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