mirror of
https://github.com/GoogleChromeLabs/squoosh.git
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33 lines
1.2 KiB
TypeScript
33 lines
1.2 KiB
TypeScript
/**
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* Copyright 2020 Google Inc. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import type { WebPModule } from 'codecs/webp/wasm_build/base/dec/webp_dec';
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import { initEmscriptenModule, blobToArrayBuffer } from 'features/worker-utils';
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let emscriptenModule: Promise<WebPModule>;
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export default async function decode(blob: Blob): Promise<ImageData> {
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if (!emscriptenModule) {
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const decoder = await import('codecs/webp/wasm_build/base/dec/webp_dec');
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emscriptenModule = initEmscriptenModule(decoder.default);
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}
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const [module, data] = await Promise.all([
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emscriptenModule,
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blobToArrayBuffer(blob),
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]);
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const result = module.decode(data);
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if (!result) throw new Error('Decoding error');
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return result;
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}
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