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+<!--
+
+/*
+** Copyright (c) 2012 The Khronos Group Inc.
+**
+** Permission is hereby granted, free of charge, to any person obtaining a
+** copy of this software and/or associated documentation files (the
+** "Materials"), to deal in the Materials without restriction, including
+** without limitation the rights to use, copy, modify, merge, publish,
+** distribute, sublicense, and/or sell copies of the Materials, and to
+** permit persons to whom the Materials are furnished to do so, subject to
+** the following conditions:
+**
+** The above copyright notice and this permission notice shall be included
+** in all copies or substantial portions of the Materials.
+**
+** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
+*/
+
+-->
+
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>WebGL Behavior After Alert and Read Pixels Test</title>
+<link rel="stylesheet" href="../resources/js-test-style.css"/>
+<script src="../../devtools/src/debug/webgl-debug.js"></script>
+<script src="../js/js-test-pre.js"></script>
+<script src="../js/webgl-test-utils.js"></script>
+</head>
+<body>
+<canvas id="canvas" width="100" height="100"> </canvas>
+<div id="description">Verify WebGL behavior after an alert and then a readPixels()</div>
+<div id="console"></div>
+<script>
+"use strict";
+
+function checkPixels(buf, width, height, thresh) {
+  for (var yy = 0; yy < height; ++yy) {
+    for (var xx = 0; xx < width; ++xx) {
+      var offset = (yy * width + xx) * 4;
+      if (Math.abs(buf[offset] - 255) > thresh ||
+          Math.abs(buf[offset + 1] - 0) > thresh ||
+          Math.abs(buf[offset + 2] - 0) > thresh) {
+        testFailed("Checking pixels");
+        return false;
+      }
+    }
+  }
+  testPassed("Checking pixels");
+  return true;
+}
+
+var wtu = WebGLTestUtils;
+var gl = wtu.create3DContext("canvas");
+gl.clearColor(1, 0, 0, 1);
+gl.clear(gl.COLOR_BUFFER_BIT);
+wtu.glErrorShouldBe(gl, gl.NO_ERROR, "setup should succeed");
+
+wtu.checkCanvas(gl, [255, 0, 0, 255], undefined, 3);
+
+alert("Click me to continue");
+
+wtu.glErrorShouldBe(gl, gl.NO_ERROR, "setup should succeed");
+wtu.checkCanvas(gl, [255, 0, 0, 255], undefined, 3);
+
+alert("Click me to continue");
+
+gl.clearColor(1, 0, 0, 1);
+gl.clear(gl.COLOR_BUFFER_BIT);
+wtu.checkCanvas(gl, [255, 0, 0, 255], undefined, 3);
+
+debug("");
+var successfullyParsed = true;
+</script>
+<script src="../js/js-test-post.js"></script>
+
+</body>
+</html>