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Copyright 1989 AT&T
Portions Copyright (c) 1996, Sun Microsystems, Inc. All Rights Reserved.
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.
You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
curs_overlay, overlay, overwrite, copywin - overlap and manipulate overlapped curses windows

cc [ flag ... ] file ... -lcurses [ library ... ]
#include <curses.h>

int overlay(WINDOW *srcwin, WINDOW *dstwin);

int overwrite(WINDOW *srcwin, WINDOW *dstwin);

int copywin(WINDOW *srcwin, WINDOW *dstwin, int sminrow,
 int smincol, int dminrow, int dmincol,
 int dmaxrow, int dmaxcol, int overlay);

The overlay() and overwrite() routines overlay srcwin on top of dstwin. scrwin and dstwin are not required to be the same size; only text where the two windows overlap is copied. The difference is that overlay() is non-destructive (blanks are not copied) whereas overwrite() is destructive.

The copywin() routine provides a finer granularity of control over the overlay() and overwrite() routines. Like in the prefresh() routine, a rectangle is specified in the destination window, (dminrow, dmincol) and (dmaxrow, dmaxcol), and the upper-left-corner coordinates of the source window, (sminrow, smincol). If the argument overlay is true, then copying is non-destructive, as in overlay().

Routines that return an integer return ERR upon failure and an integer value other than ERR upon successful completion.

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
MT-Level	Unsafe

curs_pad(3CURSES), curs_refresh(3CURSES), curses(3CURSES), attributes(5)

The header <curses.h> automatically includes the headers <stdio.h> and <unctrl.h>.

Note that overlay() and overwrite may be macros.