WinUAE 4.4 SSF2 AGA shifted pixel

Octopus66 · 01 January 2021, 16:48

Hi Toni - I can see a shifted pixel on SSF2 AGA with WinUAE 4.4. This does not occur with WinUAE 3.5.

It is quite hard to see in the screenshot but should be very clear in game. https://ibb.co/PGW69C6

Any else can confirm?
Thanks

DamienD · 02 January 2021, 18:31

Hmmm, just looked at the same screenshot on Lemon Amiga and it looks similar to your sshot:

I also tried in 4.4.0 and 3.5.0; and they are identical:

v4.4.0:

v3.5.0:

Octopus66 · 02 January 2021, 19:04

Thanks for checking Damien. I have uploaded a video to show what I mean. Only seems to happen on right side of screen.... weird.

[ Show youtube player ]

DamienD · 02 January 2021, 20:10

Ok, if I jump then I see it:

https://streamable.com/6bvfck

Toni Wilen · 02 January 2021, 20:48

I am not yet sure whats the problem exactly. Could you attach 2 screenshots, one that appears to be wrong and another than isn't. Without filters, without scanlines, integer pixel mapping (1:1 or 2:2 and so on)

Which version (preferably which beta) introduced it? Does latest 4.5 beta have same problem? Does ticking "subpixel emulation" in chipset panel change anything?

Octopus66 · 02 January 2021, 22:37

Hi Toni - Happy New Year.

Subpixel emulation fixes the issue in 4.4.
Most recent 4.5 beta (14) behaves in the same way as 4.4.

2 screenshots attached showing the issue
https://ibb.co/c8hqrh6 (Timer 22 --> subpixel emulation on)
https://ibb.co/K5VP3rq (Timer 17 --> subpixel emulation off)

Trust this is enough to look at? Not sure how to set-up 1x1 perfect screengrabs to be honest.

This did not happen in 4.3 so must have been introduced with 4.4

01 January 2021, 16:48	#1
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	WinUAE 4.4 SSF2 AGA shifted pixel Hi Toni - I can see a shifted pixel on SSF2 AGA with WinUAE 4.4. This does not occur with WinUAE 3.5. It is quite hard to see in the screenshot but should be very clear in game. https://ibb.co/PGW69C6 Any else can confirm? Thanks

02 January 2021, 22:37	#6
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	Hi Toni - Happy New Year. Subpixel emulation fixes the issue in 4.4. Most recent 4.5 beta (14) behaves in the same way as 4.4. 2 screenshots attached showing the issue https://ibb.co/c8hqrh6 (Timer 22 --> subpixel emulation on) https://ibb.co/K5VP3rq (Timer 17 --> subpixel emulation off) Trust this is enough to look at? Not sure how to set-up 1x1 perfect screengrabs to be honest. This did not happen in 4.3 so must have been introduced with 4.4 Last edited by Octopus66; 02 January 2021 at 23:07.

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02 January 2021, 18:31	#2
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Hmmm, just looked at the same screenshot on Lemon Amiga and it looks similar to your sshot: I also tried in 4.4.0 and 3.5.0; and they are identical: *v4.4.0:* *v3.5.0:*

02 January 2021, 19:04	#3
Octopus66 Registered User Join Date: Feb 2016 Location: London Posts: 335	Thanks for checking Damien. I have uploaded a video to show what I mean. Only seems to happen on right side of screen.... weird. [ Show youtube player ]

02 January 2021, 20:10	#4
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Ok, if I jump then I see it: https://streamable.com/6bvfck

02 January 2021, 20:48	#5
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,502	I am not yet sure whats the problem exactly. Could you attach 2 screenshots, one that appears to be wrong and another than isn't. Without filters, without scanlines, integer pixel mapping (1:1 or 2:2 and so on) Which version (preferably which beta) introduced it? Does latest 4.5 beta have same problem? Does ticking "subpixel emulation" in chipset panel change anything?

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