2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

<link rel="match" href="2d.filter.canvasFilterObject.componentTransfer.gamma.tentative-expected.html">

<meta name=fuzzy content="maxDifference=0-2; totalPixels=0-500">

<title>Canvas test: 2d.filter.canvasFilterObject.componentTransfer.gamma.tentative</title>

<h1>2d.filter.canvasFilterObject.componentTransfer.gamma.tentative</h1>

<p class="desc">Test pixels on CanvasFilter() componentTransfer with gamma type</p>

<canvas id="canvas" width="100" height="100">

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

</canvas>

<script>

  const canvas = new OffscreenCanvas(100, 100);

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

  const amplitudes = [2, 1.1, 0.5];

  const exponents = [5, 3, 1];

  const offsets = [0.25, 0, 0.5];

  ctx.filter = new CanvasFilter({name: 'componentTransfer',

      funcR: {type: 'gamma', amplitude: amplitudes[0],

        exponent: exponents[0], offset: offsets[0]},

      funcG: {type: 'gamma', amplitude: amplitudes[1],

        exponent: exponents[1], offset: offsets[1]},

      funcB: {type: 'gamma', amplitude: amplitudes[2],

        exponent: exponents[2], offset: offsets[2]},

});

  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 outputCanvas = document.getElementById("canvas");

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

</script>