wip: convert from include style to module import style :D

modules/CMakeLists.txt

@@ -1,3 +1,11 @@
+add_library_module(NAME logger INTERFACES logger.cppm)
+add_library_module(NAME bitwise INTERFACES operations.cppm)
+add_library_module(NAME env INTERFACES constants.cppm)
+add_library_module(
+    NAME memory INTERFACES null_on_move.cppm reference.cppm scope.cppm
+)
+add_library_module(NAME time INTERFACES timer.cppm)
+
 add_library_module(
     NAME
     test
@@ -11,18 +19,6 @@ add_library_module(
     logger
 )
 
-add_library_module(NAME logger INTERFACES logger.cppm)
-
-add_library_module(NAME bitwise INTERFACES operations.cppm)
-
-add_library_module(NAME env INTERFACES constants.cppm)
-
-add_library_module(
-    NAME memory INTERFACES null_on_move.cppm reference.cppm scope.cppm
-)
-
-add_library_module(NAME time INTERFACES timer.cppm)
-
 add_library_module(
     NAME
     lt_debug
@@ -104,11 +100,36 @@ add_library_module(
     memory
 )
 
-if(NOT WIN32)
+if(WIN32)
     add_library_module(
         NAME
         surface
         INTERFACES
+        constants.cppm
+        system.cppm
+        requests.cppm
+        events.cppm
+        components.cppm
+        SOURCES
+        platform_windows.cpp
+        DEPENDENCIES
+        ecs
+        app
+        math
+        memory
+        tbb
+        PRIVATE_DEPENDENCIES
+        logger
+        lt_debug
+        time
+    )
+
+elseif(UNIX)
+    add_library_module(
+        NAME
+        surface
+        INTERFACES
+        constants.cppm
         system.cppm
         requests.cppm
         events.cppm
@@ -127,7 +148,9 @@ if(NOT WIN32)
         lt_debug
         time
     )
+
 else()
+    message(FATAL "Failed to generate cmake: unsupported platform")
 
 endif()
 
@@ -176,6 +199,8 @@ add_library_module(
     surface
 )
 
+return()
+
 add_library_module(
     NAME
     libmirror

modules/app/system.cppm

@@ -69,9 +69,9 @@ export class SystemStats
 public:
 	void push_diagnosis(SystemDiagnosis &&diagnosis)
 	{
-		auto diag = m_diagnosis.emplace_back(std::move(diagnosis));
+		auto &diag = m_diagnosis.emplace_back(std::move(diagnosis));
 
-		log::debug("message: {}", diag.message);
+		log::info("message: {}", std::string { diag.message });
 	}
 
 	[[nodiscard]] auto empty_diagnosis() const -> bool

modules/asset_baker/bakers.cppm

@@ -15,26 +15,24 @@ export void bake_shader(
 	using lt::assets::ShaderAsset;
 	using enum lt::assets::ShaderAsset::Type;
 
-	auto glsl_path = in_path.string();
+	auto glsl_path = std::string { in_path.string() };
 	auto spv_path = std::format("{}.spv", glsl_path);
 	lt::log::trace(
 	    "Compiling {} shader {} -> {}",
 	    type == vertex ? "vertex" : "fragment",
-	    glsl_path,
+	    std::string { glsl_path },
-	    spv_path
+	    std::string { spv_path }
 	);
 
 	// Don't bother linking to shaderc, just invoke the command with a system call.
 	// NOLINTNEXTLINE(concurrency-mt-unsafe)
-	std::system(
+	std::system(std::format(
-	    std::format(
+	                "glslc --target-env=vulkan1.4 -std=450core -fshader-stage={} {} -o {}",
-	        "glslc --target-env=vulkan1.4 -std=450core -fshader-stage={} {} -o {}",
+	                type == vertex ? "vert" : "frag",
-	        type == vertex ? "vert" : "frag",
+	                glsl_path,
-	        glsl_path,
+	                spv_path
-	        spv_path
+	)
-	    )
+	                .c_str());
-	        .c_str()
-	);
 
 	auto stream = std::ifstream(spv_path, std::ios::binary);
 	lt::debug::ensure(

modules/ecs/registry.cppm

@@ -251,11 +251,16 @@ private:
 
 	TypeId m_entity_count;
 
