content/canvas/test/test_2d.imageData.get.order.cols.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.imageData.get.order.cols</title>
   3 <!-- Testing: getImageData() returns leftmost columns first -->
   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 ctx.fillStyle = '#fff';
  18 ctx.fillRect(0, 0, 100, 50);
  19 ctx.fillStyle = '#000';
  20 ctx.fillRect(0, 0, 2, 50);
  21 var imgdata = ctx.getImageData(0, 0, 10, 10);
  22 ok(imgdata.data[0] === 0, "imgdata.data[\""+(0)+"\"] === 0");
  23 ok(imgdata.data[Math.round(imgdata.width/2*4)] === 255, "imgdata.data[Math.round(imgdata.width/2*4)] === 255");
  24 ok(imgdata.data[Math.round((imgdata.height/2)*imgdata.width*4)] === 0, "imgdata.data[Math.round((imgdata.height/2)*imgdata.width*4)] === 0");
  25
  26 SimpleTest.finish();
  27
  28 });
  29 </script>
  30