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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL2 getExtension while PBO bound stability conformance test.</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";

var wtu = WebGLTestUtils;

function runTest(extension_name) {
  debug("");
  debug("getExtension('" + extension_name + "') while PIXEL_UNPACK_BUFFER bound should be stable");

  var gl = wtu.create3DContext(null, undefined, 2);
  if (!gl) {
    testFailed("Fail to get a WebGL context");
    return;
  }

  var pbo = gl.createBuffer();
  gl.bindBuffer(gl.PIXEL_UNPACK_BUFFER, pbo);
  var ext = gl.getExtension('EXT_color_buffer_float');
  var gl_texture_float_linear = gl.getExtension(extension_name);
  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "Late-enable of extension should succeed");
  if (pbo != gl.getParameter(gl.PIXEL_UNPACK_BUFFER_BINDING)) {
      testFailed("Fail to maintain PIXEL_UNPACK_BUFFER binding when enabling extension " + extension_name);
  }
}

function runTests() {
  debug("This is a regression test for <a href='https://bugs.chromium.org/p/chromium/issues/detail?id=641643'>Chromium Issue 641642</a>");
  runTest('EXT_color_buffer_float');
  runTest('OES_texture_float_linear');
}

runTests();

debug("");
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
