#include "stdfx.h"
#include "tfxparam.h"
#include "trop.h"
 
class GammaFx : public TStandardRasterFx
{
	FX_PLUGIN_DECLARATION(GammaFx)
 
	TRasterFxPort m_input;
	TDoubleParamP m_gamma;
 
public:
	GammaFx()
		: m_gamma(1.0)
	{
		bindParam(this, "value", m_gamma);
		addInputPort("Source", m_input);
		//m_gamma->setValueRange(0, std::numeric_limits<double>::max());
		m_gamma->setValueRange(0.0, 200.0);
	}
 
	~GammaFx(){};
 
	bool doGetBBox(double frame, TRectD &bBox, const TRenderSettings &info)
	{
 
		if (m_input.isConnected())
			return m_input->doGetBBox(frame, bBox, info);
		else {
			bBox = TRectD();
			return false;
		}
	};
 
	void doCompute(TTile &tile, double frame, const TRenderSettings &);
 
	bool canHandle(const TRenderSettings &info, double frame) { return true; }
};
 
//-------------------------------------------------------------------
 
void GammaFx::doCompute(TTile &tile, double frame, const TRenderSettings &ri)
{
	if (!m_input.isConnected())
		return;
 
	m_input->compute(tile, frame, ri);
 
	double gamma = m_gamma->getValue(frame);
 
	if (gamma == 0.0)
		gamma = 0.01;
	TRop::gammaCorrect(tile.getRaster(), gamma);
}
 
//------------------------------------------------------------------
 
FX_PLUGIN_IDENTIFIER(GammaFx, "gammaFx")