1 files changed, 202 insertions, 0 deletions
diff --git a/examples/doom/src/main.rs b/examples/doom/src/main.rs
new file mode 100644
index 0000000..095183d
--- /dev/null
+++ b/examples/doom/src/main.rs
@@ -0,0 +1,202 @@
+mod runtime;
+
+use std::num::NonZeroU32;
+use std::path::{Path, PathBuf};
+use std::rc::Rc;
+
+use eyre::{ContextCompat, Result, bail, eyre};
+use runtime::{Runtime, SCREEN_HEIGHT, SCREEN_WIDTH};
+use softbuffer::{Context as SoftbufferContext, Surface};
+use winit::application::ApplicationHandler;
+use winit::dpi::{LogicalSize, Size};
+use winit::event::{ElementState, WindowEvent};
+use winit::event_loop::{ActiveEventLoop, ControlFlow, EventLoop};
+use winit::keyboard::{KeyCode, PhysicalKey};
+use winit::window::{Window, WindowAttributes, WindowLevel};
+
+const GUEST_MODULE: &str = "examples/doom/out/puredoom.wasm";
+const DEFAULT_TITLE: &str = "tinywasm doom";
+
+fn main() -> Result<()> {
+    pretty_env_logger::init();
+
+    let wad_path = std::env::args().nth(1).map(PathBuf::from).context("usage: cargo run -p tinywasm-doom -- <wad>")?;
+    if !wad_path.exists() {
+        bail!("WAD not found: {}", wad_path.display());
+    }
+
+    let guest_path = Path::new(GUEST_MODULE);
+    if !guest_path.exists() {
+        bail!("guest module missing: {}. Run ./examples/doom/build.sh first", guest_path.display());
+    }
+
+    let event_loop = EventLoop::new()?;
+    let mut app = DoomApp::new(wad_path, guest_path.to_path_buf())?;
+    event_loop.run_app(&mut app)?;
+    Ok(())
+}
+
+struct DoomApp {
+    runtime: Runtime,
+    window: Option<Rc<Window>>,
+    softbuffer_context: Option<SoftbufferContext<Rc<Window>>>,
+    softbuffer_surface: Option<Surface<Rc<Window>, Rc<Window>>>,
+}
+
+impl DoomApp {
+    fn new(wad_path: PathBuf, guest_path: PathBuf) -> Result<Self> {
+        Ok(Self {
+            runtime: Runtime::new(wad_path, guest_path)?,
+            window: None,
+            softbuffer_context: None,
+            softbuffer_surface: None,
+        })
+    }
+
+    fn present(&mut self) -> Result<()> {
+        let Some(surface) = self.softbuffer_surface.as_mut() else {
+            return Ok(());
+        };
+
+        surface
+            .resize(NonZeroU32::new(SCREEN_WIDTH as u32).unwrap(), NonZeroU32::new(SCREEN_HEIGHT as u32).unwrap())
+            .map_err(|err| eyre!(err.to_string()))?;
+        let mut buffer = surface.buffer_mut().map_err(|err| eyre!(err.to_string()))?;
+        self.runtime.write_framebuffer(&mut buffer)?;
+        buffer.present().map_err(|err| eyre!(err.to_string()))?;
+        Ok(())
+    }
+}
+
+impl ApplicationHandler for DoomApp {
+    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+        event_loop.set_control_flow(ControlFlow::Poll);
+
+        let size = LogicalSize::new((SCREEN_WIDTH * 2) as f64, (SCREEN_HEIGHT * 2) as f64);
+
+        let attributes = WindowAttributes::default()
+            .with_title(DEFAULT_TITLE)
+            .with_inner_size(Size::Logical(size))
+            .with_resizable(false)
+            .with_window_level(if cfg!(target_os = "linux") { WindowLevel::AlwaysOnTop } else { WindowLevel::Normal });
+
+        let window = Rc::new(event_loop.create_window(attributes).expect("create window"));
+        let context = SoftbufferContext::new(window.clone()).expect("create softbuffer context");
+        let surface = Surface::new(&context, window.clone()).expect("create softbuffer surface");
+
+        self.softbuffer_context = Some(context);
+        self.softbuffer_surface = Some(surface);
+        self.window = Some(window.clone());
+        window.set_cursor_visible(false);
+        window.request_redraw();
+    }
+
+    fn window_event(&mut self, event_loop: &ActiveEventLoop, _window_id: winit::window::WindowId, event: WindowEvent) {
+        match event {
+            WindowEvent::CloseRequested => event_loop.exit(),
+            WindowEvent::RedrawRequested => {
+                if let Err(err) = self.present() {
+                    log::error!("present failed: {err:?}");
+                    event_loop.exit();
+                }
+            }
+            WindowEvent::KeyboardInput { event, .. } => {
+                if let Some(key) = doom_key(&event.physical_key) {
