First attempt at Oxipng

src/codecs/oxipng/encoder.ts

@@ -0,0 +1,18 @@
+import * as oxipng from '../../../codecs/oxipng/pkg/oxipng_manual';
+import { EncodeOptions } from './encoder-meta';
+
+export async function compress(data: BufferSource, { level }: EncodeOptions): Promise<ArrayBuffer> {
+  let buffer: ArrayBuffer;
+
+  if (ArrayBuffer.isView(data)) {
+    buffer = data.buffer;
+  } else {
+    buffer = data;
+  }
+  debugger;
+  const resultView = await oxipng.compress(new Uint8Array(buffer), level);
+  const result = new Uint8Array(resultView);
+
+  // wasm can’t run on SharedArrayBuffers, so we hard-cast to ArrayBuffer.
+  return result.buffer as ArrayBuffer;
+}