On Wed, 30 Jul 1997, Dan Espen wrote:
> Mark Borges <mdb_at_cdc.noaa.gov> writes:
> > We're still in the dark ages here with our 8bpp PseudoColor
> > Xterminals. Recently, I ran across this URL,
> >
> > http://c3-a.snvl1.sfba.home.com/ColormapFAQ.html
> >
> > which purported to eliminate colormap flashing when applications
> > install their own colormap (e.g., `netscape -install'). Unfortunately,
> > I don't see any difference at all. Will this "trick" not work with
> > fvwm? Has anyone else tried this with fvwm-2.0.45 and noticed a
> > difference? FWIW, I also tried using cmap_compact(1) (as mentioned in
> > the above URL), but that, too, had no visible effect.
>
> If you start netscape with -install, colormap flashing is inevitable.
> The URL you reference suggests "netscape -ncol nn", or using a static
> color map. I didn't see anything that would help the netscape
> installed colormap match the currently installed colormap. Even if
> the initial colormaps are close, I don't think they would remain close
> for long.
>
> I think you will end up living with "netscape -install" and the
> flashing. I don't think fvwm is doing anything to aggravate the
> problem.
It is, in a way. If you have fvwm print out the exact sequence of colormaps
it installs as you move the mouse into or out of a window with a private
colormap, it is less the optimal. The best would be to simply install the new
colormap and be done with it, but fvwm installs the new colormap, re-installs
the old one, and then does the new one again. It might even have been worse,
I don't remember exactly.
I tried to rewrite the colormap code once, because it is very broken with
respect to machines with multiple colormaps (SGI systems) or with non-top
level windows with different colormaps than their parents. However, X doesn't
like to give much information on the colormap hardware of the machine, with
minimum colormaps, maximum colormaps, and the (lame) colormap notify events
all fvwm has to go on, I couldn't figure out how to do it. fvwm also needs to
get enter and exit notify events for non-top level windows (ie. windows it
isn't managing) to do colormaps right.
|Gazing up to the breeze of the heavens \ on a quest, meaning, reason |
|came to be, how it begun \ all alone in the family of the sun |
|curiosity teasing everyone \ on our home, third stone from the sun. |
|Trent Piepho (xyzzy_at_u.washington.edu) -- Metallica |
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Received on Wed Jul 30 1997 - 14:41:31 BST