update SDL3 from 3.2.20 to 3.4.2

libs/SDL3/cmake/test/main_gui.c

@@ -1,24 +1,37 @@
-#include <SDL3/SDL.h>
+#define SDL_MAIN_USE_CALLBACKS
 #include <SDL3/SDL_main.h>
+#include <SDL3/SDL.h>
 
-int main(int argc, char *argv[])
+static SDL_Window *window;
+
+SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
+{
+    return SDL_APP_CONTINUE;
+}
+
+SDL_AppResult SDL_AppIterate(void *appstate)
 {
-    SDL_Window *window = NULL;
     SDL_Surface *screenSurface = NULL;
+    screenSurface = SDL_GetWindowSurface(window);
+    SDL_FillSurfaceRect(screenSurface, NULL, SDL_MapSurfaceRGB(screenSurface, 0xff, 0xff, 0xff));
+    SDL_UpdateWindowSurface(window);
+    return SDL_APP_CONTINUE;
+}
+
+SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
+{
     if (!SDL_Init(SDL_INIT_VIDEO)) {
         SDL_Log("Could not initialize SDL: %s", SDL_GetError());
-        return 1;
+        return SDL_APP_FAILURE;
     }
     window = SDL_CreateWindow("Hello SDL", 640, 480, 0);
     if (!window) {
         SDL_Log("could not create window: %s", SDL_GetError());
-        return 1;
+        return SDL_APP_FAILURE;
     }
-    screenSurface = SDL_GetWindowSurface(window);
-    SDL_FillSurfaceRect(screenSurface, NULL, SDL_MapSurfaceRGB(screenSurface, 0xff, 0xff, 0xff));
-    SDL_UpdateWindowSurface(window);
-    SDL_Delay(100);
-    SDL_DestroyWindow(window);
-    SDL_Quit();
-    return 0;
+    return SDL_APP_CONTINUE;
+}
+
+void SDL_AppQuit(void *appstate, SDL_AppResult result) {
+    SDL_DestroyWindow(window);
 }