Re: [Linux-fbdev-devel] Type confusion in fbcon

Geert Uytterhoeven (geert@linux-m68k.org)
Mon, 23 Dec 2002 22:17:43 +0100 (MET)

On 23 Dec 2002, David S. Miller wrote:
> On Mon, 2002-12-23 at 01:18, Geert Uytterhoeven wrote:
> > That's because originally there was no fix.line_length field, and the line
> > length was derived from var.xres_virtual and var.bits_per_pixel.
> >
> > With some hardware, the line length must be a multiple of 32 or 64 bits, and we
> > needed a way to specify that, so fix.line_length was introduced. If it was
> > zero, user code should fallback to the old behavior.
>
> And with some cards, the line length is constant. Ie. to get to
> "X, Y + 1" for a given "X, Y" you add a constant to your current
> frame buffer pointer.
>
> That is what fix.line_length is for right?

Yep.

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


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