image-js/lib/save/encodeJpeg.js

Image processing and manipulation in JavaScript

import { encode } from 'jpeg-js';
import { Mask } from '../Mask.js';
/**
 * Creates a JPEG buffer from an image.
 * @param image - The image instance.
 * @param options - JPEG encoding options.
 * @returns The buffer.
 */
export function encodeJpeg(image, options = {}) {
    const { quality = 50 } = options;
    if (image.colorModel !== 'RGBA' || image instanceof Mask) {
        image = image.convertColor('RGBA');
    }
    if (image.bitDepth !== 8) {
        image = image.convertBitDepth(8);
    }
    // Image data after bit depth conversion will always be UInt8Array.
    const buffer = encode(image.getRawImage(), quality).data;
    return new Uint8Array(buffer.buffer, buffer.byteOffset, buffer.byteLength);
}
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