Greasy Fork is available in English.
read the title
// ==UserScript==
// @name Diep.io Grayscale Theme
// @namespace http://tampermonkey.net/
// @version 0.1
// @description read the title
// @author bismuth
// @match *diep.io
// @icon data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant none
// @license none
// ==/UserScript==
['stroke','fill'].forEach(method => {
CanvasRenderingContext2D.prototype[method] = new Proxy(CanvasRenderingContext2D.prototype[method], {
apply: (target,_this,args) => {
//console.log(_this.fillStyle);
const fill = [parseInt(_this[`${method}Style`].slice(1,3), 16), parseInt(_this[`${method}Style`].slice(3,5), 16), parseInt(_this[`${method}Style`].slice(5,7), 16)];
const grayscaleValue = ((((fill[0] << 4) - fill[0] + fill[1] + (fill[2] << 4)) >> 5) & 255).toString(16);
_this[`${method}Style`] = `#${grayscaleValue}${grayscaleValue}${grayscaleValue}`;
return Reflect.apply(target,_this,args);
}
});
});