Odd scaling in hybrid mode

[lyra-scarlet]

What version of melonDS DS are you using?

1.1.1

Does the problem happen in standalone melonDS?

No, it's a bug specific to melonDS DS.

What happened?

In hybrid mode, the main screen does not appear to be scaled correctly. This does not seem to apply to the secondary screen, or in other layouts such as left/right. The problem may be hardware specific - it occurs on Raspberry Pi 5 but I am unable to replicate it on other devices.

What should've happened instead?

Screenshot of expected scaling, from melonDS core on same device

Which platforms do you see the problem on?

• [ ] Windows
• [ ] macOS
• [X] Linux
• [ ] Android
• [ ] iOS
• [ ] tvOS
• [ ] Other (specify below)

Which versions of the OS?

Ubuntu 24.04 LTS (GNU/Linux 6.8.0-1004-raspi aarch64)

Which libretro frontend are you using?

RetroArch 1.18.0

Terms

• [X] I agree to follow the code of conduct.
• [X] I understand that melonDS DS is not developed or maintained by the authors of melonDS.
• [X] I understand that this form is for reporting bugs, not for requesting help.
• [X] I understand that the author develops this core in his spare time, and that he is under no obligation to respond to this bug report.

[JesseTG]

I suspect this might be related to how I expose scaling options in the core; the only option is exposed through the OpenGL renderer, but I use that value for software rendering as well.