JSFiddle - React, Tailwind, and code Playground

HTML

<canvas id="canvas" width=250></canvas>

JavaScript

var canvas = document.getElementById("canvas");
var ctx = canvas.getContext("2d");

img = new Image();
img.onload = function () {

    canvas.height = canvas.width * (img.height / img.width);

    
    var oc = document.createElement('canvas'),
        octx = oc.getContext('2d');

    oc.width = img.width * 0.5;
    oc.height = img.height * 0.5;
    octx.drawImage(img, 0, 0, oc.width, oc.height);

    
    octx.drawImage(oc, 0, 0, oc.width * 0.5, oc.height * 0.5);

    ctx.drawImage(oc, 0, 0, oc.width * 0.5, oc.height * 0.5,
    0, 0, canvas.width, canvas.height);
}
img.src = "http://i.imgur.com/0T5r0Gu.png";