Bug 368389

Summary:	No window decoration on windows created with SDL2
Product:	[Plasma] kwin	Reporter:	CapsAdmin <eliashogstvedt>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	hein, icculus
Priority:	NOR
Version:	git master
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed In:

Description CapsAdmin 2016-09-07 12:17:43 UTC

This has been reported to the the SDL bugtracker as well but there's talk about how this is not SDL's problem. 

The bug report is here: bugzilla.libsdl.org/show_bug.cgi?id=2710

Reproducible: Always

Comment 1 Eike Hein 2016-09-07 12:22:03 UTC

I built the hello_world.c attached over there and ran it with SDL_VIDEODRIVER=wayland on kwin master and can confirm no decos (I don't know why). It does get a deco when SDL uses Xwayland.

Comment 2 Martin Flöser 2016-09-07 20:22:18 UTC

Wayland uses client-side decorations by default. Of course there are no decorations, that's the (stupid) idea of client-side decorations. KWin has an additional interface to negotiate window decorations, so that KWin can add window decorations.

So SDL could implement this so that it can get decorations, the protocol is described at: https://quickgit.kde.org/?p=kwayland.git&a=blob&h=8bc106c7c42a40f71dad9a884824a7a9899e7b2f&hb=29d6bbd92a20ced2c1a3301f5df9e605999cf894&f=src%2Fclient%2Fprotocols%2Fserver-decoration.xml

And KWayland also has an implementation for it.

If SDL does not like the (stupid) default behavior of client-side-decoration I highly recommend them to "complain" on the Wayland developer mailing list. They will have mine and Qt developer's fully support.

Comment 3 Ryan C. Gordon 2018-11-04 22:07:52 UTC

Just a quick follow up in case someone finds this bug via Google: SDL supports both the KDE-specific SSD protocol for legacy systems and xdg-decoration for future machines. This will be in SDL 2.0.10 and later.

--ryan.

Comment 4 Eike Hein 2018-11-05 16:38:09 UTC

Ryan,

just fyi, over in the KWin/Plasma team we've seen your video and activity in the Gnome GitLab issue and were really happy and appreciative to see that got going. Thanks!