Re: [Linux-fbdev-devel] Re: FBdev updates.

Geert Uytterhoeven (geert@linux-m68k.org)
Fri, 21 Feb 2003 12:02:38 +0100 (MET)

On 21 Feb 2003, Antonino Daplas wrote:
> On Fri, 2003-02-21 at 17:09, Geert Uytterhoeven wrote:
> > On 21 Feb 2003, Antonino Daplas wrote:
> > > Note: I cannot test with 12x22 fonts in 2.4 because some/most drivers do
> > > not support it.
> >
> > Which specific drivers are you talking about? All drivers for popular cards
> > support fontwidth 12 (Matrox, ATI, nVidia, 3Dfx, Permedia, VESA, ...).
> >
> You're absolutely correct, I'm wondering why I thought that :-) Here's
> a benchmark for 12x22, and it's 2x slower than 8x16, 2.4.x or 2.5.x.
> Still, the 2.5.x version is slower than 2.4.x.

Because accel_putcs() falls back to individual character drawing if the
fontwidth is not a multiple of 8. Using one fb_imageblit() for other fontwidths
too would speed this up a lot (but needs some additional coding first).

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org


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


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/