Bug 496782

Summary:	Feature request: option to display applications in fullscreen mode without scaling them to fit the screen, leaving black borders around the content
Product:	[Plasma] kwin	Reporter:	Jérémy Bézairie <jeremy.bezairie>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	wishlist	CC:	john.kizer
Priority:	NOR
Version First Reported In:	5.27.11
Target Milestone:	---
Platform:	Debian testing
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Jérémy Bézairie 2024-11-28 11:19:12 UTC

E.g. a video game like Zaz : if its resolution is set to 1280x720 & fullscreen , the game is upscaled to the resolution of my screen : 1920x1080 , but I want the game displayed 1280x720 ( native resolution ) , the image centered at screen with black borders .

On Windows 11 it’s NVIDIA Control Panel , Adjust desktop size and position , Scaling , No scaling but on Debian testing KDE there isn’t such option in NVIDIA X Server Settings , neither Wayland nor X11 .

A solution : gamescope as suggested in https://discuss.kde.org/t/how-to-display-a-video-game-at-its-native-resolution-in-full-screen/26106/4 but :
gamescope is a compositor , so why not KWin instead ?
gamescope isn't available in Debian testing https://packages.debian.org/search?keywords=gamescope , I don't know why ...

I also posted here : https://forums.developer.nvidia.com/t/how-to-display-a-video-game-at-its-native-resolution-in-full-screen/314961 .

Linux/KDE Plasma: 6.11.9-amd64 (64-bit)
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.15