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<!--
/*
** Copyright (c) 2013 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be included
** in all copies or substantial portions of the Materials.
**
** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>WebGL GLSL Conformance Tests</title>
<link rel="stylesheet" href="../../../resources/js-test-style.css"/>
<link rel="stylesheet" href="../../../resources/glsl-feature-tests.css"/>
<script src="../../../js/js-test-pre.js"></script>
<script src="../../../js/webgl-test-utils.js"></script>
<script src="../../../js/glsl-conformance-test.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script id="fragmentShader" type="text/something-not-javascript">
// fragment shader should succeed
precision mediump float;
uniform vec4 foo;
void main()
{
gl_FragColor = foo;
}
</script>
<script id="vertexShader" type="text/something-not-javascript">
// vertex shader should succeed
attribute vec4 foo;
void main()
{
gl_Position = foo;
}
</script>
<script>
"use strict";
/*
GLSL 1.017 section 4.2.6
...
With the exception of uniform declarations, vertex and fragment shaders
have separate name spaces. Functions and global variables declared in a
vertex shader cannot be referenced by a fragment shader and vice versa.
Uniforms have a single name space. Uniforms declared with the same name
must have matching types and precisions.
Section 4.3.3
Attribute variables are required to have global scope
Section 4.3.4
The uniform qualifier is used to declare global variables
QED: If both uniforms and attributes are in the global namespace they
conflict across shaders
Note: This was brought up on the OpenGL ES working group and confirmed
that the spec required these conflicts to fail to link.
Though most drivers allow this to work, some drivers to do no therefore
WebGL implementation must enforce this restriction to provide consistent
behavior.
*/
GLSLConformanceTester.runTests([
{ vShaderId: 'vertexShader',
vShaderSuccess: true,
fShaderId: 'fragmentShader',
fShaderSuccess: true,
linkSuccess: false,
passMsg: 'shaders with conflicting uniform/attribute names should fail'
},
]);
var successfullyParsed = true;
</script>
</body>
</html>
|
