# Re: clipping

- From: Geert Uytterhoeven \<geert@linux-m68k.org\>
- Date: 2003-01-08 09:56:51 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2003/01/13450709
- Thread: https://ratatoskr.run/linux-fbdev/2002/12/13450664/t.md

```text
On Tue, 7 Jan 2003, James Simmons wrote:
> > > > BTW, do we really need clipping in fb_ops.fb_{fillrect,copyarea,imageblit}()?
> > > Personally, I don't think we need clipping.  I tried removing it before
> > > (circa linux-2.5.30+), but the console segfaults whenever I decrease
> > > var->yres_virtual.  I haven't tried this again with the newest
> > > framebuffer framework though.
> > 
> > Any definitive answer on this?
> > 
> > What happens if you resize the VT to such a large size that columns*fontwidth >
> > xres_virtual or rows*fontheight > yres_virtual? I guess clipping prevents a
> > crash there?
> 
> Correct. Actually fbcon_resize checks to make sure the user doesn't do 
> something stupid like this. So we might not needed. Hm.

And what if you use fbset to reduce the resolution below what's needed to
accomodate the current console size?

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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