From 4b07ab391ac77e2996e61646a258064bb1cadfeb Mon Sep 17 00:00:00 2001
From: ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
Date: Wed, 19 Mar 2025 14:09:57 +0100
Subject: Fix "FLTK apps broken under LabWC compositor" (#1231)

---
 src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx b/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
index f73639598..cdeeab9ac 100644
--- a/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
+++ b/src/drivers/Wayland/Fl_Wayland_Screen_Driver.cxx
@@ -1566,6 +1566,10 @@ static const struct xdg_surface_listener xdg_surface_listener = {
 static bool compute_full_and_maximized_areas(Fl_Wayland_Screen_Driver::output *output,
                                              int& Wfullscreen, int& Hfullscreen,
                                              int& Wworkarea, int& Hworkarea) {
+  if (Fl_Wayland_Screen_Driver::compositor == Fl_Wayland_Screen_Driver::unspecified) {
+    Wfullscreen = 0;
+    return false;
+  }
   bool found_workarea = false;
   Fl_Wayland_Screen_Driver *scr_driver = (Fl_Wayland_Screen_Driver*)Fl::screen_driver();
   struct wl_surface *wl_surface = wl_compositor_create_surface(scr_driver->wl_compositor);
-- 
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