#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); | |
} |