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36 lines
1.3 KiB
TypeScript
36 lines
1.3 KiB
TypeScript
/*
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Copyright 2021 New Vector Ltd
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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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/**
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* Fetch an image using the best available method based on browser compatibility
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* @param url the URL of the image to fetch
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* @returns a canvas drawable object
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*/
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export async function getDrawable(url: string): Promise<CanvasImageSource> {
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if ('createImageBitmap' in window) {
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const response = await fetch(url);
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const blob = await response.blob();
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return await createImageBitmap(blob);
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} else {
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return new Promise<HTMLImageElement>((resolve, reject) => {
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const img = document.createElement("img");
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img.crossOrigin = "anonymous";
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img.onload = () => resolve(img);
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img.onerror = (e) => reject(e);
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img.src = url;
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});
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}
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}
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