// $Id: LowScaler.hh 5013 2006-01-05 23:45:08Z mthuurne $

#ifndef LOWSCALER_HH
#define LOWSCALER_HH

#include "Scaler.hh"
#include "PixelOperations.hh"

namespace openmsx {

template <typename Pixel>
class LowScaler : public Scaler
{
public:
	explicit LowScaler(const PixelOperations<Pixel>& pixelOps);

	void scaleBlank1to1(
		FrameSource& src, unsigned srcStartY, unsigned srcEndY,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scaleBlank2to1(
		FrameSource& src, unsigned srcStartY, unsigned srcEndY,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale2x1to3x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale2x2to3x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale1x1to1x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale1x2to1x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale4x1to3x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale4x2to3x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale2x1to1x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale2x2to1x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale8x1to3x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale8x2to3x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale4x1to1x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);
	void scale4x2to1x1(FrameSource& src,
		unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
		OutputSurface& dst, unsigned dstStartY, unsigned dstEndY);

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

private:
	PixelOperations<Pixel> pixelOps;
};

} // namespace openmsx

#endif