Simple2xScaler.hh

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#ifndef SIMPLESCALER_HH
#define SIMPLESCALER_HH
 
#include "Scaler2.hh"
#include "Scanline.hh"
#include "Multiply32.hh"
 
namespace openmsx {
 
class RenderSettings;
 
template<std::unsigned_integral Pixel>
class Simple2xScaler final : public Scaler2<Pixel>
{
public:
        Simple2xScaler(
                const PixelOperations<Pixel>& pixelOps,
                RenderSettings& renderSettings);
 
private:
        void scaleImage(FrameSource& src, const RawFrame* superImpose,
                unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
                ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY) override;
        void scaleBlank1to2(
                FrameSource& src, unsigned srcStartY, unsigned srcEndY,
                ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY) override;
        void scale1x1to2x2(FrameSource& src,
                unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
                ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY) override;
        void scale1x1to1x2(FrameSource& src,
                unsigned srcStartY, unsigned srcEndY, unsigned srcWidth,
                ScalerOutput<Pixel>& dst, unsigned dstStartY, unsigned dstEndY) override;
 
        void drawScanline(std::span<const Pixel> in1, std::span<const Pixel> in2,
                          std::span<Pixel> out, int factor);
        void blur1on2(std::span<const Pixel> in, std::span<Pixel> out, unsigned alpha);
        void blur1on1(std::span<const Pixel> in, std::span<Pixel> out, unsigned alpha);
 
private:
        RenderSettings& settings;
        PixelOperations<Pixel> pixelOps;
 
        Multiply32<Pixel> mult1;
        Multiply32<Pixel> mult2;
        Multiply32<Pixel> mult3;
 
        Scanline<Pixel> scanline;
};
 
} // namespace openmsx
 
#endif