docs: T clipInput(T input, T output) {
  		double ratioInput = input.width/(double)input.height;
  		double ratioOutput = output.width/(double)output.height;
  
  		T a = input;
  
  		if( ratioInput > ratioOutput ) { // clip the width
  			int width = input.height*output.width/output.height;
  			int x0 = (input.width-width)/2;
  			int x1 = x0 + width;
  
  			clipped = input.subimage(x0,0,x1,input.height, clipped);
  			a = clipped;
  		} else if( ratioInput < ratioOutput ) { // clip the height
  			int height = input.width*output.height/output.width;
  			int y0 = (input.height-height)/2;
  			int y1 = y0 + height;
  
  			clipped = input.subimage(0,y0,input.width,y1, clipped);
  			a = clipped;
  		}
  
  		return a;
  	}