2006-11-25 09:33:55 -07:00
|
|
|
.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
|
|
|
|
|
.\"
|
|
|
|
|
.\" Permission is hereby granted, free of charge, to any person obtaining
|
|
|
|
|
.\" a copy of this software and associated documentation files (the
|
|
|
|
|
.\" "Software"), to deal in the Software without restriction, including
|
|
|
|
|
.\" without limitation the rights to use, copy, modify, merge, publish,
|
|
|
|
|
.\" distribute, sublicense, and/or sell copies of the Software, and to
|
|
|
|
|
.\" permit persons to whom the Software is furnished to do so, subject to
|
|
|
|
|
.\" the following conditions:
|
|
|
|
|
.\"
|
|
|
|
|
.\" The above copyright notice and this permission notice shall be included
|
|
|
|
|
.\" in all copies or substantial portions of the Software.
|
|
|
|
|
.\"
|
|
|
|
|
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
|
|
|
.\" OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
|
|
|
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
|
|
|
.\" IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
|
|
|
.\" OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
|
|
|
.\" ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
|
|
|
.\" OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Except as contained in this notice, the name of the X Consortium shall
|
|
|
|
|
.\" not be used in advertising or otherwise to promote the sale, use or
|
|
|
|
|
.\" other dealings in this Software without prior written authorization
|
|
|
|
|
.\" from the X Consortium.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991 by
|
|
|
|
|
.\" Digital Equipment Corporation
|
|
|
|
|
.\"
|
|
|
|
|
.\" Portions Copyright \(co 1990, 1991 by
|
|
|
|
|
.\" Tektronix, Inc.
|
|
|
|
|
.\"
|
|
|
|
|
.\" Permission to use, copy, modify and distribute this documentation for
|
|
|
|
|
.\" any purpose and without fee is hereby granted, provided that the above
|
|
|
|
|
.\" copyright notice appears in all copies and that both that copyright notice
|
|
|
|
|
.\" and this permission notice appear in all copies, and that the names of
|
|
|
|
|
.\" Digital and Tektronix not be used in in advertising or publicity pertaining
|
|
|
|
|
.\" to this documentation without specific, written prior permission.
|
|
|
|
|
.\" Digital and Tektronix makes no representations about the suitability
|
|
|
|
|
.\" of this documentation for any purpose.
|
|
|
|
|
.\" It is provided ``as is'' without express or implied warranty.
|
|
|
|
|
.\"
|
|
|
|
|
.\"
|
|
|
|
|
.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
|
|
|
|
|
.na
|
|
|
|
|
.de Ds
|
|
|
|
|
.nf
|
|
|
|
|
.\\$1D \\$2 \\$1
|
|
|
|
|
.ft 1
|
|
|
|
|
.\".ps \\n(PS
|
|
|
|
|
.\".if \\n(VS>=40 .vs \\n(VSu
|
|
|
|
|
.\".if \\n(VS<=39 .vs \\n(VSp
|
|
|
|
|
..
|
|
|
|
|
.de De
|
|
|
|
|
.ce 0
|
|
|
|
|
.if \\n(BD .DF
|
|
|
|
|
.nr BD 0
|
|
|
|
|
.in \\n(OIu
|
|
|
|
|
.if \\n(TM .ls 2
|
|
|
|
|
.sp \\n(DDu
|
|
|
|
|
.fi
|
|
|
|
|
..
|
|
|
|
|
.de FD
|
|
|
|
|
.LP
|
|
|
|
|
.KS
|
|
|
|
|
.TA .5i 3i
|
|
|
|
|
.ta .5i 3i
|
|
|
|
|
.nf
|
|
|
|
|
..
|
|
|
|
|
.de FN
|
|
|
|
|
.fi
|
|
|
|
|
.KE
|
|
|
|
|
.LP
|
|
|
|
|
..
|
|
|
|
|
.de IN \" send an index entry to the stderr
|
|
|
|
|
..
