2d.layer.drawImage.ctx-filter.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/layers/2d.layer.drawImage.ctx-filter.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

<meta charset="UTF-8">

<link rel="match" href="2d.layer.drawImage.ctx-filter-expected.html">

<title>Canvas test: 2d.layer.drawImage.ctx-filter</title>

<h1>2d.layer.drawImage.ctx-filter</h1>

<p class="desc">Checks that drawImage writes the image to the layer and not the parent directly.</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');

  ctx.fillStyle = 'skyblue';

  ctx.fillRect(0, 0, 100, 100);

  ctx.filter = 'drop-shadow(-10px -10px 0px navy)';

  ctx.beginLayer();

  ctx.fillStyle = 'maroon';

  ctx.fillRect(20, 20, 50, 50);

  ctx.globalCompositeOperation = 'xor';

  // The image should xor only with the layer content, not the parents'.

  const canvas_image = new OffscreenCanvas(200,200);

  const ctx_image = canvas_image.getContext("2d");

  ctx_image.fillStyle = 'pink';

  ctx_image.fillRect(40, 40, 50, 50);

  ctx.drawImage(canvas_image, 0, 0);

  ctx.endLayer();

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

  outputCanvas.getContext('2d').drawImage(canvas, 0, 0);

</script>