/* 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. */ #ifdef GL_ES precision mediump float; #endif varying vec4 color; void main (void) { float c = sqrt(100.0 * color.r); gl_FragColor = vec4(c * c / 100.0, 0.0, 0.0, 1.0); }