<!--
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 Repeated BindAttribLocation 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="50" height="50">
</canvas>
<div id="description"></div>
<div id="console"></div>
<script id="vshader" type="x-shader/x-vertex">
    attribute vec4 vPosition;
    void main()
    {
        gl_Position = vPosition;
    }
</script>

<script id="fshader" type="x-shader/x-fragment">
    void main()
    {
        gl_FragColor = vec4(0.0,1.0,0.0,1.0);
    }
</script>

<script>
"use strict";
description("Test repeated loading of programs involving bindAttribLocation calls");
debug("Regression test for <a href='https://code.google.com/p/chromium/issues/detail?id=510637'>crbug.com/510637</a>");
var wtu = WebGLTestUtils;
var gl = wtu.create3DContext("example");
var g_program;
var g_attribLocation;
function setup(attribIndex) {
  var program = wtu.setupProgram(
      gl, ['vshader', 'fshader'], ['vPosition'], [attribIndex]);
  g_program = program;
  g_attribLocation = attribIndex;
  shouldBe("gl.getAttribLocation(g_program, 'vPosition')", "g_attribLocation");
  return program;
}

var p0 = setup(0);
var p3 = setup(3);
var p1 = setup(1);
// This call fails the getAttribLocation check on some drivers when
// Chrome's program binary cache is enabled. On the affected drivers,
// it returns the bound attribute location from the first binary
// created. Swapping 0 and 1 above will cause it to return 1 rather
// than 0.
p3 = setup(3);

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

</body>
</html>