+                    let result = if matches!(event.state, ElementState::Pressed) {
+                        self.runtime.key_down(i32::from(key))
+                    } else {
+                        self.runtime.key_up(i32::from(key))
+                    };
+
+                    if let Err(err) = result {
+                        log::error!("keyboard event failed: {err:?}");
+                        event_loop.exit();
+                    }
+                }
+            }
+            _ => {}
+        }
+    }
+
+    fn about_to_wait(&mut self, event_loop: &ActiveEventLoop) {
+        if let Err(err) = self.runtime.tick() {
+            log::error!("doom tick failed: {err:?}");
+            event_loop.exit();
+            return;
+        }
+
+        if let Some(window) = &self.window {
+            window.request_redraw();
+        }
+
+        if self.runtime.host_state.borrow().exit_code.is_some() {
+            event_loop.exit();
+        }
+    }
+}
+
+fn doom_key(key: &PhysicalKey) -> Option<u8> {
+    let code = match key {
+        PhysicalKey::Code(KeyCode::Enter) => 13,
+        PhysicalKey::Code(KeyCode::Escape) => 27,
+        PhysicalKey::Code(KeyCode::ArrowLeft) => 0xac,
+        PhysicalKey::Code(KeyCode::ArrowRight) => 0xae,
+        PhysicalKey::Code(KeyCode::ArrowUp) => 0xad,
+        PhysicalKey::Code(KeyCode::ArrowDown) => 0xaf,
+        PhysicalKey::Code(KeyCode::ControlLeft | KeyCode::ControlRight) => 0x80 + 0x1d,
+        PhysicalKey::Code(KeyCode::ShiftLeft | KeyCode::ShiftRight) => 0xb6,
+        PhysicalKey::Code(KeyCode::AltLeft | KeyCode::AltRight) => 0xb8,
+        PhysicalKey::Code(KeyCode::Space) => b' ',
+        PhysicalKey::Code(KeyCode::F2) => 0x80 + 0x3c,
+        PhysicalKey::Code(KeyCode::F3) => 0x80 + 0x3d,
+        PhysicalKey::Code(KeyCode::F4) => 0x80 + 0x3e,
+        PhysicalKey::Code(KeyCode::F5) => 0x80 + 0x3f,
+        PhysicalKey::Code(KeyCode::F6) => 0x80 + 0x40,
+        PhysicalKey::Code(KeyCode::F7) => 0x80 + 0x41,
+        PhysicalKey::Code(KeyCode::F8) => 0x80 + 0x42,
+        PhysicalKey::Code(KeyCode::F9) => 0x80 + 0x43,
+        PhysicalKey::Code(KeyCode::F10) => 0x80 + 0x44,
+        PhysicalKey::Code(KeyCode::F11) => 0x80 + 0x57,
+        PhysicalKey::Code(KeyCode::Equal) => b'=',
+        PhysicalKey::Code(KeyCode::Minus) => b'-',
+        PhysicalKey::Code(KeyCode::KeyA) => b'a',
+        PhysicalKey::Code(KeyCode::KeyB) => b'b',
+        PhysicalKey::Code(KeyCode::KeyC) => b'c',
+        PhysicalKey::Code(KeyCode::KeyD) => b'd',
+        PhysicalKey::Code(KeyCode::KeyE) => b'e',
+        PhysicalKey::Code(KeyCode::KeyF) => b'f',
+        PhysicalKey::Code(KeyCode::KeyG) => b'g',
+        PhysicalKey::Code(KeyCode::KeyH) => b'h',
+        PhysicalKey::Code(KeyCode::KeyI) => b'i',
+        PhysicalKey::Code(KeyCode::KeyJ) => b'j',
+        PhysicalKey::Code(KeyCode::KeyK) => b'k',
+        PhysicalKey::Code(KeyCode::KeyL) => b'l',
+        PhysicalKey::Code(KeyCode::KeyM) => b'm',
+        PhysicalKey::Code(KeyCode::KeyN) => b'n',
+        PhysicalKey::Code(KeyCode::KeyO) => b'o',
+        PhysicalKey::Code(KeyCode::KeyP) => b'p',
+        PhysicalKey::Code(KeyCode::KeyQ) => b'q',
+        PhysicalKey::Code(KeyCode::KeyR) => b'r',
+        PhysicalKey::Code(KeyCode::KeyS) => b's',
+        PhysicalKey::Code(KeyCode::KeyT) => b't',
+        PhysicalKey::Code(KeyCode::KeyU) => b'u',
+        PhysicalKey::Code(KeyCode::KeyV) => b'v',
+        PhysicalKey::Code(KeyCode::KeyW) => b'w',
+        PhysicalKey::Code(KeyCode::KeyX) => b'x',
+        PhysicalKey::Code(KeyCode::KeyY) => b'y',
+        PhysicalKey::Code(KeyCode::KeyZ) => b'z',
+        PhysicalKey::Code(KeyCode::Digit0) => b'0',
+        PhysicalKey::Code(KeyCode::Digit1) => b'1',
+        PhysicalKey::Code(KeyCode::Digit2) => b'2',
+        PhysicalKey::Code(KeyCode::Digit3) => b'3',
+        PhysicalKey::Code(KeyCode::Digit4) => b'4',
+        PhysicalKey::Code(KeyCode::Digit5) => b'5',
+        PhysicalKey::Code(KeyCode::Digit6) => b'6',
+        PhysicalKey::Code(KeyCode::Digit7) => b'7',
+        PhysicalKey::Code(KeyCode::Digit8) => b'8',
+        PhysicalKey::Code(KeyCode::Digit9) => b'9',
+        _ => return None,
+    };
+
+    Some(code)
+}