XFontsOfFontSet
Section: XLIB FUNCTIONS (3)
Updated: libX11 1.6.4
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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
Index
- NAME
-
- SYNTAX
-
- ARGUMENTS
-
- DESCRIPTION
-
- SEE ALSO
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