testing/web-platform/tests/html/canvas/element/layers/2d.layer.global-states.filter.alpha.blending.html

   1 <!DOCTYPE html>
   2 <!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
   3 <link rel="match" href="2d.layer.global-states.filter.alpha.blending-expected.html">
   4 <meta name=fuzzy content="maxDifference=0-1; totalPixels=0-2453">
   5 <title>Canvas test: 2d.layer.global-states.filter.alpha.blending</title>
   6 <h1>2d.layer.global-states.filter.alpha.blending</h1>
   7 <p class="desc">Checks that layers with filters correctly use global render states.</p>
   8 <canvas id="canvas" width="200" height="200">
   9   <p class="fallback">FAIL (fallback content)</p>
  10 </canvas>
  11 <script>
  12   const canvas = document.getElementById("canvas");
  13   const ctx = canvas.getContext('2d');
  14
  15   ctx.fillStyle = 'rgba(0, 0, 255, 1)';
  16
  17   var circle = new Path2D();
  18   circle.arc(90, 90, 45, 0, 2 * Math.PI);
  19   ctx.fill(circle);
  20
  21   ctx.globalAlpha = 0.6;
  22   ctx.globalCompositeOperation = 'multiply';
  23
  24   ctx.beginLayer({filter: [
  25       {name: 'colorMatrix', values: [0.393, 0.769, 0.189, 0, 0,
  26                                      0.349, 0.686, 0.168, 0, 0,
  27                                      0.272, 0.534, 0.131, 0, 0,
  28                                      0, 0, 0, 1, 0]},
  29       {name: 'componentTransfer',
  30           funcA: {type: "table", tableValues: [0, 0.7]}},
  31       {name: 'dropShadow', dx: 5, dy: 5, floodColor: '#81e'}]});
  32
  33   ctx.fillStyle = 'rgba(200, 0, 0, 1)';
  34   ctx.fillRect(50, 50, 75, 50);
  35   ctx.fillStyle = 'rgba(0, 200, 0, 1)';
  36   ctx.fillRect(70, 70, 75, 50);
  37
  38   ctx.endLayer();
  39 </script>