Re: [hatari-users] Pixel tripling / quadrupling

[Eero Tamminen <oak@xxxxxxxxxxxxxx>]

Hi,

On 29.1.2025 19.24, Gareth Morris wrote:
> Taking advice from ggn, the following parameters work well for pixel tripling in low res. med res does not come out well though:

Switching between low & med res should not have any impact on Hatari 
window size, and therefore it should not have any impact on what SDL 
does, or what Hatari asks from it.

=> How you're switching to med resolution; using "--tos-res med" option, 
from TOS desktop or with some AUTO-program?

> bForceMax = FALSE
> nMaxWidth = 416
> nMaxHeight = 294

Unless you want to record video in specific size / border sizes, you 
could set these to your monitor's native resolution.

FYI: Emulated display size is dictated by selected machine & monitor 
type combo, and Hatari window size dictated by ZoomFactor setting + 
window resizes done by the user, and constrained by maximum window size 
setting and desktop size.

If ratio between the resulting window size and emulated display 
resolution is integer both in x & y dimensions, Hatari will ask SDL for 
(sharp) nearest-pixel scaling, otherwise for (smoothed) linear scaling. 
I.e. ones that look best in both of these situations.


	- Eero

> nZoomFactor = 3
> bUseSdlRenderer = TRUE
>
>
>
>
> > On 29 Jan 2025, at 14:49, Thomas Huth <th.huth@xxxxxxxxx> wrote:
> >
> > On 29/01/2025 14.03, Nicolas Pomarède wrote:
> > > > Le 29/01/2025 à 13:57, Gareth Morris a écrit :
> > > > Thank you for the reply Nicolas.
> > > >
> > > > Yes I tried with the command line last night, this exact command, and it was definitely using some kind of smoothing and the result was blurry.
> > > >
> > > > I am using MacOS. I asked a two other users about this and they confirmed my findings.
> > > that's strange, under Linux I don't get blurry pixels, even at  high zooming factor.
> > > Maybe there're some SDL 2 options to change this under macOS ?
> >
> > We used to have a switch in the GUI for this, but it has been replaced by some automatic mechanism:
> >
> > https://git.tuxfamily.org/hatari/hatari.git/commit/?id=ca09d9d0d8aa6c783b3f0429effd1552505f9327
> >
> > Sounds like it does not work as expected in this case? Eero, any ideas?
> >
> > Thomas