<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
    <body>
        <canvas id="canvas1" width=100px height=100px></canvas>
        <video id="video" autoplay width=100px height=100px></video>
        <canvas id="canvas2" width=100px height=100px></canvas>
        <script src="../../../resources/testharness.js"></script>
        <script src="../../../resources/testharnessreport.js"></script>
        <script>

var canvas1 = document.getElementById("canvas1");
var canvas2 = document.getElementById("canvas2");
var video = document.getElementById("video");

var previousTrackSampleCount = 0
function validateCanvas(resolve, reject)
{
    try {
        if (window.internals) {
             assert_true((internals.trackVideoSampleCount - previousTrackSampleCount) <= 1, "got too much internals.trackVideoSampleCount");
             previousTrackSampleCount = internals.trackVideoSampleCount;
        }
        canvas2.getContext("2d").drawImage(video, 0 ,0);
        assert_array_equals(canvas2.getContext("2d").getImageData(0 ,0, 100, 100).data, canvas2.getContext("2d").getImageData(0, 0, 100, 100).data);
    } catch(e) {
        reject(e);
        return;
    }
    setTimeout(() => { validateCanvas(reject, resolve); }, 5);
}

function checkCanvas(canvas, stream)
{
    return new Promise((resolve, reject) => {
        video.srcObject = stream;
        video.onplay = () => {
            if (window.internals)
                previousTrackSampleCount = internals.trackVideoSampleCount;
            validateCanvas(resolve, reject);
            setTimeout(resolve, 500);
        }
    });
}

var cptr = 0;
function printLine()
{
    var context = canvas1.getContext("2d");
    context.fillStyle = "red";
    for (var i = 0 ; i < 100; ++i)
        context.fillRect(0, 0, 100, 100);

    cptr += 5;
    if (cptr > 255)
        cptr = 0;
    context.fillStyle="rgb(0, " + cptr + ", 0)";
    context.fillRect(0, 0, 100, 100);
    setTimeout(printLine, 100);
}

promise_test((test) => {
    var stream = canvas1.captureStream();

    assert_false(!!stream.getAudioTracks().length);
    assert_true(stream.getVideoTracks().length == 1);

    if (window.internals)
        internals.observeMediaStreamTrack(stream.getVideoTracks()[0]);

    promise = checkCanvas(canvas1, stream);

    printLine();

    return promise;
}, "captureStream with 2d context drawing");
        </script>
    </body>
</html>