227 lines
5.2 KiB
Plaintext
227 lines
5.2 KiB
Plaintext
.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xW Athena X Widgets \- C Language X Toolkit Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.na
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.ny0
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.TH XFontsOfFontSet 3X11 "Release 5" "X Version 11" "XLIB FUNCTIONS"
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.SH NAME
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XFontsOfFontSet, XBaseFontNameListOfFontSet, XLocaleOfFontSet, XContextDependentDrawing \- obtain fontset information
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.SH SYNTAX
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int XFontsOfFontSet\^(\^\fIfont_set\fP\^, \fIfont_struct_list_return\fP\^, \fIfont_name_list_return\fP\^)
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.br
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XFontSet \fIfont_set\fP\^;
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.br
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XFontStruct ***\fIfont_struct_list_return\fP\^;
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.br
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char ***\fIfont_name_list_return\fP\^;
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.LP
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char *XBaseFontNameListOfFontSet\^(\^\fIfont_set\fP\^)
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.br
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XFontSet \fIfont_set\fP\^;
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.LP
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char *XLocaleOfFontSet\^(\^\fIfont_set\fP\^)
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.br
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XFontSet \fIfont_set\fP\^;
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.LP
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Bool XContextDependentDrawing\^(\^\fIfont_set\fP\^)
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.br
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XFontSet \fIfont_set\fP\^;
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.SH ARGUMENTS
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.\" $Header: fontset.a,v 1.2 88/05/09 14:28:06 mento Exp $
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.IP \fIfont_set\fP 1i
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Specifies the font set.
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.IP \fIfont_name_list_return\fP 1i
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Returns the list of font names.
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.IP \fIfont_struct_list_return\fP 1i
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Returns the list of font structs.
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.SH DESCRIPTION
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The
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.ZN XFontsOfFontSet
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function returns a list of one or more
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.ZN XFontStructs
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and font names for the fonts used by the Xmb and Xwc layers,
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for the given font set.
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A list of pointers to the
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.ZN XFontStruct
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structures is returned to font_struct_list_return.
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A list of pointers to null-terminated fully specified font name strings
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in the locale of the font set is returned to font_name_list_return.
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The font_name_list order corresponds to the font_struct_list order.
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The number of
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.ZN XFontStruct
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structures and font names is returned as the value of the function.
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.LP
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Because it is not guaranteed that a given character will be imaged using a
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single font glyph,
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there is no provision for mapping a character or default string
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to the font properties, font ID, or direction hint for the font
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for the character.
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The client may access the
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.ZN XFontStruct
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list to obtain these values for all the fonts currently in use.
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.LP
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It is not required that fonts be loaded from the server at the creation of an
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.ZN XFontSet .
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Xlib may choose to cache font data, loading it only as needed to draw text
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or compute text dimensions.
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Therefore, existence of the per_char metrics in the
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.ZN XFontStruct
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structures in the
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.ZN XFontStructSet
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is undefined.
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Also, note that all properties in the
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.ZN XFontStruct
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structures are in the STRING encoding.
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.LP
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The
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.ZN XFontStruct
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and font name lists are owned by Xlib
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and should not be modified or freed by the client.
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They will be freed by a call to
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.ZN XFreeFontSet
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with the associated
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.ZN XFontSet .
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Until freed, its contents will not be modified by Xlib.
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.LP
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The
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.ZN XBaseFontNameListOfFontSet
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function returns the original base font name list supplied
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by the client when the
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.ZN XFontSet
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was created.
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A null-terminated string containing a list of
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comma-separated font names is returned
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as the value of the function.
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Whitespace may appear immediately on either side of separating commas.
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.LP
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If
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.ZN XCreateFontSet
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obtained an XLFD name from the font properties for the font specified
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by a non-XLFD base name, the
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.ZN XBaseFontNameListOfFontSet
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function will return the XLFD name instead of the non-XLFD base name.
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.LP
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The base font name list is owned by Xlib and should not be modified or
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freed by the client.
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It will be freed by a call to
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.ZN XFreeFontSet
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with the associated
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.ZN XFontSet .
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Until freed, its contents will not be modified by Xlib.
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.LP
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The
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.ZN XLocaleOfFontSet
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function
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returns the name of the locale bound to the specified
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.ZN XFontSet ,
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as a null-terminated string.
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.LP
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The returned locale name string is owned by Xlib
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and should not be modified or freed by the client.
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It may be freed by a call to
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.ZN XFreeFontSet
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with the associated
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.ZN XFontSet .
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Until freed, it will not be modified by Xlib.
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.LP
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The
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.ZN XContextDependentDrawing
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function returns
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.ZN True
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if text drawn with the font_set might include context-dependent drawing.
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.SH "SEE ALSO"
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XCreateFontSet(3X11),
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XExtentsOfFontSet(3X11),
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XFontSetExtents(3X11)
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.br
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\fI\*(xL\fP
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