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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:44:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-21 11:44:51 +0000
commit9e3c08db40b8916968b9f30096c7be3f00ce9647 (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /image/test/mochitest/test_discardAnimatedImage.html
parentInitial commit. (diff)
downloadthunderbird-9e3c08db40b8916968b9f30096c7be3f00ce9647.tar.xz
thunderbird-9e3c08db40b8916968b9f30096c7be3f00ce9647.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=686905
+-->
+<head>
+ <title>Test that animated images can be discarded</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <script src="/tests/SimpleTest/WindowSnapshot.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=686905">Mozilla Bug 686905</a>
+<p id="display"></p>
+<div id="content">
+ <div id="container">
+ <canvas id="canvas" width="100" height="100"></canvas>
+ <img id="infinitepng" src="infinite-apng.png">
+ <img id="infinitegif" src="animated1.gif">
+ <img id="infinitewebp" src="infinite.webp">
+ <img id="infiniteavif" src="infinite.avif">
+ <img id="finitepng" src="restore-previous.png">
+ <img id="finitegif" src="animated-gif.gif">
+ <img id="finitewebp" src="keep.webp">
+ <img id="finiteavif" src="animated-avif.avif">
+ </div>
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 686905. **/
+SimpleTest.waitForExplicitFinish();
+
+var gFinished = false;
+
+var gNumDiscards = 0;
+
+window.onload = function() {
+ // Enable discarding for the test.
+ SpecialPowers.pushPrefEnv({
+ 'set':[['image.mem.discardable',true],
+ ['image.webp.enabled',true],
+ ['image.avif.sequence.enabled',true]]
+ }, runTest);
+}
+
+var gImgs = ['infinitepng', 'infinitegif', 'infinitewebp', 'infiniteavif',
+ 'finitepng', 'finitegif', 'finitewebp', 'finiteavif'];
+// If we are currently counting frame updates.
+var gCountingFrameUpdates = false;
+// The number of frame update notifications for the images in gImgs that happen
+// after discarding. (The last two images are finite looping so we don't expect
+// them to get incremented but it's possible if they don't finish their
+// animation before we discard them.)
+var gNumFrameUpdates = [0, 0, 0, 0, 0, 0];
+// The last snapshot of the image. Used to check that the image actually changes.
+var gLastSnapShot = [null, null, null, null, null, null];
+// Number of observed changes in the snapshot.
+var gNumSnapShotChanges = [0, 0, 0, 0, 0, 0];
+// If we've removed the observer.
+var gRemovedObserver = [false, false, false, false, false, false];
+
+// 2 would probably be a good enough test, we arbitrarily choose 4.
+var kNumFrameUpdatesToExpect = 4;
+
+function runTest() {
+ var animatedDiscardable =
+ SpecialPowers.getBoolPref('image.mem.animated.discardable');
+ if (!animatedDiscardable) {
+ ok(true, "discarding of animated images is disabled, nothing to test");
+ SimpleTest.finish();
+ return;
+ }
+
+ setTimeout(step2, 0);
+}
+
+function step2() {
+ // Draw the images to canvas to force them to be decoded.
+ for (let i = 0; i < gImgs.length; i++) {
+ drawCanvas(document.getElementById(gImgs[i]));
+ }
+
+ for (let i = 0; i < gImgs.length; i++) {
+ addCallbacks(document.getElementById(gImgs[i]), i);
+ }
+
+ setTimeout(step3, 0);
+}
+
+function step3() {
+ document.getElementById("container").style.display = "none";
+ document.documentElement.offsetLeft; // force that style to take effect
+
+ for (var i = 0; i < gImgs.length; i++) {
+ requestDiscard(document.getElementById(gImgs[i]));
+ }
+
+ // the discard observers will call step4
+}
+
+function step4() {
+ gCountingFrameUpdates = true;
+ document.getElementById("container").style.display = "";
+
+ // Draw the images to canvas to force them to be decoded again.
