/*	$OpenBSD: lib_bkgd.c,v 1.3 1997/12/03 05:21:12 millert Exp $	*/


/***************************************************************************
*                            COPYRIGHT NOTICE                              *
****************************************************************************
*                ncurses is copyright (C) 1992-1995                        *
*                          Zeyd M. Ben-Halim                               *
*                          zmbenhal@netcom.com                             *
*                          Eric S. Raymond                                 *
*                          esr@snark.thyrsus.com                           *
*                                                                          *
*        Permission is hereby granted to reproduce and distribute ncurses  *
*        by any means and for any fee, whether alone or as part of a       *
*        larger distribution, in source or in binary form, PROVIDED        *
*        this notice is included with any such distribution, and is not    *
*        removed from any of its header files. Mention of ncurses in any   *
*        applications linked with it is highly appreciated.                *
*                                                                          *
*        ncurses comes AS IS with no warranty, implied or expressed.       *
*                                                                          *
***************************************************************************/

#include <curses.priv.h>

MODULE_ID("Id: lib_bkgd.c,v 1.11 1997/10/18 19:03:49 tom Exp $")

void wbkgdset(WINDOW *win, chtype ch)
{
  T((T_CALLED("wbkgdset(%p,%s)"), win, _tracechtype(ch)));
    
  if (win) {
    chtype off = AttrOf(win->_bkgd);
    chtype on  = AttrOf(ch);
    
    toggle_attr_off(win->_attrs,off);
    toggle_attr_on (win->_attrs,on);
    
    if (TextOf(ch)==0)
      ch |= BLANK;
    win->_bkgd = ch;
  }
  returnVoid;
}

int wbkgd(WINDOW *win, const chtype ch)
{
  int code = ERR;
  int x, y;
  chtype new_bkgd = ch;

  T((T_CALLED("wbkgd(%p,%s)"), win, _tracechtype(new_bkgd)));

  if (win) {
    chtype old_bkgd = getbkgd(win);

    wbkgdset(win, new_bkgd);
    wattrset(win, AttrOf(win->_bkgd));
    
    for (y = 0; y <= win->_maxy; y++) {
      for (x = 0; x <= win->_maxx; x++) {
	if (win->_line[y].text[x] == old_bkgd)
	  win->_line[y].text[x] = win->_bkgd;
	else 
	  win->_line[y].text[x] =
	    _nc_render(win,(A_ALTCHARSET & 
			    AttrOf(win->_line[y].text[x])) 
		       | TextOf(win->_line[y].text[x]));
      }
    }
    touchwin(win);
    _nc_synchook(win);
    code = OK;
  }
  returnCode(code);
}