I can haz UI?

mini-game/src/main.rs

@@ -5,8 +5,6 @@ use bevy::app::ScheduleRunnerPlugin;
 use bevy::camera::RenderTarget;
 use bevy::color::Color;
 use bevy::prelude::*;
-use bevy::render::RenderPlugin;
-use bevy::winit::WinitPlugin;
 use wgpu::{TextureFormat, TextureUsages};
 
 mod post_process;
@@ -21,19 +19,21 @@ mod shared;
 fn main() {
     App::new()
         .add_plugins((
-            DefaultPlugins
+            DefaultPlugins.set(WindowPlugin {
-                .set(RenderPlugin {
+                primary_window: Some(Window {
-                    synchronous_pipeline_compilation: true,
+                    resolution: bevy::window::WindowResolution::new(160 * 4, 43 * 4)
+                        .with_scale_factor_override(4.0),
                     ..default()
-                })
+                }),
-                .build()
+                ..default()
-                .disable::<WinitPlugin>(),
+            }),
             ScheduleRunnerPlugin::run_loop(Duration::from_secs_f64(1. / 30.)),
             post_process::PostProcessPlugin,
             ImageExportPlugin,
         ))
-        .insert_resource(ClearColor(Color::linear_rgba(0.0, 0.0, 0.0, 1.0)))
+        .insert_resource(ClearColor(Color::linear_rgba(0.0, 0.0, 0.0, 0.0)))
         .add_systems(Startup, setup_scene_system)
+        .add_systems(PostStartup, spawn_in_ui)
         .add_systems(Update, rotate_cube)
         .run();
 }
@@ -66,18 +66,44 @@ fn setup_scene_system(
         Camera::default(),
         RenderTarget::Image(image_handle.clone().into()),
         Transform::from_xyz(0.0, 1.0, 2.5).looking_at(Vec3::ZERO, Vec3::Y),
+        UiAntiAlias::Off,
         PostProcessSettings { scale: 1.0 },
     ));
 
     commands.spawn((ImageExport(export_sources.add(image_handle)),));
 }
 
+fn spawn_in_ui(mut commands: Commands, assets: Res<AssetServer>, camera: Query<(Entity, &Camera)>) {
+    let font: Handle<Font> = assets.load("fonts/Roboto-Bold.ttf");
+
+    let text_font = TextFont::from(font.clone())
+        .with_font_size(12.)
+        .with_font_smoothing(bevy::text::FontSmoothing::None);
+
+    let Ok(main_camera) = camera.single() else {
+        return; // no camera... yet?
+    };
+
+    commands.spawn((
+        Node {
+            position_type: PositionType::Absolute,
+            top: Val::Px(5.0),
+            left: Val::Px(5.0),
+            ..default()
+        },
+        Text::new("Hello World!"),
+        text_font.clone(),
+        TextColor(Color::WHITE),
+        UiTargetCamera(main_camera.0),
+    ));
+}
+
 fn rotate_cube(
     mut cubes: Query<(&mut Transform, &Spinner)>,
     timer: Res<Time>,
     g13: Res<G13Resource>,
 ) {
-    const DEADZONE: i32 = 30;
+    const DEADZONE: i32 = 35;
 
     let g13 = g13.g13.state();
     let mut x = g13.x as f32 / 512.0;

mini-game/src/post_process.rs

@@ -59,7 +59,7 @@ impl Plugin for PostProcessPlugin {
 }
 
 #[derive(Debug, Hash, PartialEq, Eq, Clone, RenderLabel)]
-struct PostProcessLabel;
+pub struct PostProcessLabel;
 
 #[derive(Default)]
 struct PostProcessNode;

mini-game/src/renderer/plugin.rs

@@ -14,9 +14,8 @@ use bevy::{
         texture::GpuImage,
     },
 };
-use embedded_graphics::pixelcolor::BinaryColor;
 use futures::channel::oneshot;
-use g13_driver::{G13, G13_LCD_BUF_SIZE};
+use g13_driver::G13;
 use wgpu::PollType;
 
 #[derive(Resource, Clone)]
@@ -141,25 +140,21 @@ fn save_buffer_to_disk(
                 image_bytes = unpadded_bytes;
             }
 
-            let mut img_buffer = [0u8; G13_LCD_BUF_SIZE as usize];
+            let mut img_buffer = [0u8; g13_driver::G13_LCD_BUF_SIZE as usize];
 
-            for (i, b) in image_bytes
+            for (i, rgba) in image_bytes.chunks(4).enumerate() {
-                .iter()
-                .step_by(4)
-                .take(G13_LCD_BUF_SIZE as usize * 8)
-                .enumerate()
-            {
                 let offset = i / 8;
                 let mask = 1 << (7 - (i % 8));
 
-                if *b == 0xFF {
+                if ((rgba[0] + rgba[1] + rgba[2]) / 3) > 0x08 {
                     img_buffer[offset] |= mask;
                 } else {
                     img_buffer[offset] &= !mask;
                 }
             }
 
-            use embedded_graphics::image::ImageDrawable;
+            use embedded_graphics::pixelcolor::BinaryColor;
+            use embedded_graphics::prelude::*;
             embedded_graphics::image::ImageRaw::<BinaryColor>::new(&img_buffer, 160)
                 .draw(&mut g13.g13)
                 .expect("G13 to be connected");
@@ -194,7 +189,7 @@ impl Plugin for ImageExportPlugin {
         let g13r: G13Resource = G13Resource { g13 };
 
         app.configure_sets(PostUpdate, ImageExportSetup)
-            .insert_resource(g13r.clone())
+            .insert_resource(g13r.clone()) // input only
             .register_type::<ImageExportSource>()
             .init_asset::<ImageExportSource>()
             .register_asset_reflect::<ImageExportSource>()
@@ -206,7 +201,9 @@ impl Plugin for ImageExportPlugin {
 
         let render_app = app.sub_app_mut(RenderApp);
 
-        render_app.insert_resource(g13r).add_systems(
+        render_app
+            .insert_resource(g13r) // output only
+            .add_systems(
                 Render,
                 save_buffer_to_disk
                     .after(RenderSystems::Render)