Draw my own shadows all over with proper active & inactive configuration

[matinlotfali]

In this pull request, I am removing the native shadows and I am drawing my own shadows instead to fix issue #59

[developer91234]

So does that mean it's possible to force shadows on CSD windows? (Obviously one can force them on KDE by forcing server decoration, then adding an exclusion to remove the titlebar. However this process is labor intensive and depends on the decoration having that toggle)

[developer91234]

Ask because there are no shadows for VSCode when run with CSD, just an outline.
But the effect does force its own system-wide shadows on GTK4 CSD apps.

[matinlotfali]

@developer91234 No I am injecting my own shader into the window. If the window doesn't already have a shadow, I can't draw my own version.

In KWin terms, if expandedGeometry is bigger than frameGeometry, I can draw my shadow. But if they are equal, I can't.

[developer91234]

oh I see.

[developer91234]

Maybe there's some way to force SSD from within the effect, then modify it so that it strips out the titlebar and frame?

[matinlotfali]

@developer91234 that would become part of the KDecoration domain and not the KWinEffects.

[developer91234]

@matinlotfali I guess one way to do it would be to force server decorations on an app, then use the effect to cut out the titlebar area.