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Copyright (c) 2021 The Khronos Group Inc.
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Shader identified as containing reciprocal square root of sum of squares should not crash</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="vshader" type="x-shader/x-vertex">#version 300 es
void main() {
   gl_Position = vec4(0.0, 0.0, 0.0, 0.0);
}
</script>
<script id="fshader" type="x-shader/x-fragment">#version 300 es
precision highp float;

#define CRASH 1

out vec4 fragmentColor;
void main()
{
    vec2 p = gl_FragCoord.xy;
    // This expression meets the requirement of being the reciprocal
    // square root of a sum of squares.
    float d = 1.0 / length(p);
#if CRASH
    if (p.x > 0.0)
    {
        d *= 2.0;
    }
#endif
    fragmentColor = vec4(d);
}
</script>
<script type="application/javascript">
"use strict";
description();
debug('Regression test for <a href="https://crbug.com/1079309">crbug.com/1079309</a>');
const wtu = WebGLTestUtils;
const tests = [
    {
        vShaderSource: wtu.getScript('vshader'),
        fShaderSource: wtu.getScript('fshader'),
        vShaderSuccess: true,
        fShaderSuccess: true,
        linkSuccess: true,
        passMsg: 'Shader containing expression that driver recognizes as reciprocal square root of sum of squares should compile and link'
    }
];

GLSLConformanceTester.runTests(tests, 2);
</script>
</body>
</html>
