blur: add probe to check compositor for ext-bg-effect

core/internal/blur/probe.go

@@ -0,0 +1,35 @@
+package blur
+
+import (
+	wlhelpers "github.com/AvengeMedia/DankMaterialShell/core/internal/wayland/client"
+	client "github.com/AvengeMedia/DankMaterialShell/core/pkg/go-wayland/wayland/client"
+)
+
+const extBackgroundEffectInterface = "ext_background_effect_manager_v1"
+
+func ProbeSupport() (bool, error) {
+	display, err := client.Connect("")
+	if err != nil {
+		return false, err
+	}
+	defer display.Context().Close()
+
+	registry, err := display.GetRegistry()
+	if err != nil {
+		return false, err
+	}
+
+	found := false
+	registry.SetGlobalHandler(func(e client.RegistryGlobalEvent) {
+		switch e.Interface {
+		case extBackgroundEffectInterface:
+			found = true
+		}
+	})
+
+	if err := wlhelpers.Roundtrip(display, display.Context()); err != nil {
+		return false, err
+	}
+
+	return found, nil
+}