do it, ugly

ui/CMakeLists.txt

@@ -1,12 +1,12 @@
 include(impl.cmake)
 
-qt_add_executable(PROJECT-NAME
+qt_add_library(PROJECT_NAME_ui STATIC
 	src/main.cxx
 	src/main_window.cxx
 	src/main_window.ui
 	src/viewport.cxx
 )
 
-target_link_libraries(PROJECT-NAME PRIVATE Qt6::Gui Qt6::Widgets)
-target_link_libraries(PROJECT-NAME PRIVATE PROJECT_NAME_impl)
-target_include_directories(PROJECT-NAME PRIVATE src)
+target_link_libraries(PROJECT_NAME_ui PRIVATE Qt6::Gui Qt6::Widgets)
+target_link_libraries(PROJECT_NAME_ui PRIVATE PROJECT_NAME_impl)
+target_include_directories(PROJECT_NAME_ui PRIVATE src)

ui/Cargo.toml

@@ -3,9 +3,6 @@ name = "PROJECT-NAME-impl"
 version = "0.1.0"
 edition = "2024"
 
-[lib]
-crate-type = ["staticlib"]
-
 [dependencies]
 PROJECT-NAME = {path = "../"}
 

ui/build.rs

@@ -0,0 +1,7 @@
+fn main() {
+	println!("cargo::rustc-link-search=native=build/ui");
+	println!("cargo::rustc-link-lib=dylib=Qt6Core");
+	println!("cargo::rustc-link-lib=dylib=Qt6Gui");
+	println!("cargo::rustc-link-lib=dylib=Qt6Widgets");
+	println!("cargo::rustc-link-lib=dylib=stdc++");
+}

ui/src/api.hxx

@@ -43,7 +43,7 @@ public:
 	virtual void redraw(const RedrawArgs& args) = 0;
 };
 
-class ICoreFactory : public IBoxed {
+class ICoreFactory {
 private:
 	virtual ICore* new_xcb(xcb_connection_t* connection, std::uint32_t window, std::uint32_t width, std::uint32_t height) const = 0;
 

ui/src/lib.rs

@@ -1,12 +1,12 @@
-use std::{ffi::c_void, num::NonZero, ptr::NonNull};
+use PROJECT_NAME::{Core, init_gpu_inner};
+use glam::UVec2;
+use raw_window_handle::{RawDisplayHandle, RawWindowHandle};
 
-use PROJECT_NAME::{Core, RedrawArgs, init_gpu_inner};
-use glam::{UVec2, uvec2};
-use raw_window_handle::{RawDisplayHandle, RawWindowHandle, XcbDisplayHandle, XcbWindowHandle};
+use crate::core::ICoreImpl;
 
-use crate::vtable::ICoreImpl;
+pub use factory::ICoreFactoryImpl;
 
-mod vtable {
+mod core {
 	use std::ops::{Deref, DerefMut};
 
 	use PROJECT_NAME::{Core, RedrawArgs};
@@ -32,9 +32,9 @@ mod vtable {
 	}
 
 	static VTABLE: ICoreVTable = ICoreVTable {
-		destroy: destroy,
-		configure: configure,
-		redraw: redraw,
+		destroy,
+		configure,
+		redraw,
 	};
 
 	#[repr(C)]
@@ -67,6 +67,51 @@ mod vtable {
 	}
 }
 
+mod factory {
+	use std::{ffi::c_void, num::NonZero, ptr::NonNull};
+
+	use glam::uvec2;
+	use raw_window_handle::{XcbDisplayHandle, XcbWindowHandle};
+
+	use crate::core::ICoreImpl;
+
+	#[repr(C)]
+	struct ICoreFactoryVTable {
+		new_xcb: unsafe extern "C" fn(
+			this: &mut ICoreFactoryImpl,
+			connection: NonNull<c_void>,
+			window: NonZero<u32>,
+			width: u32,
+			height: u32,
+		) -> Box<ICoreImpl>,
+	}
+
+	unsafe extern "C" fn new_xcb(
+		_this: &mut ICoreFactoryImpl,
+		connection: NonNull<c_void>,
+		window: NonZero<u32>,
+		width: u32,
+		height: u32,
+	) -> Box<ICoreImpl> {
+		let display = XcbDisplayHandle::new(Some(connection), 0);
+		let window = XcbWindowHandle::new(window);
+		unsafe { crate::create_viewport(display, window, uvec2(width, height)) }
+	}
+
+	static VTABLE: ICoreFactoryVTable = ICoreFactoryVTable { new_xcb };
+
+	#[repr(C)]
+	pub struct ICoreFactoryImpl {
+		vtable: &'static ICoreFactoryVTable,
+	}
+
+	impl ICoreFactoryImpl {
+		pub fn new() -> Self {
+			ICoreFactoryImpl { vtable: &VTABLE }
+		}
+	}
+}
+
 unsafe fn create_viewport(
 	display: impl Into<RawDisplayHandle>,
 	window: impl Into<RawWindowHandle>,
@@ -82,15 +127,3 @@ unsafe fn create_viewport(
 	.unwrap();
 	ICoreImpl::new(Core::new(gpu, size))
 }
-
-#[unsafe(no_mangle)]
-unsafe extern "C" fn rt4_viewport_create(
-	connection: NonNull<c_void>,
-	window: NonZero<u32>,
-	width: u32,
-	height: u32,
-) -> Box<ICoreImpl> {
-	let display = XcbDisplayHandle::new(Some(connection), 0);
-	let window = XcbWindowHandle::new(window);
-	unsafe { create_viewport(display, window, uvec2(width, height)) }
-}

ui/src/main.cxx

@@ -14,18 +14,3 @@ extern "C" int run(int argc, char* argv[], ICoreFactory* factory) {
 
 	return app.exec();
 }
-
-extern "C" ICore* rt4_viewport_create(xcb_connection_t* connection, std::uint32_t window, std::uint32_t width, std::uint32_t height);
-
-class CoreFactory : public ICoreFactory {
-public:
-	void destroy() override {}
-	ICore* new_xcb(xcb_connection_t* connection, std::uint32_t window, std::uint32_t width, std::uint32_t height) const override {
-		return rt4_viewport_create(connection, window, width, height);
-	}
-};
-
-int main(int argc, char* argv[]) {
-	CoreFactory factory;
-	return run(argc, argv, &factory);
-}

ui/src/main.rs

@@ -0,0 +1,26 @@
+use std::ffi::{c_char, c_int};
+
+use PROJECT_NAME_impl::ICoreFactoryImpl;
+
+#[link(kind = "static", name = "PROJECT_NAME_ui")]
+unsafe extern "C" {
+	fn run(argc: c_int, argv: *mut *mut c_char, factory: &ICoreFactoryImpl) -> c_int;
+}
+
+fn main() {
+	let factory = ICoreFactoryImpl::new();
+	let mut args: Vec<_> = std::env::args().collect();
+	let mut argv: Vec<*mut c_char> = args
+		.iter_mut()
+		.map(|s| s.as_mut_ptr() as *mut c_char)
+		.collect();
+	argv.push(std::ptr::null_mut());
+	let exit_code = unsafe {
+		run(
+			args.len().try_into().expect("WAY too many arguments"),
+			argv.as_mut_ptr(),
+			&factory,
+		)
+	};
+	std::process::exit(exit_code);
+}