Horizontal centering problem

[Supamax]

Hi Toni,
I always have WB windows moved to the right, not horizontally centered (see attached picture). (*)
I see no improvements if I select Display / Centering / Horizontal.

I remember having this "issue" years ago, and Toni solved it.

(*) EDIT: not only WB but all games, too

[chip]

Just use Filter option "Horizontal position"

[rutra80]

Or try Auto integer scaling, or different overscan option.

[Supamax]

Originally Posted by rutra80

Or try Auto integer scaling, or different overscan option.

I get decent centering only when seleting Overscan "Extreme".
I'm sure (I remember) there is a better option... then why the two options (in the Display menu) Centering/Horizontal and Centering/Vertical have absolutely no effect?
I remember they worked, years ago.

EDIT: I can't find the Auto integer scaling you mentioned...

[Toni Wilen]

Originally Posted by Supamax

Hi Toni,
I always have WB windows moved to the right, not horizontally centered (see attached picture). (*)
I see no results even if I select Display / Centering / Horizontal.

I remember having this "issue" years ago, and you solved it.

(*) EDIT: not only WB but all games, too

I don't think has anything to do with 4.9.9 betas which means: wrong thread. This is not generic help thread.

[Supamax]

Originally Posted by Toni Wilen

I don't think has anything to do with 4.9.9 betas which means: wrong thread. This is not generic help thread.

Sorry .
I remember having the same issue some years ago, then you changed something in your beta and it was solved/much better.
Now I'm seeing it again...

[Toni Wilen]

Originally Posted by Supamax

Sorry .
I remember having the same issue some years ago, then you changed something in your beta and it was solved/much better.
Now I'm seeing it again...

Does 4.9.1 work differently than latest beta? If it does: it is on topic but it is also required to include which beta was introduced it.

[Supamax]

Originally Posted by Toni Wilen

Does 4.9.1 work differently than latest beta?

No, same behaviour, you're right, it's not beta related .

If it does: it is on topic but it is also required to include which beta was introduced it.

I can do a research between the (many) past final versions, if it can be useful...
I'll do it, just in case.

[Toni Wilen]

Moved to separate thread.

[Supamax]

Originally Posted by Toni Wilen

Moved to separate thread.

Thanks .

I found the old thread I opened, years ago, about the same issue I noticed in one of your old betas:
https://eab.abime.net/showthread.php?t=60052

There was a "solution" (changing the Graphics API), but now it's not resolutive anymore...

[Supamax]

About the centering problem I mentioned, take a look at the attached screenshot of an A500 config with no filters etc., just default config, running my Dragon's Lair original disks (.scp).
It's definitely off-center!
Here I'm having both horizontal and vertical shifting.

[Snoopy1234]

Originally Posted by Supamax

About the centering problem I mentioned, take a look at the attached screenshot of an A500 config with no filters etc., just default config, running my Dragon's Lair original disks (.scp).
It's definitely off-center!
Here I'm having both horizontal and vertical shifting.

Have a look at the actual display resolution vs expected resolution. I guess we all think the monitor processes the numbers and translates it to suit. It doesn't work that way because the video output of machines and the monitor resolution have never been standardized. They're actually different systems. The numbers need to match or be evenly divisible across the machine and display.

[TCD]

Originally Posted by Supamax

About the centering problem I mentioned, take a look at the attached screenshot of an A500 config with no filters etc., just default config, running my Dragon's Lair original disks (.scp).
It's definitely off-center!
Here I'm having both horizontal and vertical shifting.

That's normal. There's no common starting point where pixels are drawn on screen. The Amiga can use a lot of different resolutions and that's why the image is 'off-center'. You'll have to use the filter panel if you want a perfectly centered image for each game.

[ross]

Originally Posted by TCD

The Amiga can use a lot of different resolutions..

[/philosophizing mode on]
In fact we should agree on whether the Amiga has 'infinite' video resolutions or only one where the pixel is visible every (multiple) of 35ns with some possible color selections depending on the chipset.
Technically using programmed modes Denise could also emit a continuous stream of pixels if duly pumped by Agnus.
[/philosophizing mode off]

Back to reality.. I wonder if there is a device where Dragon's Lair is centered, because the video window values are 'wrong'.
So centering should be done manually and so also in WinUAE

[TCD]

Originally Posted by ross

Back to reality.. I wonder if there is a device where Dragon's Lair is centered, because the video window values are 'wrong'.
So centering should be done manually and so also in WinUAE

I'm still waiting for you to write that 'perfect cut out screenshot/window' algorithm which could also be used to center things I guess

[ross]

Originally Posted by TCD

I'm still waiting for you to write that 'perfect cut out screenshot/window' algorithm which could also be used to center things I guess

Nah, if it were that simple it would already be implemented in WinUAE

The problem is that with Amiga it's not trivial what is on the visible window and what is not (copper makes everything damn hard, and the DIW registers can only give you a rough idea).
I imagine if Toni implemented an automatic centering algorithm he would be inundated with warnings that the screen is not in the right place basically half of the times.
Some games/demos change 'centering' in real time several times during their run!

An example could be the latest Batman Group demo: if you tried to do an automatic centering it would be a real disaster, just observe what happens in the DMA debugger

[TCD]

*sigh* Manually cropping screenshots and offsetting the display it is then Thank you for the insight

[ross]

Originally Posted by ross

An example could be the latest Batman Group demo: if you tried to do an automatic centering it would be a real disaster, just observe what happens in the DMA debugger

I just happened upon a youtube video by chance where you can see the (incorrect) effects of autocentering on that demo!

There are signs even in the previous minutes but skip to 6:30 to see what I mean

[ Show youtube player ]

[TCD]

Yeah, that 'jumping' really ruins the effect. I used to set up 'viewports' for FS-UAE ages ago, but there are always those games or demos that just never fit properly all the time.

[Supamax]

Hi,
no, I can't believe it's normal having such a shift (horizontal and vertical) by default.
I mean: I didn't use WinUAE for some years, for personal reasons, and the last version I used (and the previous ones) didn't have that "issue".
Now I find all the games extremely shifted, with default config. How is that possible?

Originally Posted by Snoopy1234

Have a look at the actual display resolution vs expected resolution. I guess we all think the monitor processes the numbers and translates it to suit. It doesn't work that way because the video output of machines and the monitor resolution have never been standardized. They're actually different systems. The numbers need to match or be evenly divisible across the machine and display.

No, no... I use the same display mode I used years ago (and windowed, not fullscreen, so the Windows monitor resolution can't affect it): windowed 720 x 568.

EDIT: I would like to test all the previous versions of WinUAE (till I find one with "right" centering), from v4.9.0 backwards. Are there additional intermediate versions other than these ones?
https://www.winuae.net/download-old-versions/