From 729d10592f4e802f91c555c309ff3ba4b119f843 Mon Sep 17 00:00:00 2001
From: Maze Winther <mazewinther@gmail.com>
Date: Sun, 19 Apr 2026 07:42:52 +0200
Subject: fix: WebGL frame rendering and opencut-wasm 0.2.8

---
 rust/wasm/src/gpu.rs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

(limited to 'rust/wasm/src/gpu.rs')

diff --git a/rust/wasm/src/gpu.rs b/rust/wasm/src/gpu.rs
index 4e65978c..52c051f0 100644
--- a/rust/wasm/src/gpu.rs
+++ b/rust/wasm/src/gpu.rs
@@ -19,9 +19,27 @@ thread_local! {
     static GPU_RUNTIME: RefCell<Option<GpuRuntime>> = const { RefCell::new(None) };
 }
 
+fn set_panic_hook() {
+    static SET_HOOK: std::sync::Once = std::sync::Once::new();
+    SET_HOOK.call_once(|| {
+        std::panic::set_hook(Box::new(|info| {
+            // Store the full panic message in window.__wasmPanic so the JS catch block
+            // can surface it instead of the opaque "Unreachable" WASM trap message.
+            if let Some(window) = web_sys::window() {
+                let _ = Reflect::set(
+                    &window,
+                    &JsValue::from_str("__wasmPanic"),
+                    &JsValue::from_str(&info.to_string()),
+                );
+            }
+            console_error_panic_hook::hook(info);
+        }));
+    });
+}
+
 #[wasm_bindgen(js_name = initializeGpu)]
 pub async fn initialize_gpu() -> Result<(), JsValue> {
-    console_error_panic_hook::set_once();
+    set_panic_hook();
 
     if GPU_RUNTIME.with(|runtime| runtime.borrow().is_some()) {
         return Ok(());
-- 
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