From c2c41fb14ce780ec7b97bde1c4e8ccf75942f3ce Mon Sep 17 00:00:00 2001
From: Campbell Barton <campbell@blender.org>
Date: Wed, 16 Nov 2022 11:25:34 +1100
Subject: [PATCH] Fix missing title-bar redrawing with Wayland & libdecor

Regression in [0], changing active/inactive missed redrawing the
title-bar,

[0]: 37b256e26feb454d9febd84dac1b1ce8b8d84d90
---
 intern/ghost/intern/GHOST_WindowWayland.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/intern/ghost/intern/GHOST_WindowWayland.cpp b/intern/ghost/intern/GHOST_WindowWayland.cpp
index 07fbbc12d31..ba7df56a34c 100644
--- a/intern/ghost/intern/GHOST_WindowWayland.cpp
+++ b/intern/ghost/intern/GHOST_WindowWayland.cpp
@@ -355,6 +355,8 @@ static void gwl_window_frame_update_from_pending_lockfree(GWL_Window *win)
 
 #endif
 
+  bool do_redraw = false;
+
   if (win->frame_pending.size[0] != 0 && win->frame_pending.size[1] != 0) {
     if ((win->frame.size[0] != win->frame_pending.size[0]) ||
         (win->frame.size[1] != win->frame_pending.size[1])) {
@@ -362,6 +364,9 @@ static void gwl_window_frame_update_from_pending_lockfree(GWL_Window *win)
     }
   }
 
+  bool is_active_ghost = (win->ghost_window ==
+                          win->ghost_system->getWindowManager()->getActiveWindow());
+
   if (win->frame_pending.is_active) {
     win->ghost_window->activate();
   }
@@ -369,6 +374,10 @@ static void gwl_window_frame_update_from_pending_lockfree(GWL_Window *win)
     win->ghost_window->deactivate();
   }
 
+  if (is_active_ghost != win->frame_pending.is_active) {
+    do_redraw = true;
+  }
+
   win->frame_pending.size[0] = win->frame.size[0];
   win->frame_pending.size[1] = win->frame.size[1];
 
@@ -377,6 +386,15 @@ static void gwl_window_frame_update_from_pending_lockfree(GWL_Window *win)
   /* Signal not to apply the scale unless it's configured. */
   win->frame_pending.size[0] = 0;
   win->frame_pending.size[1] = 0;
+
+  if (do_redraw) {
+#ifdef USE_EVENT_BACKGROUND_THREAD
+    /* Could swap buffers, use pending to a redundant call in some cases. */
+    gwl_window_pending_actions_tag(win, PENDING_SWAP_BUFFERS);
+#else
+    win->ghost_window->swapBuffers();
+#endif
+  }
 }
 
 static void gwl_window_frame_update_from_pending(GWL_Window *win)