XFontsOfFontSet(3)

1XFontsOfFontSet(3)              XLIB FUNCTIONS              XFontsOfFontSet(3)
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NAME

6       XFontsOfFontSet, XBaseFontNameListOfFontSet, XLocaleOfFontSet, XCon‐
7       textDependentDrawing, XContextualDrawing, XDirectionalDependentDrawing
8       - obtain fontset information
9

SYNTAX

11       int XFontsOfFontSet(XFontSet font_set, XFontStruct
12              ***font_struct_list_return, char ***font_name_list_return);
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14       char *XBaseFontNameListOfFontSet(XFontSet font_set);
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16       char *XLocaleOfFontSet(XFontSet font_set);
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18       Bool XContextDependentDrawing(XFontSet font_set);
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20       Bool XContextualDrawing(XFontSet font_set);
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22       Bool XDirectionalDependentDrawing(XFontSet font_set);
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ARGUMENTS

25       font_set  Specifies the font set.
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27       font_name_list_return
28                 Returns the list of font names.
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30       font_struct_list_return
31                 Returns the list of font structs.
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DESCRIPTION

34       The XFontsOfFontSet function returns a list of one or more XFontStructs
35       and font names for the fonts used by the Xmb and Xwc layers for the
36       given font set.  A list of pointers to the XFontStruct structures is
37       returned to font_struct_list_return.  A list of pointers to null-termi‐
38       nated, fully specified font name strings in the locale of the font set
39       is returned to font_name_list_return.  The font_name_list order corre‐
40       sponds to the font_struct_list order.  The number of XFontStruct struc‐
41       tures and font names is returned as the value of the function.
42
43       Because it is not guaranteed that a given character will be imaged
44       using a single font glyph, there is no provision for mapping a charac‐
45       ter or default string to the font properties, font ID, or direction
46       hint for the font for the character.  The client may access the
47       XFontStruct list to obtain these values for all the fonts currently in
48       use.
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50       Xlib does not guarantee that fonts are loaded from the server at the
51       creation of an XFontSet.  Xlib may choose to cache font data, loading
52       it only as needed to draw text or compute text dimensions.  Therefore,
53       existence of the per_char metrics in the XFontStruct structures in the
54       XFontStructSet is undefined.  Also, note that all properties in the
55       XFontStruct structures are in the STRING encoding.
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57       The XFontStruct and font name lists are owned by Xlib and should not be
58       modified or freed by the client.  They will be freed by a call to
59       XFreeFontSet with the associated XFontSet.  Until freed, their contents
60       will not be modified by Xlib.
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62       The XBaseFontNameListOfFontSet function returns the original base font
63       name list supplied by the client when the XFontSet was created.  A
64       null-terminated string containing a list of comma-separated font names
65       is returned as the value of the function.  White space may appear imme‐
66       diately on either side of separating commas.
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68       If XCreateFontSet obtained an XLFD name from the font properties for
69       the font specified by a non-XLFD base name, the XBaseFontNameListOf‐
70       FontSet function will return the XLFD name instead of the non-XLFD base
71       name.
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73       The base font name list is owned by Xlib and should not be modified or
74       freed by the client.  It will be freed by a call to XFreeFontSet with
75       the associated XFontSet.  Until freed, its contents will not be modi‐
76       fied by Xlib.
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78       The XLocaleOfFontSet function returns the name of the locale bound to
79       the specified XFontSet, as a null-terminated string.
80
81       The returned locale name string is owned by Xlib and should not be mod‐
82       ified or freed by the client.  It may be freed by a call to XFree‐
83       FontSet with the associated XFontSet.  Until freed, it will not be mod‐
84       ified by Xlib.
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86       The XContextDependentDrawing function returns True if the drawing func‐
87       tions implement implicit text directionality or if text drawn with the
88       font_set might include context-dependent drawing; otherwise, it returns
89       False.
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91       The XContextualDrawing function returns True if text drawn with the
92       font set might include context-dependent drawing; otherwise, it returns
93       False.
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95       The XDirectionalDependentDrawing function returns True if the drawing
96       functions implement implicit text directionality; otherwise, it returns
97       False.
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NAME

SYNTAX

ARGUMENTS

DESCRIPTION

SEE ALSO