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1<html>
2<head>
3<script type="text/javascript">
4var canvas;
5var w, h;
6var gl;
7var extension;
8
9var alreadySetAutomationId = false;
10
11function 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
32function testContextLost(e) {
33  e.preventDefault();
34  if (extension) {
35    setTimeout(function() {
36      extension.restoreContext();
37      extension = null;
38    }, 0);
39  }
40}
41
42function 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
62function 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
85function 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>
112