File winewayland-guess-primary-output.patch of Package wine

Try to guess the primary output on Wayland.
diff --git a/dlls/winewayland.drv/display.c b/dlls/winewayland.drv/display.c
index b2a9428..5a1946b 100644
--- a/dlls/winewayland.drv/display.c
+++ b/dlls/winewayland.drv/display.c
@@ -269,9 +269,11 @@ static void wayland_add_device_modes(const struct gdi_device_manager *device_man
 UINT WAYLAND_UpdateDisplayDevices(const struct gdi_device_manager *device_manager, void *param)
 {
     struct wayland_output *output;
-    DWORD state_flags = DISPLAY_DEVICE_ATTACHED_TO_DESKTOP | DISPLAY_DEVICE_PRIMARY_DEVICE;
+    DWORD state_flags;
     struct wl_array output_info_array;
     struct output_info *output_info;
+    struct output_info *primary_output_info = NULL;
+    char *primary_output_override = getenv("WAYLANDDRV_PRIMARY_MONITOR");
 
     TRACE("\n");
 
@@ -292,12 +294,35 @@ UINT WAYLAND_UpdateDisplayDevices(const struct gdi_device_manager *device_manage
     /* Populate GDI devices. */
     wayland_add_device_gpu(device_manager, param);
 
+    /* Guess the primary output. */
     wl_array_for_each(output_info, &output_info_array)
     {
+        /* If an override is provided, use that. */
+        if (primary_output_override && strcmp(primary_output_override, output_info->output->name) == 0)
+        {
+            primary_output_info = output_info;
+            break;
+        }
+        if (primary_output_info == NULL)
+        {
+            primary_output_info = output_info;
+            continue;
+        }
+        /* Assume the output with the widest resolution is the primary. */
+        if (output_info->output->current_mode->width > primary_output_info->output->current_mode->width ||
+            (output_info->output->current_mode->width == primary_output_info->output->current_mode->width &&
+            output_info->output->current_mode->height > primary_output_info->output->current_mode->height))
+            primary_output_info = output_info;
+    }
+
+    wl_array_for_each(output_info, &output_info_array)
+    {
+        state_flags = DISPLAY_DEVICE_ATTACHED_TO_DESKTOP;
+        if (output_info == primary_output_info)
+            state_flags |= DISPLAY_DEVICE_PRIMARY_DEVICE;
         wayland_add_device_source(device_manager, param, state_flags, output_info);
         wayland_add_device_monitor(device_manager, param, output_info);
         wayland_add_device_modes(device_manager, param, output_info);
-        state_flags &= ~DISPLAY_DEVICE_PRIMARY_DEVICE;
     }
 
     wl_array_release(&output_info_array);