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chromium/third_party/blink/web_tests/external/wpt/html/canvas/element/path-objects/2d.path.rect.winding.html 

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.path.rect.winding</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/html/canvas/resources/canvas-tests.js"></script>
<link rel="stylesheet" href="/html/canvas/resources/canvas-tests.css">
<body class="show_output">

<h1>2d.path.rect.winding</h1>
<p class="desc"></p>


<p class="output">Actual output:</p>
<canvas id="c" class="output" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>

<ul id="d"></ul>
<script>
var t = async_test("");
_addTest(function(canvas, ctx) {

  ctx.fillStyle = '#0f0';
  ctx.fillRect(0, 0, 100, 50);
  ctx.beginPath();
  ctx.fillStyle = '#f00';
  ctx.rect(0, 0, 50, 50);
  ctx.rect(100, 50, -50, -50);
  ctx.rect(0, 25, 100, -25);
  ctx.rect(100, 25, -100, 25);
  ctx.fill();
  _assertPixel(canvas, 25,12, 0,255,0,255);
  _assertPixel(canvas, 75,12, 0,255,0,255);
  _assertPixel(canvas, 25,37, 0,255,0,255);
  _assertPixel(canvas, 75,37, 0,255,0,255);

});
</script>