.gitattributes

@@ -4,7 +4,6 @@
 *.html  text eol=lf diff=html
 *.java  text eol=lf diff=java
 *.js    text eol=lf diff=js
-*.sh    text eol=lf
 *.txt   text eol=lf
 
 *.class binary

.gitignore

@@ -1,5 +1,5 @@
-/lemur
-/lemur.exe
+/shrooms-vb
+/shrooms-vb.exe
 .vscode
 output
 /target

Cargo.toml

@@ -1,59 +1,35 @@
 [package]
-name = "lemur"
-description = "An emulator for the Virtual Boy."
-repository = "https://git.virtual-boy.com/PVB/lemur"
-publish = false
-license = "MIT"
-version = "0.4.6"
-edition = "2024"
+name = "shrooms-vb"
+version = "0.1.0"
+edition = "2021"
 
 [dependencies]
 anyhow = "1"
-atoi = "2"
-atomic = "0.6"
-bitflags = { version = "2", features = ["serde"] }
+bitflags = "2"
 bytemuck = { version = "1", features = ["derive"] }
 clap = { version = "4", features = ["derive"] }
 cpal = { git = "https://github.com/sidit77/cpal.git", rev = "66ed6be" }
-directories = "6"
-egui = { version = "0.30", features = ["serde"] }
-egui_extras = { version = "0.30", features = ["image"] }
-egui-toast = { git = "https://github.com/urholaukkarinen/egui-toast.git", rev = "d0bcf97" }
-egui-winit = "0.30"
-egui-wgpu = { version = "0.30", features = ["winit"] }
-fixed = { version = "1.28", features = ["num-traits"] }
-gilrs = { version = "0.11", features = ["serde-serialize"] }
-hex = "0.4"
-image = { version = "0.25", default-features = false, features = ["png"] }
-itertools = "0.14"
+egui = "0.29"
+egui_extras = "0.29"
+egui-winit = "0.29"
+egui-wgpu = { version = "0.29", features = ["winit"] }
+gilrs = "0.11"
+itertools = "0.13"
 num-derive = "0.4"
 num-traits = "0.2"
-oneshot = "0.1"
 pollster = "0.4"
-rfd = { version = "0.15", default-features = false, features = ["xdg-portal", "tokio"]}
+rfd = "0.15"
 rtrb = "0.3"
 rubato = "0.16"
-serde = { version = "1", features = ["derive"] }
-serde_json = "1"
 thread-priority = "1"
-tokio = { version = "1", features = ["io-util", "macros", "net", "rt", "sync", "time"] }
-tracing = { version = "0.1", features = ["release_max_level_info"] }
-tracing-subscriber = { version = "0.3", features = ["env-filter"] }
-wgpu = "23"
-winit = { version = "0.30", features = ["serde"] }
+wgpu = "22.1"
+winit = "0.30"
 
 [target.'cfg(windows)'.dependencies]
-windows = { version = "0.59", features = ["Win32_System_Threading"] }
+windows = { version = "0.58", features = ["Win32_System_Threading"] }
 
 [build-dependencies]
 cc = "1"
-winresource = "0.1"
 
 [profile.release]
-lto = true
-
-[package.metadata.bundle]
-name = "Lemur"
-identifier = "com.virtual-boy.Lemur"
-icon = ["assets/lemur-256x256.png"]
-category = "games"
+lto = true

README.md

@@ -1,27 +1,15 @@
-# Lemur
+# Shrooms VB (native)
 
-A Virtual Boy emulator built around the shrooms-vb core. Written in Rust, using winit, wgpu, and egui. Should run on any major OS.
+A native implementation of shrooms-vb. Written in Rust, using winit, wgpu, and Dear ImGui. Should run on any major OS.
 
 ## Setup
 
 Install the following dependencies:
- - `cargo` (via [rustup](https://rustup.rs/), the version from your package manager is too old)
- - a C compiler (any will do, [the build script](https://docs.rs/cc/latest/cc/#compile-time-requirements) will find it automatically)
- - (on linux) `libasound2-dev` and `libudev-dev`
+ - `cargo`
 
 Run
 ```sh
 cargo build --release
 ```
 
-The executable will be in `target/release/lemur[.exe]`
-
-## Release
-
-Bump the version number in `Cargo.toml`, then run this script:
-
-```sh
-./scripts/release.sh
-```
-
-It uses docker to cross compile for Windows, MacOS, and Linux. All binaries are left in the `output` directory.
+The executable will be in `target/release/shrooms-vb[.exe]`

build.Dockerfile

@@ -1,37 +0,0 @@
-# This Dockerfile produces a base image for builds.
-# It includes all dependencies necessary to cross-compile for Windows/MacOS/Linux.
-
-FROM crazymax/osxcross:latest-ubuntu AS osxcross
-
-FROM rust:latest
-RUN rustup target add x86_64-pc-windows-msvc && \
-    rustup target add x86_64-apple-darwin && \
-    rustup target add aarch64-apple-darwin && \
-    apt-get update && \
-    apt-get install -y clang-19 lld-19 libc6-dev libasound2-dev libudev-dev genisoimage mingw-w64 && \
-    cargo install cargo-bundle xwin && \
-    xwin --accept-license splat --output xwin && \
-    rm -rf .xwin-cache && \
-    ln -s $(which clang-19) /usr/bin/clang && \
-    ln -s $(which clang++-19) /usr/bin/clang++
-COPY --from=osxcross /osxcross /osxcross
-
-ENV PATH="/osxcross/bin:$PATH" \
-    LD_LIBRARY_PATH="/osxcross/lib" \
-    CC="clang-19" CXX="clang++-19" AR="llvm-ar-19" \
-    CC_x86_64-apple-darwin="o64-clang" \
-    CXX_x86_64-apple-darwin="o64-clang++" \
-    CC_aarch64-apple-darwin="oa64-clang" \
-    CXX_aarch64-apple-darwin="o6a4-clang++" \
-    SHROOMS_CFLAGS_x86_64-unknown-linux-gnu="-flto" \
-    CARGO_TARGET_X86_64_UNKNOWN_LINUX_GNU_RUSTFLAGS="-Clinker-plugin-lto -Clinker=clang -Clink-arg=-fuse-ld=lld" \
-    SHROOMS_CFLAGS_x86_64-pc-windows-msvc="-flto" \
-    CARGO_TARGET_X86_64_PC_WINDOWS_MSVC_RUSTFLAGS="-Lnative=/xwin/crt/lib/x86_64 -Lnative=/xwin/sdk/lib/um/x86_64 -Lnative=/xwin/sdk/lib/ucrt/x86_64 -Clinker-plugin-lto -Clink-arg=-fuse-ld=lld" \
-    CARGO_TARGET_X86_64_PC_WINDOWS_MSVC_LINKER="lld-link-19" \
-    CARGO_TARGET_X86_64_APPLE_DARWIN_LINKER="o64-clang" \
-    CARGO_TARGET_X86_64_APPLE_DARWIN_AR="llvm-ar-19" \
-    CARGO_TARGET_AARCH64_APPLE_DARWIN_LINKER="oa64-clang" \
-    CARGO_TARGET_AARCH64_APPLE_DARWIN_AR="llvm-ar-19" \
-    CROSS_COMPILE="setting-this-to-silence-a-warning-" \
-    RC_PATH="llvm-rc-19" \
-    MACOSX_DEPLOYMENT_TARGET="14.5"

build.rs

@@ -1,34 +1,14 @@
-use std::{error::Error, path::Path};
-
-fn main() -> Result<(), Box<dyn Error>> {
-    if std::env::var("CARGO_CFG_TARGET_OS")? == "windows" {
-        let mut res = winresource::WindowsResource::new();
-        res.set_icon("assets/lemur.ico");
-        res.compile()?;
-    }
+use std::path::Path;
 
+fn main() {
     println!("cargo::rerun-if-changed=shrooms-vb-core");
-
-    let mut builder = cc::Build::new();
-    let _ = builder.try_flags_from_environment("SHROOMS_CFLAGS");
-    let opt_level = if builder.get_compiler().is_like_msvc() {
-        2
-    } else {
-        3
-    };
-    builder
+    cc::Build::new()
         .include(Path::new("shrooms-vb-core/core"))
-        .opt_level(opt_level)
+        .opt_level(2)
         .flag_if_supported("-fno-strict-aliasing")
         .define("VB_LITTLE_ENDIAN", None)
         .define("VB_SIGNED_PROPAGATE", None)
         .define("VB_DIV_GENERIC", None)
-        .define("VB_DIRECT_EXECUTE", "on_execute")
-        .define("VB_DIRECT_FRAME", "on_frame")
-        .define("VB_DIRECT_READ", "on_read")
-        .define("VB_DIRECT_WRITE", "on_write")
         .file(Path::new("shrooms-vb-core/core/vb.c"))
         .compile("vb");
-
-    Ok(())
 }

scripts/do-bundle.sh

@@ -1,35 +0,0 @@
-# Set everything up
-rm -rf output
-mkdir -p output
-cargo clean
-
-# Build for linux
-cargo build --release
-cp target/release/lemur output/lemur-linux
-
-# Bundle for Linux
-cargo bundle --release --format deb
-cp target/release/bundle/deb/*.deb output
-
-# Build for Windows
-cargo build --release --target x86_64-pc-windows-msvc
-cp target/x86_64-pc-windows-msvc/release/lemur.exe output
-
-# Build for MacOS Intel
-cargo build --release --target x86_64-apple-darwin
-cp target/x86_64-apple-darwin/release/lemur output/lemur-osx-intel
-
-# Bundle for MacOS Intel
-cargo bundle --release --target x86_64-apple-darwin --format osx
-genisoimage -V lemur -D -R -apple -no-pad -o output/Lemur-Intel.dmg target/x86_64-apple-darwin/release/bundle/osx
-
-# Build for MacOS Apple Silicon
-cargo build --release --target aarch64-apple-darwin
-cp target/aarch64-apple-darwin/release/lemur output/lemur-osx-apple-silicon
-
-# Bundle for MacOS Apple Silicon
-cargo bundle --release --target aarch64-apple-darwin --format osx
-genisoimage -V lemur -D -R -apple -no-pad -o output/Lemur-Apple-Silicon.dmg target/aarch64-apple-darwin/release/bundle/osx
-
-# Clean up after ourselves
-cargo clean

scripts/release.sh

@@ -1,72 +0,0 @@
-set -e
-version=$(cat Cargo.toml | sed -n -e '/version/ {s/.* = *//p;q}' | tr -d '"')
-
-read -p "You wanted to release $version, right? [Y/n] " -n 1 -r
-echo
-case "$REPLY" in
-    n|N ) exit 1;;
-esac
-
-if [ -z "${RELEASE_TOKEN}" ]; then
-    echo "Please set the RELEASE_TOKEN env var."
-    exit 1
-fi
-if ! command -v curl 2>&1 >/dev/null; then
-    echo "Please install curl."
-    exit 1
-fi
-if ! command -v jq 2>&1 >/dev/null; then
-    echo "Please install jq."
-    exit 1
-fi
-if ! command -v docker 2>&1 >/dev/null; then
-    echo "Please install docker."
-    exit 1
-fi
-
-docker build -f build.Dockerfile -t lemur-build .
-MSYS_NO_PATHCONV=1 docker run -it --rm -v .:/app -w /app --entrypoint bash lemur-build /app/scripts/do-bundle.sh
-
-body=$(cat <<EOF
-## How to install
-
-The emulator can be found in the "Downloads" section of this release.
-
-### Windows users
-
-Download \`lemur.exe\`.
-
-### MacOS users
-
-If your Mac uses an Intel processor, download and install \`Lemur-Intel.dmg\`.
-
-If it uses Apple Silicon, download and install \`Lemur-Apple-Silicon.dmg\`.
-
-If you're not sure which to choose, use [this guide](https://support.apple.com/en-us/116943) to find out.
-
-### Linux users
-
-You can either download and run \`lemur-linux\`, or download and install the attached .deb file.
-EOF
-)
-
-payload=$(cat <<EOF
-{
-  "body": $(echo "$body" | jq -Rsa .),
-  "draft": false,
-  "name": "v${version}",
-  "prerelease": false,
-  "tag_name": "v${version}"
-}
-EOF
-)
-
-echo "Creating release..."
-response=$(curl -s --json "$payload" "https://git.virtual-boy.com/api/v1/repos/PVB/lemur/releases?token=$RELEASE_TOKEN")
-echo "$response"
-upload_url=$(echo "$response" | jq -r '.upload_url')
-for file in output/*; do
-    echo "Uploading $(basename "$file")..."
-    upload_res=$(curl -s -F "attachment=@$file" "$upload_url?name=$(basename "$file")&token=$RELEASE_TOKEN")
-    echo "$upload_res"
-done

shrooms-vb-core

@@ -1 +1 @@
-Subproject commit ecbd103917315e3aa24fd2a682208f5548ec5d1b
+Subproject commit 18b2c589e6cacec5a0bd0f450cedf2f8fe3a2bc8

src/anaglyph.wgsl

@@ -49,31 +49,7 @@ struct Colors {
 var<uniform> colors: Colors;
 
 @fragment
-fn fs_lefteye(in: VertexOutput) -> @location(0) vec4<f32> {
-    let brt = textureSample(u_texture, u_sampler, in.tex_coords);
-    return colors.left * brt[0];
-}
-
-@fragment
-fn fs_righteye(in: VertexOutput) -> @location(0) vec4<f32> {
-    let brt = textureSample(u_texture, u_sampler, in.tex_coords);
-    return colors.left * brt[1];
-}
-
-@fragment
-fn fs_anaglyph(in: VertexOutput) -> @location(0) vec4<f32> {
+fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
     let brt = textureSample(u_texture, u_sampler, in.tex_coords);
     return colors.left * brt[0] + colors.right * brt[1];
 }
-
-@fragment
-fn fs_sidebyside(in: VertexOutput) -> @location(0) vec4<f32> {
-    var point = in.tex_coords;
-    point.x = (point.x * 2.0) % 1.0;
-    let brt = textureSample(u_texture, u_sampler, point);
-    if in.tex_coords.x < 0.5 {
-        return colors.left * brt[0];
-    } else {
-        return colors.left * brt[1];
-    };
-}

src/app.rs

@@ -1,12 +1,11 @@
-use std::{collections::HashSet, num::NonZero, sync::Arc, thread, time::Duration};
+use std::{collections::HashSet, num::NonZero, sync::Arc, thread};
 
 use egui::{
-    Context, FontData, FontDefinitions, FontFamily, IconData, TextWrapMode, ViewportBuilder,
-    ViewportCommand, ViewportId, ViewportInfo,
     ahash::{HashMap, HashMapExt},
+    Context, FontData, FontDefinitions, FontFamily, TextWrapMode, ViewportBuilder, ViewportCommand,
+    ViewportId, ViewportInfo,
 };
 use gilrs::{EventType, Gilrs};
-use tracing::{error, warn};
 use winit::{
     application::ApplicationHandler,
     event::WindowEvent,
@@ -16,109 +15,55 @@ use winit::{
 
 use crate::{
     controller::ControllerManager,
-    emulator::{EmulatorClient, EmulatorCommand, SimId},
-    images::ImageProcessor,
-    input::{MappingProvider, ShortcutProvider},
-    memory::MemoryClient,
-    persistence::Persistence,
-    window::{
-        AboutWindow, AppWindow, BgMapWindow, CharacterDataWindow, FrameBufferWindow, GameWindow,
-        GdbServerWindow, InputWindow, ObjectWindow, RegisterWindow, ShortcutsWindow, WorldWindow,
-    },
+    emulator::{EmulatorClient, SimId},
+    input::MappingProvider,
+    window::{AppWindow, GameWindow, InputWindow},
 };
 
-fn load_icon() -> anyhow::Result<IconData> {
-    let bytes = include_bytes!("../assets/lemur-256x256.png");
-    let img = image::load_from_memory_with_format(bytes, image::ImageFormat::Png)?;
-    let rgba = img.into_rgba8();
-    Ok(IconData {
-        width: rgba.width(),
-        height: rgba.height(),
-        rgba: rgba.into_vec(),
-    })
-}
-
 pub struct Application {
-    icon: Option<Arc<IconData>>,
-    wgpu: WgpuState,
     client: EmulatorClient,
     proxy: EventLoopProxy<UserEvent>,
     mappings: MappingProvider,
-    shortcuts: ShortcutProvider,
     controllers: ControllerManager,
-    memory: Arc<MemoryClient>,
-    images: ImageProcessor,
-    persistence: Persistence,
     viewports: HashMap<ViewportId, Viewport>,
     focused: Option<ViewportId>,
-    init_debug_port: Option<u16>,
 }
 
 impl Application {
-    pub fn new(
-        client: EmulatorClient,
-        proxy: EventLoopProxy<UserEvent>,
-        debug_port: Option<u16>,
-    ) -> Self {
-        let wgpu = WgpuState::new();
-        let icon = load_icon().ok().map(Arc::new);
-        let persistence = Persistence::new();
-        let mappings = MappingProvider::new(persistence.clone());
-        let shortcuts = ShortcutProvider::new(persistence.clone());
+    pub fn new(client: EmulatorClient, proxy: EventLoopProxy<UserEvent>) -> Self {
+        let mappings = MappingProvider::new();
         let controllers = ControllerManager::new(client.clone(), &mappings);
-        let memory = Arc::new(MemoryClient::new(client.clone()));
-        let images = ImageProcessor::new();
         {
             let mappings = mappings.clone();
             let proxy = proxy.clone();
             thread::spawn(|| process_gamepad_input(mappings, proxy));
         }
         Self {
-            icon,
-            wgpu,
             client,
             proxy,
             mappings,
-            shortcuts,
-            memory,
-            images,
             controllers,
-            persistence,
             viewports: HashMap::new(),
             focused: None,
-            init_debug_port: debug_port,
         }
     }
 
     fn open(&mut self, event_loop: &ActiveEventLoop, window: Box<dyn AppWindow>) {
         let viewport_id = window.viewport_id();
-        if let Some(viewport) = self.viewports.get(&viewport_id) {
-            viewport.window.focus_window();
+        if self.viewports.contains_key(&viewport_id) {
             return;
         }
-        self.viewports.insert(
-            viewport_id,
-            Viewport::new(event_loop, &self.wgpu, self.icon.clone(), window),
-        );
+        self.viewports
+            .insert(viewport_id, Viewport::new(event_loop, window));
     }
 }
 
 impl ApplicationHandler<UserEvent> for Application {
     fn resumed(&mut self, event_loop: &ActiveEventLoop) {
-        if let Some(port) = self.init_debug_port {
-            let mut server =
-                GdbServerWindow::new(SimId::Player1, self.client.clone(), self.proxy.clone());
-            server.launch(port);
-            self.open(event_loop, Box::new(server));
-        }
-        let app = GameWindow::new(
-            self.client.clone(),
-            self.proxy.clone(),
-            self.persistence.clone(),
-            self.shortcuts.clone(),
-            SimId::Player1,
-        );
-        self.open(event_loop, Box::new(app));
+        let app = GameWindow::new(self.client.clone(), self.proxy.clone(), SimId::Player1);
+        let wrapper = Viewport::new(event_loop, Box::new(app));
+        self.focused = Some(wrapper.id());
+        self.viewports.insert(wrapper.id(), wrapper);
     }
 
     fn window_event(
@@ -135,23 +80,19 @@ impl ApplicationHandler<UserEvent> for Application {
             return;
         };
         let viewport_id = viewport.id();
+        match &event {
+            WindowEvent::KeyboardInput { event, .. } => {
+                self.controllers.handle_key_event(event);
+                viewport.app.handle_key_event(event);
+            }
+            WindowEvent::Focused(new_focused) => {
+                self.focused = new_focused.then_some(viewport_id);
+            }
+            _ => {}
+        }
         let mut queue_redraw = false;
         let mut inactive_viewports = HashSet::new();
-        let (consumed, action) = viewport.on_window_event(&event);
-        if !consumed {
-            match event {
-                WindowEvent::KeyboardInput { event, .. } => {
-                    if !viewport.app.handle_key_event(&event) {
-                        self.controllers.handle_key_event(&event);
-                    }
-                }
-                WindowEvent::Focused(new_focused) => {
-                    self.focused = new_focused.then_some(viewport_id);
-                }
-                _ => {}
-            }
-        }
-        match action {
+        match viewport.on_window_event(event) {
             Some(Action::Redraw) => {
                 for viewport in self.viewports.values_mut() {
                     match viewport.redraw(event_loop) {
@@ -203,75 +144,24 @@ impl ApplicationHandler<UserEvent> for Application {
     fn user_event(&mut self, event_loop: &ActiveEventLoop, event: UserEvent) {
         match event {
             UserEvent::GamepadEvent(event) => {
-                if let Some(viewport) = self
+                self.controllers.handle_gamepad_event(&event);
+                let Some(viewport) = self
                     .focused
                     .as_ref()
                     .and_then(|id| self.viewports.get_mut(id))
-                {
-                    if viewport.app.handle_gamepad_event(&event) {
-                        return;
-                    }
-                }
-                self.controllers.handle_gamepad_event(&event);
-            }
-            UserEvent::OpenAbout => {
-                let about = AboutWindow;
-                self.open(event_loop, Box::new(about));
-            }
-            UserEvent::OpenCharacterData(sim_id) => {
-                let chardata = CharacterDataWindow::new(sim_id, &self.memory, &mut self.images);
-                self.open(event_loop, Box::new(chardata));
-            }
-            UserEvent::OpenBgMap(sim_id) => {
-                let bgmap = BgMapWindow::new(sim_id, &self.memory, &mut self.images);
-                self.open(event_loop, Box::new(bgmap));
-            }
-            UserEvent::OpenObjects(sim_id) => {
-                let objects = ObjectWindow::new(sim_id, &self.memory, &mut self.images);
-                self.open(event_loop, Box::new(objects));
-            }
-            UserEvent::OpenWorlds(sim_id) => {
-                let world = WorldWindow::new(sim_id, &self.memory, &mut self.images);
-                self.open(event_loop, Box::new(world));
-            }
-            UserEvent::OpenFrameBuffers(sim_id) => {
-                let world = FrameBufferWindow::new(sim_id, &self.memory, &mut self.images);
-                self.open(event_loop, Box::new(world));
-            }
-            UserEvent::OpenRegisters(sim_id) => {
-                let registers = RegisterWindow::new(sim_id, &self.memory);
-                self.open(event_loop, Box::new(registers));
-            }
-            UserEvent::OpenDebugger(sim_id) => {
-                let debugger =
-                    GdbServerWindow::new(sim_id, self.client.clone(), self.proxy.clone());
-                self.open(event_loop, Box::new(debugger));
+                else {
+                    return;
+                };
+                viewport.app.handle_gamepad_event(&event);
             }
             UserEvent::OpenInput => {
                 let input = InputWindow::new(self.mappings.clone());
                 self.open(event_loop, Box::new(input));
             }
-            UserEvent::OpenShortcuts => {
-                let shortcuts = ShortcutsWindow::new(self.shortcuts.clone());
-                self.open(event_loop, Box::new(shortcuts));
-            }
             UserEvent::OpenPlayer2 => {
-                let p2 = GameWindow::new(
-                    self.client.clone(),
-                    self.proxy.clone(),
-                    self.persistence.clone(),
-                    self.shortcuts.clone(),
-                    SimId::Player2,
-                );
+                let p2 = GameWindow::new(self.client.clone(), self.proxy.clone(), SimId::Player2);
                 self.open(event_loop, Box::new(p2));
             }
-            UserEvent::Quit(sim_id) => {
-                self.viewports
-                    .retain(|_, viewport| viewport.app.sim_id() != sim_id);
-                if !self.viewports.contains_key(&ViewportId::ROOT) {
-                    event_loop.exit();
-                }
-            }
         }
     }
 
@@ -280,67 +170,6 @@ impl ApplicationHandler<UserEvent> for Application {
             viewport.window.request_redraw();
         }
     }
-
-    fn exiting(&mut self, _event_loop: &ActiveEventLoop) {
-        let (sender, receiver) = oneshot::channel();
-        if self.client.send_command(EmulatorCommand::Exit(sender)) {
-            if let Err(error) = receiver.recv_timeout(Duration::from_secs(5)) {
-                error!(%error, "could not gracefully exit.");
-            }
-        }
-    }
-}
-
-struct WgpuState {
-    instance: Arc<wgpu::Instance>,
-    adapter: Arc<wgpu::Adapter>,
-    device: Arc<wgpu::Device>,
-    queue: Arc<wgpu::Queue>,
-}
-
-impl WgpuState {
-    fn new() -> Self {
-        #[allow(unused_variables)]
-        let egui_wgpu::WgpuConfiguration {
-            wgpu_setup:
-                egui_wgpu::WgpuSetup::CreateNew {
-                    supported_backends,
-                    device_descriptor,
-                    ..
-                },
-            ..
-        } = egui_wgpu::WgpuConfiguration::default()
-        else {
-            panic!("required fields not found")
-        };
-        #[cfg(windows)]
-        let supported_backends = wgpu::util::backend_bits_from_env()
-            .unwrap_or((wgpu::Backends::PRIMARY | wgpu::Backends::GL) - wgpu::Backends::VULKAN);
-        let instance = wgpu::Instance::new(wgpu::InstanceDescriptor {
-            backends: supported_backends,
-            ..wgpu::InstanceDescriptor::default()
-        });
-
-        let adapter = pollster::block_on(instance.request_adapter(&wgpu::RequestAdapterOptions {
-            power_preference: wgpu::PowerPreference::HighPerformance,
-            compatible_surface: None,
-            force_fallback_adapter: false,
-        }))
-        .expect("could not create adapter");
-
-        let trace_path = std::env::var("WGPU_TRACE");
-        let (device, queue) = pollster::block_on(adapter.request_device(
-            &(*device_descriptor)(&adapter),
-            trace_path.ok().as_ref().map(std::path::Path::new),
-        ))
-        .expect("could not request device");
-        Self {
-            instance: Arc::new(instance),
-            adapter: Arc::new(adapter),
-            device: Arc::new(device),
-            queue: Arc::new(queue),
-        }
-    }
 }
 
 struct Viewport {
@@ -354,19 +183,20 @@ struct Viewport {
     app: Box<dyn AppWindow>,
 }
 impl Viewport {
-    pub fn new(
-        event_loop: &ActiveEventLoop,
-        wgpu: &WgpuState,
-        icon: Option<Arc<IconData>>,
-        mut app: Box<dyn AppWindow>,
-    ) -> Self {
+    pub fn new(event_loop: &ActiveEventLoop, mut app: Box<dyn AppWindow>) -> Self {
+        let mut painter = egui_wgpu::winit::Painter::new(
+            egui_wgpu::WgpuConfiguration::default(),
+            1,
+            None,
+            false,
+            true,
+        );
+
         let ctx = Context::default();
-        let mut fonts = FontDefinitions::default();
+        let mut fonts = FontDefinitions::empty();
         fonts.font_data.insert(
             "Selawik".into(),
-            Arc::new(FontData::from_static(include_bytes!(
-                "../assets/selawik.ttf"
-            ))),
+            FontData::from_static(include_bytes!("../assets/selawik.ttf")),
         );
         fonts
             .families
@@ -378,31 +208,13 @@ impl Viewport {
             s.wrap_mode = Some(TextWrapMode::Extend);
             s.visuals.menu_rounding = Default::default();
         });
-        egui_extras::install_image_loaders(&ctx);
-
-        let wgpu_config = egui_wgpu::WgpuConfiguration {
-            present_mode: wgpu::PresentMode::AutoNoVsync,
-            wgpu_setup: egui_wgpu::WgpuSetup::Existing {
-                instance: wgpu.instance.clone(),
-                adapter: wgpu.adapter.clone(),
-                device: wgpu.device.clone(),
-                queue: wgpu.queue.clone(),
-            },
-            ..egui_wgpu::WgpuConfiguration::default()
-        };
-
-        let mut painter =
-            egui_wgpu::winit::Painter::new(ctx.clone(), wgpu_config, 1, None, false, true);
 
         let mut info = ViewportInfo::default();
-        let mut builder = app.initial_viewport();
-        if let Some(icon) = icon {
-            builder = builder.with_icon(icon);
-        }
+        let builder = app.initial_viewport();
         let (window, state) = create_window_and_state(&ctx, event_loop, &builder, &mut painter);
         egui_winit::update_viewport_info(&mut info, &ctx, &window, true);
 
-        app.on_init(&ctx, painter.render_state().as_ref().unwrap());
+        app.on_init(painter.render_state().as_ref().unwrap());
         Self {
             painter,
             ctx,
@@ -419,8 +231,8 @@ impl Viewport {
         self.app.viewport_id()
     }
 
-    pub fn on_window_event(&mut self, event: &WindowEvent) -> (bool, Option<Action>) {
-        let response = self.state.on_window_event(&self.window, event);
+    pub fn on_window_event(&mut self, event: WindowEvent) -> Option<Action> {
+        let response = self.state.on_window_event(&self.window, &event);
         egui_winit::update_viewport_info(
             &mut self.info,
             self.state.egui_ctx(),
@@ -428,22 +240,22 @@ impl Viewport {
             false,
         );
 
-        let action = match event {
+        match event {
             WindowEvent::RedrawRequested => Some(Action::Redraw),
             WindowEvent::CloseRequested => Some(Action::Close),
             WindowEvent::Resized(size) => {
-                if let (Some(width), Some(height)) =
+                let (Some(width), Some(height)) =
                     (NonZero::new(size.width), NonZero::new(size.height))
-                {
-                    self.painter
-                        .on_window_resized(ViewportId::ROOT, width, height);
-                }
+                else {
+                    return None;
+                };
+                self.painter
+                    .on_window_resized(ViewportId::ROOT, width, height);
                 None
             }
             _ if response.repaint => Some(Action::Redraw),
             _ => None,
-        };
-        (response.consumed, action)
+        }
     }
 
     fn redraw(&mut self, event_loop: &ActiveEventLoop) -> Option<Action> {
@@ -459,7 +271,7 @@ impl Viewport {
             [0.0, 0.0, 0.0, 0.0],
             &clipped_primitives,
             &output.textures_delta,
-            vec![],
+            false,
         );
 
         self.state
@@ -504,18 +316,8 @@ impl Drop for Viewport {
 #[derive(Debug)]
 pub enum UserEvent {
     GamepadEvent(gilrs::Event),
-    OpenAbout,
-    OpenCharacterData(SimId),
-    OpenBgMap(SimId),
-    OpenObjects(SimId),
-    OpenWorlds(SimId),
-    OpenFrameBuffers(SimId),
-    OpenRegisters(SimId),
-    OpenDebugger(SimId),
     OpenInput,
-    OpenShortcuts,
     OpenPlayer2,
-    Quit(SimId),
 }
 
 pub enum Action {
@@ -544,12 +346,9 @@ fn create_window_and_state(
 }
 
 fn process_gamepad_input(mappings: MappingProvider, proxy: EventLoopProxy<UserEvent>) {
-    let mut gilrs = match Gilrs::new() {
-        Ok(gilrs) => gilrs,
-        Err(error) => {
-            warn!(%error, "could not connect gamepad listener");
-            return;
-        }
+    let Ok(mut gilrs) = Gilrs::new() else {
+        eprintln!("could not connect gamepad listener");
+        return;
     };
     while let Some(event) = gilrs.next_event_blocking(None) {
         if event.event == EventType::Connected {

src/audio.rs

@@ -1,10 +1,9 @@
 use std::time::Duration;
 
-use anyhow::{Result, bail};
+use anyhow::{bail, Result};
 use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
 use itertools::Itertools;
 use rubato::{FftFixedInOut, Resampler};
-use tracing::error;
 
 pub struct Audio {
     #[allow(unused)]
@@ -55,7 +54,7 @@ impl Audio {
                 }
                 chunk.commit_all();
             },
-            move |error| error!(%error, "stream error"),
+            move |err| eprintln!("stream error: {err}"),
             None,
         )?;
         stream.play()?;

src/controller.rs

@@ -1,6 +1,6 @@
 use std::sync::{Arc, RwLock};
 
-use gilrs::{Event as GamepadEvent, EventType, GamepadId, ev::Code};
+use gilrs::{ev::Code, Event as GamepadEvent, EventType, GamepadId};
 use winit::{
     event::{ElementState, KeyEvent},
     keyboard::PhysicalKey,

src/emulator.rs

@@ -1,33 +1,32 @@
 use std::{
     collections::HashMap,
-    fmt::Display,
-    fs::{self, File},
-    io::{Read, Seek, SeekFrom, Write},
+    fs,
     path::{Path, PathBuf},
     sync::{
-        Arc, Weak,
-        atomic::{AtomicBool, Ordering},
+        atomic::{AtomicBool, AtomicUsize, Ordering},
         mpsc::{self, RecvError, TryRecvError},
+        Arc,
     },
 };
 
 use anyhow::Result;
-use atomic::Atomic;
-use bytemuck::NoUninit;
-use egui_toast::{Toast, ToastKind, ToastOptions};
-use tracing::{error, warn};
 
-use crate::{
-    audio::Audio,
-    graphics::TextureSink,
-    memory::{MemoryRange, MemoryRegion},
-};
-use shrooms_vb_core::{EXPECTED_FRAME_SIZE, Sim, StopReason};
-pub use shrooms_vb_core::{VBKey, VBRegister, VBWatchpointType};
+use crate::{audio::Audio, graphics::TextureSink};
+pub use shrooms_vb_core::VBKey;
+use shrooms_vb_core::{Sim, EXPECTED_FRAME_SIZE};
 
-mod address_set;
 mod shrooms_vb_core;
 
+pub struct EmulatorBuilder {
+    rom: Option<PathBuf>,
+    commands: mpsc::Receiver<EmulatorCommand>,
+    sim_count: Arc<AtomicUsize>,
+    running: Arc<[AtomicBool; 2]>,
+    has_game: Arc<[AtomicBool; 2]>,
+    audio_on: Arc<[AtomicBool; 2]>,
+    linked: Arc<AtomicBool>,
+}
+
 #[derive(PartialEq, Eq, Hash, Clone, Copy, Debug)]
 pub enum SimId {
     Player1,
@@ -44,61 +43,6 @@ impl SimId {
         }
     }
 }
-impl Display for SimId {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.write_str(match self {
-            Self::Player1 => "Player 1",
-            Self::Player2 => "Player 2",
-        })
-    }
-}
-
-struct Cart {
-    rom_path: PathBuf,
-    rom: Vec<u8>,
-    sram_file: File,
-    sram: Vec<u8>,
-}
-
-impl Cart {
-    fn load(rom_path: &Path, sim_id: SimId) -> Result<Self> {
-        let rom = fs::read(rom_path)?;
-
-        let mut sram_file = File::options()
-            .read(true)
-            .write(true)
-            .create(true)
-            .truncate(false)
-            .open(sram_path(rom_path, sim_id))?;
-        sram_file.set_len(8 * 1024)?;
-
-        let mut sram = vec![];
-        sram_file.read_to_end(&mut sram)?;
-        Ok(Cart {
-            rom_path: rom_path.to_path_buf(),
-            rom,
-            sram_file,
-            sram,
-        })
-    }
-}
-
-fn sram_path(rom_path: &Path, sim_id: SimId) -> PathBuf {
-    match sim_id {
-        SimId::Player1 => rom_path.with_extension("p1.sram"),
-        SimId::Player2 => rom_path.with_extension("p2.sram"),
-    }
-}
-
-pub struct EmulatorBuilder {
-    rom: Option<PathBuf>,
-    commands: mpsc::Receiver<EmulatorCommand>,
-    sim_state: Arc<[Atomic<SimState>; 2]>,
-    state: Arc<Atomic<EmulatorState>>,
-    audio_on: Arc<[AtomicBool; 2]>,
-    linked: Arc<AtomicBool>,
-    start_paused: bool,
-}
 
 impl EmulatorBuilder {
     pub fn new() -> (Self, EmulatorClient) {
@@ -106,19 +50,17 @@ impl EmulatorBuilder {
         let builder = Self {
             rom: None,
             commands,
-            sim_state: Arc::new([
-                Atomic::new(SimState::Uninitialized),
-                Atomic::new(SimState::Uninitialized),
-            ]),
-            state: Arc::new(Atomic::new(EmulatorState::Paused)),
+            sim_count: Arc::new(AtomicUsize::new(0)),
+            running: Arc::new([AtomicBool::new(false), AtomicBool::new(false)]),
+            has_game: Arc::new([AtomicBool::new(false), AtomicBool::new(false)]),
             audio_on: Arc::new([AtomicBool::new(true), AtomicBool::new(true)]),
             linked: Arc::new(AtomicBool::new(false)),
-            start_paused: false,
         };
         let client = EmulatorClient {
             queue,
-            sim_state: builder.sim_state.clone(),
-            state: builder.state.clone(),
+            sim_count: builder.sim_count.clone(),
+            running: builder.running.clone(),
+            has_game: builder.has_game.clone(),
             audio_on: builder.audio_on.clone(),
             linked: builder.linked.clone(),
         };
@@ -132,26 +74,17 @@ impl EmulatorBuilder {
         }
     }
 
