1 /* @(#)wwredrawwin.c 8.1 (Berkeley) 6/6/93 */ 2 /* $NetBSD: wwredrawwin.c,v 1.7 2003/08/07 11:17:44 agc Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Edward Wang at The University of California, Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "ww.h" 37 38 void 39 wwredrawwin1(struct ww *w, int row1, int row2, int offset) 40 { 41 int row; 42 int col; 43 unsigned char *smap; 44 union ww_char *buf; 45 char *win; 46 union ww_char *ns; 47 int x; 48 int nchanged; 49 50 for (row = row1; row < row2; row++) { 51 col = w->ww_i.l; 52 ns = wwns[row]; 53 smap = &wwsmap[row][col]; 54 buf = w->ww_buf[row + offset]; 55 win = w->ww_win[row]; 56 nchanged = 0; 57 for (; col < w->ww_i.r; col++) 58 if (*smap++ == w->ww_index && 59 ns[col].c_w != 60 (x = buf[col].c_w ^ win[col] << WWC_MSHIFT)) { 61 nchanged++; 62 ns[col].c_w = x; 63 } 64 if (nchanged > 0) 65 wwtouched[row] |= WWU_TOUCHED; 66 } 67 } 68