lib_bkgd.c revision 76726 
1/****************************************************************************
2 * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
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13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
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28
29/****************************************************************************
30 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
31 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
32 ****************************************************************************/
33
34#include <curses.priv.h>
35
36MODULE_ID("$Id: lib_bkgd.c,v 1.14 2000/12/10 02:43:26 tom Exp $")
37
38NCURSES_EXPORT(void)
39wbkgdset(WINDOW *win, chtype ch)
40{
41    T((T_CALLED("wbkgdset(%p,%s)"), win, _tracechtype(ch)));
42
43    if (win) {
44	chtype off = AttrOf(win->_bkgd);
45	chtype on = AttrOf(ch);
46
47	toggle_attr_off(win->_attrs, off);
48	toggle_attr_on(win->_attrs, on);
49
50	if (TextOf(ch) == 0)
51	    ch |= BLANK;
52	win->_bkgd = ch;
53    }
54    returnVoid;
55}
56
57NCURSES_EXPORT(int)
58wbkgd(WINDOW *win, const chtype ch)
59{
60    int code = ERR;
61    int x, y;
62    chtype new_bkgd = ch;
63
64    T((T_CALLED("wbkgd(%p,%s)"), win, _tracechtype(new_bkgd)));
65
66    if (win) {
67	chtype old_bkgd = getbkgd(win);
68
69	wbkgdset(win, new_bkgd);
70	wattrset(win, AttrOf(win->_bkgd));
71
72	for (y = 0; y <= win->_maxy; y++) {
73	    for (x = 0; x <= win->_maxx; x++) {
74		if (win->_line[y].text[x] == old_bkgd)
75		    win->_line[y].text[x] = win->_bkgd;
76		else
77		    win->_line[y].text[x] =
78			_nc_render(win, (A_ALTCHARSET &
79					 AttrOf(win->_line[y].text[x]))
80				   | TextOf(win->_line[y].text[x]));
81	    }
82	}
83	touchwin(win);
84	_nc_synchook(win);
85	code = OK;
86    }
87    returnCode(code);
88}
89