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bug#38394: Fwd: Use different image filtering when zooming in vs zooming
From: |
Alan Third |
Subject: |
bug#38394: Fwd: Use different image filtering when zooming in vs zooming out |
Date: |
Sun, 2 Aug 2020 21:35:15 +0100 |
On Sun, Aug 02, 2020 at 07:52:25PM +0200, Lars Ingebrigtsen wrote:
> Alan Third <alan@idiocy.org> writes:
>
> > It might be worth smoothing on scaling down, but not on scaling up.
> > That way if you zoom in you get exact pixels, but zooming out you
> > don’t get aliasing effects.
> >
> > I don’t know if that would add any other problems...
>
> You apparently didn't apply this patch?
There didn't appear to be much enthusiasm so I just left it in case
someone requested it in the future.
> > * src/image.c (image_set_transform [HAVE_XRENDER]): Use different filter
> > when zooming in vs zooming out.
>
> I think it makes sense... although I'm not sure of what the effects are
> if you just increase the image size by, say, a couple percent.
I've attached an updated version of this patch and a screenshot
showing the result with a couple of levels of scaling.
Annoyingly we now use Cairo by default which is unaffected by this
change, so only plain X users will see this behaviour.
--
Alan Third
scaling.png
Description: PNG image
0001-Don-t-smooth-images-when-scaling-up-bug-38394.patch
Description: Text document