virtual-output: add support for virtual outputs

jay-config/src/_private/client.rs

@@ -1236,6 +1236,14 @@ impl ConfigClient {
         self.send(&ClientMessage::SetTearingMode { connector, mode })
     }
 
+    pub fn create_virtual_output(&self, name: &str) {
+        self.send(&ClientMessage::CreateVirtualOutput { name })
+    }
+
+    pub fn remove_virtual_output(&self, name: &str) {
+        self.send(&ClientMessage::RemoveVirtualOutput { name })
+    }
+
     pub fn drm_devices(&self) -> Vec<DrmDevice> {
         let res = self.send_with_response(&ClientMessage::GetDrmDevices);
         get_response!(res, vec![], GetDrmDevices { devices });

jay-config/src/_private/ipc.rs

@@ -852,6 +852,12 @@ pub enum ClientMessage<'a> {
     GetConnectorByName {
         name: &'a str,
     },
+    CreateVirtualOutput {
+        name: &'a str,
+    },
+    RemoveVirtualOutput {
+        name: &'a str,
+    },
 }
 
 #[derive(Serialize, Deserialize, Debug)]

jay-config/src/video.rs

@@ -539,6 +539,7 @@ pub mod connector_type {
     pub const CON_SPI: ConnectorType = ConnectorType(19);
     pub const CON_USB: ConnectorType = ConnectorType(20);
     pub const CON_EMBEDDED_WINDOW: ConnectorType = ConnectorType(u32::MAX);
+    pub const CON_VIRTUAL_OUTPUT: ConnectorType = ConnectorType(u32::MAX - 1);
 }
 
 /// A *Direct Rendering Manager* (DRM) device.
@@ -730,6 +731,25 @@ pub fn set_tearing_mode(mode: TearingMode) {
     get!().set_tearing_mode(None, mode)
 }
 
+/// Creates a virtual output with the given name.
+///
+/// This is a no-op if a virtual output with that name already exists.
+///
+/// The created connector can be accessed with [`get_connector_by_name("VO-{name}")`].
+///
+/// A newly created connector is initially disabled. When a connector is destroyed and
+/// later recreated, its previous state is restored.
+pub fn create_virtual_output(name: &str) {
+    get!().create_virtual_output(name);
+}
+
+/// Removes the virtual output with the given name.
+///
+/// This is a no-op if a virtual output with that name does not exist.
+pub fn remove_virtual_output(name: &str) {
+    get!().remove_virtual_output(name);
+}
+
 /// A graphics format.
 #[derive(Serialize, Deserialize, Copy, Clone, Debug, Eq, PartialEq, Hash)]
 pub struct Format(pub u32);