227 lines
6.6 KiB
Groff
227 lines
6.6 KiB
Groff
.\" Copyright \(co 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1994, 1996 X Consortium
|
|
.\" Copyright \(co 2000 The XFree86 Project, Inc.
|
|
.\"
|
|
.\" 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 XmbTextExtents __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
|
|
.SH NAME
|
|
XmbTextExtents, XwcTextExtents, Xutf8TextExtents \- compute text extents
|
|
.SH SYNTAX
|
|
.HP
|
|
int XmbTextExtents\^(\^XFontSet \fIfont_set\fP\^, char *\fIstring\fP\^, int
|
|
\fInum_bytes\fP\^, XRectangle *\fIoverall_ink_return\fP\^, XRectangle
|
|
*\fIoverall_logical_return\fP\^);
|
|
.HP
|
|
int XwcTextExtents\^(\^XFontSet \fIfont_set\fP\^, wchar_t *\fIstring\fP\^, int
|
|
\fInum_wchars\fP\^, XRectangle *\fIoverall_ink_return\fP\^, XRectangle
|
|
*\fIoverall_logical_return\fP\^);
|
|
.HP
|
|
int Xutf8TextExtents\^(\^XFontSet \fIfont_set\fP\^, char *\fIstring\fP\^, int
|
|
\fInum_bytes\fP\^, XRectangle *\fIoverall_ink_return\fP\^, XRectangle
|
|
*\fIoverall_logical_return\fP\^);
|
|
.SH ARGUMENTS
|
|
.IP \fIfont_set\fP 1i
|
|
Specifies the font set.
|
|
.IP \fInum_bytes\fP 1i
|
|
Specifies the number of bytes in the string argument.
|
|
.IP \fInum_wchars\fP 1i
|
|
Specifies the number of characters in the string argument.
|
|
.ds Ov dimensions
|
|
.IP \fIoverall_ink_return\fP 1i
|
|
Returns the overall ink \*(Ov.
|
|
.IP \fIoverall_logical_return\fP 1i
|
|
Returns the overall logical \*(Ov.
|
|
.IP \fIstring\fP 1i
|
|
Specifies the character string.
|
|
.SH DESCRIPTION
|
|
The
|
|
.ZN XmbTextExtents ,
|
|
.ZN XwcTextExtents
|
|
and
|
|
.ZN Xutf8TextExtents
|
|
functions set the components of the specified overall_ink_return and
|
|
overall_logical_return
|
|
arguments to the overall bounding box of the string's image
|
|
and a logical bounding box for spacing purposes, respectively.
|
|
They return the value returned by
|
|
.ZN XmbTextEscapement ,
|
|
.ZN XwcTextEscapement
|
|
or
|
|
.ZN Xutf8TextEscapement .
|
|
These metrics are relative to the drawing origin of the string,
|
|
using the fonts loaded for the specified font set.
|
|
.LP
|
|
If the overall_ink_return argument is non-NULL,
|
|
it is set to the bounding box of the string's character ink.
|
|
The overall_ink_return for a nondescending, horizontally drawn
|
|
Latin character is conventionally entirely above the baseline;
|
|
that is, overall_ink_return.height <= \-overall_ink_return.y.
|
|
The overall_ink_return for a nonkerned character
|
|
is entirely at, and to the right of, the origin;
|
|
that is, overall_ink_return.x >= 0.
|
|
A character consisting of a single pixel at the origin would set
|
|
overall_ink_return fields y = 0, x = 0, width = 1, and height = 1.
|
|
.LP
|
|
If the overall_logical_return argument is non-NULL,
|
|
it is set to the bounding box that provides minimum spacing
|
|
to other graphical features for the string.
|
|
Other graphical features, for example, a border surrounding the text,
|
|
should not intersect this rectangle.
|
|
.LP
|
|
When the
|
|
.ZN XFontSet
|
|
has missing charsets,
|
|
metrics for each unavailable character are taken
|
|
from the default string returned by
|
|
.ZN XCreateFontSet
|
|
so that the metrics represent the text as it will actually be drawn.
|
|
The behavior for an invalid codepoint is undefined.
|
|
.LP
|
|
The function
|
|
.ZN Xutf8TextExtents
|
|
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 "SEE ALSO"
|
|
XmbTextEscapement(__libmansuffix__),
|
|
XmbTextPerCharExtents(__libmansuffix__)
|
|
\fI\*(xL\fP
|