third_party/WebKit/LayoutTests/fast/canvas/webgl/WebGLContextEvent.html

   1 <html>
   2 <head>
   3 <script src="../../../resources/js-test.js"></script>
   4 <script src="resources/webgl-test.js"></script>
   5 <script src="resources/webgl-test-utils.js"></script>
   6 <script>
   7
   8 var evt;
   9 var canvas;
  10 var context;
  11 var extension;
  12
  13 function createNewCanvas()
  14 {
  15     canvas = document.createElement("canvas");
  16     canvas.width = 1;
  17     canvas.height = 1;
  18
  19     context = WebGLTestUtils.create3DContext(canvas);
  20     extension = context.getExtension("WEBGL_lose_context");
  21     if (!extension) {
  22         debug("Could not find the WEBGL_lose_context extension.");
  23         return;
  24     }
  25 }
  26
  27 function runTest1()
  28 {
  29     if (window.initNonKhronosFramework)
  30         window.initNonKhronosFramework(true);
  31     createNewCanvas();
  32     canvas.addEventListener("webglcontextlost", function(e) {
  33         evt = e;
  34         debug("Test that the event passed to a listener of webglcontextlost is a WebGLContextEvent.")
  35         shouldBe("evt.toString()", "'[object WebGLContextEvent]'");
  36         shouldBe("evt.statusMessage", "''");
  37         // Start the next test when event dispatch has finished.
  38         setTimeout(function() {
  39           runTest2();
  40         }, 0);
  41     }, false);
  42     extension.loseContext();
  43 }
  44
  45 function runTest2()
  46 {
  47     createNewCanvas();
  48     canvas.addEventListener("webglcontextlost", function(e) {
  49         e.preventDefault();
  50         // Restore the context after event dispatch has finished.
  51         setTimeout(function() {
  52           // Because context restoration is specified as being asynchronous, we can not verify
  53           // that the GL error state is empty here.
  54           extension.restoreContext();
  55         }, 0);
  56     }, false);
  57     canvas.addEventListener("webglcontextrestored", function(e) {
  58         evt = e;
  59         shouldBe("context.getError()", "context.NO_ERROR");
  60         debug("Test that the event passed to a listener of webglcontextrestored is a WebGLContextEvent.")
  61         shouldBe("evt.toString()", "'[object WebGLContextEvent]'");
  62         shouldBe("evt.statusMessage", "''");
  63
  64         setTimeout(finish, 0);
  65     }, false);
  66     extension.loseContext();
  67 }
  68
  69 function finish() {
  70     finishJSTest();
  71 }
  72
  73 </script>
  74
  75 </head>
  76 <body onload="runTest1()">
  77 <div id="description"></div>
  78 <div id="console"></div>
  79 <canvas id="canvas">
  80 </body>
  81 </html>