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path: root/testing/web-platform/tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.w.html
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<!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.filter.canvasFilterObject.componentTransfer.identity.tentative-expected.html">
<title>Canvas test: 2d.filter.canvasFilterObject.componentTransfer.identity.tentative</title>
<h1>2d.filter.canvasFilterObject.componentTransfer.identity.tentative</h1>
<p class="desc">Test pixels on CanvasFilter() componentTransfer with identity type</p>
<canvas id="canvas" width="100" height="100">
  <p class="fallback">FAIL (fallback content)</p>
</canvas>
<script id='myWorker' type='text/worker'>
  self.onmessage = function(e) {
    const canvas = new OffscreenCanvas(100, 100);
    const ctx = canvas.getContext('2d');

    ctx.filter = new CanvasFilter({name: 'componentTransfer',
        funcR: {type: 'identity'},
        funcG: {type: 'identity'},
        funcB: {type: 'identity'},
    });

    const inputColors = [
        [255, 255, 255],
        [0, 0, 0],
        [127, 0, 34],
        [252, 186, 3],
        [50, 68, 87],
    ];

    for (let i = 0 ; i < inputColors.length ; ++i) {
        const color = inputColors[i];
        ctx.fillStyle = `rgb(${color[0]}, ${color[1]}, ${color[2]})`;
        ctx.fillRect(i * 10, i * 10, 10, 10);
    }

    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>