-    pub fn start_paused(self, paused: bool) -> Self {
-        Self {
-            start_paused: paused,
-            ..self
-        }
-    }
-
     pub fn build(self) -> Result<Emulator> {
         let mut emulator = Emulator::new(
             self.commands,
-            self.sim_state,
-            self.state,
+            self.sim_count,
+            self.running,
+            self.has_game,
             self.audio_on,
             self.linked,
         )?;
         if let Some(path) = self.rom {
-            emulator.load_cart(SimId::Player1, &path)?;
-        }
-        if self.start_paused {
-            emulator.pause_sims()?;
+            emulator.load_rom(SimId::Player1, &path)?;
         }
         Ok(emulator)
     }
@@ -159,87 +92,69 @@ impl EmulatorBuilder {
 
 pub struct Emulator {
     sims: Vec<Sim>,
-    carts: [Option<Cart>; 2],
     audio: Audio,
     commands: mpsc::Receiver<EmulatorCommand>,
-    sim_state: Arc<[Atomic<SimState>; 2]>,
-    state: Arc<Atomic<EmulatorState>>,
+    sim_count: Arc<AtomicUsize>,
+    running: Arc<[AtomicBool; 2]>,
+    has_game: Arc<[AtomicBool; 2]>,
     audio_on: Arc<[AtomicBool; 2]>,
     linked: Arc<AtomicBool>,
     renderers: HashMap<SimId, TextureSink>,
-    messages: HashMap<SimId, mpsc::Sender<Toast>>,
-    debuggers: HashMap<SimId, DebugInfo>,
-    watched_regions: HashMap<MemoryRange, Weak<MemoryRegion>>,
-    eye_contents: Vec<u8>,
-    audio_samples: Vec<f32>,
-    buffer: Vec<u8>,
 }
 
 impl Emulator {
     fn new(
         commands: mpsc::Receiver<EmulatorCommand>,
-        sim_state: Arc<[Atomic<SimState>; 2]>,
-        state: Arc<Atomic<EmulatorState>>,
+        sim_count: Arc<AtomicUsize>,
+        running: Arc<[AtomicBool; 2]>,
+        has_game: Arc<[AtomicBool; 2]>,
         audio_on: Arc<[AtomicBool; 2]>,
         linked: Arc<AtomicBool>,
     ) -> Result<Self> {
         Ok(Self {
             sims: vec![],
-            carts: [None, None],
             audio: Audio::init()?,
             commands,
-            sim_state,
-            state,
+            sim_count,
+            running,
+            has_game,
             audio_on,
             linked,
             renderers: HashMap::new(),
-            messages: HashMap::new(),
-            debuggers: HashMap::new(),
-            watched_regions: HashMap::new(),
-            eye_contents: vec![0u8; 384 * 224 * 2],
-            audio_samples: Vec::with_capacity(EXPECTED_FRAME_SIZE),
-            buffer: vec![],
         })
     }
 
-    pub fn load_cart(&mut self, sim_id: SimId, path: &Path) -> Result<()> {
-        let cart = Cart::load(path, sim_id)?;
-        self.reset_sim(sim_id, Some(cart))?;
+    pub fn load_rom(&mut self, sim_id: SimId, path: &Path) -> Result<()> {
+        let bytes = fs::read(path)?;
+        self.reset_sim(sim_id, Some(bytes))?;
         Ok(())
     }
 
     pub fn start_second_sim(&mut self, rom: Option<PathBuf>) -> Result<()> {
-        let rom_path = if let Some(path) = rom {
-            Some(path)
+        let bytes = if let Some(path) = rom {
+            Some(fs::read(path)?)
         } else {
-            self.carts[0].as_ref().map(|c| c.rom_path.clone())
+            self.sims.first().and_then(|s| s.clone_rom())
         };
-        let cart = match rom_path {
-            Some(rom_path) => Some(Cart::load(&rom_path, SimId::Player2)?),
-            None => None,
-        };
-        self.reset_sim(SimId::Player2, cart)?;
+        self.reset_sim(SimId::Player2, bytes)?;
         self.link_sims();
         Ok(())
     }
 
-    fn reset_sim(&mut self, sim_id: SimId, new_cart: Option<Cart>) -> Result<()> {
-        self.save_sram(sim_id)?;
-
+    fn reset_sim(&mut self, sim_id: SimId, new_rom: Option<Vec<u8>>) -> Result<()> {
         let index = sim_id.to_index();
         while self.sims.len() <= index {
             self.sims.push(Sim::new());
-            self.sim_state[index].store(SimState::NoGame, Ordering::Release);
         }
+        self.sim_count.store(self.sims.len(), Ordering::Relaxed);
         let sim = &mut self.sims[index];
         sim.reset();
-        if let Some(cart) = new_cart {
-            sim.load_cart(cart.rom.clone(), cart.sram.clone())?;
-            self.carts[index] = Some(cart);
-            self.sim_state[index].store(SimState::Ready, Ordering::Release);
+        if let Some(bytes) = new_rom {
+            sim.load_rom(bytes)?;
+            self.has_game[index].store(true, Ordering::Release);
         }
-        if self.sim_state[index].load(Ordering::Acquire) == SimState::Ready {
-            self.resume_sims();
+        if self.has_game[index].load(Ordering::Acquire) {
+            self.running[index].store(true, Ordering::Release);
         }
         Ok(())
     }
@@ -264,145 +179,66 @@ impl Emulator {
         self.linked.store(false, Ordering::Release);
     }
 
-    fn pause_sims(&mut self) -> Result<()> {
-        if self
-            .state
-            .compare_exchange(
-                EmulatorState::Running,
-                EmulatorState::Paused,
-                Ordering::AcqRel,
-                Ordering::Relaxed,
-            )
-            .is_ok()
-        {
-            for sim_id in SimId::values() {
-                self.save_sram(sim_id)?;
-            }
-        }
-        Ok(())
-    }
-
-    fn resume_sims(&mut self) {
-        let _ = self.state.compare_exchange(
-            EmulatorState::Paused,
-            EmulatorState::Running,
-            Ordering::AcqRel,
-            Ordering::Relaxed,
-        );
-    }
-
-    fn frame_advance(&mut self) {
-        if self
-            .state
-            .compare_exchange(
-                EmulatorState::Paused,
-                EmulatorState::Stepping,
-                Ordering::AcqRel,
-                Ordering::Acquire,
-            )
-            .is_err_and(|s| s == EmulatorState::Running)
-        {
-            let _ = self.state.compare_exchange(
-                EmulatorState::Running,
-                EmulatorState::Stepping,
-                Ordering::AcqRel,
-                Ordering::Relaxed,
-            );
-        }
-    }
-
-    fn save_sram(&mut self, sim_id: SimId) -> Result<()> {
-        let sim = self.sims.get_mut(sim_id.to_index());
-        let cart = self.carts[sim_id.to_index()].as_mut();
-        if let (Some(sim), Some(cart)) = (sim, cart) {
-            sim.read_sram(&mut cart.sram);
-            cart.sram_file.seek(SeekFrom::Start(0))?;
-            cart.sram_file.write_all(&cart.sram)?;
-        }
-        Ok(())
-    }
-
-    pub fn stop_second_sim(&mut self) -> Result<()> {
-        self.save_sram(SimId::Player2)?;
+    pub fn stop_second_sim(&mut self) {
         self.renderers.remove(&SimId::Player2);
         self.sims.truncate(1);
-        self.sim_state[SimId::Player2.to_index()].store(SimState::Uninitialized, Ordering::Release);
-        self.stop_debugging(SimId::Player2);
+        self.sim_count.store(self.sims.len(), Ordering::Relaxed);
+        self.running[SimId::Player2.to_index()].store(false, Ordering::Release);
+        self.has_game[SimId::Player2.to_index()].store(false, Ordering::Release);
         self.linked.store(false, Ordering::Release);
-        Ok(())
-    }
-
-    fn start_debugging(&mut self, sim_id: SimId, sender: DebugSender) {
-        if self.sim_state[sim_id.to_index()].load(Ordering::Acquire) != SimState::Ready {
-            // Can't debug unless a game is connected
-            return;
-        }
-        let debug = DebugInfo {
-            sender,
-            stop_reason: Some(DebugStopReason::Paused),
-        };
-        self.debuggers.insert(sim_id, debug);
-        self.state
-            .store(EmulatorState::Debugging, Ordering::Release);
-    }
-
-    fn stop_debugging(&mut self, sim_id: SimId) {
-        if let Some(sim) = self.sims.get_mut(sim_id.to_index()) {
-            sim.clear_debug_state();
-        }
-        self.debuggers.remove(&sim_id);
-        if self.debuggers.is_empty() {
-            let _ = self.state.compare_exchange(
-                EmulatorState::Debugging,
-                EmulatorState::Running,
-                Ordering::AcqRel,
-                Ordering::Relaxed,
-            );
-        }
-    }
-
-    fn debug_interrupt(&mut self, sim_id: SimId) {
-        self.debug_stop(sim_id, DebugStopReason::Paused);
-    }
-
-    fn debug_stop(&mut self, sim_id: SimId, reason: DebugStopReason) {
-        let Some(debugger) = self.debuggers.get_mut(&sim_id) else {
-            self.stop_debugging(sim_id);
-            return;
-        };
-        if debugger.stop_reason != Some(reason) {
-            debugger.stop_reason = Some(reason);
-            if debugger.sender.send(DebugEvent::Stopped(reason)).is_err() {
-                self.stop_debugging(sim_id);
-            }
-        }
-    }
-
-    fn debug_continue(&mut self, sim_id: SimId) -> bool {
-        let Some(debugger) = self.debuggers.get_mut(&sim_id) else {
-            self.stop_debugging(sim_id);
-            return false;
-        };
-        debugger.stop_reason = None;
-        true
-    }
-
-    fn debug_step(&mut self, sim_id: SimId) {
-        if self.debug_continue(sim_id) {
-            let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                return;
-            };
-            sim.step();
-        }
-    }
-
-    fn watch_memory(&mut self, range: MemoryRange, region: Weak<MemoryRegion>) {
-        self.watched_regions.insert(range, region);
     }
 
     pub fn run(&mut self) {
+        let mut eye_contents = vec![0u8; 384 * 224 * 2];
+        let mut audio_samples = vec![];
         loop {
-            let idle = self.tick();
+            let p1_running = self.running[SimId::Player1.to_index()].load(Ordering::Acquire);
+            let p2_running = self.running[SimId::Player2.to_index()].load(Ordering::Acquire);
+            let mut idle = p1_running || p2_running;
+            if p1_running && p2_running {
+                Sim::emulate_many(&mut self.sims);
+            } else if p1_running {
+                self.sims[SimId::Player1.to_index()].emulate();
+            } else if p2_running {
+                self.sims[SimId::Player2.to_index()].emulate();
+            }
+
+            for sim_id in SimId::values() {
+                let Some(renderer) = self.renderers.get_mut(&sim_id) else {
+                    continue;
+                };
+                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
+                    continue;
+                };
+                if sim.read_pixels(&mut eye_contents) {
+                    idle = false;
+                    if renderer.queue_render(&eye_contents).is_err() {
+                        self.renderers.remove(&sim_id);
+                    }
+                }
+            }
+            let p1_audio =
+                p1_running && self.audio_on[SimId::Player1.to_index()].load(Ordering::Acquire);
+            let p2_audio =
+                p2_running && self.audio_on[SimId::Player2.to_index()].load(Ordering::Acquire);
+            let weight = if p1_audio && p2_audio { 0.5 } else { 1.0 };
+            if p1_audio {
+                if let Some(sim) = self.sims.get_mut(SimId::Player1.to_index()) {
+                    sim.read_samples(&mut audio_samples, weight);
+                }
+            }
+            if p2_audio {
+                if let Some(sim) = self.sims.get_mut(SimId::Player2.to_index()) {
+                    sim.read_samples(&mut audio_samples, weight);
+                }
+            }
+            if audio_samples.is_empty() {
+                audio_samples.resize(EXPECTED_FRAME_SIZE, 0.0);
+            } else {
+                idle = false;
+            }
+            self.audio.update(&audio_samples);
+            audio_samples.clear();
             if idle {
                 // The game is paused, and we have output all the video/audio we have.
                 // Block the thread until a new command comes in.
@@ -424,217 +260,39 @@ impl Emulator {
                     }
                 }
             }
-            self.watched_regions.retain(|range, region| {
-                let Some(region) = region.upgrade() else {
-                    return false;
-                };
-                let Some(sim) = self.sims.get_mut(range.sim.to_index()) else {
-                    return false;
-                };
-                self.buffer.clear();
-                sim.read_memory(range.start, range.length, &mut self.buffer);
-                region.update(&self.buffer);
-                true
-            });
         }
     }
 
-    // returns true if the emulator is "idle" (i.e. this didn't output anything)
-    pub fn tick(&mut self) -> bool {
-        let p1_state = self.sim_state[SimId::Player1.to_index()].load(Ordering::Acquire);
-        let p2_state = self.sim_state[SimId::Player2.to_index()].load(Ordering::Acquire);
-        let state = self.state.load(Ordering::Acquire);
-
-        // Emulation
-        // Don't emulate if the state is "paused", or if any sim is paused in the debugger
-        let running = match state {
-            EmulatorState::Paused => false,
-            EmulatorState::Running | EmulatorState::Stepping => true,
-            EmulatorState::Debugging => self.debuggers.values().all(|d| d.stop_reason.is_none()),
-        };
-        let p1_running = running && p1_state == SimState::Ready;
-        let p2_running = running && p2_state == SimState::Ready;
-        let mut idle = !p1_running && !p2_running;
-        if p1_running && p2_running {
-            Sim::emulate_many(&mut self.sims);
-        } else if p1_running {
-            self.sims[SimId::Player1.to_index()].emulate();
-        } else if p2_running {
-            self.sims[SimId::Player2.to_index()].emulate();
-        }
-
-        if state == EmulatorState::Stepping {
-            self.state.store(EmulatorState::Paused, Ordering::Release);
-        }
-
-        // Debug state
-        if state == EmulatorState::Debugging {
-            for sim_id in SimId::values() {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    continue;
-                };
-                if let Some(reason) = sim.stop_reason() {
-                    let stop_reason = match reason {
-                        StopReason::Stepped => DebugStopReason::Trace,
-                        StopReason::Watchpoint(watch, address) => {
-                            DebugStopReason::Watchpoint(watch, address)
-                        }
-                        StopReason::Breakpoint => DebugStopReason::Breakpoint,
-                    };
-                    self.debug_stop(sim_id, stop_reason);
-                }
-            }
-        }
-
-        // Video
-        for sim_id in SimId::values() {
-            let Some(renderer) = self.renderers.get_mut(&sim_id) else {
-                continue;
-            };
-            let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                continue;
-            };
-            if sim.read_pixels(&mut self.eye_contents) {
-                idle = false;
-                if renderer.queue_render(&self.eye_contents).is_err() {
-                    self.renderers.remove(&sim_id);
-                }
-            }
-        }
-
-        // Audio
-        // Audio playback speed is how we keep the emulator running in real time.
-        // Even if we're muted, call `read_samples` to know how many frames of silence to play.
-        let p1_audio =
-            p1_running && self.audio_on[SimId::Player1.to_index()].load(Ordering::Acquire);
-        let p2_audio =
-            p2_running && self.audio_on[SimId::Player2.to_index()].load(Ordering::Acquire);
-        let (p1_weight, p2_weight) = match (p1_audio, p2_audio) {
-            (true, true) => (0.5, 0.5),
-            (true, false) => (1.0, 0.0),
-            (false, true) => (0.0, 1.0),
-            (false, false) => (0.0, 0.0),
-        };
-        if let Some(sim) = self.sims.get_mut(SimId::Player1.to_index()) {
-            sim.read_samples(&mut self.audio_samples, p1_weight);
-        }
-        if let Some(sim) = self.sims.get_mut(SimId::Player2.to_index()) {
-            sim.read_samples(&mut self.audio_samples, p2_weight);
-        }
-        if !self.audio_samples.is_empty() {
-            idle = false;
-        }
-        self.audio.update(&self.audio_samples);
-        self.audio_samples.clear();
-        idle
-    }
-
     fn handle_command(&mut self, command: EmulatorCommand) {
         match command {
-            EmulatorCommand::ConnectToSim(sim_id, renderer, messages) => {
+            EmulatorCommand::SetRenderer(sim_id, renderer) => {
                 self.renderers.insert(sim_id, renderer);
-                self.messages.insert(sim_id, messages);
             }
             EmulatorCommand::LoadGame(sim_id, path) => {
-                if let Err(error) = self.load_cart(sim_id, &path) {
-                    self.report_error(sim_id, format!("Error loading rom: {error}"));
+                if let Err(error) = self.load_rom(sim_id, &path) {
+                    eprintln!("error loading rom: {}", error);
                 }
             }
             EmulatorCommand::StartSecondSim(path) => {
                 if let Err(error) = self.start_second_sim(path) {
-                    self.report_error(
-                        SimId::Player2,
-                        format!("Error starting second sim: {error}"),
-                    );
+                    eprintln!("error starting second sim: {}", error);
                 }
             }
             EmulatorCommand::StopSecondSim => {
-                if let Err(error) = self.stop_second_sim() {
-                    self.report_error(
-                        SimId::Player2,
-                        format!("Error stopping second sim: {error}"),
-                    );
-                }
+                self.stop_second_sim();
             }
             EmulatorCommand::Pause => {
-                if let Err(error) = self.pause_sims() {
-                    self.report_error(SimId::Player1, format!("Error pausing: {error}"));
+                for sim in SimId::values() {
+                    self.running[sim.to_index()].store(false, Ordering::Release);
                 }
             }
             EmulatorCommand::Resume => {
-                self.resume_sims();
-            }
-            EmulatorCommand::FrameAdvance => {
-                self.frame_advance();
-            }
-            EmulatorCommand::StartDebugging(sim_id, debugger) => {
-                self.start_debugging(sim_id, debugger);
-            }
-            EmulatorCommand::StopDebugging(sim_id) => {
-                self.stop_debugging(sim_id);
-            }
-            EmulatorCommand::DebugInterrupt(sim_id) => {
-                self.debug_interrupt(sim_id);
-            }
-            EmulatorCommand::DebugContinue(sim_id) => {
-                self.debug_continue(sim_id);
-            }
-            EmulatorCommand::DebugStep(sim_id) => {
-                self.debug_step(sim_id);
-            }
-            EmulatorCommand::ReadRegister(sim_id, register, done) => {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    return;
-                };
-                let value = sim.read_register(register);
-                let _ = done.send(value);
-            }
-            EmulatorCommand::WriteRegister(sim_id, register, value) => {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    return;
-                };
-                sim.write_register(register, value);
-            }
-            EmulatorCommand::ReadMemory(sim_id, start, length, mut buffer, done) => {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    return;
-                };
-                sim.read_memory(start, length, &mut buffer);
-                let _ = done.send(buffer);
-            }
-            EmulatorCommand::WriteMemory(sim_id, start, buffer, done) => {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    return;
-                };
-                sim.write_memory(start, &buffer);
-                let _ = done.send(buffer);
-            }
-            EmulatorCommand::WatchMemory(range, region) => {
-                self.watch_memory(range, region);
-            }
-            EmulatorCommand::AddBreakpoint(sim_id, address) => {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    return;
-                };
-                sim.add_breakpoint(address);
-            }
-            EmulatorCommand::RemoveBreakpoint(sim_id, address) => {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    return;
-                };
-                sim.remove_breakpoint(address);
-            }
-            EmulatorCommand::AddWatchpoint(sim_id, address, length, watch) => {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    return;
-                };
-                sim.add_watchpoint(address, length, watch);
-            }
-            EmulatorCommand::RemoveWatchpoint(sim_id, address, length, watch) => {
-                let Some(sim) = self.sims.get_mut(sim_id.to_index()) else {
-                    return;
-                };
-                sim.remove_watchpoint(address, length, watch);
+                for sim_id in SimId::values() {
+                    let index = sim_id.to_index();
+                    if self.has_game[index].load(Ordering::Acquire) {
+                        self.running[index].store(true, Ordering::Relaxed);
+                    }
+                }
             }
             EmulatorCommand::SetAudioEnabled(p1, p2) => {
                 self.audio_on[SimId::Player1.to_index()].store(p1, Ordering::Release);
@@ -648,7 +306,7 @@ impl Emulator {
             }
             EmulatorCommand::Reset(sim_id) => {
                 if let Err(error) = self.reset_sim(sim_id, None) {
-                    self.report_error(sim_id, format!("Error resetting sim: {error}"));
+                    eprintln!("error resetting sim: {}", error);
                 }
             }
             EmulatorCommand::SetKeys(sim_id, keys) => {
@@ -656,138 +314,57 @@ impl Emulator {
                     sim.set_keys(keys);
                 }
             }
-            EmulatorCommand::Exit(done) => {
-                for sim_id in SimId::values() {
-                    if let Err(error) = self.save_sram(sim_id) {
-                        self.report_error(sim_id, format!("Error saving sram on exit: {error}"));
-                    }
-                }
-                let _ = done.send(());
-            }
         }
     }
-
-    fn report_error(&self, sim_id: SimId, message: String) {
-        let messages = self
-            .messages
-            .get(&sim_id)
-            .or_else(|| self.messages.get(&SimId::Player1));
-        if let Some(msg) = messages {
-            let toast = Toast::new()
-                .kind(ToastKind::Error)
-                .options(ToastOptions::default().duration_in_seconds(5.0))
-                .text(&message);
-            if msg.send(toast).is_ok() {
-                return;
-            }
-        }
-        error!("{}", message);
-    }
 }
 
 #[derive(Debug)]
 pub enum EmulatorCommand {
-    ConnectToSim(SimId, TextureSink, mpsc::Sender<Toast>),
+    SetRenderer(SimId, TextureSink),
     LoadGame(SimId, PathBuf),
     StartSecondSim(Option<PathBuf>),
     StopSecondSim,
     Pause,
     Resume,
-    FrameAdvance,
-    StartDebugging(SimId, DebugSender),
-    StopDebugging(SimId),
-    DebugInterrupt(SimId),
-    DebugContinue(SimId),
-    DebugStep(SimId),
-    ReadRegister(SimId, VBRegister, oneshot::Sender<u32>),
-    WriteRegister(SimId, VBRegister, u32),
-    ReadMemory(SimId, u32, usize, Vec<u8>, oneshot::Sender<Vec<u8>>),
-    WriteMemory(SimId, u32, Vec<u8>, oneshot::Sender<Vec<u8>>),
-    WatchMemory(MemoryRange, Weak<MemoryRegion>),
-    AddBreakpoint(SimId, u32),
-    RemoveBreakpoint(SimId, u32),
-    AddWatchpoint(SimId, u32, usize, VBWatchpointType),
-    RemoveWatchpoint(SimId, u32, usize, VBWatchpointType),
     SetAudioEnabled(bool, bool),
     Link,
     Unlink,
     Reset(SimId),
     SetKeys(SimId, VBKey),
-    Exit(oneshot::Sender<()>),
-}
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq, NoUninit)]
-#[repr(usize)]
-pub enum SimState {
-    Uninitialized,
-    NoGame,
-    Ready,
-}
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq, NoUninit)]
-#[repr(usize)]
-pub enum EmulatorState {
-    Paused,
-    Running,
-    Stepping,
-    Debugging,
-}
-
-type DebugSender = tokio::sync::mpsc::UnboundedSender<DebugEvent>;
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum DebugStopReason {
-    // We are stepping
-    Trace,
-    // We hit a breakpoint
-    Breakpoint,
-    // We hit a watchpoint
-    Watchpoint(VBWatchpointType, u32),
-    // The debugger told us to pause
-    Paused,
-}
-
-struct DebugInfo {
-    sender: DebugSender,
-    stop_reason: Option<DebugStopReason>,
-}
-
-pub enum DebugEvent {
-    Stopped(DebugStopReason),
 }
 
 #[derive(Clone)]
 pub struct EmulatorClient {
     queue: mpsc::Sender<EmulatorCommand>,
-    sim_state: Arc<[Atomic<SimState>; 2]>,
-    state: Arc<Atomic<EmulatorState>>,
+    sim_count: Arc<AtomicUsize>,
+    running: Arc<[AtomicBool; 2]>,
+    has_game: Arc<[AtomicBool; 2]>,
     audio_on: Arc<[AtomicBool; 2]>,
     linked: Arc<AtomicBool>,
 }
 
 impl EmulatorClient {
-    pub fn sim_state(&self, sim_id: SimId) -> SimState {
-        self.sim_state[sim_id.to_index()].load(Ordering::Acquire)
+    pub fn has_player_2(&self) -> bool {
+        self.sim_count.load(Ordering::Acquire) == 2
     }
-    pub fn emulator_state(&self) -> EmulatorState {
-        self.state.load(Ordering::Acquire)
+    pub fn is_running(&self, sim_id: SimId) -> bool {
+        self.running[sim_id.to_index()].load(Ordering::Acquire)
     }
-    pub fn is_audio_enabled(&self, sim_id: SimId) -> bool {
-        self.audio_on[sim_id.to_index()].load(Ordering::Acquire)
+    pub fn has_game(&self, sim_id: SimId) -> bool {
+        self.has_game[sim_id.to_index()].load(Ordering::Acquire)
     }
     pub fn are_sims_linked(&self) -> bool {
         self.linked.load(Ordering::Acquire)
     }
-    pub fn send_command(&self, command: EmulatorCommand) -> bool {
-        match self.queue.send(command) {
-            Ok(()) => true,
-            Err(err) => {
-                warn!(
-                    "could not send command {:?} as emulator is shut down",
-                    err.0
-                );
-                false
-            }
+    pub fn is_audio_enabled(&self, sim_id: SimId) -> bool {
+        self.audio_on[sim_id.to_index()].load(Ordering::Acquire)
+    }
+    pub fn send_command(&self, command: EmulatorCommand) {
+        if let Err(err) = self.queue.send(command) {
+            eprintln!(
+                "could not send command {:?} as emulator is shut down",
+                err.0
+            );
         }
     }
 }

src/emulator/address_set.rs

@@ -1,270 +0,0 @@
-use std::{
-    collections::{BTreeMap, BTreeSet},
-    ops::Bound,
-};
-
-#[derive(Debug, Default)]
-pub struct AddressSet {
-    ranges: BTreeSet<(u32, usize)>,
-    bounds: BTreeMap<u32, usize>,
-}
-
-impl AddressSet {
-    pub fn new() -> Self {
-        Self::default()
-    }
-
-    pub fn add(&mut self, address: u32, length: usize) {
-        if length == 0 || !self.ranges.insert((address, length)) {
-            return;
-        }
-        let end = (address as usize)
-            .checked_add(length)
-            .and_then(|e| u32::try_from(e).ok());
-
-        if let Some(end) = end {
-            let val_before = self.bounds.range(..=end).next_back().map_or(0, |(_, &v)| v);
-            self.bounds.insert(end, val_before);
-        }
-
-        let val_before = self
-            .bounds
-            .range(..address)
-            .next_back()
-            .map_or(0, |(_, &v)| v);
-        if let Some(&val_at) = self.bounds.get(&address) {
-            if val_before == val_at + 1 {
-                self.bounds.remove(&address);
-            }
-        } else {
-            self.bounds.insert(address, val_before);
-        }
-
-        let start_bound = Bound::Included(address);
-        let end_bound = match end {
-            Some(e) => Bound::Excluded(e),
-            None => Bound::Unbounded,
-        };
-
-        for (_, val) in self.bounds.range_mut((start_bound, end_bound)) {
-            *val += 1;
-        }
-    }
-
-    pub fn remove(&mut self, address: u32, length: usize) {
-        if !self.ranges.remove(&(address, length)) {
-            return;
-        }
-        let end = (address as usize)
-            .checked_add(length)
-            .and_then(|e| u32::try_from(e).ok());
-
-        if let Some(end) = end {
-            let val_before = self.bounds.range(..end).next_back().map_or(0, |(_, &v)| v);
-            if let Some(&val_at) = self.bounds.get(&end) {
-                if val_at + 1 == val_before {
-                    self.bounds.remove(&end);
-                }
-            } else {
-                self.bounds.insert(end, val_before);
-            }
-        }
-
-        let val_before = self
-            .bounds
-            .range(..address)
-            .next_back()
-            .map_or(0, |(_, &v)| v);
-        if let Some(&val_at) = self.bounds.get(&address) {
-            if val_before + 1 == val_at {
-                self.bounds.remove(&address);
-            }
-        } else {
-            self.bounds.insert(address, val_before);
-        }
-
-        let start_bound = Bound::Included(address);
-        let end_bound = match end {
-            Some(e) => Bound::Excluded(e),
-            None => Bound::Unbounded,
-        };
-
-        for (_, val) in self.bounds.range_mut((start_bound, end_bound)) {
-            *val -= 1;
-        }
-    }
-
-    pub fn clear(&mut self) {
-        self.ranges.clear();
-        self.bounds.clear();
-    }
-
-    pub fn is_empty(&self) -> bool {
-        self.bounds.is_empty()
-    }
-
-    pub fn contains(&self, address: u32) -> bool {
-        self.bounds
-            .range(..=address)
-            .next_back()
-            .is_some_and(|(_, &val)| val > 0)
-    }
-
-    pub fn start_of_range_containing(&self, address: u32) -> Option<u32> {
-        if !self.contains(address) {
-            return None;
-        }
-        self.ranges
-            .range(..=(address, usize::MAX))
-            .rev()
-            .find_map(|&(start, length)| {
-                let contains = start <= address
-                    && (start as usize)
-                        .checked_add(length)
-                        .is_none_or(|end| end > address as usize);
-                contains.then_some(start)
-            })
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::AddressSet;
-
-    #[test]
-    fn should_not_include_addresses_when_empty() {
-        let set = AddressSet::new();
-        assert!(set.is_empty());
-        assert!(!set.contains(0x13374200));
-        assert_eq!(set.start_of_range_containing(0x13374200), None);
-    }
-
-    #[test]
-    fn should_include_addresses_when_full() {
-        let mut set = AddressSet::new();
-        set.add(0x00000000, 0x100000000);
-        assert!(set.contains(0x13374200));
-        assert_eq!(set.start_of_range_containing(0x13374200), Some(0x00000000));
-    }
-
-    #[test]
-    fn should_ignore_empty_address_ranges() {
-        let mut set = AddressSet::new();
-        set.add(0x13374200, 0);
-        assert!(set.is_empty());
-        assert!(!set.contains(0x13374200));
-    }
-
-    #[test]
-    fn should_add_addresses_idempotently() {
-        let mut set = AddressSet::new();
-        set.add(0x13374200, 1);
-        set.add(0x13374200, 1);
-        set.remove(0x13374200, 1);
-        assert!(set.is_empty());
-        assert!(!set.contains(0x13374200));
-    }
-
-    #[test]
-    fn should_remove_addresses_idempotently() {
-        let mut set = AddressSet::new();
-        set.add(0x13374200, 1);
-        set.remove(0x13374200, 1);
-        set.remove(0x13374200, 1);
-        assert!(set.is_empty());
-        assert!(!set.contains(0x13374200));
-    }
-
-    #[test]
-    fn should_report_address_in_range() {
-        let mut set = AddressSet::new();
-        set.add(0x13374200, 4);
-        assert!(!set.contains(0x133741ff));
-        for address in 0x13374200..0x13374204 {
-            assert!(set.contains(address));
-        }
-        assert!(!set.contains(0x13374204));
-    }
-
-    #[test]
-    fn should_allow_overlapping_addresses() {
-        let mut set = AddressSet::new();
-        set.add(0x13374200, 4);
-        set.add(0x13374201, 1);
-        set.add(0x13374202, 2);
-
-        assert!(!set.contains(0x133741ff));
-        for address in 0x13374200..0x13374204 {
-            assert!(set.contains(address));
-        }
-        assert!(!set.contains(0x13374204));
-
-        set.remove(0x13374200, 4);
-        assert!(!set.contains(0x13374200));
-        for address in 0x13374201..0x13374204 {
-            assert!(set.contains(address));
-        }
-        assert!(!set.contains(0x13374204));
-    }
-
-    #[test]
-    fn should_allow_removing_overlapped_address_ranges() {
-        let mut set = AddressSet::new();
-        set.add(0x13374200, 8);
-        set.add(0x13374204, 8);
-        set.remove(0x13374204, 8);
-
-        for address in 0x13374200..0x13374208 {
-            assert!(set.contains(address));
-        }
-        for address in 0x13374208..0x1337420c {
-            assert!(!set.contains(address));
-        }
-    }
-
-    #[test]
-    fn should_merge_adjacent_ranges() {
-        let mut set = AddressSet::new();
-        set.add(0x13374200, 4);
-        set.add(0x13374204, 4);
-        set.add(0x13374208, 4);
-        set.add(0x1337420c, 4);
-
-        assert!(!set.contains(0x133741ff));
-        for address in 0x13374200..0x13374210 {
-            assert!(set.contains(address));
-        }
-        assert!(!set.contains(0x13374210));
-
-        set.remove(0x13374200, 4);
-        set.remove(0x13374204, 4);
-        set.remove(0x13374208, 4);
-        set.remove(0x1337420c, 4);
-
-        assert!(set.is_empty());
-        for address in 0x133741ff..=0x13374210 {
-            assert!(!set.contains(address));
-        }
-    }
-
-    #[test]
-    fn should_find_start_of_range() {
-        let mut set = AddressSet::new();
-        set.add(0x13374200, 4);
-        assert_eq!(set.start_of_range_containing(0x133741ff), None);
-        for address in 0x13374200..0x13374204 {
-            assert_eq!(set.start_of_range_containing(address), Some(0x13374200));
-        }
-        assert_eq!(set.start_of_range_containing(0x13374204), None);
-    }
-
-    #[test]
-    fn should_ignore_ranges_not_containing_address() {
-        let mut set = AddressSet::new();
-        set.add(0x10000000, 1024);
-        set.add(0x30000000, 1024);
-
-        assert!(!set.contains(0x20000000));
-        assert_eq!(set.start_of_range_containing(0x20000000), None);
-    }
-}

src/emulator/shrooms_vb_core.rs

@@ -1,11 +1,8 @@
 use std::{ffi::c_void, ptr, slice};
 
-use anyhow::{Result, anyhow};
+use anyhow::{anyhow, Result};
 use bitflags::bitflags;
 use num_derive::{FromPrimitive, ToPrimitive};
-use serde::{Deserialize, Serialize};
-
-use super::address_set::AddressSet;
 
 #[repr(C)]
 struct VB {
@@ -36,7 +33,7 @@ enum VBOption {
 
 bitflags! {
     #[repr(transparent)]
-    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, Serialize, Deserialize)]
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
     pub struct VBKey: u16 {
         const PWR = 0x0001;
         const SGN = 0x0002;
@@ -57,47 +54,14 @@ bitflags! {
     }
 }
 
-#[derive(Clone, Copy, Debug)]
-pub enum VBRegister {
-    Program(u32),
-    System(u32),
-    PC,
-}
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum VBWatchpointType {
-    Read,
-    Write,
-    Access,
-}
-
-type OnExecute =
-    extern "C" fn(sim: *mut VB, address: u32, code: *const u16, length: c_int) -> c_int;
 type OnFrame = extern "C" fn(sim: *mut VB) -> c_int;
-type OnRead = extern "C" fn(
-    sim: *mut VB,
-    address: u32,
-    type_: VBDataType,
-    value: *mut i32,
-    cycles: *mut u32,
-) -> c_int;
-type OnWrite = extern "C" fn(
-    sim: *mut VB,
-    address: u32,
-    type_: VBDataType,
-    value: *mut i32,
-    cycles: *mut u32,
-    cancel: *mut c_int,
-) -> c_int;
 
