winewayland.drv: Avoid resizing fullscreen windows.

dlls/winewayland.drv/wayland_surface.c

@@ -324,7 +324,7 @@ void wayland_surface_attach_shm(struct wayland_surface *surface,
  * Checks whether a wayland_surface_config object is compatible with the
  * the provided arguments.
  */
-static BOOL wayland_surface_config_is_compatible(struct wayland_surface_config *conf,
+BOOL wayland_surface_config_is_compatible(struct wayland_surface_config *conf,
                                           int width, int height,
                                           enum wayland_surface_config_state state)
 {

dlls/winewayland.drv/waylanddrv.h

@@ -201,6 +201,9 @@ void wayland_surface_attach_shm(struct wayland_surface *surface,
                                 HRGN surface_damage_region) DECLSPEC_HIDDEN;
 struct wayland_surface *wayland_surface_lock_hwnd(HWND hwnd) DECLSPEC_HIDDEN;
 BOOL wayland_surface_reconfigure(struct wayland_surface *surface) DECLSPEC_HIDDEN;
+BOOL wayland_surface_config_is_compatible(struct wayland_surface_config *conf,
+                                          int width, int height,
+                                          enum wayland_surface_config_state state) DECLSPEC_HIDDEN;
 
 /**********************************************************************
  *          Wayland SHM buffer

dlls/winewayland.drv/window.c

@@ -434,6 +434,21 @@ static void wayland_configure_window(HWND hwnd)
         flags |= SWP_FRAMECHANGED;
     }
 
+    /* If the window is already fullscreen and its size is compatible with what
+     * the compositor is requesting, don't force a resize, since some applications
+     * are very insistent on a particular fullscreen size (which may not match
+     * the monitor size). */
+    if ((surface->window.state & WAYLAND_SURFACE_CONFIG_STATE_FULLSCREEN) &&
+        wayland_surface_config_is_compatible(&surface->processing,
+                                             surface->window.rect.right -
+                                                surface->window.rect.left,
+                                             surface->window.rect.bottom -
+                                                surface->window.rect.top,
+                                             surface->window.state))
+    {
+        flags |= SWP_NOSIZE;
+    }
+
     pthread_mutex_unlock(&surface->mutex);
 
     TRACE("processing=%dx%d,%#x\n", width, height, state);