-	std::flat_map<TypeId, memory::Scope<UnderlyingSparseSet_T>> m_sparsed_sets;
+	/** MSVC DOES NOT SUPPORT FLAT MAP!!
+	 * IT"S YEAR ~2026, great...
+	 * using ::std::map for the time being.
+	 */
 
-	std::flat_map<TypeId, Callback_T> m_on_construct_hooks;
+	std::map<TypeId, memory::Scope<UnderlyingSparseSet_T>> m_sparsed_sets;
 
-	std::flat_map<TypeId, Callback_T> m_on_destruct_hooks;
+	std::map<TypeId, Callback_T> m_on_construct_hooks;
+
+	std::map<TypeId, Callback_T> m_on_destruct_hooks;
 };
 
 } // namespace lt::ecs

modules/logger/logger.cppm

@@ -52,7 +52,7 @@ struct [[maybe_unused]] print
 			// clang-format off
 			switch (level)
 			{
-			using enum Level;
+			using enum ::lt::log::Level;
 			case trace   : return "\033[1;37m| trc |\033[0m";
 			case debug   : return "\033[1;36m| dbg |\033[0m";
 			case info    : return "\033[1;32m| inf |\033[0m";
@@ -71,7 +71,7 @@ struct [[maybe_unused]] print
 		std::println(
 		    "{} {} ==> {}",
 		    to_string(level, location),
-		    std::format("{}:{}", path.filename().c_str(), location.line()),
+		    std::format("{}:{}", path.filename().string(), location.line()),
 		    std::format(format, std::forward<Args>(arguments)...)
 		);
 	}

modules/surface/components.cppm

@@ -1,6 +1,8 @@
 module;
-#ifdef LIGHT_PLATFORM_LINUX
+#if defined(LIGHT_PLATFORM_LINUX)
 typedef struct _XDisplay Display;
+#else defined(LIGHT_PLATFORM_WINDOWS)
+	#include <Windows.h>
 #endif
 
 export module surface.system:components;
@@ -38,13 +40,18 @@ public:
 	    ModifyPositionRequest,
 	    ModifyVisibilityRequest>;
 
-#ifdef LIGHT_PLATFORM_LINUX
+#if defined(LIGHT_PLATFORM_LINUX)
 	struct NativeData
 	{
 		Display *display;
 		std::uint32_t window;
 		unsigned long wm_delete_message;
 	};
+#elif defined(LIGHT_PLATFORM_WINDOWS)
+	struct NativeData
+	{
+		HWND window;
+	};
 #endif
 
 	static constexpr auto max_dimension = 4096;

modules/surface/constants.cppm

@@ -0,0 +1,7 @@
+export module surface.constants;
+
+export namespace lt::surface::constants {
+
+constexpr auto *class_name = "light_engine_window_class_name:3";
+
+}

modules/surface/platform_linux.cpp

@@ -75,7 +75,7 @@ System::~System()
 
 	try
 	{
-		// TODO(Light): make registry.remove not validate iterators
+		// TODO(Light): make registry.remove not invalidate iterators
 		auto entities_to_remove = std::vector<ecs::EntityId> {};
 		for (auto &[entity, surface] : m_registry->view<SurfaceComponent>())
 		{

modules/surface/platform_windows.cpp

@@ -1,139 +1,508 @@
-#include <memory/reference.hpp>
+module;
-#include <surface/system.hpp>
+#include <Windows.h>
-#include <utility>
+module surface.system;
+import surface.constants;
+import debug.assertions;
+import memory.reference;
+import surface.requests;
+import surface.events;
+import logger;
+import ecs.registry;
+import ecs.entity;
+import time;
+import std;
 
 namespace lt::surface {
 
-System::System(memory::Ref<ecs::Registry> registry, memory::Ref<app::EventMediator> event_mediator)
+template<class... Ts>
-    : m_registry(std::move(registry))
+struct overloads: Ts...
-    , m_event_mediator(std::move(event_mediator))
 {
-	ensure(m_registry, "Failed to initialize surface system: null registry");
+	using Ts::operator()...;
+};
 
