Alexandros Frantzis : winewayland.drv: Handle dynamic Wayland output events.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 0031c3b46c89ca81d169213fae38d1a94ccc2506
URL:    https://gitlab.winehq.org/wine/wine/-/commit/0031c3b46c89ca81d169213fae38d1a...

Author: Alexandros Frantzis <alexandros.frantzis(a)collabora.com>
Date:   Mon Apr 24 15:48:00 2023 +0300

winewayland.drv: Handle dynamic Wayland output events.

Handle Wayland output events sent after process initialization,
and update the win32u display devices when handling these
events in the desktop window process.

---

 dlls/winewayland.drv/display.c        | 14 +++++++++++---
 dlls/winewayland.drv/wayland.c        |  4 +++-
 dlls/winewayland.drv/wayland_output.c | 24 ++++++++++++++++++++++++
 dlls/winewayland.drv/waylanddrv.h     |  3 ++-
 4 files changed, 40 insertions(+), 5 deletions(-)

diff --git a/dlls/winewayland.drv/display.c b/dlls/winewayland.drv/display.c
index d822a785898..f734c1714fa 100644
--- a/dlls/winewayland.drv/display.c
+++ b/dlls/winewayland.drv/display.c
@@ -34,9 +34,15 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(waylanddrv);
 
-void wayland_init_display_devices(void)
+static BOOL force_display_devices_refresh;
+
+void wayland_init_display_devices(BOOL force)
 {
     UINT32 num_path, num_mode;
+
+    TRACE("force=%d\n", force);
+
+    if (force) force_display_devices_refresh = TRUE;
     /* Trigger refresh in win32u */
     NtUserGetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, &num_path, &num_mode);
 }
@@ -284,9 +290,11 @@ BOOL WAYLAND_UpdateDisplayDevices(const struct gdi_device_manager *device_manage
     struct wl_array output_info_array;
     struct output_info *output_info;
 
-    if (!force) return TRUE;
+    if (!force && !force_display_devices_refresh) return TRUE;
 
-    TRACE("force=%d\n", force);
+    TRACE("force=%d force_refresh=%d\n", force, force_display_devices_refresh);
+
+    force_display_devices_refresh = FALSE;
 
     wl_array_init(&output_info_array);
 
diff --git a/dlls/winewayland.drv/wayland.c b/dlls/winewayland.drv/wayland.c
index dab23a555a2..38c53e280c5 100644
--- a/dlls/winewayland.drv/wayland.c
+++ b/dlls/winewayland.drv/wayland.c
@@ -135,7 +135,9 @@ BOOL wayland_process_init(void)
     wl_display_roundtrip_queue(process_wayland.wl_display, process_wayland.wl_event_queue);
     wl_display_roundtrip_queue(process_wayland.wl_display, process_wayland.wl_event_queue);
 
-    wayland_init_display_devices();
+    wayland_init_display_devices(FALSE);
+
+    process_wayland.initialized = TRUE;
 
     return TRUE;
 }
diff --git a/dlls/winewayland.drv/wayland_output.c b/dlls/winewayland.drv/wayland_output.c
index 5c93e16f3e1..8293f43b56f 100644
--- a/dlls/winewayland.drv/wayland_output.c
+++ b/dlls/winewayland.drv/wayland_output.c
@@ -97,6 +97,26 @@ static void wayland_output_add_mode(struct wayland_output *output,
     if (current) output->current_mode = mode;
 }
 
+static void maybe_init_display_devices(void)
+{
+    DWORD desktop_pid = 0;
+    HWND desktop_hwnd;
+
+    /* Right after process init we initialize all the display devices, so there
+     * is no need to react to each individual event at that time. This check
+     * also helps us avoid calling NtUserGetDesktopWindow() (see below) at
+     * process init time, since it may not be safe. */
+    if (!process_wayland.initialized) return;
+
+    desktop_hwnd = NtUserGetDesktopWindow();
+    NtUserGetWindowThread(desktop_hwnd, &desktop_pid);
+
+    /* We only update the display devices from the desktop process. */
+    if (GetCurrentProcessId() != desktop_pid) return;
+
+    wayland_init_display_devices(TRUE);
+}
+
 static void wayland_output_done(struct wayland_output *output)
 {
     struct wayland_output_mode *mode;
@@ -111,6 +131,8 @@ static void wayland_output_done(struct wayland_output *output)
               mode->width, mode->height, mode->refresh,
               output->current_mode == mode ? "*" : "");
     }
+
+    maybe_init_display_devices();
 }
 
 static void output_handle_geometry(void *data, struct wl_output *wl_output,
@@ -283,6 +305,8 @@ void wayland_output_destroy(struct wayland_output *output)
     wl_output_destroy(output->wl_output);
     free(output->name);
     free(output);
+
+    maybe_init_display_devices();
 }
 
 /**********************************************************************
diff --git a/dlls/winewayland.drv/waylanddrv.h b/dlls/winewayland.drv/waylanddrv.h
index d5cbb47bf9e..95d115113b3 100644
--- a/dlls/winewayland.drv/waylanddrv.h
+++ b/dlls/winewayland.drv/waylanddrv.h
@@ -47,6 +47,7 @@ extern struct wayland process_wayland DECLSPEC_HIDDEN;
 
 struct wayland
 {
+    BOOL initialized;
     struct wl_display *wl_display;
     struct wl_event_queue *wl_event_queue;
     struct wl_registry *wl_registry;
@@ -80,7 +81,7 @@ struct wayland_output
  */
 
 BOOL wayland_process_init(void) DECLSPEC_HIDDEN;
-void wayland_init_display_devices(void) DECLSPEC_HIDDEN;
+void wayland_init_display_devices(BOOL force) DECLSPEC_HIDDEN;
 
 /**********************************************************************
  *          Wayland output