 #[link(name = "vb")]
-unsafe extern "C" {
+extern "C" {
     #[link_name = "vbEmulate"]
     fn vb_emulate(sim: *mut VB, cycles: *mut u32) -> c_int;
     #[link_name = "vbEmulateEx"]
     fn vb_emulate_ex(sims: *mut *mut VB, count: c_uint, cycles: *mut u32) -> c_int;
-    #[link_name = "vbGetCartRAM"]
-    fn vb_get_cart_ram(sim: *mut VB, size: *mut u32) -> *mut c_void;
     #[link_name = "vbGetCartROM"]
     fn vb_get_cart_rom(sim: *mut VB, size: *mut u32) -> *mut c_void;
     #[link_name = "vbGetPixels"]
@@ -110,10 +74,6 @@ unsafe extern "C" {
         right_stride_x: c_int,
         right_stride_y: c_int,
     );
-    #[link_name = "vbGetProgramCounter"]
-    fn vb_get_program_counter(sim: *mut VB) -> u32;
-    #[link_name = "vbGetProgramRegister"]
-    fn vb_get_program_register(sim: *mut VB, index: c_uint) -> i32;
     #[link_name = "vbGetSamples"]
     fn vb_get_samples(
         sim: *mut VB,
@@ -121,36 +81,22 @@ unsafe extern "C" {
         capacity: *mut c_uint,
         position: *mut c_uint,
     ) -> *mut c_void;
-    #[link_name = "vbGetSystemRegister"]
-    fn vb_get_system_register(sim: *mut VB, index: c_uint) -> i32;
     #[link_name = "vbGetUserData"]
     fn vb_get_user_data(sim: *mut VB) -> *mut c_void;
     #[link_name = "vbInit"]
     fn vb_init(sim: *mut VB) -> *mut VB;
-    #[link_name = "vbRead"]
-    fn vb_read(sim: *mut VB, address: u32, typ_: VBDataType) -> i32;
     #[link_name = "vbReset"]
     fn vb_reset(sim: *mut VB);
-    #[link_name = "vbSetCartRAM"]
-    fn vb_set_cart_ram(sim: *mut VB, sram: *mut c_void, size: u32) -> c_int;
     #[link_name = "vbSetCartROM"]
     fn vb_set_cart_rom(sim: *mut VB, rom: *mut c_void, size: u32) -> c_int;
-    #[link_name = "vbSetExecuteCallback"]
-    fn vb_set_execute_callback(sim: *mut VB, callback: Option<OnExecute>) -> Option<OnExecute>;
     #[link_name = "vbSetFrameCallback"]
-    fn vb_set_frame_callback(sim: *mut VB, callback: Option<OnFrame>) -> Option<OnFrame>;
+    fn vb_set_frame_callback(sim: *mut VB, on_frame: OnFrame);
     #[link_name = "vbSetKeys"]
     fn vb_set_keys(sim: *mut VB, keys: u16) -> u16;
     #[link_name = "vbSetOption"]
     fn vb_set_option(sim: *mut VB, key: VBOption, value: c_int);
     #[link_name = "vbSetPeer"]
     fn vb_set_peer(sim: *mut VB, peer: *mut VB);
-    #[link_name = "vbSetProgramCounter"]
-    fn vb_set_program_counter(sim: *mut VB, value: u32) -> u32;
-    #[link_name = "vbSetProgramRegister"]
-    fn vb_set_program_register(sim: *mut VB, index: c_uint, value: i32) -> i32;
-    #[link_name = "vbSetReadCallback"]
-    fn vb_set_read_callback(sim: *mut VB, callback: Option<OnRead>) -> Option<OnRead>;
     #[link_name = "vbSetSamples"]
     fn vb_set_samples(
         sim: *mut VB,
@@ -158,20 +104,13 @@ unsafe extern "C" {
         typ_: VBDataType,
         capacity: c_uint,
     ) -> c_int;
-    #[link_name = "vbSetSystemRegister"]
-    fn vb_set_system_register(sim: *mut VB, index: c_uint, value: u32) -> u32;
     #[link_name = "vbSetUserData"]
     fn vb_set_user_data(sim: *mut VB, tag: *mut c_void);
-    #[link_name = "vbSetWriteCallback"]
-    fn vb_set_write_callback(sim: *mut VB, callback: Option<OnWrite>) -> Option<OnWrite>;
     #[link_name = "vbSizeOf"]
     fn vb_size_of() -> usize;
-    #[link_name = "vbWrite"]
-    fn vb_write(sim: *mut VB, address: u32, _type: VBDataType, value: i32) -> i32;
 }
 
-#[unsafe(no_mangle)]
-extern "C" fn on_frame(sim: *mut VB) -> c_int {
+extern "C" fn on_frame(sim: *mut VB) -> i32 {
     // SAFETY: the *mut VB owns its userdata.
     // There is no way for the userdata to be null or otherwise invalid.
     let data: &mut VBState = unsafe { &mut *vb_get_user_data(sim).cast() };
@@ -179,105 +118,12 @@ extern "C" fn on_frame(sim: *mut VB) -> c_int {
     1
 }
 
-#[unsafe(no_mangle)]
-extern "C" fn on_execute(sim: *mut VB, address: u32, _code: *const u16, _length: c_int) -> c_int {
-    // SAFETY: the *mut VB owns its userdata.
-    // There is no way for the userdata to be null or otherwise invalid.
-    let data: &mut VBState = unsafe { &mut *vb_get_user_data(sim).cast() };
-
-    let mut stopped = data.stop_reason.is_some();
-    if data.step_from.is_some_and(|s| s != address) {
-        data.step_from = None;
-        data.stop_reason = Some(StopReason::Stepped);
-        stopped = true;
-    }
-    if data.breakpoints.binary_search(&address).is_ok() {
-        data.stop_reason = Some(StopReason::Breakpoint);
-        stopped = true;
-    }
-
-    if stopped { 1 } else { 0 }
-}
-
-#[unsafe(no_mangle)]
-extern "C" fn on_read(
-    sim: *mut VB,
-    address: u32,
-    _type: VBDataType,
-    _value: *mut i32,
-    _cycles: *mut u32,
-) -> c_int {
-    // SAFETY: the *mut VB owns its userdata.
-    // There is no way for the userdata to be null or otherwise invalid.
-    let data: &mut VBState = unsafe { &mut *vb_get_user_data(sim).cast() };
-
-    if let Some(start) = data.read_watchpoints.start_of_range_containing(address) {
-        let watch = if data.write_watchpoints.contains(address) {
-            VBWatchpointType::Access
-        } else {
-            VBWatchpointType::Read
-        };
-        data.stop_reason = Some(StopReason::Watchpoint(watch, start));
-    }
-
-    // Don't stop here, the debugger expects us to break after the memory access.
-    // We'll stop in on_execute instead.
-    0
-}
-
-#[unsafe(no_mangle)]
-extern "C" fn on_write(
-    sim: *mut VB,
-    address: u32,
-    _type: VBDataType,
-    _value: *mut i32,
-    _cycles: *mut u32,
-    _cancel: *mut c_int,
-) -> c_int {
-    // SAFETY: the *mut VB owns its userdata.
-    // There is no way for the userdata to be null or otherwise invalid.
-    let data: &mut VBState = unsafe { &mut *vb_get_user_data(sim).cast() };
-
-    if let Some(start) = data.write_watchpoints.start_of_range_containing(address) {
-        let watch = if data.read_watchpoints.contains(address) {
-            VBWatchpointType::Access
-        } else {
-            VBWatchpointType::Write
-        };
-        data.stop_reason = Some(StopReason::Watchpoint(watch, start));
-    }
-
-    // Don't stop here, the debugger expects us to break after the memory access.
-    // We'll stop in on_execute instead.
-    0
-}
-
 const AUDIO_CAPACITY_SAMPLES: usize = 834 * 4;
 const AUDIO_CAPACITY_FLOATS: usize = AUDIO_CAPACITY_SAMPLES * 2;
 pub const EXPECTED_FRAME_SIZE: usize = 834 * 2;
 
 struct VBState {
     frame_seen: bool,
-    stop_reason: Option<StopReason>,
-    step_from: Option<u32>,
-    breakpoints: Vec<u32>,
-    read_watchpoints: AddressSet,
-    write_watchpoints: AddressSet,
-}
-
-impl VBState {
-    fn needs_execute_callback(&self) -> bool {
-        self.step_from.is_some()
-            || !self.breakpoints.is_empty()
-            || !self.read_watchpoints.is_empty()
-            || !self.write_watchpoints.is_empty()
-    }
-}
-
-pub enum StopReason {
-    Breakpoint,
-    Watchpoint(VBWatchpointType, u32),
-    Stepped,
 }
 
 #[repr(transparent)]
@@ -285,6 +131,9 @@ pub struct Sim {
     sim: *mut VB,
 }
 
+// SAFETY: the memory pointed to by sim is valid
+unsafe impl Send for Sim {}
+
 impl Sim {
     pub fn new() -> Self {
         // init the VB instance itself
@@ -293,22 +142,13 @@ impl Sim {
         let memory = vec![0u64; size.div_ceil(4)];
         let sim: *mut VB = Box::into_raw(memory.into_boxed_slice()).cast();
         unsafe { vb_init(sim) };
-        // pseudohalt is disabled due to breaking red alarm
-        unsafe { vb_set_option(sim, VBOption::PseudoHalt, 0) };
-        unsafe { vb_set_keys(sim, VBKey::SGN.bits()) };
+        unsafe { vb_set_option(sim, VBOption::PseudoHalt, 1) };
         unsafe { vb_reset(sim) };
 
         // set up userdata
-        let state = VBState {
-            frame_seen: false,
-            stop_reason: None,
-            step_from: None,
-            breakpoints: vec![],
-            read_watchpoints: AddressSet::new(),
-            write_watchpoints: AddressSet::new(),
-        };
+        let state = VBState { frame_seen: false };
         unsafe { vb_set_user_data(sim, Box::into_raw(Box::new(state)).cast()) };
-        unsafe { vb_set_frame_callback(sim, Some(on_frame)) };
+        unsafe { vb_set_frame_callback(sim, on_frame) };
 
         // set up audio buffer
         let audio_buffer = vec![0.0f32; AUDIO_CAPACITY_FLOATS];
@@ -322,58 +162,41 @@ impl Sim {
         unsafe { vb_reset(self.sim) };
     }
 
-    pub fn load_cart(&mut self, mut rom: Vec<u8>, mut sram: Vec<u8>) -> Result<()> {
-        self.unload_cart();
-
-        rom.shrink_to_fit();
-        sram.shrink_to_fit();
+    pub fn load_rom(&mut self, rom: Vec<u8>) -> Result<()> {
+        self.unload_rom();
 
         let size = rom.len() as u32;
         let rom = Box::into_raw(rom.into_boxed_slice()).cast();
         let status = unsafe { vb_set_cart_rom(self.sim, rom, size) };
-        if status != 0 {
+        if status == 0 {
+            Ok(())
+        } else {
             let _: Vec<u8> =
                 unsafe { Vec::from_raw_parts(rom.cast(), size as usize, size as usize) };
-            return Err(anyhow!("Invalid ROM size of {} bytes", size));
+            Err(anyhow!("Invalid ROM size of {} bytes", size))
         }
-
-        let size = sram.len() as u32;
-        let sram = Box::into_raw(sram.into_boxed_slice()).cast();
-        let status = unsafe { vb_set_cart_ram(self.sim, sram, size) };
-        if status != 0 {
-            let _: Vec<u8> =
-                unsafe { Vec::from_raw_parts(sram.cast(), size as usize, size as usize) };
-            return Err(anyhow!("Invalid SRAM size of {} bytes", size));
-        }
-
-        Ok(())
     }
 
-    fn unload_cart(&mut self) {
+    pub fn clone_rom(&self) -> Option<Vec<u8>> {
         let mut size = 0;
         let rom = unsafe { vb_get_cart_rom(self.sim, &mut size) };
-        unsafe { vb_set_cart_rom(self.sim, ptr::null_mut(), 0) };
-        if !rom.is_null() {
-            let _: Vec<u8> =
-                unsafe { Vec::from_raw_parts(rom.cast(), size as usize, size as usize) };
-        }
-
-        let sram = unsafe { vb_get_cart_ram(self.sim, &mut size) };
-        unsafe { vb_set_cart_ram(self.sim, ptr::null_mut(), 0) };
-        if !sram.is_null() {
-            let _: Vec<u8> =
-                unsafe { Vec::from_raw_parts(sram.cast(), size as usize, size as usize) };
+        if rom.is_null() {
+            return None;
         }
+        // SAFETY: rom definitely points to a valid array of `size` bytes
+        let slice: &[u8] = unsafe { slice::from_raw_parts(rom.cast(), size as usize) };
+        Some(slice.to_vec())
     }
 
-    pub fn read_sram(&mut self, buffer: &mut [u8]) {
+    fn unload_rom(&mut self) -> Option<Vec<u8>> {
         let mut size = 0;
-        let sram = unsafe { vb_get_cart_ram(self.sim, &mut size) };
-        if sram.is_null() {
-            return;
+        let rom = unsafe { vb_get_cart_rom(self.sim, &mut size) };
+        if rom.is_null() {
+            return None;
         }
-        let bytes = unsafe { slice::from_raw_parts(sram.cast(), size as usize) };
-        buffer.copy_from_slice(bytes);
+        unsafe { vb_set_cart_rom(self.sim, ptr::null_mut(), 0) };
+        let vec = unsafe { Vec::from_raw_parts(rom.cast(), size as usize, size as usize) };
+        Some(vec)
     }
 
     pub fn link(&mut self, peer: &mut Sim) {
@@ -397,7 +220,9 @@ impl Sim {
     }
 
     pub fn read_pixels(&mut self, buffers: &mut [u8]) -> bool {
-        let data = self.get_state();
+        // SAFETY: the *mut VB owns its userdata.
+        // There is no way for the userdata to be null or otherwise invalid.
+        let data: &mut VBState = unsafe { &mut *vb_get_user_data(self.sim).cast() };
         if !data.frame_seen {
             return false;
         }
@@ -444,167 +269,6 @@ impl Sim {
     pub fn set_keys(&mut self, keys: VBKey) {
         unsafe { vb_set_keys(self.sim, keys.bits()) };
     }
-
-    pub fn read_register(&mut self, register: VBRegister) -> u32 {
-        match register {
-            VBRegister::Program(index) => unsafe {
-                vb_get_program_register(self.sim, index) as u32
-            },
-            VBRegister::System(index) => unsafe { vb_get_system_register(self.sim, index) as u32 },
-            VBRegister::PC => unsafe { vb_get_program_counter(self.sim) },
-        }
-    }
-
-    pub fn write_register(&mut self, register: VBRegister, value: u32) {
-        match register {
-            VBRegister::Program(index) => unsafe {
-                vb_set_program_register(self.sim, index, value as i32);
-            },
-            VBRegister::System(index) => unsafe {
-                vb_set_system_register(self.sim, index, value);
-            },
-            VBRegister::PC => unsafe {
-                vb_set_program_counter(self.sim, value);
-            },
-        }
-    }
-
-    pub fn read_memory(&mut self, start: u32, length: usize, into: &mut Vec<u8>) {
-        let mut address = start;
-        for _ in 0..length {
-            let byte = unsafe { vb_read(self.sim, address, VBDataType::U8) };
-            into.push(byte as u8);
-            address = address.wrapping_add(1);
-        }
-    }
-
-    pub fn write_memory(&mut self, start: u32, buffer: &[u8]) {
-        let mut address = start;
-        for byte in buffer {
-            unsafe { vb_write(self.sim, address, VBDataType::U8, *byte as i32) };
-            address = address.wrapping_add(1);
-        }
-    }
-
-    pub fn add_breakpoint(&mut self, address: u32) {
-        let data = self.get_state();
-        if let Err(index) = data.breakpoints.binary_search(&address) {
-            data.breakpoints.insert(index, address);
-        }
-
-        unsafe {
-            vb_set_execute_callback(self.sim, Some(on_execute));
-        }
-    }
-
-    pub fn remove_breakpoint(&mut self, address: u32) {
-        let data = self.get_state();
-        if let Ok(index) = data.breakpoints.binary_search(&address) {
-            data.breakpoints.remove(index);
-            if !data.needs_execute_callback() {
-                unsafe { vb_set_execute_callback(self.sim, None) };
-            }
-        }
-    }
-
-    pub fn add_watchpoint(&mut self, address: u32, length: usize, watch: VBWatchpointType) {
-        match watch {
-            VBWatchpointType::Read => self.add_read_watchpoint(address, length),
-            VBWatchpointType::Write => self.add_write_watchpoint(address, length),
-            VBWatchpointType::Access => {
-                self.add_read_watchpoint(address, length);
-                self.add_write_watchpoint(address, length);
-            }
-        }
-    }
-
-    fn add_read_watchpoint(&mut self, address: u32, length: usize) {
-        let state = self.get_state();
-        state.read_watchpoints.add(address, length);
-        if !state.read_watchpoints.is_empty() {
-            unsafe { vb_set_read_callback(self.sim, Some(on_read)) };
-            unsafe { vb_set_execute_callback(self.sim, Some(on_execute)) };
-        }
-    }
-
-    fn add_write_watchpoint(&mut self, address: u32, length: usize) {
-        let state = self.get_state();
-        state.write_watchpoints.add(address, length);
-        if !state.write_watchpoints.is_empty() {
-            unsafe { vb_set_write_callback(self.sim, Some(on_write)) };
-            unsafe { vb_set_execute_callback(self.sim, Some(on_execute)) };
-        }
-    }
-
-    pub fn remove_watchpoint(&mut self, address: u32, length: usize, watch: VBWatchpointType) {
-        match watch {
-            VBWatchpointType::Read => self.remove_read_watchpoint(address, length),
-            VBWatchpointType::Write => self.remove_write_watchpoint(address, length),
-            VBWatchpointType::Access => {
-                self.remove_read_watchpoint(address, length);
-                self.remove_write_watchpoint(address, length);
-            }
-        }
-    }
-
-    fn remove_read_watchpoint(&mut self, address: u32, length: usize) {
-        let state = self.get_state();
-        state.read_watchpoints.remove(address, length);
-        let needs_execute = state.needs_execute_callback();
-        if state.read_watchpoints.is_empty() {
-            unsafe { vb_set_read_callback(self.sim, None) };
-            if !needs_execute {
-                unsafe { vb_set_execute_callback(self.sim, None) };
-            }
-        }
-    }
-
-    fn remove_write_watchpoint(&mut self, address: u32, length: usize) {
-        let state = self.get_state();
-        state.write_watchpoints.remove(address, length);
-        let needs_execute = state.needs_execute_callback();
-        if state.write_watchpoints.is_empty() {
-            unsafe { vb_set_write_callback(self.sim, None) };
-            if !needs_execute {
-                unsafe { vb_set_execute_callback(self.sim, None) };
-            }
-        }
-    }
-
-    pub fn step(&mut self) {
-        let current_pc = unsafe { vb_get_program_counter(self.sim) };
-        let data = self.get_state();
-        data.step_from = Some(current_pc);
-        unsafe {
-            vb_set_execute_callback(self.sim, Some(on_execute));
-        }
-    }
-
-    pub fn clear_debug_state(&mut self) {
-        let data = self.get_state();
-        data.step_from = None;
-        data.breakpoints.clear();
-        data.read_watchpoints.clear();
-        data.write_watchpoints.clear();
-        unsafe { vb_set_read_callback(self.sim, None) };
-        unsafe { vb_set_write_callback(self.sim, None) };
-        unsafe { vb_set_execute_callback(self.sim, None) };
-    }
-
-    pub fn stop_reason(&mut self) -> Option<StopReason> {
-        let data = self.get_state();
-        let reason = data.stop_reason.take();
-        if !data.needs_execute_callback() {
-            unsafe { vb_set_execute_callback(self.sim, None) };
-        }
-        reason
-    }
-
-    fn get_state(&mut self) -> &mut VBState {
-        // SAFETY: the *mut VB owns its userdata.
-        // There is no way for the userdata to be null or otherwise invalid.
-        unsafe { &mut *vb_get_user_data(self.sim).cast() }
-    }
 }
 
 impl Drop for Sim {

src/gdbserver.rs

@@ -1,560 +0,0 @@
-use anyhow::{Result, bail};
-use registers::REGISTERS;
-use request::{Request, RequestKind, RequestSource};
-use response::Response;
-use std::{
-    sync::{Arc, Mutex},
-    thread,
-};
-use tokio::{
-    io::{AsyncWriteExt as _, BufReader},
-    net::{TcpListener, TcpStream},
-    pin, select,
-    sync::{mpsc, oneshot},
-};
-use tracing::{Level, debug, enabled, error, info};
-
-use crate::emulator::{
-    DebugEvent, DebugStopReason, EmulatorClient, EmulatorCommand, SimId, VBWatchpointType,
-};
-
-mod registers;
-mod request;
-mod response;
-
-pub struct GdbServer {
-    sim_id: SimId,
-    client: EmulatorClient,
-    status: Arc<Mutex<GdbServerStatus>>,
-    killer: Option<oneshot::Sender<()>>,
-}
-
-impl GdbServer {
-    pub fn new(sim_id: SimId, client: EmulatorClient) -> Self {
-        Self {
-            sim_id,
-            client,
-            status: Arc::new(Mutex::new(GdbServerStatus::Stopped)),
-            killer: None,
-        }
-    }
-
-    pub fn status(&self) -> GdbServerStatus {
-        self.status.lock().unwrap().clone()
-    }
-
-    pub fn start(&mut self, port: u16) {
-        *self.status.lock().unwrap() = GdbServerStatus::Connecting;
-        let sim_id = self.sim_id;
-        let client = self.client.clone();
-        let status = self.status.clone();
-        let (tx, rx) = oneshot::channel();
-        self.killer = Some(tx);
-        thread::spawn(move || {
-            tokio::runtime::Builder::new_current_thread()
-                .enable_all()
-                .build()
-                .unwrap()
-                .block_on(async move {
-                    select! {
-                        _ = run_server(sim_id, client.clone(), port, &status) => {}
-                        _ = rx => {
-                            client.send_command(EmulatorCommand::StopDebugging(sim_id));
-                            *status.lock().unwrap() = GdbServerStatus::Stopped;
-                        }
-                    }
-                })
-        });
-    }
-
-    pub fn stop(&mut self) {
-        if let Some(killer) = self.killer.take() {
-            let _ = killer.send(());
-        }
-    }
-}
-
-impl Drop for GdbServer {
-    fn drop(&mut self) {
-        self.stop();
-    }
-}
-
-async fn run_server(
-    sim_id: SimId,
-    client: EmulatorClient,
-    port: u16,
-    status: &Mutex<GdbServerStatus>,
-) {
-    let (debug_sink, mut debug_source) = mpsc::unbounded_channel();
-    client.send_command(EmulatorCommand::StartDebugging(sim_id, debug_sink));
-
-    info!("Connecting to debugger on port {port}...");
-    let connect_future = try_connect(port, status);
-    pin!(connect_future);
-
-    let stream = loop {
-        select! {
-            stream = &mut connect_future => {
-                if let Some(stream) = stream {
-                    break stream;
-                } else {
-                    return;
-                }
-            }
-            event = debug_source.recv() => {
-                if event.is_none() {
-                    // The sim has stopped (or was never started)
-                    *status.lock().unwrap() = GdbServerStatus::Stopped;
-                    return;
-                }
-            }
-        }
-    };
-    info!("Connected!");
-    let mut connection = GdbConnection::new(sim_id, client);
-    match connection.run(stream, debug_source).await {
-        Ok(()) => {
-            info!("Finished debugging.");
-            *status.lock().unwrap() = GdbServerStatus::Stopped;
-        }
-        Err(error) => {
-            error!(%error, "Error from debugger.");
-            *status.lock().unwrap() = GdbServerStatus::Error(error.to_string());
-        }
-    }
-}
-
-async fn try_connect(port: u16, status: &Mutex<GdbServerStatus>) -> Option<TcpStream> {
-    *status.lock().unwrap() = GdbServerStatus::Connecting;
-    let listener = match TcpListener::bind(("127.0.0.1", port)).await {
-        Ok(l) => l,
-        Err(err) => {
-            error!(%err, "Could not open port.");
-            *status.lock().unwrap() = GdbServerStatus::Error(err.to_string());
-            return None;
-        }
-    };
-    match listener.accept().await {
-        Ok((stream, _)) => {
-            *status.lock().unwrap() = GdbServerStatus::Running;
-            Some(stream)
-        }
-        Err(err) => {
-            error!(%err, "Could not connect to debugger.");
-            *status.lock().unwrap() = GdbServerStatus::Error(err.to_string());
-            None
-        }
-    }
-}
-
-#[derive(Clone)]
-pub enum GdbServerStatus {
-    Stopped,
-    Connecting,
-    Running,
-    Error(String),
-}
-
-impl GdbServerStatus {
-    pub fn running(&self) -> bool {
-        matches!(self, Self::Connecting | Self::Running)
-    }
-}
-
-struct GdbConnection {
-    sim_id: SimId,
-    client: EmulatorClient,
-    ack_messages: bool,
-    stop_reason: Option<DebugStopReason>,
-    response_buf: Option<Vec<u8>>,
-    memory_buf: Option<Vec<u8>>,
-}
-
-impl GdbConnection {
-    fn new(sim_id: SimId, client: EmulatorClient) -> Self {
-        Self {
-            sim_id,
-            client,
-            ack_messages: true,
-            stop_reason: None,
-            response_buf: None,
-            memory_buf: None,
-        }
-    }
-    async fn run(
-        &mut self,
-        stream: TcpStream,
-        mut debug_source: mpsc::UnboundedReceiver<DebugEvent>,
-    ) -> Result<()> {
-        let (rx, mut tx) = stream.into_split();
-        let mut request_source = RequestSource::new(BufReader::new(rx));
-        loop {
-            let response = select! {
-                maybe_event = debug_source.recv() => {
-                    let Some(event) = maybe_event else {
-                        // debugger has stopped running
-                        break;
-                    };
-                    self.handle_event(event)
-                }
-                maybe_request = request_source.recv() => {
-                    let req = maybe_request?;
-                    self.handle_request(req)?
-                }
-            };
-            if let Some(res) = response {
-                let buffer = res.finish();
-                if enabled!(Level::DEBUG) {
-                    match std::str::from_utf8(&buffer) {
-                        Ok(text) => debug!("response: {text}"),
-                        Err(_) => debug!("response: {buffer:02x?}"),
-                    }
-                }
-                tx.write_all(&buffer).await?;
-                self.response_buf = Some(buffer);
-                tx.flush().await?;
-            }
-        }
-        Ok(())
-    }
-
-    fn handle_event(&mut self, event: DebugEvent) -> Option<Response> {
-        let res = match event {
-            DebugEvent::Stopped(reason) => {
-                if self.stop_reason.is_some_and(|r| r == reason) {
-                    return None;
-                }
-                self.stop_reason = Some(reason);
-                self.response()
-                    .write_str(&debug_stop_reason_string(self.stop_reason))
-            }
-        };
-        Some(res)
-    }
-
-    fn handle_request(&mut self, mut req: Request<'_>) -> Result<Option<Response>> {
-        debug!("received {:02x?}", req);
-
-        if req.kind == RequestKind::Signal {
-            self.client
-                .send_command(EmulatorCommand::DebugInterrupt(self.sim_id));
-            return Ok(None); // we'll send a message when the emulator reports it has stopped
-        }
-
-        let res = if req.match_str("QStartNoAckMode") {
-            let res = self.response().write_str("OK");
-            self.ack_messages = false;
-            res
-        } else if req.match_str("qSupported:") {
-            self.response()
-                .write_str("multiprocess+;swbreak+;vContSupported+;PacketSize=10000;SupportedWatchpointTypes=x86_64,aarch64-bas,aarch64-mask")
-        } else if req
-            .match_some_str([
-                "QThreadSuffixSupported",
-                "QListThreadsInStopReply",
-                "QEnableErrorStrings",
-            ])
-            .is_some()
-        {
-            self.response().write_str("OK")
-        } else if req.match_str("qHostInfo") {
-            self.response().write_str(&format!(
-                "triple:{};endian:little;ptrsize:4;",
-                hex::encode("v810-unknown-vb")
-            ))
-        } else if req.match_str("qProcessInfo") {
-            self.response().write_str(&format!(
-                "pid:1;triple:{};endian:little;ptrsize:4;",
-                hex::encode("v810-unknown-vb")
-            ))
-        } else if req.match_str("qRegisterInfo") {
-            let mut get_reg_info = || {
-                let register = req.match_hex::<usize>()?;
-                REGISTERS.get(register)
-            };
-            if let Some(reg_info) = get_reg_info() {
-                self.response().write_str(&reg_info.to_description())
-            } else {
-                self.response()
-            }
-        } else if req.match_str("vCont?") {
-            self.response().write_str("vCont;c;s;")
-        } else if req.match_str("qC") {
-            // The v810 has no threads, so report that the "current thread" is 1.
-            self.response().write_str("QCp1.t1")
-        } else if req.match_str("qfThreadInfo") {
-            self.response().write_str("mp1.t1")
-        } else if req.match_str("qsThreadInfo") {
-            self.response().write_str("l")
-        } else if req.match_str("k") {
-            bail!("debug process was killed");
-        } else if req.match_str("?") {
-            self.response()
-                .write_str(&debug_stop_reason_string(self.stop_reason))
-        } else if req.match_some_str(["c", "vCont;c:"]).is_some() {
-            self.client
-                .send_command(EmulatorCommand::DebugContinue(self.sim_id));
-            self.stop_reason = None;
-            // Don't send a response until we hit a breakpoint or get interrupted
-            return Ok(None);
-        } else if req.match_some_str(["s", "vCont;s:"]).is_some() {
-            self.client
-                .send_command(EmulatorCommand::DebugStep(self.sim_id));
-            self.stop_reason = None;
-            // Don't send a response until we hit a breakpoint or get interrupted
-            return Ok(None);
-        } else if req.match_str("p") {
-            let mut read_register = || {
-                let register_index = req.match_hex::<usize>()?;
-                let register = REGISTERS.get(register_index)?.to_vb_register();
-                let (tx, rx) = ::oneshot::channel();
-                self.client
-                    .send_command(EmulatorCommand::ReadRegister(self.sim_id, register, tx));
-                rx.recv().ok()
-            };
-            if let Some(value) = read_register() {
-                self.response().write_hex(value)
-            } else {
-                self.response()
-            }
-        } else if req.match_str("P") {
-            let mut write_register = || {
-                let register_index = req.match_hex::<usize>()?;
-                let register = REGISTERS.get(register_index)?.to_vb_register();
-                if !req.match_str("=") {
-                    return None;
-                }
-                let value = {
-                    let mut buffer = [0; 4];
-                    if !req.match_hex_bytes(&mut buffer) {
-                        return None;
-                    }
-                    u32::from_le_bytes(buffer)
-                };
-                self.client.send_command(EmulatorCommand::WriteRegister(
-                    self.sim_id,
-                    register,
-                    value,
-                ));
-                Some(())
-            };
-            if let Some(()) = write_register() {
-                self.response().write_str("OK")
-            } else {
-                self.response()
-            }
-        } else if let Some(op) = req.match_some_str(["m", "x"]) {
-            let mut read_memory = || {
-                let (start, length) = parse_memory_range(&mut req)?;
-                let mut buf = self.memory_buf.take().unwrap_or_default();
-                buf.clear();
-                if length == 0 {
-                    return Some(buf);
-                }
-                let (tx, rx) = ::oneshot::channel();
-                self.client.send_command(EmulatorCommand::ReadMemory(
-                    self.sim_id,
-                    start,
-                    length,
-                    buf,
-                    tx,
-                ));
-                rx.recv().ok()
-            };
-            if let Some(memory) = read_memory() {
-                let mut res = self.response();
-                if memory.is_empty() {
-                    res = res.write_str("OK");
-                } else if op == "m" {
-                    // send the hex-encoded byte stream
-                    for byte in &memory {
-                        res = res.write_hex(*byte);
-                    }
-                } else {
-                    // send the raw byte stream
-                    for byte in &memory {
-                        res = res.write_byte(*byte);
-                    }
-                }
-                self.memory_buf = Some(memory);
-                res
-            } else {
-                self.response()
-            }
-        } else if let Some(op) = req.match_some_str(["M", "X"]) {
-            let mut write_memory = || {
-                let (start, length) = parse_memory_range(&mut req)?;
-                if length == 0 {
-                    return Some(());
-                }
-                if !req.match_str(":") {
-                    return None;
-                }
-                let mut buf = self.memory_buf.take().unwrap_or_default();
-                buf.resize(length, 0);
-                let successful_read = if op == "M" {
-                    req.match_hex_bytes(&mut buf)
-                } else {
-                    req.match_bytes(&mut buf)
-                };
-                if !successful_read {
-                    self.memory_buf = Some(buf);
-                    return None;
-                }
-                let (tx, rx) = ::oneshot::channel();
-                self.client
-                    .send_command(EmulatorCommand::WriteMemory(self.sim_id, start, buf, tx));
-                let buf = rx.recv().ok()?;
-                self.memory_buf = Some(buf);
-                Some(())
-            };
-            if write_memory().is_some() {
-                self.response().write_str("OK")
-            } else {
-                self.response()
-            }
-        } else if req.match_str("Z") {
-            let mut parse_request = || {
-                let type_ = req.match_hex::<u8>()?;
-                if !req.match_str(",") {
-                    return None;
-                }
-                let address = req.match_hex()?;
-                if type_ == 0 || type_ == 1 {
-                    return Some(EmulatorCommand::AddBreakpoint(self.sim_id, address));
-                }
-                if !req.match_str(",") {
-                    return None;
-                }
-                let length = req.match_hex()?;
-                let watch = match type_ {
-                    2 => VBWatchpointType::Write,
-                    3 => VBWatchpointType::Read,
-                    4 => VBWatchpointType::Access,
-                    _ => return None,
-                };
-                Some(EmulatorCommand::AddWatchpoint(
-                    self.sim_id,
-                    address,
-                    length,
-                    watch,
-                ))
-            };
-            if let Some(command) = parse_request() {
-                self.client.send_command(command);
-                self.response().write_str("OK")
-            } else {
-                self.response()
-            }
-        } else if req.match_str("z") {
-            let mut parse_request = || {
-                let type_ = req.match_hex::<u8>()?;
-                if !req.match_str(",") {
-                    return None;
-                }
-                let address = req.match_hex()?;
-                if type_ == 0 || type_ == 1 {
-                    return Some(EmulatorCommand::RemoveBreakpoint(self.sim_id, address));
-                }
-                if !req.match_str(",") {
-                    return None;
-                }
-                let length = req.match_hex()?;
-                let watch = match type_ {
-                    2 => VBWatchpointType::Write,
-                    3 => VBWatchpointType::Read,
-                    4 => VBWatchpointType::Access,
-                    _ => return None,
-                };
-                Some(EmulatorCommand::RemoveWatchpoint(
-                    self.sim_id,
-                    address,
-                    length,
-                    watch,
-                ))
-            };
-            if let Some(command) = parse_request() {
-                self.client.send_command(command);
-                self.response().write_str("OK")
-            } else {
-                self.response()
-            }
-        } else {
-            // unrecognized command
-            self.response()
-        };
-        Ok(Some(res))
-    }
-
-    fn response(&mut self) -> Response {
-        Response::new(
-            self.response_buf.take().unwrap_or_default(),
-            self.ack_messages,
-        )
-    }
-}
-
-impl Drop for GdbConnection {
-    fn drop(&mut self) {
-        self.client
-            .send_command(EmulatorCommand::StopDebugging(self.sim_id));
-    }
-}
-
-// parse a memory range into a start and a length.
-fn parse_memory_range(req: &mut Request<'_>) -> Option<(u32, usize)> {
-    let start = req.match_hex::<u64>()?;
-    if !req.match_str(",") {
-        return None;
-    };
-    let length = req.match_hex::<usize>()?;
-    let Ok(start) = u32::try_from(start) else {
-        // The v810 has a 32-bit address space.
-        // Addresses wrap within that space, but we don't need to implement that for 64-bit addresses.
-        // Just refuse to return any info for addresses above 0xffffffff.
-        return Some((0, 0));
-    };
-    let length = length.min((u32::MAX - start) as usize + 1);
-    Some((start, length))
-}
-
-fn debug_stop_reason_string(reason: Option<DebugStopReason>) -> String {
-    let mut result = String::new();
-    result += if reason.is_some_and(|r| r != DebugStopReason::Paused) {
-        "T05;"
-    } else {
-        "T00;"
-    };
-    if let Some(DebugStopReason::Breakpoint) = reason {
-        result += "swbreak;";
-    }
-    if let Some(DebugStopReason::Watchpoint(watch, address)) = reason {
-        result += match watch {
-            VBWatchpointType::Write => "watch:",
-            VBWatchpointType::Read => "rwatch:",
-            VBWatchpointType::Access => "awatch:",
-        };
-        result += &format!("{address:08x};");
-    }
-
-    result += "thread:p1.t1;threads:p1.t1;";
-
-    if let Some(reason) = reason {
-        result += "reason:";
-        result += match reason {
-            DebugStopReason::Trace => "trace;",
-            DebugStopReason::Breakpoint => "breakpoint;",
-            DebugStopReason::Watchpoint(_, _) => "watchpoint;",
-            DebugStopReason::Paused => "trap;",
-        };
-    }
-
-    if let Some(DebugStopReason::Watchpoint(_, address)) = reason {
-        result += "description:";
-        result += &hex::encode(address.to_string());
-        result += ";";
-    }
-
-    result
-}

