I can now confirm that building and installing the https://code.launchpad.net/~albertsmuktupavels/compiz/add-gtk-frame- extents-to-net-supported
compiz branch solves the problem, as far as I can tell solving it entirely. At the moment I am running Debian Unstable, using the Ubuntu PPA kernel and Mesa on Radeon graphics, this version of compiz, and mate compiled with gtk3.16 hacked for semi-transparent panel menus. Transparency in the panel menus works perfectly, and CSD apps render and can be resized just as if they were running in gnome-shell. Looks like this simple change to src/screen.cpp did it, now there is another issue that comes from Metacity. Neither this branch nor the main compiz branch will build the gtk window decorator with Metacity 3.17 installed, so Emerald must be used for window decoration (I don't have the kde development files installed to build the kde window decorator) at least on my current setup. "build metacity" and "build gtk" must both be disabled or the build errors out. Given that Metacity itself no longer supports metacity themes I am not sure that can be fixed unless Compiz is to support using the theme set for csd in the gtk theme. Then the decoration will be much too tall. There is a way get your old window decoration theme back in Emerald. If you have MATE installed you can run marco --replace to screenshot your old metacity theme, then use png files of sections of the decoration to copy your theme in Emerald's "pixmap" engine. Long term options I see are this: 1: Rewrite Metacity support to use current Metacity and read the css theme, not the legacy metacity themes 2: Replace Metacity support with Marco support. Most compiz installs needing gtk-window-decorator are in Unity or MATE. This would introduce Marco as a build dependency of compiz and thus unity. 3: Split out Marco support and Unity support, have Unity include its own window decorator. Code could be exactly the same, but this removes an external dependency from Unity. 4: Dump Metacity support, take over Emerald mantainance instead. Update Emerald theme engines or just create Emerald themes to march distro default themes. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1436553 Title: Transparent windows render black with Gtk3.16 and compiz Status in compiz package in Ubuntu: Confirmed Bug description: Running compiz_1%3a0.9.12.0+15.04.20150202-0ubuntu1 without unity (in mate compiled with gtk-3) and testing Gtk-3.16 I run into serious issues with failures to render certain Gtk Windows transparent. Hardware is AMD FX 8120 with radeon HD 6750 GPU. My theme sets popup windows used by menus transparent, and Gtk application windows with client side decoration (CSD) have transparency underlying the GtkHeaderBar. In the latter case this is what makes rounded corners possible. The transparent popup windows used with my theme to support menus resembling gnome-shell's widgets in my hacked Gtk3 version of mate-panel work fine with Gtk3.14 but due to the window issue get black corners with compiz and Gtk-3.16. Windows drawn transparent with cairo still work, but windows set transparent by GTK usually do not, Changing the window manager to Mutter makes transparency work perfectly. In Gtk-3.14 transparency works in Metacity with compositing enabled, it does not with gtk-3.16. I am not sure whether this should be considered a compiz bug or a Gtk bug, but since transparency works fine in gnome-shell and mutter (as used by shell), I am not sure the GNOME team would consider this a bug they are willing to fix. If nobody fixes this any GNOME application that forces client side decoration (such as the gtk3-demo or gtk3 -widget-factory) will be ugly in Ubuntu unless the client side decorations have square corners. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1436553/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
