Android: Properly handle rotations

ConfigurationChanged is not sent on all Android versions because of various bugs in the operating system.
Instead SurfaceChanged is used which is consistent with what SDL does.

Also Window events are not filtered anymore when in the background.
This is required on Android, otherwise rotations are lost.

builds/android/app/src/main/java/org/easyrpg/player/player/EasyRpgPlayerActivity.java

@@ -26,6 +26,7 @@
 
 import android.app.AlertDialog;
 import android.content.ClipDescription;
+import android.content.Context;
 import android.content.Intent;
 import android.content.res.AssetManager;
 import android.content.res.Configuration;
@@ -62,6 +63,7 @@
 import org.easyrpg.player.game_browser.GameBrowserActivity;
 import org.easyrpg.player.settings.SettingsManager;
 import org.libsdl.app.SDLActivity;
+import org.libsdl.app.SDLSurface;
 
 import java.io.File;
 import java.lang.reflect.Method;
@@ -94,6 +96,11 @@ protected String[] getLibraries() {
         };
     }
 
+    @Override
+    protected SDLSurface createSDLSurface(Context context) {
+        return new EasyRpgSurface(context, this);
+    }
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -438,7 +445,6 @@ public void showInputLayout() {
     public void updateScreenPosition() {
         RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
                 LayoutParams.WRAP_CONTENT);
-        int topMargin, leftMargin;
 
         // Determine the multiplier
         int screenWidth = getWindowManager().getDefaultDisplay().getWidth();

builds/android/app/src/main/java/org/easyrpg/player/player/EasyRpgSurface.java

@@ -0,0 +1,26 @@
+package org.easyrpg.player.player;
+
+import android.content.Context;
+import android.view.SurfaceHolder;
+
+import org.libsdl.app.SDLSurface;
+
+public class EasyRpgSurface extends SDLSurface {
+    private EasyRpgPlayerActivity activity = null;
+
+    public EasyRpgSurface(Context context, EasyRpgPlayerActivity activity) {
+        super(context);
+
+        this.activity = activity;
+    }
+
+    @Override
+    public void surfaceChanged(SurfaceHolder holder,
+                               int format, int width, int height) {
+        // configurationChanged is not always sent because of Android bugs in various versions
+        // SDL uses the surfaceChanged event to detect rotations instead
+        super.surfaceChanged(holder, format, width, height);
+
+        activity.updateScreenPosition();
+    }
+}

src/platform/sdl/sdl2_ui.cpp

@@ -807,6 +807,11 @@ void Sdl2Ui::ProcessWindowEvent(SDL_Event &evnt) {
 		SDL_Event wait_event;
 
 		while (SDL_WaitEvent(&wait_event)) {
+			if (wait_event.type == SDL_WINDOWEVENT && wait_event.window.event != SDL_WINDOWEVENT_FOCUS_LOST) {
+				// Process size change etc. events
+				ProcessWindowEvent(wait_event);
+			}
+
 			if (FilterUntilFocus(&wait_event)) {
 				break;
 			}

src/platform/sdl/sdl3_ui.cpp

@@ -175,7 +175,7 @@ Sdl3Ui::~Sdl3Ui() {
 
 #ifdef SUPPORT_AUDIO
 	audio_.reset();
-#endif	
+#endif
 
 	SDL_Quit();
 }
@@ -732,6 +732,11 @@ void Sdl3Ui::ProcessWindowEvent(SDL_Event &evnt) {
 		SDL_Event wait_event;
 
 		while (SDL_WaitEvent(&wait_event)) {
+			if (wait_event.type >= SDL_EVENT_WINDOW_FIRST && wait_event.type <= SDL_EVENT_WINDOW_LAST && wait_event.type != SDL_EVENT_WINDOW_FOCUS_LOST) {
+				// Process size change etc. events
+				ProcessWindowEvent(wait_event);
+			}
+
 			if (FilterUntilFocus(&wait_event)) {
 				break;
 			}