Re: color_content after init_pair with -1

[Thomas Dickey]

On Sun, 24 Sep 2006, Sadrul H Chowdhury wrote:

> Hi.
>
> I am doing "init_pair(GNT_COLOR_NORMAL, -1, -1);" if "use_default_colors();"
> returns OK. Now, when I want to dump the contents of the screen in HTML, I
> do
>
> /* START */
> now = mvwinch(curscr, y, x);
> pair_content(PAIR_NUMBER(now & A_COLOR), &fg, &bg);
> color_content(fg, &r, &g, &b);
> /* END */
>
> Doing "pair_content" rightly sets fg and bg to -1 when (now & A_COLOR) is
> "GNT_COLOR_NORMAL". But doing "color_content" on -1 fails to get the
> appropriate RGB values. From the man-page for "color_content", I see that
> the first parameter is allowed a value between 0 and COLORS. So I am
> wondering whether there's a way I can get the color-contents for -1.

Not really: "-1" tells ncurses that you don't really know.
The assumed-color extension can tell it what you assume,
and given the comment here, it's likely that I didn't feed _that_ 
information into color_content().  But with no assumed-color,
the best that I could see for color_content() would either to return
an error, or to set r = g = b = -1;


--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net