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XListFonts(3)


NAME

   XListFonts, XFreeFontNames, XListFontsWithInfo, XFreeFontInfo - obtain
   or free font names and information

SYNTAX

   char **XListFonts(Display *display, char *pattern, int maxnames, int
          *actual_count_return);

   int XFreeFontNames(char *list[]);

   char **XListFontsWithInfo(Display *display, char *pattern, int
          maxnames, int *count_return, XFontStruct **info_return);

   int XFreeFontInfo(char **names, XFontStruct *free_info, int
          actual_count);

ARGUMENTS

   actual_count
             Specifies the actual number of font names.

   actual_count_return
             Returns the actual number of font names.

   count_return
             Returns the actual number of matched font names.

   display   Specifies the connection to the X server.

   info_return
             Returns the font information.

   free_info Specifies the font information.

   list      Specifies the array of strings you want to free.

   maxnames  Specifies the maximum number of names to be returned.

   names     Specifies the list of font names.

   pattern   Specifies the null-terminated pattern string that can contain
             wildcard characters.

DESCRIPTION

   The XListFonts function returns an array of available font names (as
   controlled by the font search path; see XSetFontPath) that match the
   string you passed to the pattern argument.  The pattern string can
   contain any characters, but each asterisk (*) is a wildcard for any
   number of characters, and each question mark (?) is a wildcard for a
   single character.  If the pattern string is not in the Host Portable
   Character Encoding, the result is implementation-dependent.  Use of
   uppercase or lowercase does not matter.  Each returned string is null-
   terminated.  If the data returned by the server is in the Latin
   Portable Character Encoding, then the returned strings are in the Host
   Portable Character Encoding.  Otherwise, the result is implementation-
   dependent.  If there are no matching font names, XListFonts returns
   NULL.  The client should call XFreeFontNames when finished with the
   result to free the memory.

   The XFreeFontNames function frees the array and strings returned by
   XListFonts or XListFontsWithInfo.

   The XListFontsWithInfo function returns a list of font names that match
   the specified pattern and their associated font information.  The list
   of names is limited to size specified by maxnames.  The information
   returned for each font is identical to what XLoadQueryFont would return
   except that the per-character metrics are not returned.  The pattern
   string can contain any characters, but each asterisk (*) is a wildcard
   for any number of characters, and each question mark (?) is a wildcard
   for a single character.  If the pattern string is not in the Host
   Portable Character Encoding, the result is implementation-dependent.
   Use of uppercase or lowercase does not matter.  Each returned string is
   null-terminated.  If the data returned by the server is in the Latin
   Portable Character Encoding, then the returned strings are in the Host
   Portable Character Encoding.  Otherwise, the result is implementation-
   dependent.  If there are no matching font names, XListFontsWithInfo
   returns NULL.

   To free only the allocated name array, the client should call
   XFreeFontNames.  To free both the name array and the font information
   array or to free just the font information array, the client should
   call XFreeFontInfo.

   The XFreeFontInfo function frees a font structure or an array of font
   structures and optionally an array of font names.  If NULL is passed
   for names, no font names are freed.  If a font structure for an open
   font (returned by XLoadQueryFont) is passed, the structure is freed,
   but the font is not closed; use XUnloadFont to close the font.

   Note that XListFontsWithInfo is not thread-safe. If other threads make
   X requests on the same Display, then this function's behavior is
   undefined.

SEE ALSO

   XLoadFont(3), XSetFontPath(3)
   Xlib - C Language X Interface



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