gl-bindAttribLocation-repeated.html

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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

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<!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>

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