2d.composite.uncovered.image.destination-atop.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.image.destination-atop

// Description:drawImage() 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 = 'destination-atop';

  const response = await fetch('/images/yellow.png')

  const blob = await response.blob();

  const bitmap = await createImageBitmap(blob);

  ctx.drawImage(bitmap, 40, 40, 10, 10, 40, 50, 10, 10);

  _assertPixelApprox(canvas, 50,25, 0,0,0,0, 5);

}, "drawImage() draws pixels not covered by the source object as (0,0,0,0), and does not leave the pixels unchanged.");

done();