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<!--

Copyright (c) 2019 The Khronos Group Inc.

Use of this source code is governed by an MIT-style license that can be

found in the LICENSE.txt file.

-->

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

<title>WebGL2 Canvas Context Mode Conformance Tests</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";

description("This test ensures WebGL 2.0 implementations respect the canvas's context mode.");

debug("");

assertMsg(window.WebGLRenderingContext,

          "WebGL2RenderingContext should be a member of window");

assertMsg('WebGL2RenderingContext' in window,

          "WebGL2RenderingContext should be 'in' window");

function testContextMode(mode, altMode) {

  debug("Testing " + mode + " context type");

  let c = document.createElement('canvas');

  c.width = 2;

  c.height = 2;

  let gl = c.getContext(mode);

  assertMsg(c.getContext(mode) == gl,

            "Canvas.getContext('" + mode + "') should return the same value every time");

  try {

    assertMsg(c.getContext(altMode) == null,

              "Canvas.getContext('" + altMode + "') after getContext('" + mode + "') should return null");

  } catch (e) {

    testFailed("Canvas.getContext('" + altMode + "') after getContext('" + mode + "') should not throw an exception");

testContextMode('webgl2', 'webgl');

testContextMode('webgl', 'webgl2');

debug("");

var successfullyParsed = true;

</script>

<script src="../../js/js-test-post.js"></script>

</body>

</html>