Add Chromium-only Blender WebEngine parity work

web/app/src/platform/capabilities.ts

@@ -0,0 +1,54 @@
+export interface BrowserCapabilities {
+  webgl2: boolean;
+  offscreenCanvas: boolean;
+  opfs: boolean;
+  sharedArrayBuffer: boolean;
+  worker: boolean;
+  wasm: boolean;
+  wasmSimd: boolean;
+  wasmThreads: boolean;
+  storageEstimate: boolean;
+  indexedDb: boolean;
+}
+
+function supportsWasmFeature(feature: "simd" | "threads"): boolean {
+  if (typeof WebAssembly === "undefined") return false;
+
+  const modules: Record<typeof feature, Uint8Array> = {
+    simd: new Uint8Array([
+      0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x04, 0x01, 0x60,
+      0x00, 0x00, 0x03, 0x02, 0x01, 0x00, 0x0a, 0x0b, 0x01, 0x09, 0x00, 0xfd,
+      0x00, 0x00, 0x0b,
+    ]),
+    threads: new Uint8Array([
+      0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x04, 0x01, 0x60,
+      0x00, 0x00, 0x05, 0x04, 0x01, 0x01, 0x01, 0x00, 0x0a, 0x04, 0x01, 0x02,
+      0x00, 0x0b,
+    ]),
+  };
+
+  try {
+    return WebAssembly.validate(modules[feature] as BufferSource);
+  } catch {
+    return false;
+  }
+}
+
+export function detectBrowserCapabilities(): BrowserCapabilities {
+  const canvas = typeof document === "undefined" ? undefined : document.createElement("canvas");
+  const webgl2 = Boolean(canvas?.getContext("webgl2"));
+  const storage = typeof navigator === "undefined" ? undefined : navigator.storage;
+
+  return {
+    webgl2,
+    offscreenCanvas: typeof OffscreenCanvas !== "undefined",
+    opfs: Boolean(storage?.getDirectory),
+    sharedArrayBuffer: typeof SharedArrayBuffer !== "undefined",
+    worker: typeof Worker !== "undefined",
+    wasm: typeof WebAssembly !== "undefined",
+    wasmSimd: supportsWasmFeature("simd"),
+    wasmThreads: supportsWasmFeature("threads"),
+    storageEstimate: Boolean(storage?.estimate),
+    indexedDb: typeof indexedDB !== "undefined",
+  };
+}