curses_background(3) - NetBSD Manual Pages

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CURSES_BACKGROUND(3)    NetBSD Library Functions Manual   CURSES_BACKGROUND(3)


NAME

     curses_background, bkgd, bkgdset, getbkgd, wbkgd, wbkgdset -- curses
     attribute manipulation routines


LIBRARY

     Curses Library (libcurses, -lcurses)


SYNOPSIS

     #include <curses.h>

     int
     bkgd(chtype);

     int
     bkgdset(chtype);

     chtype
     getbkgd(WINDOW *);

     int
     wbkgd(chtype);

     int
     wbkgdset(chtype);


DESCRIPTION

     These functions manipulate the background attributes on stdscr or on the
     specified window.

     The function wbkgdset(win, ch) sets the background attributes of the
     specified window win to ch.

     The function wbkgd(win, ch) sets the background attributes of the speci-
     fied window win to ch and also sets the background attribute of every
     character position on that window.

     The functions bkgdset(ch) and bkgd(ch) are equivalent to wbkgdset(stdscr,
     ch) and wbkgd(stdscr, ch), respectively.

     When the background attributes are set on a window, characters are ren-
     dered with the logical OR of the background attributes and the charac-
     ter's attributes.  If both the background attribute and the character
     attribute contain color, the color of the character attribute is dis-
     played.  If the background attribute contains a non-space character, then
     this character is rendered where the foreground character is a space
     character.

     The function getbkgd(win) returns the background attributes for the win-
     dow win.


RETURN VALUES

     The functions wbkgdset() and wbkgd() return OK on success and ERR on
     failure.


SEE ALSO

     curses_attributes(3), curses_color(3)


STANDARDS

     The NetBSD Curses library complies with the X/Open Curses specification,
     part of the Single Unix Specification.


HISTORY

     These functions first appeared in NetBSD 1.6.

NetBSD 3.1.1                   October 13, 2002                   NetBSD 3.1.1