3 ms·

If there is no way to tell Wayland application that it should scale by fraction then application can't render with such scale, no? This leads me to assumption t

by marwis 5y ago

If there is no way to tell Wayland application that it should scale by fraction then application can't render with such scale, no? This leads me to assumption that fractional scaling happens at compositor. By native scaling I mean absolutely no bitmap scaling. If rendering happened at target scale then all pixels would match grid and no artifacts would be possible. I can't even imagine how ClearType could work with bitmap scaling when it targets individual subpixels. I think people have wildly different sensitivity to resolution. I know some that can't tell difference between 4k and 1080p and 1080p scaled on 4k screen. Some crazy people even think MacOS has good font rendering.

fsh 5y ago
No, the scaling is definitely done by the applications. I don't know how they do it, but it works. I don't think it is possible to avoid having lines "in between" pixels when using fractional scaling. The physical pixel grid simply does not always align with the one at "100%" scale. I specifically bought the 4K monitor to get crisp text rendering. Upscaling from 1080p (e.g. what XWayland does) is very noticeable to me. I don't see any difference between native Wayland fractional scaling, and setting Gnome to native resolution (except for the tiny UI elements).