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XkbVirtualModsToReal(3) 		  XKB FUNCTIONS 		  XkbVirtualModsToReal(3)

NAME
       XkbVirtualModsToReal - Determines the mapping of virtual modifiers to core X protocol mod-
       ifiers

SYNOPSIS
       Bool  XkbVirtualModsToReal  (XkbDescPtr	xkb,  unsigned	int  virtual_mask,  unsigned  int
	      *mask_rtrn);

ARGUMENTS
       - xkb  keyboard description for input device

       - virtual_mask
	      virtual modifier mask to translate

       - mask_rtrn
	      backfilled with real modifiers

DESCRIPTION
       Xkb  maintains  a  virtual  modifier mapping, which lists the virtual modifiers associated
       with, or bound to, each key. The real modifiers bound to a virtual modifier always include
       all  of the modifiers bound to any of the keys that specify that virtual modifier in their
       virtual modifier mapping. The server.vmodmap array indicates which virtual  modifiers  are
       bound  to  each	key;  each  entry  is  a  bitmask  for	the  virtual  modifier	bits. The
       server.vmodmap array is indexed by keycode.

       The vmodmap and vmods members of the server map are the "master" virtual modifier  defini-
       tions.  Xkb  automatically propagates any changes to these fields to all other fields that
       use virtual modifier mappings.

       For example, if Mod3 is bound to the Num_Lock key by the core protocol  modifier  mapping,
       and  the  NumLock  virtual  modifier is bound to they Num_Lock key by the virtual modifier
       mapping, Mod3 is added to the set of modifiers associated with NumLock.

       The virtual modifier mapping  is  normally  updated  whenever  actions  are  automatically
       applied to symbols and few applications should need to change the virtual modifier mapping
       explicitly.

       Use XkbGetMap to get the virtual modifiers from the server  or  use  XkbGetVirtualMods  to
       update  a local copy of the virtual modifiers bindings from the server. To set the binding
       of a virtual modifier to a real modifier, use XkbGetVirtualMods

       If the keyboard description defined by xkb includes bindings for virtual  modifiers,  Xkb-
       VirtualModsToReal  uses	those bindings to determine the set of real modifiers that corre-
       spond to the set of virtual modifiers specified in virtual_mask.  The virtual_mask parame-
       ter  is a mask specifying the virtual modifiers to translate; the i-th bit (0 relative) of
       the mask represents the i-th virtual modifier. If mask_rtrn is non-NULL, XkbVirtualModsTo-
       Real  backfills	it  with the resulting real modifier mask. If the keyboard description in
       xkb does not include virtual modifier bindings, XkbVirtualModsToReal returns False; other-
       wise, it returns True.

RETURN VALUES
       True	      The  XkbVirtualModsToReal function returns True if the keyboard description
		      in xkb does include virtual modifier bindings.

       False	      The XkbVirtualModsToReal function returns False if the keyboard description
		      in xkb does not include virtual modifier bindings.

SEE ALSO
       XkbGetMap(3), XkbGetVirtualMods(3)

NOTES
       It  is  possible for a local (client-side) keyboard description (the xkb parameter) to not
       contain any virtual modifier information (simply because the client has not requested  it)
       while the server's corresponding definition may contain virtual modifier information.

X Version 11				   libX11 1.6.0 		  XkbVirtualModsToReal(3)
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