-	ensure(
+void ensure_component_sanity(const SurfaceComponent &component);
-	    m_registry->view<SurfaceComponent>().size() == 0,
+
+auto CALLBACK native_window_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) -> LRESULT;
+
+System::System(memory::Ref<ecs::Registry> registry): m_registry(std::move(registry))
+{
+	debug::ensure(m_registry, "Failed to initialize surface system: null registry");
+
+	debug::ensure(
+	    m_registry->view<SurfaceComponent>().get_size() == 0,
 	    "Failed to initialize surface system: registry has surface component(s)"
 	);
 
-	m_registry->get_entt_registry()
+	m_registry->connect_on_destruct<SurfaceComponent>(
-	    .on_construct<SurfaceComponent>()
+	    [this](ecs::Registry &registry, ecs::EntityId entity) {
-	    .connect<&System::on_surface_construct>(this);
+		    on_surface_destruct(registry, entity);
+	    }
+	);
 
-	m_registry->get_entt_registry()
+	auto window_class = WNDCLASS {
-	    .on_update<SurfaceComponent>()
+		.lpfnWndProc = native_window_proc,
-	    .connect<&System::on_surface_update>(this);
+		.hInstance = GetModuleHandle(nullptr),
-
+		.lpszClassName = constants::class_name,
-	m_registry->get_entt_registry()
+	};
-	    .on_destroy<SurfaceComponent>()
+	RegisterClass(&window_class);
-	    .connect<&System::on_surface_destroy>(this);
 }
 
 System::~System()
 {
-	m_registry->get_entt_registry()
+	if (!m_registry)
-	    .on_construct<SurfaceComponent>()
+	{
-	    .disconnect<&System::on_surface_construct>(this);
+		return;
+	}
 
-	m_registry->get_entt_registry()
-	    .on_update<SurfaceComponent>()
-	    .connect<&System::on_surface_update>(this);
-
-	m_registry->get_entt_registry()
-	    .on_destroy<SurfaceComponent>()
-	    .disconnect<&System::on_surface_destroy>(this);
-
-
-	m_registry->view<SurfaceComponent>().each([&](const entt::entity entity, SurfaceComponent &) {
-		m_registry->get_entt_registry().remove<SurfaceComponent>(entity);
-	});
-}
-
-void System::on_surface_construct(entt::registry &registry, entt::entity entity)
-{
 	try
 	{
-		auto &surface = registry.get<SurfaceComponent>(entity);
+		// TODO(Light): make registry.remove not invalidate iterators
-		const auto &resolution = surface.get_resolution();
+		auto entities_to_remove = std::vector<ecs::EntityId> {};
-		const auto &position = surface.get_position();
+		for (auto &[entity, surface] : m_registry->view<SurfaceComponent>())
-		ensure_component_sanity(surface);
+		{
+			entities_to_remove.emplace_back(entity);
+		}
+
+		for (auto entity : entities_to_remove)
+		{
+			m_registry->remove<SurfaceComponent>(entity);
+		}
+
+		m_registry->disconnect_on_construct<SurfaceComponent>();
+		m_registry->disconnect_on_destruct<SurfaceComponent>();
 	}
-	catch (...)
+	catch (const std::exception &exp)
 	{
-		registry.remove<SurfaceComponent>(entity);
+		log::error("Uncaught exception in surface::~System:");
-		throw;
+		log::error("\twhat: {}", exp.what());
 	}
 }
 
-void System::on_surface_update(entt::registry &registry, entt::entity entity)
+void System::on_register()
 {
-	auto &surface = registry.get<SurfaceComponent>(entity);
 }
 
-void System::on_surface_destroy(entt::registry &registry, entt::entity entity)
+void System::on_unregister()
 {
-	auto &surface = registry.get<SurfaceComponent>(entity);
 }
 
-void System::set_title(ecs::Entity entity, std::string_view new_title)
+void System::create_surface_component(ecs::EntityId entity, SurfaceComponent::CreateInfo info)
+try
 {
-	auto &surface = entity.get_component<SurfaceComponent>();
+	auto &component = m_registry->add<SurfaceComponent>(entity, info);
+	auto &surface = m_registry->get<SurfaceComponent>(entity);
+	const auto &resolution = surface.get_resolution();
+	const auto &position = surface.get_position();
+	ensure_component_sanity(surface);
 
