test_bug743615.html

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<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=743615

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<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"/>

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<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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