imgData = {
let skcanvas = CanvasKit.MakeCanvas(600, 600);
let ctx = skcanvas.getContext('2d');
let rgradient = ctx.createRadialGradient(200, 300, 10, 100, 100, 300);
rgradient.addColorStop(0, 'red');
rgradient.addColorStop(0.7, 'white');
rgradient.addColorStop(1, 'blue');
ctx.fillStyle = rgradient;
ctx.globalAlpha = 0.7;
ctx.fillRect(0, 0, 600, 600);
let imgData = skcanvas.toDataURL();
return imgData;
}