CURSES_BACKGROUND(3) | 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);

void
`bkgdset`(chtype);

chtype
`getbkgd`(WINDOW *);

int
`wbkgd`(WINDOW *, chtype);

void
`wbkgdset`(WINDOW *, 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.

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

Note that subwindows created from win inherit the background attributes of win.

The function `wbkgd`(win, ch) sets the background attributes of the specified window win to ch and also sets the rendition of every character position on that window, as if the characters had been newly added to win. The rendition of characters on subwindows of win is also set to ch.

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

The function `getbkgd`(win) returns the background attributes for the window win.

# RETURN VALUES

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

# SEE ALSO

curses_attributes(3), curses_color(3), curses_window(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.

September 29, 2018 | NetBSD 9.2