[PATCH v2 0/1] MR9204: winewayland: Pass through mouse events for transparent, layered windows.

[Alexandros Frantzis (＠afrantzis)]

Set an empty Wayland input region for windows that as marked as
WS_EX_TRANSPARENT | WS_EX_LAYERED in order to match the Windows
behavior.

Setting an empty input region prevents the compositor from giving the
pointer focus to the corresponding surface in the first place, and
improves consistency between the Win32 mouse and Wayland pointer focus
states.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58650

--
  v2: winewayland: Pass through mouse events for transparent, layered windows.

https://gitlab.winehq.org/wine/wine/-/merge_requests/9204

[PATCH v2 1/1] winewayland: Pass through mouse events for transparent, layered windows.

[Alexandros Frantzis]

From: Alexandros Frantzis

Set an empty Wayland input region for windows that as marked as
WS_EX_TRANSPARENT and WS_EX_LAYERED in order to match the Windows
behavior.

Setting an empty input region prevents the compositor from giving the
pointer focus to the corresponding surface in the first place, and
improves consistency between the Win32 mouse and Wayland pointer focus
states.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58650
---
 dlls/winewayland.drv/window.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/dlls/winewayland.drv/window.c b/dlls/winewayland.drv/window.c
index 3b94112dc6d..7816f832900 100644
--- a/dlls/winewayland.drv/window.c
+++ b/dlls/winewayland.drv/window.c
@@ -193,12 +193,13 @@ static BOOL wayland_win_data_create_wayland_surface(struct wayland_win_data *dat
     struct wayland_surface *surface;
     enum wayland_surface_role role;
     BOOL visible;
+    DWORD exstyle = NtUserGetWindowLongW(data->hwnd, GWL_EXSTYLE);
+    struct wl_region *input_region;

TRACE("hwnd=%p\n", data->hwnd);

visible = ((NtUserGetWindowLongW(data->hwnd, GWL_STYLE) & WS_VISIBLE) == WS_VISIBLE) &&
-               (!(NtUserGetWindowLongW(data->hwnd, GWL_EXSTYLE) & WS_EX_LAYERED) ||
-                data->layered_attribs_set);
+               (!(exstyle & WS_EX_LAYERED) || data->layered_attribs_set);

if (!visible) role = WAYLAND_SURFACE_ROLE_NONE;
     else if (toplevel_surface) role = WAYLAND_SURFACE_ROLE_SUBSURFACE;
@@ -214,6 +215,14 @@ static BOOL wayland_win_data_create_wayland_surface(struct wayland_win_data *dat

if (!(surface = data->wayland_surface) && !(surface = wayland_surface_create(data->hwnd))) return FALSE;

+    /* Pass through mouse events for layered, transparent windows, to match
+     * Windows behavior. */
+    input_region = ((exstyle & WS_EX_TRANSPARENT) && (exstyle & WS_EX_LAYERED)) ?
+                   wl_compositor_create_region(process_wayland.wl_compositor) :
+                   NULL;
+    wl_surface_set_input_region(surface->wl_surface, input_region);
+    if (input_region) wl_region_destroy(input_region);
+
     /* If the window is a visible toplevel make it a wayland
      * xdg_toplevel. Otherwise keep it role-less to avoid polluting the
      * compositor with empty xdg_toplevels. */

[Alexandros Frantzis (＠afrantzis)]

On Fri Oct 17 17:33:41 2025 +0000, Rémi Bernon wrote:
> Are you sure that layered windows aren't supposed to receive pointer input?

I messed up the bitwise check... (from my tests a window needs to be both WS_EX_TRANSPARENT and WS_EX_LAYERED for the pass through to kick in). Fixed now, thanks.