SDL: wayland: Don't roundtrip in ShowWindow unless restoring a hidden window

SDL Commits
1 
From 74bdb2115db1feda4a24b572e80412d6c6a15f9d Mon Sep 17 00:00:00 2001
From: Frank Praznik <[EMAIL REDACTED]>
Date: Fri, 12 Aug 2022 22:01:12 -0400
Subject: [PATCH] wayland: Don't roundtrip in ShowWindow unless restoring a
 hidden window

Don't call the roundtrip in ShowWindow unless restoring a previously hidden window.  This fixes a regression in GNOME when creating a window with the fullscreen flag set, as the fullscreen window will be positioned down the screen by the height of the top bar if the window is made fullscreen on the primary display and the roundtrip is called when initially displaying the window.
---
 src/video/wayland/SDL_waylandwindow.c | 6 +++++-
 src/video/wayland/SDL_waylandwindow.h | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/video/wayland/SDL_waylandwindow.c b/src/video/wayland/SDL_waylandwindow.c
index f39036c8e08..c63bb1b94a1 100644
--- a/src/video/wayland/SDL_waylandwindow.c
+++ b/src/video/wayland/SDL_waylandwindow.c
@@ -1370,7 +1370,10 @@ void Wayland_ShowWindow(_THIS, SDL_Window *window)
      * Roundtrip required to avoid a possible protocol violation when
      * HideWindow was called immediately before ShowWindow.
      */
-    WAYLAND_wl_display_roundtrip(c->display);
+    if (data->needs_roundtrip) {
+        data->needs_roundtrip = SDL_FALSE;
+        WAYLAND_wl_display_roundtrip(c->display);
+    }
 }
 
 static void
@@ -1447,6 +1450,7 @@ void Wayland_HideWindow(_THIS, SDL_Window *window)
      * Roundtrip required to avoid a possible protocol violation when
      * ShowWindow is called immediately after HideWindow.
      */
+    wind->needs_roundtrip = SDL_TRUE;
     WAYLAND_wl_display_roundtrip(data->display);
 }
 
diff --git a/src/video/wayland/SDL_waylandwindow.h b/src/video/wayland/SDL_waylandwindow.h
index 703ec53da45..d408f14a439 100644
--- a/src/video/wayland/SDL_waylandwindow.h
+++ b/src/video/wayland/SDL_waylandwindow.h
@@ -107,6 +107,7 @@ typedef struct {
     SDL_Rect viewport_rect;
     SDL_bool needs_resize_event;
     SDL_bool floating_resize_pending;
+    SDL_bool needs_roundtrip;
 } SDL_WindowData;
 
 extern void Wayland_ShowWindow(_THIS, SDL_Window *window);