|
|
|
|
|
.de C{
|
|
|
|
|
.KS
|
|
|
|
|
.nf
|
|
|
|
|
.D
|
|
|
|
|
.\"
|
|
|
|
|
.\" choose appropriate monospace font
|
|
|
|
|
.\" the imagen conditional, 480,
|
|
|
|
|
.\" may be changed to L if LB is too
|
|
|
|
|
.\" heavy for your eyes...
|
|
|
|
|
.\"
|
|
|
|
|
.ie "\\*(.T"480" .ft L
|
|
|
|
|
.el .ie "\\*(.T"300" .ft L
|
|
|
|
|
.el .ie "\\*(.T"202" .ft PO
|
|
|
|
|
.el .ie "\\*(.T"aps" .ft CW
|
|
|
|
|
.el .ft R
|
|
|
|
|
.ps \\n(PS
|
|
|
|
|
.ie \\n(VS>40 .vs \\n(VSu
|
|
|
|
|
.el .vs \\n(VSp
|
|
|
|
|
..
|
|
|
|
|
.de C}
|
|
|
|
|
.DE
|
|
|
|
|
.R
|
|
|
|
|
..
|
|
|
|
|
.de Pn
|
|
|
|
|
.ie t \\$1\fB\^\\$2\^\fR\\$3
|
|
|
|
|
.el \\$1\fI\^\\$2\^\fP\\$3
|
|
|
|
|
..
|
|
|
|
|
.de ZN
|
|
|
|
|
.ie t \fB\^\\$1\^\fR\\$2
|
|
|
|
|
.el \fI\^\\$1\^\fP\\$2
|
|
|
|
|
..
|
|
|
|
|
.de hN
|
|
|
|
|
.ie t <\fB\\$1\fR>\\$2
|
|
|
|
|
.el <\fI\\$1\fP>\\$2
|
|
|
|
|
..
|
|
|
|
|
.de NT
|
|
|
|
|
.ne 7
|
|
|
|
|
.ds NO Note
|
|
|
|
|
.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2
|
|
|
|
|
.if \\n(.$ .if !'\\$1'C' .ds NO \\$1
|
|
|
|
|
.ie n .sp
|
|
|
|
|
.el .sp 10p
|
|
|
|
|
.TB
|
|
|
|
|
.ce
|
|
|
|
|
\\*(NO
|
|
|
|
|
.ie n .sp
|
|
|
|
|
.el .sp 5p
|
|
|
|
|
.if '\\$1'C' .ce 99
|
|
|
|
|
.if '\\$2'C' .ce 99
|
|
|
|
|
.in +5n
|
|
|
|
|
.ll -5n
|
|
|
|
|
.R
|
|
|
|
|
..
|
|
|
|
|
. \" Note End -- doug kraft 3/85
|
|
|
|
|
.de NE
|
|
|
|
|
.ce 0
|
|
|
|
|
.in -5n
|
|
|
|
|
.ll +5n
|
|
|
|
|
.ie n .sp
|
|
|
|
|
.el .sp 10p
|
|
|
|
|
..
