cli: add randr subcommand

src/backends/dummy.rs

@@ -53,10 +53,6 @@ impl Connector for DummyOutput {
         None
     }
 
-    fn set_enabled(&self, _enabled: bool) {
-        // nothing
-    }
-
     fn set_mode(&self, _mode: Mode) {
         // nothing
     }

src/backends/metal/video.rs

@@ -130,6 +130,10 @@ impl BackendDrmDevice for MetalDrmDevice {
     fn set_direct_scanout_enabled(&self, enabled: bool) {
         self.direct_scanout_enabled.set(Some(enabled));
     }
+
+    fn is_render_device(&self) -> bool {
+        Some(self.id) == self.backend.ctx.get().map(|c| c.dev_id)
+    }
 }
 
 pub struct HandleEvents {
@@ -846,6 +850,10 @@ impl Connector for MetalConnector {
         Some(self.dev.id)
     }
 
+    fn enabled(&self) -> bool {
+        self.enabled.get()
+    }
+
     fn set_enabled(&self, enabled: bool) {
         if self.enabled.replace(enabled) != enabled {
             if self.display.borrow_mut().connection == ConnectorStatus::Connected {

src/backends/x.rs

@@ -994,6 +994,10 @@ impl BackendDrmDevice for XDrmDevice {
     fn set_direct_scanout_enabled(&self, enabled: bool) {
         let _ = enabled;
     }
+
+    fn is_render_device(&self) -> bool {
+        true
+    }
 }
 
 struct XOutput {
@@ -1055,10 +1059,6 @@ impl Connector for XOutput {
         Some(self.backend.drm_device_id)
     }
 
-    fn set_enabled(&self, _enabled: bool) {
-        // nothing
-    }
-
     fn set_mode(&self, _mode: Mode) {
         log::warn!("X backend doesn't support changing the connector mode");
     }