summaryrefslogtreecommitdiffstats
path: root/testing/web-platform/tests/html/canvas/offscreen/reset/2d.reset.render.global_composite_operation.w.html
blob: 6df07a47e2f08ca930a0c90459cc7be0fa267dd6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
<!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.reset.render.global_composite_operation-expected.html">
<title>Canvas test: 2d.reset.render.global_composite_operation</title>
<h1>2d.reset.render.global_composite_operation</h1>
<p class="desc">check that canvas correctly renders rectangles with the default global composite operation after reset</p>
<canvas id="canvas" width="400" height="400">
  <p class="fallback">FAIL (fallback content)</p>
</canvas>
<script id='myWorker' type='text/worker'>
  self.onmessage = function(e) {
    const canvas = new OffscreenCanvas(400, 400);
    const ctx = canvas.getContext('2d');

    ctx.globalCompositeOperation = "xor";

    ctx.reset();

    ctx.fillRect(10, 10, 100, 100);
    ctx.fillRect(50, 50, 100, 100);

    const bitmap = canvas.transferToImageBitmap();
    self.postMessage(bitmap, bitmap);
  };
</script>
<script>
  const blob = new Blob([document.getElementById('myWorker').textContent]);
  const worker = new Worker(URL.createObjectURL(blob));
  worker.addEventListener('message', msg => {
    const outputCtx = document.getElementById("canvas").getContext('2d');
    outputCtx.drawImage(msg.data, 0, 0);
    document.documentElement.classList.remove("reftest-wait");
  });
  worker.postMessage(null);
</script>
</html>