Xpresent transparent window title bar

[Guy Rouillier]

New member of this mailing list.

I've been using Windows 7 side by side with Linux (mostly Ubuntu MATE).  
I'd like to use a couple of the features from the Aero interface from 
Windows 7 on MATE  I've been discussing this topic on the Ubuntu MATE 
community forum here:

https://ubuntu-mate.community/t/marco-xpresent-compositor-transparent-title-bars/26968/4

In brief, I'm trying to get semi-transparent task bar (accomplished), 
inactive window background (accomplished) and window titlebars (not yet 
accomplished with Xpresent.)  All of these features are achievable with 
Compiz, but that consumes quite a bit of the CPU, so I'm seeing if I can 
accomplish this with something less resource-intensive, like Xpresent or 
Xrender.  As noted, with Xpresent, I haven't been able to achieve the 
semi-transparent titlebars.

Is there any known way to get semi-transparent titlebars with Xpresent?  
I'm looking at the /usr/share/themes/YaruOk/gtk-3.0/gtk.css file and 
trying to figure out how I might modify the titlebar rendering in that 
theme, but the code is difficult to decipher by someone not familiar 
with it.

Thanks.  If this is not easily achievable, I'll switch my focus to 
Xrender.

--
Guy Rouillier