+ for (var i = 0; i < gImgs.length; i++) {
+ drawCanvas(document.getElementById(gImgs[i]));
+ }
+}
+
+function checkIfFinished() {
+ if (gFinished) {
+ return;
+ }
+
+ if ((gNumFrameUpdates[0] >= kNumFrameUpdatesToExpect) &&
+ (gNumFrameUpdates[1] >= kNumFrameUpdatesToExpect) &&
+ (gNumFrameUpdates[2] >= kNumFrameUpdatesToExpect) &&
+ (gNumSnapShotChanges[0] >= kNumFrameUpdatesToExpect) &&
+ (gNumSnapShotChanges[1] >= kNumFrameUpdatesToExpect) &&
+ (gNumSnapShotChanges[2] >= kNumFrameUpdatesToExpect)) {
+ ok(true, "got expected frame updates");
+ gFinished = true;
+ SimpleTest.finish();
+ }
+}
+
+// arrayIndex is the index into the arrays gNumFrameUpdates and gNumDecodes
+// to increment when a frame update notification is received.
+function addCallbacks(anImage, arrayIndex) {
+ var observer = new ImageDecoderObserverStub();
+ observer.discard = function () {
+ gNumDiscards++;
+ ok(true, "got image discard");
+ if (arrayIndex >= 3) {
+ // The last two images are finite, so we don't expect any frame updates,
+ // this image is done the test, so remove the observer.
+ if (!gRemovedObserver[arrayIndex]) {
+ gRemovedObserver[arrayIndex] = true;
+ imgLoadingContent.removeObserver(scriptedObserver);
+ }
+ }
+ if (gNumDiscards == gImgs.length) {
+ step4();
+ }
+ };
+ observer.frameUpdate = function () {
+ if (!gCountingFrameUpdates) {
+ return;
+ }
+
+ // Do this off a setTimeout since nsImageLoadingContent uses a scriptblocker
+ // when it notifies us and calling drawWindow can call will paint observers
+ // which can dispatch a scrollport event, and events assert if dispatched
+ // when there is a scriptblocker.
+ setTimeout(function () {
+ gNumFrameUpdates[arrayIndex]++;
+
+ var r = document.getElementById(gImgs[arrayIndex]).getBoundingClientRect();
+ var snapshot = snapshotRect(window, r, "rgba(0,0,0,0)");
+ if (gLastSnapShot[arrayIndex] != null) {
+ if (snapshot.toDataURL() != gLastSnapShot[arrayIndex].toDataURL()) {
+ gNumSnapShotChanges[arrayIndex]++;
+ }
+ }
+ gLastSnapShot[arrayIndex] = snapshot;
+
+ if (gNumFrameUpdates[arrayIndex] >= kNumFrameUpdatesToExpect &&
+ gNumSnapShotChanges[arrayIndex] >= kNumFrameUpdatesToExpect) {
+ if (!gRemovedObserver[arrayIndex]) {
+ gRemovedObserver[arrayIndex] = true;
+ imgLoadingContent.removeObserver(scriptedObserver);
+ }
+ }
+ if (!gFinished) {
+ // because we do this in a setTimeout we can have several in flight
+ // so don't call ok if we've already finished.
+ ok(true, "got frame update");
+ }
+ checkIfFinished();
+ }, 0);
+ };
+ observer = SpecialPowers.wrapCallbackObject(observer);
+
+ var scriptedObserver = SpecialPowers.Cc["@mozilla.org/image/tools;1"]
+ .getService(SpecialPowers.Ci.imgITools)
+ .createScriptedObserver(observer);
+
+ var imgLoadingContent = SpecialPowers.wrap(anImage);
+ imgLoadingContent.addObserver(scriptedObserver);
+}
+
+function requestDiscard(anImage) {
+ var request = SpecialPowers.wrap(anImage)
+ .getRequest(SpecialPowers.Ci.nsIImageLoadingContent.CURRENT_REQUEST);
+ setTimeout(() => request.requestDiscard(), 0);
+}
+
+function drawCanvas(anImage) {
+ var canvas = document.getElementById('canvas');
+ var context = canvas.getContext('2d');
+
+ context.clearRect(0,0,100,100);
+ var cleared = canvas.toDataURL();
+
+ context.drawImage(anImage, 0, 0);
+ ok(true, "we got through the drawImage call without an exception being thrown");
+
+ ok(cleared != canvas.toDataURL(), "drawImage drew something");
+}
+
+</script>
+</pre>
+</body>
+</html>
+
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