286 lines
7.5 KiB
C
286 lines
7.5 KiB
C
/****************************************************************************
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* apps/graphics/pdcurses/pdc_bkgd.c
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* Public Domain Curses
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* RCSID("$Id: bkgd.c,v 1.39 2008/07/13 16:08:18 wmcbrine Exp $")
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Adapted by: Gregory Nutt <gnutt@nuttx.org>
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*
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* Adapted from the original public domain pdcurses by Gregory Nutt and
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* released as part of NuttX under the 3-clause BSD license:
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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****************************************************************************/
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/* Name: bkgd
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*
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* Synopsis:
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* int bkgd(chtype ch);
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* void bkgdset(chtype ch);
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* chtype getbkgd(WINDOW *win);
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* int wbkgd(WINDOW *win, chtype ch);
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* void wbkgdset(WINDOW *win, chtype ch);
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*
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* int bkgrnd(const cchar_t *wch);
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* void bkgrndset(const cchar_t *wch);
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* int getbkgrnd(cchar_t *wch);
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* int wbkgrnd(WINDOW *win, const cchar_t *wch);
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* void wbkgrndset(WINDOW *win, const cchar_t *wch);
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* int wgetbkgrnd(WINDOW *win, cchar_t *wch);
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*
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* Description:
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* bkgdset() and wbkgdset() manipulate the background of a window.
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* The background is a chtype consisting of any combination of
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* attributes and a character; it is combined with each chtype
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* added or inserted to the window by waddch() or winsch(). Only
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* the attribute part is used to set the background of non-blank
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* characters, while both character and attributes are used for
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* blank positions.
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*
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* bkgd() and wbkgd() not only change the background, but apply it
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* immediately to every cell in the window.
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*
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* The attributes that are defined with the attrset()/attron() set
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* of functions take precedence over the background attributes if
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* there is a conflict (e.g., different color pairs).
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*
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* Return Value:
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* bkgd() and wbkgd() return OK, unless the window is NULL, in
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* which case they return ERR.
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*
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* Portability X/Open BSD SYS V
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* bkgd Y - 4.0
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* bkgdset Y - 4.0
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* getbkgd Y
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* wbkgd Y - 4.0
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* wbkgdset Y - 4.0
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* bkgrnd Y
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* bkgrndset Y
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* getbkgrnd Y
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* wbkgrnd Y
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* wbkgrndset Y
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* wgetbkgrnd Y
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "curspriv.h"
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int wbkgd(WINDOW *win, chtype ch)
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{
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int x;
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int y;
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chtype oldcolr;
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chtype oldch;
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chtype newcolr;
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chtype newch;
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chtype colr;
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chtype attr;
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chtype oldattr = 0;
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chtype newattr = 0;
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chtype *winptr;
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PDC_LOG(("wbkgd() - called\n"));
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if (!win)
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{
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return ERR;
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}
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if (win->_bkgd == ch)
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{
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return OK;
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}
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oldcolr = win->_bkgd & A_COLOR;
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if (oldcolr)
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{
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oldattr = (win->_bkgd & A_ATTRIBUTES) ^ oldcolr;
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}
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oldch = win->_bkgd & A_CHARTEXT;
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wbkgdset(win, ch);
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newcolr = win->_bkgd & A_COLOR;
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if (newcolr)
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{
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newattr = (win->_bkgd & A_ATTRIBUTES) ^ newcolr;
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}
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newch = win->_bkgd & A_CHARTEXT;
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/* What follows is what seems to occur in the System V implementation of
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* this routine.
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*/
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for (y = 0; y < win->_maxy; y++)
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{
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for (x = 0; x < win->_maxx; x++)
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{
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winptr = win->_y[y] + x;
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ch = *winptr;
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/* Determine the colors and attributes of the character read from
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* the window.
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*/
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colr = ch & A_COLOR;
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attr = ch & (A_ATTRIBUTES ^ A_COLOR);
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/* If the color is the same as the old background color, then make
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* it the new background color, otherwise leave it.
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*/
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if (colr == oldcolr)
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{
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colr = newcolr;
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}
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/* Remove any attributes (non color) from the character that were
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* part of the old background, then combine the remaining ones with
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* the new background */
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attr ^= oldattr;
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attr |= newattr;
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/* Change character if it is there because it was the old background
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* character.
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*/
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ch &= A_CHARTEXT;
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if (ch == oldch)
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{
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ch = newch;
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}
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ch |= (attr | colr);
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*winptr = ch;
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}
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}
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touchwin(win);
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PDC_sync(win);
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return OK;
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}
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int bkgd(chtype ch)
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{
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PDC_LOG(("bkgd() - called\n"));
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return wbkgd(stdscr, ch);
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}
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void wbkgdset(WINDOW *win, chtype ch)
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{
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PDC_LOG(("wbkgdset() - called\n"));
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if (win)
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{
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if (!(ch & A_CHARTEXT))
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{
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ch |= ' ';
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}
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win->_bkgd = ch;
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}
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}
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void bkgdset(chtype ch)
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{
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PDC_LOG(("bkgdset() - called\n"));
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wbkgdset(stdscr, ch);
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}
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chtype getbkgd(WINDOW *win)
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{
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PDC_LOG(("getbkgd() - called\n"));
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return win ? win->_bkgd : (chtype) ERR;
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}
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#ifdef CONFIG_PDCURSES_WIDE
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int wbkgrnd(WINDOW *win, const cchar_t *wch)
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{
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PDC_LOG(("wbkgrnd() - called\n"));
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return wch ? wbkgd(win, *wch) : ERR;
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}
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int bkgrnd(const cchar_t *wch)
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{
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PDC_LOG(("bkgrnd() - called\n"));
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return wbkgrnd(stdscr, wch);
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}
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void wbkgrndset(WINDOW *win, const cchar_t *wch)
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{
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PDC_LOG(("wbkgdset() - called\n"));
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if (wch)
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{
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wbkgdset(win, *wch);
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}
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}
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void bkgrndset(const cchar_t *wch)
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{
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PDC_LOG(("bkgrndset() - called\n"));
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wbkgrndset(stdscr, wch);
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}
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int wgetbkgrnd(WINDOW *win, cchar_t *wch)
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{
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PDC_LOG(("wgetbkgrnd() - called\n"));
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if (!win || !wch)
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{
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return ERR;
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}
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*wch = win->_bkgd;
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return OK;
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}
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int getbkgrnd(cchar_t *wch)
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{
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PDC_LOG(("getbkgrnd() - called\n"));
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return wgetbkgrnd(stdscr, wch);
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}
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#endif
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