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Annotation of 43BSDReno/usr.bin/window/wwredrawwin.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Edward Wang at The University of California, Berkeley.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: static char sccsid[] = "@(#)wwredrawwin.c      3.16 (Berkeley) 6/6/90";
        !            25: #endif /* not lint */
        !            26: 
        !            27: #include "ww.h"
        !            28: 
        !            29: wwredrawwin1(w, row1, row2, offset)
        !            30: register struct ww *w;
        !            31: int row1, row2, offset;
        !            32: {
        !            33:        int row;
        !            34:        register col;
        !            35:        register char *smap;
        !            36:        register union ww_char *buf;
        !            37:        register char *win;
        !            38:        register union ww_char *ns;
        !            39:        int x;
        !            40:        int nchanged;
        !            41: 
        !            42:        for (row = row1; row < row2; row++) {
        !            43:                col = w->ww_i.l;
        !            44:                ns = wwns[row];
        !            45:                smap = &wwsmap[row][col];
        !            46:                buf = w->ww_buf[row + offset];
        !            47:                win = w->ww_win[row];
        !            48:                nchanged = 0;
        !            49:                for (; col < w->ww_i.r; col++)
        !            50:                        if (*smap++ == w->ww_index &&
        !            51:                            ns[col].c_w !=
        !            52:                            (x = buf[col].c_w ^ win[col] << WWC_MSHIFT)) {
        !            53:                                nchanged++;
        !            54:                                ns[col].c_w = x;
        !            55:                        }
        !            56:                if (nchanged > 0)
        !            57:                        wwtouched[row] |= WWU_TOUCHED;
        !            58:        }
        !            59: }

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