NAME    [Toc]    [Back]

       bkgdset,  wbkgdset,  bkgd,  wbkgd, getbkgd - curses window
       background manipulation routines

SYNOPSIS    [Toc]    [Back]

       #include <curses.h>

       void bkgdset(const chtype ch);
       void wbkgdset(WINDOW *win, const chtype ch);
       int bkgd(const chtype ch);
       int wbkgd(WINDOW *win, const chtype ch);
       chtype getbkgd(WINDOW *win);

DESCRIPTION    [Toc]    [Back]

       The bkgdset and wbkgdset  routines  manipulate  the  background
  of  the  named window.  The window background is a
       chtype consisting of any combination of attributes  (i.e.,
       rendition)  and  a  character.   The attribute part of the
       background is combined (OR'ed) with all non-blank  characters
  that  are written into the window with waddch.  Both
       the character and attribute parts of  the  background  are
       combined   with  the  blank  characters.   The  background
       becomes a property of the character  and  moves  with  the
       character   through   any   scrolling   and  insert/delete
       line/character operations.

       To the extent  possible  on  a  particular  terminal,  the
       attribute  part  of  the  background  is  displayed as the
       graphic rendition of the character put on the screen.

       The bkgd and wbkgd functions set the  background  property
       of  the  current  or  specified window and then apply this
       setting to every character position in that window:

              The rendition of every character on the  screen  is
              changed to the new background rendition.

              Wherever  the  former background character appears,
              it is changed to the new background character.

       The getbkgd function returns the  given  window's  current
       background character/attribute pair.

RETURN VALUE    [Toc]    [Back]

       The  routines  bkgd  and wbkgd return the integer OK.  The
       SVr4.0 manual says "or a non-negative integer  if  immedok
       is set", but this appears to be an error.

NOTES    [Toc]    [Back]

       Note that bkgdset and bkgd may be macros.

PORTABILITY    [Toc]    [Back]

       These  functions are described in the XSI Curses standard,
       Issue 4.  The draft does not include const  qualifiers  on
       the arguments.  The standard specifies that bkgd and wbkgd
       return ERR, on failure. but gives no failure conditions.

SEE ALSO    [Toc]    [Back]

       curses(3), curs_addch(3), curs_outopts(3)