linux-kernel - Re: console font limits

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Date:	Tue, 1 May 2007 13:49:21 +0200 (CEST)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Albert Cahalan <acahalan@...il.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>, aeb@....nl,
	hpa@...or.com
Subject: Re: console font limits

On Tue, 1 May 2007, Albert Cahalan wrote:
> I'm having problems with a font I just created. It's a rather big one,
> intended for a framebuffer console in UTF-8 mode. The strace program
> reports that /bin/setfont fails on a KDFONTOP ioctl with EINVAL.
> In reading the kernel code, I find this:
> 
> vt.c:static int con_font_set(struct vc_data *vc, struct console_font_op *op)
> vt.c-{
> vt.c-   struct console_font font;
> vt.c-   int rc = -EINVAL;
> vt.c-   int size;
> vt.c-
> vt.c-   if (vc->vc_mode != KD_TEXT)
> vt.c-           return -EINVAL;
> vt.c-   if (!op->data)
> vt.c-           return -EINVAL;
> vt.c-   if (op->charcount > 512)
> vt.c-           return -EINVAL;
> 
> Ouch. Why is the old VGA limit being applied to the framebuffer console?
> Could this just get removed? I dearly hope we aren't still storing the
> framebuffer data as two bytes per character+attribute pair.

The shadow screen (accessed using scr_*()) still uses the old VGA
format.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-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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