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-   -   WinUAE 4.3.0 - Automatic scaling options cause vertical judder (http://eab.abime.net/showthread.php?t=102115)

WDeranged 05 May 2020 17:40

WinUAE 4.3.0 - Automatic scaling options cause vertical judder
 
I recently updated and while I'm loving the new low latency modes I'm having an issue with the autoscaling options in the filters panel.

It doesn't seem to matter which one I choose, any of the options which automatically resize the screen give me a small vertical judder. Most noticeable in the intro to Turrican 2, when the logo moves to the top of the screen.

Does anyone know what could be going on?

Rotareneg 05 May 2020 18:51

The lagless vsync modes will always have some tearing near the top edge of the monitor due to the way they work. You'll need to scale the image down a bit so it doesn't reach all the way to the edges of the screen.

WDeranged 05 May 2020 21:35

Quote:

Originally Posted by Rotareneg (Post 1397835)
The lagless vsync modes will always have some tearing near the top edge of the monitor due to the way they work. You'll need to scale the image down a bit so it doesn't reach all the way to the edges of the screen.

Thanks for the reply. This isn't just tearing, it's more of a stutter. The logo starts moving, stops and then jumps to the top of the screen rather than smoothly scrolling.

Vsync modes don't make any difference, and using any other scaling mode solves the problem. It's purely the auto-scale modes that cause it.

Toni Wilen 05 May 2020 21:42

Thats normal because scrolling usually includes changing hidden display size which will confuse autoscale. You can see same effect for example when you try to drag WB screen up and down.

In other words, due to way Amiga display works (there is no static/known borders like in most other systems), it is impossible to detect between display size changing and scrolling in many situations.

WDeranged 05 May 2020 21:49

Quote:

Originally Posted by Toni Wilen (Post 1397882)
Thats normal because scrolling usually includes changing hidden display size which will confuse autoscale. You can see same effect for example when you try to drag WB screen up and down.

In other words, due to way Amiga display works (there is no static/known borders like in most other systems), it is impossible to detect between display size changing and scrolling in many situations.

Ahh. I was starting to suspect it was due to this. Thanks Toni.


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