feat(servo): isolate profiles with hardware sidecars

crates/ely_servo_host/src/iosurface_handle.rs

@@ -0,0 +1,29 @@
+//! Cross-process IOSurface descriptors used by the macOS hardware path.
+
+/// A send right for importing the current IOSurface in another process.
+///
+/// `surface_id` is the system IOSurface ID. The receiver owns the transferred
+/// Mach send right and must deallocate it after importing the surface.
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[cfg_attr(feature = "servo-engine", derive(serde::Deserialize, serde::Serialize))]
+pub struct IOSurfaceHandle {
+    pub mach_port_name: u32,
+    pub surface_id: u64,
+    pub width: u32,
+    pub height: u32,
+}
+
+/// Stable identity of a presented IOSurface without creating a Mach port.
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub struct IOSurfaceIdentity {
+    pub surface_id: u64,
+    pub width: u32,
+    pub height: u32,
+}
+
+impl IOSurfaceIdentity {
+    #[must_use]
+    pub fn from_handle(handle: IOSurfaceHandle) -> Self {
+        Self { surface_id: handle.surface_id, width: handle.width, height: handle.height }
+    }
+}