content/canvas/test/test_2d.imageData.create.initial.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.imageData.create.initial - bug 433004</title>
   3 <!-- Testing: createImageData() returns transparent black data of the right size -->
   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 var imgdata = ctx.createImageData(10, 20);
  18 ok(imgdata.data.length == imgdata.width*imgdata.height*4, "imgdata.data.length == imgdata.width*imgdata.height*4");
  19 ok(imgdata.width < imgdata.height, "imgdata.width < imgdata.height");
  20 ok(imgdata.width > 0, "imgdata.width > 0");
  21 var isTransparentBlack = true;
  22 for (var i = 0; i < imgdata.data.length; ++i)
  23     if (imgdata.data[i] !== 0)
  24         isTransparentBlack = false;
  25 ok(isTransparentBlack, "isTransparentBlack");
  26
  27 SimpleTest.finish();
  28
  29 });
  30 </script>
  31