[oden] Move graphics thread off main thread

So we can do frame pacing a little bit better maybe.

game/main.ts

@@ -23,4 +23,5 @@ export function draw() {
     use_texture(the_texture);
     spr((320 - 256) / 2, 0, 256, 240, 0, 0);
   }
+  // print("FRAME TIME:", since_last_frame());
 }

src/lib.rs

@@ -1,12 +1,9 @@
 use bytemuck;
 use std::collections::HashMap;
+use std::sync::mpsc::Receiver;
+use std::time::Instant;
 use wgpu::util::DeviceExt;
-use winit::{
+use winit::{event::*, event_loop::EventLoop, window::Window, window::WindowBuilder};
-    event::*,
-    event_loop::{ControlFlow, EventLoop},
-    window::Window,
-    window::WindowBuilder,
-};
 
 mod script;
 use script::graphics::GraphicsCommand;
@@ -142,17 +139,12 @@ impl State {
             format: surface_format,
             width: size.width,
             height: size.height,
-            present_mode: surface_caps.present_modes[0],
+            present_mode: wgpu::PresentMode::Fifo,
             alpha_mode: surface_caps.alpha_modes[0],
             view_formats: vec![],
         };
         surface.configure(&device, &config);
 
-        // TODO: DELETE THIS
-        // let diffuse_bytes = include_bytes!("happy-tree.png");
-        // let diffuse_texture =
-        //     texture::Texture::from_bytes(&device, &queue, diffuse_bytes, "happy-tree.png").unwrap();
-
         let sprite_bind_group_layout =
             device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
                 entries: &[
@@ -475,78 +467,37 @@ impl State {
             self.queue.submit(std::iter::once(encoder.finish()));
         }
 
-        // {
-        //     // BEGIN GARBAGE
-        //     let r: f64 = (self.mouse_x / f64::from(self.size.width)).clamp(0.0, 1.0) * 0.1;
-        //     let g: f64 = (self.mouse_y / f64::from(self.size.height)).clamp(0.0, 1.0) * 0.2;
-        //     // END GARBAGE
-
-        //     let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
-        //         label: Some("Render Pass"),
-        //         color_attachments: &[Some(wgpu::RenderPassColorAttachment {
-        //             view: &view,
-        //             resolve_target: None,
-        //             ops: wgpu::Operations {
-        //                 load: wgpu::LoadOp::Clear(wgpu::Color {
-        //                     r, //0.1,
-        //                     g, //0.2,
-        //                     b: 0.3,
-        //                     a: 1.0,
-        //                 }),
-        //                 store: true,
-        //             },
-        //         })],
-        //         depth_stencil_attachment: None,
-        //     });
-
-        //     render_pass.set_pipeline(&self.render_pipeline);
-        //     render_pass.set_bind_group(0, &self.diffuse_bind_group, &[]);
-        //     render_pass.set_vertex_buffer(0, self.vertex_buffer.slice(..));
-        //     render_pass.set_index_buffer(self.index_buffer.slice(..), wgpu::IndexFormat::Uint16);
-        //     render_pass.draw_indexed(0..self.num_indices, 0, 0..1);
-        // }
-
         output.present();
 
         Ok(())
     }
 }
 
-pub async fn run() {
+struct UIEvent {
-    env_logger::init();
+    winit: Event<'static, ()>,
-    let event_loop = EventLoop::new();
+    #[allow(unused)]
-    let window = WindowBuilder::new().build(&event_loop).unwrap();
+    time: Instant,
+}
 
-    let mut state = State::new(window).await;
+// TODO: flume? (https://docs.rs/flume/latest/flume/)
 
+fn main_thread(state: State, reciever: Receiver<UIEvent>) {
+    let mut state = state;
     let mut context = script::ScriptContext::new();
     context.init();
 
-    event_loop.run(move |event, _, control_flow| {
+    loop {
-        control_flow.set_poll();
+        while let Ok(event) = reciever.try_recv() {
-
+            match event.winit {
-        match event {
                 Event::WindowEvent {
                     ref event,
                     window_id,
                 } if window_id == state.window().id() => {
                     if !state.input(event) {
                         match event {
-                        WindowEvent::CloseRequested
-                        | WindowEvent::KeyboardInput {
-                            input:
-                                KeyboardInput {
-                                    state: ElementState::Pressed,
-                                    virtual_keycode: Some(VirtualKeyCode::Escape),
-                                    ..
-                                },
-                            ..
-                        } => *control_flow = ControlFlow::Exit,
-
                             WindowEvent::CursorMoved { position, .. } => {
                                 state.mouse_x = position.x;
                                 state.mouse_y = position.y;
-                            state.window().request_redraw();
                             }
 
                             WindowEvent::Resized(physical_size) => {
@@ -563,7 +514,10 @@ pub async fn run() {
                     }
                 }
 
-            Event::RedrawRequested(window_id) if window_id == state.window().id() => {
+                _ => {}
+            }
+        }
+
         context.update();
         state.update();
 
@@ -572,19 +526,37 @@ pub async fn run() {
             // Reconfigure the surface if lost
             Err(wgpu::SurfaceError::Lost) => state.resize(state.size),
             // The system is out of memory, we should probably quit
-                    Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
+            Err(wgpu::SurfaceError::OutOfMemory) => panic!("Out of memory"),
             // All other errors (Outdated, Timeout) should be resolved by the next frame
             Err(e) => eprintln!("{:?}", e),
         }
-            }
 
-            Event::MainEventsCleared => {
+        // TODO: FRAME PACING.
-                // RedrawRequested will only trigger once, unless we manually
-                // request it.
-                state.window().request_redraw();
     }
+}
 
-            _ => {}
+pub async fn run() {
+    env_logger::init();
+    let event_loop = EventLoop::new();
+    let window = WindowBuilder::new().build(&event_loop).unwrap();
+
+    let state = State::new(window).await;
+    let (sender, reciever) = std::sync::mpsc::channel();
+
+    std::thread::spawn(move || {
+        main_thread(state, reciever);
+    });
+
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_poll();
+
+        if let Some(e) = event.to_static() {
+            sender
+                .send(UIEvent {
+                    winit: e,
+                    time: Instant::now(),
+                })
+                .unwrap();
         }
     });
 }