reciprocal-sqrt-of-sum-of-squares-crash.html

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Copyright (c) 2021 The Khronos Group Inc.

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<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>

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<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>