content/canvas/test/test_2d.imageData.get.source.negative.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.imageData.get.source.negative</title>
   3 <!-- Testing: getImageData() works with negative width and height -->
   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 ctx.fillStyle = '#000';
  21 ctx.fillRect(0, 0, 100, 50);
  22 ctx.fillStyle = '#fff';
  23 ctx.fillRect(20, 10, 60, 10);
  24
  25 var imgdata1 = ctx.getImageData(85, 25, -10, -10);
  26 ok(imgdata1.data[0] === 0, "imgdata1.data[\""+(0)+"\"] === 0");
  27 ok(imgdata1.data[1] === 0, "imgdata1.data[\""+(1)+"\"] === 0");
  28 ok(imgdata1.data[2] === 0, "imgdata1.data[\""+(2)+"\"] === 0");
  29 ok(imgdata1.data[3] === 255, "imgdata1.data[\""+(3)+"\"] === 255");
  30 ok(imgdata1.data[imgdata1.length-4+0] === 255, "imgdata1.data[imgdata1.length-4+0] === 255");
  31 ok(imgdata1.data[imgdata1.length-4+1] === 255, "imgdata1.data[imgdata1.length-4+1] === 255");
  32 ok(imgdata1.data[imgdata1.length-4+2] === 255, "imgdata1.data[imgdata1.length-4+2] === 255");
  33 ok(imgdata1.data[imgdata1.length-4+3] === 255, "imgdata1.data[imgdata1.length-4+3] === 255");
  34
  35 var imgdata2 = ctx.getImageData(0, 0, -1, -1);
  36 ok(imgdata2.data[0] === 0, "imgdata2.data[\""+(0)+"\"] === 0");
  37 ok(imgdata2.data[1] === 0, "imgdata2.data[\""+(1)+"\"] === 0");
  38 ok(imgdata2.data[2] === 0, "imgdata2.data[\""+(2)+"\"] === 0");
  39 ok(imgdata2.data[3] === 0, "imgdata2.data[\""+(3)+"\"] === 0");
  40
  41 } catch (e) {
  42     _thrown_outer = true;
  43 }
  44 todo(!_thrown_outer, 'should not throw exception');
  45
  46 SimpleTest.finish();
  47
  48 });
  49 </script>
  50