WayVR: Fix process launching calling create_display two times

src/backend/wayvr/display.rs

@@ -31,6 +31,7 @@ fn generate_auth_key() -> String {
     uuid.to_string()
 }
 
+#[derive(Debug)]
 pub struct DisplayWindow {
     pub window_handle: window::WindowHandle,
     pub toplevel: ToplevelSurface,
@@ -42,12 +43,14 @@ pub struct SpawnProcessResult {
     pub child: std::process::Child,
 }
 
+#[derive(Debug)]
 pub enum DisplayTask {
     ProcessCleanup(process::ProcessHandle),
 }
 
 const MAX_DISPLAY_SIZE: u16 = 8192;
 
+#[derive(Debug)]
 pub struct Display {
     // Display info stuff
     pub width: u16,

src/backend/wayvr/egl_data.rs

@@ -1,6 +1,7 @@
 use super::egl_ex;
 use anyhow::anyhow;
 
+#[derive(Debug)]
 pub struct EGLData {
     pub egl: khronos_egl::Instance<khronos_egl::Static>,
     pub display: khronos_egl::Display,
@@ -15,13 +16,13 @@ macro_rules! bind_egl_function {
     };
 }
 
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub struct DMAbufModifierInfo {
     pub modifiers: Vec<u64>,
     pub fourcc: u32,
 }
 
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub struct DMAbufData {
     pub fd: i32,
     pub stride: i32,

src/backend/wayvr/event_queue.rs

@@ -2,11 +2,12 @@
 
 use std::{cell::RefCell, collections::VecDeque, rc::Rc};
 
+#[derive(Debug)]
 struct Data<DataType> {
     queue: VecDeque<DataType>,
 }
 
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub struct SyncEventQueue<DataType> {
     data: Rc<RefCell<Data<DataType>>>,
 }

src/backend/wayvr/handle.rs

@@ -6,12 +6,14 @@ macro_rules! gen_id {
 		$cell_name:ident,
 		$handle_name:ident) => {
         //ThingCell
+        #[derive(Debug)]
         pub struct $cell_name {
             pub obj: $instance_name,
             pub generation: u64,
         }
 
         //ThingVec
+        #[derive(Debug)]
         pub struct $container_name {
             // Vec<Option<ThingCell>>
             pub vec: Vec<Option<$cell_name>>,
@@ -20,7 +22,7 @@ macro_rules! gen_id {
         }
 
         //ThingHandle
-        #[derive(Default, Clone, Copy, PartialEq, Hash, Eq)]
+        #[derive(Default, Debug, Clone, Copy, PartialEq, Hash, Eq)]
         pub struct $handle_name {
             idx: u32,
             generation: u64,

src/backend/wayvr/mod.rs

@@ -35,7 +35,7 @@ use wayvr_ipc::packet_client;
 const STR_INVALID_HANDLE_DISP: &str = "Invalid display handle";
 const STR_INVALID_HANDLE_PROCESS: &str = "Invalid process handle";
 
-#[derive(Clone)]
+#[derive(Debug, Clone)]
 pub struct WaylandEnv {
     pub display_num: u32,
 }
@@ -106,7 +106,10 @@ pub enum MouseIndex {
 
 pub enum TickTask {
     NewExternalProcess(ExternalProcessRequest), // Call WayVRCompositor::add_client after receiving this message
-    NewDisplay(packet_client::WvrDisplayCreateParams),
+    NewDisplay(
+        packet_client::WvrDisplayCreateParams,
+        Option<display::DisplayHandle>, /* existing handle? */
+    ),
 }
 
 impl WayVR {

src/backend/wayvr/process.rs

@@ -4,6 +4,7 @@ use crate::gen_id;
 
 use super::display;
 
+#[derive(Debug)]
 pub struct WayVRProcess {
     pub auth_key: String,
     pub child: std::process::Child,
@@ -14,11 +15,13 @@ pub struct WayVRProcess {
     pub env: Vec<(String, String)>,
 }
 
+#[derive(Debug)]
 pub struct ExternalProcess {
     pub pid: u32,
     pub display_handle: display::DisplayHandle,
 }
 
+#[derive(Debug)]
 pub enum Process {
     Managed(WayVRProcess),     // Process spawned by WayVR
     External(ExternalProcess), // External process not directly controlled by us

src/backend/wayvr/server_ipc.rs

@@ -158,9 +158,10 @@ impl Connection {
             false,
         )?;
 
-        params
-            .tasks
-            .push(TickTask::NewDisplay(packet_params.clone()));
+        params.tasks.push(TickTask::NewDisplay(
+            packet_params.clone(),
+            Some(display_handle),
+        ));
 
         send_packet(
             &mut self.conn,

src/backend/wayvr/window.rs

@@ -2,6 +2,7 @@ use smithay::wayland::shell::xdg::ToplevelSurface;
 
 use crate::gen_id;
 
+#[derive(Debug)]
 pub struct Window {
     pub pos_x: i32,
     pub pos_y: i32,
@@ -38,6 +39,7 @@ impl Window {
     }
 }
 
+#[derive(Debug)]
 pub struct WindowManager {
     pub windows: WindowVec,
 }

src/overlays/wayvr.rs

@@ -440,19 +440,22 @@ where
                         });
                 }
             }
-            wayvr::TickTask::NewDisplay(cpar) => {
+            wayvr::TickTask::NewDisplay(cpar, disp_handle) => {
                 log::info!("Creating new display with name \"{}\"", cpar.name);
 
                 let mut wayvr = r_wayvr.borrow_mut();
 
                 let unique_name = wayvr.get_unique_display_name(cpar.name);
 
-                let disp_handle = wayvr.data.state.create_display(
-                    cpar.width,
-                    cpar.height,
-                    &unique_name,
-                    false,
-                )?;
+                let disp_handle = match disp_handle {
+                    Some(d) => d,
+                    None => wayvr.data.state.create_display(
+                        cpar.width,
+                        cpar.height,
+                        &unique_name,
+                        false,
+                    )?,
+                };
 
                 wayvr.overlays_to_create.push(OverlayToCreate {
                     disp_handle,