1XListFonts(3) XLIB FUNCTIONS XListFonts(3)
2
6 XListFonts, XFreeFontNames, XListFontsWithInfo, XFreeFontInfo - obtain
7 or free font names and information
8
10 char **XListFonts(Display *display, _Xconst char *pattern, int max‐
11 names, int *actual_count_return);
12 int XFreeFontNames(char *list[]);
14 char **XListFontsWithInfo(Display *display, _Xconst char *pattern, int
16 maxnames, int *count_return, XFontStruct **info_return);
17 int XFreeFontInfo(char **names, XFontStruct *free_info, int ac‐
19 tual_count);
20
22 actual_count
23 Specifies the actual number of font names.
24 actual_count_return
27 Returns the actual number of font names.
28 count_return
30 Returns the actual number of matched font names.
31 display Specifies the connection to the X server.
33 info_return
35 Returns the font information.
36 free_info Specifies the font information.
38 list Specifies the array of strings you want to free.
41 maxnames Specifies the maximum number of names to be returned.
43 names Specifies the list of font names.
45 pattern Specifies the null-terminated pattern string that can contain
48 wildcard characters.
49
51 The XListFonts function returns an array of available font names (as
52 controlled by the font search path; see XSetFontPath) that match the
53 string you passed to the pattern argument. The pattern string can con‐
54 tain any characters, but each asterisk (*) is a wildcard for any number
55 of characters, and each question mark (?) is a wildcard for a single
56 character. If the pattern string is not in the Host Portable Character
57 Encoding, the result is implementation-dependent. Use of uppercase or
58 lowercase does not matter. Each returned string is null-terminated.
59 If the data returned by the server is in the Latin Portable Character
60 Encoding, then the returned strings are in the Host Portable Character
61 Encoding. Otherwise, the result is implementation-dependent. If there
62 are no matching font names, XListFonts returns NULL. The client should
63 call XFreeFontNames when finished with the result to free the memory.
64 The XFreeFontNames function frees the array and strings returned by
66 XListFonts or XListFontsWithInfo.
67 The XListFontsWithInfo function returns a list of font names that match
69 the specified pattern and their associated font information. The list
70 of names is limited to size specified by maxnames. The information re‐
71 turned for each font is identical to what XLoadQueryFont would return
72 except that the per-character metrics are not returned. The pattern
73 string can contain any characters, but each asterisk (*) is a wildcard
74 for any number of characters, and each question mark (?) is a wildcard
75 for a single character. If the pattern string is not in the Host Por‐
76 table Character Encoding, the result is implementation-dependent. Use
77 of uppercase or lowercase does not matter. Each returned string is
78 null-terminated. If the data returned by the server is in the Latin
79 Portable Character Encoding, then the returned strings are in the Host
80 Portable Character Encoding. Otherwise, the result is implementation-
81 dependent. If there are no matching font names, XListFontsWithInfo re‐
82 turns NULL.
83 To free only the allocated name array, the client should call XFree‐
85 FontNames. To free both the name array and the font information array
86 or to free just the font information array, the client should call
87 XFreeFontInfo.
88 The XFreeFontInfo function frees a font structure or an array of font
90 structures and optionally an array of font names. If NULL is passed
91 for names, no font names are freed. If a font structure for an open
92 font (returned by XLoadQueryFont) is passed, the structure is freed,
93 but the font is not closed; use XUnloadFont to close the font.
94 Note that XListFontsWithInfo is not thread-safe. If other threads make
96 X requests on the same Display, then this function's behavior is unde‐
97 fined.
98
100 XLoadFont(3), XSetFontPath(3)
101 Xlib - C Language X Interface
102X Version 11 libX11 1.8.1 XListFonts(3)