Function: viper-device-type

viper-device-type is a for window-system(var)/window-system(fun), defined in frame.c.

This function is obsolete since 27.1; use window-system(var)/window-system(fun) instead.

Signature

(viper-device-type &optional FRAME)

Documentation

The name of the window system that FRAME is displaying through.

The value is a symbol:
 nil for a termcap frame (a character-only terminal),
 x for an Emacs frame that is really an X window,
 w32 for an Emacs frame that is a window on MS-Windows display,
 ns for an Emacs frame on a GNUstep or Macintosh Cocoa display,
 pc for a direct-write MS-DOS frame.

FRAME defaults to the currently selected frame.

Use of this function as a predicate is deprecated. Instead, use display-graphic-p or any of the other display-*-p predicates which report frame's specific UI-related capabilities.

Aliases

viper-device-type (obsolete since 27.1)