Fix debug UI not working at all

Reviewed-on: #58
Co-authored-by: Álex Román Núñez <eirexe@eirteam.moe>

.gitea/workflows/ci.yml

@@ -63,7 +63,6 @@ jobs:
             libxkbcommon-dev \
             libxkbcommon-x11-0 \
             mesa-vulkan-drivers \
-            blender \
             mold \
             pkg-config
 
@@ -130,22 +129,54 @@ jobs:
             libusb-1.0-0-dev \
             libwayland-dev \
             libx11-dev \
+            libxfixes3 \
+            libxi6 \
             libxkbcommon-dev \
             libxkbcommon-x11-0 \
+            blender \
             lld-19 \
             llvm-19 \
             mesa-vulkan-drivers \
             mold \
-            blender \
             pkg-config
           sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-19 100
           sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-19 100
           echo "/usr/lib/llvm-19/bin" >> "$GITHUB_PATH"
           rm -f "$HOME/.cache/cargo-xwin/clang-cl"
 
+      - name: Install pinned Blender
+        run: |
+          scripts/install-blender.sh "$RUNNER_TEMP/blender"
+          echo "BLENDER=$RUNNER_TEMP/blender/blender" >> "$GITHUB_ENV"
+
       - name: Preprocess assets
         run: cargo run --locked --bin process-assets --no-default-features --features debug_features -j 4
 
+      - name: Verify processed battlefield asset
+        run: |
+          python3 - <<'PY'
+          import json
+          import struct
+
+          path = "imported_assets/Default/stages/battlefield/bf2.blend"
+          with open(path, "rb") as asset:
+              header = asset.read(12)
+              if len(header) != 12:
+                  raise SystemExit(f"processed asset is truncated: {path}")
+              magic, version, length = struct.unpack("<4sII", header)
+              if magic != b"glTF" or version != 2 or length != asset.seek(0, 2):
+                  raise SystemExit(f"processed asset is not a valid GLB: {path}")
+              asset.seek(12)
+              json_length, chunk_type = struct.unpack("<II", asset.read(8))
+              if chunk_type != 0x4E4F534A:
+                  raise SystemExit(f"processed asset has no JSON chunk: {path}")
+              document = json.loads(asset.read(json_length))
+          meshes = document.get("meshes", [])
+          if not meshes:
+              raise SystemExit(f"processed asset contains no meshes: {path}")
+          print(f"{path}: {len(meshes)} meshes, {length} bytes")
+          PY
+
       - name: Build production binary
         run: cargo build --locked --profile production --no-default-features --features debug_features -j 4
 

assets/.lore/config.toml

@@ -1,15 +0,0 @@
-remote_url = "lore://lore.eirexe.moe"
-identity = "2"
-
-[store]
-max_capacity = 2000000
-eviction_delay = 30
-max_size = 10737418240
-compaction_delay = 50
-
-[file]
-direct_write = false
-flush_write = false
-
-[vfs]
-vfs_type = "None"

assets/catalog.bsn

@@ -1 +0,0 @@
-// no catalog entries

scripts/install-blender.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+version="5.2.2"
+sha256="84098912789dc450e95697c4184fb8a90acbe5111c2ba4aede3fecb57806a168"
+install_dir="${1:-${BLENDER_INSTALL_DIR:-${HOME}/.local/blender-${version}}}"
+
+if [[ "$(uname -s)" != Linux || "$(uname -m)" != x86_64 ]]; then
+    echo "error: this installer currently supports Linux x86_64 only" >&2
+    exit 1
+fi
+
+if [[ -x "$install_dir/blender" ]]; then
+    "$install_dir/blender" --version | head -n 1
+    exit 0
+fi
+
+mkdir -p "$(dirname "$install_dir")"
+tmp_dir="$(mktemp -d)"
+trap 'rm -rf "$tmp_dir"' EXIT
+
+archive="blender-${version}-linux-x64.tar.xz"
+url="https://download.blender.org/release/Blender5.2/${archive}"
+
+curl --fail --location --silent --show-error --output "$tmp_dir/$archive" "$url"
+printf '%s  %s\n' "$sha256" "$tmp_dir/$archive" | sha256sum --check --status
+tar --extract --xz --file "$tmp_dir/$archive" --directory "$tmp_dir"
+mv "$tmp_dir/blender-${version}-linux-x64" "$install_dir"
+
+"$install_dir/blender" --version | head -n 1

