2d.layer.flush-on-frame-presentation.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/element/layers/2d.layer.flush-on-frame-presentation.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->

<html class="reftest-wait">

<link rel="match" href="2d.layer.flush-on-frame-presentation-expected.html">

<title>Canvas test: 2d.layer.flush-on-frame-presentation</title>

<h1>2d.layer.flush-on-frame-presentation</h1>

<p class="desc">Check that layers state stack is flushed and rebuilt on frame renders.</p>

<canvas id="canvas" width="200" height="200">

  <p class="fallback">FAIL (fallback content)</p>

</canvas>

<script type="module">

  const canvas = document.getElementById("canvas");

  const ctx = canvas.getContext('2d');

  ctx.fillStyle = 'purple';

  ctx.fillRect(60, 60, 75, 50);

  ctx.globalAlpha = 0.5;

  ctx.beginLayer({filter: {name: 'dropShadow', dx: -2, dy: 2}});

  ctx.fillRect(40, 40, 75, 50);

  ctx.fillStyle = 'grey';

  ctx.fillRect(50, 50, 75, 50);

  // Force a flush and restoration of the state stack:

  await new Promise(resolve => requestAnimationFrame(resolve));

  ctx.fillRect(70, 70, 75, 50);

  ctx.fillStyle = 'orange';

  ctx.fillRect(80, 80, 75, 50);

  ctx.endLayer();

  ctx.fillRect(80, 40, 75, 50);

  document.documentElement.classList.remove("reftest-wait");

</script>

</html>