canvas-ellipse.html | Explore in Territory

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<body>
<script>
test(function(t) {
    var canvas = document.createElement('canvas');
    document.body.appendChild(canvas);
    canvas.setAttribute('width', '400');
    canvas.setAttribute('height', '400');
    var ctx = canvas.getContext('2d');
    
    ctx.fillStyle="rgba(255, 255, 255, 1.0)";
    ctx.fillRect(0, 0, 400, 400);
    
    ctx.strokeStyle="rgba(0, 0, 0, 1.0)";
    ctx.lineWidth = 10;
    ctx.beginPath();
    ctx.moveTo(0, 100);
    ctx.ellipse(200, 200, 100, 150, Math.PI / 9, -Math.PI, Math.PI * 5 / 9, false);
    ctx.lineTo(0, 300);
    ctx.stroke();
    
    var imageData, data;
    
    // Verify the method must add a straight line from the last point in the subpath
    // to the start point of the ellipse.
    imageData = ctx.getImageData(5, 103, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(49, 130, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(103, 163, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(36, 108, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 255);
    
    // Verify ellipse API draws well.
    imageData = ctx.getImageData(101, 179, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 255);
    
    imageData = ctx.getImageData(119, 132, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(260, 62, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(301, 122, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(273, 272, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(169, 344, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(196, 362, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 255);
    
    // Verify the last point of ellipse is the start point of the next subpath.
    imageData = ctx.getImageData(128, 331, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(65, 315, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(9, 302, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 0);
    
    imageData = ctx.getImageData(58, 300, 1, 1);
    data = imageData.data;
    assert_equals(data[0], 255);    
}, "This test checks ellipse API in canvas v5");
</script>
</body>
chromium/third_party/blink/web_tests/fast/canvas/canvas-ellipse.html
