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[] = "from: @(#)overlay.c 5.6 (Berkeley) 6/1/90";*/ 36 static char rcsid[] = "$Id: overlay.c,v 1.3 1993/08/01 18:35:29 mycroft Exp $"; 37 #endif /* not lint */ 38 39 # include "curses.ext" 40 41 # define min(a,b) (a < b ? a : b) 42 # define max(a,b) (a > b ? a : b) 43 44 /* 45 * This routine writes win1 on win2 non-destructively. 46 * 47 */ 48 overlay(win1, win2) 49 reg WINDOW *win1, *win2; { 50 51 reg chtype *sp, *end; 52 reg int x, y, endy, endx, starty, startx; 53 reg int y1,y2; 54 55 # ifdef DEBUG 56 fprintf(outf, "OVERLAY(%0.2o, %0.2o);\n", win1, win2); 57 # endif 58 starty = max(win1->_begy, win2->_begy); 59 startx = max(win1->_begx, win2->_begx); 60 endy = min(win1->_maxy + win1->_begy, win2->_maxy + win2->_begx); 61 endx = min(win1->_maxx + win1->_begx, win2->_maxx + win2->_begx); 62 # ifdef DEBUG 63 fprintf(outf, "OVERLAY:from (%d,%d) to (%d,%d)\n", starty, startx, endy, endx); 64 # endif 65 if (starty >= endy || startx >= endx) 66 return; 67 y1 = starty - win1->_begy; 68 y2 = starty - win2->_begy; 69 for (y = starty; y < endy; y++, y1++, y2++) { 70 end = &win1->_y[y1][endx - win1->_begx]; 71 x = startx - win2->_begx; 72 for (sp = &win1->_y[y1][startx - win1->_begx]; sp < end; sp++) { 73 if (*sp != ' ') 74 mvwaddch(win2, y2, x, *sp); 75 x++; 76 } 77 } 78 } 79