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background.c revision 1.10 
      1 /*	$NetBSD: background.c,v 1.10 2007/01/21 13:25:36 jdc Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Julian Coleman.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 #ifndef lint
     41 __RCSID("$NetBSD: background.c,v 1.10 2007/01/21 13:25:36 jdc Exp $");
     42 #endif				/* not lint */
     43 
     44 #include "curses.h"
     45 #include "curses_private.h"
     46 
     47 /*
     48  * bkgdset
     49  *	Set new background attributes on stdscr.
     50  */
     51 void
     52 bkgdset(chtype ch)
     53 {
     54 	wbkgdset(stdscr, ch);
     55 }
     56 
     57 /*
     58  * bkgd --
     59  *	Set new background and new background attributes on stdscr.
     60  */
     61 int
     62 bkgd(chtype ch)
     63 {
     64 	return(wbkgd(stdscr, ch));
     65 }
     66 
     67 /*
     68  * wbkgdset
     69  *	Set new background attributes.
     70  */
     71 void
     72 wbkgdset(WINDOW *win, chtype ch)
     73 {
     74 #ifdef DEBUG
     75 	__CTRACE(__CTRACE_ATTR, "wbkgdset: (%p), '%s', %08x\n",
     76 	    win, unctrl(ch & +__CHARTEXT), ch & __ATTRIBUTES);
     77 #endif
     78 
     79 	/* Background character. */
     80 	if (ch & __CHARTEXT)
     81 		win->bch = (wchar_t) ch & __CHARTEXT;
     82 
     83 	/* Background attributes (check colour). */
     84 	if (__using_color && !(ch & __COLOR))
     85 		ch |= __default_color;
     86 	win->battr = (attr_t) ch & __ATTRIBUTES;
     87 }
     88 
     89 /*
     90  * wbkgd --
     91  *	Set new background and new background attributes.
     92  */
     93 int
     94 wbkgd(WINDOW *win, chtype ch)
     95 {
     96 	int	y, x;
     97 
     98 #ifdef DEBUG
     99 	__CTRACE(__CTRACE_ATTR, "wbkgd: (%p), '%s', %08x\n",
    100 	    win, unctrl(ch & +__CHARTEXT), ch & __ATTRIBUTES);
    101 #endif
    102 
    103 	/* Background attributes (check colour). */
    104 	if (__using_color && !(ch & __COLOR))
    105 		ch |= __default_color;
    106 
    107 	win->battr = (attr_t) ch & __ATTRIBUTES;
    108 	wbkgdset(win, ch);
    109 	for (y = 0; y < win->maxy; y++)
    110 		for (x = 0; x < win->maxx; x++) {
    111 			/* Copy character if space */
    112 			if (ch & A_CHARTEXT && win->lines[y]->line[x].ch == ' ')
    113 				win->lines[y]->line[x].ch = ch & __CHARTEXT;
    114 			/* Merge attributes */
    115 			if (win->lines[y]->line[x].attr & __ALTCHARSET)
    116 				win->lines[y]->line[x].attr =
    117 				    (ch & __ATTRIBUTES) | __ALTCHARSET;
    118 			else
    119 				win->lines[y]->line[x].attr =
    120 				    ch & __ATTRIBUTES;
    121 		}
    122 	__touchwin(win);
    123 	return(OK);
    124 }
    125 
    126 /*
    127  * getbkgd --
    128  *	Get current background attributes.
    129  */
    130 chtype
    131 getbkgd(WINDOW *win)
    132 {
    133 	attr_t	battr;
    134 
    135 	/* Background attributes (check colour). */
    136 	battr = win->battr & A_ATTRIBUTES;
    137 	if (__using_color && ((battr & __COLOR) == __default_color))
    138 		battr &= ~__default_color;
    139 
    140 	return ((chtype) ((win->bch & A_CHARTEXT) | battr));
    141 }
    142