RawFrame.hh

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#ifndef RAWFRAME_HH
#define RAWFRAME_HH
 
#include "FrameSource.hh"
 
#include "MemBuffer.hh"
 
#include <cassert>
 
namespace openmsx {
 
class RawFrame final : public FrameSource
{
public:
        RawFrame(unsigned maxWidth, unsigned height);
 
        [[nodiscard]] std::span<Pixel> getLineDirect(unsigned y) {
                assert(y < getHeight());
                return {data.data() + y * size_t(maxWidth), maxWidth};
        }
        [[nodiscard]] std::span<const Pixel> getLineDirect(unsigned y) const {
                return const_cast<RawFrame*>(this)->getLineDirect(y);
        }
 
        [[nodiscard]] unsigned getLineWidthDirect(unsigned y) const {
                assert(y < getHeight());
                return lineWidths[y];
        }
 
        void setLineWidth(unsigned line, unsigned width) {
                assert(line < getHeight());
                assert(width <= maxWidth);
                lineWidths[line] = width;
        }
 
        void setBlank(unsigned line, Pixel color) {
                assert(line < getHeight());
                getLineDirect(line)[0] = color;
                lineWidths[line] = 1;
        }
 
private:
        [[nodiscard]] unsigned getLineWidth(unsigned line) const override;
        [[nodiscard]] std::span<const Pixel> getUnscaledLine(
                unsigned line, std::span<Pixel> helpBuf) const override;
        [[nodiscard]] bool hasContiguousStorage() const override;
 
private:
        MemBuffer<Pixel, 64> data; // aligned on cache-lines
        MemBuffer<unsigned> lineWidths;
        unsigned maxWidth; // may be larger (rounded up) than requested in the constructor
};
 
} // namespace openmsx
 
#endif