wayland: Maximize/Restore should set the relevant window flags. Also, Maximize should be ignored for fixed-size windows.
diff --git a/src/video/wayland/SDL_waylandwindow.c b/src/video/wayland/SDL_waylandwindow.c
index a6ff2fb..5450230 100644
--- a/src/video/wayland/SDL_waylandwindow.c
+++ b/src/video/wayland/SDL_waylandwindow.c
@@ -850,6 +850,11 @@ Wayland_RestoreWindow(_THIS, SDL_Window * window)
SDL_WindowData *wind = window->driverdata;
const SDL_VideoData *viddata = (const SDL_VideoData *) _this->driverdata;
+ /* Set this flag now even if we never actually maximized, eventually
+ * ShowWindow will take care of it along with the other window state.
+ */
+ window->flags &= ~SDL_WINDOW_MAXIMIZED;
+
/* Note that xdg-shell does NOT provide a way to unset minimize! */
if (viddata->shell.xdg) {
if (wind->shell_surface.xdg.roleobj.toplevel == NULL) {
@@ -894,6 +899,15 @@ Wayland_MaximizeWindow(_THIS, SDL_Window * window)
SDL_WindowData *wind = window->driverdata;
SDL_VideoData *viddata = (SDL_VideoData *) _this->driverdata;
+ if (!(window->flags & SDL_WINDOW_RESIZABLE)) {
+ return;
+ }
+
+ /* Set this flag now even if we don't actually maximize yet, eventually
+ * ShowWindow will take care of it along with the other window state.
+ */
+ window->flags |= SDL_WINDOW_MAXIMIZED;
+
if (viddata->shell.xdg) {
if (wind->shell_surface.xdg.roleobj.toplevel == NULL) {
return; /* Can't do anything yet, wait for ShowWindow */