-	surface.m_title = new_title;
+	surface.m_native_data.window = CreateWindowEx(
+	    0,
+	    constants::class_name,
+	    info.title.data(),
+	    WS_OVERLAPPEDWINDOW,
+	    CW_USEDEFAULT,
+	    CW_USEDEFAULT,
+	    CW_USEDEFAULT,
+	    CW_USEDEFAULT,
+	    nullptr,
+	    nullptr,
+	    GetModuleHandle(nullptr),
+	    nullptr
+	);
+	debug::ensure(surface.m_native_data.window, "Failed to create Windows surface component");
+
+	ShowWindow(surface.m_native_data.window, SW_NORMAL);
+
+	// TODO(Light): refactor "environment" into standalone module
+	// NOLINTNEXTLINE(concurrency-mt-unsafe)
+	// auto *display_env = std::getenv("DISPLAY");
+	// debug::ensure(display_env != nullptr, "DISPLAY env var not found!");
+	//
+	// auto *display = XOpenDisplay(display_env);
+	// debug::ensure(display, "Failed to open XDisplay with DISPLAY: {}", display_env);
+	//
+	// auto root_window = XDefaultRootWindow(display);
+	//
+	// auto border_width = 0;
+	// auto depth = std::int32_t { CopyFromParent };
+	// auto window_class = CopyFromParent;
+	// auto *visual = (Visual *)CopyFromParent;
+	//
+	// auto attribute_value_mask = CWBackPixel | CWEventMask;
+	// auto attributes = XSetWindowAttributes {
+	// 	.background_pixel = 0xffafe9af,
+	// 	.event_mask = all_events_mask,
+	// };
+	//
+	// typedef struct Hints
+	// {
+	// 	unsigned long flags;
+	// 	unsigned long functions;
+	// 	unsigned long decorations;
+	// 	long inputMode;
+	// 	unsigned long status;
+	// } Hints;
+	//
+	// auto main_window = XCreateWindow(
+	//     display,
+	//     root_window,
+	//     position.x,
+	//     position.y,
+	//     resolution.x,
+	//     resolution.y,
+	//     border_width,
+	//     depth,
+	//     window_class,
+	//     visual,
+	//     attribute_value_mask,
+	//     &attributes
+	// );
+	// surface.m_native_data.display = display;
+	// surface.m_native_data.window = main_window;
+	//
+	// surface.m_native_data.wm_delete_message = XInternAtom(display, "WM_DELETE_WINDOW", False);
+	// XSetWMProtocols(display, main_window, &surface.m_native_data.wm_delete_message, 1);
+	//
+	// // code to remove decoration
+	// auto hints = std::array<const unsigned char, 5> { 2, 0, 0, 0, 0 };
+	// const auto motif_hints = XInternAtom(display, "_MOTIF_WM_HINTS", False);
+	//
+	// XChangeProperty(
+	//     display,
+	//     surface.m_native_data.window,
+	//     motif_hints,
+	//     motif_hints,
+	//     32,
+	//     PropModeReplace,
+	//     hints.data(),
+	//     5
+	// );
+	//
+	// XMapWindow(display, main_window);
+	// XStoreName(display, main_window, surface.m_title.c_str());
+	// XFlush(display);
+	//
+	// if (!surface.is_visible())
+	// {
+	// 	XUnmapWindow(display, main_window);
+	// }
+}
+catch (const std::exception &exp)
+{
+	log::error("Exception thrown when on_constructing surface component");
+	log::error("\tentity: {}", std::uint32_t { entity });
+	log::error("\twhat: {}", exp.what());
+	m_registry->remove<SurfaceComponent>(entity);
 }
 
-auto System::tick() -> bool
+void System::on_surface_destruct(ecs::Registry &registry, ecs::EntityId entity)
 {
-	return false;
+	auto *window = registry.get<SurfaceComponent>(entity).get_native_data().window;
-}
+	if (!window)
-
-void System::set_size(ecs::Entity surface_entity, const math::uvec2 &new_size)
-{
-	auto &surface = surface_entity.get_component<SurfaceComponent>();
-	surface.m_resolution = new_size;
-}
-
-void System::set_v_sync(ecs::Entity surface_entity, bool vsync)
-{
-	auto &surface = surface_entity.get_component<SurfaceComponent>();
-	surface.m_vsync = vsync;
-}
-
-void System::set_visibility(ecs::Entity surface_entity, bool visible)
-{
-	auto &surface = surface_entity.get_component<SurfaceComponent>();
-	surface.m_visible = visible;
-
-	if (visible)
-	{
-	}
-	else
 	{
+		log::warn("Surface component destroyed with null window handle");
+		return;
 	}
+
+	DestroyWindow(window);
 }
 