src/blend_asset.rs

@@ -84,10 +84,11 @@ impl AssetLoader for BlendSourceLoader {
             .arg(&blend_path)
             .arg("--python")
             .arg(&script)
-        .arg("--")
-        .arg(&output)
-        .arg(&actions_path)
-        .output()
+            .arg("--")
+            .arg(&output)
+            .arg(&actions_path)
+            .arg(&blend_path)
+            .output()
             .map_err(|error| io::Error::other(format!("failed to start Blender: {error}")))?;
         if !result.status.success() {
             return Err(io::Error::other(format!(
@@ -106,6 +107,7 @@ impl AssetLoader for BlendSourceLoader {
         let mut dependencies = manifest.dependencies;
         let document: serde_json::Value = serde_json::from_slice(&fs::read(&output)?)
             .map_err(|error| io::Error::new(io::ErrorKind::InvalidData, error))?;
+        validate_export(&document, &output)?;
         if let Some(images) = document.get("images").and_then(serde_json::Value::as_array) {
             for image in images {
                 if let Some(uri) = image.get("uri").and_then(serde_json::Value::as_str) {
@@ -142,6 +144,22 @@ impl AssetLoader for BlendSourceLoader {
     }
 }
 
+fn validate_export(document: &serde_json::Value, output: &Path) -> io::Result<()> {
+    for key in ["scenes", "nodes", "meshes"] {
+        let count = document
+            .get(key)
+            .and_then(serde_json::Value::as_array)
+            .map_or(0, Vec::len);
+        if count == 0 {
+            return Err(io::Error::new(
+                io::ErrorKind::InvalidData,
+                format!("Blender export {} contains no {key}", output.display()),
+            ));
+        }
+    }
+    Ok(())
+}
+
 async fn referenced_actions(
     load_context: &mut LoadContext<'_>,
     root: &Path,

src/blend_asset/export.py

@@ -7,6 +7,15 @@ import sys
 def main():
     output = sys.argv[sys.argv.index("--") + 1]
     actions_path = sys.argv[sys.argv.index("--") + 2]
+    source_path = sys.argv[sys.argv.index("--") + 3]
+    loaded_path = os.path.realpath(bpy.data.filepath)
+    expected_path = os.path.realpath(source_path)
+    if loaded_path != expected_path:
+        raise RuntimeError(
+            f"Blender loaded {loaded_path!r} instead of {expected_path!r}"
+        )
+    if not bpy.data.objects or not bpy.data.meshes:
+        raise RuntimeError("Blender loaded an empty scene")
     with open(actions_path) as file:
         actions_to_keep = set(json.load(file))
 

src/debug_tools.rs

@@ -3,11 +3,9 @@
 use std::{collections::HashMap, time::Duration};
 
 use bevy::{
-    input::InputSystems,
-    prelude::*,
-    settings::{ReflectSettingsGroup, SaveSettingsDeferred, SettingsGroup},
+    camera::{CameraOutputMode, visibility::RenderLayers}, input::InputSystems, prelude::*, render::render_resource::BlendState, settings::{ReflectSettingsGroup, SaveSettingsDeferred, SettingsGroup},
 };
-use bevy_egui::{EguiContexts, EguiPrimaryContextPass, egui};
+use bevy_egui::{EguiContexts, EguiGlobalSettings, EguiPrimaryContextPass, PrimaryEguiContext, egui};
 use bevy_ggrs::{RollbackFrameRate, RunGgrsSystems};
 use enum_cycling::EnumCycle;
 use enum_cycling_derive::EnumCycle;
@@ -397,6 +395,7 @@ impl Plugin for DebugToolsPlugin {
                     .before(RunGgrsSystems)
                     .run_if(in_state(AppState::InMatch)),
             )
+            .add_systems(Startup, spawn_egui_camera)
             .add_systems(PreUpdate, restore_frame_step_time.after(RunGgrsSystems))
             .add_systems(
                 Update,
@@ -408,6 +407,26 @@ impl Plugin for DebugToolsPlugin {
     }
 }
 
