Enable text input on video initialization without popping up an on-screen keyboard

Fixes https://github.com/libsdl-org/SDL/issues/8561

(cherry picked from commit 4ff3b28273a9b64892620435231539a1d2c98301)

src/video/SDL_video.c

@@ -566,16 +566,21 @@ int SDL_VideoInit(const char *driver_name)
         SDL_DisableScreenSaver();
     }
 
-    /* If we don't use a screen keyboard, turn on text input by default,
-       otherwise programs that expect to get text events without enabling
-       UNICODE input won't get any events.
-
-       Actually, come to think of it, you needed to call SDL_EnableUNICODE(1)
-       in SDL 1.2 before you got text input events.  Hmm...
-     */
-    if (!SDL_HasScreenKeyboardSupport()) {
+#if !defined(SDL_VIDEO_DRIVER_N3DS)
+    {
+        /* In the initial state we don't want to pop up an on-screen keyboard,
+         * but we do want to allow text input from other mechanisms.
+         */
+        const char *hint = SDL_GetHint(SDL_HINT_ENABLE_SCREEN_KEYBOARD);
+        if (!hint) {
+            SDL_SetHint(SDL_HINT_ENABLE_SCREEN_KEYBOARD, "0");
+        }
         SDL_StartTextInput();
+        if (!hint) {
+            SDL_SetHint(SDL_HINT_ENABLE_SCREEN_KEYBOARD, NULL);
+        }
     }
+#endif /* !SDL_VIDEO_DRIVER_N3DS */
 
     SDL_PostInitMouse();