Gabriel Ivăncescu : winex11: Set MWM_FUNC_RESIZE for fullscreen desktop windows.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 75a774f90a86d1e39b2ea4fd5716ec74ac5aae64
URL:    https://gitlab.winehq.org/wine/wine/-/commit/75a774f90a86d1e39b2ea4fd5716ec7...

Author: Gabriel Ivăncescu <gabrielopcode(a)gmail.com>
Date:   Tue Jan  9 19:45:26 2024 +0200

winex11: Set MWM_FUNC_RESIZE for fullscreen desktop windows.

Same workaround as used in is_window_resizable, except it's on a different
code path. This also affects other WMs (e.g. Kwin, compiz).

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56149
Signed-off-by: Gabriel Ivăncescu <gabrielopcode(a)gmail.com>

---

 dlls/winex11.drv/window.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/dlls/winex11.drv/window.c b/dlls/winex11.drv/window.c
index 51125065958..f5f2dd03662 100644
--- a/dlls/winex11.drv/window.c
+++ b/dlls/winex11.drv/window.c
@@ -747,9 +747,13 @@ static void set_mwm_hints( struct x11drv_win_data *data, UINT style, UINT ex_sty
 
     if (data->hwnd == NtUserGetDesktopWindow())
     {
-        if (is_desktop_fullscreen()) mwm_hints.decorations = 0;
-        else mwm_hints.decorations = MWM_DECOR_TITLE | MWM_DECOR_BORDER | MWM_DECOR_MENU | MWM_DECOR_MINIMIZE;
         mwm_hints.functions        = MWM_FUNC_MOVE | MWM_FUNC_MINIMIZE | MWM_FUNC_CLOSE;
+        if (is_desktop_fullscreen())
+        {
+            mwm_hints.decorations = 0;
+            mwm_hints.functions |= MWM_FUNC_RESIZE;  /* some WMs need this to make it fullscreen */
+        }
+        else mwm_hints.decorations = MWM_DECOR_TITLE | MWM_DECOR_BORDER | MWM_DECOR_MENU | MWM_DECOR_MINIMIZE;
     }
     else
     {