2009-05-11 23:15:42 +04:00
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<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=490949
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-->
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<head>
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<title>Test for Bug 490949</title>
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<script type="application/javascript" src="/MochiKit/MochiKit.js"></script>
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2019-04-16 06:50:44 +03:00
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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2009-05-11 23:15:42 +04:00
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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2012-09-07 09:29:47 +04:00
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<body>
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2009-05-11 23:15:42 +04:00
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=490949">Mozilla Bug 490949</a>
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<p id="display"></p>
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<div id="content" style="display: none">
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<canvas id="canvas" width="100" height="100"> </canvas>
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</div>
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<pre id="test">
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<script type="application/javascript">
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SimpleTest.waitForExplicitFinish();
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var canvas = document.getElementById('canvas');
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var first, second, third;
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2019-08-29 15:59:57 +03:00
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var RemoteCanvas = function() {
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2009-05-11 23:15:42 +04:00
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this.url = "bug490949-iframe.html";
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};
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RemoteCanvas.CANVAS_WIDTH = 100;
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RemoteCanvas.CANVAS_HEIGHT = 100;
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RemoteCanvas.prototype.load = function(cb) {
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this.cb = cb;
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var windowWidth = window.innerWidth - 25;
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var iframe;
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iframe = document.createElement("iframe");
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iframe.id = "test-iframe";
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iframe.height = "10px";
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iframe.width = windowWidth + "px";
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iframe.style.visibility = "hidden";
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iframe.src = this.url;
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// Here is where the magic happens... add a listener to the
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// frame's onload event - it will call handleEvent
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iframe.addEventListener("load", this, true);
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2019-05-24 20:34:09 +03:00
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// append to the end of the page
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2009-05-11 23:15:42 +04:00
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window.document.body.appendChild(iframe);
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};
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RemoteCanvas.prototype.reload = function(cb, force) {
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this.cb = cb;
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window.frames[0].location.reload(force);
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}
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RemoteCanvas.prototype.handleEvent = function() {
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// Look back up the iframe by id
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var ldrFrame = document.getElementById("test-iframe");
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2012-09-07 09:29:47 +04:00
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// Get a reference to the window object you need for the
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// SpecialPowers.snapshotRect method
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2009-05-11 23:15:42 +04:00
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var remoteWindow = ldrFrame.contentWindow;
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2019-05-24 20:34:09 +03:00
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// Draw canvas
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2009-05-11 23:15:42 +04:00
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canvas.style.width = RemoteCanvas.CANVAS_WIDTH + "px";
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canvas.style.height = RemoteCanvas.CANVAS_HEIGHT + "px";
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canvas.width = RemoteCanvas.CANVAS_WIDTH;
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canvas.height = RemoteCanvas.CANVAS_HEIGHT;
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var windowWidth = window.innerWidth - 25;
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var windowHeight = window.innerHeight;
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2012-09-07 09:29:47 +04:00
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var rect = { left: 0, top: 0, width: windowWidth, height: windowHeight };
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var snapshot = SpecialPowers.snapshotRect(remoteWindow, rect, "rgb(0,0,0)");
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2009-05-11 23:15:42 +04:00
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var ctx = canvas.getContext("2d");
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ctx.clearRect(0, 0,
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RemoteCanvas.CANVAS_WIDTH,
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RemoteCanvas.CANVAS_HEIGHT);
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ctx.save();
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ctx.scale(RemoteCanvas.CANVAS_WIDTH / windowWidth,
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RemoteCanvas.CANVAS_HEIGHT / windowHeight);
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2012-09-07 09:29:47 +04:00
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ctx.drawImage(snapshot, 0, 0);
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2009-05-11 23:15:42 +04:00
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ctx.restore();
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this.cb();
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};
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function checkFirst()
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{
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first = canvas.toDataURL();
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remoteCanvas.reload(checkForceReload, true);
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}
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function checkForceReload()
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{
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second = canvas.toDataURL();
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ok(first != second, "We got the wrong image.");
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remoteCanvas.reload(checkLazyReload, false);
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}
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function checkLazyReload()
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{
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third = canvas.toDataURL();
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ok(second != third, "We got the wrong image.");
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SimpleTest.finish();
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}
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var remoteCanvas = new RemoteCanvas();
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remoteCanvas.load(checkFirst);
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</script>
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</pre>
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</body>
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</html>
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