tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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offscreencanvas.transferrable.html (3012B)

      1 <!DOCTYPE html>
      2 <script src="/resources/testharness.js"></script>
      3 <script src="/resources/testharnessreport.js"></script>
      4 <script src="/html/canvas/resources/canvas-tests.js"></script>
      5 <link rel="help" href="https://html.spec.whatwg.org/#offscreencanvas">
      6 
      7 <script id="myWorker" type="text/worker">
      8 
      9 function test1(offscreenCanvas)
     10 {
     11    return offscreenCanvas.width == 10 && offscreenCanvas.height == 10;
     12 }
     13 
     14 self.onmessage = function(e) {
     15    switch(e.data.msg) {
     16        case 'test1':
     17            self.postMessage(test1(e.data.data));
     18            break;
     19    }
     20 };
     21 
     22 </script>
     23 
     24 <script>
     25 function makeWorker(script)
     26 {
     27    var blob = new Blob([script]);
     28    return new Worker(URL.createObjectURL(blob));
     29 }
     30 
     31 async_test(function(t) {
     32    var worker = makeWorker(document.getElementById("myWorker").textContent);
     33    var offscreenCanvas = new OffscreenCanvas(10, 10);
     34    worker.postMessage({msg: 'test1', data: offscreenCanvas}, [offscreenCanvas]);
     35    worker.addEventListener('message', t.step_func_done(function(msg) {
     36        assert_true(msg.data);
     37    }));
     38    assert_equals(offscreenCanvas.width, 0);
     39    assert_equals(offscreenCanvas.height, 0);
     40 }, "Test that offscreenCanvas's size is correct after being transferred to a worker.");
     41 
     42 
     43 test(function() {
     44    function testException(contextType) {
     45        var worker = makeWorker(document.getElementById("myWorker").textContent);
     46        var offscreenCanvas = new OffscreenCanvas(10, 10);
     47        var ctx = offscreenCanvas.getContext(contextType);
     48        assert_throws_dom("InvalidStateError", function() {
     49            worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
     50        });
     51    }
     52    testException('2d');
     53 }, "Test that transfer an OffscreenCanvas that already have a 2d context throws exception.");
     54 
     55 test(function() {
     56    var worker = makeWorker(document.getElementById("myWorker").textContent);
     57    var offscreenCanvas = new OffscreenCanvas(10, 10);
     58    worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
     59    assert_throws_dom("DataCloneError", function() {
     60        worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
     61    });
     62 }, "Test that transfer an OffscreenCanvas twice throws exception.");
     63 
     64 test(function() {
     65    var worker = makeWorker(document.getElementById("myWorker").textContent);
     66    var offscreenCanvas = new OffscreenCanvas(10, 10);
     67    worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
     68    assert_throws_dom("InvalidStateError", function() {
     69        offscreenCanvas.getContext('2d');
     70    });
     71 }, "Test that calling getContext('2d') on a detached OffscreenCanvas throws exception.");
     72 
     73 test(function() {
     74    var worker = makeWorker(document.getElementById("myWorker").textContent);
     75    var offscreenCanvas = new OffscreenCanvas(10, 10);
     76    worker.postMessage({offscreenCanvas}, [offscreenCanvas]);
     77    assert_throws_dom("InvalidStateError", function() {
     78        offscreenCanvas.getContext('webgl');
     79    });
     80 }, "Test that calling getContext('webgl') on a detached OffscreenCanvas throws exception.");
     81 
     82 </script>