Please file a minimum sample using your font to double-check on our side

@timunie It's the default font. But this also happens with a custom font I have so I assume it affects all fonts.

I reproduced it using dotnet new avalonia.app and then updating to 11.1.0-beta1

With 11.0.10:

With 11.1.0-beta1:

Second image has no ClearType enabled

Just to be clear, the only change I made was the version number of the Avalonia packages.

similar
#14711

Yeah seems to be a duplicate of #14711 .

@Gillibald I'll leave it to you if you want to close that issue in favor of the other one

Is it actually a duplicate? I opened a separate issue because I am not seeing a difference in the font rendering in the other screenshot, just different boldness. But maybe my eyes are deceiving me.

Such issue reports are not helping. I need a minimal repro I can run as is without building some full blown up application.

https://github.com/rabbitism/FontDiffIssue
https://github.com/rabbitism/AvaloniaIssueRepro/tree/main/FontRenderIssue
Here is the repro, run both projects and compare closely.

Such issue reports are not helping. I need a minimal repro I can run as is without building some full blown up application.

Your own hello world template reproduces the issue, I don't see the problem.

Looks like ClearType doesn't work for some reason.

Tested with 11.1.0-beta2 in the repo example. It's still fuzzy.

https://github.com/rabbitism/AvaloniaIssueRepro/tree/main/FontRenderIssue

Also it's easy to see if you just open the Avalonio DevTools

The problem here is related to Skia(Sharp):

• https://issues.skia.org/issues/327877721 causes rendering artifact for Sliders, ProgressBar and similar controls (Slider with custom style leaves spots outside of its bounds #14270)
• The only way to fix those is to force an extra intermediate layer for rendering via SKCanvas.SaveLayer (Reworked the way we are clipping dirty rects with CompositionTarget #14806)
• SKCanvas.SaveLayer disables subpixel rendering
• No subpixel rendering results in bad-looking fonts

This API is required to make sub pixel rendering work with layers: https://api.skia.org/structSkCanvas_1_1SaveLayerRec.html

One can currently set CompositionOptions.UseSaveLayerRootClip = false to disable the extra intermediate layer and get font rendering back to normal - at the expense of some rendering artifacts in some situations.

My feeling is that CompositionOptions.UseSaveLayerRootClip = false should be the default for now, until we can fix the problem at its source.