tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

test_backbuffer_channels.html (3128B)

      1 <!DOCTYPE HTML>
      2 <title>WebGL test: bug 958723</title>
      3 <script src="/tests/SimpleTest/SimpleTest.js"></script>
      4 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
      5 <script src="driver-info.js"></script>
      6 <script src="webgl-util.js"></script>
      7 <body>
      8 <script>
      9 
     10 function TestAttribs(attribs) {
     11  ok(true, 'Testing attribs: ' + JSON.stringify(attribs));
     12  var canvas = document.createElement('canvas');
     13  var gl = canvas.getContext('experimental-webgl', attribs);
     14  ok(gl, 'No tested attribs should result in failure to create a context');
     15  if (!gl)
     16    return;
     17 
     18  var actual = gl.getContextAttributes();
     19 
     20  ok(actual.alpha == attribs.alpha,
     21     'Resulting `alpha` should match request.');
     22  ok(actual.premultipliedAlpha == attribs.premultipliedAlpha,
     23     'Resulting `premultipliedAlpha` should match request.');
     24  ok(actual.preserveDrawingBuffer == attribs.preserveDrawingBuffer,
     25     'Resulting `preserveDrawingBuffer` should match request.');
     26 
     27  // "The depth, stencil and antialias attributes, when set to true, are
     28  // requests, not requirements."
     29  if (!attribs.antialias) {
     30    ok(!actual.antialias, 'No `antialias` if not requested.');
     31  }
     32  if (!attribs.depth) {
     33    ok(!actual.depth, 'No `depth` if not requested.');
     34  }
     35  if (!attribs.stencil) {
     36    ok(!actual.stencil, 'No `stencil` if not requested.');
     37  }
     38 
     39  var hasAlpha = !!gl.getParameter(gl.ALPHA_BITS);
     40  var hasDepth = !!gl.getParameter(gl.DEPTH_BITS);
     41  var hasStencil = !!gl.getParameter(gl.STENCIL_BITS);
     42  var hasAntialias = !!gl.getParameter(gl.SAMPLES);
     43 
     44  ok(hasAlpha == actual.alpha, 'Bits should match `alpha` attrib.');
     45  ok(hasAntialias == actual.antialias, 'Bits should match `antialias` attrib.');
     46  ok(hasDepth == actual.depth, 'Bits should match `depth` attrib.');
     47  ok(hasStencil == actual.stencil, 'Bits should match `stencil` attrib.');
     48 }
     49 
     50 function CloneAttribs(attribs) {
     51  return {
     52    alpha: attribs.alpha,
     53    antialias: attribs.antialias,
     54    depth: attribs.depth,
     55    premultipliedAlpha: attribs.premultipliedAlpha,
     56    preserveDrawingBuffer: attribs.preserveDrawingBuffer,
     57    stencil: attribs.stencil,
     58  };
     59 }
     60 
     61 function SplitForAttrib(list, attrib) {
     62  var ret = [];
     63 
     64  for (var i in list) {
     65    var cur = list[i];
     66    if (cur[attrib])
     67      throw 'Attrib is already true.';
     68 
     69    var clone = CloneAttribs(cur);
     70    clone[attrib] = true;
     71 
     72    ret.push(cur);
     73    ret.push(clone);
     74  }
     75 
     76  return ret;
     77 }
     78 
     79 function GenAttribList() {
     80  var base = {
     81    alpha: false,
     82    antialias: false,
     83    depth: false,
     84    premultipliedAlpha: false,
     85    preserveDrawingBuffer: false,
     86    stencil: false,
     87  };
     88  var list = [base];
     89  list = SplitForAttrib(list, 'alpha');
     90  list = SplitForAttrib(list, 'antialias');
     91  list = SplitForAttrib(list, 'depth');
     92  list = SplitForAttrib(list, 'premultipliedAlpha');
     93  list = SplitForAttrib(list, 'preserveDrawingBuffer');
     94  list = SplitForAttrib(list, 'stencil');
     95 
     96  if (list.length != 1<<6)
     97    throw 'Attribs list length wrong: ' + list.length;
     98 
     99  return list;
    100 }
    101 
    102 var list = GenAttribList();
    103 for (var i in list) {
    104  var attribs = list[i];
    105  TestAttribs(attribs);
    106 }
    107 
    108 ok(true, 'Test complete.');
    109 
    110 </script>