blocking mouse when paired with picom

[Sam Lenz]

When using picom and cairo dock in awesomewm, there is a large area towards the bottom of the screen that cannot be interacted with. Killing either application will allow this area to be clicked on again.
Cairo-Dock version: 3.5.0
Using Awesomewm and Picom
AMDGPU with RX 6600
Reproducable by running picom and cairo in awesome, with docks set to appear above windows.
Debug.txt attached to this report :)

[Daniel Kondor (kondor-dani)]

Hi,

thank you for reporting! I can reproduce this, but I'm not sure if it is a problem on our side. It seems that awesomewm might not support setting input shapes (although I cannot confirm for sure), see e.g. here: https://github.com/awesomeWM/awesome/issues/2736

I tested on Openbox, and there the combination of picom + cairo-dock seems to work properly. So maybe it is worth raising with awesomewm devs if this should be supported.

[Daniel Kondor (kondor-dani)]

This is a simple test program for input shapes. Run as:
`python3 gtk_transparent_window.py`
it should draw a "window" that is a grey rectangle, surrounded by a 100 px transparent border on all sides. Input from the transparent area should go to the window below.

[Daniel Kondor (kondor-dani)]

Also likely related:
https://github.com/yshui/picom/issues/904
https://github.com/yshui/picom/issues/1133