[gimp] Issue #4107: Removing titlebar/borders from Windows Splash Screen

[Jehan <jehanp src gnome org>]

commit 998479706bf043ef83b9b2eca7f7948298af3c9c
Author: Nikc <nikcdc gmail com>
Date:   Fri Jan 21 13:49:18 2022 +0000

    Issue #4107: Removing titlebar/borders from Windows Splash Screen

 app/gui/splash.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/app/gui/splash.c b/app/gui/splash.c
index a9ab59b3d3..8df1d8039a 100644
--- a/app/gui/splash.c
+++ b/app/gui/splash.c
@@ -171,6 +171,12 @@ splash_create (Gimp       *gimp,
                   "resizable",       FALSE,
                   NULL);
 
+  /* Don't remove this call, it's necessary to remove decorations on Windows
+   * (which is the natural state of splash-screens). Looks like the
+   * GDK_WINDOW_TYPE_HINT_SPLASHSCREEN hint is not used on some platforms.
+   */
+  gtk_window_set_decorated (GTK_WINDOW (splash->window), FALSE);
+
   g_signal_connect_swapped (splash->window, "delete-event",
                             G_CALLBACK (exit),
                             GINT_TO_POINTER (0));