konva/lib/filters/Invert.js

<p align="center"> <img src="https://konvajs.org/android-chrome-192x192.png" alt="Konva logo" height="180" /> </p>

export const Invert = function (imageData) {
    var data = imageData.data, len = data.length, i;
    for (i = 0; i < len; i += 4) {
        data[i] = 255 - data[i];
        data[i + 1] = 255 - data[i + 1];
        data[i + 2] = 255 - data[i + 2];
    }
};