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

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.imageData.create.large - bug 433004</title>
   3 <!-- Testing: createImageData() works for sizes much larger than the canvas -->
   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 _thrown_outer = false;
  18
  19 var imgdata = ctx.createImageData(1000, 2000);
  20 ok(imgdata.data.length == imgdata.width*imgdata.height*4, "imgdata.data.length == imgdata.width*imgdata.height*4");
  21 ok(imgdata.width < imgdata.height, "imgdata.width < imgdata.height");
  22 ok(imgdata.width > 0, "imgdata.width > 0");
  23 var isTransparentBlack = true;
  24 for (var i = 0; i < imgdata.data.length; i += 7813) // check ~1024 points (assuming normal scaling)
  25     if (imgdata.data[i] !== 0)
  26         isTransparentBlack = false;
  27 ok(isTransparentBlack, "isTransparentBlack");
  28
  29 SimpleTest.finish();
  30
  31 });
  32 </script>
  33