<!--
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>WebGL BindBuffer 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>
<canvas id="example" width="40" height="40" style="width: 40px; height: 40px;"></canvas>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description("Checks a buffer can only be bound to 1 target.");

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

var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("example");
if (!gl) {
  testFailed("context does not exist");
} else {
  testPassed("context exists");

  debug("");

  var buf = gl.createBuffer();
  gl.bindBuffer(gl.ARRAY_BUFFER, buf);
  wtu.glErrorShouldBe(gl, gl.NO_ERROR,
            "should be able to bind array buffer.");
  gl.bindBuffer(gl.ARRAY_BUFFER, null);
  wtu.glErrorShouldBe(gl, gl.NO_ERROR,
            "should be able to unbind array buffer.");
  gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, buf);
  wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
            "should get INVALID_OPERATION if attempting to bind array buffer to different target");

  var buf = gl.createBuffer();
  gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, buf);
  wtu.glErrorShouldBe(gl, gl.NO_ERROR,
            "should be able to bind element array buffer.");
  gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, null);
  wtu.glErrorShouldBe(gl, gl.NO_ERROR,
            "should be able to unbind element array buffer.");
  gl.bindBuffer(gl.ARRAY_BUFFER, buf);
  wtu.glErrorShouldBe(gl, gl.INVALID_OPERATION,
            "should get INVALID_OPERATION if attempting to bind element array buffer to different target");
}

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

</body>
</html>

