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// TnzCore includes
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#include "trop.h"
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// TnzBase includes
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#include "tfxparam.h"
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#include "tparamset.h"
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// TnzStdfx includes
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#include "stdfx.h"
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//****************************************************************************
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//    ErodeDilate Fx
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//****************************************************************************
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class ErodeDilateFx : public TStandardRasterFx
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{
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	FX_PLUGIN_DECLARATION(ErodeDilateFx)
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	TRasterFxPort m_input;
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	TIntEnumParamP m_type;
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	TDoubleParamP m_radius;
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public:
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	ErodeDilateFx()
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		: m_type(new TIntEnumParam(0, "Square")), m_radius(0.0)
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	{
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		addInputPort("Source", m_input);
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		bindParam(this, "type", m_type);
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		m_type->addItem(1, "Circular");
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		m_radius->setMeasureName("fxLength");
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		bindParam(this, "radius", m_radius);
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	}
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	bool doGetBBox(double frame, TRectD &bBox, const TRenderSettings &info);
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	void doDryCompute(TRectD &rect, double frame, const TRenderSettings &ri);
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	void doCompute(TTile &tile, double frame, const TRenderSettings &ri);
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	int getMemoryRequirement(const TRectD &rect, double frame, const TRenderSettings &info);
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	bool canHandle(const TRenderSettings &info, double frame)
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	{
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		return isAlmostIsotropic(info.m_affine);
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	}
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};
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//-------------------------------------------------------------------
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bool ErodeDilateFx::doGetBBox(double frame, TRectD &bBox, const TRenderSettings &info)
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{
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	//Remember: info.m_affine MUST NOT BE CONSIDERED in doGetBBox's implementation
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	//Retrieve the input bbox without applied affines.
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	if (!m_input.getFx())
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		return false;
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	bool ret = m_input->doGetBBox(frame, bBox, info);
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	bBox = bBox.enlarge(tceil(m_radius->getValue(frame)));
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	return ret;
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}
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//-------------------------------------------------------------------
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void ErodeDilateFx::doCompute(TTile &tile, double frame, const TRenderSettings &info)
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{
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	if (!m_input.isConnected())
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		return;
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	double radius = m_radius->getValue(frame) * sqrt(info.m_affine.det());
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	bool dilate = (radius >= 0.0);
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	TRop::ErodilateMaskType type = TRop::ErodilateMaskType(m_type->getValue());
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	if (dilate) {
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		// Quite easy, this time - just compute the input tile by forwarding the request
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		m_input->compute(tile, frame, info);
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		// Then, apply TRop::erodilate directly with the scale-adjusted radius
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		const TRasterP &ras = tile.getRaster();
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		TRop::erodilate(ras, ras, radius, type);
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	} else {
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		// In the erosion case, we need to know the input enlarged by the radius value
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		int radI = tceil(fabs(radius));
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		const TDimension &tileSize = tile.getRaster()->getSize();
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		const TRectD &enlargedRect = TRectD(tile.m_pos, TDimensionD(tileSize.lx, tileSize.ly)).enlarge(radI);
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		TDimension enlargedSize(tround(enlargedRect.getLx()), tround(enlargedRect.getLy()));
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		TTile inTile;
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		m_input->allocateAndCompute(inTile, enlargedRect.getP00(), enlargedSize, tile.getRaster(), frame, info);
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		const TRasterP &inRas = inTile.getRaster();
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		TRop::erodilate(inRas, inRas, radius, type);
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		tile.getRaster()->copy(inRas, -TPoint(radI, radI));
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	}
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}
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//-------------------------------------------------------------------
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void ErodeDilateFx::doDryCompute(TRectD &rect, double frame, const TRenderSettings &info)
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{
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	if (!m_input.isConnected())
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		return;
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	double radius = m_radius->getValue(frame) * sqrt(info.m_affine.det());
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	bool dilate = (radius >= 0.0);
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	if (dilate)
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		m_input->dryCompute(rect, frame, info);
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	else {
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		int radI = tceil(fabs(radius));
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		TRectD enlargedRect(rect.enlarge(radI));
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		m_input->dryCompute(enlargedRect, frame, info);
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	}
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}
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//------------------------------------------------------------------
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int ErodeDilateFx::getMemoryRequirement(const TRectD &rect, double frame, const TRenderSettings &info)
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{
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	return (m_type->getValue() == 0) ? TRasterFx::memorySize(rect, 8) : // One additional greymaps
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			   2 * TRasterFx::memorySize(rect, 8);						// Two additional greymaps
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}
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//------------------------------------------------------------------
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FX_PLUGIN_IDENTIFIER(ErodeDilateFx, "erodeDilateFx");