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◆ main openmsx / src / video / VideoSystem.hh
2.9 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#ifndef VIDEOSYSTEM_HH
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#define VIDEOSYSTEM_HH
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#include "gl_vec.hh"
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#include "zstring_view.hh"
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#include "components.hh"
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#include <memory>
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#include <optional>
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#include <string>
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namespace openmsx {
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class Rasterizer;
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class VDP;
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class V9990Rasterizer;
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class LDRasterizer;
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class V9990;
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class LaserdiscPlayer;
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class OutputSurface;
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/** Video back-end system.
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  */
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class VideoSystem
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{
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public:
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	virtual ~VideoSystem() = default;
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	/** Create the rasterizer selected by the current renderer setting.
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	  * Video systems that use a rasterizer must override this method.
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	  * @param vdp The VDP whose display will be rendered.
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	  * @return The rasterizer created.
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	  */
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	[[nodiscard]] virtual std::unique_ptr<Rasterizer> createRasterizer(VDP& vdp) = 0;
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	/** Create the V9990 rasterizer selected by the current renderer setting.
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	  * Video systems that use a rasterizer must override this method.
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	  * @param vdp The V9990 whose display will be rendered.
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	  * @return The rasterizer created.
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	  */
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	[[nodiscard]] virtual std::unique_ptr<V9990Rasterizer> createV9990Rasterizer(
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		V9990& vdp) = 0;
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#if COMPONENT_LASERDISC
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	[[nodiscard]] virtual std::unique_ptr<LDRasterizer> createLDRasterizer(
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		LaserdiscPlayer &ld) = 0;
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#endif
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	/** Finish pending drawing operations and make them visible to the user.
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	  */
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	virtual void flush() = 0;
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	/** Take a screenshot.
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	  * The default implementation throws an exception.
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	  * @param filename Name of the file to save the screenshot to.
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	  * @param withOsd Should OSD elements be included in the screenshot.
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	  * @throws MSXException If taking the screen shot fails.
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	  */
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	virtual void takeScreenShot(const std::string& filename, bool withOsd);
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	/** Called when the window title string has changed.
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	  */
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	virtual void updateWindowTitle();
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	/** Returns the current mouse pointer coordinates in the main window.
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	  * Returns std::nullopt when the main window does not have focus.
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	  */
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	[[nodiscard]] virtual std::optional<gl::ivec2> getMouseCoord() = 0;
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	/** Returns the size of a single MSX pixel as it is currently drawn on
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	  * screen, expressed in the same units as the mouse coordinates (SDL
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	  * window coordinates, which on high-DPI displays are not the same as
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	  * physical pixels).
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	  * Returns std::nullopt when there's no window to draw on.
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	  */
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	[[nodiscard]] virtual std::optional<gl::vec2> getMsxPixelSize() = 0;
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	/** TODO */
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	[[nodiscard]] virtual OutputSurface* getOutputSurface() = 0;
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	virtual void showCursor(bool show) = 0;
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	[[nodiscard]] virtual bool getCursorEnabled() = 0;
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	[[nodiscard]] virtual std::string getClipboardText() = 0;
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	virtual void setClipboardText(zstring_view text) = 0;
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	[[nodiscard]] virtual std::optional<gl::ivec2> getWindowPosition() = 0;
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	virtual void setWindowPosition(gl::ivec2 pos) = 0;
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	/** Requests a repaint of the output surface. An implementation might
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	 *  start a repaint directly, or trigger a queued rendering. */
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	virtual void repaint() = 0;
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protected:
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	VideoSystem() = default;
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};
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} // namespace openmsx
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#endif