Hi Adam,
On Mon, Jul 23, 2018 at 12:42 PM Adam Borowski <kilobyte@xxxxxxxxxx> wrote:
> On Mon, Jul 23, 2018 at 10:53:29AM +0200, Geert Uytterhoeven wrote:
> > On Sat, Jul 21, 2018 at 11:39 PM Adam Borowski <kilobyte@xxxxxxxxxx> wrote:
> > > Technically, every console can be made to blink by drawing/clearing affected
> > > characters a few times per second, but that'd be quite a waste of coding
> > > time and kernel size. There's a reason browsers dropped support for <blink>
> > > and text-decoration:blink.
> >
> > It's very simple and fast to implement in fbcon for FB_TYPE_PLANES or
> > FB_TYPE_INTERLEAVED_PLANES and FB_VISUAL_PSEUDOCOLOR ;-)
>
> Interesting... I'm still not going to do the effort to implement that
> (which would require learning fbdev internals first), though. But while I
> dislike this feature, someone else might want it.
>
> The main problem here is that there are only 8 or 7 bits available for
> attributes, thus it's better to use them for something more useful. And
> here, fbcon already interprets this bit as bright background, thus this
> patchset makes vt use it instead of non-existant blink.
Even better that they are mutually exclusive ;-) So it can work fine with
only 4 bitplanes.
That means bitplane 3 means either bright background (palette[8..15] are
the extra-bright versions of palette[0..7]) or blinking (palette[8..15]
alternate between palette[0..7] and all zeroes).
> There'll be more bits available once attributes get migrated into uniscr --
> either 11 or 32 bits depending on chosen implementation. But I still
> wouldn't go too wild with them: the console is meant for recovery tasks as
> on any properly working system you can have an X terminal configured for
> pixel-to-pixel identical behaviour as anything console can do. Thus, only
> cheap improvements to attributes make sense. This patchset is currently at
> +3 net lines, this certainly counts as cheap.
Assumed all those systems are sufficiently powerful to still run X
(said the guy who once ran X with mem=2M on his Amiga, just to prove it could
work ;-)
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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