<!--
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 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>
<canvas id="canvas1" style="width: 50px; height: 50px;"> </canvas>
<canvas id="canvas2" style="width: 50px; height: 50px;"> </canvas>
<script>
"use strict";
description("This test ensures WebGL2 implementations interact correctly with the canvas tag.");

debug("");
debug("Canvas.getContext");

function runTest() {
  assertMsg(window.WebGL2RenderingContext,
            "WebGL2RenderingContext should be a member of window");
  assertMsg('WebGL2RenderingContext' in window,
            "WebGL2RenderingContext should be 'in' window");

  const wtu = WebGLTestUtils;
  let canvas2 = document.getElementById("canvas2");
  let gl2 = wtu.create3DContext(canvas2, null, 2);
  if (!gl2) {
    testFailed("Could not fetch WebGL 2.0 context");
    return;
  }
  testPassed("Fetched WebGL2 context successfully");

  debug("Checking WebGL2 context type");
  assertMsg(gl2 instanceof WebGL2RenderingContext,
            "context type should be WebGL2RenderingContext");

  // WebGL1 contexts do not respond to the WebGL2 context type, and vice versa.
  let canvas1 = document.getElementById("canvas1");
  let gl1 = wtu.create3DContext(canvas1, null, 1);
  if (!gl1) {
    testFailed("Could not fetch WebGL 1.0 context");
    return;
  }

  debug("Checking WebGL1 context type");
  assertMsg(gl1 instanceof WebGLRenderingContext,
            "context type should be WebGLRenderingContext");

  let msg1 = "A canvas which has created a WebGL 1.0 context should not return it for a 'webgl2' context request";
  if (canvas1.getContext("webgl2"))
    testFailed(msg1);
  else
    testPassed(msg1);

  let msg2 = "A canvas which has created a WebGL 2.0 context should not return it for a 'webgl' context request";
  if (canvas2.getContext("webgl"))
    testFailed(msg2);
  else
    testPassed(msg2);
}

runTest();
debug("");

var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>

</body>
</html>
