3 ms·

It's possible for an OS to support fractional scaling properly; just tell applications to render their windows 1.5 times larger, map the inputs properly, and tu

by pkulak 4y ago

It's possible for an OS to support fractional scaling properly; just tell applications to render their windows 1.5 times larger, map the inputs properly, and turn off font anti-aliasing. The problem is that it requires every app to be updated, which hasn't happened everywhere yet. Android and iOS, for example, do it perfectly. So does ChromeOS.

arinlen 4y ago
> (...) just tell applications to render their windows 1.5 times larger, map the inputs properly, and turn off font anti-aliasing. Doesn't disabling anti-aliasing make things look worse? Unintentional and random jagged lines never look right.
- adgjlsfhk1 4y ago
  anti-aliasing matters a lot less when you have a high resolution display.
  - arinlen 4y ago
    > anti-aliasing matters a lot less when you have a high resolution display. The original claim is that turning off anti-aliasing would make things look better, and not that it looks bad but not that bad. Even in high res displays, isn't it true that anti-aliasing makes things look better?
    - throwaway92394 4y ago
      Yes and no. Speaking generally about anti-aliasing, and the method it's done varies a lot in it's trade offs. Generally anti-aliasing is a trade off between pixelation, blurriness, and performance. The better the anti-aliasing and the higher the pixel count the slower the performance - this can be an issue and some GUI applications like some IDE's at high DPI's. Faster antialiasing methods will look worse. In an ideal world a high enough pixel density would mean the apparent pixelation is so low that anti-aliasing isn't necessary. Generally anti-aliasing means more blurry - although the amount of blur might not be an issue for you, it depends. The higher the DPI the less pixels that need to be "guessed" which gives you better precision, which is especially useful for vector graphics like text that have theoretically infinite precision. It really depends on how you define "better". Generally for text specifically I think most people prefer sharpness. This, combined with the much higher DPI display's we have nowadays I think we're at the point where for many people including myself, text looks better without antialiasing. Personally I think it's easier to read. tl;dr - it depends on how you define "better". At very high DPI's I think we're at a point where many people prefer the sharpness provided by the lack of AA compared to the artifacts that are now relatively tiny thanks to the high DPI. Also in some applications like Intellij I also have had performance issues with AA at high DPI's.
    - adgjlsfhk1 4y ago
      Anti-aliasing at the wrong resolution looks worse than not anti-aliasing at all. As such, if you tell your applications to render things larger than 1x scaling, anti-aliasing starts to hurt more than it helps.
- OctopusLupid 4y ago
  Is it possible GP was talking about sub-pixel font anti-aliasing, which would look wrong when scaled?
favadi 4y ago
Sadly, Linux doesn't support fractional scaling properly. This is a show stopper for me.
- imilk 4y ago
  Fractional scaling works pretty seamlessly for me using Pop OS on a Framework.
tadfisher 4y ago
Even Android maps "1dp" to a non-integer number of pixels on most displays. It looks "perfect" because of a combination of anti-aliasing and high density. But zoom in on a repeating pattern of 1dp lines, and you will see that some are aliased and some are not if your display's density is not an integer multiple of 160dpi (mdpi). But Android can do this everywhere because everything draws to a Skia canvas under the hood (well, HWComposer/SurfaceFlinger, but basically Skia). Desktop operating systems don't have the same luxury. MacOS and Gnome render at 2x and downscale the entire frame, which produces decent results on high-density displays but look blurry otherwise. I have no idea what Windows does but it sounds like it's a mess.

by pkulak 4y ago

arinlen 4y ago

> (...) just tell applications to render their windows 1.5 times larger, map the inputs properly, and turn off font anti-aliasing. Doesn't disabling anti-aliasing make things look worse? Unintentional and random jagged lines never look right.

adgjlsfhk1 4y ago
anti-aliasing matters a lot less when you have a high resolution display.
- arinlen 4y ago
  > anti-aliasing matters a lot less when you have a high resolution display. The original claim is that turning off anti-aliasing would make things look better, and not that it looks bad but not that bad. Even in high res displays, isn't it true that anti-aliasing makes things look better?
  - throwaway92394 4y ago
    Yes and no. Speaking generally about anti-aliasing, and the method it's done varies a lot in it's trade offs. Generally anti-aliasing is a trade off between pixelation, blurriness, and performance. The better the anti-aliasing and the higher the pixel count the slower the performance - this can be an issue and some GUI applications like some IDE's at high DPI's. Faster antialiasing methods will look worse. In an ideal world a high enough pixel density would mean the apparent pixelation is so low that anti-aliasing isn't necessary. Generally anti-aliasing means more blurry - although the amount of blur might not be an issue for you, it depends. The higher the DPI the less pixels that need to be "guessed" which gives you better precision, which is especially useful for vector graphics like text that have theoretically infinite precision. It really depends on how you define "better". Generally for text specifically I think most people prefer sharpness. This, combined with the much higher DPI display's we have nowadays I think we're at the point where for many people including myself, text looks better without antialiasing. Personally I think it's easier to read. tl;dr - it depends on how you define "better". At very high DPI's I think we're at a point where many people prefer the sharpness provided by the lack of AA compared to the artifacts that are now relatively tiny thanks to the high DPI. Also in some applications like Intellij I also have had performance issues with AA at high DPI's.
  - adgjlsfhk1 4y ago
    Anti-aliasing at the wrong resolution looks worse than not anti-aliasing at all. As such, if you tell your applications to render things larger than 1x scaling, anti-aliasing starts to hurt more than it helps.
OctopusLupid 4y ago
Is it possible GP was talking about sub-pixel font anti-aliasing, which would look wrong when scaled?

favadi 4y ago

Sadly, Linux doesn't support fractional scaling properly. This is a show stopper for me.

imilk 4y ago
Fractional scaling works pretty seamlessly for me using Pop OS on a Framework.

tadfisher 4y ago

Even Android maps "1dp" to a non-integer number of pixels on most displays. It looks "perfect" because of a combination of anti-aliasing and high density. But zoom in on a repeating pattern of 1dp lines, and you will see that some are aliased and some are not if your display's density is not an integer multiple of 160dpi (mdpi). But Android can do this everywhere because everything draws to a Skia canvas under the hood (well, HWComposer/SurfaceFlinger, but basically Skia). Desktop operating systems don't have the same luxury. MacOS and Gnome render at 2x and downscale the entire frame, which produces decent results on high-density displays but look blurry otherwise. I have no idea what Windows does but it sounds like it's a mess.