#include "texception.h"
#include "tfxparam.h"
#include "stdfx.h"
#include "tspectrumparam.h"
#include "tparamuiconcept.h"

#undef max
//===================================================================

class SquareGradientFx : public TStandardZeraryFx
{
	FX_PLUGIN_DECLARATION(SquareGradientFx)
	TSpectrumParamP m_colors;
	TDoubleParamP m_size;

public:
	SquareGradientFx()
		: m_size(200.0)
	{
		m_size->setMeasureName("fxLength");
		TSpectrum::ColorKey colors[] = {
			TSpectrum::ColorKey(0, TPixel32::White),
			//TSpectrum::ColorKey(0.5,TPixel32::Yellow),
			TSpectrum::ColorKey(1, TPixel32::Red)};
		m_colors = TSpectrumParamP(tArrayCount(colors), colors);
		bindParam(this, "colors", m_colors);
		bindParam(this, "size", m_size);
		m_size->setValueRange(0, std::numeric_limits<double>::max());
	}
	~SquareGradientFx(){};

	bool doGetBBox(double, TRectD &bBox, const TRenderSettings &info)
	{
		bBox = TConsts::infiniteRectD;
		return true;
	};
	void doCompute(TTile &tile, double frame, const TRenderSettings &ri);
	bool canHandle(const TRenderSettings &info, double frame) { return true; }

	void getParamUIs(TParamUIConcept *&concepts, int &length)
	{
		concepts = new TParamUIConcept[length = 1];

		concepts[0].m_type = TParamUIConcept::DIAMOND;
		concepts[0].m_label = "Size";
		concepts[0].m_params.push_back(m_size);
	}
};

template <typename PIXEL>
void doSquareGradient(const TRasterPT<PIXEL> &ras, const TSpectrumT<PIXEL> &spectrum, TPointD &posTrasf, TAffine aff, double size)
{
	PIXEL outpixel = spectrum.getPremultipliedValue(1.);
	int j;
	ras->lock();
	for (j = 0; j < ras->getLy(); j++) {
		TPointD posAux = posTrasf;
		TPointD fp;
		PIXEL *pix = ras->pixels(j);
		PIXEL *endPix = pix + ras->getLx();
		while (pix < endPix) {
			double s;
			fp.x = fabs(posAux.x) / size;
			fp.y = fabs(posAux.y) / size;
			if ((fp.x + fp.y) < 1) {
				s = fp.x + fp.y;
				*pix++ = spectrum.getPremultipliedValue(s);
			} else
				*pix++ = outpixel;
			posAux.x += aff.a11;
			posAux.y += aff.a21;
		}
		posTrasf.x += aff.a12;
		posTrasf.y += aff.a22;
	}
	ras->unlock();
}

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

void SquareGradientFx::doCompute(TTile &tile, double frame,
								 const TRenderSettings &ri)
{
	double size = m_size->getValue(frame) / ri.m_shrinkX;

	;
	TAffine aff = ri.m_affine.inv();
	TPointD posTrasf = aff * tile.m_pos;

	if (TRaster32P raster32 = tile.getRaster())
		doSquareGradient<TPixel32>(
			raster32,
			m_colors->getValue(frame),
			posTrasf, aff, size);
	else if (TRaster64P raster64 = tile.getRaster())
		doSquareGradient<TPixel64>(
			raster64,
			m_colors->getValue64(frame),
			posTrasf, aff, size);
	else
		throw TException("SquareGradientFx: unsupported Pixel Type");
}

FX_PLUGIN_IDENTIFIER(SquareGradientFx, "squareGradientFx");