HDR

lib/tests/wgsl_validate.rs

@@ -85,3 +85,34 @@ fn gpu_driven_shader_is_valid_wgsl() {
         "the two compute entry points are expected"
     );
 }
+
+/// Parses and fully validates the embedded `tonemap.wgsl` shader (Étape 20) via naga.
+/// The renderer compiles it into one `RenderPipeline` (vertex `vs_main` + one of the two
+/// fragment entry points `fs_aces` / `fs_reinhard`), so this offline validation is the
+/// guarantee of its validity. The contract expects three entry points.
+#[test]
+fn tonemap_shader_is_valid_wgsl() {
+    let src = include_str!("../src/shaders/tonemap.wgsl");
+    let module = naga::front::wgsl::parse_str(src)
+        .unwrap_or_else(|e| panic!("tonemap.wgsl: parsing error: {e:?}"));
+
+    let mut validator = naga::valid::Validator::new(
+        naga::valid::ValidationFlags::all(),
+        naga::valid::Capabilities::all(),
+    );
+    validator
+        .validate(&module)
+        .unwrap_or_else(|e| panic!("tonemap.wgsl: validation failed: {e:?}"));
+
+    let mut entry_names: Vec<&str> = module
+        .entry_points
+        .iter()
+        .map(|ep| ep.name.as_str())
+        .collect();
+    entry_names.sort();
+    assert_eq!(
+        entry_names,
+        vec!["fs_aces", "fs_reinhard", "vs_main"],
+        "the three entry points are expected"
+    );
+}