gl-get-active-attribute.html

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Copyright (c) 2019 The Khronos Group Inc.

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<head>

<meta charset="utf-8">

<title>WebGL getActiveAttrib 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="16" height="16"></canvas>

<div id="description"></div>

<div id="console"></div>

<script id="vshader" type="x-shader/x-vertex">

attribute $type attr0;

void main()

    gl_Position = vec4(0, 0, 0, attr0$access);

</script>

<script id="fshader" type="x-shader/x-fragment">

void main()

    gl_FragColor = vec4(0,1,0,1);

</script>

<script>

"use strict";

description("Tests getActiveAttrib for various types");

var wtu = WebGLTestUtils;

var gl = wtu.create3DContext("example");

var tests = [

{ glType: gl.FLOAT,      size: 1, type: 'float', access: ''},

{ glType: gl.FLOAT_VEC2, size: 1, type: 'vec2',  access: '[1]'},

{ glType: gl.FLOAT_VEC3, size: 1, type: 'vec3',  access: '[2]'},

{ glType: gl.FLOAT_VEC4, size: 1, type: 'vec4',  access: '[3]'},

{ glType: gl.FLOAT_MAT2, size: 1, type: 'mat2',  access: '[1][1]'},

{ glType: gl.FLOAT_MAT3, size: 1, type: 'mat3',  access: '[2][2]'},

{ glType: gl.FLOAT_MAT4, size: 1, type: 'mat4',  access: '[3][3]'},

];

var source = document.getElementById('vshader').text;

var fs = wtu.loadShaderFromScript(gl, 'fshader', gl.FRAGMENT_SHADER);

for (var tt = 0; tt < tests.length; ++tt) {

  var t = tests[tt];

  var vs = wtu.loadShader(

gl,

      source.replace('$type', t.type).replace('$access', t.access),

      gl.VERTEX_SHADER);

  var program = wtu.setupProgram(gl, [vs, fs]);

  wtu.glErrorShouldBe(gl, gl.NO_ERROR, "no errors from setup");

  var numAttribs = gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES);

  var found = false;

  for (var ii = 0; ii < numAttribs; ++ii) {

    var info = gl.getActiveAttrib(program, ii);

    if (info.name == 'attr0') {

      found = true;

      assertMsg(info.type == t.glType,

                "type must be " + wtu.glEnumToString(gl, t.glType) + " was " +

                wtu.glEnumToString(gl, info.type));

      assertMsg(info.size == t.size,

                "size must be " + t.size + ' was ' + info.size);

  if (!found) {

    testFailed("attrib 'attr0' not found");

var successfullyParsed = true;

</script>

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

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