system: keep error dialogs open until dismissed

src/graphics/presentation/systemOverlay.h

@@ -0,0 +1,42 @@
+#ifndef EMULATOR_SRC_GRAPHICS_PRESENTATION_SYSTEMOVERLAY_H_
+#define EMULATOR_SRC_GRAPHICS_PRESENTATION_SYSTEMOVERLAY_H_
+
+#include "common/common.h"
+#include "graphics/host_gpu/vulkanCommon.h"
+
+#include <memory>
+
+union SDL_Event;
+
+namespace Libs::Graphics {
+
+struct GraphicContext;
+
+struct SystemOverlayVisualState {
+	bool     active;
+	uint64_t revision;
+};
+
+void                     InitializeSystemOverlayInput();
+void                     ShutdownSystemOverlayInput();
+bool                     ProcessSystemOverlayInput(const SDL_Event& event);
+SystemOverlayVisualState GetSystemOverlayVisualState() noexcept;
+
+class SystemOverlay final {
+public:
+	explicit SystemOverlay(GraphicContext& graphics);
+	~SystemOverlay();
+	KYTY_CLASS_NO_COPY(SystemOverlay);
+
+	[[nodiscard]] bool PrepareFrame(vk::Extent2D extent, vk::Format format, uint32_t image_count);
+	void               Record(vk::CommandBuffer command, vk::ImageView target);
+	void               ReleaseVulkan();
+
+private:
+	struct Impl;
+	std::unique_ptr<Impl> m_impl;
+};
+
+} // namespace Libs::Graphics
+
+#endif // EMULATOR_SRC_GRAPHICS_PRESENTATION_SYSTEMOVERLAY_H_