src/gdbserver/registers.rs

@@ -1,130 +0,0 @@
-use crate::emulator::VBRegister;
-
-pub struct RegisterInfo {
-    dwarf: u32,
-    name: &'static str,
-    set: &'static str,
-    alt_name: Option<&'static str>,
-    generic: Option<&'static str>,
-}
-
-impl RegisterInfo {
-    pub fn to_description(&self) -> String {
-        let mut string = format!("name:{}", self.name);
-        if let Some(alt) = self.alt_name {
-            string.push_str(&format!(";alt-name:{}", alt));
-        }
-        string.push_str(&format!(
-            ";bitsize:32;offset:{};encoding:uint;format:hex;set:{};dwarf:{}",
-            self.dwarf * 4,
-            self.set,
-            self.dwarf
-        ));
-        if let Some(generic) = self.generic {
-            string.push_str(&format!(";generic:{}", generic));
-        }
-        string
-    }
-
-    pub fn to_vb_register(&self) -> VBRegister {
-        match self.dwarf {
-            0..32 => VBRegister::Program(self.dwarf),
-            32..40 => VBRegister::System(self.dwarf - 32),
-            40..42 => VBRegister::System(self.dwarf - 16),
-            42..45 => VBRegister::System(self.dwarf - 13),
-            45 => VBRegister::PC,
-            other => panic!("unexpected DWARF register {other}"),
-        }
-    }
-}
-
-macro_rules! register {
-    ($set:expr, $dwarf:expr, $name:expr) => {
-        RegisterInfo {
-            dwarf: $dwarf,
-            name: $name,
-            set: $set,
-            alt_name: None,
-            generic: None,
-        }
-    };
-    ($set:expr, $dwarf:expr, $name:expr, alt: $alt:expr) => {
-        RegisterInfo {
-            dwarf: $dwarf,
-            name: $name,
-            set: $set,
-            alt_name: Some($alt),
-            generic: None,
-        }
-    };
-    ($set:expr, $dwarf:expr, $name:expr, generic: $generic:expr) => {
-        RegisterInfo {
-            dwarf: $dwarf,
-            name: $name,
-            set: $set,
-            alt_name: None,
-            generic: Some($generic),
-        }
-    };
-    ($set:expr, $dwarf:expr, $name:expr, alt: $alt:expr, generic: $generic:expr) => {
-        RegisterInfo {
-            dwarf: $dwarf,
-            name: $name,
-            set: $set,
-            alt_name: Some($alt),
-            generic: Some($generic),
-        }
-    };
-}
-
-const GENERAL: &str = "General Purpose Registers";
-const SPECIAL: &str = "Special Registers";
-
-pub const REGISTERS: [RegisterInfo; 46] = [
-    register!(GENERAL, 0, "r0"),
-    register!(GENERAL, 1, "r1"),
-    register!(GENERAL, 2, "fp", alt: "r2", generic: "fp"),
-    register!(GENERAL, 3, "sp", alt: "r3", generic: "sp"),
-    register!(GENERAL, 4, "gp", alt: "r4"),
-    register!(GENERAL, 5, "tp", alt: "r5"),
-    register!(GENERAL, 6, "r6", generic: "arg1"),
-    register!(GENERAL, 7, "r7", generic: "arg2"),
-    register!(GENERAL, 8, "r8", generic: "arg3"),
-    register!(GENERAL, 9, "r9", generic: "arg4"),
-    register!(GENERAL, 10, "r10"),
-    register!(GENERAL, 11, "r11"),
-    register!(GENERAL, 12, "r12"),
-    register!(GENERAL, 13, "r13"),
-    register!(GENERAL, 14, "r14"),
-    register!(GENERAL, 15, "r15"),
-    register!(GENERAL, 16, "r16"),
-    register!(GENERAL, 17, "r17"),
-    register!(GENERAL, 18, "r18"),
-    register!(GENERAL, 19, "r19"),
-    register!(GENERAL, 20, "r20"),
-    register!(GENERAL, 21, "r21"),
-    register!(GENERAL, 22, "r22"),
-    register!(GENERAL, 23, "r23"),
-    register!(GENERAL, 24, "r24"),
-    register!(GENERAL, 25, "r25"),
-    register!(GENERAL, 26, "r26"),
-    register!(GENERAL, 27, "r27"),
-    register!(GENERAL, 28, "r28"),
-    register!(GENERAL, 29, "r29"),
-    register!(GENERAL, 30, "r30"),
-    register!(GENERAL, 31, "lp", alt: "r31", generic: "ra"),
-    register!(SPECIAL, 32, "eipc", alt: "sr0"),
-    register!(SPECIAL, 33, "eipsw", alt: "sr1"),
-    register!(SPECIAL, 34, "fepc", alt: "sr2"),
-    register!(SPECIAL, 35, "fepsw", alt: "sr3"),
-    register!(SPECIAL, 36, "ecr", alt: "sr4"),
-    register!(SPECIAL, 37, "psw", alt: "sr5", generic: "flags"),
-    register!(SPECIAL, 38, "pir", alt: "sr6"),
-    register!(SPECIAL, 39, "tkcw", alt: "sr7"),
-    register!(SPECIAL, 40, "chcw", alt: "sr24"),
-    register!(SPECIAL, 41, "adtre", alt: "sr25"),
-    register!(SPECIAL, 42, "sr29"),
-    register!(SPECIAL, 43, "sr30"),
-    register!(SPECIAL, 44, "sr31"),
-    register!(SPECIAL, 45, "pc", generic: "pc"),
-];

src/gdbserver/request.rs

@@ -1,202 +0,0 @@
-use anyhow::{Result, bail};
-use atoi::FromRadix16;
-use tokio::io::{AsyncRead, AsyncReadExt as _};
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum RequestKind {
-    Signal,
-    Command,
-}
-impl RequestKind {
-    fn name(self) -> &'static str {
-        match self {
-            Self::Signal => "Signal",
-            Self::Command => "Command",
-        }
-    }
-}
-
-pub struct Request<'a> {
-    pub kind: RequestKind,
-    buffer: &'a [u8],
-}
-
-impl std::fmt::Debug for Request<'_> {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let mut ds = f.debug_tuple(self.kind.name());
-        match self.kind {
-            RequestKind::Signal => ds.field(&self.buffer),
-            RequestKind::Command => match std::str::from_utf8(self.buffer) {
-                Ok(str) => ds.field(&str),
-                Err(_) => ds.field(&self.buffer),
-            },
-        };
-        ds.finish()
-    }
-}
-
-impl Request<'_> {
-    pub fn match_str(&mut self, prefix: &str) -> bool {
-        if let Some(new_buffer) = self.buffer.strip_prefix(prefix.as_bytes()) {
-            self.buffer = new_buffer;
-            return true;
-        }
-        false
-    }
-
-    pub fn match_some_str<'a, I: IntoIterator<Item = &'a str>>(
-        &mut self,
-        prefixes: I,
-    ) -> Option<&'a str> {
-        prefixes.into_iter().find(|&prefix| self.match_str(prefix))
-    }
-
-    pub fn match_hex<I: FromRadix16>(&mut self) -> Option<I> {
-        match I::from_radix_16(self.buffer) {
-            (_, 0) => None,
-            (val, used) => {
-                self.buffer = self.buffer.split_at(used).1;
-                Some(val)
-            }
-        }
-    }
-
-    pub fn match_hex_bytes(&mut self, buffer: &mut [u8]) -> bool {
-        if self.buffer.len() < buffer.len() * 2 {
-            return false;
-        }
-        for (i, item) in buffer.iter_mut().enumerate() {
-            match u8::from_radix_16(&self.buffer[(i * 2)..(i * 2) + 2]) {
-                (byte, 2) => *item = byte,
-                _ => return false,
-            };
-        }
-        self.buffer = self.buffer.split_at(buffer.len()).1;
-        true
-    }
-
-    pub fn match_bytes(&mut self, buffer: &mut [u8]) -> bool {
-        if self.buffer.len() < buffer.len() {
-            return false;
-        }
-        buffer.copy_from_slice(&self.buffer[0..buffer.len()]);
-        self.buffer = self.buffer.split_at(buffer.len()).1;
-        true
-    }
-}
-
-pub struct RequestSource<R> {
-    reader: R,
-    buffer: Vec<u8>,
-    state: RequestReadState,
-}
-
-impl<R: AsyncRead + Unpin> RequestSource<R> {
-    pub fn new(reader: R) -> Self {
-        Self {
-            reader,
-            buffer: vec![],
-            state: RequestReadState::Header,
-        }
-    }
-
-    pub async fn recv(&mut self) -> Result<Request<'_>> {
-        let mut char = self.reader.read_u8().await?;
-        if matches!(self.state, RequestReadState::Start) {
-            self.buffer.clear();
-            self.state = RequestReadState::Header;
-        }
-        if matches!(self.state, RequestReadState::Header) {
-            // Just ignore positive acks
-            while char == b'+' {
-                char = self.reader.read_u8().await?;
-            }
-            if char == b'-' {
-                bail!("no support for negative acks");
-            }
-            if char == 0x03 {
-                // This is how the client "cancels an in-flight request"
-                self.buffer.push(char);
-                self.state = RequestReadState::Start;
-                return Ok(Request {
-                    kind: RequestKind::Signal,
-                    buffer: &self.buffer,
-                });
-            }
-            if char != b'$' {
-                // Messages are supposed to start with a dollar sign
-                bail!("malformed message");
-            }
-            self.state = RequestReadState::Body {
-                checksum: 0,
-                escaping: false,
-            };
-            char = self.reader.read_u8().await?;
-        }
-        while let RequestReadState::Body { checksum, escaping } = &mut self.state {
-            if char == b'#' && !*escaping {
-                self.state = RequestReadState::Checksum {
-                    expected: *checksum,
-                    actual: 0,
-                    digits: 0,
-                };
-                char = self.reader.read_u8().await?;
-                break;
-            }
-            *checksum = checksum.wrapping_add(char);
-
-            if *escaping {
-                // escaped character
-                self.buffer.push(char ^ 0x20);
-                *escaping = false;
-            } else if char == b'}' {
-                // next character will be escaped
-                *escaping = true;
-            } else {
-                self.buffer.push(char);
-            }
-            char = self.reader.read_u8().await?;
-        }
-        while let RequestReadState::Checksum {
-            expected,
-            actual,
-            digits,
-        } = &mut self.state
-        {
-            let digit = match char {
-                b'0'..=b'9' => char - b'0',
-                b'a'..=b'f' => char - b'a' + 10,
-                b'A'..=b'F' => char - b'A' + 10,
-                _ => bail!("invalid checksum"),
-            };
-            *actual = (*actual << 4) + digit;
-            *digits += 1;
-            if *digits == 2 {
-                if *expected != *actual {
-                    bail!("mismatched checksum");
-                }
-                self.state = RequestReadState::Start;
-                return Ok(Request {
-                    kind: RequestKind::Command,
-                    buffer: &self.buffer,
-                });
-            }
-            char = self.reader.read_u8().await?;
-        }
-        unreachable!();
-    }
-}
-
-enum RequestReadState {
-    Start,
-    Header,
-    Body {
-        checksum: u8,
-        escaping: bool,
-    },
-    Checksum {
-        expected: u8,
-        actual: u8,
-        digits: u8,
-    },
-}

src/gdbserver/response.rs

@@ -1,63 +0,0 @@
-use num_traits::ToBytes;
-
-pub struct Response {
-    buffer: Vec<u8>,
-    checksum: u8,
-}
-
-impl Response {
-    pub fn new(mut buffer: Vec<u8>, ack: bool) -> Self {
-        buffer.clear();
-        if ack {
-            buffer.push(b'+');
-        }
-        buffer.push(b'$');
-        Self {
-            buffer,
-            checksum: 0,
-        }
-    }
-
-    pub fn write_str(self, str: &str) -> Self {
-        let mut me = self;
-        for byte in str.as_bytes() {
-            me = me.write_byte(*byte);
-        }
-        me
-    }
-
-    pub fn write_byte(mut self, byte: u8) -> Self {
-        if byte == b'}' || byte == b'#' || byte == b'$' || byte == b'*' {
-            self.buffer.push(b'}');
-            self.checksum = self.checksum.wrapping_add(b'}');
-            let escaped = byte ^ 0x20;
-            self.buffer.push(escaped);
-            self.checksum = self.checksum.wrapping_add(escaped);
-        } else {
-            self.buffer.push(byte);
-            self.checksum = self.checksum.wrapping_add(byte);
-        }
-        self
-    }
-
-    pub fn write_hex<T: ToBytes>(mut self, value: T) -> Self {
-        for byte in value.to_le_bytes().as_ref() {
-            for digit in [(byte >> 4), (byte & 0xf)] {
-                let char = if digit > 9 {
-                    b'a' + digit - 10
-                } else {
-                    b'0' + digit
-                };
-                self.buffer.push(char);
-                self.checksum = self.checksum.wrapping_add(char);
-            }
-        }
-        self
-    }
-
-    pub fn finish(mut self) -> Vec<u8> {
-        let checksum = self.checksum;
-        self.buffer.push(b'#');
-        self.write_hex(checksum).buffer
-    }
-}

src/graphics.rs

@@ -1,13 +1,12 @@
 use std::{
     sync::{
-        Arc, Mutex, MutexGuard,
         atomic::{AtomicU64, Ordering},
-        mpsc,
+        mpsc, Arc, Mutex, MutexGuard,
     },
     thread,
 };
 
-use anyhow::{Result, bail};
+use anyhow::{bail, Result};
 use itertools::Itertools as _;
 use wgpu::{
     Device, Extent3d, ImageCopyTexture, ImageDataLayout, Origin3d, Queue, Texture,
@@ -65,7 +64,9 @@ impl TextureSink {
             sample_count: 1,
             dimension: wgpu::TextureDimension::D2,
             format: TextureFormat::Rg8Unorm,
-            usage: TextureUsages::COPY_DST | TextureUsages::TEXTURE_BINDING,
+            usage: TextureUsages::COPY_SRC
+                | TextureUsages::COPY_DST
+                | TextureUsages::TEXTURE_BINDING,
             view_formats: &[TextureFormat::Rg8Unorm],
         };
         device.create_texture(&desc)

src/images.rs

@@ -1,328 +0,0 @@
-use std::{
-    collections::HashMap,
-    ops::Deref,
-    sync::{Arc, Mutex, Weak},
-    thread,
-    time::Duration,
-};
-
-use egui::{
-    Color32, ColorImage, TextureHandle, TextureOptions,
-    epaint::ImageDelta,
-    load::{LoadError, SizedTexture, TextureLoader, TexturePoll},
-};
-use tokio::{sync::mpsc, time::timeout};
-
-pub struct ImageProcessor {
-    sender: mpsc::UnboundedSender<Box<dyn ImageRendererImpl>>,
-}
-
-impl ImageProcessor {
-    pub fn new() -> Self {
-        let (sender, receiver) = mpsc::unbounded_channel();
-        thread::spawn(move || {
-            tokio::runtime::Builder::new_current_thread()
-                .enable_all()
-                .build()
-                .unwrap()
-                .block_on(async move {
-                    let mut worker = ImageProcessorWorker {
-                        receiver,
-                        renderers: vec![],
-                    };
-                    worker.run().await
-                })
-        });
-        Self { sender }
-    }
-
-    pub fn add<const N: usize, R: ImageRenderer<N> + 'static>(
-        &self,
-        renderer: R,
-        params: R::Params,
-    ) -> ([ImageHandle; N], ImageParams<R::Params>) {
-        let states = renderer.sizes().map(ImageState::new);
-        let handles = states.clone().map(|state| ImageHandle {
-            size: state.size.map(|i| i as f32),
-            data: state.sink,
-        });
-        let images = renderer
-            .sizes()
-            .map(|[width, height]| ImageBuffer::new(width, height));
-        let sink = Arc::new(Mutex::new(params.clone()));
-        let _ = self.sender.send(Box::new(ImageRendererWrapper {
-            renderer,
-            params: Arc::downgrade(&sink),
-            images,
-            states,
-        }));
-        let params = ImageParams {
-            value: params,
-            sink,
-        };
-        (handles, params)
-    }
-}
-
-struct ImageProcessorWorker {
-    receiver: mpsc::UnboundedReceiver<Box<dyn ImageRendererImpl>>,
-    renderers: Vec<Box<dyn ImageRendererImpl>>,
-}
-
-impl ImageProcessorWorker {
-    async fn run(&mut self) {
-        loop {
-            if self.renderers.is_empty() {
-                // if we have nothing to do, block until we have something to do
-                if self.receiver.recv_many(&mut self.renderers, 64).await == 0 {
-                    // shutdown
-                    return;
-                }
-                while let Ok(renderer) = self.receiver.try_recv() {
-                    self.renderers.push(renderer);
-                }
-            }
-            self.renderers
-                .retain_mut(|renderer| renderer.try_update().is_ok());
-            // wait up to 10 ms for more renderers
-            if timeout(
-                Duration::from_millis(10),
-                self.receiver.recv_many(&mut self.renderers, 64),
-            )
-            .await
-            .is_ok()
-            {
-                while let Ok(renderer) = self.receiver.try_recv() {
-                    self.renderers.push(renderer);
-                }
-            }
-        }
-    }
-}
-
-pub struct ImageBuffer {
-    pub size: [usize; 2],
-    pub pixels: Vec<Color32>,
-}
-
-impl ImageBuffer {
-    pub fn new(width: usize, height: usize) -> Self {
-        Self {
-            size: [width, height],
-            pixels: vec![Color32::BLACK; width * height],
-        }
-    }
-
-    pub fn clear(&mut self) {
-        for pixel in self.pixels.iter_mut() {
-            *pixel = Color32::BLACK;
-        }
-    }
-
-    pub fn write(&mut self, coords: (usize, usize), pixel: Color32) {
-        self.pixels[coords.1 * self.size[0] + coords.0] = pixel;
-    }
-
-    pub fn add(&mut self, coords: (usize, usize), pixel: Color32) {
-        let index = coords.1 * self.size[0] + coords.0;
-        let old = self.pixels[index];
-        self.pixels[index] = Color32::from_rgb(
-            old.r() + pixel.r(),
-            old.g() + pixel.g(),
-            old.b() + pixel.b(),
-        );
-    }
-
-    pub fn changed(&self, image: &ColorImage) -> bool {
-        image.pixels.iter().zip(&self.pixels).any(|(a, b)| a != b)
-    }
-
-    pub fn read(&self, image: &mut ColorImage) {
-        image.pixels.copy_from_slice(&self.pixels);
-    }
-}
-
-#[derive(Clone)]
-pub struct ImageHandle {
-    size: [f32; 2],
-    data: Arc<Mutex<Option<Arc<ColorImage>>>>,
-}
-
-impl ImageHandle {
-    fn pull(&mut self) -> Option<Arc<ColorImage>> {
-        self.data.lock().unwrap().take()
-    }
-}
-
-pub struct ImageParams<T> {
-    value: T,
-    sink: Arc<Mutex<T>>,
-}
-
-impl<T> Deref for ImageParams<T> {
-    type Target = T;
-
-    fn deref(&self) -> &Self::Target {
-        &self.value
-    }
-}
-
-impl<T: Clone + Eq> ImageParams<T> {
-    pub fn write(&mut self, value: T) {
-        if self.value != value {
-            self.value = value.clone();
-            *self.sink.lock().unwrap() = value;
-        }
-    }
-}
-
-pub trait ImageRenderer<const N: usize>: Send {
-    type Params: Clone + Send;
-    fn sizes(&self) -> [[usize; 2]; N];
-    fn render(&mut self, params: &Self::Params, images: &mut [ImageBuffer; N]);
-}
-
-#[derive(Clone)]
-struct ImageState {
-    size: [usize; 2],
-    buffers: [Arc<ColorImage>; 2],
-    last_buffer: usize,
-    sink: Arc<Mutex<Option<Arc<ColorImage>>>>,
-}
-
-impl ImageState {
-    fn new(size: [usize; 2]) -> Self {
-        let buffers = [
-            Arc::new(ColorImage::new(size, Color32::BLACK)),
-            Arc::new(ColorImage::new(size, Color32::BLACK)),
-        ];
-        let sink = buffers[0].clone();
-        Self {
-            size,
-            buffers,
-            last_buffer: 0,
-            sink: Arc::new(Mutex::new(Some(sink))),
-        }
-    }
-    fn try_send_update(&mut self, image: &ImageBuffer) {
-        let last = &self.buffers[self.last_buffer];
-        if !image.changed(last) {
-            return;
-        }
-
-        let next_buffer = (self.last_buffer + 1) % self.buffers.len();
-        let next = &mut self.buffers[next_buffer];
-        image.read(Arc::make_mut(next));
-        self.last_buffer = next_buffer;
-        self.sink.lock().unwrap().replace(next.clone());
-    }
-}
-
-struct ImageRendererWrapper<const N: usize, R: ImageRenderer<N>> {
-    renderer: R,
-    params: Weak<Mutex<R::Params>>,
-    images: [ImageBuffer; N],
-    states: [ImageState; N],
-}
-
-trait ImageRendererImpl: Send {
-    fn try_update(&mut self) -> Result<(), ()>;
-}
-
-impl<const N: usize, R: ImageRenderer<N> + Send> ImageRendererImpl for ImageRendererWrapper<N, R> {
-    fn try_update(&mut self) -> Result<(), ()> {
-        let params = match self.params.upgrade() {
-            Some(params) => params.lock().unwrap().clone(),
-            None => {
-                // the UI isn't using this anymore
-                return Err(());
-            }
-        };
-        self.renderer.render(&params, &mut self.images);
-
-        for (state, image) in self.states.iter_mut().zip(&self.images) {
-            state.try_send_update(image);
-        }
-        Ok(())
-    }
-}
-
-pub struct ImageTextureLoader {
-    cache: Mutex<HashMap<String, (ImageHandle, Option<TextureHandle>)>>,
-}
-
-impl ImageTextureLoader {
-    pub fn new(renderers: impl IntoIterator<Item = (String, ImageHandle)>) -> Self {
-        let mut cache = HashMap::new();
-        for (key, image) in renderers {
-            cache.insert(key, (image, None));
-        }
-        Self {
-            cache: Mutex::new(cache),
-        }
-    }
-}
-
-impl TextureLoader for ImageTextureLoader {
-    fn id(&self) -> &str {
-        concat!(module_path!(), "ImageTextureLoader")
-    }
-
-    fn load(
-        &self,
-        ctx: &egui::Context,
-        uri: &str,
-        texture_options: TextureOptions,
-        _size_hint: egui::SizeHint,
-    ) -> Result<TexturePoll, LoadError> {
-        let mut cache = self.cache.lock().unwrap();
-        let Some((image, maybe_handle)) = cache.get_mut(uri) else {
-            return Err(LoadError::NotSupported);
-        };
-        if texture_options != TextureOptions::NEAREST {
-            return Err(LoadError::Loading(
-                "Only TextureOptions::NEAREST are supported".into(),
-            ));
-        }
-        match (image.pull(), maybe_handle.as_ref()) {
-            (Some(update), Some(handle)) => {
-                let delta = ImageDelta::full(update, texture_options);
-                ctx.tex_manager().write().set(handle.id(), delta);
-                let texture = SizedTexture::new(handle, image.size);
-                Ok(TexturePoll::Ready { texture })
-            }
-            (Some(update), None) => {
-                let handle = ctx.load_texture(uri, update, texture_options);
-                let texture = SizedTexture::new(&handle, image.size);
-                maybe_handle.replace(handle);
-                Ok(TexturePoll::Ready { texture })
-            }
-            (None, Some(handle)) => {
-                let texture = SizedTexture::new(handle, image.size);
-                Ok(TexturePoll::Ready { texture })
-            }
-            (None, None) => {
-                let size = image.size.into();
-                Ok(TexturePoll::Pending { size: Some(size) })
-            }
-        }
-    }
-
-    fn forget(&self, uri: &str) {
-        let _ = uri;
-    }
-
-    fn forget_all(&self) {}
-
-    fn byte_size(&self) -> usize {
-        self.cache
-            .lock()
-            .unwrap()
-            .values()
-            .map(|(image, _)| {
-                let [width, height] = image.size;
-                width as usize * height as usize * 4
-            })
-            .sum()
-    }
-}

src/input.rs

@@ -1,42 +1,16 @@
 use std::{
-    cmp::Ordering,
-    collections::{HashMap, HashSet, hash_map::Entry},
-    fmt::Display,
-    str::FromStr,
-    sync::{Arc, Mutex, RwLock},
+    collections::{hash_map::Entry, HashMap},
+    sync::{Arc, RwLock},
 };
 
-use anyhow::anyhow;
-use egui::{Key, KeyboardShortcut, Modifiers};
-use gilrs::{Axis, Button, Gamepad, GamepadId, ev::Code};
-use serde::{Deserialize, Serialize};
+use gilrs::{ev::Code, Axis, Button, Gamepad, GamepadId};
 use winit::keyboard::{KeyCode, PhysicalKey};
 
-use crate::{
-    emulator::{SimId, VBKey},
-    persistence::Persistence,
-};
+use crate::emulator::{SimId, VBKey};
 
-#[derive(Clone, PartialEq, Eq, Hash)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash)]
 struct DeviceId(u16, u16);
 
-impl FromStr for DeviceId {
-    type Err = anyhow::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let mut ids = s.split("-");
-        let vendor_id: u16 = ids.next().ok_or(anyhow!("missing vendor id"))?.parse()?;
-        let product_id: u16 = ids.next().ok_or(anyhow!("missing product id"))?.parse()?;
-        Ok(Self(vendor_id, product_id))
-    }
-}
-
-impl Display for DeviceId {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.write_fmt(format_args!("{}-{}", self.0, self.1))
-    }
-}
-
 #[derive(Clone)]
 pub struct GamepadInfo {
     pub id: GamepadId,
@@ -52,7 +26,6 @@ pub trait Mappings {
     fn use_default_mappings(&mut self);
 }
 
-#[derive(Serialize, Deserialize)]
 pub struct GamepadMapping {
     buttons: HashMap<Code, VBKey>,
     axes: HashMap<Code, (VBKey, VBKey)>,
@@ -116,30 +89,6 @@ impl GamepadMapping {
             .or_insert((VBKey::empty(), VBKey::empty()));
         entry.1 = entry.1.union(key);
     }
-
-    fn save_mappings(&self) -> PersistedGamepadMapping {
-        fn flatten<V: Copy>(values: &HashMap<Code, V>) -> Vec<(Code, V)> {
-            values.iter().map(|(k, v)| (*k, *v)).collect()
-        }
-        PersistedGamepadMapping {
-            buttons: flatten(&self.buttons),
-            axes: flatten(&self.axes),
-            default_buttons: flatten(&self.default_buttons),
-            default_axes: flatten(&self.default_axes),
-        }
-    }
-
-    fn from_mappings(mappings: &PersistedGamepadMapping) -> Self {
-        fn unflatten<V: Copy>(values: &[(Code, V)]) -> HashMap<Code, V> {
-            values.iter().map(|(k, v)| (*k, *v)).collect()
-        }
-        Self {
-            buttons: unflatten(&mappings.buttons),
-            axes: unflatten(&mappings.axes),
-            default_buttons: unflatten(&mappings.default_buttons),
-            default_axes: unflatten(&mappings.default_axes),
-        }
-    }
 }
 
 impl Mappings for GamepadMapping {
@@ -209,16 +158,6 @@ impl InputMapping {
         let entry = self.keys.entry(keyboard_key).or_insert(VBKey::empty());
         *entry = entry.union(key);
     }
-
-    fn save_mappings(&self) -> PersistedKeyboardMapping {
-        PersistedKeyboardMapping {
-            keys: self.keys.iter().map(|(k, v)| (*k, *v)).collect(),
-        }
-    }
-
-    fn restore_mappings(&mut self, persisted: &PersistedKeyboardMapping) {
-        self.keys = persisted.keys.iter().map(|(k, v)| (*k, *v)).collect();
-    }
 }
 
 impl Mappings for InputMapping {
@@ -271,42 +210,25 @@ impl Mappings for InputMapping {
 
 #[derive(Clone)]
 pub struct MappingProvider {
-    persistence: Persistence,
     device_mappings: Arc<RwLock<HashMap<DeviceId, Arc<RwLock<GamepadMapping>>>>>,
     sim_mappings: HashMap<SimId, Arc<RwLock<InputMapping>>>,
     gamepad_info: Arc<RwLock<HashMap<GamepadId, GamepadInfo>>>,
 }
 
 impl MappingProvider {
-    pub fn new(persistence: Persistence) -> Self {
-        let mut sim_mappings = HashMap::new();
-        let mut device_mappings = HashMap::new();
+    pub fn new() -> Self {
+        let mut mappings = HashMap::new();
 
         let mut p1_mappings = InputMapping::default();
-        let mut p2_mappings = InputMapping::default();
+        p1_mappings.use_default_mappings();
+        let p2_mappings = InputMapping::default();
 
-        if let Ok(persisted) = persistence.load_config::<PersistedInputMappings>("mappings") {
-            p1_mappings.restore_mappings(&persisted.p1_keyboard);
-            p2_mappings.restore_mappings(&persisted.p2_keyboard);
-
-            for (device_id, mappings) in persisted.gamepads {
-                let Ok(device_id) = device_id.parse::<DeviceId>() else {
-                    continue;
-                };
-                let gamepad = GamepadMapping::from_mappings(&mappings);
-                device_mappings.insert(device_id, Arc::new(RwLock::new(gamepad)));
-            }
-        } else {
-            p1_mappings.use_default_mappings();
-        }
-
-        sim_mappings.insert(SimId::Player1, Arc::new(RwLock::new(p1_mappings)));
-        sim_mappings.insert(SimId::Player2, Arc::new(RwLock::new(p2_mappings)));
+        mappings.insert(SimId::Player1, Arc::new(RwLock::new(p1_mappings)));
+        mappings.insert(SimId::Player2, Arc::new(RwLock::new(p2_mappings)));
         Self {
-            persistence,
-            device_mappings: Arc::new(RwLock::new(device_mappings)),
+            device_mappings: Arc::new(RwLock::new(HashMap::new())),
             gamepad_info: Arc::new(RwLock::new(HashMap::new())),
-            sim_mappings,
+            sim_mappings: mappings,
         }
     }
 
@@ -316,7 +238,7 @@ impl MappingProvider {
 
     pub fn for_gamepad(&self, gamepad_id: GamepadId) -> Option<Arc<RwLock<GamepadMapping>>> {
         let lock = self.gamepad_info.read().unwrap();
-        let device_id = lock.get(&gamepad_id)?.device_id.clone();
+        let device_id = lock.get(&gamepad_id)?.device_id;
         drop(lock);
         let lock = self.device_mappings.read().unwrap();
         lock.get(&device_id).cloned()
@@ -328,7 +250,7 @@ impl MappingProvider {
             gamepad.product_id().unwrap_or_default(),
         );
         let mut lock = self.device_mappings.write().unwrap();
-        let mappings = match lock.entry(device_id.clone()) {
+        let mappings = match lock.entry(device_id) {
             Entry::Vacant(entry) => {
                 let mappings = GamepadMapping::for_gamepad(gamepad);
                 entry.insert(Arc::new(RwLock::new(mappings)))
@@ -381,7 +303,7 @@ impl MappingProvider {
             return;
         };
         info.bound_to = Some(sim_id);
-        let device_id = info.device_id.clone();
+        let device_id = info.device_id;
         drop(lock);
         let Some(device_mappings) = self
             .device_mappings
@@ -419,242 +341,4 @@ impl MappingProvider {
             .cloned()
             .collect()
     }
-
-    pub fn save(&self) {
-        let p1_keyboard = self.for_sim(SimId::Player1).read().unwrap().save_mappings();
-        let p2_keyboard = self.for_sim(SimId::Player2).read().unwrap().save_mappings();
-        let mut gamepads = HashMap::new();
-        for (device_id, gamepad) in self.device_mappings.read().unwrap().iter() {
-            let mapping = gamepad.read().unwrap().save_mappings();
-            gamepads.insert(device_id.to_string(), mapping);
-        }
-        let persisted = PersistedInputMappings {
-            p1_keyboard,
-            p2_keyboard,
-            gamepads,
-        };
-        let _ = self.persistence.save_config("mappings", &persisted);
-    }
-}
-
-#[derive(Serialize, Deserialize)]
-struct PersistedInputMappings {
-    p1_keyboard: PersistedKeyboardMapping,
-    p2_keyboard: PersistedKeyboardMapping,
-    gamepads: HashMap<String, PersistedGamepadMapping>,
-}
-
-#[derive(Serialize, Deserialize)]
-struct PersistedKeyboardMapping {
-    keys: Vec<(PhysicalKey, VBKey)>,
-}
-
-#[derive(Serialize, Deserialize)]
-struct PersistedGamepadMapping {
-    buttons: Vec<(Code, VBKey)>,
-    axes: Vec<(Code, (VBKey, VBKey))>,
-    default_buttons: Vec<(Code, VBKey)>,
-    default_axes: Vec<(Code, (VBKey, VBKey))>,
-}
-
-#[derive(Serialize, Deserialize)]
-pub struct Shortcut {
-    pub shortcut: KeyboardShortcut,
-    pub command: Command,
-}
-
-#[derive(Clone, Copy, Serialize, Deserialize, PartialEq, Eq, Hash)]
-pub enum Command {
-    OpenRom,
-    Quit,
-    FrameAdvance,
-    Reset,
-    PauseResume,
-    // if you update this, update Command::all and add a default
-}
-
-impl Command {
-    pub fn all() -> [Self; 5] {
-        [
-            Self::OpenRom,
-            Self::Quit,
-            Self::PauseResume,
-            Self::Reset,
-            Self::FrameAdvance,
-        ]
-    }
-
-    pub fn name(self) -> &'static str {
-        match self {
-            Self::OpenRom => "Open ROM",
-            Self::Quit => "Exit",
-            Self::PauseResume => "Pause/Resume",
-            Self::Reset => "Reset",
-            Self::FrameAdvance => "Frame Advance",
-        }
-    }
-}
-
-impl Display for Command {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.write_str(self.name())
-    }
-}
-
-struct Shortcuts {
-    all: Vec<(Command, KeyboardShortcut)>,
-    by_command: HashMap<Command, KeyboardShortcut>,
-}
-
-impl Default for Shortcuts {
-    fn default() -> Self {
-        let mut shortcuts = Shortcuts {
-            all: vec![],
-            by_command: HashMap::new(),
-        };
-        shortcuts.set(
-            Command::OpenRom,
-            KeyboardShortcut::new(Modifiers::COMMAND, Key::O),
-        );
-        shortcuts.set(
-            Command::Quit,
-            KeyboardShortcut::new(Modifiers::COMMAND, Key::Q),
-        );
-        shortcuts.set(
-            Command::PauseResume,
-            KeyboardShortcut::new(Modifiers::NONE, Key::F5),
-        );
-        shortcuts.set(
-            Command::Reset,
-            KeyboardShortcut::new(Modifiers::SHIFT, Key::F5),
-        );
-        shortcuts.set(
-            Command::FrameAdvance,
-            KeyboardShortcut::new(Modifiers::NONE, Key::F6),
-        );
-        shortcuts
-    }
-}
-
-impl Shortcuts {
-    fn set(&mut self, command: Command, shortcut: KeyboardShortcut) {
-        if self.by_command.insert(command, shortcut).is_some() {
-            for (cmd, sht) in &mut self.all {
-                if *cmd == command {
-                    *sht = shortcut;
-                    break;
-                }
-            }
-        } else {
-            self.all.push((command, shortcut));
-        }
-        self.all.sort_by(|l, r| order_shortcut(l.1, r.1));
-    }
-
-    fn unset(&mut self, command: Command) {
-        if self.by_command.remove(&command).is_some() {
-            self.all.retain(|(c, _)| *c != command);
-        }
-    }
-
-    fn save(&self) -> PersistedShortcuts {
-        let mut shortcuts = PersistedShortcuts { shortcuts: vec![] };
-        for command in Command::all() {
-            let shortcut = self.by_command.get(&command).copied();
-            shortcuts.shortcuts.push((command, shortcut));
-        }
-        shortcuts
-    }
-}
-
-fn order_shortcut(left: KeyboardShortcut, right: KeyboardShortcut) -> Ordering {
-    left.logical_key.cmp(&right.logical_key).then_with(|| {
-        specificity(left.modifiers)
-            .cmp(&specificity(right.modifiers))
-            .reverse()
-    })
-}
-
-fn specificity(modifiers: egui::Modifiers) -> usize {
-    let mut mods = 0;
-    if modifiers.alt {
-        mods += 1;
-    }
-    if modifiers.command || modifiers.ctrl {
-        mods += 1;
-    }
-    if modifiers.shift {
-        mods += 1;
-    }
-    mods
-}
-
-#[derive(Serialize, Deserialize)]
-struct PersistedShortcuts {
-    shortcuts: Vec<(Command, Option<KeyboardShortcut>)>,
-}
-
-#[derive(Clone)]
-pub struct ShortcutProvider {
-    persistence: Persistence,
-    shortcuts: Arc<Mutex<Shortcuts>>,
-}
-
-impl ShortcutProvider {
-    pub fn new(persistence: Persistence) -> Self {
-        let mut shortcuts = Shortcuts::default();
-        if let Ok(saved) = persistence.load_config::<PersistedShortcuts>("shortcuts") {
-            for (command, shortcut) in saved.shortcuts {
-                if let Some(shortcut) = shortcut {
-                    shortcuts.set(command, shortcut);
-                } else {
-                    shortcuts.unset(command);
-                }
-            }
-        }
-        Self {
-            persistence,
-            shortcuts: Arc::new(Mutex::new(shortcuts)),
-        }
-    }
-
-    pub fn shortcut_for(&self, command: Command) -> Option<KeyboardShortcut> {
-        let lock = self.shortcuts.lock().unwrap();
-        lock.by_command.get(&command).copied()
-    }
-
-    pub fn consume_all(&self, input: &mut egui::InputState) -> HashSet<Command> {
-        let lock = self.shortcuts.lock().unwrap();
-        lock.all
-            .iter()
-            .filter_map(|(command, shortcut)| input.consume_shortcut(shortcut).then_some(*command))
-            .collect()
-    }
-
-    pub fn set(&self, command: Command, shortcut: KeyboardShortcut) {
-        let updated = {
-            let mut lock = self.shortcuts.lock().unwrap();
-            lock.set(command, shortcut);
-            lock.save()
-        };
-        let _ = self.persistence.save_config("shortcuts", &updated);
-    }
-
-    pub fn unset(&self, command: Command) {
-        let updated = {
-            let mut lock = self.shortcuts.lock().unwrap();
-            lock.unset(command);
-            lock.save()
-        };
-        let _ = self.persistence.save_config("shortcuts", &updated);
-    }
-
-    pub fn reset(&self) {
-        let updated = {
-            let mut lock = self.shortcuts.lock().unwrap();
-            *lock = Shortcuts::default();
-            lock.save()
-        };
-        let _ = self.persistence.save_config("shortcuts", &updated);
-    }
 }

src/main.rs

@@ -1,80 +1,23 @@
-// hide console in release mode
-#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+use std::{path::PathBuf, process};
 
