content/canvas/test/test_2d.drawImage.animated.gif.html

   1 <!DOCTYPE HTML>
   2 <title>Canvas test: 2d.drawImage.animated.gif</title>
   3 <!-- Testing: drawImage() of an animated GIF draws the first frame -->
   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 function isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
  11     var pixel = ctx.getImageData(x, y, 1, 1);
  12     var pr = pixel.data[0],
  13         pg = pixel.data[1],
  14         pb = pixel.data[2],
  15         pa = pixel.data[3];
  16     ok(r-d <= pr && pr <= r+d &&
  17        g-d <= pg && pg <= g+d &&
  18        b-d <= pb && pb <= b+d &&
  19        a-d <= pa && pa <= a+d,
  20        "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
  21 }
  22 function todo_isPixel(ctx, x,y, r,g,b,a, pos, colour, d) {
  23     var pixel = ctx.getImageData(x, y, 1, 1);
  24     var pr = pixel.data[0],
  25         pg = pixel.data[1],
  26         pb = pixel.data[2],
  27         pa = pixel.data[3];
  28     todo(r-d <= pr && pr <= r+d &&
  29        g-d <= pg && pg <= g+d &&
  30        b-d <= pb && pb <= b+d &&
  31        a-d <= pa && pa <= a+d,
  32        "pixel "+pos+" is "+pr+","+pg+","+pb+","+pa+"; expected "+colour+" +/- "+d);
  33 }
  34 function deferTest() {
  35     _deferred = true;
  36 }
  37 function wrapFunction(f) {
  38     return function () {
  39         f.apply(null, arguments);
  40         SimpleTest.finish();
  41     }
  42 }
  43
  44 SimpleTest.waitForExplicitFinish();
  45 MochiKit.DOM.addLoadEvent(function () {
  46
  47 var canvas = document.getElementById('c');
  48 var ctx = canvas.getContext('2d');
  49
  50 deferTest();
  51 setTimeout(wrapFunction(function () {
  52     ctx.drawImage(document.getElementById('anim-gr.gif'), 0, 0);
  53     todo_isPixel(ctx, 50,25, 0,255,0,255, "50,25", "0,255,0,255", 2);
  54 }), 500);
  55
  56
  57 });
  58 </script>
  59 <img src="image_anim-gr.gif" id="anim-gr.gif" class="resource">
  60