// $Id: Scale3xScaler.hh 5740 2006-10-03 16:51:29Z m9710797 $

#ifndef SCALE3XSCALER_HH
#define SCALE3XSCALER_HH

#include "Scaler3.hh"

namespace openmsx {

/** Runs the Scale3x scaler algorithm.
  */
template <class Pixel>
class Scale3xScaler: public Scaler3<Pixel>
{
public:
	explicit Scale3xScaler(const PixelOperations<Pixel>& pixelOps);

	virtual void scale1x1to3x3(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);

private:
	void scaleLine1on3Half(Pixel* dst,
		const Pixel* src0, const Pixel* src1, const Pixel* src2,
		unsigned srcWidth);
	void scaleLine1on3Mid (Pixel* dst,
		const Pixel* src0, const Pixel* src1, const Pixel* src2,
		unsigned srcWidth);
};

} // namespace openmsx

#endif