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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
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image/test/mochitest/test_bug399925.html Normal file
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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=399925
-->
<head>
<title>Test for Bug 399925</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="imgutils.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=399925">Mozilla Bug 399925</a>
<p id="display"></p>
<div id="content" style="display: none">
<canvas id="canvas" width="100" height="100"> </canvas>
</div>
<pre id="test">
<script class="testbody" type="text/javascript">
/** Test for Bug 399925. **/
var triggerDiscardingManually = false;
var pngResults = new Array();
SimpleTest.waitForExplicitFinish();
SimpleTest.requestFlakyTimeout("untriaged");
window.onload = function() {
// It'd be nice to reduce the discard timer here, but unfortunately we only
// read that pref on startup. We instead manually trigger discarding on
// platforms where the discard timer is too long (which we'll somewhat
// arbitrarily define as 'longer than 60 seconds').
var expirationMs =
SpecialPowers.getIntPref('image.mem.surfacecache.min_expiration_ms');
if (expirationMs > 60000) {
ok(true, 'Triggering discarding manually because SurfaceCache expiration ' +
'is ' + expirationMs + ' ms');
triggerDiscardingManually = true;
} else {
ok(true, 'Using normal discarding because SurfaceCache expiration ' +
'is ' + expirationMs + ' ms');
}
// Enable discarding for the test.
SpecialPowers.pushPrefEnv({
'set':[['image.mem.discardable',true]]
}, runTest);
}
function runTest() {
var image = new Image();
image.setAttribute("id", "gif");
// 1. Draw the canvas once on loadComplete
// 2. Redraw the canvas and compare the results right on discard
addCallbacks(image, drawCanvas, function() {
drawCanvas();
is(pngResults[0], pngResults[1], "got different rendered results");
SimpleTest.finish();
});
image.src = "bug399925.gif";
document.getElementById("content").appendChild(image);
if (triggerDiscardingManually) {
var request = SpecialPowers.wrap(image)
.QueryInterface(SpecialPowers.Ci.nsIImageLoadingContent)
.getRequest(SpecialPowers.Ci.nsIImageLoadingContent.CURRENT_REQUEST);
setTimeout(() => request.requestDiscard(), 1000);
}
}
function addCallbacks(anImage, loadCompleteCallback, discardCallback) {
var observer = new ImageDecoderObserverStub();
observer.discard = function () {
imgLoadingContent.removeObserver(scriptedObserver);
discardCallback();
}
observer.loadComplete = loadCompleteCallback;
observer = SpecialPowers.wrapCallbackObject(observer);
var scriptedObserver = SpecialPowers.Cc["@mozilla.org/image/tools;1"]
.getService(SpecialPowers.Ci.imgITools)
.createScriptedObserver(observer);
var imgLoadingContent =
SpecialPowers.wrap(anImage)
.QueryInterface(SpecialPowers.Ci.nsIImageLoadingContent);
imgLoadingContent.addObserver(scriptedObserver);
}
function drawCanvas() {
var canvas = document.getElementById('canvas');
var context = canvas.getContext('2d');
var gif = document.getElementById('gif');
context.drawImage(gif, 0, 0);
ok(true, "we got through the drawImage call without an exception being thrown");
pngResults.push(canvas.toDataURL());
}
</script>
</pre>
</body>
</html>