port: add maximize window option to extended menu

port/fast3d/gfx_sdl2.cpp

@@ -36,6 +36,7 @@ static bool vsync_enabled = true;
 static int window_width = DESIRED_SCREEN_WIDTH;
 static int window_height = DESIRED_SCREEN_HEIGHT;
 static bool fullscreen_state;
+static bool maximized_state;
 static bool is_running = true;
 static void (*on_fullscreen_changed_callback)(bool is_now_fullscreen);
 
@@ -76,6 +77,18 @@ static void set_fullscreen(bool on, bool call_callback) {
     }
 }
 
+static void set_maximize_window(bool on) {
+	if (maximized_state == on) {
+		return;
+	}
+	maximized_state = on;
+	if (on) {
+		SDL_MaximizeWindow(wnd);
+	} else {
+		SDL_RestoreWindow (wnd);
+	}
+}
+
 static void gfx_sdl_get_active_window_refresh_rate(uint32_t* refresh_rate) {
     int display_in_use = SDL_GetWindowDisplayIndex(wnd);
 
@@ -110,10 +123,7 @@ static void gfx_sdl_init(const char* game_name, const char* gfx_api_name, bool s
         posY = 100;
     }
 
-    Uint32 flags = SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI | SDL_WINDOW_OPENGL;
-    if (start_maximized) {
-        flags |= SDL_WINDOW_MAXIMIZED;
-    }
+    const Uint32 flags = SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI | SDL_WINDOW_OPENGL;
 
     wnd = SDL_CreateWindow(title, posX, posY, window_width, window_height, flags);
     if (!wnd) {
@@ -185,6 +195,7 @@ static void gfx_sdl_init(const char* game_name, const char* gfx_api_name, bool s
     }
 #endif
 
+    set_maximize_window(start_maximized);
     set_fullscreen(start_in_fullscreen, false);
 }
 
@@ -200,6 +211,10 @@ static void gfx_sdl_set_fullscreen(bool enable) {
     set_fullscreen(enable, true);
 }
 
+static void gfx_sdl_set_maximize_window(bool enable) {
+    set_maximize_window(enable);
+}
+
 static void gfx_sdl_set_cursor_visibility(bool visible) {
     if (visible) {
         SDL_ShowCursor(SDL_ENABLE);
@@ -320,6 +335,7 @@ struct GfxWindowManagerAPI gfx_sdl = {
     gfx_sdl_close,
     gfx_sdl_set_fullscreen_changed_callback,
     gfx_sdl_set_fullscreen,
+    gfx_sdl_set_maximize_window,
     gfx_sdl_get_active_window_refresh_rate,
     gfx_sdl_set_cursor_visibility,
     gfx_sdl_get_dimensions,