!7

cmodule DownsampleFFTImage > DynImageSurface {
  switchable int w = 10;
  switchable int h = 10;
  
  afterVisualize {
    imageSurface_pixelated(imageSurface);
    setZoom(20);
  }
    
  start {
    dm_requireLiveAudioFFT();

    dm_vmBus_onMessage_q newAudioFrequencyImage(voidfunc(virtual BWImage _img) {
      BWImage img = cast quickImport(_img);
      BWIntegralImage ii = new(img);
      setImage(scaleDownUsingIntegralImageBW(ii, w, h));
   });
  }
}

Began life as a copy of #1026913