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path: root/testing/web-platform/tests/html/canvas/offscreen/pixel-manipulation/2d.imageData.get.order.alpha.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.imageData.get.order.alpha
// Description:getImageData() returns A in the fourth component
// Note:

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

var t = async_test("getImageData() returns A in the fourth component");
var t_pass = t.done.bind(t);
var t_fail = t.step_func(function(reason) {
    throw reason;
});
t.step(function() {

  var canvas = new OffscreenCanvas(100, 50);
  var ctx = canvas.getContext('2d');

  ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
  ctx.fillRect(0, 0, 100, 50);
  var imgdata = ctx.getImageData(0, 0, 10, 10);
  _assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200");
  _assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100");
  t.done();
});
done();