imagedata-cloned-canvas-in-array.html

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This WPT test may be referenced by the following Test IDs:
- /workers/interfaces/DedicatedWorkerGlobalScope/postMessage/imagedata-cloned-canvas-in-array.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>posting an imagedata (from a cloned canvas) in an array</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="log"></div>

<script>

(async_test()).step(function() {

  var worker = new Worker('imagedata-cloned-canvas-in-array.js');

  var canvas = document.createElement('canvas');

  var clone = canvas.cloneNode(true);

  var ctx = clone.getContext('2d');

  var imagedata = ctx.getImageData(0, 0, 300, 150);

  worker.postMessage([imagedata]);

  worker.onmessage = this.step_func(function(e) {

    var pixeldata = e.data.data;

    for (var i = 0; i < pixeldata.length; i++) {

      assert_equals(pixeldata[i], (i % 4 == 0) ? 128 : 0);

    this.done();

});

});

</script>