[PATCH v4 3/6] winewayland.drv: Handle wl_output objects only in the desktop process.

[Alexandros Frantzis]

From: Alexandros Frantzis

Since non-desktop processes rely on the win32u internal current settings
handling to get display information, they don't need to access wl_output
objects themselves for now.

Signed-off-by: Alexandros Frantzis 
---
 dlls/winewayland.drv/display.c         | 15 ++++-----------
 dlls/winewayland.drv/wayland.c         |  3 +++
 dlls/winewayland.drv/waylanddrv.h      |  6 ++++++
 dlls/winewayland.drv/waylanddrv_main.c | 25 +++++++++++++++++++++++++
 4 files changed, 38 insertions(+), 11 deletions(-)

diff --git a/dlls/winewayland.drv/display.c b/dlls/winewayland.drv/display.c
index cd009c54a7a..adf981d92e6 100644
--- a/dlls/winewayland.drv/display.c
+++ b/dlls/winewayland.drv/display.c
@@ -44,16 +44,7 @@ static void wayland_refresh_display_devices(void)

void wayland_init_display_devices(void)
 {
-    struct ntuser_thread_info *thread_info = NtUserGetThreadInfo();
-    DWORD current_pid = GetCurrentProcessId();
-    HWND desktop_hwnd = UlongToHandle(thread_info->top_window);
-    DWORD desktop_pid = 0;
-
-    if (desktop_hwnd) NtUserGetWindowThread(desktop_hwnd, &desktop_pid);
-
-    /* Refresh devices only from the desktop window process. */
-    if (!desktop_pid || current_pid == desktop_pid)
-        wayland_refresh_display_devices();
+    wayland_refresh_display_devices();
 }

static void wayland_add_device_gpu(const struct gdi_device_manager *device_manager,
@@ -146,7 +137,9 @@ BOOL WAYLAND_UpdateDisplayDevices(const struct gdi_device_manager *device_manage
     struct wayland_output *output;
     INT output_id = 0;

-    if (!force && !force_display_devices_refresh) return TRUE;
+    /* For now, update the display devices only when a compositor side update
+     * is received in the desktop window process. */
+    if (!force_display_devices_refresh) return TRUE;

TRACE("force=%d force_refresh=%d\n", force, force_display_devices_refresh);

diff --git a/dlls/winewayland.drv/wayland.c b/dlls/winewayland.drv/wayland.c
index 104a091ea80..2f728355438 100644
--- a/dlls/winewayland.drv/wayland.c
+++ b/dlls/winewayland.drv/wayland.c
@@ -45,6 +45,9 @@ static void registry_handle_global(void *data, struct wl_registry *registry,
 {
     TRACE("interface=%s version=%u id=%u\n", interface, version, id);

+    /* For now only the desktop process needs wl_output objects. */
+    if (GetCurrentProcessId() != get_desktop_process_id()) return;
+
     if (strcmp(interface, "wl_output") == 0)
     {
         if (!wayland_output_create(id, version))
diff --git a/dlls/winewayland.drv/waylanddrv.h b/dlls/winewayland.drv/waylanddrv.h
index 941b4672d0d..77797c005c2 100644
--- a/dlls/winewayland.drv/waylanddrv.h
+++ b/dlls/winewayland.drv/waylanddrv.h
@@ -84,6 +84,12 @@ void wayland_init_display_devices(void) DECLSPEC_HIDDEN;
 BOOL wayland_output_create(uint32_t id, uint32_t version) DECLSPEC_HIDDEN;
 void wayland_output_destroy(struct wayland_output *output) DECLSPEC_HIDDEN;

+/**********************************************************************
+ *          USER32 helpers
+ */
+
+DWORD get_desktop_process_id(void) DECLSPEC_HIDDEN;
+
 /**********************************************************************
  *          USER driver functions
  */
diff --git a/dlls/winewayland.drv/waylanddrv_main.c b/dlls/winewayland.drv/waylanddrv_main.c
index 35e7ecd3a6d..ec7efef9366 100644
--- a/dlls/winewayland.drv/waylanddrv_main.c
+++ b/dlls/winewayland.drv/waylanddrv_main.c
@@ -27,8 +27,33 @@
 #include "ntstatus.h"
 #define WIN32_NO_STATUS

+#include "wine/server.h"
+
 #include "waylanddrv.h"

+DWORD get_desktop_process_id(void)
+{
+    struct ntuser_thread_info *thread_info = NtUserGetThreadInfo();
+    HWND desktop_hwnd = UlongToHandle(thread_info->top_window);
+    DWORD desktop_pid;
+
+    /* The thread information may not have been updated yet, so also query
+     * the server directly to be certain. */
+    if (!desktop_hwnd)
+    {
+        SERVER_START_REQ(get_desktop_window)
+        {
+            req->force = 0;
+            if (!wine_server_call(req))
+                desktop_hwnd = UlongToHandle(reply->top_window);
+        }
+        SERVER_END_REQ;
+    }
+
+    return NtUserGetWindowThread(desktop_hwnd, &desktop_pid) ?
+           desktop_pid : GetCurrentProcessId();
+}
+
 static const struct user_driver_funcs waylanddrv_funcs =
 {
     .pGetCurrentDisplaySettings = WAYLAND_GetCurrentDisplaySettings,