var img = new Image();

var canvas = document.createElement('canvas');

var resCanvas = document.createElement('canvas');

var isReady = false;

​

var frameRaw1 = null;

      frameRaw1 = canvas.getContext('2d');

var frameRaw2 = null;

var result = null;

      result = resCanvas.getContext('2d');

​

img.addEventListener('load', function() {

    createImageBitmap(img).then(function(imageBitmap) {

      frameRaw2 = imageBitmap;

      canvas.width = frameRaw2.width;

      canvas.height = frameRaw2.height;

      resCanvas.width = frameRaw2.width;

      resCanvas.height = frameRaw2.height;

      isReady = true;

    });

});

​

img.src = 'https://fastly.picsum.photos/id/159/536/354.jpg?hmac=59u2RZ-L-Vjfrvsa9T21nZU7ylv03-EGGKErZCaf488';