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Test Info:
<!DOCTYPE html>
<html class="reftest-wait">
<head>
<style>
html, body {
margin: 0;
padding: 0;
}
video {
width: 320px;
height:240px;
}
#mask {
position: absolute;
z-index: 3;
width: 320px;
height: 200px;
background-color: green;
top: 0;
left: 0;
}
#vid-preload-image {
visibility: hidden;
}
</style>
<script>
function addCCToVid(videoElem) {
videoElem.addTextTrack("subtitles", "English", "en");
}
</script>
</head>
<body>
<video id="vid" controls></video>
<div id="mask"></div>
<!-- Create a hidden video with CC button displayed upfront to decode image
earlier, so that the CC image will be ready to paint once the track added. -->
<video id="vid-preload-image" controls>
<track kind="subtitles" src="foo.vtt" srclang="en">
</video>
<script>
function doTest() {
var vid = document.getElementById("vid");
// Videocontrols binding's "addtrack" handler synchronously fires
// "adjustControlSize()" first, and then the layout is ready for
// the reftest snapshot.
vid.textTracks.addEventListener("addtrack", function() {
document.documentElement.removeAttribute("class");
});
addCCToVid(vid);
}
window.addEventListener("MozReftestInvalidate", doTest);
</script>
</body>
</html>