impeller/fixtures/runtime_stage_example.frag

// 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.

#include <flutter/runtime_effect.glsl>

uniform vec2 iResolution;
uniform float iTime;

out vec4 fragColor;

void main() {
  vec2 uv = FlutterFragCoord() / iResolution;
  float t = 4 * iTime;
  vec3 col = 0.5 + 0.5 * cos(t + uv.xyx + vec3(0, 1, 4));
  fragColor = vec4(col, 1.0);
}