bkgrndset man page on OpenBSD

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curs_bkgrnd(3)							curs_bkgrnd(3)

       bkgrnd, wbkgrnd, bkgrndset, wbkgrndset, getbkgrnd, wgetbkgrnd - curses
       window complex background manipulation routines

       #include <curses.h>

       int bkgrnd( const cchar_t *wch);
       int wbkgrnd( WINDOW *win, const cchar_t *wch);
       void bkgrndset(const cchar_t *wch );
       void wbkgrndset(WINDOW *win, const cchar_t *wch);
       int getbkgrnd(cchar_t *wch);
       int wgetbkgrnd(WINDOW *win, cchar_t *wch);

       The bkgrndset and wbkgrndset routines manipulate the background of the
       named window.  The window background is a cchar_t consisting of any
       combination of attributes (i.e., rendition) and a complex 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 bkgrnd and wbkgrnd 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 getbkgrnd function returns the given window's current background
       character/attribute pair via the wch pointer.

       Note that bkgrnd, bkgrndset, and getbkgrnd may be macros.

       The bkgrndset and wbkgrndset routines do not return a value.

       Upon successful completion, the other functions return OK.  Otherwise,
       they return ERR.	 A null window pointer is treated as an error.

       curses(3), curs_bkgd(3)

								 March 1, 2011

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