2006-11-25 09:33:55 -07:00
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.\" 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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2013-04-28 10:55:55 -06:00
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.ft CW
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2006-11-25 09:33:55 -07:00
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.\".ps \\n(PS
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.\".if \\n(VS>=40 .vs \\n(VSu
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.\".if \\n(VS<=39 .vs \\n(VSp
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..
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.de De
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.ce 0
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.if \\n(BD .DF
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.nr BD 0
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.in \\n(OIu
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.if \\n(TM .ls 2
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.sp \\n(DDu
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.fi
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..
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.de IN \" send an index entry to the stderr
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..
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.de Pn
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.ie t \\$1\fB\^\\$2\^\fR\\$3
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.el \\$1\fI\^\\$2\^\fP\\$3
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..
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.de ZN
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.ie t \fB\^\\$1\^\fR\\$2
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.el \fI\^\\$1\^\fP\\$2
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..
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.de hN
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.ie t <\fB\\$1\fR>\\$2
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.el <\fI\\$1\fP>\\$2
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..
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.ny0
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.TH XmbTextExtents __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"
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.SH NAME
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XmbTextExtents, XwcTextExtents, Xutf8TextExtents \- compute text extents
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.SH SYNTAX
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.HP
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int XmbTextExtents\^(\^XFontSet \fIfont_set\fP\^, char *\fIstring\fP\^, int
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\fInum_bytes\fP\^, XRectangle *\fIoverall_ink_return\fP\^, XRectangle
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*\fIoverall_logical_return\fP\^);
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.HP
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int XwcTextExtents\^(\^XFontSet \fIfont_set\fP\^, wchar_t *\fIstring\fP\^, int
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\fInum_wchars\fP\^, XRectangle *\fIoverall_ink_return\fP\^, XRectangle
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*\fIoverall_logical_return\fP\^);
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.HP
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int Xutf8TextExtents\^(\^XFontSet \fIfont_set\fP\^, char *\fIstring\fP\^, int
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\fInum_bytes\fP\^, XRectangle *\fIoverall_ink_return\fP\^, XRectangle
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*\fIoverall_logical_return\fP\^);
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.SH ARGUMENTS
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.IP \fIfont_set\fP 1i
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Specifies the font set.
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.IP \fInum_bytes\fP 1i
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Specifies the number of bytes in the string argument.
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.IP \fInum_wchars\fP 1i
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Specifies the number of characters in the string argument.
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.ds Ov dimensions
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.IP \fIoverall_ink_return\fP 1i
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Returns the overall ink \*(Ov.
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.IP \fIoverall_logical_return\fP 1i
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Returns the overall logical \*(Ov.
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.IP \fIstring\fP 1i
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Specifies the character string.
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.SH DESCRIPTION
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The
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.ZN XmbTextExtents ,
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.ZN XwcTextExtents
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and
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.ZN Xutf8TextExtents
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functions set the components of the specified overall_ink_return and
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overall_logical_return
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arguments to the overall bounding box of the string's image
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and a logical bounding box for spacing purposes, respectively.
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They return the value returned by
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.ZN XmbTextEscapement ,
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.ZN XwcTextEscapement
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or
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.ZN Xutf8TextEscapement .
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These metrics are relative to the drawing origin of the string,
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using the fonts loaded for the specified font set.
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.LP
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If the overall_ink_return argument is non-NULL,
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it is set to the bounding box of the string's character ink.
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The overall_ink_return for a nondescending, horizontally drawn
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Latin character is conventionally entirely above the baseline;
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that is, overall_ink_return.height <= \-overall_ink_return.y.
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The overall_ink_return for a nonkerned character
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is entirely at, and to the right of, the origin;
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that is, overall_ink_return.x >= 0.
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A character consisting of a single pixel at the origin would set
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overall_ink_return fields y = 0, x = 0, width = 1, and height = 1.
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.LP
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If the overall_logical_return argument is non-NULL,
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it is set to the bounding box that provides minimum spacing
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to other graphical features for the string.
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Other graphical features, for example, a border surrounding the text,
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should not intersect this rectangle.
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.LP
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When the
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.ZN XFontSet
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has missing charsets,
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metrics for each unavailable character are taken
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from the default string returned by
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.ZN XCreateFontSet
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so that the metrics represent the text as it will actually be drawn.
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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 Xutf8TextExtents
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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 "SEE ALSO"
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2010-05-18 13:37:28 -06:00
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XmbTextEscapement(__libmansuffix__),
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XmbTextPerCharExtents(__libmansuffix__)
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2006-11-25 09:33:55 -07:00
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\fI\*(xL\fP
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