manpagez: man pages & more
man XFreeFontInfo(3)
Home | html | info | man
XListFonts(3)                   XLIB FUNCTIONS                   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 max-
              names, 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 con-
       tain 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  Por-
       table  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 XFree-
       FontNames.  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 unde-
       fined.


SEE ALSO

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



X Version 11                     libX11 1.6.9                    XListFonts(3)

xorg-libX11 1.6.9 - Generated Tue Oct 22 15:05:57 CDT 2019
© manpagez.com 2000-2024
Individual documents may contain additional copyright information.