Uint8Array migration

ts/util/imagePathToBytes.ts

@@ -0,0 +1,25 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { canvasToBytes } from './canvasToBytes';
+
+export async function imagePathToBytes(src: string): Promise<Uint8Array> {
+  const image = new Image();
+  const canvas = document.createElement('canvas');
+  const context = canvas.getContext('2d');
+  if (!context) {
+    throw new Error(
+      'imagePathToArrayBuffer: could not get canvas rendering context'
+    );
+  }
+
+  image.src = src;
+  await image.decode();
+
+  canvas.width = image.width;
+  canvas.height = image.height;
+
+  context.drawImage(image, 0, 0);
+
+  return canvasToBytes(canvas);
+}