bkgd(3ncurses) [x11r4 man page]

bkgd(3NCURSES)                                                                                                                      bkgd(3NCURSES)

NAME

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

SYNOPSIS

       #include <curses.h>

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

DESCRIPTION

       The  bkgdset and wbkgdset routines manipulate the background of the named window.  The window background is a chtype consisting of any com-
       bination 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 charac-
       ter 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

       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

       Note that bkgdset and bkgd may be macros.

PORTABILITY

       These functions are described in the XSI Curses standard, Issue 4.  It specifies that bkgd and wbkgd return ERR on failure,  but  gives  no
       failure conditions.

SEE ALSO

       ncurses(3NCURSES), addch(3NCURSES), attr(3NCURSES), outopts(3NCURSES)

                                                                                                                                    bkgd(3NCURSES)