-use std::{path::PathBuf, process, time::SystemTime};
-
-use anyhow::{Result, bail};
+use anyhow::Result;
 use app::Application;
 use clap::Parser;
 use emulator::EmulatorBuilder;
 use thread_priority::{ThreadBuilder, ThreadPriority};
-use tracing::error;
-use tracing_subscriber::{EnvFilter, Layer, layer::SubscriberExt, util::SubscriberInitExt};
 use winit::event_loop::{ControlFlow, EventLoop};
 
 mod app;
 mod audio;
 mod controller;
 mod emulator;
-mod gdbserver;
 mod graphics;
-mod images;
 mod input;
-mod memory;
-mod persistence;
 mod window;
 
 #[derive(Parser)]
 struct Args {
-    /// The path to a virtual boy ROM to run.
     rom: Option<PathBuf>,
-    /// Start a GDB/LLDB debug server on this port.
-    #[arg(short, long)]
-    debug_port: Option<u16>,
-}
-
-fn init_logger() {
-    let directives = std::env::var("RUST_LOG").unwrap_or("error,lemur=info".into());
-    let filter = EnvFilter::builder().parse_lossy(directives);
-    let layer = tracing_subscriber::fmt::layer().with_filter(filter);
-    tracing_subscriber::registry().with(layer).init();
-}
-
-fn set_panic_handler() {
-    std::panic::set_hook(Box::new(|info| {
-        let mut message = String::new();
-        if let Some(msg) = info.payload().downcast_ref::<&str>() {
-            message += &format!("{}\n", msg);
-        } else if let Some(msg) = info.payload().downcast_ref::<String>() {
-            message += &format!("{}\n", msg);
-        }
-        if let Some(location) = info.location() {
-            message += &format!(
-                "    in file '{}' at line {}\n",
-                location.file(),
-                location.line()
-            );
-        }
-        let backtrace = std::backtrace::Backtrace::force_capture();
-        message += &format!("stack trace:\n{:#}\n", backtrace);
-
-        eprint!("{}", message);
-
-        let Some(project_dirs) = directories::ProjectDirs::from("com", "virtual-boy", "Lemur")
-        else {
-            return;
-        };
-        let data_dir = project_dirs.data_dir();
-        if std::fs::create_dir_all(data_dir).is_err() {
-            return;
-        }
-        let timestamp = SystemTime::now()
-            .duration_since(SystemTime::UNIX_EPOCH)
-            .unwrap()
-            .as_millis();
-        let logfile_name = format!("crash-{}.txt", timestamp);
-        let _ = std::fs::write(data_dir.join(logfile_name), message);
-    }));
 }
 
 #[cfg(windows)]
@@ -87,24 +30,14 @@ fn set_process_priority_to_high() -> Result<()> {
 }
 
 fn main() -> Result<()> {
-    init_logger();
-
-    set_panic_handler();
-
     #[cfg(windows)]
     set_process_priority_to_high()?;
 
     let args = Args::parse();
 
     let (mut builder, client) = EmulatorBuilder::new();
-    if let Some(path) = &args.rom {
-        builder = builder.with_rom(path);
-    }
-    if args.debug_port.is_some() {
-        if args.rom.is_none() {
-            bail!("to start debugging, please select a game.");
-        }
-        builder = builder.start_paused(true);
+    if let Some(path) = args.rom {
+        builder = builder.with_rom(&path);
     }
 
     ThreadBuilder::default()
@@ -113,8 +46,8 @@ fn main() -> Result<()> {
         .spawn_careless(move || {
             let mut emulator = match builder.build() {
                 Ok(e) => e,
-                Err(error) => {
-                    error!(%error, "Error initializing emulator");
+                Err(err) => {
+                    eprintln!("Error initializing emulator: {err}");
                     process::exit(1);
                 }
             };
@@ -124,6 +57,6 @@ fn main() -> Result<()> {
     let event_loop = EventLoop::with_user_event().build().unwrap();
     event_loop.set_control_flow(ControlFlow::Poll);
     let proxy = event_loop.create_proxy();
-    event_loop.run_app(&mut Application::new(client, proxy, args.debug_port))?;
+    event_loop.run_app(&mut Application::new(client, proxy))?;
     Ok(())
 }

src/memory.rs

@@ -1,276 +0,0 @@
-use std::{
-    collections::HashMap,
-    fmt::Debug,
-    iter::FusedIterator,
-    sync::{Arc, Mutex, RwLock, RwLockReadGuard, TryLockError, Weak, atomic::AtomicU64},
-};
-
-use bytemuck::BoxBytes;
-use itertools::Itertools;
-use tracing::warn;
-
-use crate::emulator::{EmulatorClient, EmulatorCommand, SimId};
-
-pub struct MemoryClient {
-    client: EmulatorClient,
-    regions: Mutex<HashMap<MemoryRange, Weak<MemoryRegion>>>,
-}
-
-impl MemoryClient {
-    pub fn new(client: EmulatorClient) -> Self {
-        Self {
-            client,
-            regions: Mutex::new(HashMap::new()),
-        }
-    }
-
-    pub fn watch(&self, sim: SimId, start: u32, length: usize) -> MemoryView {
-        let range = MemoryRange { sim, start, length };
-        let mut regions = self.regions.lock().unwrap_or_else(|e| e.into_inner());
-        let region = regions
-            .get(&range)
-            .and_then(|r| r.upgrade())
-            .unwrap_or_else(|| {
-                let region = Arc::new(MemoryRegion::new(start, length));
-                regions.insert(range, Arc::downgrade(&region));
-                self.client
-                    .send_command(EmulatorCommand::WatchMemory(range, Arc::downgrade(&region)));
-                region
-            });
-        MemoryView { region }
-    }
-
-    pub fn write<T: MemoryValue>(&self, sim: SimId, address: u32, data: &T) {
-        let mut buffer = vec![];
-        data.to_bytes(&mut buffer);
-        let (tx, _) = oneshot::channel();
-        self.client
-            .send_command(EmulatorCommand::WriteMemory(sim, address, buffer, tx));
-    }
-}
-
-fn aligned_memory(start: u32, length: usize) -> BoxBytes {
-    if start % 4 == 0 && length % 4 == 0 {
-        let memory = vec![0u32; length / 4].into_boxed_slice();
-        return bytemuck::box_bytes_of(memory);
-    }
-    if start % 2 == 0 && length % 2 == 0 {
-        let memory = vec![0u16; length / 2].into_boxed_slice();
-        return bytemuck::box_bytes_of(memory);
-    }
-    let memory = vec![0u8; length].into_boxed_slice();
-    bytemuck::box_bytes_of(memory)
-}
-
-pub struct MemoryView {
-    region: Arc<MemoryRegion>,
-}
-
-impl MemoryView {
-    pub fn borrow(&self) -> MemoryRef<'_> {
-        self.region.borrow()
-    }
-}
-
-pub struct MemoryRef<'a> {
-    inner: RwLockReadGuard<'a, BoxBytes>,
-}
-
-pub trait MemoryValue {
-    fn from_bytes(bytes: &[u8]) -> Self;
-    fn to_bytes(&self, buffer: &mut Vec<u8>);
-}
-
-macro_rules! primitive_memory_value_impl {
-    ($T:ty, $L: expr) => {
-        impl MemoryValue for $T {
-            #[inline]
-            fn from_bytes(bytes: &[u8]) -> Self {
-                let bytes: [u8; std::mem::size_of::<$T>()] = std::array::from_fn(|i| bytes[i]);
-                <$T>::from_le_bytes(bytes)
-            }
-            #[inline]
-            fn to_bytes(&self, buffer: &mut Vec<u8>) {
-                buffer.extend_from_slice(&self.to_le_bytes())
-            }
-        }
-    };
-}
-
-primitive_memory_value_impl!(u8, 1);
-primitive_memory_value_impl!(i8, 1);
-primitive_memory_value_impl!(u16, 2);
-primitive_memory_value_impl!(i16, 2);
-primitive_memory_value_impl!(u32, 4);
-primitive_memory_value_impl!(i32, 4);
-
-impl<const N: usize, T: MemoryValue> MemoryValue for [T; N] {
-    #[inline]
-    fn from_bytes(bytes: &[u8]) -> Self {
-        std::array::from_fn(|i| {
-            T::from_bytes(&bytes[i * std::mem::size_of::<T>()..(i + 1) * std::mem::size_of::<T>()])
-        })
-    }
-    #[inline]
-    fn to_bytes(&self, buffer: &mut Vec<u8>) {
-        for item in self {
-            item.to_bytes(buffer);
-        }
-    }
-}
-
-pub struct MemoryIter<'a, T> {
-    bytes: &'a [u8],
-    _phantom: std::marker::PhantomData<T>,
-}
-
-impl<'a, T> MemoryIter<'a, T> {
-    fn new(bytes: &'a [u8]) -> Self {
-        Self {
-            bytes,
-            _phantom: std::marker::PhantomData,
-        }
-    }
-}
-
-impl<T: MemoryValue> Iterator for MemoryIter<'_, T> {
-    type Item = T;
-
-    #[inline]
-    fn next(&mut self) -> Option<Self::Item> {
-        let (bytes, rest) = self.bytes.split_at_checked(std::mem::size_of::<T>())?;
-        self.bytes = rest;
-        Some(T::from_bytes(bytes))
-    }
-
-    #[inline]
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        let size = self.bytes.len() / std::mem::size_of::<T>();
-        (size, Some(size))
-    }
-}
-
-impl<T: MemoryValue> DoubleEndedIterator for MemoryIter<'_, T> {
-    fn next_back(&mut self) -> Option<Self::Item> {
-        let mid = self.bytes.len().checked_sub(std::mem::size_of::<T>())?;
-        // SAFETY: the checked_sub above is effectively a bounds check
-        let (rest, bytes) = unsafe { self.bytes.split_at_unchecked(mid) };
-        self.bytes = rest;
-        Some(T::from_bytes(bytes))
-    }
-}
-
-impl<T: MemoryValue> FusedIterator for MemoryIter<'_, T> {}
-
-impl MemoryRef<'_> {
-    pub fn read<T: MemoryValue>(&self, index: usize) -> T {
-        let from = index * size_of::<T>();
-        let to = from + size_of::<T>();
-        T::from_bytes(&self.inner[from..to])
-    }
-
-    pub fn range<T: MemoryValue>(&self, start: usize, count: usize) -> MemoryIter<T> {
-        let from = start * size_of::<T>();
-        let to = from + (count * size_of::<T>());
-        MemoryIter::new(&self.inner[from..to])
-    }
-}
-
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
-pub struct MemoryRange {
-    pub sim: SimId,
-    pub start: u32,
-    pub length: usize,
-}
-
-const BUFFERS: usize = 4;
-pub struct MemoryRegion {
-    gens: [AtomicU64; BUFFERS],
-    bufs: [RwLock<BoxBytes>; BUFFERS],
-}
-impl Debug for MemoryRegion {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("MemoryRegion")
-            .field("gens", &self.gens)
-            .finish_non_exhaustive()
-    }
-}
-// SAFETY: BoxBytes is meant to be Send+Sync, will be in a future version
-unsafe impl Send for MemoryRegion {}
-// SAFETY: BoxBytes is meant to be Send+Sync, will be in a future version
-unsafe impl Sync for MemoryRegion {}
-
-impl MemoryRegion {
-    fn new(start: u32, length: usize) -> Self {
-        Self {
-            gens: std::array::from_fn(|i| AtomicU64::new(i as u64)),
-            bufs: std::array::from_fn(|_| RwLock::new(aligned_memory(start, length))),
-        }
-    }
-
-    pub fn borrow(&self) -> MemoryRef<'_> {
-        /*
-         * When reading memory, a thread will grab the newest buffer (with the highest gen)
-         * It will only fail to grab the lock if the writer already has it,
-         * but the writer prioritizes older buffers (with lower gens).
-         * So this method will only block if the writer produces three full buffers
-         * in the time it takes the reader to do four atomic reads and grab a lock.
-         * In the unlikely event this happens... just try again.
-         */
-        loop {
-            let newest_index = self
-                .gens
-                .iter()
-                .map(|i| i.load(std::sync::atomic::Ordering::Acquire))
-                .enumerate()
-                .max_by_key(|(_, g)| *g)
-                .map(|(i, _)| i)
-                .unwrap();
-            let inner = match self.bufs[newest_index].try_read() {
-                Ok(inner) => inner,
-                Err(TryLockError::Poisoned(e)) => e.into_inner(),
-                Err(TryLockError::WouldBlock) => {
-                    continue;
-                }
-            };
-            break MemoryRef { inner };
-        }
-    }
-
-    pub fn update(&self, data: &[u8]) {
-        let gens = self
-            .gens
-            .each_ref()
-            .map(|i| i.load(std::sync::atomic::Ordering::Acquire));
-        let next_gen = gens.iter().max().unwrap() + 1;
-        let indices = gens
-            .into_iter()
-            .enumerate()
-            .sorted_by_key(|(_, val)| *val)
-            .map(|(i, _)| i);
-        for index in indices {
-            let mut lock = match self.bufs[index].try_write() {
-                Ok(inner) => inner,
-                Err(TryLockError::Poisoned(e)) => e.into_inner(),
-                Err(TryLockError::WouldBlock) => {
-                    continue;
-                }
-            };
-            lock.copy_from_slice(data);
-            self.gens[index].store(next_gen, std::sync::atomic::Ordering::Release);
-            return;
-        }
-        /*
-         * We have four buffers, and (at time of writing) only three threads interacting with memory:
-         * - The UI thread, reading small regions of memory
-         * - The "image renderer" thread, reading large regions of memory
-         * - The emulation thread, writing memory every so often
-         * So it should be impossible for all four buffers to have a read lock at the same time,
-         *  and (because readers always read the newest buffer) at least one of the oldest three
-         *  buffers will be free the entire time we're in this method.
-         * TL;DR this should never happen.
-         * But if it does, do nothing. This isn't medical software, better to show stale data than crash.
-         */
-        warn!("all buffers were locked by a reader at the same time")
-    }
-}

src/persistence.rs

@@ -1,46 +0,0 @@
-use std::{fs, path::PathBuf};
-
-use anyhow::{Result, bail};
-use directories::ProjectDirs;
-use serde::{Deserialize, Serialize};
-
-#[derive(Clone)]
-pub struct Persistence {
-    dirs: Option<Dirs>,
-}
-
-impl Persistence {
-    pub fn new() -> Self {
-        Self { dirs: init_dirs() }
-    }
-
-    pub fn save_config<T: Serialize>(&self, file: &str, data: &T) -> Result<()> {
-        if let Some(dirs) = self.dirs.as_ref() {
-            let bytes = serde_json::to_vec_pretty(data)?;
-            let filename = dirs.config_dir.join(file).with_extension("json");
-            fs::write(&filename, bytes)?;
-        }
-        Ok(())
-    }
-
-    pub fn load_config<T: for<'a> Deserialize<'a>>(&self, file: &str) -> Result<T> {
-        let Some(dirs) = self.dirs.as_ref() else {
-            bail!("config directory not found");
-        };
-        let filename = dirs.config_dir.join(file).with_extension("json");
-        let bytes = fs::read(filename)?;
-        Ok(serde_json::from_slice(&bytes)?)
-    }
-}
-
-#[derive(Clone)]
-struct Dirs {
-    config_dir: PathBuf,
-}
-
-fn init_dirs() -> Option<Dirs> {
-    let dirs = ProjectDirs::from("com", "virtual-boy", "Lemur")?;
-    let config_dir = dirs.config_dir().to_path_buf();
-    fs::create_dir_all(&config_dir).ok()?;
-    Some(Dirs { config_dir })
-}

src/window.rs

@@ -1,43 +1,24 @@
-pub use about::AboutWindow;
 use egui::{Context, ViewportBuilder, ViewportId};
 pub use game::GameWindow;
-pub use gdb::GdbServerWindow;
 pub use input::InputWindow;
-pub use shortcuts::ShortcutsWindow;
-pub use vip::{
-    BgMapWindow, CharacterDataWindow, FrameBufferWindow, ObjectWindow, RegisterWindow, WorldWindow,
-};
 use winit::event::KeyEvent;
 
-use crate::emulator::SimId;
-
-mod about;
 mod game;
 mod game_screen;
-mod gdb;
 mod input;
-mod shortcuts;
-mod utils;
-mod vip;
 
 pub trait AppWindow {
     fn viewport_id(&self) -> ViewportId;
-    fn sim_id(&self) -> SimId {
-        SimId::Player1
-    }
     fn initial_viewport(&self) -> ViewportBuilder;
     fn show(&mut self, ctx: &Context);
-    fn on_init(&mut self, ctx: &Context, render_state: &egui_wgpu::RenderState) {
-        let _ = ctx;
+    fn on_init(&mut self, render_state: &egui_wgpu::RenderState) {
         let _ = render_state;
     }
     fn on_destroy(&mut self) {}
-    fn handle_key_event(&mut self, event: &KeyEvent) -> bool {
+    fn handle_key_event(&mut self, event: &KeyEvent) {
         let _ = event;
-        false
     }
-    fn handle_gamepad_event(&mut self, event: &gilrs::Event) -> bool {
+    fn handle_gamepad_event(&mut self, event: &gilrs::Event) {
         let _ = event;
-        false
     }
 }

src/window/about.rs

@@ -1,31 +0,0 @@
-use egui::{CentralPanel, Context, Image, ViewportBuilder, ViewportId};
-
-use super::AppWindow;
-
-pub struct AboutWindow;
-
-impl AppWindow for AboutWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of("About")
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title("About Lemur")
-            .with_inner_size((300.0, 200.0))
-    }
-
-    fn show(&mut self, ctx: &Context) {
-        CentralPanel::default().show(ctx, |ui| {
-            ui.vertical_centered(|ui| {
-                ui.label("Lemur Virtual Boy Emulator");
-                ui.label(format!("Version {}", env!("CARGO_PKG_VERSION")));
-                ui.hyperlink("https://git.virtual-boy.com/PVB/lemur");
-                let logo = Image::new(egui::include_image!("../../assets/lemur-256x256.png"))
-                    .max_width(256.0)
-                    .maintain_aspect_ratio(true);
-                ui.add(logo);
-            });
-        });
-    }
-}

src/window/game.rs

@@ -1,342 +1,81 @@
-use std::sync::mpsc;
-
 use crate::{
     app::UserEvent,
-    emulator::{EmulatorClient, EmulatorCommand, EmulatorState, SimId, SimState},
-    input::{Command, ShortcutProvider},
-    persistence::Persistence,
+    emulator::{EmulatorClient, EmulatorCommand, SimId},
 };
 use egui::{
-    Align2, Button, CentralPanel, Color32, Context, Direction, Frame, TopBottomPanel, Ui, Vec2,
-    ViewportBuilder, ViewportCommand, ViewportId, Window, menu,
+    menu, Button, CentralPanel, Color32, Context, Frame, Response, TopBottomPanel, Ui,
+    ViewportBuilder, ViewportCommand, ViewportId, WidgetText,
 };
-use egui_toast::{Toast, Toasts};
-use serde::{Deserialize, Serialize};
 use winit::event_loop::EventLoopProxy;
 
-use super::{
-    AppWindow,
-    game_screen::{DisplayMode, GameScreen},
-    utils::UiExt as _,
-};
-
-const COLOR_PRESETS: [[Color32; 2]; 3] = [
-    [
-        Color32::from_rgb(0xff, 0x00, 0x00),
-        Color32::from_rgb(0x00, 0xc6, 0xf0),
-    ],
-    [
-        Color32::from_rgb(0x00, 0xb4, 0x00),
-        Color32::from_rgb(0xc8, 0x00, 0xff),
-    ],
-    [
-        Color32::from_rgb(0xb4, 0x9b, 0x00),
-        Color32::from_rgb(0x00, 0x00, 0xff),
-    ],
-];
+use super::{game_screen::GameScreen, AppWindow};
 
 pub struct GameWindow {
     client: EmulatorClient,
     proxy: EventLoopProxy<UserEvent>,
-    persistence: Persistence,
-    shortcuts: ShortcutProvider,
     sim_id: SimId,
-    config: GameConfig,
     screen: Option<GameScreen>,
-    messages: Option<mpsc::Receiver<Toast>>,
-    color_picker: Option<ColorPickerState>,
 }
 
 impl GameWindow {
-    pub fn new(
-        client: EmulatorClient,
-        proxy: EventLoopProxy<UserEvent>,
-        persistence: Persistence,
-        shortcuts: ShortcutProvider,
-        sim_id: SimId,
-    ) -> Self {
-        let config = load_config(&persistence, sim_id);
+    pub fn new(client: EmulatorClient, proxy: EventLoopProxy<UserEvent>, sim_id: SimId) -> Self {
         Self {
             client,
             proxy,
-            persistence,
-            shortcuts,
             sim_id,
-            config,
             screen: None,
-            messages: None,
-            color_picker: None,
         }
     }
 
     fn show_menu(&mut self, ctx: &Context, ui: &mut Ui) {
-        let state = self.client.emulator_state();
-        let is_ready = self.client.sim_state(self.sim_id) == SimState::Ready;
-        let can_pause = is_ready && state == EmulatorState::Running;
-        let can_resume = is_ready && state == EmulatorState::Paused;
-        let can_frame_advance = is_ready && state != EmulatorState::Debugging;
-
-        for command in ui.input_mut(|input| self.shortcuts.consume_all(input)) {
-            match command {
-                Command::OpenRom => {
-                    let rom = rfd::FileDialog::new()
-                        .add_filter("Virtual Boy ROMs", &["vb", "vbrom"])
-                        .pick_file();
-                    if let Some(path) = rom {
-                        self.client
-                            .send_command(EmulatorCommand::LoadGame(self.sim_id, path));
-                    }
-                }
-                Command::Quit => {
-                    let _ = self.proxy.send_event(UserEvent::Quit(self.sim_id));
-                }
-                Command::PauseResume => {
-                    if state == EmulatorState::Paused && can_resume {
-                        self.client.send_command(EmulatorCommand::Resume);
-                    }
-                    if state == EmulatorState::Running && can_pause {
-                        self.client.send_command(EmulatorCommand::Pause);
-                    }
-                }
-                Command::Reset => {
-                    if is_ready {
-                        self.client
-                            .send_command(EmulatorCommand::Reset(self.sim_id));
-                    }
-                }
-                Command::FrameAdvance => {
-                    if can_frame_advance {
-                        self.client.send_command(EmulatorCommand::FrameAdvance);
-                    }
-                }
-            }
-        }
-
         ui.menu_button("ROM", |ui| {
-            if ui
-                .add(self.button_for(ui.ctx(), "Open ROM", Command::OpenRom))
-                .clicked()
-            {
+            if ui.button("Open ROM").clicked() {
                 let rom = rfd::FileDialog::new()
                     .add_filter("Virtual Boy ROMs", &["vb", "vbrom"])
                     .pick_file();
                 if let Some(path) = rom {
                     self.client
-                        .send_command(EmulatorCommand::LoadGame(self.sim_id, path));
+                        .send_command(EmulatorCommand::LoadGame(SimId::Player1, path));
                 }
                 ui.close_menu();
             }
-            if ui
-                .add(self.button_for(ui.ctx(), "Quit", Command::Quit))
-                .clicked()
-            {
-                let _ = self.proxy.send_event(UserEvent::Quit(self.sim_id));
+            if ui.button("Quit").clicked() {
+                ctx.send_viewport_cmd(ViewportCommand::Close);
             }
         });
         ui.menu_button("Emulation", |ui| {
-            if state == EmulatorState::Running {
-                if ui
-                    .add_enabled(
-                        can_pause,
-                        self.button_for(ui.ctx(), "Pause", Command::PauseResume),
-                    )
-                    .clicked()
-                {
+            let has_game = self.client.has_game(self.sim_id);
+            if self.client.is_running(self.sim_id) {
+                if ui.add_enabled(has_game, Button::new("Pause")).clicked() {
                     self.client.send_command(EmulatorCommand::Pause);
                     ui.close_menu();
                 }
-            } else if ui
-                .add_enabled(
-                    can_resume,
-                    self.button_for(ui.ctx(), "Resume", Command::PauseResume),
-                )
-                .clicked()
-            {
+            } else if ui.add_enabled(has_game, Button::new("Resume")).clicked() {
                 self.client.send_command(EmulatorCommand::Resume);
                 ui.close_menu();
             }
-            if ui
-                .add_enabled(is_ready, self.button_for(ui.ctx(), "Reset", Command::Reset))
-                .clicked()
-            {
+            if ui.add_enabled(has_game, Button::new("Reset")).clicked() {
                 self.client
                     .send_command(EmulatorCommand::Reset(self.sim_id));
                 ui.close_menu();
             }
-            ui.separator();
-            if ui
-                .add_enabled(
-                    can_frame_advance,
-                    self.button_for(ui.ctx(), "Frame Advance", Command::FrameAdvance),
-                )
-                .clicked()
-            {
-                self.client.send_command(EmulatorCommand::FrameAdvance);
-                ui.close_menu();
-            }
         });
-        ui.menu_button("Options", |ui| self.show_options_menu(ctx, ui));
-        ui.menu_button("Multiplayer", |ui| {
-            let has_player_2 = self.client.sim_state(SimId::Player2) != SimState::Uninitialized;
-            if self.sim_id == SimId::Player1
-                && !has_player_2
-                && ui.button("Open Player 2").clicked()
-            {
-                self.client
-                    .send_command(EmulatorCommand::StartSecondSim(None));
-                self.proxy.send_event(UserEvent::OpenPlayer2).unwrap();
-                ui.close_menu();
-            }
-            if has_player_2 {
-                let linked = self.client.are_sims_linked();
-                if linked && ui.button("Unlink").clicked() {
-                    self.client.send_command(EmulatorCommand::Unlink);
-                    ui.close_menu();
-                }
-                if !linked && ui.button("Link").clicked() {
-                    self.client.send_command(EmulatorCommand::Link);
-                    ui.close_menu();
-                }
-            }
-        });
-        ui.menu_button("Tools", |ui| {
-            if ui.button("GDB Server").clicked() {
-                self.proxy
-                    .send_event(UserEvent::OpenDebugger(self.sim_id))
-                    .unwrap();
-                ui.close_menu();
-            }
-            ui.separator();
-            if ui.button("Character Data").clicked() {
-                self.proxy
-                    .send_event(UserEvent::OpenCharacterData(self.sim_id))
-                    .unwrap();
-                ui.close_menu();
-            }
-            if ui.button("Background Maps").clicked() {
-                self.proxy
-                    .send_event(UserEvent::OpenBgMap(self.sim_id))
-                    .unwrap();
-                ui.close_menu();
-            }
-            if ui.button("Objects").clicked() {
-                self.proxy
-                    .send_event(UserEvent::OpenObjects(self.sim_id))
-                    .unwrap();
-                ui.close_menu();
-            }
-            if ui.button("Worlds").clicked() {
-                self.proxy
-                    .send_event(UserEvent::OpenWorlds(self.sim_id))
-                    .unwrap();
-                ui.close_menu();
-            }
-            if ui.button("Frame Buffers").clicked() {
-                self.proxy
-                    .send_event(UserEvent::OpenFrameBuffers(self.sim_id))
-                    .unwrap();
-                ui.close_menu();
-            }
-            if ui.button("Registers").clicked() {
-                self.proxy
-                    .send_event(UserEvent::OpenRegisters(self.sim_id))
-                    .unwrap();
-                ui.close_menu();
-            }
-        });
-        ui.menu_button("Help", |ui| {
-            if ui.button("About").clicked() {
-                self.proxy.send_event(UserEvent::OpenAbout).unwrap();
-                ui.close_menu();
-            }
-        });
-    }
-
-    fn show_options_menu(&mut self, ctx: &Context, ui: &mut Ui) {
         ui.menu_button("Video", |ui| {
-            ui.menu_button("Screen Size", |ui| {
-                let current_dims = self.config.dimensions;
+            let current_dims = ctx.input(|i| i.viewport().inner_rect.unwrap());
+            let current_dims = current_dims.max - current_dims.min;
 
-                for scale in 1..=4 {
-                    let label = format!("x{scale}");
-                    let scale = scale as f32;
-                    let dims = {
-                        let Vec2 { x, y } = self.config.display_mode.proportions();
-                        Vec2::new(x * scale, y * scale + 22.0)
-                    };
-                    if ui
-                        .selectable_button((current_dims - dims).length() < 1.0, label)
-                        .clicked()
-                    {
-                        ctx.send_viewport_cmd(ViewportCommand::InnerSize(dims));
-                        ui.close_menu();
-                    }
+            for scale in 1..=4 {
+                let label = format!("x{scale}");
+                let scale = scale as f32;
+                let dims = (384.0 * scale, 224.0 * scale + 22.0).into();
+                if ui
+                    .selectable_button((current_dims - dims).length() < 1.0, label)
+                    .clicked()
+                {
+                    ctx.send_viewport_cmd(ViewportCommand::InnerSize(dims));
+                    ui.close_menu();
                 }
-            });
-
-            ui.menu_button("Display Mode", |ui| {
-                let old_proportions = self.config.display_mode.proportions();
-                let mut changed = false;
-                let mut display_mode = self.config.display_mode;
-                changed |= ui
-                    .selectable_option(&mut display_mode, DisplayMode::Anaglyph, "Anaglyph")
-                    .clicked();
-                changed |= ui
-                    .selectable_option(&mut display_mode, DisplayMode::LeftEye, "Left Eye")
-                    .clicked();
-                changed |= ui
-                    .selectable_option(&mut display_mode, DisplayMode::RightEye, "Right Eye")
-                    .clicked();
-                changed |= ui
-                    .selectable_option(&mut display_mode, DisplayMode::SideBySide, "Side by Side")
-                    .clicked();
-
-                if !changed {
-                    return;
-                }
-
-                let current_dims = self.config.dimensions;
-                let new_proportions = display_mode.proportions();
-                let scale = new_proportions / old_proportions;
-                if scale != Vec2::new(1.0, 1.0) {
-                    ctx.send_viewport_cmd(ViewportCommand::InnerSize(current_dims * scale));
-                }
-
-                self.update_config(|c| {
-                    c.display_mode = display_mode;
-                    c.dimensions = current_dims * scale;
-                });
-                ui.close_menu();
-            });
-            ui.menu_button("Colors", |ui| {
-                for preset in COLOR_PRESETS {
-                    if ui.color_pair_button(preset[0], preset[1]).clicked() {
-                        self.update_config(|c| c.colors = preset);
-                        ui.close_menu();
-                    }
-                }
-                ui.with_layout(ui.layout().with_cross_align(egui::Align::Center), |ui| {
-                    if ui.button("Custom").clicked() {
-                        let color_str = |color: Color32| {
-                            format!("{:02x}{:02x}{:02x}", color.r(), color.g(), color.b())
-                        };
-                        let is_running = self.client.emulator_state() == EmulatorState::Running;
-                        if is_running {
-                            self.client.send_command(EmulatorCommand::Pause);
-                        }
-                        let color_codes = [
-                            color_str(self.config.colors[0]),
-                            color_str(self.config.colors[1]),
-                        ];
-                        self.color_picker = Some(ColorPickerState {
-                            color_codes,
-                            just_opened: true,
-                            unpause_on_close: is_running,
-                        });
-                        ui.close_menu();
-                    }
-                });
-            });
+            }
         });
         ui.menu_button("Audio", |ui| {
             let p1_enabled = self.client.is_audio_enabled(SimId::Player1);
@@ -358,76 +97,28 @@ impl GameWindow {
                 ui.close_menu();
             }
         });
-        if ui.button("Key Shortcuts").clicked() {
-            self.proxy.send_event(UserEvent::OpenShortcuts).unwrap();
-            ui.close_menu();
-        }
-    }
-
-    fn show_color_picker(&mut self, ui: &mut Ui) {
-        let mut colors = self.config.colors;
-        let Some(state) = self.color_picker.as_mut() else {
-            return;
-        };
-        let (open, updated) = ui
-            .horizontal(|ui| {
-                let left_color = ui.color_picker(&mut colors[0], &mut state.color_codes[0]);
-                if state.just_opened {
-                    left_color.request_focus();
-                    state.just_opened = false;
-                }
-                let right_color = ui.color_picker(&mut colors[1], &mut state.color_codes[1]);
-                let open = left_color.has_focus() || right_color.has_focus();
-                let updated = left_color.changed() || right_color.changed();
-                (open, updated)
-            })
-            .inner;
-        if !open {
-            if state.unpause_on_close {
-                self.client.send_command(EmulatorCommand::Resume);
+        ui.menu_button("Multiplayer", |ui| {
+            if self.sim_id == SimId::Player1
+                && !self.client.has_player_2()
+                && ui.button("Open Player 2").clicked()
+            {
+                self.client
+                    .send_command(EmulatorCommand::StartSecondSim(None));
+                self.proxy.send_event(UserEvent::OpenPlayer2).unwrap();
+                ui.close_menu();
             }
-            self.color_picker = None;
-        }
-        if updated {
-            self.update_config(|c| c.colors = colors);
-        }
-    }
-
-    fn update_config(&mut self, update: impl FnOnce(&mut GameConfig)) {
-        let mut new_config = self.config.clone();
-        update(&mut new_config);
-        if self.config != new_config {
-            let _ = self
-                .persistence
-                .save_config(config_filename(self.sim_id), &new_config);
-        }
-        self.config = new_config;
-    }
-
-    fn button_for(&self, ctx: &Context, text: &str, command: Command) -> Button {
-        let button = Button::new(text);
-        match self.shortcuts.shortcut_for(command) {
-            Some(shortcut) => button.shortcut_text(ctx.format_shortcut(&shortcut)),
-            None => button,
-        }
-    }
-}
-
-fn config_filename(sim_id: SimId) -> &'static str {
-    match sim_id {
-        SimId::Player1 => "config_p1",
-        SimId::Player2 => "config_p2",
-    }
-}
-
-fn load_config(persistence: &Persistence, sim_id: SimId) -> GameConfig {
-    if let Ok(config) = persistence.load_config(config_filename(sim_id)) {
-        return config;
-    }
-    GameConfig {
-        display_mode: DisplayMode::Anaglyph,
-        colors: COLOR_PRESETS[0],
-        dimensions: DisplayMode::Anaglyph.proportions() + Vec2::new(0.0, 22.0),
+            if self.client.has_player_2() {
+                let linked = self.client.are_sims_linked();
+                if linked && ui.button("Unlink").clicked() {
+                    self.client.send_command(EmulatorCommand::Unlink);
+                    ui.close_menu();
+                }
+                if !linked && ui.button("Link").clicked() {
+                    self.client.send_command(EmulatorCommand::Link);
+                    ui.close_menu();
+                }
+            }
+        });
     }
 }
 
