#include "stdfx.h"

#include "tfxparam.h"

#include "trop.h"

#include "warp.h"

#include "trasterfx.h"

//#include "timage_io.h"

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

class WarpFx : 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)

	{

		return isAlmostIsotropic(info.m_affine);

	}

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

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

	{

		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)

	{

		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)

	{

		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)

	{

		//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")