xref: /dflybsd-src/usr.bin/window/wwredrawwin.c (revision 86d7f5d305c6adaa56ff4582ece9859d73106103)
186d7f5d3SJohn Marino /*	@(#)wwredrawwin.c	8.1 (Berkeley) 6/6/93	*/
286d7f5d3SJohn Marino /*	$NetBSD: wwredrawwin.c,v 1.7 2003/08/07 11:17:44 agc Exp $	*/
386d7f5d3SJohn Marino 
486d7f5d3SJohn Marino /*
586d7f5d3SJohn Marino  * Copyright (c) 1983, 1993
686d7f5d3SJohn Marino  *	The Regents of the University of California.  All rights reserved.
786d7f5d3SJohn Marino  *
886d7f5d3SJohn Marino  * This code is derived from software contributed to Berkeley by
986d7f5d3SJohn Marino  * Edward Wang at The University of California, Berkeley.
1086d7f5d3SJohn Marino  *
1186d7f5d3SJohn Marino  * Redistribution and use in source and binary forms, with or without
1286d7f5d3SJohn Marino  * modification, are permitted provided that the following conditions
1386d7f5d3SJohn Marino  * are met:
1486d7f5d3SJohn Marino  * 1. Redistributions of source code must retain the above copyright
1586d7f5d3SJohn Marino  *    notice, this list of conditions and the following disclaimer.
1686d7f5d3SJohn Marino  * 2. Redistributions in binary form must reproduce the above copyright
1786d7f5d3SJohn Marino  *    notice, this list of conditions and the following disclaimer in the
1886d7f5d3SJohn Marino  *    documentation and/or other materials provided with the distribution.
1986d7f5d3SJohn Marino  * 3. Neither the name of the University nor the names of its contributors
2086d7f5d3SJohn Marino  *    may be used to endorse or promote products derived from this software
2186d7f5d3SJohn Marino  *    without specific prior written permission.
2286d7f5d3SJohn Marino  *
2386d7f5d3SJohn Marino  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2486d7f5d3SJohn Marino  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2586d7f5d3SJohn Marino  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2686d7f5d3SJohn Marino  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2786d7f5d3SJohn Marino  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2886d7f5d3SJohn Marino  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2986d7f5d3SJohn Marino  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
3086d7f5d3SJohn Marino  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3186d7f5d3SJohn Marino  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3286d7f5d3SJohn Marino  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3386d7f5d3SJohn Marino  * SUCH DAMAGE.
3486d7f5d3SJohn Marino  */
3586d7f5d3SJohn Marino 
3686d7f5d3SJohn Marino #include "ww.h"
3786d7f5d3SJohn Marino 
3886d7f5d3SJohn Marino void
wwredrawwin1(struct ww * w,int row1,int row2,int offset)3986d7f5d3SJohn Marino wwredrawwin1(struct ww *w, int row1, int row2, int offset)
4086d7f5d3SJohn Marino {
4186d7f5d3SJohn Marino 	int row;
4286d7f5d3SJohn Marino 	int col;
4386d7f5d3SJohn Marino 	unsigned char *smap;
4486d7f5d3SJohn Marino 	union ww_char *buf;
4586d7f5d3SJohn Marino 	char *win;
4686d7f5d3SJohn Marino 	union ww_char *ns;
4786d7f5d3SJohn Marino 	int x;
4886d7f5d3SJohn Marino 	int nchanged;
4986d7f5d3SJohn Marino 
5086d7f5d3SJohn Marino 	for (row = row1; row < row2; row++) {
5186d7f5d3SJohn Marino 		col = w->ww_i.l;
5286d7f5d3SJohn Marino 		ns = wwns[row];
5386d7f5d3SJohn Marino 		smap = &wwsmap[row][col];
5486d7f5d3SJohn Marino 		buf = w->ww_buf[row + offset];
5586d7f5d3SJohn Marino 		win = w->ww_win[row];
5686d7f5d3SJohn Marino 		nchanged = 0;
5786d7f5d3SJohn Marino 		for (; col < w->ww_i.r; col++)
5886d7f5d3SJohn Marino 			if (*smap++ == w->ww_index &&
5986d7f5d3SJohn Marino 			    ns[col].c_w !=
6086d7f5d3SJohn Marino 			    (x = buf[col].c_w ^ win[col] << WWC_MSHIFT)) {
6186d7f5d3SJohn Marino 				nchanged++;
6286d7f5d3SJohn Marino 				ns[col].c_w = x;
6386d7f5d3SJohn Marino 			}
6486d7f5d3SJohn Marino 		if (nchanged > 0)
6586d7f5d3SJohn Marino 			wwtouched[row] |= WWU_TOUCHED;
6686d7f5d3SJohn Marino 	}
6786d7f5d3SJohn Marino }
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