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

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.imageData.object.readonly</title>
   3 <!-- Testing: ImageData objects properties are read-only -->
   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 var w = imgdata.width;
  19 var h = imgdata.height;
  20 var d = imgdata.data;
  21 imgdata.width = 123;
  22 imgdata.height = 123;
  23 imgdata.data = [100,100,100,100];
  24 todo(imgdata.width === w, "imgdata.width === w");
  25 todo(imgdata.height === h, "imgdata.height === h");
  26 todo(imgdata.data === d, "imgdata.data === d");
  27 todo(imgdata.data[0] === 0, "imgdata.data[\""+(0)+"\"] === 0");
  28 todo(imgdata.data[1] === 0, "imgdata.data[\""+(1)+"\"] === 0");
  29 todo(imgdata.data[2] === 0, "imgdata.data[\""+(2)+"\"] === 0");
  30 todo(imgdata.data[3] === 0, "imgdata.data[\""+(3)+"\"] === 0");
  31
  32 SimpleTest.finish();
  33
  34 });
  35 </script>
  36