* Copyright (c) 1981 Regents of the University of California.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
static char sccsid
[] = "@(#)overlay.c 5.6 (Berkeley) 6/1/90";
# define min(a,b) (a < b ? a : b)
# define max(a,b) (a > b ? a : b)
* This routine writes win1 on win2 non-destructively.
reg WINDOW
*win1
, *win2
; {
reg
int x
, y
, endy
, endx
, starty
, startx
;
fprintf(outf
, "OVERLAY(%0.2o, %0.2o);\n", win1
, win2
);
starty
= max(win1
->_begy
, win2
->_begy
);
startx
= max(win1
->_begx
, win2
->_begx
);
endy
= min(win1
->_maxy
+ win1
->_begy
, win2
->_maxy
+ win2
->_begx
);
endx
= min(win1
->_maxx
+ win1
->_begx
, win2
->_maxx
+ win2
->_begx
);
fprintf(outf
, "OVERLAY:from (%d,%d) to (%d,%d)\n", starty
, startx
, endy
, endx
);
if (starty
>= endy
|| startx
>= endx
)
y1
= starty
- win1
->_begy
;
y2
= starty
- win2
->_begy
;
for (y
= starty
; y
< endy
; y
++, y1
++, y2
++) {
end
= &win1
->_y
[y1
][endx
- win1
->_begx
];
x
= startx
- win2
->_begx
;
for (sp
= &win1
->_y
[y1
][startx
- win1
->_begx
]; sp
< end
; sp
++) {
mvwaddch(win2
, y2
, x
, *sp
);