Transformed windows' title bars leave a see-through gap

[Ben Schwartz]

I can see behind the current window through a gap between the titlebar and the menubar in a wobbling window. Screenshot attached.

The behavior occurs regardless of the video card installed on the user's machine

ProblemType: Bug
DistroRelease: Ubuntu 10.04
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
Architecture: i386
Date: Wed May 12 17:53:58 2010
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.2)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash

[Marnanel Thurman (marnanel)]

This certainly isn't a Metacity issue. Sending it over to the Compiz folks.

[jhfhlkjlj (fdsuufijjejejejej-deactivatedaccount)]

Still present on Oneiric.

[Daniel van Vugt (vanvugt)]

As far as I know, the wobbly plugin has always had this bug. I've seen it for many years.

I believe the title bar (decorations) and window content are two separate textures. So if their wobbling coordinates disagree even slightly, or if either is not rendered with correct texture clamping setting, then you will see a gap.

I've never actually looked at the wobbly code though. This is just theory from observing the bug...

[triplesqaurednine (triplesquarednine)]

@Daniel

This bug actually affects nearly all plugins / effects - from animation effects; such as zoom or glide 2, to things like windows in scale and expo too, here is a screenshot of expo;

[url=http://ompldr.org/vZGtiZA][img]http://ompldr.org/tZGtiZA[/img][/url]

I only point this out, because it is a bigger problem than just wobbly windows. In the case of expo, those ugly lines in the decoration change as you move the window ~ and clearly, it looks glitchy / shotty.

I hope at some point you guys get a chance to try to find a proper solution to the bad lines around window decorations, that compiz produces.

cheerz

[MC Return (mc-return)]

Workaround: Using Emerald as window decorator fixes this problem, no see-through gap occurs.

https://launchpad.net/~brainpower/+archive/testing/+build/3505578
Here a direct download link: https://launchpad.net/~brainpower/+archive/testing/+build/3505578/+files/emerald_0.9.5-0~precise2_amd64.deb

^^ This version works on Precise 12.04 with latest Compiz 0.9.7.8 !!!

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 575707, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.