+pub fn spawn_egui_camera(mut commands: Commands, mut egui_global_settings: ResMut<EguiGlobalSettings>,) {
+    egui_global_settings.auto_create_primary_context = false;
+    commands.spawn((
+        // The `PrimaryEguiContext` component requires everything needed to render a primary context.
+        PrimaryEguiContext,
+        Camera2d,
+        // Setting RenderLayers to none makes sure we won't render anything apart from the UI.
+        RenderLayers::none(),
+        Camera {
+            order: 2,
+            output_mode: CameraOutputMode::Write {
+                blend_state: Some(BlendState::ALPHA_BLENDING),
+                clear_color: ClearColorConfig::None,
+            },
+            clear_color: ClearColorConfig::Custom(Color::NONE),
+            ..default()
+        },
+    ));
+}
+
 fn player_handles(players: &Query<&Player>) -> Vec<usize> {
     let mut handles = players
         .iter()

src/menus/character_select/mod.rs

@@ -1,19 +1,8 @@
 use bevy::{picking::pointer::PointerId, prelude::*};
 
 use crate::{
-    AppState,
-    fighter::manifest::{FighterManifest, FighterManifestRegistry},
-    game_settings::CommonAssets,
-    input::{LocalInputAssignments, LocalInputSource},
-    menus::{
-        MenuMarker,
-        button::FGUiButton,
-        character_select::{character_box::CharacterBox, token::CharacterSelectToken},
-        cursor::{FGMenuCursor, MenuCursorInputSource},
-        errors::MenuErrors::FighterManifestNotFound,
-        match_config::{MenuMatchConfig, MenuMatchPlayerSlot},
-        scaling, spawn_menu,
-        style::{FGUiButtonType, FGUiStyle},
+    AppState, fighter::manifest::{FighterManifest, FighterManifestRegistry}, game_settings::CommonAssets, input::{LocalInputAssignments, LocalInputSource}, menus::{
+        MenuCameraMarker, MenuMarker, button::FGUiButton, character_select::{character_box::CharacterBox, token::CharacterSelectToken}, cursor::{FGMenuCursor, MenuCursorInputSource}, errors::MenuErrors::FighterManifestNotFound, match_config::{MenuMatchConfig, MenuMatchPlayerSlot}, scaling, spawn_menu, style::{FGUiButtonType, FGUiStyle},
     },
 };
 
@@ -241,7 +230,7 @@ pub fn copy_cursor_transform_to_token(
     character_boxes: Query<(&CharacterBox, &ComputedNode, &UiGlobalTransform)>,
     match_config: Res<MenuMatchConfig>,
     cursors: Query<&UiGlobalTransform, With<FGMenuCursor>>,
-    cam: Single<&Camera>,
+    cam: Single<&Camera, With<MenuCameraMarker>>,
     ui_scale: Res<UiScale>,
 ) -> Result {
     let camera = cam.into_inner();

src/menus/cursor.rs

@@ -9,11 +9,8 @@ use bevy::{
 };
 
 use crate::{
-    input::{LocalInputAssignments, LocalInputSource},
-    menus::{
-        input::{MenuInput, MenuInputState},
-        scaling,
-        style::FGUiStyle,
+    input::{LocalInputAssignments, LocalInputSource}, menus::{
+        MenuCameraMarker, input::{MenuInput, MenuInputState}, scaling, style::FGUiStyle,
     },
 };
 
@@ -181,7 +178,7 @@ pub fn cursor_input(
 }
 
 pub fn update_cursor_transform(
-    camera: Single<&Camera>,
+    camera: Single<&Camera, With<MenuCameraMarker>>,
     query: Query<(&mut Node, &PointerLocation), With<FGMenuCursor>>,
     ui_scale: Res<UiScale>,
 ) {

src/menus/mod.rs

@@ -53,6 +53,7 @@ pub fn wrap_menu(menu: impl Scene) -> impl Scene {
                 #MenuCamera
                 Camera
                 Camera2d
+                MenuCameraMarker
             ),
             (
                 #MenuContainer
@@ -73,7 +74,6 @@ pub fn wrap_menu(menu: impl Scene) -> impl Scene {
 
 pub fn despawn_menu(
     existing_menu: Option<Single<Entity, With<MenuMarker>>>,
-    existing_menu_camera: Option<Single<Entity, With<MenuCameraMarker>>>,
     mut commands: Commands,
 ) {
     if let Some(entity) = existing_menu {
@@ -82,9 +82,6 @@ pub fn despawn_menu(
             .despawn();
     }
 
-    if let Some(menu_cam) = existing_menu_camera {
-        commands.entity(*menu_cam).despawn();
-    }
 }
 
 pub fn spawn_menu(