@@ -439,31 +130,13 @@ impl AppWindow for GameWindow {
         }
     }
 
-    fn sim_id(&self) -> SimId {
-        self.sim_id
-    }
-
     fn initial_viewport(&self) -> ViewportBuilder {
         ViewportBuilder::default()
-            .with_title("Lemur")
-            .with_inner_size(self.config.dimensions)
+            .with_title("Shrooms VB")
+            .with_inner_size((384.0, 246.0))
     }
 
     fn show(&mut self, ctx: &Context) {
-        let dimensions = {
-            let bounds = ctx.available_rect();
-            bounds.max - bounds.min
-        };
-        self.update_config(|c| c.dimensions = dimensions);
-
-        let mut toasts = Toasts::new()
-            .anchor(Align2::LEFT_BOTTOM, (10.0, 10.0))
-            .direction(Direction::BottomUp);
-        if let Some(messages) = self.messages.as_mut() {
-            while let Ok(toast) = messages.try_recv() {
-                toasts.add(toast);
-            }
-        }
         TopBottomPanel::top("menubar")
             .exact_height(22.0)
             .show(ctx, |ui| {
@@ -471,54 +144,38 @@ impl AppWindow for GameWindow {
                     self.show_menu(ctx, ui);
                 });
             });
-        if self.color_picker.is_some() {
-            Window::new("Color Picker")
-                .title_bar(false)
-                .resizable(false)
-                .anchor(Align2::CENTER_CENTER, Vec2::ZERO)
-                .show(ctx, |ui| {
-                    self.show_color_picker(ui);
-                });
-        }
         let frame = Frame::central_panel(&ctx.style()).fill(Color32::BLACK);
         CentralPanel::default().frame(frame).show(ctx, |ui| {
-            if let Some(screen) = self.screen.as_mut() {
-                screen.update(self.config.display_mode, self.config.colors);
+            if let Some(screen) = self.screen.as_ref() {
                 ui.add(screen);
             }
         });
-        toasts.show(ctx);
     }
 
-    fn on_init(&mut self, _ctx: &Context, render_state: &egui_wgpu::RenderState) {
+    fn on_init(&mut self, render_state: &egui_wgpu::RenderState) {
         let (screen, sink) = GameScreen::init(render_state);
-        let (message_sink, message_source) = mpsc::channel();
-        self.client.send_command(EmulatorCommand::ConnectToSim(
-            self.sim_id,
-            sink,
-            message_sink,
-        ));
-        self.screen = Some(screen);
-        self.messages = Some(message_source);
+        self.client
+            .send_command(EmulatorCommand::SetRenderer(self.sim_id, sink));
+        self.screen = Some(screen)
     }
 
     fn on_destroy(&mut self) {
         if self.sim_id == SimId::Player2 {
             self.client.send_command(EmulatorCommand::StopSecondSim);
         }
-        let _ = self.proxy.send_event(UserEvent::Quit(self.sim_id));
     }
 }
 
-struct ColorPickerState {
-    color_codes: [String; 2],
-    just_opened: bool,
-    unpause_on_close: bool,
+trait UiExt {
+    fn selectable_button(&mut self, selected: bool, text: impl Into<WidgetText>) -> Response;
 }
 
-#[derive(Serialize, Deserialize, Clone, PartialEq, Eq)]
-struct GameConfig {
-    display_mode: DisplayMode,
-    colors: [Color32; 2],
-    dimensions: Vec2,
+impl UiExt for Ui {
+    fn selectable_button(&mut self, selected: bool, text: impl Into<WidgetText>) -> Response {
+        self.style_mut().visuals.widgets.inactive.bg_fill = Color32::TRANSPARENT;
+        self.style_mut().visuals.widgets.hovered.bg_fill = Color32::TRANSPARENT;
+        self.style_mut().visuals.widgets.active.bg_fill = Color32::TRANSPARENT;
+        let mut selected = selected;
+        self.checkbox(&mut selected, text)
+    }
 }

src/window/game_screen.rs

@@ -1,16 +1,12 @@
-use std::{collections::HashMap, sync::Arc};
+use std::sync::Arc;
 
-use egui::{Color32, Rgba, Vec2, Widget};
-use serde::{Deserialize, Serialize};
-use wgpu::{BindGroup, BindGroupLayout, Buffer, RenderPipeline, util::DeviceExt as _};
+use egui::Widget;
+use wgpu::{util::DeviceExt as _, BindGroup, BindGroupLayout, RenderPipeline};
 
 use crate::graphics::TextureSink;
 
 pub struct GameScreen {
     bind_group: Arc<BindGroup>,
-    color_buffer: Arc<Buffer>,
-    display_mode: DisplayMode,
-    colors: Colors,
 }
 
 impl GameScreen {
@@ -49,69 +45,57 @@ impl GameScreen {
             ],
         });
 
-        let shader = device.create_shader_module(wgpu::include_wgsl!("../game.wgsl"));
+        let shader = device.create_shader_module(wgpu::include_wgsl!("../anaglyph.wgsl"));
         let render_pipeline_layout =
             device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
                 label: Some("render pipeline layout"),
                 bind_group_layouts: &[&bind_group_layout],
                 push_constant_ranges: &[],
             });
-
-        let create_render_pipeline = |entry_point: &str| {
-            device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
-                label: Some("render pipeline"),
-                layout: Some(&render_pipeline_layout),
-                vertex: wgpu::VertexState {
-                    module: &shader,
-                    entry_point: Some("vs_main"),
-                    buffers: &[],
-                    compilation_options: wgpu::PipelineCompilationOptions::default(),
-                },
-                fragment: Some(wgpu::FragmentState {
-                    module: &shader,
-                    entry_point: Some(entry_point),
-                    targets: &[Some(wgpu::ColorTargetState {
-                        format: wgpu::TextureFormat::Bgra8Unorm,
-                        blend: Some(wgpu::BlendState::REPLACE),
-                        write_mask: wgpu::ColorWrites::ALL,
-                    })],
-                    compilation_options: wgpu::PipelineCompilationOptions::default(),
-                }),
-                primitive: wgpu::PrimitiveState {
-                    topology: wgpu::PrimitiveTopology::TriangleList,
-                    strip_index_format: None,
-                    front_face: wgpu::FrontFace::Ccw,
-                    cull_mode: Some(wgpu::Face::Back),
-                    polygon_mode: wgpu::PolygonMode::Fill,
-                    unclipped_depth: false,
-                    conservative: false,
-                },
-                depth_stencil: None,
-                multisample: wgpu::MultisampleState {
-                    count: 1,
-                    mask: !0,
-                    alpha_to_coverage_enabled: false,
-                },
-                multiview: None,
-                cache: None,
-            })
-        };
-
-        let mut render_pipelines = HashMap::new();
-        render_pipelines.insert(DisplayMode::Anaglyph, create_render_pipeline("fs_anaglyph"));
-        render_pipelines.insert(DisplayMode::LeftEye, create_render_pipeline("fs_lefteye"));
-        render_pipelines.insert(DisplayMode::RightEye, create_render_pipeline("fs_righteye"));
-        render_pipelines.insert(
-            DisplayMode::SideBySide,
-            create_render_pipeline("fs_sidebyside"),
-        );
+        let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
+            label: Some("render pipeline"),
+            layout: Some(&render_pipeline_layout),
+            vertex: wgpu::VertexState {
+                module: &shader,
+                entry_point: "vs_main",
+                buffers: &[],
+                compilation_options: wgpu::PipelineCompilationOptions::default(),
+            },
+            fragment: Some(wgpu::FragmentState {
+                module: &shader,
+                entry_point: "fs_main",
+                targets: &[Some(wgpu::ColorTargetState {
+                    format: wgpu::TextureFormat::Bgra8Unorm,
+                    blend: Some(wgpu::BlendState::REPLACE),
+                    write_mask: wgpu::ColorWrites::ALL,
+                })],
+                compilation_options: wgpu::PipelineCompilationOptions::default(),
+            }),
+            primitive: wgpu::PrimitiveState {
+                topology: wgpu::PrimitiveTopology::TriangleList,
+                strip_index_format: None,
+                front_face: wgpu::FrontFace::Ccw,
+                cull_mode: Some(wgpu::Face::Back),
+                polygon_mode: wgpu::PolygonMode::Fill,
+                unclipped_depth: false,
+                conservative: false,
+            },
+            depth_stencil: None,
+            multisample: wgpu::MultisampleState {
+                count: 1,
+                mask: !0,
+                alpha_to_coverage_enabled: false,
+            },
+            multiview: None,
+            cache: None,
+        });
 
         render_state
             .renderer
             .write()
             .callback_resources
             .insert(SharedGameScreenResources {
-                render_pipelines,
+                pipeline: render_pipeline,
                 bind_group_layout,
             });
     }
@@ -124,12 +108,12 @@ impl GameScreen {
 
         let (sink, texture_view) = TextureSink::new(device, queue.clone());
         let sampler = device.create_sampler(&wgpu::SamplerDescriptor::default());
-        let colors = Colors::new(
-            Color32::from_rgb(0xff, 0x00, 0x00),
-            Color32::from_rgb(0x00, 0xc6, 0xf0),
-        );
+        let colors = Colors {
+            left: [1.0, 0.0, 0.0, 1.0],
+            right: [0.0, 0.7734375, 0.9375, 1.0],
+        };
 
-        let color_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+        let color_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
             label: Some("colors"),
             contents: bytemuck::bytes_of(&colors),
             usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
@@ -152,7 +136,7 @@ impl GameScreen {
                 },
                 wgpu::BindGroupEntry {
                     binding: 2,
-                    resource: color_buffer.as_entire_binding(),
+                    resource: color_buf.as_entire_binding(),
                 },
             ],
         });
@@ -160,30 +144,19 @@ impl GameScreen {
         (
             Self {
                 bind_group: Arc::new(bind_group),
-                color_buffer: Arc::new(color_buffer),
-                display_mode: DisplayMode::Anaglyph,
-                colors,
             },
             sink,
         )
     }
-
-    pub fn update(&mut self, display_mode: DisplayMode, colors: [Color32; 2]) {
-        self.display_mode = display_mode;
-        self.colors = Colors::new(colors[0], colors[1]);
-    }
 }
 
-impl Widget for &mut GameScreen {
+impl Widget for &GameScreen {
     fn ui(self, ui: &mut egui::Ui) -> egui::Response {
         let response = ui.allocate_rect(ui.clip_rect(), egui::Sense::hover());
         let callback = egui_wgpu::Callback::new_paint_callback(
             response.rect,
             GameScreenCallback {
                 bind_group: self.bind_group.clone(),
-                color_buffer: self.color_buffer.clone(),
-                display_mode: self.display_mode,
-                colors: self.colors,
             },
         );
         ui.painter().add(callback);
@@ -193,23 +166,9 @@ impl Widget for &mut GameScreen {
 
 struct GameScreenCallback {
     bind_group: Arc<BindGroup>,
-    color_buffer: Arc<Buffer>,
-    display_mode: DisplayMode,
-    colors: Colors,
 }
 
 impl egui_wgpu::CallbackTrait for GameScreenCallback {
-    fn prepare(
-        &self,
-        _device: &wgpu::Device,
-        queue: &wgpu::Queue,
-        _screen_descriptor: &egui_wgpu::ScreenDescriptor,
-        _egui_encoder: &mut wgpu::CommandEncoder,
-        _callback_resources: &mut egui_wgpu::CallbackResources,
-    ) -> Vec<wgpu::CommandBuffer> {
-        queue.write_buffer(&self.color_buffer, 0, bytemuck::bytes_of(&self.colors));
-        vec![]
-    }
     fn paint(
         &self,
         info: egui::PaintCallbackInfo,
@@ -222,58 +181,26 @@ impl egui_wgpu::CallbackTrait for GameScreenCallback {
         let top = viewport.top_px as f32;
         let width = viewport.width_px as f32;
         let height = viewport.height_px as f32;
-        let aspect_ratio = {
-            let proportions = self.display_mode.proportions();
-            proportions.x / proportions.y
-        };
+        let aspect_ratio = 384.0 / 224.0;
         let w = width.min(height * aspect_ratio);
         let h = height.min(width / aspect_ratio);
         let x = left + (width - w) / 2.0;
         let y = top + (height - h) / 2.0;
-        let pipeline = resources
-            .render_pipelines
-            .get(&self.display_mode)
-            .unwrap_or_else(|| panic!("Unrecognized display mode {:?}", self.display_mode));
-        render_pass.set_pipeline(pipeline);
-        render_pass.set_bind_group(0, Some(self.bind_group.as_ref()), &[]);
+        render_pass.set_pipeline(&resources.pipeline);
+        render_pass.set_bind_group(0, &self.bind_group, &[]);
         render_pass.set_viewport(x, y, w, h, 0.0, 1.0);
         render_pass.draw(0..6, 0..1);
     }
 }
 
 struct SharedGameScreenResources {
-    render_pipelines: HashMap<DisplayMode, RenderPipeline>,
+    pipeline: RenderPipeline,
     bind_group_layout: BindGroupLayout,
 }
 
 #[derive(Clone, Copy, bytemuck::Pod, bytemuck::Zeroable)]
 #[repr(C)]
 struct Colors {
-    left: Rgba,
-    right: Rgba,
-}
-impl Colors {
-    fn new(left: Color32, right: Color32) -> Self {
-        Self {
-            left: left.into(),
-            right: right.into(),
-        }
-    }
-}
-
-#[derive(Clone, Copy, PartialEq, Eq, Hash, Debug, Serialize, Deserialize)]
-pub enum DisplayMode {
-    Anaglyph,
-    LeftEye,
-    RightEye,
-    SideBySide,
-}
-
-impl DisplayMode {
-    pub fn proportions(self) -> Vec2 {
-        match self {
-            Self::SideBySide => Vec2::new(768.0, 224.0),
-            _ => Vec2::new(384.0, 224.0),
-        }
-    }
+    left: [f32; 4],
+    right: [f32; 4],
 }

src/window/gdb.rs

@@ -1,111 +0,0 @@
-use egui::{Button, CentralPanel, TextEdit, ViewportBuilder, ViewportId};
-use winit::event_loop::EventLoopProxy;
-
-use crate::{
-    app::UserEvent,
-    emulator::{EmulatorClient, SimId, SimState},
-    gdbserver::{GdbServer, GdbServerStatus},
-};
-
-use super::AppWindow;
-
-pub struct GdbServerWindow {
-    sim_id: SimId,
-    client: EmulatorClient,
-    port_str: String,
-    connected: bool,
-    quit_on_disconnect: bool,
-    server: GdbServer,
-    proxy: EventLoopProxy<UserEvent>,
-}
-
-impl GdbServerWindow {
-    pub fn new(sim_id: SimId, client: EmulatorClient, proxy: EventLoopProxy<UserEvent>) -> Self {
-        Self {
-            sim_id,
-            client: client.clone(),
-            port_str: (8080 + sim_id.to_index()).to_string(),
-            connected: false,
-            quit_on_disconnect: false,
-            server: GdbServer::new(sim_id, client),
-            proxy,
-        }
-    }
-
-    pub fn launch(&mut self, port: u16) {
-        self.server.stop();
-        self.port_str = port.to_string();
-        self.quit_on_disconnect = true;
-        self.server.start(port);
-        self.connected = true;
-    }
-}
-
-impl AppWindow for GdbServerWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of(format!("Debugger-{}", self.sim_id))
-    }
-
-    fn sim_id(&self) -> SimId {
-        self.sim_id
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title(format!("GDB Server ({})", self.sim_id))
-            .with_inner_size((300.0, 200.0))
-    }
-
-    fn show(&mut self, ctx: &egui::Context) {
-        let port_num: Option<u16> = self.port_str.parse().ok();
-        let status = self.server.status();
-        CentralPanel::default().show(ctx, |ui| {
-            ui.horizontal(|ui| {
-                if port_num.is_none() {
-                    let style = ui.style_mut();
-                    let error = style.visuals.error_fg_color;
-                    style.visuals.widgets.active.bg_stroke.color = error;
-                    style.visuals.widgets.hovered.bg_stroke.color = error;
-                }
-                ui.label("Port");
-                let port_editor = TextEdit::singleline(&mut self.port_str).desired_width(100.0);
-                ui.add_enabled(!status.running(), port_editor);
-                ui.checkbox(&mut self.quit_on_disconnect, "Quit on disconnect");
-            });
-
-            if !status.running() {
-                if self.connected && self.quit_on_disconnect {
-                    self.proxy.send_event(UserEvent::Quit(self.sim_id)).unwrap();
-                } else {
-                    self.connected = false;
-                }
-                let start_button = Button::new("Start");
-                let can_start =
-                    port_num.is_some() && self.client.sim_state(self.sim_id) == SimState::Ready;
-                if ui.add_enabled(can_start, start_button).clicked() {
-                    let port = port_num.unwrap();
-                    self.server.start(port);
-                    self.connected = true;
-                }
-            } else {
-                let stop_button = Button::new("Stop");
-                if ui.add(stop_button).clicked() {
-                    self.server.stop();
-                }
-            }
-
-            match &status {
-                GdbServerStatus::Stopped => {}
-                GdbServerStatus::Connecting => {
-                    ui.label("Connecting...");
-                }
-                GdbServerStatus::Running => {
-                    ui.label("Running");
-                }
-                GdbServerStatus::Error(message) => {
-                    ui.label(message);
-                }
-            }
-        });
-    }
-}

src/window/input.rs

@@ -53,12 +53,10 @@ impl InputWindow {
         ui.horizontal(|ui| {
             if ui.button("Use defaults").clicked() {
                 mappings.write().unwrap().use_default_mappings();
-                self.mappings.save();
                 self.now_binding = None;
             }
             if ui.button("Clear all").clicked() {
                 mappings.write().unwrap().clear_all_mappings();
-                self.mappings.save();
                 self.now_binding = None;
             }
         });
@@ -101,8 +99,6 @@ impl InputWindow {
                                 {
                                     let mut mapping = mappings.write().unwrap();
                                     mapping.clear_mappings(*key);
-                                    drop(mapping);
-                                    self.mappings.save();
                                     self.now_binding = None;
                                 }
                             });
@@ -198,63 +194,56 @@ impl AppWindow for InputWindow {
         });
     }
 
-    fn handle_key_event(&mut self, event: &winit::event::KeyEvent) -> bool {
+    fn handle_key_event(&mut self, event: &winit::event::KeyEvent) {
         if !event.state.is_pressed() {
-            return false;
+            return;
         }
         let sim_id = match self.active_tab {
             InputTab::Player1 => SimId::Player1,
             InputTab::Player2 => SimId::Player2,
             _ => {
-                return false;
+                return;
             }
         };
         let Some(vb) = self.now_binding.take() else {
-            return false;
+            return;
         };
         let mut mappings = self.mappings.for_sim(sim_id).write().unwrap();
         mappings.add_keyboard_mapping(vb, event.physical_key);
-        drop(mappings);
-        self.mappings.save();
-        true
     }
 
-    fn handle_gamepad_event(&mut self, event: &gilrs::Event) -> bool {
+    fn handle_gamepad_event(&mut self, event: &gilrs::Event) {
         let InputTab::RebindGamepad(gamepad_id) = self.active_tab else {
-            return false;
+            return;
         };
         if gamepad_id != event.id {
-            return false;
+            return;
         }
         let Some(mappings) = self.mappings.for_gamepad(gamepad_id) else {
-            return false;
+            return;
         };
         let Some(vb) = self.now_binding else {
-            return false;
+            return;
         };
         match event.event {
             EventType::ButtonPressed(_, code) => {
                 let mut mapping = mappings.write().unwrap();
                 mapping.add_button_mapping(vb, code);
                 self.now_binding.take();
-                true
             }
             EventType::AxisChanged(_, value, code) => {
                 if value < -0.75 {
                     let mut mapping = mappings.write().unwrap();
                     mapping.add_axis_neg_mapping(vb, code);
                     self.now_binding.take();
-                    true
-                } else if value > 0.75 {
+                }
+                if value > 0.75 {
                     let mut mapping = mappings.write().unwrap();
                     mapping.add_axis_pos_mapping(vb, code);
                     self.now_binding.take();
-                    true
-                } else {
-                    false
                 }
             }
-            _ => false,
+            _ => {}
         }
     }
 }

src/window/shortcuts.rs

@@ -1,103 +0,0 @@
-use egui::{
-    Button, CentralPanel, Context, Event, KeyboardShortcut, Label, Layout, Ui, ViewportBuilder,
-    ViewportId,
-};
-use egui_extras::{Column, TableBuilder};
-
-use crate::input::{Command, ShortcutProvider};
-
-use super::AppWindow;
-
-pub struct ShortcutsWindow {
-    shortcuts: ShortcutProvider,
-    now_binding: Option<Command>,
-}
-
-impl ShortcutsWindow {
-    pub fn new(shortcuts: ShortcutProvider) -> Self {
-        Self {
-            shortcuts,
-            now_binding: None,
-        }
-    }
-
-    fn show_shortcuts(&mut self, ui: &mut Ui) {
-        ui.horizontal(|ui| {
-            if ui.button("Use defaults").clicked() {
-                self.shortcuts.reset();
-            }
-        });
-        ui.separator();
-        let row_height = ui.spacing().interact_size.y;
-        let width = ui.available_width() - 20.0;
-        TableBuilder::new(ui)
-            .column(Column::exact(width * 0.3))
-            .column(Column::exact(width * 0.5))
-            .column(Column::exact(width * 0.2))
-            .cell_layout(Layout::left_to_right(egui::Align::Center))
-            .body(|mut body| {
-                for command in Command::all() {
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_sized(ui.available_size(), Label::new(command.name()));
-                        });
-                        row.col(|ui| {
-                            let button = if self.now_binding == Some(command) {
-                                Button::new("Binding...")
-                            } else if let Some(shortcut) = self.shortcuts.shortcut_for(command) {
-                                Button::new(ui.ctx().format_shortcut(&shortcut))
-                            } else {
-                                Button::new("")
-                            };
-                            if ui.add_sized(ui.available_size(), button).clicked() {
-                                self.now_binding = Some(command);
-                            }
-                        });
-                        row.col(|ui| {
-                            if ui
-                                .add_sized(ui.available_size(), Button::new("Clear"))
-                                .clicked()
-                            {
-                                self.shortcuts.unset(command);
-                                self.now_binding = None;
-                            }
-                        });
-                    });
-                }
-            });
-        if let Some(command) = self.now_binding {
-            if let Some(shortcut) = ui.input_mut(|i| {
-                i.events.iter().find_map(|event| match event {
-                    Event::Key {
-                        key,
-                        pressed: true,
-                        modifiers,
-                        ..
-                    } => Some(KeyboardShortcut::new(*modifiers, *key)),
-                    _ => None,
-                })
-            }) {
-                self.shortcuts.set(command, shortcut);
-                self.now_binding = None;
-            }
-        }
-    }
-}
-
-impl AppWindow for ShortcutsWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of("shortcuts")
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title("Keyboard Shortcuts")
-            .with_inner_size((400.0, 400.0))
-    }
-
-    fn show(&mut self, ctx: &Context) {
-        CentralPanel::default().show(ctx, |ui| {
-            self.show_shortcuts(ui);
-        });
-    }
-}

src/window/utils.rs

@@ -1,417 +0,0 @@
-use std::{
-    fmt::{Display, UpperHex},
-    ops::{Bound, RangeBounds},
-    str::FromStr,
-};
-
-use atoi::FromRadix16;
-use egui::{
-    Align, Color32, CursorIcon, Event, Frame, Key, Layout, Margin, Rect, Response, RichText,
-    Rounding, Sense, Shape, Stroke, TextEdit, Ui, UiBuilder, Vec2, Widget, WidgetText,
-    ecolor::HexColor,
-};
-use num_traits::{CheckedAdd, CheckedSub, One};
-
-pub trait UiExt {
-    fn section(&mut self, title: impl Into<String>, add_contents: impl FnOnce(&mut Ui));
-    fn selectable_button(&mut self, selected: bool, text: impl Into<WidgetText>) -> Response;
-    fn selectable_option<T: Eq>(
-        &mut self,
-        current_value: &mut T,
-        selected_value: T,
-        text: impl Into<WidgetText>,
-    ) -> Response {
-        let response = self.selectable_button(*current_value == selected_value, text);
-        if response.clicked() {
-            *current_value = selected_value;
-        }
-        response
-    }
-
-    fn color_pair_button(&mut self, left: Color32, right: Color32) -> Response;
-
-    fn color_picker(&mut self, color: &mut Color32, hex: &mut String) -> Response;
-}
-
-impl UiExt for Ui {
-    fn section(&mut self, title: impl Into<String>, add_contents: impl FnOnce(&mut Ui)) {
-        let title: String = title.into();
-        let mut frame = Frame::group(self.style());
-        frame.outer_margin.top += 10.0;
-        frame.inner_margin.top += 2.0;
-        let res = self.push_id(&title, |ui| {
-            frame.show(ui, |ui| {
-                ui.set_max_width(ui.available_width());
-                add_contents(ui);
-            })
-        });
-        let text = RichText::new(title).background_color(self.style().visuals.panel_fill);
-        let old_rect = res.response.rect;
-        let mut text_rect = old_rect;
-        text_rect.min.x += 6.0;
-        self.allocate_new_ui(UiBuilder::new().max_rect(text_rect), |ui| ui.label(text));
-        if old_rect.width() > 0.0 {
-            self.advance_cursor_after_rect(old_rect);
-        }
-    }
-
-    fn selectable_button(&mut self, selected: bool, text: impl Into<WidgetText>) -> Response {
-        self.style_mut().visuals.widgets.inactive.bg_fill = Color32::TRANSPARENT;
-        self.style_mut().visuals.widgets.hovered.bg_fill = Color32::TRANSPARENT;
-        self.style_mut().visuals.widgets.active.bg_fill = Color32::TRANSPARENT;
-        let mut selected = selected;
-        self.checkbox(&mut selected, text)
-    }
-
-    fn color_pair_button(&mut self, left: Color32, right: Color32) -> Response {
-        let button_size = Vec2::new(60.0, 20.0);
-        let (rect, response) = self.allocate_at_least(button_size, Sense::click());
-        let center_x = rect.center().x;
-        let left_rect = rect.with_max_x(center_x);
-        self.painter().rect_filled(left_rect, 0.0, left);
-        let right_rect = rect.with_min_x(center_x);
-        self.painter().rect_filled(right_rect, 0.0, right);
-
-        let style = self.style().interact(&response);
-        self.painter().rect_stroke(rect, 0.0, style.fg_stroke);
-        response
-    }
-
-    fn color_picker(&mut self, color: &mut Color32, hex: &mut String) -> Response {
-        self.allocate_ui_with_layout(
-            Vec2::new(100.0, 130.0),
-            Layout::top_down_justified(egui::Align::Center),
-            |ui| {
-                let (rect, _) = ui.allocate_at_least(Vec2::new(100.0, 100.0), Sense::hover());
-                ui.painter().rect_filled(rect, 0.0, *color);
-                let resp = ui.text_edit_singleline(hex);
-                if resp.changed() {
-                    if let Ok(new_color) = HexColor::from_str_without_hash(hex) {
-                        *color = new_color.color();
-                    }
-                }
-                resp
-            },
-        )
-        .inner
-    }
-}
-
-enum Direction {
-    Up,
-    Down,
-}
-
-pub trait Number:
-    Copy
-    + One
-    + CheckedAdd
-    + CheckedSub
-    + Eq
-    + Ord
-    + Display
-    + FromStr
-    + FromRadix16
-    + UpperHex
-    + Send
-    + Sync
-    + 'static
-{
-}
-impl<
-    T: Copy
-        + One
-        + CheckedAdd
-        + CheckedSub
-        + Eq
-        + Ord
-        + Display
-        + FromStr
-        + FromRadix16
-        + UpperHex
-        + Send
-        + Sync
-        + 'static,
-> Number for T
-{
-}
-
-pub struct NumberEdit<'a, T: Number> {
-    value: &'a mut T,
-    increment: T,
-    precision: usize,
-    min: Option<T>,
-    max: Option<T>,
-    desired_width: Option<f32>,
-    arrows: bool,
-    hex: bool,
-}
-
-impl<'a, T: Number> NumberEdit<'a, T> {
-    pub fn new(value: &'a mut T) -> Self {
-        Self {
-            value,
-            increment: T::one(),
-            precision: 3,
-            min: None,
-            max: None,
-            desired_width: None,
-            arrows: true,
-            hex: false,
-        }
-    }
-
-    pub fn precision(self, precision: usize) -> Self {
-        Self { precision, ..self }
-    }
-
-    pub fn range(self, range: impl RangeBounds<T>) -> Self {
-        let min = match range.start_bound() {
-            Bound::Unbounded => None,
-            Bound::Included(t) => Some(*t),
-            Bound::Excluded(t) => t.checked_add(&self.increment),
-        };
-        let max = match range.end_bound() {
-            Bound::Unbounded => None,
-            Bound::Included(t) => Some(*t),
-            Bound::Excluded(t) => t.checked_sub(&self.increment),
-        };
-        Self { min, max, ..self }
-    }
-
-    pub fn desired_width(self, desired_width: f32) -> Self {
-        Self {
-            desired_width: Some(desired_width),
-            ..self
-        }
-    }
-
-    pub fn arrows(self, arrows: bool) -> Self {
-        Self { arrows, ..self }
-    }
-
-    pub fn hex(self, hex: bool) -> Self {
-        Self { hex, ..self }
-    }
-}
-
-impl<T: Number> Widget for NumberEdit<'_, T> {
-    fn ui(self, ui: &mut Ui) -> Response {
-        let id = ui.id();
-        let to_string = |val: &T| {
-            if self.hex {
-                format!("{val:.0$X}", self.precision)
-            } else {
-                format!("{val:.0$}", self.precision)
-            }
-        };
-        let from_string = |val: &str| {
-            if self.hex {
-                let bytes = val.as_bytes();
-                let (result, consumed) = T::from_radix_16(bytes);
-                (consumed == bytes.len()).then_some(result)
-            } else {
-                val.parse::<T>().ok()
-            }
-        };
-
-        let (last_value, mut str, focus) = ui.memory(|m| {
-            let (lv, s) = m
-                .data
-                .get_temp(id)
-                .unwrap_or((*self.value, to_string(self.value)));
-            let focus = m.has_focus(id);
-            (lv, s, focus)
-        });
-        let mut stale = false;
-        if *self.value != last_value {
-            str = to_string(self.value);
-            stale = true;
-        }
-        let valid = from_string(&str).is_some_and(|v: T| v == *self.value);
-        let mut up_pressed = false;
-        let mut down_pressed = false;
-        if focus {
-            ui.input_mut(|i| {
-                i.events.retain(|e| match e {
-                    Event::Key {
-                        key: Key::ArrowUp,
-                        pressed: true,
-                        ..
-                    } => {
-                        up_pressed = true;
-                        false
-                    }
-                    Event::Key {
-                        key: Key::ArrowDown,
-                        pressed: true,
-                        ..
-                    } => {
-                        down_pressed = true;
-                        false
-                    }
-                    _ => true,
-                })
-            });
-        }
-        let mut desired_width = self
-            .desired_width
-            .unwrap_or_else(|| ui.spacing().text_edit_width);
-        if self.arrows {
-            desired_width -= 16.0;
-        }
-        let text = TextEdit::singleline(&mut str)
-            .horizontal_align(Align::Max)
-            .id(id)
-            .desired_width(desired_width)
-            .margin(Margin {
-                left: 4.0,
-                right: if self.arrows { 20.0 } else { 4.0 },
-                top: 2.0,
-                bottom: 2.0,
-            });
-        let mut res = if valid {
-            ui.add(text)
-        } else {
-            let message = match (self.min, self.max) {
-                (Some(min), Some(max)) => format!(
-                    "Please enter a number between {} and {}.",
-                    to_string(&min),
-                    to_string(&max)
-                ),
-                (Some(min), None) => {
-                    format!("Please enter a number greater than {}.", to_string(&min))
-                }
-                (None, Some(max)) => {
-                    format!("Please enter a number less than {}.", to_string(&max))
-                }
-                (None, None) => "Please enter a number.".to_string(),
-            };
-            ui.scope(|ui| {
-                let style = ui.style_mut();
-                style.visuals.selection.stroke.color = style.visuals.error_fg_color;
-                style.visuals.widgets.hovered.bg_stroke.color =
-                    style.visuals.error_fg_color.gamma_multiply(0.60);
-                ui.add(text)
-            })
-            .inner
-            .on_hover_text(message)
-        };
-
-        let mut delta = None;
-        if self.arrows {
-            let arrow_left = res.rect.max.x + 4.0;
-            let arrow_right = res.rect.max.x + 20.0;
-            let arrow_top = res.rect.min.y - 2.0;
-            let arrow_middle = (res.rect.min.y + res.rect.max.y) / 2.0;
-            let arrow_bottom = res.rect.max.y + 2.0;
-
-            let top_arrow_rect = Rect {
-                min: (arrow_left, arrow_top).into(),
-                max: (arrow_right, arrow_middle).into(),
-            };
-            if draw_arrow(ui, top_arrow_rect, true).clicked_or_dragged() || up_pressed {
-                delta = Some(Direction::Up);
-            }
-            let bottom_arrow_rect = Rect {
-                min: (arrow_left, arrow_middle).into(),
-                max: (arrow_right, arrow_bottom).into(),
-            };
-            if draw_arrow(ui, bottom_arrow_rect, false).clicked_or_dragged() || down_pressed {
-                delta = Some(Direction::Down);
-            }
-        }
-
-        let in_range =
-            |val: &T| self.min.is_none_or(|m| &m <= val) && self.max.is_none_or(|m| &m >= val);
-        if let Some(dir) = delta {
-            let value = match dir {
-                Direction::Up => self.value.checked_add(&self.increment),
-                Direction::Down => self.value.checked_sub(&self.increment),
-            };
-            if let Some(new_value) = value.filter(in_range) {
-                if *self.value != new_value {
-                    res.mark_changed();
-                }
-                *self.value = new_value;
-            }
-            str = to_string(self.value);
-            stale = true;
-        } else if res.changed {
-            if let Some(new_value) = from_string(&str).filter(in_range) {
-                if *self.value != new_value {
-                    res.mark_changed();
-                }
-                *self.value = new_value;
-            }
-            stale = true;
-        }
-        if stale {
-            ui.memory_mut(|m| m.data.insert_temp(id, (*self.value, str)));
-        }
-        res
-    }
-}
-
-fn draw_arrow(ui: &mut Ui, rect: Rect, up: bool) -> Response {
-    let arrow_res = ui
-        .allocate_rect(
-            rect,
-            Sense {
-                click: true,
-                drag: true,
-                focusable: false,
-            },
-        )
-        .on_hover_cursor(CursorIcon::Default);
-    let visuals = ui.style().visuals.widgets.style(&arrow_res);
-    let painter = ui.painter_at(arrow_res.rect);
-
-    let rounding = if up {
-        Rounding {
-            ne: 2.0,
-            ..Rounding::ZERO
-        }
-    } else {
-        Rounding {
-            se: 2.0,
-            ..Rounding::ZERO
-        }
-    };
-    painter.rect_filled(arrow_res.rect, rounding, visuals.bg_fill);
-
-    let left = rect.left() + 4.0;
-    let center = (rect.left() + rect.right()) / 2.0;
-    let right = rect.right() - 4.0;
-    let top = rect.top() + 3.0;
-    let bottom = rect.bottom() - 3.0;
-    let points = if up {
-        vec![
-            (left, bottom).into(),
-            (center, top).into(),
-            (right, bottom).into(),
-        ]
-    } else {
-        vec![
-            (right, top).into(),
-            (center, bottom).into(),
-            (left, top).into(),
-        ]
-    };
-    painter.add(Shape::convex_polygon(
-        points,
-        visuals.fg_stroke.color,
-        Stroke::NONE,
-    ));
-    arrow_res
-}
-
-trait ResponseExt {
-    fn clicked_or_dragged(&self) -> bool;
-}
-
-impl ResponseExt for Response {
-    fn clicked_or_dragged(&self) -> bool {
-        self.clicked() || self.dragged()
-    }
-}

src/window/vip.rs

@@ -1,14 +0,0 @@
-mod bgmap;
-mod chardata;
-mod framebuffer;
-mod object;
-mod registers;
-mod utils;
-mod world;
-
-pub use bgmap::*;
-pub use chardata::*;
-pub use framebuffer::*;
-pub use object::*;
-pub use registers::*;
-pub use world::*;

