content/canvas/test/test_2d.imageData.object.round.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.imageData.object.round</title>
   3 <!-- Testing: ImageData.data rounds numbers with convertToIntegerTiesToEven -->
   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.getImageData(0, 0, 10, 10);
  18 imgdata.data[0] = 0.499;
  19 todo(imgdata.data[0] === 0, "imgdata.data[\""+(0)+"\"] === 0");
  20 imgdata.data[0] = 0.5;
  21 todo(imgdata.data[0] === 0, "imgdata.data[\""+(0)+"\"] === 0");
  22 imgdata.data[0] = 0.501;
  23 todo(imgdata.data[0] === 1, "imgdata.data[\""+(0)+"\"] === 1");
  24 imgdata.data[0] = 1.499;
  25 todo(imgdata.data[0] === 1, "imgdata.data[\""+(0)+"\"] === 1");
  26 imgdata.data[0] = 1.5;
  27 todo(imgdata.data[0] === 2, "imgdata.data[\""+(0)+"\"] === 2");
  28 imgdata.data[0] = 1.501;
  29 todo(imgdata.data[0] === 2, "imgdata.data[\""+(0)+"\"] === 2");
  30 imgdata.data[0] = 2.5;
  31 todo(imgdata.data[0] === 2, "imgdata.data[\""+(0)+"\"] === 2");
  32 imgdata.data[0] = 3.5;
  33 todo(imgdata.data[0] === 4, "imgdata.data[\""+(0)+"\"] === 4");
  34 imgdata.data[0] = 252.5;
  35 todo(imgdata.data[0] === 252, "imgdata.data[\""+(0)+"\"] === 252");
  36 imgdata.data[0] = 253.5;
  37 todo(imgdata.data[0] === 254, "imgdata.data[\""+(0)+"\"] === 254");
  38 imgdata.data[0] = 254.5;
  39 todo(imgdata.data[0] === 254, "imgdata.data[\""+(0)+"\"] === 254");
  40
  41 SimpleTest.finish();
  42
  43 });
  44 </script>
  45