void gdk_screen_set_resolution ( GdkScreen* screen, gdouble dpi )
Sets the resolution for font handling on the screen. This is a
scale factor between points specified in a
and cairo units. The default value is 96, meaning that a 10 point
font will be 13 units high. (10 * 96. / 72. = 13.3).
Available since: 2.10