path: root/man/XmbDrawText.man

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.\" $XFree86: xc/doc/man/X11/XmbDTxt.man,v 1.4 2003/04/28 22:17:58 herrb Exp $
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.ds xT X Toolkit Intrinsics \- C Language Interface
.ds xW Athena X Widgets \- C Language X Toolkit Interface
.ds xL Xlib \- C Language X Interface
.ds xC Inter-Client Communication Conventions Manual
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.TH XmbDrawText __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
.SH NAME
XmbDrawText, XwcDrawText, Xutf8DrawText \- draw text using multiple font sets 
.SH SYNTAX
.HP
void XmbDrawText\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC
\fIgc\fP\^, int \fIx\fP\^, int \fIy\fP\^, XmbTextItem *\fIitems\fP\^, int
\fInitems\fP\^); 
.HP
void XwcDrawText\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC
\fIgc\fP\^, int \fIx\fP\^, int \fIy\fP\^, XwcTextItem *\fIitems\fP\^, int
\fInitems\fP\^); 
.HP
void Xutf8DrawText\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC
\fIgc\fP\^, int \fIx\fP\^, int \fIy\fP\^, XmbTextItem *\fIitems\fP\^, int \fInitems\fP\^);
.SH ARGUMENTS
.IP \fId\fP 1i
Specifies the drawable. 
.IP \fIdisplay\fP 1i
Specifies the connection to the X server.
.IP \fIgc\fP 1i
Specifies the GC.
.IP \fIitems\fP 1i
Specifies an array of text items.
.IP \fInitems\fP 1i
Specifies the number of text items in the array.
.ds Xy
.IP \fIx\fP 1i
.br
.ns
.IP \fIy\fP 1i
Specify the x and y coordinates\*(Xy.
.SH DESCRIPTION
The
.ZN XmbDrawText ,
.ZN XwcDrawText 
and 
.ZN Xutf8DrawText 
functions allow complex spacing and font set shifts between text strings.
Each text item is processed in turn, with the origin of a text
element advanced in the primary draw direction by the escapement of the
previous text item.
A text item delta specifies an additional escapement of the text item
drawing origin in the primary draw direction.
A font_set member other than 
.ZN None
in an item causes the font set to be used for this and subsequent text items
in the text_items list.
Leading text items with a font_set member set to
.ZN None
will not be drawn.
.LP
.ZN XmbDrawText ,
.ZN XwcDrawText
and
.ZN Xutf8DrawText
do not perform any context-dependent rendering between text segments.
Clients may compute the drawing metrics by passing each text segment to
.ZN XmbTextExtents ,
.ZN XwcTextExtents ,
.ZN Xutf8TextExtents
or
.ZN XmbTextPerCharExtents ,
.ZN XwcTextPerCharExtents .
.ZN Xutf8TextPerCharExtents .
When the 
.ZN XFontSet
has missing charsets, each unavailable character is drawn 
with the default string returned by 
.ZN XCreateFontSet .
The behavior for an invalid codepoint is undefined.
.LP
The function
.ZN Xutf8DrawText
is an extension introduced by The XFree86 Project, Inc. in their 4.0.2
release. Its presence is
indicated by the macro
.ZN X_HAVE_UTF8_STRING .
.SH STRUCTURES
The
.ZN XmbTextItem
structure contains:
.Ds 0
.TA .5i 2.5i
.ta .5i 2.5i
typedef struct {
	char *chars;	/\&* pointer to string */
	int nchars;	/\&* number of bytes */
	int delta;	/\&* pixel delta between strings */
	XFontSet font_set; 	/\&* fonts, None means don't change */
} XmbTextItem;
.De
The
.ZN XwcTextItem
structure contains:
.Ds 0
.TA .5i 2.5i
.ta .5i 2.5i
typedef struct {
	wchar_t *chars;	/\&* pointer to wide char string */
	int nchars;	/\&* number of wide characters */
	int delta;	/\&* pixel delta between strings */
	XFontSet font_set;	/\&* fonts, None means don't change */
} XwcTextItem;
.De
.SH "SEE ALSO"
XDrawImageString(__libmansuffix__),
XDrawString(__libmansuffix__),
XDrawText(__libmansuffix__),
XmbDrawImageString(__libmansuffix__),
XmbDrawString(__libmansuffix__)
.br
\fI\*(xL\fP