'\" te
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.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
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.TH BKGD 3XCURSES "Jun 5, 2002"
.SH NAME
bkgd, bkgdset, getbkgd, wbkgd, wbkgdset \- set or get the background character
(and rendition) of window
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR... ] \fIfile\fR... \fB-I\fR /usr/xpg4/include \fB -L \fR /usr/xpg4/lib \e
\fB -R \fR /usr/xpg4/lib \fB -lcurses \fR [ \fIlibrary\fR... ]

\fBc89\fR [ \fIflag\fR... ] \fIfile\fR... \fB-lcurses\fR [ \fIlibrary\fR... ]

#include <curses.h>

\fBint\fR \fBbkgd\fR(\fBchtype\fR \fIch\fR);
.fi

.LP
.nf
\fBvoid\fR \fBbkgdset\fR(\fBchtype\fR \fIch\fR);
.fi

.LP
.nf
\fBchtype\fR \fBgetbkgd\fR(\fBWINDOW *\fR\fIwin\fR);
.fi

.LP
.nf
\fBint\fR \fBwbkgd\fR(\fBWINDOW *\fR\fIwin\fR, \fBchtype\fR \fIch\fR);
.fi

.LP
.nf
\fBvoid\fR \fBwbkgdset\fR(\fBWINDOW *\fR\fIwin\fR, \fBchtype\fR \fIch\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBbkgdset()\fR and \fBwbkgdset()\fR functions turn off the previous
background attributes, logical OR the requested attributes into the window
rendition, and set the background property of the current or specified window
based on the information in \fIch\fR. If \fIch\fR refers to a multi-column
character, the results are undefined.
.sp
.LP
The \fBbkgd()\fR and \fBwbkgd()\fR functions turn off the previous background
attributes, logical OR the requested attributes into the window rendition, and
set the background property of the current or specified window and then apply
this setting to every character position in that window:
.RS +4
.TP
.ie t \(bu
.el o
The rendition of every character on the screen is changed to the new window
rendition.
.RE
.RS +4
.TP
.ie t \(bu
.el o
Wherever the former background character appears, it is changed to the new
background character.
.RE
.sp
.LP
The \fBgetbkgd()\fR function extracts the specified window's background
character and rendition.
.SH PARAMETERS
.sp
.ne 2
.na
\fB\fIch\fR\fR
.ad
.RS 7n
Is the background character to be set.
.RE

.sp
.ne 2
.na
\fB\fIwin\fR\fR
.ad
.RS 7n
Is a pointer to the window in which the background character is to  be set.
.RE

.SH RETURN VALUES
.sp
.LP
Upon successful completion, the \fBbkgd()\fR and \fBwbkgd()\fR functions return
\fBOK\fR. Otherwise, they return \fBERR\fR.
.sp
.LP
The \fBbkgdset()\fR and \fBwbkgdset()\fR functions do not return a value.
.sp
.LP
Upon successful completion, the \fBgetbkgd()\fR function returns the specified
window's background character and rendition. Otherwise, it returns
\fB(chtype)\fR\fBERR\fR.
.SH ERRORS
.sp
.LP
No errors are defined.
.SH USAGE
.sp
.LP
These functions are only guaranteed to operate reliably on character sets in
which each character fits into a single byte, whose attributes can be expressed
using only constants with the A_ prefix.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	Unsafe
.TE

.SH SEE ALSO
.sp
.LP
\fBaddch\fR(3XCURSES), \fBaddchstr\fR(3XCURSES), \fBattroff\fR(3XCURSES),
\fBbkgrnd\fR(3XCURSES), \fBclear\fR(3XCURSES), \fBclrtoeol\fR(3XCURSES),
\fBclrtobot\fR(3XCURSES), \fBerase\fR(3XCURSES), \fBinch\fR(3XCURSES),
\fBlibcurses\fR(3XCURSES), \fBmvprintw\fR(3XCURSES), \fBattributes\fR(5),
\fBstandards\fR(5)