<!--
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>Initializing an array with a loop 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>
<script src="../../../js/glsl-conformance-test.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script id="fshaderInitLoop" type="x-shader/x-fragment">
precision mediump float;

void initGlobals();

uniform vec4 in0;
vec4 out0;

float func(float a[4]) {
    a[0] = -1.0;
    return a[0];
}

float arr[4];

bool isOk(vec4 a) {
    vec4 ref = -(in0 + 1.0);
    if (abs(a.x - ref.x) < 0.05 && abs(a.y - ref.y) < 0.05 && abs(a.z - ref.z) < 0.05 && abs(a.w - ref.w) < 0.05)
    {
        return true;
    }
    return false;
}

void main() {
    initGlobals();
    arr[0] = in0.x + 1.0;
    arr[1] = in0.y + 1.0;
    arr[2] = in0.z + 1.0;
    arr[3] = in0.w + 1.0;
    mediump float f = func(arr);
    out0 = f * vec4(arr[0], arr[1], arr[2], arr[3]);
    if (isOk(out0))
    {
        gl_FragColor = vec4(0.0, 1.0, 0.0, 1.0);
    }
    else
    {
        gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
    }
}

void initGlobals() {
    out0 = vec4(0.0, 0.0, 0.0, 0.0);
    for (int i = 0; i < 4; ++i)
    {
        arr[i] = 0.0;
    }
}
</script>
<script type="text/javascript">
"use strict";
description();

GLSLConformanceTester.runRenderTests([
{
  fShaderId: 'fshaderInitLoop',
  fShaderSuccess: true,
  linkSuccess: true,
  passMsg: "Initialize a global array using a for loop"
}
]);
</script>
</body>
</html>