-void System::ensure_component_sanity(const SurfaceComponent &component)
+void System::handle_events(SurfaceComponent &surface)
+{
+	auto &queue = surface.m_event_queue;
+	queue.clear();
+
+	auto message = MSG {};
+	while (PeekMessage(&message, 0, {}, {}, PM_REMOVE))
+	{
+		switch (message.message)
+		{
+		}
+
+		log::debug("Window message type: {}", std::uint32_t { message.message });
+	}
+
+	// auto event = XEvent {};
+	// auto &[display, window, wm_delete_message] = surface.m_native_data;
+	//
+	// XFlush(display);
+	// while (XEventsQueued(display, QueuedAlready) != 0)
+	// {
+	// 	XNextEvent(surface.m_native_data.display, &event);
+	//
+	// 	switch (event.type)
+	// 	{
+	// 	case KeyPress:
+	// 	{
+	// 		queue.emplace_back<KeyPressedEvent>(
+	// 		    static_cast<std::uint32_t>(XLookupKeysym(&event.xkey, 0))
+	// 		);
+	// 		break;
+	// 	}
+	// 	case KeyRelease:
+	// 	{
+	// 		queue.emplace_back<KeyReleasedEvent>(
+	// 		    static_cast<std::uint32_t>(XLookupKeysym(&event.xkey, 0))
+	// 		);
+	// 		break;
+	// 	}
+	// 	case ButtonPress:
+	// 	{
+	// 		queue.emplace_back<ButtonPressedEvent>(static_cast<int>(event.xbutton.button));
+	// 		break;
+	// 	}
+	// 	case ButtonRelease:
+	// 	{
+	// 		queue.emplace_back<ButtonReleasedEvent>(static_cast<int>(event.xbutton.button));
+	// 		break;
+	// 	}
+	// 	case FocusIn:
+	// 	{
+	// 		queue.emplace_back<GainFocusEvent>({});
+	// 		break;
+	// 	}
+	// 	case FocusOut:
+	// 	{
+	// 		queue.emplace_back<LostFocusEvent>({});
+	// 		break;
+	// 	}
+	// 	case ClientMessage:
+	// 	{
+	// 		if (event.xclient.data.l[0] == wm_delete_message)
+	// 		{
+	// 			queue.emplace_back<ClosedEvent>({});
+	// 		}
+	//
+	// 		break;
+	// 	}
+	// 	case MotionNotify:
+	// 	{
+	// 		queue.emplace_back<MouseMovedEvent>(MouseMovedEvent {
+	// 		    static_cast<float>(event.xmotion.x),
+	// 		    static_cast<float>(event.xmotion.y),
+	// 		});
+	// 		break;
+	// 	}
+	// 	case ConfigureNotify:
+	// 	{
+	// 		const auto [prev_width, prev_height] = surface.get_resolution();
+	// 		const auto new_width = event.xconfigure.width;
+	// 		const auto new_height = event.xconfigure.height;
+	// 		if (prev_width != new_width || prev_height != new_height)
+	// 		{
+	// 			surface.m_resolution.x = new_width;
+	// 			surface.m_resolution.y = new_height;
+	// 			queue.emplace_back<ResizedEvent>(ResizedEvent {
+	// 			    static_cast<std::uint32_t>(new_width),
+	// 			    static_cast<std::uint32_t>(new_height),
+	// 			});
+	// 		}
+	//
+	// 		const auto [prev_x, prev_y] = surface.get_position();
+	// 		const auto new_x = event.xconfigure.x;
+	// 		const auto new_y = event.xconfigure.y;
+	// 		if (prev_x != new_x || prev_y != new_y)
+	// 		{
+	// 			surface.m_position.x = new_x;
+	// 			surface.m_position.y = new_y;
+	// 			queue.emplace_back<MovedEvent>(MovedEvent {
+	// 			    new_x,
+	// 			    new_y,
+	// 			});
+	// 		}
+	// 		break;
+	// 	}
+	//
+	// 	default: break; /* pass */
+	// 	}
+	// }
+}
+
+void System::handle_requests(SurfaceComponent &surface)
+{
+	const auto visitor = overloads {
+		[&](const ModifyTitleRequest &request) { modify_title(surface, request); },
+		[&](const ModifyResolutionRequest &request) { modify_resolution(surface, request); },
+		[&](const ModifyPositionRequest &request) { modify_position(surface, request); },
+		[&](const ModifyVisibilityRequest &request) { modify_visiblity(surface, request); },
+		[&](const auto &) { log::error("Unknown surface request"); },
+	};
+
+	for (const auto &request : surface.peek_requests())
+	{
+		std::visit(visitor, request);
+	}
+
+	surface.m_requests.clear();
+}
+
+void System::modify_title(SurfaceComponent &surface, const ModifyTitleRequest &request)
+{
+	surface.m_title = request.title;
+
+	// const auto &[display, window, _] = surface.get_native_data();
+	// XStoreName(display, window, request.title.c_str());
+}
+
+void System::modify_resolution(SurfaceComponent &surface, const ModifyResolutionRequest &request)
+{
+	// surface.m_resolution = request.resolution;
+
+	// auto &[display, window, _] = surface.m_native_data;
+	// const auto &[width, height] = request.resolution;
+	// // XResizeWindow(display, window, width, height);
+	//
+	// // get baseline serial number for X requests generated from XResizeWindow
+	// auto serial = NextRequest(display);
+	//
+	// // request a new window size from the X server
