// #include //ly.img.cesdk/shader/common/ubq_noise
uniform shader image;
uniform float2 imageSize;
uniform float amount;
uniform float scale;
uniform float speed;
uniform float time;

half4 main(float2 coord) {
  float2 uv = coord / imageSize;
  uv.y = 1 - uv.y;
  float noise = getNoise(uv, time * 24.0, scale, speed);
  float2 noiseUv = uv + amount * noise;
  // wrap
  noiseUv = fract(noiseUv);
  noiseUv.y = 1 - noiseUv.y;
  noiseUv *= imageSize;
  return image.eval(noiseUv);
}