non-existent-varying.html

Enable keyboard shortcuts

<!--

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 Transform Feedback 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>

<script id="vshader" type="x-shader/x-vertex">#version 300 es

in vec3 position;

void main()

    gl_Position = vec4(position, 1);

</script>

<script id="fshader" type="x-shader/x-fragment">#version 300 es

precision mediump float;

out vec4 color;

void main()

    color = vec4(0);

</script>

<script>

"use strict";

description("Test that specifying non-existent varyings for transform feedback causes the program to fail to link. This test covers an ANGLE bug.");

// Spec: GLES 3.0.5 section 2.12.8:

// "A program will fail to link if:"

// "any variable name specified in the varyings array is not declared as an output in the vertex shader;"

debug("");

var wtu = WebGLTestUtils;

var gl = wtu.create3DContext(undefined, undefined, 2);

if (!gl) {

    testFailed("WebGL context does not exist");

} else {

    runTest("bogus");

    runTest("gl_Bogus");

function runTest(nonExistentVaryingName) {

    var program = wtu.setupTransformFeedbackProgram(gl, ["vshader", "fshader"],

        [nonExistentVaryingName], gl.INTERLEAVED_ATTRIBS,

        ["position"]);

    var msg = "Program should fail to link when a nonexistent varying '" + nonExistentVaryingName + "' is specified for transform feedback.";

    if (program) {

        testFailed(msg);

    } else {

        testPassed(msg);

var successfullyParsed = true;

</script>

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

</body>

</html>