256 lines
6.7 KiB
Groff
256 lines
6.7 KiB
Groff
.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
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.\" Copyright \(co 2000 The XFree86 Project, Inc.
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.\"
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.\" Permission is hereby granted, free of charge, to any person obtaining
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.\" a copy of this software and associated documentation files (the
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.\" "Software"), to deal in the Software without restriction, including
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.\" without limitation the rights to use, copy, modify, merge, publish,
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.\" distribute, sublicense, and/or sell copies of the Software, and to
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.\" permit persons to whom the Software is furnished to do so, subject to
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.\" the following conditions:
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.\"
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.\" The above copyright notice and this permission notice shall be included
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.\" in all copies or substantial portions of the Software.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
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.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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.\" OTHER DEALINGS IN THE SOFTWARE.
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.\"
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.\" Except as contained in this notice, the name of the X Consortium shall
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.\" not be used in advertising or otherwise to promote the sale, use or
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.\" other dealings in this Software without prior written authorization
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.\" from the X Consortium.
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.\"
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.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
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.\" Digital Equipment Corporation
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.\"
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.\" Portions Copyright \(co 1990, 1991 by
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.\" Tektronix, Inc.
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.\"
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.\" Permission to use, copy, modify and distribute this documentation for
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.\" any purpose and without fee is hereby granted, provided that the above
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.\" copyright notice appears in all copies and that both that copyright notice
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.\" and this permission notice appear in all copies, and that the names of
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.\" Digital and Tektronix not be used in in advertising or publicity pertaining
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.\" to this documentation without specific, written prior permission.
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.\" Digital and Tektronix makes no representations about the suitability
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.\" of this documentation for any purpose.
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.\" It is provided ``as is'' without express or implied warranty.
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.\"
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.\"
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.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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.de Ds
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.nf
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.\\$1D \\$2 \\$1
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.ft 1
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.\".ps \\n(PS
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.de De
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.fi
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..
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.de FD
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.LP
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.KS
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.nf
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.de FN
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.KE
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.LP
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.de IN \" send an index entry to the stderr
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.de C{
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.KS
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.nf
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.D
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.\"
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.\" choose appropriate monospace font
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.\" the imagen conditional, 480,
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.\" may be changed to L if LB is too
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.\" heavy for your eyes...
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.\"
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.ie "\\*(.T"480" .ft L
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.el .ie "\\*(.T"300" .ft L
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.ny0
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.TH XmbDrawText __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XmbDrawText, XwcDrawText, Xutf8DrawText \- draw text using multiple font sets
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.SH SYNTAX
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.HP
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void XmbDrawText\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC
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\fIgc\fP\^, int \fIx\fP\^, int \fIy\fP\^, XmbTextItem *\fIitems\fP\^, int
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\fInitems\fP\^);
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.HP
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void XwcDrawText\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC
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\fIgc\fP\^, int \fIx\fP\^, int \fIy\fP\^, XwcTextItem *\fIitems\fP\^, int
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\fInitems\fP\^);
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.HP
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void Xutf8DrawText\^(\^Display *\fIdisplay\fP\^, Drawable \fId\fP\^, GC
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\fIgc\fP\^, int \fIx\fP\^, int \fIy\fP\^, XmbTextItem *\fIitems\fP\^, int \fInitems\fP\^);
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.SH ARGUMENTS
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.IP \fId\fP 1i
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Specifies the drawable.
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.IP \fIdisplay\fP 1i
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Specifies the connection to the X server.
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.IP \fIgc\fP 1i
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Specifies the GC.
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.IP \fIitems\fP 1i
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Specifies an array of text items.
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.IP \fInitems\fP 1i
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Specifies the number of text items in the array.
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.ds Xy
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.IP \fIx\fP 1i
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.br
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.ns
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.IP \fIy\fP 1i
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Specify the x and y coordinates\*(Xy.
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.SH DESCRIPTION
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The
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.ZN XmbDrawText ,
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.ZN XwcDrawText
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and
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.ZN Xutf8DrawText
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functions allow complex spacing and font set shifts between text strings.
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Each text item is processed in turn, with the origin of a text
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element advanced in the primary draw direction by the escapement of the
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previous text item.
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A text item delta specifies an additional escapement of the text item
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drawing origin in the primary draw direction.
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A font_set member other than
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.ZN None
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in an item causes the font set to be used for this and subsequent text items
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in the text_items list.
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Leading text items with a font_set member set to
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.ZN None
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will not be drawn.
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.LP
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.ZN XmbDrawText ,
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.ZN XwcDrawText
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and
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.ZN Xutf8DrawText
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do not perform any context-dependent rendering between text segments.
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Clients may compute the drawing metrics by passing each text segment to
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.ZN XmbTextExtents ,
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.ZN XwcTextExtents ,
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.ZN Xutf8TextExtents
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or
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.ZN XmbTextPerCharExtents ,
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.ZN XwcTextPerCharExtents .
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.ZN Xutf8TextPerCharExtents .
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When the
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.ZN XFontSet
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has missing charsets, each unavailable character is drawn
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with the default string returned by
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.ZN XCreateFontSet .
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The behavior for an invalid codepoint is undefined.
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.LP
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The function
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.ZN Xutf8DrawText
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is an extension introduced by The XFree86 Project, Inc. in their 4.0.2
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release. Its presence is
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indicated by the macro
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.ZN X_HAVE_UTF8_STRING .
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.SH STRUCTURES
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The
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.ZN XmbTextItem
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structure contains:
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.Ds 0
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.TA .5i 2.5i
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.ta .5i 2.5i
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typedef struct {
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char *chars; /\&* pointer to string */
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int nchars; /\&* number of bytes */
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int delta; /\&* pixel delta between strings */
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XFontSet font_set; /\&* fonts, None means don't change */
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} XmbTextItem;
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.De
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The
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.ZN XwcTextItem
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structure contains:
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.Ds 0
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.TA .5i 2.5i
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.ta .5i 2.5i
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typedef struct {
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wchar_t *chars; /\&* pointer to wide char string */
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int nchars; /\&* number of wide characters */
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int delta; /\&* pixel delta between strings */
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XFontSet font_set; /\&* fonts, None means don't change */
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} XwcTextItem;
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.De
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.SH "SEE ALSO"
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XDrawImageString(__libmansuffix__),
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XDrawString(__libmansuffix__),
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XDrawText(__libmansuffix__),
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XmbDrawImageString(__libmansuffix__),
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XmbDrawString(__libmansuffix__)
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.br
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\fI\*(xL\fP
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