projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 15637ed4 RG |
1 | /* |
| 2 | * Copyright (c) 1981 Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 32 | */ | |
| 33 | ||
| 34 | #ifndef lint | |
| 35 | static char sccsid[] = "@(#)overlay.c 5.6 (Berkeley) 6/1/90"; | |
| 36 | #endif /* not lint */ | |
| 37 | ||
| 38 | # include "curses.ext" | |
| 15637ed4 RG |
39 | |
| 40 | # define min(a,b) (a < b ? a : b) | |
| 41 | # define max(a,b) (a > b ? a : b) | |
| 42 | ||
| 43 | /* | |
| 44 | * This routine writes win1 on win2 non-destructively. | |
| 45 | * | |
| 46 | */ | |
| 47 | overlay(win1, win2) | |
| 48 | reg WINDOW *win1, *win2; { | |
| 49 | ||
| 78ed81a3 | 50 | reg chtype *sp, *end; |
| 15637ed4 RG |
51 | reg int x, y, endy, endx, starty, startx; |
| 52 | reg int y1,y2; | |
| 53 | ||
| 54 | # ifdef DEBUG | |
| 55 | fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2); | |
| 56 | # endif | |
| 57 | starty = max(win1->_begy, win2->_begy); | |
| 58 | startx = max(win1->_begx, win2->_begx); | |
| 59 | endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begx); | |
| 60 | endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx); | |
| 61 | # ifdef DEBUG | |
| 62 | fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx); | |
| 63 | # endif | |
| 64 | if (starty >= endy || startx >= endx) | |
| 65 | return; | |
| 66 | y1 = starty - win1->_begy; | |
| 67 | y2 = starty - win2->_begy; | |
| 68 | for (y = starty; y < endy; y++, y1++, y2++) { | |
| 69 | end = &win1->_y[y1][endx - win1->_begx]; | |
| 70 | x = startx - win2->_begx; | |
| 71 | for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) { | |
| 78ed81a3 | 72 | if (*sp != ' ') |
| 15637ed4 RG |
73 | mvwaddch(win2, y2, x, *sp); |
| 74 | x++; | |
| 75 | } | |
| 76 | } | |
| 77 | } |