text: #pragma once
  
  /**
   * Initialize the DPI setting.
   * This will use the 'Xft.dpi' X resource if available and fall back to
   * guessing the correct value otherwise.
   */
  void init_dpi(void);
  
  /**
   * This function returns the value of the DPI setting.
   *
   */
  long get_dpi_value(void);
  
  /**
   * Convert a logical amount of pixels (e.g. 2 pixels on a “standard” 96 DPI
   * screen) to a corresponding amount of physical pixels on a standard or retina
   * screen, e.g. 5 pixels on a 227 DPI MacBook Pro 13" Retina screen.
   *
   */
  int logical_px(const int logical);
  