content/canvas/test/test_2d.imageData.get.nonpremul.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.imageData.get.nonpremul</title>
   3 <!-- Testing: getImageData() returns non-premultiplied colours -->
   4 <script src="/MochiKit/MochiKit.js"></script>
   5 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   6 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   7 <body>
   8 <canvas id="c" width="100" height="50"><p class="fallback">FAIL (fallback content)</p></canvas>
   9 <script>
  10
  11 SimpleTest.waitForExplicitFinish();
  12 MochiKit.DOM.addLoadEvent(function () {
  13
  14 var canvas = document.getElementById('c');
  15 var ctx = canvas.getContext('2d');
  16
  17 ctx.fillStyle = 'rgba(255, 255, 255, 0.5)';
  18 ctx.fillRect(0, 0, 100, 50);
  19 var imgdata = ctx.getImageData(10, 10, 10, 10);
  20 ok(imgdata.data[0] > 200, "imgdata.data[\""+(0)+"\"] > 200");
  21 ok(imgdata.data[1] > 200, "imgdata.data[\""+(1)+"\"] > 200");
  22 ok(imgdata.data[2] > 200, "imgdata.data[\""+(2)+"\"] > 200");
  23 ok(imgdata.data[3] > 100, "imgdata.data[\""+(3)+"\"] > 100");
  24 ok(imgdata.data[3] < 200, "imgdata.data[\""+(3)+"\"] < 200");
  25
  26 SimpleTest.finish();
  27
  28 });
  29 </script>
  30