.\"***************************************************************************
-.\" Copyright (c) 1998-2013,2015 Free Software Foundation, Inc. *
+.\" Copyright 2020-2021,2022 Thomas E. Dickey *
+.\" Copyright 1998-2013,2015 Free Software Foundation, Inc. *
.\" *
.\" Permission is hereby granted, free of charge, to any person obtaining a *
.\" copy of this software and associated documentation files (the *
.\" authorization. *
.\"***************************************************************************
.\"
-.\" $Id: curs_overlay.3x,v 1.18 2015/07/21 00:51:31 tom Exp $
+.\" $Id: curs_overlay.3x,v 1.22 2022/02/12 20:05:11 tom Exp $
.TH curs_overlay 3X ""
.na
.hy 0
.SH NAME
-\fBoverlay\fR,
-\fBoverwrite\fR,
-\fBcopywin\fR \- overlay and manipulate overlapped \fBcurses\fR windows
+\fBoverlay\fP,
+\fBoverwrite\fP,
+\fBcopywin\fP \- overlay and manipulate overlapped \fBcurses\fP windows
.ad
.hy
.SH SYNOPSIS
-\fB#include <curses.h>\fR
+\fB#include <curses.h>\fP
.sp
-\fBint overlay(const WINDOW *\fP\fIsrcwin\fP\fB, WINDOW *\fP\fIdstwin\fP\fB);\fR
+\fBint overlay(const WINDOW *\fIsrcwin\fB, WINDOW *\fIdstwin\fB);\fR
.br
-\fBint overwrite(const WINDOW *\fP\fIsrcwin\fP\fB, WINDOW *\fP\fIdstwin\fP\fB);\fR
+\fBint overwrite(const WINDOW *\fIsrcwin\fB, WINDOW *\fIdstwin\fB);\fR
.br
-\fBint copywin(const WINDOW *\fP\fIsrcwin\fP\fB, WINDOW *\fP\fIdstwin\fP\fB, int \fP\fIsminrow\fP\fB,\fR
- \fBint \fP\fIsmincol\fP\fB, int \fP\fIdminrow\fP\fB, int \fP\fIdmincol\fP\fB, int \fP\fIdmaxrow\fP\fB,\fR
- \fBint \fP\fIdmaxcol\fP\fB, int \fP\fIoverlay\fP\fB);\fR
+\fBint copywin(const WINDOW *\fIsrcwin\fB, WINDOW *\fIdstwin\fB, int \fIsminrow\fB,\fR
+ \fBint \fIsmincol\fB, int \fIdminrow\fB, int \fIdmincol\fB, int \fIdmaxrow\fB,\fR
+ \fBint \fIdmaxcol\fB, int \fIoverlay\fB);\fR
.SH DESCRIPTION
.SS overlay, overwrite
-The \fBoverlay\fR and \fBoverwrite\fR routines overlay \fIsrcwin\fR on
-top of \fIdstwin\fR.
-\fIscrwin\fR and \fIdstwin\fR are not required
+The \fBoverlay\fP and \fBoverwrite\fP routines overlay \fIsrcwin\fP on
+top of \fIdstwin\fP.
+\fIscrwin\fP and \fIdstwin\fP are not required
to be the same size; only text where the two windows overlap is copied.
-The difference is that \fBoverlay\fR is non-destructive
-(blanks are not copied) whereas \fBoverwrite\fR is destructive.
+The difference is that \fBoverlay\fP is non-destructive
+(blanks are not copied) whereas \fBoverwrite\fP is destructive.
.SS copywin
.PP
-The \fBcopywin\fR routine provides a finer granularity of control over the
-\fBoverlay\fR and \fBoverwrite\fR routines.
-As in the \fBprefresh\fR routine,
-a rectangle is specified in the destination window, (\fIdminrow\fR,
-\fIdmincol\fR) and (\fIdmaxrow\fR, \fIdmaxcol\fR), and the upper-left-corner
-coordinates of the source window, (\fIsminrow\fR, \fIsmincol\fR).
-If the argument \fIoverlay\fR is \fBtrue\fR,
+The \fBcopywin\fP routine provides a finer granularity of control over the
+\fBoverlay\fP and \fBoverwrite\fP routines.
+As in the \fBprefresh\fP routine,
+a rectangle is specified in the destination window, (\fIdminrow\fP,
+\fIdmincol\fP) and (\fIdmaxrow\fP, \fIdmaxcol\fP), and the upper-left-corner
+coordinates of the source window, (\fIsminrow\fP, \fIsmincol\fP).
+If the argument \fIoverlay\fP is \fBtrue\fP,
then copying is non-destructive,
-as in \fBoverlay\fR.
+as in \fBoverlay\fP.
.SH RETURN VALUE
-Routines that return an integer return \fBERR\fR upon failure, and \fBOK\fR
-(SVr4 only specifies "an integer value other than \fBERR\fR") upon successful
+Routines that return an integer return \fBERR\fP upon failure, and \fBOK\fP
+(SVr4 only specifies "an integer value other than \fBERR\fP") upon successful
completion.
.PP
X/Open defines no error conditions.
if either of the window pointers are null, or
if some part of the window would be placed off-screen.
.SH NOTES
-Note that \fBoverlay\fR and \fBoverwrite\fR may be macros.
+Note that \fBoverlay\fP and \fBoverwrite\fP may be macros.
.SH PORTABILITY
The XSI Curses standard, Issue 4 describes these functions (adding the const
qualifiers).
It further specifies their behavior in the presence of characters
with multibyte renditions (not yet supported in this implementation).
.SH SEE ALSO
-\fBcurses\fR(3X), \fBcurs_pad\fR(3X), \fBcurs_refresh\fR(3X)
+\fBcurses\fP(3X), \fBcurs_pad\fP(3X), \fBcurs_refresh\fP(3X)