SuperImposeScalerOutput.hh

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#ifndef SUPERIMPOSESCALEROUTPUT_HH
#define SUPERIMPOSESCALEROUTPUT_HH
 
#include "ScalerOutput.hh"
#include "PixelOperations.hh"
#include <span>
 
namespace openmsx {
 
class RawFrame;
 
template<std::unsigned_integral Pixel>
class SuperImposeScalerOutput final : public ScalerOutput<Pixel>
{
public:
        SuperImposeScalerOutput(ScalerOutput<Pixel>& output,
                                const RawFrame& superImpose_,
                                const PixelOperations<Pixel>& pixelOps_);
 
        [[nodiscard]] unsigned getWidth()  const override;
        [[nodiscard]] unsigned getHeight() const override;
        void frameStart() override {}
        void frameStop() override {}
        [[nodiscard]] std::span<Pixel> acquireLine(unsigned y) override;
        void releaseLine(unsigned y, std::span<Pixel> buf)  override;
        void fillLine   (unsigned y, Pixel color) override;
 
private:
        [[nodiscard]] std::span<const Pixel> getSrcLine(unsigned y, std::span<Pixel> buf);
 
private:
        ScalerOutput<Pixel>& output;
        const RawFrame& superImpose;
        const PixelOperations<Pixel> pixelOps;
};
 
} // namespace openmsx
 
#endif