xwayland: allow windows to scale themselves

jay-config/src/_private/client.rs

@@ -27,6 +27,7 @@ use {
             connector_type::{ConnectorType, CON_UNKNOWN},
             Connector, DrmDevice, Format, GfxApi, Mode, TearingMode, Transform, VrrMode,
         },
+        xwayland::XScalingMode,
         Axis, Direction, ModifiedKeySym, PciId, Workspace,
     },
     bincode::Options,
@@ -816,6 +817,10 @@ impl Client {
         (width, height)
     }
 
+    pub fn set_x_scaling_mode(&self, mode: XScalingMode) {
+        self.send(&ClientMessage::SetXScalingMode { mode })
+    }
+
     pub fn set_vrr_mode(&self, connector: Option<Connector>, mode: VrrMode) {
         self.send(&ClientMessage::SetVrrMode { connector, mode })
     }

jay-config/src/_private/ipc.rs

@@ -14,6 +14,7 @@ use {
         },
         Axis, Direction, PciId, Workspace,
         _private::{PollableId, WireMode},
+        xwayland::XScalingMode,
     },
     serde::{Deserialize, Serialize},
     std::time::Duration,
@@ -523,6 +524,9 @@ pub enum ClientMessage<'a> {
     SetUiDragThreshold {
         threshold: i32,
     },
+    SetXScalingMode {
+        mode: XScalingMode,
+    },
 }
 
 #[derive(Serialize, Deserialize, Debug)]