine(info, frame) == info.m_affine);

  if (!info.m_affine.isIdentity() && !canHandleAffine) {

    TrFx *transformerFx = new TrFx;

    TFxP locker(transformerFx);

    transformerFx->setFx(this);

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

    return;

  }

  // Retrieve tile's geometry

  TRectD tilePlacement = myConvert(tile.getRaster()->getBounds()) + tile.m_pos;

  // Build the fx result alias (in other words, its name)

  std::string alias = getAlias(frame, info) + "[" + ::traduce(info.m_affine) +

                      "][" + std::to_string(info.m_bpp) +

                      "]";  // To be moved below

  TRectD bbox;

  getBBox(frame, bbox, info);

  enlargeToI(bbox);

  TRectD interestingRect(tilePlacement * bbox);

  if (myIsEmpty(interestingRect)) return;

  // Extract the interesting tile from requested one

  TTile interestingTile;

  interestingTile.m_pos = interestingRect.getP00();

  TRect interestingRectI(myConvert(interestingRect - tilePlacement.getP00()));

  interestingTile.setRaster(tile.getRaster()->extract(interestingRectI));