dom/canvas/test/test_offscreencanvas_basic_webgl.html

   1 <!DOCTYPE HTML>
   2 <html>
   3 <head>
   4 <title>WebGL in OffscreenCanvas</title>
   5 <script src="/tests/SimpleTest/SimpleTest.js"></script>
   6 <link rel="stylesheet" href="/tests/SimpleTest/test.css">
   7 </head>
   8 <body>
   9 <canvas id="c" width="64" height="64"></canvas>
  10 <canvas id="c-ref" width="64" height="64"></canvas>
  11 <script>
  12
  13 SimpleTest.waitForExplicitFinish();
  14
  15 function testToDataURL() {
  16   // testing toDataURL
  17   // Fill c-ref with green color.
  18   var c = document.getElementById("c-ref");
  19   var ctx = c.getContext("2d");
  20   ctx.rect(0, 0, 64, 64);
  21   ctx.fillStyle = "#00FF00";
  22   ctx.fill();
  23   var htmlCanvas = document.getElementById("c");
  24   ok(c.toDataURL() == htmlCanvas.toDataURL(), "toDataURL should return a 64x64 green square");
  25 }
  26
  27 function runTest() {
  28
  29   var htmlCanvas = document.getElementById("c");
  30   var worker = new Worker("offscreencanvas.js");
  31
  32   ok(htmlCanvas, "Should have HTML canvas element");
  33   ok(worker, "Web worker successfully created");
  34
  35   worker.onmessage = function(evt) {
  36     var msg = evt.data || {};
  37     if (msg.type == "test") {
  38       ok(msg.result, msg.name);
  39     }
  40     if (msg.type == "finish") {
  41       testToDataURL();
  42       worker.terminate();
  43       SimpleTest.finish();
  44     }
  45   }
  46
  47   ok(htmlCanvas.transferControlToOffscreen, "HTMLCanvasElement has transferControlToOffscreen function");
  48
  49   var offscreenCanvas = htmlCanvas.transferControlToOffscreen();
  50   ok(offscreenCanvas, "Expected transferControlToOffscreen to succeed");
  51
  52   worker.postMessage({test: 'webgl', canvas: offscreenCanvas}, [offscreenCanvas]);
  53 }
  54
  55 SpecialPowers.pushPrefEnv({'set': [
  56   ['webgl.force-enabled', true],
  57 ]}, runTest);
  58
  59 </script>
  60 </body>
  61 </html>