<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<canvas id="canvas" style="border: 1px solid #aaa;display: block;margin: 50px auto;"></canvas>
</div>
</body>
<script>
window.onload = function () {
var canvas = document.getElementById("canvas");
var ctx = canvas.getContext('2d');
canvas.width = 800;
canvas.height = 800;
drawHeart(ctx,400,400,50,30);
}
function drawHeart(ctx,x,y,R,rot) {
ctx.save();
ctx.translate(x,y);
ctx.rotate(rot/180*Math.PI);
ctx.scale(R, R);
heartPath(ctx);
ctx.fillStyle = "red";
ctx.shadowColor = "gray";
ctx.shadowOffsetX = 5;
ctx.shadowOffsetY = 5;
ctx.shadowBlur = 5;
ctx.fill();
ctx.restore();
}
function heartPath(ctx) {
ctx.beginPath();
ctx.arc(-1,0,1,Math.PI,0,false);
ctx.arc(1,0,1,Math.PI,0,false);
ctx.bezierCurveTo(1.9, 1.2, 0.6, 1.6, 0, 3.0);
ctx.bezierCurveTo( -0.6, 1.6,-1.9, 1.2,-2,0);
ctx.closePath();
}
</script>
</html>