File: 2d.imageData.get.range.html

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<!DOCTYPE html>
<!-- DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. -->
<title>Canvas test: 2d.imageData.get.range</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.range</h1>
<p class="desc">getImageData() returns values in the range [0, 255]</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 values in the range [0, 255]");
_addTest(function(canvas, ctx) {

  ctx.fillStyle = '#000';
  ctx.fillRect(0, 0, 100, 50);
  ctx.fillStyle = '#fff';
  ctx.fillRect(20, 10, 60, 10);
  var imgdata1 = ctx.getImageData(10, 5, 1, 1);
  _assertSame(imgdata1.data[0], 0, "imgdata1.data[\""+(0)+"\"]", "0");
  var imgdata2 = ctx.getImageData(30, 15, 1, 1);
  _assertSame(imgdata2.data[0], 255, "imgdata2.data[\""+(0)+"\"]", "255");

});
</script>