src/window/vip/bgmap.rs

@@ -1,315 +0,0 @@
-use std::sync::Arc;
-
-use egui::{
-    Align, CentralPanel, Checkbox, Color32, ComboBox, Context, Image, ScrollArea, Slider, TextEdit,
-    TextureOptions, Ui, ViewportBuilder, ViewportId,
-};
-use egui_extras::{Column, Size, StripBuilder, TableBuilder};
-
-use crate::{
-    emulator::SimId,
-    images::{ImageBuffer, ImageParams, ImageProcessor, ImageRenderer, ImageTextureLoader},
-    memory::{MemoryClient, MemoryView},
-    window::{
-        AppWindow,
-        utils::{NumberEdit, UiExt},
-    },
-};
-
-use super::utils::{self, CellData, CharacterGrid};
-
-pub struct BgMapWindow {
-    sim_id: SimId,
-    loader: Arc<ImageTextureLoader>,
-    memory: Arc<MemoryClient>,
-    bgmaps: MemoryView,
-    cell_index: usize,
-    generic_palette: bool,
-    params: ImageParams<BgMapParams>,
-    scale: f32,
-    show_grid: bool,
-}
-
-impl BgMapWindow {
-    pub fn new(sim_id: SimId, memory: &Arc<MemoryClient>, images: &mut ImageProcessor) -> Self {
-        let renderer = BgMapRenderer::new(sim_id, memory);
-        let ([cell, bgmap], params) = images.add(renderer, BgMapParams::default());
-        let loader =
-            ImageTextureLoader::new([("vip://cell".into(), cell), ("vip://bgmap".into(), bgmap)]);
-        Self {
-            sim_id,
-            loader: Arc::new(loader),
-            memory: memory.clone(),
-            bgmaps: memory.watch(sim_id, 0x00020000, 0x20000),
-            cell_index: params.cell_index,
-            generic_palette: params.generic_palette,
-            params,
-            scale: 1.0,
-            show_grid: false,
-        }
-    }
-
-    fn show_form(&mut self, ui: &mut Ui) {
-        let row_height = ui.spacing().interact_size.y;
-        ui.vertical(|ui| {
-            TableBuilder::new(ui)
-                .column(Column::auto())
-                .column(Column::remainder())
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Map");
-                        });
-                        row.col(|ui| {
-                            let mut bgmap_index = self.cell_index / 4096;
-                            ui.add(NumberEdit::new(&mut bgmap_index).range(0..16));
-                            if bgmap_index != self.cell_index / 4096 {
-                                self.cell_index = (bgmap_index * 4096) + (self.cell_index % 4096);
-                            }
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Cell");
-                        });
-                        row.col(|ui| {
-                            ui.add(NumberEdit::new(&mut self.cell_index).range(0..16 * 4096));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Address");
-                        });
-                        row.col(|ui| {
-                            let address = 0x00020000 + (self.cell_index * 2);
-                            let mut address_str = format!("{address:08x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut address_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                });
-            let image = Image::new("vip://cell")
-                .maintain_aspect_ratio(true)
-                .texture_options(TextureOptions::NEAREST);
-            ui.add(image);
-            ui.section("Cell", |ui| {
-                let mut data = self.bgmaps.borrow().read::<u16>(self.cell_index);
-                let mut cell = CellData::parse(data);
-                TableBuilder::new(ui)
-                    .column(Column::remainder())
-                    .column(Column::remainder())
-                    .body(|mut body| {
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("Character");
-                            });
-                            row.col(|ui| {
-                                ui.add(NumberEdit::new(&mut cell.char_index).range(0..2048));
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("Palette");
-                            });
-                            row.col(|ui| {
-                                ComboBox::from_id_salt("palette")
-                                    .selected_text(format!("BG {}", cell.palette_index))
-                                    .width(ui.available_width())
-                                    .show_ui(ui, |ui| {
-                                        for palette in 0..4 {
-                                            ui.selectable_value(
-                                                &mut cell.palette_index,
-                                                palette,
-                                                format!("BG {palette}"),
-                                            );
-                                        }
-                                    });
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.add(Checkbox::new(&mut cell.hflip, "H-flip"));
-                            });
-                            row.col(|ui| {
-                                ui.add(Checkbox::new(&mut cell.vflip, "V-flip"));
-                            });
-                        });
-                    });
-                if cell.update(&mut data) {
-                    let address = 0x00020000 + (self.cell_index * 2);
-                    self.memory.write(self.sim_id, address as u32, &data);
-                }
-            });
-            ui.section("Display", |ui| {
-                ui.horizontal(|ui| {
-                    ui.label("Scale");
-                    ui.spacing_mut().slider_width = ui.available_width();
-                    let slider = Slider::new(&mut self.scale, 1.0..=10.0)
-                        .step_by(1.0)
-                        .show_value(false);
-                    ui.add(slider);
-                });
-                ui.checkbox(&mut self.show_grid, "Show grid");
-                ui.checkbox(&mut self.generic_palette, "Generic palette");
-            });
-        });
-        self.params.write(BgMapParams {
-            cell_index: self.cell_index,
-            generic_palette: self.generic_palette,
-        });
-    }
-
-    fn show_bgmap(&mut self, ui: &mut Ui) {
-        let grid = CharacterGrid::new("vip://bgmap")
-            .with_scale(self.scale)
-            .with_grid(self.show_grid)
-            .with_selected(self.cell_index % 4096);
-        if let Some(selected) = grid.show(ui) {
-            self.cell_index = (self.cell_index / 4096 * 4096) + selected;
-        }
-    }
-}
-
-impl AppWindow for BgMapWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of(format!("bgmap-{}", self.sim_id))
-    }
-
-    fn sim_id(&self) -> SimId {
-        self.sim_id
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title(format!("BG Map Data ({})", self.sim_id))
-            .with_inner_size((640.0, 480.0))
-    }
-
-    fn on_init(&mut self, ctx: &Context, _render_state: &egui_wgpu::RenderState) {
-        ctx.add_texture_loader(self.loader.clone());
-    }
-
-    fn show(&mut self, ctx: &Context) {
-        CentralPanel::default().show(ctx, |ui| {
-            ui.horizontal_top(|ui| {
-                StripBuilder::new(ui)
-                    .size(Size::relative(0.3).at_most(200.0))
-                    .size(Size::remainder())
-                    .horizontal(|mut strip| {
-                        strip.cell(|ui| {
-                            ScrollArea::vertical().show(ui, |ui| self.show_form(ui));
-                        });
-                        strip.cell(|ui| {
-                            ScrollArea::both().show(ui, |ui| self.show_bgmap(ui));
-                        });
-                    })
-            });
-        });
-    }
-}
-
-#[derive(Default, Clone, PartialEq, Eq)]
-struct BgMapParams {
-    cell_index: usize,
-    generic_palette: bool,
-}
-
-struct BgMapRenderer {
-    chardata: MemoryView,
-    bgmaps: MemoryView,
-    brightness: MemoryView,
-    palettes: MemoryView,
-}
-
-impl BgMapRenderer {
-    pub fn new(sim_id: SimId, memory: &MemoryClient) -> Self {
-        Self {
-            chardata: memory.watch(sim_id, 0x00078000, 0x8000),
-            bgmaps: memory.watch(sim_id, 0x00020000, 0x20000),
-            brightness: memory.watch(sim_id, 0x0005f824, 8),
-            palettes: memory.watch(sim_id, 0x0005f860, 16),
-        }
-    }
-
-    fn render_bgmap(&self, image: &mut ImageBuffer, bgmap_index: usize, generic_palette: bool) {
-        let chardata = self.chardata.borrow();
-        let bgmaps = self.bgmaps.borrow();
-        let brightness = self.brightness.borrow();
-        let palettes = self.palettes.borrow();
-
-        let brts = brightness.read::<[u8; 8]>(0);
-        let colors = if generic_palette {
-            [utils::generic_palette(Color32::RED); 4]
-        } else {
-            [0, 2, 4, 6].map(|i| utils::palette_colors(palettes.read(i), &brts, Color32::RED))
-        };
-
-        for (i, cell) in bgmaps.range::<u16>(bgmap_index * 4096, 4096).enumerate() {
-            let CellData {
-                char_index,
-                vflip,
-                hflip,
-                palette_index,
-            } = CellData::parse(cell);
-            let char = chardata.read::<[u16; 8]>(char_index);
-            let palette = &colors[palette_index];
-
-            for row in 0..8 {
-                let y = row + (i / 64) * 8;
-                for (col, pixel) in utils::read_char_row(&char, hflip, vflip, row).enumerate() {
-                    let x = col + (i % 64) * 8;
-                    image.write((x, y), palette[pixel as usize]);
-                }
-            }
-        }
-    }
-
-    fn render_bgmap_cell(&self, image: &mut ImageBuffer, index: usize, generic_palette: bool) {
-        let chardata = self.chardata.borrow();
-        let bgmaps = self.bgmaps.borrow();
-        let brightness = self.brightness.borrow();
-        let palettes = self.palettes.borrow();
-
-        let brts = brightness.read::<[u8; 8]>(0);
-
-        let cell = bgmaps.read::<u16>(index);
-
-        let CellData {
-            char_index,
-            vflip,
-            hflip,
-            palette_index,
-        } = CellData::parse(cell);
-        let char = chardata.read::<[u16; 8]>(char_index);
-        let palette = if generic_palette {
-            utils::generic_palette(Color32::RED)
-        } else {
-            utils::palette_colors(palettes.read(palette_index * 2), &brts, Color32::RED)
-        };
-
-        for row in 0..8 {
-            for (col, pixel) in utils::read_char_row(&char, hflip, vflip, row).enumerate() {
-                image.write((col, row), palette[pixel as usize]);
-            }
-        }
-    }
-}
-
-impl ImageRenderer<2> for BgMapRenderer {
-    type Params = BgMapParams;
-
-    fn sizes(&self) -> [[usize; 2]; 2] {
-        [[8, 8], [8 * 64, 8 * 64]]
-    }
-
-    fn render(&mut self, params: &Self::Params, images: &mut [ImageBuffer; 2]) {
-        self.render_bgmap_cell(&mut images[0], params.cell_index, params.generic_palette);
-        self.render_bgmap(
-            &mut images[1],
-            params.cell_index / 4096,
-            params.generic_palette,
-        );
-    }
-}

src/window/vip/chardata.rs

@@ -1,356 +0,0 @@
-use std::{fmt::Display, sync::Arc};
-
-use egui::{
-    Align, CentralPanel, Color32, ComboBox, Context, Image, ScrollArea, Slider, TextEdit,
-    TextureOptions, Ui, Vec2, ViewportBuilder, ViewportId,
-};
-use egui_extras::{Column, Size, StripBuilder, TableBuilder};
-use serde::{Deserialize, Serialize};
-
-use crate::{
-    emulator::SimId,
-    images::{ImageBuffer, ImageParams, ImageProcessor, ImageRenderer, ImageTextureLoader},
-    memory::{MemoryClient, MemoryView},
-    window::{
-        AppWindow,
-        utils::{NumberEdit, UiExt as _},
-    },
-};
-
-use super::utils::{self, CharacterGrid};
-
-#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
-pub enum Palette {
-    #[default]
-    Generic,
-    Bg0,
-    Bg1,
-    Bg2,
-    Bg3,
-    Obj0,
-    Obj1,
-    Obj2,
-    Obj3,
-}
-
-impl Palette {
-    pub const fn values() -> [Palette; 9] {
-        [
-            Self::Generic,
-            Self::Bg0,
-            Self::Bg1,
-            Self::Bg2,
-            Self::Bg3,
-            Self::Obj0,
-            Self::Obj1,
-            Self::Obj2,
-            Self::Obj3,
-        ]
-    }
-
-    pub const fn offset(self) -> Option<usize> {
-        match self {
-            Self::Generic => None,
-            Self::Bg0 => Some(0),
-            Self::Bg1 => Some(2),
-            Self::Bg2 => Some(4),
-            Self::Bg3 => Some(6),
-            Self::Obj0 => Some(8),
-            Self::Obj1 => Some(10),
-            Self::Obj2 => Some(12),
-            Self::Obj3 => Some(14),
-        }
-    }
-}
-
-impl Display for Palette {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::Generic => f.write_str("Generic"),
-            Self::Bg0 => f.write_str("BG 0"),
-            Self::Bg1 => f.write_str("BG 1"),
-            Self::Bg2 => f.write_str("BG 2"),
-            Self::Bg3 => f.write_str("BG 3"),
-            Self::Obj0 => f.write_str("OBJ 0"),
-            Self::Obj1 => f.write_str("OBJ 1"),
-            Self::Obj2 => f.write_str("OBJ 2"),
-            Self::Obj3 => f.write_str("OBJ 3"),
-        }
-    }
-}
-
-pub struct CharacterDataWindow {
-    sim_id: SimId,
-    loader: Arc<ImageTextureLoader>,
-    brightness: MemoryView,
-    palettes: MemoryView,
-    palette: Palette,
-    index: usize,
-    params: ImageParams<CharDataParams>,
-    scale: f32,
-    show_grid: bool,
-}
-
-impl CharacterDataWindow {
-    pub fn new(sim_id: SimId, memory: &MemoryClient, images: &mut ImageProcessor) -> Self {
-        let renderer = CharDataRenderer::new(sim_id, memory);
-        let ([char, chardata], params) = images.add(renderer, CharDataParams::default());
-        let loader = ImageTextureLoader::new([
-            ("vip://char".into(), char),
-            ("vip://chardata".into(), chardata),
-        ]);
-        Self {
-            sim_id,
-            loader: Arc::new(loader),
-            brightness: memory.watch(sim_id, 0x0005f824, 8),
-            palettes: memory.watch(sim_id, 0x0005f860, 16),
-            palette: params.palette,
-            index: params.index,
-            params,
-            scale: 4.0,
-            show_grid: true,
-        }
-    }
-
-    fn show_form(&mut self, ui: &mut Ui) {
-        let row_height = ui.spacing().interact_size.y;
-        ui.vertical(|ui| {
-            TableBuilder::new(ui)
-                .column(Column::auto())
-                .column(Column::remainder())
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Index");
-                        });
-                        row.col(|ui| {
-                            ui.add(NumberEdit::new(&mut self.index).range(0..2048));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Address");
-                        });
-                        row.col(|ui| {
-                            let address = match self.index {
-                                0x000..0x200 => 0x00060000 + self.index * 16,
-                                0x200..0x400 => 0x000e0000 + (self.index - 0x200) * 16,
-                                0x400..0x600 => 0x00160000 + (self.index - 0x400) * 16,
-                                0x600..0x800 => 0x001e0000 + (self.index - 0x600) * 16,
-                                _ => unreachable!("can't happen"),
-                            };
-                            let mut address_str = format!("{address:08x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut address_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Mirror");
-                        });
-                        row.col(|ui| {
-                            let mirror = 0x00078000 + (self.index * 16);
-                            let mut mirror_str = format!("{mirror:08x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut mirror_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                });
-            let image = Image::new("vip://char")
-                .maintain_aspect_ratio(true)
-                .texture_options(TextureOptions::NEAREST);
-            ui.add(image);
-            ui.section("Colors", |ui| {
-                ui.horizontal(|ui| {
-                    ui.label("Palette");
-                    ComboBox::from_id_salt("palette")
-                        .selected_text(self.palette.to_string())
-                        .width(ui.available_width())
-                        .show_ui(ui, |ui| {
-                            for palette in Palette::values() {
-                                ui.selectable_value(
-                                    &mut self.palette,
-                                    palette,
-                                    palette.to_string(),
-                                );
-                            }
-                        });
-                });
-                TableBuilder::new(ui)
-                    .columns(Column::remainder(), 4)
-                    .body(|mut body| {
-                        let palette = self.load_palette_colors();
-                        body.row(30.0, |mut row| {
-                            for color in palette {
-                                row.col(|ui| {
-                                    let rect = ui.available_rect_before_wrap();
-                                    let scale = rect.height() / rect.width();
-                                    let rect = rect.scale_from_center2(Vec2::new(scale, 1.0));
-                                    ui.painter().rect_filled(rect, 0.0, color);
-                                });
-                            }
-                        });
-                    });
-            });
-            ui.section("Display", |ui| {
-                ui.horizontal(|ui| {
-                    ui.label("Scale");
-                    ui.spacing_mut().slider_width = ui.available_width();
-                    let slider = Slider::new(&mut self.scale, 1.0..=10.0)
-                        .step_by(1.0)
-                        .show_value(false);
-                    ui.add(slider);
-                });
-                ui.checkbox(&mut self.show_grid, "Show grid");
-            });
-        });
-
-        self.params.write(CharDataParams {
-            palette: self.palette,
-            index: self.index,
-        });
-    }
-
-    fn load_palette_colors(&self) -> [Color32; 4] {
-        let Some(offset) = self.palette.offset() else {
-            return utils::generic_palette(Color32::RED);
-        };
-        let palette = self.palettes.borrow().read(offset);
-        let brightnesses = self.brightness.borrow();
-        let brts = brightnesses.read(0);
-        utils::palette_colors(palette, &brts, Color32::RED)
-    }
-
-    fn show_chardata(&mut self, ui: &mut Ui) {
-        let grid = CharacterGrid::new("vip://chardata")
-            .with_scale(self.scale)
-            .with_grid(self.show_grid)
-            .with_selected(self.index);
-        if let Some(selected) = grid.show(ui) {
-            self.index = selected;
-        }
-    }
-}
-
-impl AppWindow for CharacterDataWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of(format!("chardata-{}", self.sim_id))
-    }
-
-    fn sim_id(&self) -> SimId {
-        self.sim_id
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title(format!("Character Data ({})", self.sim_id))
-            .with_inner_size((640.0, 480.0))
-    }
-
-    fn on_init(&mut self, ctx: &Context, _render_state: &egui_wgpu::RenderState) {
-        ctx.add_texture_loader(self.loader.clone());
-    }
-
-    fn show(&mut self, ctx: &Context) {
-        CentralPanel::default().show(ctx, |ui| {
-            ui.horizontal_top(|ui| {
-                StripBuilder::new(ui)
-                    .size(Size::relative(0.3).at_most(200.0))
-                    .size(Size::remainder())
-                    .horizontal(|mut strip| {
-                        strip.cell(|ui| {
-                            ScrollArea::vertical().show(ui, |ui| self.show_form(ui));
-                        });
-                        strip.cell(|ui| {
-                            ScrollArea::both().show(ui, |ui| self.show_chardata(ui));
-                        });
-                    });
-            });
-        });
-    }
-}
-
-#[derive(Serialize, Deserialize, Clone, PartialEq, Eq, Hash)]
-enum CharDataResource {
-    Character { palette: Palette, index: usize },
-    CharacterData { palette: Palette },
-}
-
-#[derive(Clone, Default, PartialEq, Eq)]
-struct CharDataParams {
-    palette: Palette,
-    index: usize,
-}
-
-struct CharDataRenderer {
-    chardata: MemoryView,
-    brightness: MemoryView,
-    palettes: MemoryView,
-}
-
-impl ImageRenderer<2> for CharDataRenderer {
-    type Params = CharDataParams;
-
-    fn sizes(&self) -> [[usize; 2]; 2] {
-        [[8, 8], [16 * 8, 128 * 8]]
-    }
-
-    fn render(&mut self, params: &Self::Params, image: &mut [ImageBuffer; 2]) {
-        self.render_character(&mut image[0], params.palette, params.index);
-        self.render_character_data(&mut image[1], params.palette);
-    }
-}
-
-impl CharDataRenderer {
-    pub fn new(sim_id: SimId, memory: &MemoryClient) -> Self {
-        Self {
-            chardata: memory.watch(sim_id, 0x00078000, 0x8000),
-            brightness: memory.watch(sim_id, 0x0005f824, 8),
-            palettes: memory.watch(sim_id, 0x0005f860, 16),
-        }
-    }
-
-    fn render_character(&self, image: &mut ImageBuffer, palette: Palette, index: usize) {
-        if index >= 2048 {
-            return;
-        }
-        let palette = self.load_palette(palette);
-        let chardata = self.chardata.borrow();
-        let character = chardata.range::<u16>(index * 8, 8);
-        for (row, pixels) in character.enumerate() {
-            for col in 0..8 {
-                let char = (pixels >> (col * 2)) & 0x03;
-                image.write((col, row), palette[char as usize]);
-            }
-        }
-    }
-
-    fn render_character_data(&self, image: &mut ImageBuffer, palette: Palette) {
-        let palette = self.load_palette(palette);
-        let chardata = self.chardata.borrow();
-        for (row, pixels) in chardata.range::<u16>(0, 8 * 2048).enumerate() {
-            let char_index = row / 8;
-            let row_index = row % 8;
-            let x = (char_index % 16) * 8;
-            let y = (char_index / 16) * 8 + row_index;
-            for col in 0..8 {
-                let char = (pixels >> (col * 2)) & 0x03;
-                image.write((x + col, y), palette[char as usize]);
-            }
-        }
-    }
-
-    fn load_palette(&self, palette: Palette) -> [Color32; 4] {
-        let Some(offset) = palette.offset() else {
-            return utils::GENERIC_PALETTE.map(|p| utils::shade(p, Color32::RED));
-        };
-        let palette = self.palettes.borrow().read(offset);
-        let brightnesses = self.brightness.borrow();
-        let brts = brightnesses.read(0);
-        utils::palette_colors(palette, &brts, Color32::RED)
-    }
-}

src/window/vip/framebuffer.rs

@@ -1,267 +0,0 @@
-use std::sync::Arc;
-
-use egui::{
-    Align, CentralPanel, Color32, Context, Image, ScrollArea, Slider, TextEdit, TextureOptions, Ui,
-    ViewportBuilder, ViewportId,
-};
-use egui_extras::{Column, Size, StripBuilder, TableBuilder};
-
-use crate::{
-    emulator::SimId,
-    images::{ImageBuffer, ImageParams, ImageProcessor, ImageRenderer, ImageTextureLoader},
-    memory::{MemoryClient, MemoryView},
-    window::{
-        AppWindow,
-        utils::{NumberEdit, UiExt as _},
-    },
-};
-
-use super::utils;
-
-pub struct FrameBufferWindow {
-    sim_id: SimId,
-    loader: Arc<ImageTextureLoader>,
-    index: usize,
-    left: bool,
-    right: bool,
-    generic_palette: bool,
-    params: ImageParams<FrameBufferParams>,
-    scale: f32,
-}
-
-impl FrameBufferWindow {
-    pub fn new(sim_id: SimId, memory: &MemoryClient, images: &mut ImageProcessor) -> Self {
-        let initial_params = FrameBufferParams {
-            index: 0,
-            left: true,
-            right: true,
-            generic_palette: false,
-            left_color: Color32::from_rgb(0xff, 0x00, 0x00),
-            right_color: Color32::from_rgb(0x00, 0xc6, 0xf0),
-        };
-        let renderer = FrameBufferRenderer::new(sim_id, memory);
-        let ([buffer], params) = images.add(renderer, initial_params);
-        let loader = ImageTextureLoader::new([("vip://buffer".into(), buffer)]);
-        Self {
-            sim_id,
-            loader: Arc::new(loader),
-            index: params.index,
-            left: params.left,
-            right: params.right,
-            generic_palette: params.generic_palette,
-            params,
-            scale: 2.0,
-        }
-    }
-
-    fn show_form(&mut self, ui: &mut Ui) {
-        let row_height = ui.spacing().interact_size.y;
-        ui.vertical(|ui| {
-            TableBuilder::new(ui)
-                .column(Column::auto())
-                .column(Column::remainder())
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Index");
-                        });
-                        row.col(|ui| {
-                            ui.add(NumberEdit::new(&mut self.index).range(0..2));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Left");
-                        });
-                        row.col(|ui| {
-                            let address = self.index * 0x00008000;
-                            let mut address_str = format!("{address:08x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut address_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Right");
-                        });
-                        row.col(|ui| {
-                            let address = self.index * 0x00008000 + 0x00010000;
-                            let mut address_str = format!("{address:08x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut address_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                });
-            ui.section("Display", |ui| {
-                ui.horizontal(|ui| {
-                    ui.label("Scale");
-                    ui.spacing_mut().slider_width = ui.available_width();
-                    let slider = Slider::new(&mut self.scale, 1.0..=10.0)
-                        .step_by(1.0)
-                        .show_value(false);
-                    ui.add(slider);
-                });
-                TableBuilder::new(ui)
-                    .columns(Column::remainder(), 2)
-                    .body(|mut body| {
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.checkbox(&mut self.left, "Left");
-                            });
-                            row.col(|ui| {
-                                ui.checkbox(&mut self.right, "Right");
-                            });
-                        });
-                    });
-                ui.checkbox(&mut self.generic_palette, "Generic colors");
-            });
-        });
-
-        self.params.write(FrameBufferParams {
-            index: self.index,
-            left: self.left,
-            right: self.right,
-            generic_palette: self.generic_palette,
-            ..*self.params
-        });
-    }
-
-    fn show_buffers(&mut self, ui: &mut Ui) {
-        let image = Image::new("vip://buffer")
-            .fit_to_original_size(self.scale)
-            .texture_options(TextureOptions::NEAREST);
-        ui.add(image);
-    }
-}
-
-impl AppWindow for FrameBufferWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of(format!("framebuffer-{}", self.sim_id))
-    }
-
-    fn sim_id(&self) -> SimId {
-        self.sim_id
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title(format!("Frame Buffers ({})", self.sim_id))
-            .with_inner_size((640.0, 480.0))
-    }
-
-    fn on_init(&mut self, ctx: &Context, _render_state: &egui_wgpu::RenderState) {
-        ctx.add_texture_loader(self.loader.clone());
-    }
-
-    fn show(&mut self, ctx: &Context) {
-        CentralPanel::default().show(ctx, |ui| {
-            ui.horizontal_top(|ui| {
-                StripBuilder::new(ui)
-                    .size(Size::relative(0.3).at_most(200.0))
-                    .size(Size::remainder())
-                    .horizontal(|mut strip| {
-                        strip.cell(|ui| {
-                            ScrollArea::vertical().show(ui, |ui| self.show_form(ui));
-                        });
-                        strip.cell(|ui| {
-                            ScrollArea::both().show(ui, |ui| self.show_buffers(ui));
-                        });
-                    });
-            });
-        });
-    }
-}
-
-#[derive(Clone, PartialEq, Eq)]
-struct FrameBufferParams {
-    index: usize,
-    left: bool,
-    right: bool,
-    generic_palette: bool,
-    left_color: Color32,
-    right_color: Color32,
-}
-
-struct FrameBufferRenderer {
-    buffers: [MemoryView; 4],
-    brightness: MemoryView,
-}
-
-impl FrameBufferRenderer {
-    fn new(sim_id: SimId, memory: &MemoryClient) -> Self {
-        Self {
-            buffers: [
-                memory.watch(sim_id, 0x00000000, 0x6000),
-                memory.watch(sim_id, 0x00008000, 0x6000),
-                memory.watch(sim_id, 0x00010000, 0x6000),
-                memory.watch(sim_id, 0x00018000, 0x6000),
-            ],
-            brightness: memory.watch(sim_id, 0x0005f824, 8),
-        }
-    }
-}
-
-impl ImageRenderer<1> for FrameBufferRenderer {
-    type Params = FrameBufferParams;
-
-    fn sizes(&self) -> [[usize; 2]; 1] {
-        [[384, 224]]
-    }
-
-    fn render(&mut self, params: &Self::Params, images: &mut [ImageBuffer; 1]) {
-        let image = &mut images[0];
-
-        let left_buffer = self.buffers[params.index].borrow();
-        let right_buffer = self.buffers[2 + params.index].borrow();
-
-        let colors = if params.generic_palette {
-            [
-                utils::generic_palette(params.left_color),
-                utils::generic_palette(params.right_color),
-            ]
-        } else {
-            let brts = self.brightness.borrow().read::<[u8; 8]>(0);
-            let shades = utils::parse_shades(&brts);
-            [
-                shades.map(|s| utils::shade(s, params.left_color)),
-                shades.map(|s| utils::shade(s, params.right_color)),
-            ]
-        };
-
-        let left_cols = left_buffer.range::<u8>(0, 0x6000);
-        let right_cols = right_buffer.range::<u8>(0, 0x6000);
-        for (index, (left, right)) in left_cols.zip(right_cols).enumerate() {
-            let top = (index % 64) * 4;
-            if top >= 224 {
-                continue;
-            }
-
-            let pixels = [0, 2, 4, 6].map(|i| {
-                let left = if params.left {
-                    colors[0][(left >> i) as usize & 0x3]
-                } else {
-                    Color32::BLACK
-                };
-                let right = if params.right {
-                    colors[1][(right >> i) as usize & 0x3]
-                } else {
-                    Color32::BLACK
-                };
-                Color32::from_rgb(
-                    left.r() + right.r(),
-                    left.g() + right.g(),
-                    left.b() + right.b(),
-                )
-            });
-            let x = index / 64;
-            for (i, pixel) in pixels.into_iter().enumerate() {
-                let y = top + i;
-                image.write((x, y), pixel);
-            }
-        }
-    }
-}

src/window/vip/object.rs

@@ -1,342 +0,0 @@
-use std::sync::Arc;
-
-use egui::{
-    Align, CentralPanel, Checkbox, Color32, ComboBox, Context, Image, ScrollArea, Slider, TextEdit,
-    TextureOptions, Ui, ViewportBuilder, ViewportId,
-};
-use egui_extras::{Column, Size, StripBuilder, TableBuilder};
-
-use crate::{
-    emulator::SimId,
-    images::{ImageBuffer, ImageParams, ImageProcessor, ImageRenderer, ImageTextureLoader},
-    memory::{MemoryClient, MemoryView},
-    window::{
-        AppWindow,
-        utils::{NumberEdit, UiExt as _},
-    },
-};
-
-use super::utils::{self, Object};
-
-pub struct ObjectWindow {
-    sim_id: SimId,
-    loader: Arc<ImageTextureLoader>,
-    memory: Arc<MemoryClient>,
-    objects: MemoryView,
-    index: usize,
-    generic_palette: bool,
-    params: ImageParams<ObjectParams>,
-    scale: f32,
-}
-
-impl ObjectWindow {
-    pub fn new(sim_id: SimId, memory: &Arc<MemoryClient>, images: &mut ImageProcessor) -> Self {
-        let initial_params = ObjectParams {
-            index: 0,
-            generic_palette: false,
-            left_color: Color32::from_rgb(0xff, 0x00, 0x00),
-            right_color: Color32::from_rgb(0x00, 0xc6, 0xf0),
-        };
-        let renderer = ObjectRenderer::new(sim_id, memory);
-        let ([zoom, full], params) = images.add(renderer, initial_params);
-        let loader =
-            ImageTextureLoader::new([("vip://zoom".into(), zoom), ("vip://full".into(), full)]);
-        Self {
-            sim_id,
-            loader: Arc::new(loader),
-            memory: memory.clone(),
-            objects: memory.watch(sim_id, 0x0003e000, 0x2000),
-            index: params.index,
-            generic_palette: params.generic_palette,
-            params,
-            scale: 1.0,
-        }
-    }
-
-    fn show_form(&mut self, ui: &mut Ui) {
-        let row_height = ui.spacing().interact_size.y;
-        ui.vertical(|ui| {
-            TableBuilder::new(ui)
-                .column(Column::auto())
-                .column(Column::remainder())
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Index");
-                        });
-                        row.col(|ui| {
-                            ui.add(NumberEdit::new(&mut self.index).range(0..1024));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("Address");
-                        });
-                        row.col(|ui| {
-                            let address = 0x3e000 + self.index * 8;
-                            let mut address_str = format!("{address:08x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut address_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                });
-            let image = Image::new("vip://zoom")
-                .maintain_aspect_ratio(true)
-                .texture_options(TextureOptions::NEAREST);
-            ui.add(image);
-            ui.section("Properties", |ui| {
-                let mut object = self.objects.borrow().read::<[u16; 4]>(self.index);
-                let mut obj = Object::parse(object);
-                TableBuilder::new(ui)
-                    .column(Column::remainder())
-                    .column(Column::remainder())
-                    .body(|mut body| {
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("Character");
-                            });
-                            row.col(|ui| {
-                                ui.add(NumberEdit::new(&mut obj.data.char_index).range(0..2048));
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("Palette");
-                            });
-                            row.col(|ui| {
-                                ComboBox::from_id_salt("palette")
-                                    .selected_text(format!("OBJ {}", obj.data.palette_index))
-                                    .width(ui.available_width())
-                                    .show_ui(ui, |ui| {
-                                        for palette in 0..4 {
-                                            ui.selectable_value(
-                                                &mut obj.data.palette_index,
-                                                palette,
-                                                format!("OBJ {palette}"),
-                                            );
-                                        }
-                                    });
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("X");
-                            });
-                            row.col(|ui| {
-                                ui.add(NumberEdit::new(&mut obj.x).range(-512..512));
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("Y");
-                            });
-                            row.col(|ui| {
-                                ui.add(NumberEdit::new(&mut obj.y).range(-8..=224));
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("Parallax");
-                            });
-                            row.col(|ui| {
-                                ui.add(NumberEdit::new(&mut obj.parallax).range(-512..512));
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.add(Checkbox::new(&mut obj.data.hflip, "H-flip"));
-                            });
-                            row.col(|ui| {
-                                ui.add(Checkbox::new(&mut obj.data.vflip, "V-flip"));
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.add(Checkbox::new(&mut obj.lon, "Left"));
-                            });
-                            row.col(|ui| {
-                                ui.add(Checkbox::new(&mut obj.ron, "Right"));
-                            });
-                        });
-                    });
-                if obj.update(&mut object) {
-                    let address = 0x3e000 + self.index * 8;
-                    self.memory.write(self.sim_id, address as u32, &object);
-                }
-            });
-            ui.section("Display", |ui| {
-                ui.horizontal(|ui| {
-                    ui.label("Scale");
-                    ui.spacing_mut().slider_width = ui.available_width();
-                    let slider = Slider::new(&mut self.scale, 1.0..=10.0)
-                        .step_by(1.0)
-                        .show_value(false);
-                    ui.add(slider);
-                });
-                ui.checkbox(&mut self.generic_palette, "Generic palette");
-            });
-        });
-        self.params.write(ObjectParams {
-            index: self.index,
-            generic_palette: self.generic_palette,
-            ..*self.params
-        });
-    }
-
-    fn show_object(&mut self, ui: &mut Ui) {
-        let image = Image::new("vip://full")
-            .fit_to_original_size(self.scale)
-            .texture_options(TextureOptions::NEAREST);
-        ui.add(image);
-    }
-}
-
-impl AppWindow for ObjectWindow {
-    fn viewport_id(&self) -> egui::ViewportId {
-        ViewportId::from_hash_of(format!("object-{}", self.sim_id))
-    }
-
-    fn sim_id(&self) -> SimId {
-        self.sim_id
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title(format!("Object Data ({})", self.sim_id))
-            .with_inner_size((640.0, 500.0))
-    }
-
-    fn on_init(&mut self, ctx: &Context, _render_state: &egui_wgpu::RenderState) {
-        ctx.add_texture_loader(self.loader.clone());
-    }
-
-    fn show(&mut self, ctx: &Context) {
-        CentralPanel::default().show(ctx, |ui| {
-            ui.horizontal_top(|ui| {
-                StripBuilder::new(ui)
-                    .size(Size::relative(0.3).at_most(200.0))
-                    .size(Size::remainder())
-                    .horizontal(|mut strip| {
-                        strip.cell(|ui| {
-                            ScrollArea::vertical().show(ui, |ui| self.show_form(ui));
-                        });
-                        strip.cell(|ui| {
-                            ScrollArea::both().show(ui, |ui| self.show_object(ui));
-                        });
-                    });
-            });
-        });
-    }
-}
-
-#[derive(Clone, PartialEq, Eq)]
-struct ObjectParams {
-    index: usize,
-    generic_palette: bool,
-    left_color: Color32,
-    right_color: Color32,
-}
-
-enum Eye {
-    Left,
-    Right,
-}
-
-struct ObjectRenderer {
-    chardata: MemoryView,
-    objects: MemoryView,
-    brightness: MemoryView,
-    palettes: MemoryView,
-}
-
-impl ObjectRenderer {
-    pub fn new(sim_id: SimId, memory: &MemoryClient) -> Self {
-        Self {
-            chardata: memory.watch(sim_id, 0x00078000, 0x8000),
-            objects: memory.watch(sim_id, 0x0003e000, 0x2000),
-            brightness: memory.watch(sim_id, 0x0005f824, 8),
-            palettes: memory.watch(sim_id, 0x0005f860, 16),
-        }
-    }
-
-    fn render_object(
-        &self,
-        image: &mut ImageBuffer,
-        params: &ObjectParams,
-        use_pos: bool,
-        eye: Eye,
-    ) {
-        let chardata = self.chardata.borrow();
-        let objects = self.objects.borrow();
-        let brightness = self.brightness.borrow();
-        let palettes = self.palettes.borrow();
-
-        let object: [u16; 4] = objects.read(params.index);
-        let obj = Object::parse(object);
-
-        if match eye {
-            Eye::Left => !obj.lon,
-            Eye::Right => !obj.ron,
-        } {
-            return;
-        }
-
-        let brts = brightness.read::<[u8; 8]>(0);
-        let (x, y) = if use_pos {
-            let x = match eye {
-                Eye::Left => obj.x - obj.parallax,
-                Eye::Right => obj.x + obj.parallax,
-            };
-            (x, obj.y)
-        } else {
-            (0, 0)
-        };
-
-        let color = match eye {
-            Eye::Left => params.left_color,
-            Eye::Right => params.right_color,
-        };
-
-        let char = chardata.read::<[u16; 8]>(obj.data.char_index);
-        let palette = if params.generic_palette {
-            utils::generic_palette(color)
-        } else {
-            utils::palette_colors(palettes.read(8 + obj.data.palette_index * 2), &brts, color)
-        };
-
-        for row in 0..8 {
-            let real_y = y + row as i16;
-            if !(0..224).contains(&real_y) {
-                continue;
-            }
-            for (col, pixel) in
-                utils::read_char_row(&char, obj.data.hflip, obj.data.vflip, row).enumerate()
-            {
-                let real_x = x + col as i16;
-                if !(0..384).contains(&real_x) {
-                    continue;
-                }
-                image.add((real_x as usize, real_y as usize), palette[pixel as usize]);
-            }
-        }
-    }
-}
-
-impl ImageRenderer<2> for ObjectRenderer {
-    type Params = ObjectParams;
-
-    fn sizes(&self) -> [[usize; 2]; 2] {
-        [[8, 8], [384, 224]]
-    }
-
-    fn render(&mut self, params: &Self::Params, images: &mut [ImageBuffer; 2]) {
-        images[0].clear();
-        self.render_object(&mut images[0], params, false, Eye::Left);
-        self.render_object(&mut images[0], params, false, Eye::Right);
-        images[1].clear();
-        self.render_object(&mut images[1], params, true, Eye::Left);
-        self.render_object(&mut images[1], params, true, Eye::Right);
-    }
-}