|
|
|
|
|
.ny0
|
|
|
|
|
.TH XTextExtents __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
|
|
|
|
|
.SH NAME
|
|
|
|
|
XTextExtents, XTextExtents16, XQueryTextExtents, XQueryTextExtents16 \- compute or query text extents
|
|
|
|
|
.SH SYNTAX
|
|
|
|
|
.HP
|
|
|
|
|
int XTextExtents\^(\^XFontStruct *\fIfont_struct\fP\^, char *\fIstring\fP\^,
|
|
|
|
|
int \fInchars\fP\^, int *\fIdirection_return\fP\^, int
|
|
|
|
|
*\fIfont_ascent_return\fP, int *\fIfont_descent_return\fP\^, XCharStruct
|
|
|
|
|
*\fIoverall_return\fP\^);
|
|
|
|
|
.HP
|
|
|
|
|
int XTextExtents16\^(\^XFontStruct *\fIfont_struct\fP\^, XChar2b
|
|
|
|
|
*\fIstring\fP\^, int \fInchars\fP\^, int *\fIdirection_return\fP\^, int
|
|
|
|
|
*\fIfont_ascent_return\fP, int *\fIfont_descent_return\fP\^, XCharStruct
|
|
|
|
|
*\fIoverall_return\fP\^);
|
|
|
|
|
.HP
|
|
|
|
|
int XQueryTextExtents\^(\^Display *\fIdisplay\fP\^, XID \fIfont_ID\fP\^, char
|
|
|
|
|
*\fIstring\fP\^, int \fInchars\fP\^, int *\fIdirection_return\fP\^, int
|
|
|
|
|
*\fIfont_ascent_return\fP, int *\fIfont_descent_return\fP\^, XCharStruct
|
|
|
|
|
*\fIoverall_return\fP\^);
|
|
|
|
|
.HP
|
|
|
|
|
int XQueryTextExtents16\^(\^Display *\fIdisplay\fP\^, XID \fIfont_ID\fP\^,
|
|
|
|
|
XChar2b *\fIstring\fP\^, int \fInchars\fP\^, int *\fIdirection_return\fP\^,
|
|
|
|
|
int *\fIfont_ascent_return\fP, int *\fIfont_descent_return\fP\^, XCharStruct
|
|
|
|
|
*\fIoverall_return\fP\^);
|
|
|
|
|
.SH ARGUMENTS
|
|
|
|
|
.IP \fIdirection_return\fP 1i
|
|
|
|
|
Returns the value of the direction hint
|
|
|
|
|
.Pn ( FontLeftToRight
|
|
|
|
|
or
|
|
|
|
|
.ZN FontRightToLeft ).
|
|
|
|
|
.IP \fIdisplay\fP 1i
|
|
|
|
|
Specifies the connection to the X server.
|
|
|
|
|
.IP \fIfont_ID\fP 1i
|
|
|
|
|
Specifies either the font ID or the
|
|
|
|
|
.ZN GContext
|
|
|
|
|
ID that contains the font.
|
|
|
|
|
.IP \fIfont_ascent_return\fP 1i
|
|
|
|
|
Returns the font ascent.
|
|
|
|
|
.IP \fIfont_descent_return\fP 1i
|
|
|
|
|
Returns the font descent.
|
|
|
|
|
.IP \fIfont_struct\fP 1i
|
|
|
|
|
Specifies the
|
|
|
|
|
.ZN XFontStruct
|
|
|
|
|
structure.
|
|
|
|
|
.IP \fInchars\fP 1i
|
|
|
|
|
Specifies the number of characters in the character string.
|
|
|
|
|
.IP \fIstring\fP 1i
|
|
|
|
|
Specifies the character string.
|
|
|
|
|
.IP \fIoverall_return\fP 1i
|
|
|
|
|
Returns the overall size in the specified
|
|
|
|
|
.ZN XCharStruct
|
|
|
|
|
structure.
|
|
|
|
|
.SH DESCRIPTION
|
|
|
|
|
The
|
|
|
|
|
.ZN XTextExtents
|
|
|
|
|
and
|
|
|
|
|
.ZN XTextExtents16
|
|
|
|
|
functions
|
|
|
|
|
perform the size computation locally and, thereby,
|
|
|
|
|
avoid the round-trip overhead of
|
|
|
|
|
.ZN XQueryTextExtents
|
|
|
|
|
and
|
|
|
|
|
.ZN XQueryTextExtents16 .
|
|
|
|
|
Both functions return an
|
|
|
|
|
.ZN XCharStruct
|
|
|
|
|
structure, whose members are set to the values as follows.
|
|
|
|
|
.LP
|
|
|
|
|
The ascent member is set to the maximum of the ascent metrics of all
|
|
|
|
|
characters in the string.
|
|
|
|
|
The descent member is set to the maximum of the descent metrics.
|
|
|
|
|
The width member is set to the sum of the character-width metrics of all
|
|
|
|
|
characters in the string.
|
|
|
|
|
For each character in the string,
|
|
|
|
|
let W be the sum of the character-width metrics of all characters preceding
|
|
|
|
|
it in the string.
|
|
|
|
|
Let L be the left-side-bearing metric of the character plus W.
|
|
|
|
|
Let R be the right-side-bearing metric of the character plus W.
