#version 320 es

// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

precision highp float;

layout(location = 0) out vec4 fragColor;

layout(location = 0) uniform float a;

void main() {
  fragColor = vec4(0.0,
                   // 1.0 / sqrt(1.0) = 1.0
                   inversesqrt(a), 0.0,
                   // 1.0 / sqrt(4.0) + 0.5 = 1.0 / 2.0 + 0.5 = 1.0
                   inversesqrt(a * 4.0) + 0.5);
}