third_party/web_platform_tests/2dcontext/pixel-manipulation/2d.imageData.get.order.rows.html

<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by 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="/common/canvas-tests.js"></script>
<link rel="stylesheet" href="/common/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>