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◆ main openmsx / src / video / RawFrame.hh
1.5 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#ifndef RAWFRAME_HH
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#define RAWFRAME_HH
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#include "FrameSource.hh"
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#include "MemBuffer.hh"
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#include <cassert>
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namespace openmsx {
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/** A video frame as output by the VDP scanline conversion unit,
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  * before any postprocessing filters are applied.
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  */
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class RawFrame final : public FrameSource
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{
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public:
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	RawFrame(unsigned maxWidth, unsigned height);
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	[[nodiscard]] std::span<Pixel> getLineDirect(unsigned y) {
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		assert(y < getHeight());
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		return data.subspan(y * size_t(maxWidth), maxWidth);
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	}
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	[[nodiscard]] std::span<const Pixel> getLineDirect(unsigned y) const {
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		assert(y < getHeight());
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		return data.subspan(y * size_t(maxWidth), maxWidth);
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	}
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	[[nodiscard]] unsigned getLineWidthDirect(unsigned y) const {
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		assert(y < getHeight());
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		return lineWidths[y];
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	}
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	void setLineWidth(unsigned line, unsigned width) {
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		assert(line < getHeight());
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		assert(width <= maxWidth);
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		lineWidths[line] = width;
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	}
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	void setBlank(unsigned line, Pixel color) {
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		assert(line < getHeight());
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		getLineDirect(line)[0] = color;
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		lineWidths[line] = 1;
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	}
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private:
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	[[nodiscard]] unsigned getLineWidth(unsigned line) const override;
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	[[nodiscard]] std::span<const Pixel> getUnscaledLine(
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		unsigned line, std::span<Pixel> helpBuf) const override;
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	[[nodiscard]] bool hasContiguousStorage() const override;
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private:
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	MemBuffer<Pixel, 64> data; // aligned on cache-lines
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	MemBuffer<unsigned> lineWidths;
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	unsigned maxWidth; // may be larger (rounded up) than requested in the constructor
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};
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} // namespace openmsx
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#endif