feat: render configurable window shadows

compositor/src/state.rs

@@ -94,6 +94,7 @@ pub struct Ferese {
     pub window_ids: HashMap<Window, WindowId>,
     pub window_geometry: HashMap<WindowId, WindowGeometry>,
     pub(crate) window_borders: HashMap<WindowId, crate::winit::WindowBorderBuffers>,
+    pub(crate) window_shadows: HashMap<WindowId, crate::winit::WindowShadowBuffers>,
     pub(crate) rounded_clip_programs: HashMap<ErasedContextId, crate::winit::RoundedClipPrograms>,
     viewport_animations: HashMap<WorkspaceId, AnimatedValue>,
     scrolling_world_x: HashMap<WindowId, (WorkspaceId, AnimatedValue)>,
@@ -398,6 +399,7 @@ impl Ferese {
             window_ids: HashMap::new(),
             window_geometry: HashMap::new(),
             window_borders: HashMap::new(),
+            window_shadows: HashMap::new(),
             rounded_clip_programs: HashMap::new(),
             viewport_animations: HashMap::new(),
             scrolling_world_x: HashMap::new(),
@@ -784,6 +786,7 @@ impl Ferese {
         self.space.unmap_elem(window);
         self.window_geometry.remove(&id);
         self.window_borders.remove(&id);
+        self.window_shadows.remove(&id);
         self.window_rules_applied.remove(&id);
         self.scrolling_world_x.remove(&id);
         if let Err(error) = self.workspaces.remove_window(id) {