| #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( | |
| // cos(0.0) = 1.0 | |
| acos(1.0), | |
| // cos(1.0) = 0.54030230586 | |
| acos(a * 0.54030230586), 0.0, 1.0); | |
| } |