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path: root/testing/web-platform/tests/html/canvas/offscreen/layers/2d.layer.blur-from-outside-canvas.with-clipping.html
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<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<link rel="match" href="2d.layer.blur-from-outside-canvas.with-clipping-expected.html">
<title>Canvas test: 2d.layer.blur-from-outside-canvas.with-clipping</title>
<h1>2d.layer.blur-from-outside-canvas.with-clipping</h1>
<p class="desc">Checks blur leaking inside from drawing outside the canvas</p>
<canvas id="canvas" width="200" height="200">
  <p class="fallback">FAIL (fallback content)</p>
</canvas>
<script>
  const canvas = new OffscreenCanvas(200, 200);
  const ctx = canvas.getContext('2d');

  const clipRegion = new Path2D();
  clipRegion.rect(20, 20, 160, 160);
  ctx.clip(clipRegion);

  ctx.beginLayer({filter: [ {name: 'gaussianBlur', stdDeviation: 30} ]});

  ctx.fillStyle = 'turquoise';
  ctx.fillRect(201, 50, 100, 100);
  ctx.fillStyle = 'indigo';
  ctx.fillRect(50, 201, 100, 100);
  ctx.fillStyle = 'orange';
  ctx.fillRect(-1, 50, -100, 100);
  ctx.fillStyle = 'brown';
  ctx.fillRect(50, -1, 100, -100);

  ctx.endLayer();

  const outputCanvas = document.getElementById("canvas");
  outputCanvas.getContext('2d').drawImage(canvas, 0, 0);
</script>