Fix issues #570, #575 (#576)

Author: John-Nagle

.github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
       - name: Set up Rust toolchain
         id: setup-rust
         run: |
-          rustup toolchain install 1.72 -c clippy -t ${{ matrix.target }}
+          rustup toolchain install 1.76 -c clippy -t ${{ matrix.target }}
 
       - name: Install cargo-nextest and cargo-llvm-cov
         uses: taiki-e/install-action@v2
@@ -56,21 +56,21 @@ jobs:
 
       - name: build
         run: |
-          cargo +1.72 build --target ${{ matrix.target }} --profile ci
+          cargo +1.76 build --target ${{ matrix.target }} --profile ci
         if: matrix.target != 'wasm32-unknown-unknown'
 
       - name: clippy (rend3-gltf featureless)
         run: |
-          cargo +1.72 clippy --target ${{ matrix.target }} --profile ci -p rend3-gltf --no-default-features
+          cargo +1.76 clippy --target ${{ matrix.target }} --profile ci -p rend3-gltf --no-default-features
 
       - name: clippy
         run: |
-          cargo +1.72 clippy --target ${{ matrix.target }} --profile ci
+          cargo +1.76 clippy --target ${{ matrix.target }} --profile ci
         if: matrix.target != 'wasm32-unknown-unknown'
 
       - name: doc
         run: |
-          cargo +1.72 doc --target ${{ matrix.target }} --profile ci --no-deps
+          cargo +1.76 doc --target ${{ matrix.target }} --profile ci --no-deps
         if: matrix.target != 'wasm32-unknown-unknown'
 
       - name: download test resources
@@ -80,7 +80,7 @@ jobs:
 
       - name: test
         run: |
-          cargo +1.72 nextest run --target ${{ matrix.target }} --cargo-profile ci --no-fail-fast
+          cargo +1.76 nextest run --target ${{ matrix.target }} --cargo-profile ci --no-fail-fast
         if: matrix.target != 'wasm32-unknown-unknown'
 
       - uses: actions/upload-artifact@v4
@@ -101,11 +101,11 @@ jobs:
       - name: Set up Rust toolchain
         id: setup-rust
         run: |
-          rustup toolchain install 1.72 -c rustfmt
+          rustup toolchain install 1.76 -c rustfmt
 
       - name: format
         run: |
-          cargo +1.72 fmt --check
+          cargo +1.76 fmt --check
 
   cargo-deny:
     runs-on: ubuntu-latest

rend3-framework/Cargo.toml

@@ -34,7 +34,6 @@ pollster = "0.3"
 console_error_panic_hook = "0.1"
 console_log = "1"
 js-sys = "0.3"
-reqwest = "0.11"
 once_cell = "1.8"
 wasm-bindgen = "0.2.87"
 wasm-bindgen-futures = "0.4"

rend3-framework/src/assets.rs

@@ -12,19 +12,6 @@ pub enum AssetError {
         #[source]
         error: std::io::Error,
     },
-    #[error("Could not read {path} from the network")]
-    #[cfg(target_arch = "wasm32")]
-    NetworkError {
-        path: SsoString,
-        #[source]
-        error: reqwest::Error,
-    },
-    #[error("Reading {path} from the network returned non-success status code {status}")]
-    #[cfg(target_arch = "wasm32")]
-    NetworkStatusError {
-        path: SsoString,
-        status: reqwest::StatusCode,
-    },
 }
 
 pub enum AssetPath<'a> {

rend3-framework/src/lib.rs

@@ -71,10 +71,14 @@ pub trait App<T: 'static = ()> {
         console_log::init().unwrap();
 
         #[cfg(all(not(target_arch = "wasm32"), not(target_os = "android")))]
-        env_logger::builder()
+        if let Err(e) = env_logger::builder()
             .filter_module("rend3", log::LevelFilter::Info)
             .parse_default_env()
-            .init();
+            .try_init()
+        {
+            eprintln!("Error registering logger from Rend3 framework: {:?}", e);
+            // probably ran two runs in sequence and initialized twice
+        };
     }
 
     fn register_panic_hook(&mut self) {
@@ -134,15 +138,27 @@ pub trait App<T: 'static = ()> {
         1.0
     }
 
+    /// Set up the rendering environment. Called once at startup.
     fn setup(&mut self, context: SetupContext<'_, T>) {
         let _ = context;
     }
 
+    /// Handle a non-redraw event.
     fn handle_event(&mut self, context: EventContext<'_, T>, event: Event<T>) {
         let _ = (context, event);
     }
 
+    /// Handle a redraw event.
     fn handle_redraw(&mut self, context: RedrawContext<'_, T>);
+
+    /// Called after each redraw for post-processing, if needed.
+    /// By default, this queues another redraw.
+    /// That behavior is not appropriate on some platforms.
+    /// Ref: Issue 570.
+    /// This gives the application the option of overriding that behavior.
+    fn handle_redraw_done(&mut self, window: &Window) {
+        window.request_redraw(); // just queue a redraw.
+    }
 }
 
 pub fn lock<T>(lock: &parking_lot::Mutex<T>) -> parking_lot::MutexGuard<'_, T> {
@@ -369,7 +385,7 @@ pub async fn async_start<A: App<T> + 'static, T: 'static>(mut app: A, window_bui
 
                 surface_texture.present();
 
-                window.request_redraw();
+                app.handle_redraw_done(&window); // standard action is to redraw, but that can be overridden.
             } else {
                 app.handle_event(
                     EventContext {