XFontsOfFontSet(3X11X Version 11 (Release 6.XFontsOfFontSet(3X11)
NAME
XFontsOfFontSet, XBaseFontNameListOfFontSet,
XLocaleOfFontSet, XContextDependentDrawing,
XContextualDrawing, XDirectionalDependentDrawing - obtain
fontset information
SYNTAX
int XFontsOfFontSet(font_set, font_struct_list_return,
font_name_list_return)
XFontSet font_set;
XFontStruct ***font_struct_list_return;
char ***font_name_list_return;
char *XBaseFontNameListOfFontSet(font_set)
XFontSet font_set;
char *XLocaleOfFontSet(font_set)
XFontSet font_set;
Bool XContextDependentDrawing(font_set)
XFontSet font_set;
Bool XContextualDrawing(font_set)
XFontSet font_set;
Bool XDirectionalDependentDrawing(font_set)
XFontSet font_set;
ARGUMENTS
font_set Specifies the font set.
font_name_list_return
Returns the list of font names.
font_struct_list_return
Returns the list of font structs.
DESCRIPTION
The XFontsOfFontSet function returns a list of one or more
XFontStructs and font names for the fonts used by the Xmb
and Xwc layers for the given font set. A list of pointers
to the XFontStruct structures is returned to
font_struct_list_return. A list of pointers to null-
terminated, fully specified font name strings in the locale
of the font set is returned to font_name_list_return. The
font_name_list order corresponds to the font_struct_list
order. The number of XFontStruct structures and font names
is returned as the value of the function.
Because it is not guaranteed that a given character will be
imaged using a single font glyph, there is no provision for
mapping a character or default string to the font
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properties, font ID, or direction hint for the font for the
character. The client may access the XFontStruct list to
obtain these values for all the fonts currently in use.
Xlib does not guarantee that fonts are loaded from the
server at the creation of an XFontSet. Xlib may choose to
cache font data, loading it only as needed to draw text or
compute text dimensions. Therefore, existence of the
per_char metrics in the XFontStruct structures in the
XFontStructSet is undefined. Also, note that all properties
in the XFontStruct structures are in the STRING encoding.
The XFontStruct and font name lists are owned by Xlib and
should not be modified or freed by the client. They will be
freed by a call to XFreeFontSet with the associated
XFontSet. Until freed, their contents will not be modified
by Xlib.
The XBaseFontNameListOfFontSet function returns the original
base font name list supplied by the client when the XFontSet
was created. A null-terminated string containing a list of
comma-separated font names is returned as the value of the
function. White space may appear immediately on either side
of separating commas.
If XCreateFontSet obtained an XLFD name from the font
properties for the font specified by a non-XLFD base name,
the XBaseFontNameListOfFontSet function will return the XLFD
name instead of the non-XLFD base name.
The base font name list is owned by Xlib and should not be
modified or freed by the client. It will be freed by a call
to XFreeFontSet with the associated XFontSet. Until freed,
its contents will not be modified by Xlib.
The XLocaleOfFontSet function returns the name of the locale
bound to the specified XFontSet, as a null-terminated
string.
The returned locale name string is owned by Xlib and should
not be modified or freed by the client. It may be freed by
a call to XFreeFontSet with the associated XFontSet. Until
freed, it will not be modified by Xlib.
The XContextDependentDrawing function returns True if the
drawing functions implement implicit text directionality or
if text drawn with the font_set might include context-
dependent drawing; otherwise, it returns False.
The XContextualDrawing function returns True if text drawn
with the font set might include context-dependent drawing;
otherwise, it returns False.
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XFontsOfFontSet(3X11X Version 11 (Release 6.XFontsOfFontSet(3X11)
The XDirectionalDependentDrawing function returns True if
the drawing functions implement implicit text
directionality; otherwise, it returns False.
SEE ALSO
XCreateFontSet(3X11), XCreateOM(3X11), XCreateOC(3X11),
XExtentsOfFontSet(3X11), XFontSetExtents(3X11)
Xlib - C Language X Interface
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