content/test/data/gpu/webgl.html

   1 <html>
   2 <head>
   3 <script type="text/javascript">
   4 var canvas;
   5 var w, h;
   6 var gl;
   7 var extension;
   8
   9 var alreadySetAutomationId = false;
  10
  11 function testHorizontalBands() {
  12   gl.enable(gl.SCISSOR_TEST);
  13
  14   gl.clearColor(1, 0, 0, 1);
  15   gl.scissor(0, 0, w, h/2);
  16   gl.clear(gl.COLOR_BUFFER_BIT);
  17
  18   gl.clearColor(0, 1, 0, 1);
  19   gl.scissor(0, h/2, w, h/2);
  20   gl.clear(gl.COLOR_BUFFER_BIT);
  21
  22   gl.disable(gl.SCISSOR_TEST);
  23
  24   var size = w * h * 4;
  25   var array = new Uint8Array(size);
  26   gl.readPixels(0, 0, w, h, gl.RGBA, gl.UNSIGNED_BYTE, array);
  27
  28   return array[0] == 255 && array[1] == 0 &&
  29       array[size - 4] == 0 && array[size - 3] == 255;
  30 }
  31
  32 function testContextLost(e) {
  33   e.preventDefault();
  34   if (extension) {
  35     setTimeout(function() {
  36       extension.restoreContext();
  37       extension = null;
  38     }, 0);
  39   }
  40 }
  41
  42 function testContextRestored() {
  43   gl = canvas.getContext("experimental-webgl");
  44   if (!gl || gl.isContextLost()) {
  45     // Might just be blocked because of infobar.
  46     return;
  47   }
  48   gl.clearColor(0, 0, 1, 1);
  49   gl.clear(gl.COLOR_BUFFER_BIT);
  50
  51   var a = new Uint8Array(w * h * 4);
  52   gl.readPixels(0, 0, w, h, gl.RGBA, gl.UNSIGNED_BYTE, a);
  53
  54   if (!alreadySetAutomationId)
  55     window.domAutomationController.setAutomationId(1);
  56   if (a[0] == 0 && a[1] == 0 && a[2] == 255)
  57     window.domAutomationController.send("SUCCESS");
  58   else
  59     window.domAutomationController.send("FAILED");
  60 }
  61
  62 function contextLostTest(kind)
  63 {
  64   switch (kind) {
  65     case "WEBGL_lose_context": {
  66       extension = gl.getExtension("WEBKIT_WEBGL_lose_context") ||
  67                   gl.getExtension("WEBGL_lose_context");
  68       extension.loseContext();
  69       break;
  70     }
  71     case "kill":
  72       // nothing -- the browser test navigates to about:gpucrash and kills
  73       // the GPU process.
  74       break;
  75     case "kill_after_notification":
  76       // The browser test waits for notification from the page that it
  77       // has been loaded before navigating to about:gpucrash.
  78       window.domAutomationController.setAutomationId(1);
  79       alreadySetAutomationId = true;
  80       window.domAutomationController.send("LOADED");
  81       break;
  82   }
  83 }
  84
  85 function onLoad() {
  86   canvas = document.getElementById("canvas1");
  87   w = canvas.width;
  88   h = canvas.height;
  89   if (!canvas)
  90     return;
  91   canvas.addEventListener("webglcontextlost", testContextLost, false);
  92   canvas.addEventListener("webglcontextrestored", testContextRestored, false);
  93
  94   gl = canvas.getContext("experimental-webgl");
  95   if (!gl)
  96     return;
  97
  98   if (!testHorizontalBands())
  99     return;
 100
 101   var query = /query=(.*)/.exec(window.location.href);
 102   if (query)
 103     contextLostTest(query[1]);
 104 }
 105 </script>
 106 </head>
 107 <body onload="onLoad()">
 108 <canvas id="canvas1" width="16px" height="32px">
 109 </canvas>
 110 </body>
 111 </html>