File: 2d.composite.uncovered.pattern.source-out.worker.js

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// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
// OffscreenCanvas test in a worker:2d.composite.uncovered.pattern.source-out
// Description:Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.
// Note:

importScripts("/resources/testharness.js");
importScripts("/html/canvas/resources/canvas-tests.js");

promise_test(async t => {
  var canvas = new OffscreenCanvas(100, 50);
  var ctx = canvas.getContext('2d');

  ctx.fillStyle = 'rgba(0, 255, 255, 0.5)';
  ctx.fillRect(0, 0, 100, 50);
  ctx.globalCompositeOperation = 'source-out';
  const response = await fetch('/images/yellow.png')
  const blob = await response.blob();
  const bitmap = await createImageBitmap(blob);
  ctx.fillStyle = ctx.createPattern(bitmap, 'no-repeat');
  ctx.fillRect(0, 50, 100, 50);
  _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);
}, "Pattern fill() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");
done();