bug#38394: Fwd: Use different image filtering when zooming in vs zooming out

[Alan Third]

On Fri, Aug 14, 2020 at 08:03:04AM +0200, David Ponce wrote:
> Hello,
> 
> With this patch applied
> (https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=519a93e067f459ceddb57573261a52118086b73d),
> I noticed that small icon images look bad with image defaut
> attributes, but look as expected when I add the attribute :scale 1
> (see the attached screenshots). The issue is that by default on an
> HiDPI screen, images are scaled up (in my configuration the default
> scale is 1.2).
> 
> I don't know if there is a way to force the smoothing behavior, if
> not, maybe an image attribute could be considered ?

Is this on X?

Maybe we should only go to nearest neighbour when the scaling is >= 2?
Or greater than the scale factor? Hmm, I'm not sure what's best here.
-- 
Alan Third