NAME
XFontsOfFontSet, XBaseFontNameListOfFontSet, XLocaleOfFontSet,
XContextDependentDrawing, XContextualDrawing,
XDirectionalDependentDrawing - obtain fontset information
SYNTAX
int XFontsOfFontSet(XFontSet font_set, XFontStruct
***font_struct_list_return, char ***font_name_list_return);
char *XBaseFontNameListOfFontSet(XFontSet font_set);
char *XLocaleOfFontSet(XFontSet font_set);
Bool XContextDependentDrawing(XFontSet font_set);
Bool XContextualDrawing(XFontSet font_set);
Bool XDirectionalDependentDrawing(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 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.
The XDirectionalDependentDrawing function returns True if the drawing
functions implement implicit text directionality; otherwise, it returns
False.
SEE ALSO
XCreateFontSet(3), XCreateOM(3), XCreateOC(3), XExtentsOfFontSet(3),
XFontSetExtents(3)
Xlib - C Language X Interface