Try these:
fullscreen=true
fullresolution=desktop
aspect=true
scaler=normal2x

By default scalers are only used on low resolutions, add " forced" after the name for use with SVGA resolutions and up.
A better option might be to use a different output mode (opengl or directdraw) that uses gpu scaling.

feda wrote on 2023-02-07, 09:06:

Try these: fullscreen=true fullresolution=desktop aspect=true scaler=normal2x […]
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Try these:
fullscreen=true
fullresolution=desktop
aspect=true
scaler=normal2x

Thanks, but this results in the game going into fullscreen, and I'd like to run it windowed, but at double its original resolution. Also, the scaler is ignored.

jmarsh wrote on 2023-02-07, 14:10:

By default scalers are only used on low resolutions, add " forced" after the name for use with SVGA resolutions and up.
A better option might be to use a different output mode (opengl or directdraw) that uses gpu scaling.

Unfortunately this does not work. I'm already using the ddraw output, and even then the game cannot be run at double it's original resolution. I've tried appending the "forced" param to the scaler, but it does nothing 🙁

LokkenJP wrote on 2023-02-08, 20:29:

Thanks, but this results in the game going into fullscreen, and I'd like to run it windowed

Oh, well why didn't you say so?
Try something like this:
fullscreen=false
windowresolution=1280x960
output=opengl
aspect=true

You should get acquainted with dosbox.conf, there are many options:
https://www.dosbox.com/wiki/Dosbox.conf

output=openglnb if you don't want blended pixels.

feda wrote on 2023-02-09, 01:29:

Oh, well why didn't you say so? Try something like this: fullscreen=false windowresolution=1280x960 output=opengl aspect=true […]
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LokkenJP wrote on 2023-02-08, 20:29:

Thanks, but this results in the game going into fullscreen, and I'd like to run it windowed

Oh, well why didn't you say so?
Try something like this:
fullscreen=false
windowresolution=1280x960
output=opengl
aspect=true

You should get acquainted with dosbox.conf, there are many options:
https://www.dosbox.com/wiki/Dosbox.conf

Thanks, I've already checked the conf file.

Those commands do indeed force the output window to a given resolution, but rely on the opengl output device to do the scaling, ignoring the embedded scalers present in dosbox which in some cases do a much better job, hence my original question, (If there is a way to use Dosbox scalers, in particular the 2xsai one which in my opinion gives really nice results, to work on SVGA games).

Try overlay or ddraw.

feda wrote on 2023-02-09, 17:08:

Try overlay or ddraw.

Using overlay or ddraw, (like using openglnb too), just make the window scale to the forced size by doubling pixel sizes directly, but without applying any scaler algorithm, which results in a blocky rendering.

Show exactly how you're adding " forced" to the scaler name?