src/window/vip/registers.rs

@@ -1,819 +0,0 @@
-use std::sync::Arc;
-
-use egui::{
-    Align, Button, CentralPanel, Checkbox, Color32, Context, Direction, Label, Layout, ScrollArea,
-    TextEdit, Ui, ViewportBuilder, ViewportId,
-};
-use egui_extras::{Column, Size, StripBuilder, TableBuilder};
-
-use crate::{
-    emulator::SimId,
-    memory::{MemoryClient, MemoryRef, MemoryValue, MemoryView},
-    window::{
-        AppWindow,
-        utils::{NumberEdit, UiExt},
-    },
-};
-
-use super::utils;
-
-pub struct RegisterWindow {
-    sim_id: SimId,
-    memory: Arc<MemoryClient>,
-    registers: MemoryView,
-}
-
-impl RegisterWindow {
-    pub fn new(sim_id: SimId, memory: &Arc<MemoryClient>) -> Self {
-        Self {
-            sim_id,
-            memory: memory.clone(),
-            registers: memory.watch(sim_id, 0x0005f800, 0x72),
-        }
-    }
-
-    fn show_interrupts(&mut self, ui: &mut Ui) {
-        let row_height = self.row_height(ui);
-        let [mut raw_intpnd, mut raw_intenb] = self.read_address(0x0005f800);
-        let mut intenb = InterruptReg::parse(raw_intenb);
-        let mut intpnd = InterruptReg::parse(raw_intpnd);
-        ui.section("Interrupt", |ui| {
-            let width = ui.available_width();
-            let xspace = ui.spacing().item_spacing.x;
-            ui.with_layout(Layout::top_down_justified(Align::Center), |ui| {
-                TableBuilder::new(ui)
-                    .id_salt("raw_values")
-                    .columns(Column::exact(width * 0.5 - xspace), 2)
-                    .cell_layout(Layout::left_to_right(Align::Max))
-                    .body(|mut body| {
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("INTENB");
-                            });
-                            row.col(|ui| {
-                                let mut text = format!("{raw_intenb:04x}");
-                                ui.add_sized(
-                                    ui.available_size(),
-                                    TextEdit::singleline(&mut text).horizontal_align(Align::Max),
-                                );
-                            });
-                        });
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label("INTPND");
-                            });
-                            row.col(|ui| {
-                                let mut text = format!("{raw_intpnd:04x}");
-                                ui.add_enabled(
-                                    false,
-                                    TextEdit::singleline(&mut text).horizontal_align(Align::Max),
-                                );
-                            });
-                        });
-                    });
-                ui.add_space(8.0);
-                TableBuilder::new(ui)
-                    .id_salt("flags")
-                    .column(Column::exact(width * 0.5 - xspace))
-                    .columns(Column::exact(width * 0.25 - xspace), 2)
-                    .cell_layout(Layout::left_to_right(Align::Center).with_main_align(Align::RIGHT))
-                    .body(|mut body| {
-                        body.row(row_height, |mut row| {
-                            row.col(|_ui| {});
-                            row.col(|ui| {
-                                ui.add_sized(ui.available_size(), Label::new("ENB"));
-                            });
-                            row.col(|ui| {
-                                ui.add_sized(ui.available_size(), Label::new("PND"));
-                            });
-                        });
-                        let mut add_row = |label: &str, enb: &mut bool, pnd: &mut bool| {
-                            body.row(row_height, |mut row| {
-                                row.col(|ui| {
-                                    ui.label(label);
-                                });
-                                row.col(|ui| {
-                                    let space =
-                                        (ui.available_width() - ui.spacing().icon_width) / 2.0;
-                                    ui.add_space(space);
-                                    ui.checkbox(enb, "");
-                                });
-                                row.col(|ui| {
-                                    let space =
-                                        (ui.available_width() - ui.spacing().icon_width) / 2.0;
-                                    ui.add_space(space);
-                                    ui.checkbox(pnd, "");
-                                });
-                            });
-                        };
-                        add_row("TIMEERR", &mut intenb.timeerr, &mut intpnd.timeerr);
-                        add_row("XPEND", &mut intenb.xpend, &mut intpnd.xpend);
-                        add_row("SBHIT", &mut intenb.sbhit, &mut intpnd.sbhit);
-                        add_row("FRAMESTART", &mut intenb.framestart, &mut intpnd.framestart);
-                        add_row("GAMESTART", &mut intenb.gamestart, &mut intpnd.gamestart);
-                        add_row("RFBEND", &mut intenb.rfbend, &mut intpnd.rfbend);
-                        add_row("LFBEND", &mut intenb.lfbend, &mut intpnd.lfbend);
-                        add_row("SCANERR", &mut intenb.scanerr, &mut intpnd.scanerr);
-                    });
-            });
-            ui.allocate_space(ui.available_size());
-        });
-        if intpnd.update(&mut raw_intpnd) {
-            self.memory.write(self.sim_id, 0x0005f800, &raw_intpnd);
-        }
-        if intenb.update(&mut raw_intenb) {
-            self.memory.write(self.sim_id, 0x0005f802, &raw_intenb);
-        }
-    }
-
-    fn show_display_status(&mut self, ui: &mut Ui) {
-        let row_height = self.row_height(ui);
-        let mut raw_dpstts = self.read_address(0x0005f820);
-        let mut dpstts = DisplayReg::parse(raw_dpstts);
-        ui.section("Display", |ui| {
-            let width = ui.available_width();
-            TableBuilder::new(ui)
-                .column(Column::exact(width * 0.5))
-                .column(Column::exact(width * 0.5))
-                .cell_layout(Layout::left_to_right(Align::Max))
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("DPSTTS");
-                        });
-                        row.col(|ui| {
-                            let mut value_str = format!("{raw_dpstts:04x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut value_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_enabled(true, Checkbox::new(&mut dpstts.lock, "LOCK"));
-                        });
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut dpstts.r1bsy, "R1BSY"));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_enabled(true, Checkbox::new(&mut dpstts.synce, "SYNCE"));
-                        });
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut dpstts.l1bsy, "L1BSY"));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_enabled(true, Checkbox::new(&mut dpstts.re, "RE"));
-                        });
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut dpstts.r0bsy, "R0BSY"));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut dpstts.fclk, "FCLK"));
-                        });
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut dpstts.l0bsy, "L0BSY"));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut dpstts.scanrdy, "SCANRDY"));
-                        });
-                        row.col(|ui| {
-                            ui.add_enabled(true, Checkbox::new(&mut dpstts.disp, "DISP"));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|_ui| {});
-                        row.col(|ui| {
-                            if ui
-                                .add(Button::new("DPRST").min_size(ui.available_size()))
-                                .clicked()
-                            {
-                                dpstts.dprst = true;
-                            }
-                        });
-                    });
-                });
-            ui.allocate_space(ui.available_size());
-        });
-        if dpstts.update(&mut raw_dpstts) {
-            self.memory.write(self.sim_id, 0x0005f822, &raw_dpstts);
-        }
-    }
-
-    fn show_drawing_status(&mut self, ui: &mut Ui) {
-        let row_height = self.row_height(ui);
-        let [mut raw_xpstts, raw_xpctrl] = self.read_address(0x0005f840);
-        let mut xpstts = DrawingReg::parse(raw_xpstts);
-        ui.section("Drawing", |ui| {
-            let width = ui.available_width();
-            TableBuilder::new(ui)
-                .column(Column::exact(width * 0.5))
-                .column(Column::exact(width * 0.5))
-                .cell_layout(Layout::left_to_right(Align::Max))
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("XPCTRL");
-                        });
-                        row.col(|ui| {
-                            let mut value_str = format!("{raw_xpctrl:04x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut value_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("XPSTTS");
-                        });
-                        row.col(|ui| {
-                            let mut value_str = format!("{raw_xpstts:04x}");
-                            ui.add_enabled(
-                                false,
-                                TextEdit::singleline(&mut value_str).horizontal_align(Align::Max),
-                            );
-                        });
-                    });
-                    /*
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("SBCMP");
-                        });
-                        row.col(|ui| {
-                            let old_value = xpctrl.sbcmp;
-                            ui.add_enabled(true, NumberEdit::new(&mut xpctrl.sbcmp).range(0..32));
-                            cmp_changed = xpctrl.sbcmp != old_value;
-                        });
-                    });
-                     */
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("SBCOUNT");
-                        });
-                        row.col(|ui| {
-                            ui.add_enabled(
-                                false,
-                                NumberEdit::new(&mut xpstts.sbcount)
-                                    .arrows(false)
-                                    .range(0..32),
-                            );
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut xpstts.sbout, "SBOUT"));
-                        });
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut xpstts.f1bsy, "F1BSY"));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut xpstts.f0bsy, "F0BSY"));
-                        });
-                        row.col(|ui| {
-                            ui.add_enabled(false, Checkbox::new(&mut xpstts.overtime, "OVERTIME"));
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.add_enabled(true, Checkbox::new(&mut xpstts.xpen, "XPEN"));
-                        });
-                        row.col(|ui| {
-                            if ui
-                                .add(Button::new("XPRST").min_size(ui.available_size()))
-                                .clicked()
-                            {
-                                xpstts.xprst = true;
-                            }
-                        });
-                    });
-                });
-            ui.allocate_space(ui.available_size());
-        });
-        if xpstts.update(&mut raw_xpstts) {
-            xpstts.update(&mut raw_xpstts);
-            self.memory.write(self.sim_id, 0x0005f842, &raw_xpstts);
-        }
-    }
-
-    fn show_colors(&mut self, ui: &mut Ui) {
-        let row_height = self.row_height(ui);
-        let registers = self.registers.borrow();
-        ui.section("Colors", |ui| {
-            let width = ui.available_width();
-            let xspace = ui.spacing().item_spacing.x;
-            TableBuilder::new(ui)
-                .column(Column::exact(width * 0.2 - xspace))
-                .columns(Column::exact(width * 0.20 - xspace), 4)
-                .cell_layout(Layout::left_to_right(Align::Max))
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|_ui| {});
-                        row.col(|_ui| {});
-                        row.col(|ui| {
-                            ui.with_layout(
-                                Layout::centered_and_justified(Direction::LeftToRight),
-                                |ui| ui.label("1"),
-                            );
-                        });
-                        row.col(|ui| {
-                            ui.with_layout(
-                                Layout::centered_and_justified(Direction::LeftToRight),
-                                |ui| ui.label("2"),
-                            );
-                        });
-                        row.col(|ui| {
-                            ui.with_layout(
-                                Layout::centered_and_justified(Direction::LeftToRight),
-                                |ui| ui.label("3"),
-                            );
-                        });
-                    });
-                    let mut brts: [u16; 3] = [
-                        read_address(&registers, 0x0005f824),
-                        read_address(&registers, 0x0005f826),
-                        read_address(&registers, 0x0005f828),
-                    ];
-                    body.row(row_height, |mut row| {
-                        let mut stale = false;
-                        row.col(|ui| {
-                            ui.label("BRT");
-                        });
-                        row.col(|_ui| {});
-                        for brt in brts.iter_mut() {
-                            row.col(|ui| {
-                                if ui
-                                    .add(NumberEdit::new(brt).range(0..256).arrows(false).hex(true))
-                                    .changed()
-                                {
-                                    stale = true;
-                                }
-                            });
-                        }
-                        if stale {
-                            self.memory.write(self.sim_id, 0x0005f824, &brts);
-                        }
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|_ui| {});
-                        for shade in utils::parse_brts(&brts, Color32::RED) {
-                            row.col(|ui| {
-                                ui.painter().rect_filled(
-                                    ui.available_rect_before_wrap(),
-                                    0.0,
-                                    shade,
-                                );
-                            });
-                        }
-                    });
-                    let mut palettes = read_address::<[u16; 8]>(&registers, 0x0005f860);
-                    let mut add_row = |name: &str, address: u32, value: &mut u16| {
-                        let mut c1 = (*value >> 2) & 0x03;
-                        let mut c2 = (*value >> 4) & 0x03;
-                        let mut c3 = (*value >> 6) & 0x03;
-                        let mut stale = false;
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label(name);
-                            });
-                            row.col(|ui| {
-                                if ui
-                                    .add(
-                                        NumberEdit::new(value)
-                                            .range(0..256)
-                                            .desired_width(width * 0.2)
-                                            .arrows(false)
-                                            .hex(true),
-                                    )
-                                    .changed()
-                                {
-                                    stale = true;
-                                };
-                            });
-                            row.col(|ui| {
-                                if ui
-                                    .add(
-                                        NumberEdit::new(&mut c1)
-                                            .range(0..4)
-                                            .desired_width(ui.available_width() - xspace),
-                                    )
-                                    .changed()
-                                {
-                                    *value = (*value & 0xfff3) | (c1 << 2);
-                                    stale = true;
-                                }
-                            });
-                            row.col(|ui| {
-                                if ui
-                                    .add(
-                                        NumberEdit::new(&mut c2)
-                                            .range(0..4)
-                                            .desired_width(ui.available_width() - xspace),
-                                    )
-                                    .changed()
-                                {
-                                    *value = (*value & 0xffcf) | (c2 << 4);
-                                    stale = true;
-                                }
-                            });
-                            row.col(|ui| {
-                                if ui
-                                    .add(
-                                        NumberEdit::new(&mut c3)
-                                            .range(0..4)
-                                            .desired_width(ui.available_width() - xspace),
-                                    )
-                                    .changed()
-                                {
-                                    *value = (*value & 0xff3f) | (c3 << 6);
-                                    stale = true;
-                                }
-                            });
-                        });
-                        if stale {
-                            self.memory.write(self.sim_id, address, value);
-                        }
-                    };
-
-                    add_row("GPLT0", 0x0005f860, &mut palettes[0]);
-                    add_row("GPLT1", 0x0005f862, &mut palettes[1]);
-                    add_row("GPLT2", 0x0005f864, &mut palettes[2]);
-                    add_row("GPLT3", 0x0005f866, &mut palettes[3]);
-                    add_row("JPLT0", 0x0005f868, &mut palettes[4]);
-                    add_row("JPLT1", 0x0005f86a, &mut palettes[5]);
-                    add_row("JPLT2", 0x0005f86c, &mut palettes[6]);
-                    add_row("JPLT3", 0x0005f86e, &mut palettes[7]);
-
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("BKCOL");
-                        });
-                        row.col(|ui| {
-                            let mut bkcol: u16 = read_address(&registers, 0x0005f870);
-                            if ui
-                                .add(
-                                    NumberEdit::new(&mut bkcol)
-                                        .range(0..4)
-                                        .desired_width(ui.available_width() - xspace),
-                                )
-                                .changed()
-                            {
-                                self.memory.write(self.sim_id, 0x0005f870, &bkcol);
-                            }
-                        });
-                        row.col(|_ui| {});
-                        row.col(|ui| {
-                            ui.label("REST");
-                        });
-                        row.col(|ui| {
-                            let mut rest: u16 = read_address(&registers, 0x0005f82a);
-                            if ui
-                                .add(
-                                    NumberEdit::new(&mut rest)
-                                        .range(0..256)
-                                        .arrows(false)
-                                        .hex(true),
-                                )
-                                .changed()
-                            {
-                                self.memory.write(self.sim_id, 0x0005f82a, &rest);
-                            }
-                        });
-                    });
-                });
-
-            ui.allocate_space(ui.available_size_before_wrap());
-        });
-    }
-
-    fn show_objects(&mut self, ui: &mut Ui) {
-        let row_height = self.row_height(ui);
-        ui.section("Objects", |ui| {
-            let width = ui.available_width();
-            let xspace = ui.spacing().item_spacing.x;
-            TableBuilder::new(ui)
-                .column(Column::exact(width * 0.3 - xspace))
-                .column(Column::exact(width * 0.3 - xspace))
-                .column(Column::exact(width * 0.4 - xspace))
-                .cell_layout(Layout::left_to_right(Align::Center).with_main_align(Align::RIGHT))
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|_ui| {});
-                        row.col(|ui| {
-                            ui.add_sized(ui.available_size(), Label::new("Start"));
-                        });
-                        row.col(|ui| {
-                            ui.add_sized(ui.available_size(), Label::new("End"));
-                        });
-                    });
-                    let mut spts = self.read_address::<[u16; 4]>(0x0005f848);
-                    let prevs = std::iter::once(0u16).chain(spts.map(|i| (i + 1) & 0x03ff));
-                    let mut changed = false;
-                    for (index, (spt, prev)) in spts.iter_mut().zip(prevs).enumerate() {
-                        body.row(row_height, |mut row| {
-                            row.col(|ui| {
-                                ui.label(format!("SPT{index}"));
-                            });
-                            row.col(|ui| {
-                                ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
-                                    ui.label(prev.to_string());
-                                });
-                            });
-                            row.col(|ui| {
-                                if ui.add(NumberEdit::new(spt).range(0..1024)).changed() {
-                                    changed = true;
-                                }
-                            });
-                        });
-                    }
-                    if changed {
-                        self.memory.write(self.sim_id, 0x0005f848, &spts);
-                    }
-                });
-            ui.allocate_space(ui.available_size_before_wrap());
-        });
-    }
-
-    fn show_misc(&mut self, ui: &mut Ui) {
-        let row_height = self.row_height(ui);
-        let registers = self.registers.borrow();
-        ui.section("Misc.", |ui| {
-            let width = ui.available_width();
-            let xspace = ui.spacing().item_spacing.x;
-            TableBuilder::new(ui)
-                .column(Column::exact(width * 0.5 - xspace))
-                .column(Column::exact(width * 0.5 - xspace))
-                .cell_layout(Layout::left_to_right(Align::Center).with_main_align(Align::RIGHT))
-                .body(|mut body| {
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("FRMCYC");
-                        });
-                        row.col(|ui| {
-                            let mut frmcyc = read_address::<u16>(&registers, 0x0005f82e);
-                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
-                                if ui.add(NumberEdit::new(&mut frmcyc).range(0..32)).changed() {
-                                    self.memory.write(self.sim_id, 0x0005f82e, &frmcyc);
-                                }
-                            });
-                        });
-                    });
-                    let mut cta = read_address::<u16>(&registers, 0x0005f830);
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("CTA");
-                        });
-                        row.col(|ui| {
-                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
-                                ui.add_enabled(
-                                    false,
-                                    NumberEdit::new(&mut cta).arrows(false).hex(true),
-                                );
-                            });
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("CTA_L");
-                        });
-                        row.col(|ui| {
-                            let mut cta_l = cta & 0xff;
-                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
-                                ui.add_enabled(
-                                    false,
-                                    NumberEdit::new(&mut cta_l).arrows(false).hex(true),
-                                );
-                            });
-                        });
-                    });
-                    body.row(row_height, |mut row| {
-                        row.col(|ui| {
-                            ui.label("CTA_R");
-                        });
-                        row.col(|ui| {
-                            let mut cta_r = (cta >> 8) & 0xff;
-                            ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
-                                ui.add_enabled(
-                                    false,
-                                    NumberEdit::new(&mut cta_r).arrows(false).hex(true),
-                                );
-                            });
-                        });
-                    });
-                });
-            ui.allocate_space(ui.available_size_before_wrap());
-        });
-    }
-
-    fn row_height(&self, ui: &mut Ui) -> f32 {
-        ui.spacing().interact_size.y + ui.style().visuals.selection.stroke.width
-    }
-
-    fn read_address<T: MemoryValue>(&self, address: usize) -> T {
-        read_address(&self.registers.borrow(), address)
-    }
-}
-
-fn read_address<T: MemoryValue>(registers: &MemoryRef, address: usize) -> T {
-    let index = (address - 0x0005f800) / size_of::<T>();
-    registers.read(index)
-}
-
-impl AppWindow for RegisterWindow {
-    fn viewport_id(&self) -> ViewportId {
-        ViewportId::from_hash_of(format!("registers-{}", self.sim_id))
-    }
-
-    fn sim_id(&self) -> SimId {
-        self.sim_id
-    }
-
-    fn initial_viewport(&self) -> ViewportBuilder {
-        ViewportBuilder::default()
-            .with_title(format!("Registers ({})", self.sim_id))
-            .with_inner_size((800.0, 480.0))
-    }
-
-    fn show(&mut self, ctx: &Context) {
-        CentralPanel::default().show(ctx, |ui| {
-            ScrollArea::vertical().show(ui, |ui| {
-                ui.horizontal_top(|ui| {
-                    let width = ui.available_width();
-                    let xspace = ui.spacing().item_spacing.x;
-                    StripBuilder::new(ui)
-                        .size(Size::exact(width * 0.25 - xspace))
-                        .size(Size::exact(width * 0.225 - xspace))
-                        .size(Size::exact(width * 0.325 - xspace))
-                        .size(Size::exact(width * 0.2 - xspace))
-                        .horizontal(|mut strip| {
-                            strip.cell(|ui| {
-                                self.show_interrupts(ui);
-                            });
-                            strip.strip(|nested| {
-                                nested.sizes(Size::remainder(), 2).vertical(|mut strip| {
-                                    strip.cell(|ui| {
-                                        self.show_display_status(ui);
-                                    });
-                                    strip.cell(|ui| {
-                                        self.show_drawing_status(ui);
-                                    });
-                                });
-                            });
-                            strip.cell(|ui| {
-                                self.show_colors(ui);
-                            });
-                            strip.strip(|nested| {
-                                nested.sizes(Size::remainder(), 2).vertical(|mut strip| {
-                                    strip.cell(|ui| {
-                                        self.show_objects(ui);
-                                    });
-                                    strip.cell(|ui| {
-                                        self.show_misc(ui);
-                                    });
-                                });
-                            });
-                        });
-                });
-            });
-        });
-    }
-}
-
-struct InterruptReg {
-    timeerr: bool,
-    xpend: bool,
-    sbhit: bool,
-    framestart: bool,
-    gamestart: bool,
-    rfbend: bool,
-    lfbend: bool,
-    scanerr: bool,
-}
-
-impl InterruptReg {
-    fn parse(value: u16) -> Self {
-        Self {
-            timeerr: value & 0x8000 != 0,
-            xpend: value & 0x4000 != 0,
-            sbhit: value & 0x2000 != 0,
-            framestart: value & 0x0010 != 0,
-            gamestart: value & 0x0008 != 0,
-            rfbend: value & 0x0004 != 0,
-            lfbend: value & 0x0002 != 0,
-            scanerr: value & 0x0001 != 0,
-        }
-    }
-
-    fn update(&self, value: &mut u16) -> bool {
-        let new_value = (*value & 0x1fe0)
-            | if self.timeerr { 0x8000 } else { 0x0000 }
-            | if self.xpend { 0x4000 } else { 0x0000 }
-            | if self.sbhit { 0x2000 } else { 0x0000 }
-            | if self.framestart { 0x0010 } else { 0x0000 }
-            | if self.gamestart { 0x0008 } else { 0x0000 }
-            | if self.rfbend { 0x0004 } else { 0x0000 }
-            | if self.lfbend { 0x0002 } else { 0x0000 }
-            | if self.scanerr { 0x0001 } else { 0x0000 };
-        let changed = *value != new_value;
-        *value = new_value;
-        changed
-    }
-}
-
-struct DisplayReg {
-    lock: bool,
-    synce: bool,
-    re: bool,
-    fclk: bool,
-    scanrdy: bool,
-    r1bsy: bool,
-    l1bsy: bool,
-    r0bsy: bool,
-    l0bsy: bool,
-    disp: bool,
-    dprst: bool,
-}
-
-impl DisplayReg {
-    fn parse(value: u16) -> Self {
-        Self {
-            lock: value & 0x0400 != 0,
-            synce: value & 0x0200 != 0,
-            re: value & 0x0100 != 0,
-            fclk: value & 0x0080 != 0,
-            scanrdy: value & 0x0040 != 0,
-            r1bsy: value & 0x0020 != 0,
-            l1bsy: value & 0x0010 != 0,
-            r0bsy: value & 0x0008 != 0,
-            l0bsy: value & 0x0004 != 0,
-            disp: value & 0x0002 != 0,
-            dprst: value & 0x0001 != 0,
-        }
-    }
-
-    fn update(&self, value: &mut u16) -> bool {
-        let new_value = (*value & 0xf800)
-            | if self.lock { 0x0400 } else { 0x0000 }
-            | if self.synce { 0x0200 } else { 0x0000 }
-            | if self.re { 0x0100 } else { 0x0000 }
-            | if self.fclk { 0x0080 } else { 0x0000 }
-            | if self.scanrdy { 0x0040 } else { 0x0000 }
-            | if self.r1bsy { 0x0020 } else { 0x0000 }
-            | if self.l1bsy { 0x0010 } else { 0x0000 }
-            | if self.r0bsy { 0x0008 } else { 0x0000 }
-            | if self.l0bsy { 0x0004 } else { 0x0000 }
-            | if self.disp { 0x0002 } else { 0x0000 }
-            | if self.dprst { 0x0001 } else { 0x0000 };
-        let changed = *value != new_value;
-        *value = new_value;
-        changed
-    }
-}
-
-struct DrawingReg {
-    sbout: bool,
-    sbcount: u8,
-    overtime: bool,
-    f1bsy: bool,
-    f0bsy: bool,
-    xpen: bool,
-    xprst: bool,
-}
-
-impl DrawingReg {
-    fn parse(value: u16) -> Self {
-        Self {
-            sbout: value & 0x8000 != 0,
-            sbcount: (value >> 8) as u8 & 0x1f,
-            overtime: value & 0x0010 != 0,
-            f1bsy: value & 0x0008 != 0,
-            f0bsy: value & 0x0004 != 0,
-            xpen: value & 0x0002 != 0,
-            xprst: value & 0x0001 != 0,
-        }
-    }
-
-    fn update(&self, value: &mut u16) -> bool {
-        let new_value = (*value & 0x60e0)
-            | if self.sbout { 0x8000 } else { 0x0000 }
-            | (((self.sbcount & 0x1f) as u16) << 8)
-            | if self.overtime { 0x0010 } else { 0x0000 }
-            | if self.f1bsy { 0x0008 } else { 0x0000 }
-            | if self.f0bsy { 0x0004 } else { 0x0000 }
-            | if self.xpen { 0x0002 } else { 0x0000 }
-            | if self.xprst { 0x0001 } else { 0x0000 };
-        let changed = *value != new_value;
-        *value = new_value;
-        changed
-    }
-}

src/window/vip/utils.rs

@@ -1,251 +0,0 @@
-use egui::{Color32, Image, ImageSource, Response, Sense, TextureOptions, Ui, Widget};
-
-pub const GENERIC_PALETTE: [u8; 4] = [0, 32, 64, 128];
-
-pub fn shade(brt: u8, color: Color32) -> Color32 {
-    let corrected = if brt > 132 {
-        255.0
-    } else {
-        (brt as f32 * 255.0 / 133.0).round()
-    };
-    color.gamma_multiply(corrected / 255.0)
-}
-
-pub fn generic_palette(color: Color32) -> [Color32; 4] {
-    GENERIC_PALETTE.map(|brt| shade(brt, color))
-}
-
-pub const fn parse_palette(palette: u8) -> [u8; 4] {
-    [
-        0,
-        (palette >> 2) & 0x03,
-        (palette >> 4) & 0x03,
-        (palette >> 6) & 0x03,
-    ]
-}
-
-pub const fn parse_shades(brts: &[u8; 8]) -> [u8; 4] {
-    [
-        0,
-        brts[0],
-        brts[2],
-        brts[0].saturating_add(brts[2]).saturating_add(brts[4]),
-    ]
-}
-
-pub fn parse_brts(brts: &[u16; 3], color: Color32) -> [Color32; 4] {
-    [
-        Color32::BLACK,
-        shade(brts[0] as u8, color),
-        shade(brts[1] as u8, color),
-        shade((brts[0] + brts[1] + brts[2]) as u8, color),
-    ]
-}
-
-pub fn palette_colors(palette: u8, brts: &[u8; 8], color: Color32) -> [Color32; 4] {
-    let colors = parse_shades(brts).map(|s| shade(s, color));
-    parse_palette(palette).map(|p| colors[p as usize])
-}
-
-pub struct Object {
-    pub x: i16,
-    pub lon: bool,
-    pub ron: bool,
-    pub parallax: i16,
-    pub y: i16,
-    pub data: CellData,
-}
-
-impl Object {
-    pub fn parse(object: [u16; 4]) -> Self {
-        let x = ((object[0] & 0x03ff) << 6 >> 6) as i16;
-        let parallax = ((object[1] & 0x03ff) << 6 >> 6) as i16;
-        let lon = object[1] & 0x8000 != 0;
-        let ron = object[1] & 0x4000 != 0;
-        let y = (object[2] & 0x00ff) as i16;
-        // Y is stored as the bottom 8 bits of an i16,
-        // so only sign extend if it's out of range.
-        let y = if y > 224 { y << 8 >> 8 } else { y };
-        let data = CellData::parse(object[3]);
-        Self {
-            x,
-            lon,
-            ron,
-            parallax,
-            y,
-            data,
-        }
-    }
-
-    pub fn update(&self, source: &mut [u16; 4]) -> bool {
-        let mut changed = false;
-
-        let new_x = (self.x as u16 & 0x03ff) | (source[0] & 0xfc00);
-        changed |= source[0] != new_x;
-        source[0] = new_x;
-
-        let new_p = if self.lon { 0x8000 } else { 0x0000 }
-            | if self.ron { 0x4000 } else { 0x0000 }
-            | (self.parallax as u16 & 0x3ff)
-            | (source[1] & 0x3c00);
-        changed |= source[1] != new_p;
-        source[1] = new_p;
-
-        let new_y = (self.y as u16 & 0x00ff) | (source[2] & 0xff00);
-        changed |= source[2] != new_y;
-        source[2] = new_y;
-
-        if self.data.update(&mut source[3]) {
-            changed = true;
-        }
-        changed
-    }
-}
-
-pub struct CellData {
-    pub palette_index: usize,
-    pub hflip: bool,
-    pub vflip: bool,
-    pub char_index: usize,
-}
-
-impl CellData {
-    pub fn parse(cell: u16) -> Self {
-        let char_index = (cell & 0x7ff) as usize;
-        let vflip = cell & 0x1000 != 0;
-        let hflip = cell & 0x2000 != 0;
-        let palette_index = (cell >> 14) as usize;
-        Self {
-            char_index,
-            vflip,
-            hflip,
-            palette_index,
-        }
-    }
-
-    pub fn update(&self, source: &mut u16) -> bool {
-        let new_value = ((self.palette_index as u16) << 14)
-            | if self.hflip { 0x2000 } else { 0x0000 }
-            | if self.vflip { 0x1000 } else { 0x0000 }
-            | (self.char_index as u16 & 0x07ff)
-            | (*source & 0x0800);
-        let changed = *source != new_value;
-        *source = new_value;
-        changed
-    }
-}
-
-pub fn read_char_row(
-    char: &[u16; 8],
-    hflip: bool,
-    vflip: bool,
-    row: usize,
-) -> impl Iterator<Item = u8> {
-    let pixels = if vflip { char[7 - row] } else { char[row] };
-    (0..16).step_by(2).map(move |i| {
-        let pixel = if hflip { 14 - i } else { i };
-        ((pixels >> pixel) & 0x3) as u8
-    })
-}
-
-pub fn read_char_pixel(char: &[u16; 8], hflip: bool, vflip: bool, row: usize, col: usize) -> u8 {
-    let pixels = if vflip { char[7 - row] } else { char[row] };
-    let pixel = if hflip { 7 - col } else { col } << 1;
-    ((pixels >> pixel) & 0x3) as u8
-}
-
-pub struct CharacterGrid<'a> {
-    source: ImageSource<'a>,
-    scale: f32,
-    show_grid: bool,
-    selected: Option<usize>,
-}
-
-impl<'a> CharacterGrid<'a> {
-    pub fn new(source: impl Into<ImageSource<'a>>) -> Self {
-        Self {
-            source: source.into(),
-            scale: 1.0,
-            show_grid: false,
-            selected: None,
-        }
-    }
-
-    pub fn with_scale(self, scale: f32) -> Self {
-        Self { scale, ..self }
-    }
-
-    pub fn with_grid(self, show_grid: bool) -> Self {
-        Self { show_grid, ..self }
-    }
-
-    pub fn with_selected(self, selected: usize) -> Self {
-        Self {
-            selected: Some(selected),
-            ..self
-        }
-    }
-
-    pub fn show(self, ui: &mut Ui) -> Option<usize> {
-        let start_pos = ui.cursor().min;
-        let cell_size = 8.0 * self.scale;
-
-        let res = self.ui(ui);
-
-        let grid_width_cells = ((res.rect.max.x - res.rect.min.x) / cell_size).round() as usize;
-
-        if res.clicked() {
-            let click_pos = res.interact_pointer_pos()?;
-            let grid_pos = (click_pos - start_pos) / cell_size;
-            Some((grid_pos.y as usize * grid_width_cells) + grid_pos.x as usize)
-        } else {
-            None
-        }
-    }
-}
-
-impl Widget for CharacterGrid<'_> {
-    fn ui(self, ui: &mut Ui) -> Response {
-        let image = Image::new(self.source)
-            .fit_to_original_size(self.scale)
-            .texture_options(TextureOptions::NEAREST)
-            .sense(Sense::click());
-        let res = ui.add(image);
-
-        let cell_size = 8.0 * self.scale;
-        let grid_width_cells = ((res.rect.max.x - res.rect.min.x) / cell_size).round() as usize;
-        let grid_height_cells = ((res.rect.max.y - res.rect.min.y) / cell_size).round() as usize;
-
-        let painter = ui.painter_at(res.rect);
-        if self.show_grid {
-            let stroke = ui.style().visuals.widgets.noninteractive.fg_stroke;
-            for x in (1..grid_width_cells).map(|i| (i as f32) * cell_size) {
-                let p1 = (res.rect.min.x + x, res.rect.min.y).into();
-                let p2 = (res.rect.min.x + x, res.rect.max.y).into();
-                painter.line_segment([p1, p2], stroke);
-            }
-            for y in (1..grid_height_cells).map(|i| (i as f32) * cell_size) {
-                let p1 = (res.rect.min.x, res.rect.min.y + y).into();
-                let p2 = (res.rect.max.x, res.rect.min.y + y).into();
-                painter.line_segment([p1, p2], stroke);
-            }
-        }
-        if let Some(selected) = self.selected {
-            let x1 = (selected % grid_width_cells) as f32 * cell_size;
-            let x2 = x1 + cell_size;
-            let y1 = (selected / grid_width_cells) as f32 * cell_size;
-            let y2 = y1 + cell_size;
-            painter.line(
-                vec![
-                    (res.rect.min + (x1, y1).into()),
-                    (res.rect.min + (x2, y1).into()),
-                    (res.rect.min + (x2, y2).into()),
-                    (res.rect.min + (x1, y2).into()),
-                    (res.rect.min + (x1, y1).into()),
-                ],
-                ui.style().visuals.widgets.active.fg_stroke,
-            );
-        }
-        res
-    }
-}