+	// XResizeWindow(
+	//     display,
+	//     window,
+	//     static_cast<std::uint32_t>(width),
+	//     static_cast<std::uint32_t>(height)
+	// );
+	//
+	// // flush output queue and wait for X server to processes the request
+	// XSync(display, False);
+	// // The documentation for XResizeWindow includes this important note:
+	// //
+	// //   If the override-redirect flag of the window is False and some
+	// //   other client has selected SubstructureRedirectMask on the parent,
+	// //   the X server generates a ConfigureRequest event, and no further
+	// //   processing is performed.
+	// //
+	// // What this means, essentially, is that if this window is a top-level
+	// // window, then it's the window manager (the "other client") that is
+	// // responsible for changing this window's size.  So when we call
+	// // XResizeWindow() on a top-level window, then instead of resizing
+	// // the window immediately, the X server informs the window manager,
+	// // and then the window manager sets our new size (usually it will be
+	// // the size we asked for).  We receive a ConfigureNotify event when
+	// // our new size has been set.
+	// constexpr auto lifespan = std::chrono::milliseconds { 10 };
+	// auto timer = time::Timer {};
+	// auto event = XEvent {};
+	// while (!XCheckIfEvent(
+	//            display,
+	//            &event,
+	//            XEventTypeEquals<ConfigureNotify>,
+	//            reinterpret_cast<XPointer>(&window) // NOLINT
+	//        )
+	//        || event.xconfigure.serial < serial)
+	// {
+	// 	std::this_thread::sleep_for(std::chrono::microseconds { 100 });
+	// 	if (timer.elapsed_time() > lifespan)
+	// 	{
+	// 		log::error("Timed out waiting for XResizeWindow's event");
+	// 		return;
+	// 	}
+	// }
+	// // We don't need to update the component's state and handle the event in this funcion.
+	// // Since handle_requests is called before handle_events.
+	// // So we just put the event back into the queue and move on.
+	// XPutBackEvent(display, &event);
+	// XSync(display, False);
+	// XFlush(display);
+}
+
+void System::modify_position(SurfaceComponent &surface, const ModifyPositionRequest &request)
+{
+	// surface.m_position = request.position;
+
+	// auto &[display, window, _] = surface.m_native_data;
+	// const auto &[x, y] = request.position;
+	//
+	// // get baseline serial number for X requests generated from XResizeWindow
+	// auto serial = NextRequest(display);
+	// XMoveWindow(display, window, static_cast<int>(x), static_cast<int>(y));
+	//
+	// // flush output queue and wait for X server to processes the request
+	// XSync(display, False);
+	// constexpr auto lifespan = std::chrono::milliseconds { 10 };
+	// auto timer = time::Timer {};
+	// auto event = XEvent {};
+	// while (!XCheckIfEvent(
+	//            display,
+	//            &event,
+	//            XEventTypeEquals<ConfigureNotify>,
+	//            reinterpret_cast<XPointer>(&window) // NOLINT
+	//        )
+	//        || event.xconfigure.serial < serial)
+	// {
+	// 	std::this_thread::sleep_for(std::chrono::microseconds { 100 });
+	// 	if (timer.elapsed_time() > lifespan)
+	// 	{
+	// 		log::error("Timed out waiting for XMoveWindow's event");
+	// 		return;
+	// 	}
+	// }
+	// // We don't need to update the component's state and handle the event in this funcion.
+	// // Since handle_requests is called before handle_events.
+	// // So we just put the event back into the queue and move on.
+	// XPutBackEvent(display, &event);
+	// XSync(display, False);
+	// XFlush(display);
+}
+
+void System::modify_visiblity(SurfaceComponent &surface, const ModifyVisibilityRequest &request)
+{
+	// const auto &[display, window, _] = surface.get_native_data();
+	// surface.m_visible = request.visible;
+
+	// if (request.visible)
+	// {
+	// 	XMapWindow(display, window);
+	// }
+	// else
+	// {
+	// 	XUnmapWindow(display, window);
+	// }
+}
+
+void System::tick(app::TickInfo tick)
+{
+	for (auto &[id, surface] : m_registry->view<SurfaceComponent>())
+	{
+		handle_requests(surface);
+		handle_events(surface);
+	}
+
+	const auto now = std::chrono::steady_clock::now();
+	m_last_tick_result = app::TickResult {
+		.info = tick,
+		.duration = now - tick.start_time,
+		.end_time = now,
+	};
+}
+
+void ensure_component_sanity(const SurfaceComponent &component)
 {
 	auto [width, height] = component.get_resolution();
 
