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◆ main openmsx / src / video / v9990 / V9990BitmapConverter.hh
2.0 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#ifndef V9990BITMAPCONVERTER_HH
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#define V9990BITMAPCONVERTER_HH
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#include "V9990ModeEnum.hh"
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#include "one_of.hh"
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#include <cstdint>
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#include <span>
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namespace openmsx {
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class V9990;
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class V9990VRAM;
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/** Utility class to convert VRAM content to host pixels.
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  */
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class V9990BitmapConverter
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{
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public:
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	using Pixel = uint32_t;
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	V9990BitmapConverter(
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		V9990& vdp,
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		std::span<const Pixel,    64> palette64,  std::span<const int16_t,  64> palette64_32768,
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		std::span<const Pixel,   256> palette256, std::span<const int16_t, 256> palette256_32768,
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		std::span<const Pixel, 32768> palette32768);
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	/** Convert a line of VRAM into host pixels.
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	  */
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	void convertLine(std::span<Pixel> dst, unsigned x, unsigned y,
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		         int cursorY, bool drawCursors) const;
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	/** Set a different rendering mode.
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	  */
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	void setColorMode(V9990ColorMode colorMode_, V9990DisplayMode display) {
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		colorMode = colorMode_;
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		highRes = isHighRes(display);
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	}
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private:
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	[[nodiscard]] static bool isHighRes(V9990DisplayMode display) {
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		using enum V9990DisplayMode;
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		return display == one_of(B4, B5, B6, B7);
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	}
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private:
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	/** Reference to VDP
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	  */
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	V9990& vdp;
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	/** Reference to VDP VRAM
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	  */
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	V9990VRAM& vram;
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	/** The 64 color palette for P1, P2 and BP* modes
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	  * This is the palette manipulated through the palette port and register
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	  */
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	std::span<const Pixel, 64> const palette64;
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	std::span<const int16_t, 64> const palette64_32768;
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	/** The 256 color palette for BD8 mode
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	  * A fixed palette; sub-color space within the 32768 color palette
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	  */
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	std::span<const Pixel, 256> const palette256;
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	std::span<const int16_t, 256> const palette256_32768;
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	/** The 15-bits color palette for BD16, BYJK* and BYUV modes
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	  * This is the complete color space for the V9990
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	  */
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	std::span<const Pixel, 32768> const palette32768;
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	/** Remember last color and display mode. This is always the same as
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	  * vdp.getColorMode() and vdp.getDisplayMode() because these two only
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	  * change at the end of a display line.
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	  */
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	V9990ColorMode colorMode;
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	bool highRes;
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};
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} // namespace openmsx
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#endif