filtering of flat textures

[Rose22]

Is there an existing issue for this?

• I have searched the existing issues

What feature are you suggesting?

right now flat textures (such as HUD elements) are a bit blurry and low res-looking when you're using higher internal resolution than 1x. it'd be nice to have some upscaling/filtering that looks nicer than standard bilinear - and maybe also an option to just use the textures from 1x so they look pixelated instead of blurry

Why would this feature be useful?

makes it look better

[amwatson]

Thanks! It's a fair point. Openxr on Quest has both a sharpening and a superresolution option, which should help with flat textures.

One reason I can't do it immediately is because it requires a slightly different rendering style (I'd need to copy into another buffer). Changes to Citra's core rendering need to wait until after I pull the latest changes from Citra mainline

[Haxorzz]

I'm not sure if whole-screen upscaling is that useful in this context because it will also degrade the game's visuals (lower internal resolution upscaled to higher resolution) and afaik you can't choose to only upscale textures selectively.

Citra originally had an "Anime4k" ai upscaler as a "texture filtering" option once that would upscale the textures (and only the textures) to look better. This has some performance drawbacks but it seems way better than the alternative, also missing are a bunch of other more traditional texture filtering options also available in normal Citra that some people could prefer over just Bilinear filtering.