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

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.imageData.create.tiny - bug 433004</title>
   3 <!-- Testing: createImageData() works for sizes smaller than one pixel -->
   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 try {
  19
  20 var imgdata = ctx.createImageData(0.0001, 0.0001);
  21 ok(imgdata.data.length == imgdata.width*imgdata.height*4, "imgdata.data.length == imgdata.width*imgdata.height*4");
  22 ok(imgdata.width == 1, "imgdata.width == 1");
  23 ok(imgdata.height == 1, "imgdata.height == 1");
  24 var isTransparentBlack = true;
  25 for (var i = 0; i < imgdata.data.length; ++i)
  26     if (imgdata.data[i] !== 0)
  27         isTransparentBlack = false;
  28 ok(isTransparentBlack, "isTransparentBlack");
  29
  30 } catch (e) {
  31     _thrown_outer = true;
  32 }
  33 todo(!_thrown_outer, 'should not throw exception');
  34
  35 SimpleTest.finish();
  36
  37 });
  38 </script>
  39