Rollup build

src/features/encoders/avif/worker/avifEncode.ts

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+/**
+ * Copyright 2020 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.
+ */
+import type { AVIFModule } from 'codecs/avif/enc/avif_enc';
+import type { EncodeOptions } from '../shared/meta';
+import wasmUrlWithoutMT from 'url:codecs/avif/enc/avif_enc.wasm';
+import wasmUrlWithMT from 'url:codecs/avif/enc/avif_enc_mt.wasm';
+import workerUrl from 'omt:codecs/avif/enc/avif_enc_mt.worker.js';
+import { initEmscriptenModule } from 'features/worker-utils';
+import { threads } from 'wasm-feature-detect';
+
+let emscriptenModule: Promise<AVIFModule>;
+
+async function init() {
+  if (await threads()) {
+    const avifEncoder = await import('codecs/avif/enc/avif_enc_mt');
+    return initEmscriptenModule<AVIFModule>(
+      avifEncoder.default,
+      wasmUrlWithMT,
+      workerUrl,
+    );
+  }
+  const avifEncoder = await import('codecs/avif/enc/avif_enc.js');
+  return initEmscriptenModule(avifEncoder.default, wasmUrlWithoutMT);
+}
+
+export default async function encode(
+  data: ImageData,
+  options: EncodeOptions,
+): Promise<ArrayBuffer> {
+  if (!emscriptenModule) emscriptenModule = init();
+
+  const module = await emscriptenModule;
+  const result = module.encode(data.data, data.width, data.height, options);
+
+  if (!result) throw new Error('Encoding error');
+
+  // wasm can’t run on SharedArrayBuffers, so we hard-cast to ArrayBuffer.
+  return result.buffer as ArrayBuffer;
+}