summaryrefslogtreecommitdiffstats
path: root/testing/web-platform/tests/html/canvas/element/pixel-manipulation/2d.imageData.get.order.alpha.html
blob: e5b57f650e2197193f7c86572d8afa5c4b520dae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.imageData.get.order.alpha</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.alpha</h1>
<p class="desc">getImageData() returns A in the fourth component</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 A in the fourth component");
_addTest(function(canvas, ctx) {

  ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
  ctx.fillRect(0, 0, 100, 50);
  var imgdata = ctx.getImageData(0, 0, 10, 10);
  _assert(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200");
  _assert(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100");

});
</script>