image-js/lib/save/encodePng.js

Image processing and manipulation in JavaScript

import { encode } from 'fast-png';
import { Mask } from '../Mask.js';
/**
 * Creates a PNG buffer from an image.
 * @param image - The image instance.
 * @param options - PNG encoding options.
 * @returns The buffer.
 */
export function encodePng(image, options) {
    if ((image.colorModel !== 'RGB' &&
        image.colorModel !== 'RGBA' &&
        image.colorModel !== 'GREY' &&
        image.colorModel !== 'GREYA') ||
        image instanceof Mask) {
        image = image.convertColor('GREY');
    }
    const { bitDepth: depth, ...other } = image.getRawImage();
    return encode({
        depth,
        ...other,
    }, options);
}
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