canvas-fill-rule.html | Explore in Territory

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<body>
<script>

var tmpimg = document.createElement('canvas');
tmpimg.width = 200;
tmpimg.height = 200;
ctx = tmpimg.getContext('2d');

// Create the image for blending test with images.
var img = document.createElement('canvas');
img.width = 100;
img.height = 100;
var imgCtx = img.getContext('2d');

function checkResult(expectedColors, sigma) {
    var pixel = ctx.getImageData(50, 50, 1, 1).data;
    for (var i = 0; i < 4; i++)
        assert_approx_equals(pixel[i], expectedColors[i], sigma);
}

test(function(t) {
    // Testing default fill
    ctx.fillStyle = 'rgb(255,0,0)';
    ctx.beginPath();
    ctx.fillRect(0, 0, 100, 100);
    ctx.fillStyle = 'rgb(0,255,0)';
    ctx.beginPath();
    ctx.rect(0, 0, 100, 100);
    ctx.rect(25, 25, 50, 50);
    ctx.fill();
    checkResult([0, 255, 0, 255], 5);                        

    // Testing nonzero fill
    ctx.fillStyle = 'rgb(255,0,0)';
    ctx.beginPath();
    ctx.fillRect(0, 0, 100, 100);
    ctx.fillStyle = 'rgb(0,255,0)';
    ctx.beginPath();
    ctx.rect(0, 0, 100, 100);
    ctx.rect(25, 25, 50, 50);
    ctx.fill('nonzero');
    checkResult([0, 255, 0, 255], 5);
    
    // Testing evenodd fill
    ctx.fillStyle = 'rgb(255,0,0)';
    ctx.beginPath();
    ctx.fillRect(0, 0, 100, 100);
    ctx.fillStyle = 'rgb(0,255,0)';
    ctx.beginPath();
    ctx.rect(0, 0, 100, 100);
    ctx.rect(25, 25, 50, 50);
    ctx.fill('evenodd');
    checkResult([255, 0, 0, 255], 5);
}, "Series of tests to ensure correct results of the winding rule.");
</script>
</body>
chromium/third_party/blink/web_tests/fast/canvas/canvas-fill-rule.html
