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chromium/third_party/blink/web_tests/external/wpt/html/canvas/element/pixel-manipulation/2d.imageData.get.order.rows.html 

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.imageData.get.order.rows</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.imageData.get.order.rows</h1>
<p class="desc">getImageData() returns topmost rows first</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("getImageData() returns topmost rows first");
_addTest(function(canvas, ctx) {

  ctx.fillStyle = '#fff';
  ctx.fillRect(0, 0, 100, 50);
  ctx.fillStyle = '#000';
  ctx.fillRect(0, 0, 100, 2);
  var imgdata = ctx.getImageData(0, 0, 10, 10);
  _assertSame(imgdata.data[0], 0, "imgdata.data[\""+(0)+"\"]", "0");
  _assertSame(imgdata.data[Math.floor(imgdata.width/2*4)], 0, "imgdata.data[Math.floor(imgdata.width/2*4)]", "0");
  _assertSame(imgdata.data[(imgdata.height/2)*imgdata.width*4], 255, "imgdata.data[(imgdata.height/2)*imgdata.width*4]", "255");

});
</script>