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Apply shader selectively using picom #33
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I found a way thanks to It seems that the X windows consistently have this property So to match all emacs frames: |
You should match Emacs on the Other windows are basically just windows without that |
That would work but I also run other emacs processes, so they will also get
matched. I just want the emacs running exwm to get matched.
…On Thu, Apr 4, 2024, 15:23 Steven Allen ***@***.***> wrote:
You should match Emacs on the WM_CLASS ("emacs", "Emacs"), but the shader
will apply to the entire frame, not individual windows.
Other windows are basically just windows without that WM_CLASS, although
you likely want to restrict your matches to WM_STATE "normal".
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You can probably give your EXWM windows a custom frame title. |
Hi,
picom allows one to apply a shader to a specific window using a matching pattern, including name, window type, window state, etc. I am having a hard time finding how to match things properly in EXWM and I probably need a lower level understanding of how EXWM works. Maybe you can help me ?
It seems like what appears as a window is made of different layers. First the proper X window, then appearing under it, an emacs frame. It looks like the X window is associated to a buffer of that frame. Now I more or less see how I can manipulate these things in emacs, though I am not sure how I can access them from picom.
How can I match the emacs frame that is behind a window ? How can I match all the X windows without matching the underneath emacs frame ? Is there some attribute that distinguishes them, like
_NET_WM_WINDOW_TYPE
, or is one the child of the other, or any other way I could distinguish them ?For example if I do
picom --backend glx --window-shader-fg-rule invisible.glsl:'_NET_WM_WINDOW_TYPE@:a *= "NORMAL"'
I can match all the X windows and the emacs frames, which seems to boil down to everything apart from polybar in my setting.Cheers,
Théo
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