978ab4ad4e
cell, as they are merged when characters are added. Remove the per cell storage and clarify the manual page. Pointed out by ruibiao@.
142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/* $NetBSD: background.c,v 1.9 2006/01/15 11:43:54 jdc Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Julian Coleman.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: background.c,v 1.9 2006/01/15 11:43:54 jdc Exp $");
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#endif /* not lint */
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#include "curses.h"
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#include "curses_private.h"
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/*
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* bkgdset
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* Set new background attributes on stdscr.
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*/
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void
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bkgdset(chtype ch)
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{
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wbkgdset(stdscr, ch);
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}
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/*
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* bkgd --
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* Set new background and new background attributes on stdscr.
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*/
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int
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bkgd(chtype ch)
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{
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return(wbkgd(stdscr, ch));
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}
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/*
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* wbkgdset
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* Set new background attributes.
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*/
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void
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wbkgdset(WINDOW *win, chtype ch)
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{
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#ifdef DEBUG
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__CTRACE("wbkgdset: (%p), '%s', %08x\n",
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win, unctrl(ch & +__CHARTEXT), ch & __ATTRIBUTES);
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#endif
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/* Background character. */
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if (ch & __CHARTEXT)
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win->bch = (wchar_t) ch & __CHARTEXT;
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/* Background attributes (check colour). */
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if (__using_color && !(ch & __COLOR))
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ch |= __default_color;
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win->battr = (attr_t) ch & __ATTRIBUTES;
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}
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/*
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* wbkgd --
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* Set new background and new background attributes.
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*/
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int
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wbkgd(WINDOW *win, chtype ch)
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{
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int y, x;
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#ifdef DEBUG
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__CTRACE("wbkgd: (%p), '%s', %08x\n",
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win, unctrl(ch & +__CHARTEXT), ch & __ATTRIBUTES);
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#endif
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/* Background attributes (check colour). */
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if (__using_color && !(ch & __COLOR))
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ch |= __default_color;
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win->battr = (attr_t) ch & __ATTRIBUTES;
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wbkgdset(win, ch);
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for (y = 0; y < win->maxy; y++)
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for (x = 0; x < win->maxx; x++) {
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/* Copy character if space */
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if (ch & A_CHARTEXT && win->lines[y]->line[x].ch == ' ')
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win->lines[y]->line[x].ch = ch & __CHARTEXT;
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/* Merge attributes */
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if (win->lines[y]->line[x].attr & __ALTCHARSET)
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win->lines[y]->line[x].attr =
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(ch & __ATTRIBUTES) | __ALTCHARSET;
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else
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win->lines[y]->line[x].attr =
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ch & __ATTRIBUTES;
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}
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__touchwin(win);
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return(OK);
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}
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/*
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* getbkgd --
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* Get current background attributes.
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*/
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chtype
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getbkgd(WINDOW *win)
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{
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attr_t battr;
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/* Background attributes (check colour). */
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battr = win->battr & A_ATTRIBUTES;
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if (__using_color && ((battr & __COLOR) == __default_color))
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battr &= ~__default_color;
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return ((chtype) ((win->bch & A_CHARTEXT) | battr));
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}
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