image-js/lib/load/decode.js

Image processing and manipulation in JavaScript

import imageType from 'image-type';
import { match } from 'ts-pattern';
import { decodeBmp } from "./decodeBmp.js";
import { decodeJpeg } from './decodeJpeg.js';
import { decodePng } from './decodePng.js';
import { decodeTiff } from './decodeTiff.js';
/**
 * Decode input data. Data format is automatically detected.
 * Possible formats: png, jpeg and tiff.
 * @param data - Data to decode.
 * @returns The decoded image.
 */
export function decode(data) {
    const typedArray = new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
    const type = imageType(typedArray);
    return match(type)
        .with({ mime: 'image/png' }, () => decodePng(typedArray))
        .with({ mime: 'image/jpeg' }, () => decodeJpeg(typedArray))
        .with({ mime: 'image/tiff' }, () => decodeTiff(typedArray))
        .with({ mime: 'image/bmp' }, () => decodeBmp(typedArray))
        .otherwise(() => {
        throw new RangeError(`invalid data format: ${type?.mime}`);
    });
}
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