|
|
|
|
|
The lbearing member is set to the minimum L of all characters in the string.
|
|
|
|
|
The rbearing member is set to the maximum R.
|
|
|
|
|
.LP
|
|
|
|
|
For fonts defined with linear indexing rather than 2-byte matrix indexing,
|
|
|
|
|
each
|
|
|
|
|
.ZN XChar2b
|
|
|
|
|
structure is interpreted as a 16-bit number with byte1 as the
|
|
|
|
|
most significant byte.
|
|
|
|
|
If the font has no defined default character,
|
|
|
|
|
undefined characters in the string are taken to have all zero metrics.
|
|
|
|
|
.LP
|
|
|
|
|
The
|
|
|
|
|
.ZN XQueryTextExtents
|
|
|
|
|
and
|
|
|
|
|
.ZN XQueryTextExtents16
|
|
|
|
|
functions return the bounding box of the specified 8-bit and 16-bit
|
|
|
|
|
character string in the specified font or the font contained in the
|
|
|
|
|
specified GC.
|
|
|
|
|
These functions query the X server and, therefore, suffer the round-trip
|
|
|
|
|
overhead that is avoided by
|
|
|
|
|
.ZN XTextExtents
|
|
|
|
|
and
|
|
|
|
|
.ZN XTextExtents16 .
|
|
|
|
|
Both functions return a
|
|
|
|
|
.ZN XCharStruct
|
|
|
|
|
structure, whose members are set to the values as follows.
|
|
|
|
|
.LP
|
|
|
|
|
The ascent member is set to the maximum of the ascent metrics
|
|
|
|
|
of all characters in the string.
|
|
|
|
|
The descent member is set to the maximum of the descent metrics.
|
|
|
|
|
The width member is set to the sum of the character-width metrics
|
|
|
|
|
of all characters in the string.
|
|
|
|
|
For each character in the string,
|
|
|
|
|
let W be the sum of the character-width metrics of all characters preceding
|
|
|
|
|
it in the string.
|
|
|
|
|
Let L be the left-side-bearing metric of the character plus W.
|
|
|
|
|
Let R be the right-side-bearing metric of the character plus W.
|
|
|
|
|
The lbearing member is set to the minimum L of all characters in the string.
|
|
|
|
|
The rbearing member is set to the maximum R.
|
|
|
|
|
.LP
|
|
|
|
|
For fonts defined with linear indexing rather than 2-byte matrix indexing,
|
|
|
|
|
each
|
|
|
|
|
.ZN XChar2b
|
|
|
|
|
structure is interpreted as a 16-bit number with byte1 as the
|
|
|
|
|
most significant byte.
|
|
|
|
|
If the font has no defined default character,
|
|
|
|
|
undefined characters in the string are taken to have all zero metrics.
|
|
|
|
|
.LP
|
|
|
|
|
Characters with all zero metrics are ignored.
|
|
|
|
|
If the font has no defined default_char,
|
|
|
|
|
the undefined characters in the string are also ignored.
|
|
|
|
|
.LP
|
|
|
|
|
.ZN XQueryTextExtents
|
|
|
|
|
and
|
|
|
|
|
.ZN XQueryTextExtents16
|
|
|
|
|
can generate
|
|
|
|
|
.ZN BadFont
|
|
|
|
|
and
|
|
|
|
|
.ZN BadGC
|
|
|
|
|
errors.
|
|
|
|
|
.SH DIAGNOSTICS
|
|
|
|
|
.TP 1i
|
|
|
|
|
.ZN BadFont
|
|
|
|
|
A value for a Font or GContext argument does not name a defined Font.
|
|
|
|
|
.TP 1i
|
|
|
|
|
.ZN BadGC
|
|
|
|
|
A value for a GContext argument does not name a defined GContext.
|
|
|
|
|
.SH "SEE ALSO"
|
2010-05-18 13:37:28 -06:00
|
|
|
XLoadFont(__libmansuffix__),
|
|
|
|
|
XTextWidth(__libmansuffix__)
|
2006-11-25 09:33:55 -07:00
|
|
|
.br
|
|
|
|
|
\fI\*(xL\fP
|
