chromium/third_party/blink/web_tests/fast/canvas/OffscreenCanvas-2d-filter-object-blur-expected.html

<body>
  <canvas id="canvas" width="300" height="300"></canvas>
</body>
<script>
  var canvas = document.getElementById('canvas');
  var ctx = canvas.getContext('2d');
  ctx.filter = 'blur(2px)';
  ctx.fillStyle = 'yellow';
  ctx.fillRect(10,10,100,100);
  ctx.filter = 'blur(5px)';
  ctx.fillStyle = 'magenta';
  ctx.fillRect(120, 10, 100, 100);
  ctx.filter = 'blur(5px) blur(10px)';
  ctx.fillStyle = 'cyan';
  ctx.fillRect(10, 120, 100, 100);
  ctx.filter = 'none';
  ctx.fillStyle = 'black';
  ctx.fillRect(120, 120, 100, 100);
</script>