metal: implement direct scanout

src/tree/output.rs

@@ -80,7 +80,7 @@ pub async fn output_render_data(state: Rc<State>) {
 impl OutputNode {
     pub fn perform_screencopies(
         &self,
-        fb: &dyn GfxFramebuffer,
+        fb: Option<&dyn GfxFramebuffer>,
         tex: &Rc<dyn GfxTexture>,
         render_hardware_cursor: bool,
     ) {

src/tree/toplevel.rs

@@ -5,6 +5,7 @@ use {
             ext_foreign_toplevel_handle_v1::ExtForeignToplevelHandleV1,
             ext_foreign_toplevel_list_v1::ExtForeignToplevelListV1,
             wl_seat::{collect_kb_foci, collect_kb_foci2, NodeSeatState, SeatId},
+            wl_surface::WlSurface,
         },
         rect::Rect,
         state::State,
@@ -161,6 +162,10 @@ pub trait ToplevelNode: Node {
     fn tl_last_active_child(self: Rc<Self>) -> Rc<dyn ToplevelNode> {
         self.tl_into_dyn()
     }
+
+    fn tl_scanout_surface(&self) -> Option<Rc<WlSurface>> {
+        None
+    }
 }
 
 pub struct FullscreenedData {
@@ -356,8 +361,8 @@ impl ToplevelData {
         });
         drop(data);
         self.is_fullscreen.set(true);
-        ws.set_fullscreen_node(&node);
         node.tl_set_parent(ws.clone());
+        ws.set_fullscreen_node(&node);
         node.clone().tl_set_workspace(ws);
         node.clone()
             .tl_change_extents(&ws.output.get().global.pos.get());

src/tree/workspace.rs

@@ -143,6 +143,11 @@ impl WorkspaceNode {
         if plane_was_visible {
             self.plane_set_visible(false);
         }
+        if let Some(surface) = node.tl_scanout_surface() {
+            if let Some(fb) = self.output.get().global.connector.connector.drm_feedback() {
+                surface.send_feedback(&fb);
+            }
+        }
     }
 
     pub fn remove_fullscreen_node(&self) {
@@ -151,6 +156,11 @@ impl WorkspaceNode {
             if self.visible.get() {
                 self.plane_set_visible(true);
             }
+            if let Some(surface) = node.tl_scanout_surface() {
+                if let Some(fb) = surface.client.state.drm_feedback.get() {
+                    surface.send_feedback(&fb);
+                }
+            }
         }
     }