-	ensure(width != 0u, "Received bad values for surface component: width({}) == 0", width);
+	debug::ensure(width != 0u, "Received bad values for surface component: width({}) == 0", width);
 
-	ensure(height != 0u, "Received bad values for surface component: height({}) == 0", height);
+	debug::ensure(
+	    height != 0u,
+	    "Received bad values for surface component: height({}) == 0",
+	    height
+	);
 
-	ensure(
+	debug::ensure(
 	    width < SurfaceComponent::max_dimension,
 	    "Received bad values for surface component: width({}) > max_dimension({})",
 	    width,
 	    SurfaceComponent::max_dimension
 	);
 
-	ensure(
+	debug::ensure(
 	    height < SurfaceComponent::max_dimension,
 	    "Received bad values for surface component: height({}) > max_dimension({})",
 	    height,
 	    SurfaceComponent::max_dimension
 	);
 
-	ensure(
+	debug::ensure(
 	    component.get_title().size() < SurfaceComponent::max_title_length,
 	    "Received bad values for surface component: title.size({}) > max_title_length({})",
 	    component.get_title().size(),
@@ -141,8 +510,18 @@ void System::ensure_component_sanity(const SurfaceComponent &component)
 	);
 }
 
+auto CALLBACK native_window_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) -> LRESULT
+{
+	switch (uMsg)
+	{
+	case WM_DESTROY:
+	{
+		PostQuitMessage(0);
+		return 0;
+	}
+	}
+
+	return DefWindowProcA(hwnd, uMsg, wParam, lParam);
+}
+
 } // namespace lt::surface
-
-namespace lt {
-
-} // namespace lt

modules/surface/system.test.cpp

@@ -11,7 +11,6 @@ import math.vec2;
 import app.system;
 import std;
 
-
 using ::lt::surface::SurfaceComponent;
 using ::lt::surface::System;
 using ::lt::test::Case;

tools/cmake/definitions.cmake

@@ -2,4 +2,6 @@ if(WIN32)
     add_compile_definitions(LIGHT_PLATFORM_WINDOWS)
 elseif(UNIX)
     add_compile_definitions(LIGHT_PLATFORM_LINUX)
+else()
+    message(FATAL "Failed to generate cmake: unsupported platform")
 endif()