Screen Scaling on High DPI problem...

[IPeluchito]

I just discovered that the emulator has a problem with high resolution screen scaling in Windows 8.1 at 3840 x 2160 and 250% scaling ... I leave screenshot comparing how it looks by default (LEFT) and disabling screen scaling on high DPI settings (RIGHT)

[thrust26]

@DirtyHairy @sa666666 Can you verify this? I have no such display.

@IPeluchito If I get you right the scaling is done by the OS (Windows). What do you expect from Stella here? AFAIK Stella cannot prevent Windows from scaling. Or am I missing something?

Also, is the screenshot on the left done by Windows (ALT+Print) or by Stella (F12)?

[DirtyHairy]

Scaling on MacOS is crisp as Stella runs in "retina-native" mode there. I have no idea whether an equivalent exists on windows or how to use it.

[SpiceWare]

At work I added HiDPI support to our applications back in 2012. I don't recall specifics, but I had to add a manifest file as specified here:
https://docs.microsoft.com/en-us/windows/win32/direct2d/how-to--size-a-window-properly-for-high-dpi-displays

Note: that's from 2018 so not where I originally found the info, but the manifest matches

In 2017 I updated the manifest because we ran into an issue with Windows 10 reporting X scaling values differently than the prior versions of Windows. Basically earlier versions of Windows used 133% scaling for X if you had selected 125%. The update adds the ability to detect Windows 10, without the update Windows 10 is detected as Windows 8.

The zip contains the manifest with Windows 10 updates, a screenshot of were to add the manifest, and adjust functions that differentiate between Windows 10 and prior.

DPI.zip

[sa666666]

@SpiceWare, thanks for the info. We plan to release version 6.3 later this week, so it's too late in the release cycle to get to this. But assuming this is the issue, we can address it in 6.3.1.

[thrust26]

@IPeluchito Is this still still an issue with Stella?

Currently SDL does not support High DPI for Windows (unlike MacOS), but there is a workaround. You can define a High DPI override for the executable. Open the properties for Stella.exe, select Compatibility/High DPI scaling override and set to 'Application'.

125% scaling without override:

125% scaling with override:

I seems that you have to do that override only once. And not have to repeat this with each new Stella version.

[thrust26]

No feedback, seems to be fine.