OffscreenCanvas-2d-filter-object-blur.html

<head>
<link rel="match" href="canvas-filter-object-blur-expected.html">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
</head>
<body>
  <canvas id="canvas" width="300" height="300"></canvas>
</body>

<body>
  <script id="workerCode">
    self.onmessage = function(event) {
      const offscreenCanvas = new OffscreenCanvas(300, 300);
      const ctx = offscreenCanvas.getContext("2d");
      ctx.filter = new CanvasFilter({name: "gaussianBlur",
                                     stdDeviation: 2});
      ctx.fillStyle = 'yellow';
      ctx.fillRect(10,10,100,100);
      ctx.filter = new CanvasFilter({name: "gaussianBlur",
                                     stdDeviation: 5});
      ctx.fillStyle = 'magenta';
      ctx.fillRect(120, 10, 100, 100);
      ctx.filter = new CanvasFilter([
        {name: "gaussianBlur", stdDeviation: 5},
        {name: "gaussianBlur", stdDeviation: 10}]);
      ctx.fillStyle = 'cyan';
      ctx.fillRect(10, 120, 100, 100);
      ctx.filter = 'none';
      ctx.fillStyle = 'black';
      ctx.fillRect(120, 120, 100, 100);
      var img = offscreenCanvas.transferToImageBitmap();
      self.postMessage(img, img);
    }
  </script>

  <script>
    if (window.testRunner)
      testRunner.waitUntilDone();

    function test() {
      const workerCode = document.querySelector("#workerCode").textContent;
      const blob = new Blob([workerCode], { type: 'text/javascript' });
      const url = URL.createObjectURL(blob);
      const worker = new Worker(url);
      const canvas = document.getElementById("canvas");
      const outputCtx = canvas.getContext("bitmaprenderer");
      worker.postMessage({msg: "go"});
      worker.addEventListener('message', (event) => {
        outputCtx.transferFromImageBitmap(event.data);
        if (window.testRunner)
          testRunner.notifyDone();
      });
    };
    test();
  </script>
</body>

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