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<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=743615
-->
<head>
  <meta charset="utf-8">
  <title>Test for Bug 743615</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="application/javascript" src="utils_bug743615.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=743615">Mozilla Bug 743615</a>
<p id="display"></p>
<div id="content" style="display: none">
<canvas id="c" width="200" height="200"><canvas>
</div>
<pre id="test">
<script type="application/javascript">

/** Test for structured cloning ImageData. **/

SimpleTest.waitForExplicitFinish();
window.addEventListener('message', windowMessage);
startTest();

function startTest() {
  // Make an ImageData.
  var ctx = document.getElementById('c').getContext('2d');
  ctx.fillStyle = 'rgb(';
  ctx.fillRect(30, 30, 50, 50);

  // Make a blank ImageData.
  var imageData = ctx.createImageData(200, 200);
  is(imageData.data.length, imageData.width * imageData.height * 4,
   'right size for data');

  // Write some things into it.
  var pattern = makePattern(imageData.data.length, 42, 7);
  setPattern(imageData, pattern);
  ok(checkPattern(imageData, pattern), 'Can read it back before sending');

  // PostMessage it to ourselves.
  window.postMessage({ imageData,
                       pattern,
                       dataRef: imageData.data }, '*');
}

function windowMessage(evt) {
  // Check the pattern we received.
  var imageData = evt.data.imageData;
  var pattern = evt.data.pattern;
  ok(checkPattern(imageData, pattern),
     'postMessage from self worked correctly');

  is(imageData.data, evt.data.dataRef,
          'Should have backrefs for imagedata buffer');

  // Make a new pattern, and send it to a worker.
  pattern = makePattern(imageData.data.length, 4, 3);
  setPattern(imageData, pattern);
  var worker = new Worker('worker_bug743615.js');
  worker.onmessage = workerMessage;
  worker.postMessage( {imageData, pattern });
}

function workerMessage(evt) {
  // Relay the results of the worker-side tests.
  is(evt.data.statusMessage, 'PASS', evt.data.statusMessage);

  // Test what the worker sent us.
  ok(checkPattern(evt.data.imageData, evt.data.pattern),
     'postMessage from worker worked correctly');

  // All done.
  SimpleTest.finish();
}

</script>
</pre>
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