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This module exposes `loadImage` with a `Promise` based interface and pre- populates `orientation: true` option to auto-orient input. Returns data URL as string. The module uses a named export as refactoring references of modules with `default` (`module.exports`) export references can be error-prone. See: https://basarat.gitbooks.io/typescript/docs/tips/defaultIsBad.html
28 lines
738 B
JavaScript
28 lines
738 B
JavaScript
// File | Blob | URLString -> LoadImageOptions -> Promise<DataURLString>
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//
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// Documentation for `options`:
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// https://github.com/blueimp/JavaScript-Load-Image/tree/v2.18.0#options
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exports.autoOrientImage = (fileOrBlobOrURL, options) => {
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const optionsWithAutoOrient = Object.assign(
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{},
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options, {
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canvas: true,
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orientation: true,
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}
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);
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return new Promise((resolve, reject) => {
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window.loadImage(fileOrBlobOrURL, canvasOrError => {
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if (canvasOrError.type === 'error') {
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const error = canvasOrError;
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reject(error);
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return;
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}
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const canvas = canvasOrError;
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const dataURL = canvas.toDataURL();
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resolve(dataURL);
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}, optionsWithAutoOrient);
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});
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};
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