RawFrame.hh

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#ifndef RAWFRAME_HH
#define RAWFRAME_HH
 
#include "FrameSource.hh"
#include "MemBuffer.hh"
 
#include <bit>
#include <cassert>
#include <cstdint>
 
namespace openmsx {
 
class RawFrame final : public FrameSource
{
public:
        using Pixel = uint32_t;
 
        RawFrame(unsigned maxWidth, unsigned height);
 
        [[nodiscard]] std::span<Pixel> getLineDirect(unsigned y) {
                assert(y < getHeight());
                return {std::bit_cast<Pixel*>(data.data() + y * pitch), maxWidth};
        }
 
        [[nodiscard]] unsigned getLineWidthDirect(unsigned y) const {
                assert(y < getHeight());
                return lineWidths[y];
        }
 
        inline void setLineWidth(unsigned line, unsigned width) {
                assert(line < getHeight());
                assert(width <= maxWidth);
                lineWidths[line] = width;
        }
 
        inline 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]] const void* getLineInfo(
                unsigned line, unsigned& width,
                void* buf, unsigned bufWidth) const override;
        [[nodiscard]] bool hasContiguousStorage() const override;
 
private:
        MemBuffer<char, 64> data;
        MemBuffer<unsigned> lineWidths;
        unsigned maxWidth;
        unsigned pitch;
};
 
} // namespace openmsx
 
#endif