Integrate WASI module with Squoosh UI

src/features/worker-utils/index.ts

@@ -29,3 +29,16 @@ export function initEmscriptenModule<T extends EmscriptenWasm.Module>(
 export function blobToArrayBuffer(blob: Blob): Promise<ArrayBuffer> {
   return new Response(blob).arrayBuffer();
 }
+
+export async function instantiateStreaming(
+  resp: Response | PromiseLike<Response>,
+  importObj?: WebAssembly.Imports,
+): Promise<WebAssembly.WebAssemblyInstantiatedSource> {
+  if (WebAssembly.instantiateStreaming) {
+    return WebAssembly.instantiateStreaming(resp, importObj);
+  }
+  return WebAssembly.instantiate(
+    await Promise.resolve(resp).then((r) => r.arrayBuffer()),
+    importObj,
+  );
+}

src/features/worker-utils/wasi-utils.ts

@@ -0,0 +1,32 @@
+/**
+ * Copyright 2021 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export function makeEverythingElseThrow(obj: { [x: string]: {} }): {} {
+  return new Proxy(obj, {
+    get(target, prop: string) {
+      if (prop in target) {
+        return target[prop];
+      }
+      return () => {
+        throw Error(`${prop} not implemented`);
+      };
+    },
+  });
+}
+
+export function makeWasiEnv() {
+  return {
+    environ_sizes_get: () => 0,
+    environ_get: () => 0,
+  };
+}