konva/lib/filters/Brighten.js

HTML5 2d canvas library.

import { Factory } from "../Factory.js";
import { Node } from "../Node.js";
import { getNumberValidator } from "../Validators.js";
export const Brighten = function (imageData) {
    const brightness = this.brightness() * 255, data = imageData.data, len = data.length;
    for (let i = 0; i < len; i += 4) {
        data[i] += brightness;
        data[i + 1] += brightness;
        data[i + 2] += brightness;
    }
};
Factory.addGetterSetter(Node, 'brightness', 0, getNumberValidator(), Factory.afterSetFilter);